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interface.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2005 The ScummVM project
 *
 * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.      See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/saga/interface.cpp,v 1.160.2.1 2005/10/18 02:11:20 sev Exp $
 *
 */

// Game interface module
#include "saga/saga.h"

#include "saga/gfx.h"
#include "saga/actor.h"
#include "saga/console.h"
#include "saga/events.h"
#include "saga/font.h"
#include "saga/objectmap.h"
#include "saga/isomap.h"
#include "saga/itedata.h"
#include "saga/music.h"
#include "saga/puzzle.h"
#include "saga/render.h"
#include "saga/scene.h"
#include "saga/script.h"
#include "saga/sound.h"
#include "saga/sprite.h"
#include "saga/rscfile.h"
#include "saga/resnames.h"

#include "saga/interface.h"

#include "common/config-manager.h"
#include "common/system.h"
#include "common/timer.h"

namespace Saga {

static int verbTypeToTextStringsIdLUT[2][kVerbTypesMax] = {
      {-1,
      kTextPickUp,
      kTextLookAt,
      kTextWalkTo,
      kTextTalkTo,
      kTextOpen,
      kTextClose,
      kTextGive,
      kTextUse,
      -1,
      -1,
      -1,
      -1,
      -1,
      -1,
      -1,
      -1,
       -1},
      {-1, -1, 2, 1, 5, -1, -1, 7, 4, -1, -1, -1, -1, -1, -1, 3, 6, 8}
};

Interface::Interface(SagaEngine *vm) : _vm(vm) {
      byte *resource;
      size_t resourceLength;
      int i;

      // Load interface module resource file context
      _interfaceContext = _vm->_resource->getContext(GAME_RESOURCEFILE);
      if (_interfaceContext == NULL) {
            error("Interface::Interface() resource context not found");
      }

      _mainPanel.buttons = _vm->getDisplayInfo().mainPanelButtons;
      _mainPanel.buttonsCount = _vm->getDisplayInfo().mainPanelButtonsCount;

      for (i = 0; i < kVerbTypesMax; i++) {
            _verbTypeToPanelButton[i] = NULL;
      }

      for (i = 0; i < _mainPanel.buttonsCount; i++) {
            if (_mainPanel.buttons[i].type == kPanelButtonVerb) {
                  _verbTypeToPanelButton[_mainPanel.buttons[i].id] = &_mainPanel.buttons[i];
            }
      }

      _vm->_resource->loadResource(_interfaceContext, _vm->getResourceDescription()->mainPanelResourceId, resource, resourceLength);
      _vm->decodeBGImage(resource, resourceLength, &_mainPanel.image,
            &_mainPanel.imageLength, &_mainPanel.imageWidth, &_mainPanel.imageHeight);

      free(resource);

      _conversePanel.buttons = _vm->getDisplayInfo().conversePanelButtons;
      _conversePanel.buttonsCount = _vm->getDisplayInfo().conversePanelButtonsCount;

      _vm->_resource->loadResource(_interfaceContext, _vm->getResourceDescription()->conversePanelResourceId, resource, resourceLength);
      _vm->decodeBGImage(resource, resourceLength, &_conversePanel.image,
            &_conversePanel.imageLength, &_conversePanel.imageWidth, &_conversePanel.imageHeight);
      free(resource);

      _optionPanel.buttons = _vm->getDisplayInfo().optionPanelButtons;
      _optionPanel.buttonsCount = _vm->getDisplayInfo().optionPanelButtonsCount;

      _vm->_resource->loadResource(_interfaceContext, _vm->getResourceDescription()->optionPanelResourceId, resource, resourceLength);
      _vm->decodeBGImage(resource, resourceLength, &_optionPanel.image,
            &_optionPanel.imageLength, &_optionPanel.imageWidth, &_optionPanel.imageHeight);
      free(resource);

      _vm->_sprite->loadList(_vm->getResourceDescription()->mainPanelSpritesResourceId, _mainPanel.sprites);

      if (_vm->getGameType() == GType_ITE) {
            _vm->_sprite->loadList(_vm->getResourceDescription()->defaultPortraitsResourceId, _defPortraits);
      }

      setPortraitBgColor(0, 0, 0);

      _mainPanel.x = _vm->getDisplayInfo().mainPanelXOffset;
      _mainPanel.y = _vm->getDisplayInfo().mainPanelYOffset;
      _mainPanel.currentButton = NULL;
      _inventoryUpButton = _mainPanel.getButton(_vm->getDisplayInfo().inventoryUpButtonIndex);
      _inventoryDownButton = _mainPanel.getButton(_vm->getDisplayInfo().inventoryDownButtonIndex);

      _conversePanel.x = _vm->getDisplayInfo().conversePanelXOffset;
      _conversePanel.y = _vm->getDisplayInfo().conversePanelYOffset;
      _conversePanel.currentButton = NULL;
      _converseUpButton = _conversePanel.getButton(_vm->getDisplayInfo().converseUpButtonIndex);
      _converseDownButton = _conversePanel.getButton(_vm->getDisplayInfo().converseDownButtonIndex);

      _leftPortrait = 0;
      _rightPortrait = 0;

      _optionPanel.x = _vm->getDisplayInfo().optionPanelXOffset;
      _optionPanel.y = _vm->getDisplayInfo().optionPanelYOffset;
      _optionPanel.currentButton = NULL;
      _optionSaveFileSlider = _optionPanel.getButton(_vm->getDisplayInfo().optionSaveFileSliderIndex);
      _optionSaveFilePanel = _optionPanel.getButton(_vm->getDisplayInfo().optionSaveFilePanelIndex);

      _quitPanel.x = _vm->getDisplayInfo().quitPanelXOffset;
      _quitPanel.y = _vm->getDisplayInfo().quitPanelYOffset;
      _quitPanel.imageWidth = _vm->getDisplayInfo().quitPanelWidth;
      _quitPanel.imageHeight = _vm->getDisplayInfo().quitPanelHeight;
      _quitPanel.buttons = _vm->getDisplayInfo().quitPanelButtons;
      _quitPanel.buttonsCount = _vm->getDisplayInfo().quitPanelButtonsCount;
      _quitPanel.currentButton = NULL;

      _loadPanel.x = _vm->getDisplayInfo().loadPanelXOffset;
      _loadPanel.y = _vm->getDisplayInfo().loadPanelYOffset;
      _loadPanel.imageWidth = _vm->getDisplayInfo().loadPanelWidth;
      _loadPanel.imageHeight = _vm->getDisplayInfo().loadPanelHeight;
      _loadPanel.buttons = _vm->getDisplayInfo().loadPanelButtons;
      _loadPanel.buttonsCount = _vm->getDisplayInfo().loadPanelButtonsCount;
      _loadPanel.currentButton = NULL;

      _savePanel.x = _vm->getDisplayInfo().savePanelXOffset;
      _savePanel.y = _vm->getDisplayInfo().savePanelYOffset;
      _savePanel.imageWidth = _vm->getDisplayInfo().savePanelWidth;
      _savePanel.imageHeight = _vm->getDisplayInfo().savePanelHeight;
      _savePanel.buttons = _vm->getDisplayInfo().savePanelButtons;
      _savePanel.buttonsCount = _vm->getDisplayInfo().savePanelButtonsCount;
      _saveEdit = _savePanel.getButton(_vm->getDisplayInfo().saveEditIndex);
      _savePanel.currentButton = NULL;

      _protectPanel.x = _vm->getDisplayInfo().protectPanelXOffset;
      _protectPanel.y = _vm->getDisplayInfo().protectPanelYOffset;
      _protectPanel.imageWidth = _vm->getDisplayInfo().protectPanelWidth;
      _protectPanel.imageHeight = _vm->getDisplayInfo().protectPanelHeight;
      _protectPanel.buttons = _vm->getDisplayInfo().protectPanelButtons;
      _protectPanel.buttonsCount = _vm->getDisplayInfo().protectPanelButtonsCount;
      _protectEdit = _protectPanel.getButton(_vm->getDisplayInfo().protectEditIndex);
      _protectPanel.currentButton = NULL;

      _active = true;
      _panelMode = _lockedMode = kPanelNull;
      _savedMode = -1;
      _bossMode = -1;
      _fadeMode = kNoFade;
      _inMainMode = false;
      *_statusText = 0;
      _statusOnceColor = -1;

      _inventoryCount = 0;
      _inventoryPos = 0;
      _inventoryStart = 0;
      _inventoryEnd = 0;
      _inventoryBox = 0;
      _inventorySize = ITE_INVENTORY_SIZE;
      _saveReminderState = 0;

      _optionSaveFileTop = 0;
      _optionSaveFileTitleNumber = 0;

      _inventory = (uint16 *)calloc(_inventorySize, sizeof(uint16));
      if (_inventory == NULL) {
            error("Interface::Interface(): not enough memory");
      }

      _textInputRepeatPhase = 0;
      _textInput = false;
      _statusTextInput = false;
      _statusTextInputState = kStatusTextInputFirstRun;

      _disableAbortSpeeches = false;
}

Interface::~Interface(void) {
      free(_inventory);

      _mainPanel.sprites.freeMem();
      _defPortraits.freeMem();
      _scenePortraits.freeMem();
}

int Interface::activate() {
      if (!_active) {
            _active = true;
            _vm->_script->_skipSpeeches = false;
            _vm->_actor->_protagonist->_targetObject = ID_NOTHING;
            unlockMode();
            if (_panelMode == kPanelMain){
                  _saveReminderState = 1;
            }
            draw();
      }
      _vm->_gfx->showCursor(true);

      return SUCCESS;
}

int Interface::deactivate() {
      if (_active) {
            _active = false;
            lockMode();
            setMode(kPanelNull);
      }
      _vm->_gfx->showCursor(false);

      return SUCCESS;
}

void Interface::rememberMode() {
      assert (_savedMode == -1);

      _savedMode = _panelMode;
}

void Interface::restoreMode() {
      assert (_savedMode != -1);

      _panelMode = _savedMode;
      _savedMode = -1;

      draw();
}

void Interface::setMode(int mode) {
      debug(1, "Interface::setMode %i", mode);

      if (mode == kPanelMain) {
            _inMainMode = true;
            _saveReminderState = 1; //TODO: blinking timeout
      } else {
            if (mode == kPanelConverse) {
                  _inMainMode = false;
            }
            _saveReminderState = 0;
      }

      _panelMode = mode;

      switch (_panelMode) {
      case kPanelMain:
            if (_vm->getGameType() == GType_IHNM)
                  warning("FIXME: Implement IHNM differences from ExecuteInventoryPanel");

            _mainPanel.currentButton = NULL;
            break;
      case kPanelConverse:
            _conversePanel.currentButton = NULL;
            converseDisplayText();
            break;
      case kPanelOption:
            _optionPanel.currentButton = NULL;
            _vm->fillSaveList();
            calcOptionSaveSlider();
            if (_optionSaveFileTitleNumber >= _vm->getDisplayInfo().optionSaveFileVisible) {
                  _optionSaveFileTitleNumber = _vm->getDisplayInfo().optionSaveFileVisible - 1;
            }
            break;
      case kPanelLoad:
            _loadPanel.currentButton = NULL;
            break;
      case kPanelQuit:
            _quitPanel.currentButton = NULL;
            break;
      case kPanelSave:
            _savePanel.currentButton = NULL;
            _textInputMaxWidth = _saveEdit->width - 10;
            _textInput = true;
            _textInputStringLength = strlen(_textInputString);
            _textInputPos = _textInputStringLength + 1;
            _textInputRepeatPhase = 0;
            break;
      case kPanelMap:
            mapPanelShow();
            break;
      case kPanelSceneSubstitute:
            _vm->_render->setFlag(RF_DEMO_SUBST);
            _vm->_gfx->getCurrentPal(_mapSavedPal);
            break;
      case kPanelChapterSelection:
            break;
      case kPanelBoss:
            _vm->_render->setFlag(RF_DEMO_SUBST);
            break;
      case kPanelProtect:
            _protectPanel.currentButton = NULL;
            _textInputMaxWidth = _protectEdit->width - 10;
            _textInput = true;
            _textInputString[0] = 0;
            _textInputStringLength = 0;
            _textInputPos = _textInputStringLength + 1;
            _textInputRepeatPhase = 0;
            break;
      }

      draw();
}

bool Interface::processAscii(uint16 ascii, bool synthetic) {
      // TODO: Checking for Esc and Enter below is a bit hackish, and
      // and probably only works with the English version. Maybe we should
      // add a flag to the button so it can indicate if it's the default or
      // cancel button?

      int i;
      PanelButton *panelButton;
      if (!synthetic)
            _textInputRepeatPhase = 0;
      if (_statusTextInput) {
            processStatusTextInput(ascii);
            return true;
      }

      switch (_panelMode) {
      case kPanelNull:
            if (ascii == 27) { // Esc
                  if (_vm->_scene->isInIntro()) {
                        _vm->_scene->skipScene();
                  } else {
                        if (!_disableAbortSpeeches)
                              _vm->_actor->abortAllSpeeches();
                  }
                  return true;
            }
            break;
      case kPanelCutaway:
            if (ascii == 27) { // Esc
                  if (!_disableAbortSpeeches)
                        _vm->_actor->abortAllSpeeches();
                  _vm->_scene->cutawaySkip();
                  return true;
            }
            break;
      case kPanelVideo:
            if (ascii == 27) { // Esc
                  if (_vm->_scene->isInIntro()) {
                        _vm->_scene->skipScene();
                  } else {
                        if (!_disableAbortSpeeches)
                              _vm->_actor->abortAllSpeeches();
                  }
                  _vm->_scene->cutawaySkip();
            }
            break;
      case kPanelOption:
            // TODO: check input dialog keys
            if (ascii == 27 || ascii == 13) { // Esc or Enter
                  ascii = 'c'; //continue
            }

            for (i = 0; i < _optionPanel.buttonsCount; i++) {
                  panelButton = &_optionPanel.buttons[i];
                  if (panelButton->type == kPanelButtonOption) {
                        if (panelButton->ascii == ascii) {
                              setOption(panelButton);
                              return true;
                        }
                  }
            }
            break;
      case kPanelSave:
            if (_textInput && processTextInput(ascii)) {
                  return true;
            }

            if (ascii == 27) { // Esc
                  ascii = 'c'; // cancel
            } else if (ascii == 13) { // Enter
                  ascii = 's'; // save
            }

            for (i = 0; i < _savePanel.buttonsCount; i++) {
                  panelButton = &_savePanel.buttons[i];
                  if (panelButton->type == kPanelButtonSave) {
                        if (panelButton->ascii == ascii) {
                              setSave(panelButton);
                              return true;
                        }
                  }
            }
            break;
      case kPanelQuit:
            if (ascii == 27) { // Esc
                  ascii = 'c'; // cancel
            } else if (ascii == 13) { // Enter
                  ascii = 'q'; // quit
            }

            for (i = 0; i < _quitPanel.buttonsCount; i++) {
                  panelButton = &_quitPanel.buttons[i];
                  if (panelButton->type == kPanelButtonQuit) {
                        if (panelButton->ascii == ascii) {
                              setQuit(panelButton);
                              return true;
                        }
                  }
            }
            break;
      case kPanelLoad:
            for (i = 0; i < _loadPanel.buttonsCount; i++) {
                  panelButton = &_loadPanel.buttons[i];
                  if (panelButton->type == kPanelButtonLoad) {
                        if (panelButton->ascii == ascii) {
                              setLoad(panelButton);
                              return true;
                        }
                  }
            }
            break;
      case kPanelMain:
            for (i = 0; i < _mainPanel.buttonsCount; i++) {
                  panelButton = &_mainPanel.buttons[i];
                  if (panelButton->ascii == ascii) {
                        if (panelButton->type == kPanelButtonVerb) {
                              _vm->_script->setVerb(panelButton->id);
                        }
                        if (panelButton->type == kPanelButtonArrow) {
                              inventoryChangePos(panelButton->id);
                        }
                        return true;
                  }
            }
            if (ascii == 15) // ctrl-o
            {
                  if (_saveReminderState > 0) {
                        setMode(kPanelOption);
                        return true;
                  }
            }
            break;
      case kPanelConverse:
            switch (ascii) {
            case 'x':
                  setMode(kPanelMain);
                  if (_vm->_puzzle->isActive())
                        _vm->_puzzle->exitPuzzle();
                  break;

            case 'u':
                  converseChangePos(-1);
                  break;

            case 'd':
                  converseChangePos(1);
                  break;

            case '1':
            case '2':
            case '3':
            case '4':
                  converseSetPos(ascii);
                  break;
            }
            break;
      case kPanelMap:
            mapPanelClean();
            break;
      case kPanelSceneSubstitute:
            if (ascii == 13) {
                  _vm->_render->clearFlag(RF_DEMO_SUBST);
                  _vm->_gfx->setPalette(_mapSavedPal);
                  setMode(kPanelMain);
                  _vm->_script->setNoPendingVerb();
            } else if (ascii == 'q' || ascii == 'Q') {
                  _vm->shutDown();
            }
            break;
      case kPanelBoss:
            _vm->_render->clearFlag(RF_DEMO_SUBST);
            keyBossExit();
            break;
      case kPanelProtect:
            if (_textInput && processTextInput(ascii)) {
                  return true;
            }

            if (ascii == 27 || ascii == 13) { // Esc or Enter
                  _vm->_script->wakeUpThreads(kWaitTypeRequest);
                  _vm->_interface->setMode(kPanelMain);
                  
                  _protectHash = 0;

                  for (char *p = _textInputString; *p; p++)
                        _protectHash = (_protectHash << 1) + toupper(*p);
            }
            break;
      }
      return false;
}

#define KEYBOARD_REPEAT_DELAY1 300000L
#define KEYBOARD_REPEAT_DELAY2 50000L

void Interface::textInputRepeatCallback(void *refCon) {
      ((Interface *)refCon)->textInputRepeat();
}

void Interface::textInputStartRepeat(uint16 ascii) {
      if (!_textInputRepeatPhase) {
            _textInputRepeatPhase = 1;
            Common::g_timer->removeTimerProc(&textInputRepeatCallback);
            Common::g_timer->installTimerProc(&textInputRepeatCallback, KEYBOARD_REPEAT_DELAY1, this);
      }

      _textInputRepeatChar = ascii;
}

void Interface::textInputRepeat() {
      if (_textInputRepeatPhase == 1) {
            _textInputRepeatPhase = 2;
            Common::g_timer->removeTimerProc(&textInputRepeatCallback);
            Common::g_timer->installTimerProc(&textInputRepeatCallback, KEYBOARD_REPEAT_DELAY2, this);
      } else if (_textInputRepeatPhase == 2) {
            processAscii(_textInputRepeatChar, true);
      }
}

void Interface::processKeyUp(uint16 ascii) {
      if (_textInputRepeatPhase) {
            Common::g_timer->removeTimerProc(&textInputRepeatCallback);
            _textInputRepeatPhase = 0;
      }
}

void Interface::setStatusText(const char *text, int statusColor) {
      assert(text != NULL);
      assert(strlen(text) < STATUS_TEXT_LEN);

      if (_vm->_render->getFlags() & (RF_PLACARD | RF_MAP))
            return;

      strncpy(_statusText, text, STATUS_TEXT_LEN);
      _statusOnceColor = statusColor;
      drawStatusBar();
}

void Interface::loadScenePortraits(int resourceId) {
      _scenePortraits.freeMem();

      _vm->_sprite->loadList(resourceId, _scenePortraits);
}

void Interface::drawVerbPanel(Surface *backBuffer, PanelButton* panelButton) {
      PanelButton * rightButtonVerbPanelButton;
      PanelButton * currentVerbPanelButton;
      int textColor;
      int spriteNumber;
      Point point;

      rightButtonVerbPanelButton = getPanelButtonByVerbType(_vm->_script->getRightButtonVerb());
      currentVerbPanelButton = getPanelButtonByVerbType(_vm->_script->getCurrentVerb());

      if (panelButton->state) {
            textColor = _vm->getDisplayInfo().verbTextActiveColor;
      } else if (panelButton == rightButtonVerbPanelButton) {
            textColor = _vm->getDisplayInfo().verbTextActiveColor;
      } else {
            textColor = _vm->getDisplayInfo().verbTextColor;
      }

      if (panelButton == currentVerbPanelButton) {
            spriteNumber = panelButton->downSpriteNumber;
      } else {
            spriteNumber = panelButton->upSpriteNumber;
      }
      point.x = _mainPanel.x + panelButton->xOffset;
      point.y = _mainPanel.y + panelButton->yOffset;

      _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _mainPanel.sprites, spriteNumber, point, 256);

      drawVerbPanelText(backBuffer, panelButton, textColor, _vm->getDisplayInfo().verbTextShadowColor);
}

void Interface::draw() {
      Surface *backBuffer;
      int i;

      Point leftPortraitPoint;
      Point rightPortraitPoint;
      Rect rect;

      backBuffer = _vm->_gfx->getBackBuffer();

      if (_vm->_scene->isInIntro() || _fadeMode == kFadeOut)
            return;

      drawStatusBar();

      if (_panelMode == kPanelMain || _panelMode == kPanelMap) {
            _mainPanel.getRect(rect);
            backBuffer->blit(rect, _mainPanel.image);

            for (i = 0; i < kVerbTypesMax; i++) {
                  if (_verbTypeToPanelButton[i] != NULL) {
                        drawVerbPanel(backBuffer, _verbTypeToPanelButton[i]);
                  }
            }
      } else if (_panelMode == kPanelConverse) {
            _conversePanel.getRect(rect);
            backBuffer->blit(rect, _conversePanel.image);
            converseDisplayTextLines(backBuffer);
      }

      if (_vm->getGameType() == GType_IHNM) {
            if (_vm->_spiritualBarometer > 255)
                  _vm->_gfx->setPaletteColor(kIHNMColorPortrait, 0xff, 0xff, 0xff);
            else
                  _vm->_gfx->setPaletteColor(kIHNMColorPortrait,
                        _vm->_spiritualBarometer * _portraitBgColor.red / 256,
                        _vm->_spiritualBarometer * _portraitBgColor.green / 256,
                        _vm->_spiritualBarometer * _portraitBgColor.blue / 256);
      }

      if (_panelMode == kPanelMain || _panelMode == kPanelConverse ||
            _lockedMode == kPanelMain || _lockedMode == kPanelConverse) {
            leftPortraitPoint.x = _mainPanel.x + _vm->getDisplayInfo().leftPortraitXOffset;
            leftPortraitPoint.y = _mainPanel.y + _vm->getDisplayInfo().leftPortraitYOffset;
            _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _defPortraits, _leftPortrait, leftPortraitPoint, 256);
      }

      if (!_inMainMode && _vm->getDisplayInfo().rightPortraitXOffset >= 0) { //FIXME: should we change !_inMainMode to _panelMode == kPanelConverse ?
            rightPortraitPoint.x = _mainPanel.x + _vm->getDisplayInfo().rightPortraitXOffset;
            rightPortraitPoint.y = _mainPanel.y + _vm->getDisplayInfo().rightPortraitYOffset;

            // This looks like hack - particularly since it's only done for
            // the right-side portrait - and perhaps it is! But as far as I
            // can tell this is what the original engine does. And it keeps
            // ITE from crashing when entering the Elk King's court.

            if (_rightPortrait >= _scenePortraits.spriteCount)
                  _rightPortrait = 0;

            _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _scenePortraits, _rightPortrait, rightPortraitPoint, 256);
      }

      drawInventory(backBuffer);
}

void Interface::calcOptionSaveSlider() {
      int totalFiles = _vm->getSaveFilesCount();
      int visibleFiles = _vm->getDisplayInfo().optionSaveFileVisible;
      int height = _optionSaveFileSlider->height;
      int sliderHeight;
      int pos;

      if (totalFiles < visibleFiles) {
            totalFiles = visibleFiles;
      }

      sliderHeight = visibleFiles * height / totalFiles;
      if (sliderHeight < 7) {
            sliderHeight = 7;
      }

      if (totalFiles - visibleFiles <= 0) {
            pos = 0;
      } else {
            pos = _optionSaveFileTop * (height - sliderHeight) / (totalFiles - visibleFiles);
      }
      _optionPanel.calcPanelButtonRect(_optionSaveFileSlider, _optionSaveRectTop);
      _optionSaveRectBottom = _optionSaveRectSlider = _optionSaveRectTop;

      _optionSaveRectTop.bottom = _optionSaveRectTop.top + pos;
      _optionSaveRectTop.top++;
      _optionSaveRectTop.right--;

      _optionSaveRectSlider.top = _optionSaveRectTop.bottom;
      _optionSaveRectSlider.bottom = _optionSaveRectSlider.top + sliderHeight;

      _optionSaveRectBottom.top = _optionSaveRectSlider.bottom;
      _optionSaveRectBottom.right--;
}

void Interface::drawPanelText(Surface *ds, InterfacePanel *panel, PanelButton *panelButton) {
      const char *text;
      int textWidth;
      Rect rect;
      Point textPoint;

      // Button differs for CD version
      if (panelButton->id == kTextReadingSpeed && _vm->getFeatures() & GF_CD_FX)
            return;
      if (panelButton->id == kTextShowDialog && !(_vm->getFeatures() & GF_CD_FX))
            return;

      text = _vm->getTextString(panelButton->id);
      panel->calcPanelButtonRect(panelButton, rect);
      if (panelButton->xOffset < 0) {
            textWidth = _vm->_font->getStringWidth(kMediumFont, text, 0, kFontNormal);
            rect.left += 2 + (panel->imageWidth - 1 - textWidth) / 2;
      }

      textPoint.x = rect.left;
      textPoint.y = rect.top + 1;

      _vm->_font->textDraw(kMediumFont, ds, text, textPoint,
            _vm->getDisplayInfo().verbTextColor, _vm->getDisplayInfo().verbTextShadowColor, kFontShadow);
}

void Interface::drawOption() {
      const char *text;
      Surface *backBuffer;
      int i;
      int fontHeight;
      uint j, idx;
      int fgColor;
      int bgColor;
      Rect rect;
      Rect rect2;
      PanelButton *panelButton;
      Point textPoint;

      backBuffer = _vm->_gfx->getBackBuffer();

      _optionPanel.getRect(rect);
      backBuffer->blit(rect, _optionPanel.image);

      for (i = 0; i < _optionPanel.buttonsCount; i++) {
            panelButton = &_optionPanel.buttons[i];
            if (panelButton->type == kPanelButtonOption) {
                  drawPanelButtonText(backBuffer, &_optionPanel, panelButton);
            }
            if (panelButton->type == kPanelButtonOptionText) {
                  drawPanelText(backBuffer, &_optionPanel, panelButton);
            }
      }

      if (_optionSaveRectTop.height() > 0) {
            backBuffer->drawRect(_optionSaveRectTop, kITEColorDarkGrey);
      }

      drawButtonBox(backBuffer, _optionSaveRectSlider, kSlider, _optionSaveFileSlider->state > 0);

      if (_optionSaveRectBottom.height() > 0) {
            backBuffer->drawRect(_optionSaveRectBottom, kITEColorDarkGrey);
      }

      _optionPanel.calcPanelButtonRect(_optionSaveFilePanel, rect);
      rect.top++;
      rect2 = rect;
      fontHeight = _vm->_font->getHeight(kSmallFont);
      for (j = 0; j < _vm->getDisplayInfo().optionSaveFileVisible; j++) {
            bgColor = kITEColorDarkGrey0C;
            fgColor = kITEColorBrightWhite;

            idx = j + _optionSaveFileTop;
            if (idx == _optionSaveFileTitleNumber) {
                  SWAP(bgColor, fgColor);
            }
            if (idx < _vm->getSaveFilesCount()) {
                  rect2.top = rect.top + j * (fontHeight + 1);
                  rect2.bottom = rect2.top + fontHeight;
                  backBuffer->fillRect(rect2, bgColor);
                  text = _vm->getSaveFile(idx)->name;
                  textPoint.x = rect.left + 1;
                  textPoint.y = rect2.top;
                  _vm->_font->textDraw(kSmallFont, backBuffer, text, textPoint, fgColor, 0, kFontNormal);
            }
      }

}

void Interface::drawQuit() {
      Surface *backBuffer;
      Rect rect;
      int i;
      PanelButton *panelButton;

      backBuffer = _vm->_gfx->getBackBuffer();

      _quitPanel.getRect(rect);
      drawButtonBox(backBuffer, rect, kButton, false);
      for (i = 0; i < _quitPanel.buttonsCount; i++) {
            panelButton = &_quitPanel.buttons[i];
            if (panelButton->type == kPanelButtonQuit) {
                  drawPanelButtonText(backBuffer, &_quitPanel, panelButton);
            }
            if (panelButton->type == kPanelButtonQuitText) {
                  drawPanelText(backBuffer, &_quitPanel, panelButton);
            }
      }
}

void Interface::handleQuitUpdate(const Point& mousePoint) {
      bool releasedButton;

      _quitPanel.currentButton = quitHitTest(mousePoint);
      releasedButton = (_quitPanel.currentButton != NULL) && (_quitPanel.currentButton->state > 0) && (!_vm->mouseButtonPressed());

      if (!_vm->mouseButtonPressed()) {
            _quitPanel.zeroAllButtonState();
      }

      if (releasedButton) {
            setQuit(_quitPanel.currentButton);
      }
}

void Interface::handleQuitClick(const Point& mousePoint) {
      _quitPanel.currentButton = quitHitTest(mousePoint);

      _quitPanel.zeroAllButtonState();

      if (_quitPanel.currentButton == NULL) {
            return;
      }

      _quitPanel.currentButton->state = 1;
}

void Interface::setQuit(PanelButton *panelButton) {
      _quitPanel.currentButton = NULL;
      switch (panelButton->id) {
            case kTextCancel:
                  setMode(kPanelOption);
                  break;
            case kTextQuit:
                  _vm->shutDown();
                  break;
      }
}

void Interface::drawLoad() {
      Surface *backBuffer;
      Rect rect;
      int i;
      PanelButton *panelButton;

      backBuffer = _vm->_gfx->getBackBuffer();

      _loadPanel.getRect(rect);
      drawButtonBox(backBuffer, rect, kButton, false);
      for (i = 0; i < _loadPanel.buttonsCount; i++) {
            panelButton = &_loadPanel.buttons[i];
            if (panelButton->type == kPanelButtonLoad) {
                  drawPanelButtonText(backBuffer, &_loadPanel, panelButton);
            }
            if (panelButton->type == kPanelButtonLoadText) {
                  drawPanelText(backBuffer, &_loadPanel, panelButton);
            }
      }
}

void Interface::handleLoadUpdate(const Point& mousePoint) {
      bool releasedButton;

      _loadPanel.currentButton = loadHitTest(mousePoint);
      releasedButton = (_loadPanel.currentButton != NULL) && (_loadPanel.currentButton->state > 0) && (!_vm->mouseButtonPressed());

      if (!_vm->mouseButtonPressed()) {
            _loadPanel.zeroAllButtonState();
      }

      if (releasedButton) {
            setLoad(_loadPanel.currentButton);
      }
}

void Interface::handleLoadClick(const Point& mousePoint) {
      _loadPanel.currentButton = loadHitTest(mousePoint);

      _loadPanel.zeroAllButtonState();

      if (_loadPanel.currentButton == NULL) {
            return;
      }

      _loadPanel.currentButton->state = 1;
}

void Interface::setLoad(PanelButton *panelButton) {
      _loadPanel.currentButton = NULL;
      switch (panelButton->id) {
            case kTextOK:
                  setMode(kPanelMain);
                  break;
      }
}

void Interface::processStatusTextInput(uint16 ascii) {

      textInputStartRepeat(ascii);
      switch (ascii) {
      case 27: // esc
            _statusTextInputState = kStatusTextInputAborted;
            _statusTextInput = false;
            _vm->_script->wakeUpThreads(kWaitTypeStatusTextInput);
            break;
      case 13: // return
            _statusTextInputState = kStatusTextInputEntered;
            _statusTextInput = false;
            _vm->_script->wakeUpThreads(kWaitTypeStatusTextInput);
            break;
      case 8: // backspace
            if (_statusTextInputPos == 0) {
                  break;
            }
            _statusTextInputPos--;
            _statusTextInputString[_statusTextInputPos] = 0;
      default:
            if (_statusTextInputPos >= STATUS_TEXT_INPUT_MAX) {
                  break;
            }
            if (((ascii >= 'a') && (ascii <='z')) ||
                  ((ascii >= '0') && (ascii <='9')) ||
                  ((ascii >= 'A') && (ascii <='Z')) ||
                  (ascii == ' ')) {
                  _statusTextInputString[_statusTextInputPos++] = ascii;
                  _statusTextInputString[_statusTextInputPos] = 0;
            }
      }
      setStatusText(_statusTextInputString);
}

bool Interface::processTextInput(uint16 ascii) {
      char ch[2];
      char tempString[SAVE_TITLE_SIZE];
      uint tempWidth;
      memset(tempString, 0, SAVE_TITLE_SIZE);
      ch[1] = 0;

      textInputStartRepeat(ascii);

      switch (ascii) {
      case 13:
            return false;
      case 27: // esc
            _textInput = false;
            break;
      case 8: // backspace
            if (_textInputPos <= 1) {
                  break;
            }
            _textInputPos--;
      case 127: // del
            if (_textInputPos <= _textInputStringLength) {
                  if (_textInputPos != 1) {
                        strncpy(tempString, _textInputString, _textInputPos - 1);
                  }
                  if (_textInputPos != _textInputStringLength) {
                        strncat(tempString, &_textInputString[_textInputPos], _textInputStringLength - _textInputPos);
                  }
                  strcpy(_textInputString, tempString);
                  _textInputStringLength = strlen(_textInputString);
            }
            break;
      case 276: // left
            if (_textInputPos > 1) {
                  _textInputPos--;
            }
            break;
      case 275: // right
            if (_textInputPos <= _textInputStringLength) {
                  _textInputPos++;
            }
            break;
      default:
            if (((ascii >= 'a') && (ascii <='z')) ||
                  ((ascii >= '0') && (ascii <='9')) ||
                  ((ascii >= 'A') && (ascii <='Z')) ||
                  (ascii == ' ')) {
                  if (_textInputStringLength < SAVE_TITLE_SIZE - 1) {
                        ch[0] = ascii;
                        tempWidth = _vm->_font->getStringWidth(kSmallFont, ch, 0, kFontNormal);
                        tempWidth += _vm->_font->getStringWidth(kSmallFont, _textInputString, 0, kFontNormal);
                        if (tempWidth > _textInputMaxWidth) {
                                                      break;
                        }
                        if (_textInputPos != 1) {
                              strncpy(tempString, _textInputString, _textInputPos - 1);
                              strcat(tempString, ch);
                        }
                        if ((_textInputStringLength == 0) || (_textInputPos == 1)) {
                              strcpy(tempString, ch);
                        }
                        if ((_textInputStringLength != 0) && (_textInputPos != _textInputStringLength)) {
                              strncat(tempString, &_textInputString[_textInputPos - 1], _textInputStringLength - _textInputPos + 1);
                        }

                        strcpy(_textInputString, tempString);
                        _textInputStringLength = strlen(_textInputString);
                        _textInputPos++;
                  }
            }
            break;
      }
      return true;
}

void Interface::drawTextInput(Surface *ds, InterfacePanel *panel, PanelButton *panelButton) {
      Point textPoint;
      Rect rect;
      char ch[2];
      int fgColor;
      uint i;

      ch[1] = 0;
      panel->calcPanelButtonRect(panelButton, rect);
      drawButtonBox(ds, rect, kEdit, _textInput);
      rect.left += 4;
      rect.top += 4;
      rect.setHeight(_vm->_font->getHeight(kSmallFont));

      i = 0;
      while ((ch[0] = _textInputString[i++]) != 0) {
            rect.setWidth(_vm->_font->getStringWidth(kSmallFont, ch, 0, kFontNormal));
            if ((i == _textInputPos) && _textInput) {
                  fgColor = kITEColorBlack;
                  ds->fillRect(rect, kITEColorWhite);
            } else {
                  fgColor = kITEColorWhite;
            }
            textPoint.x = rect.left;
            textPoint.y = rect.top + 1;

            _vm->_font->textDraw(kSmallFont, ds, ch, textPoint, fgColor, 0, kFontNormal);
            rect.left += rect.width();
      }
      if (_textInput && (_textInputPos >= i)) {
            ch[0] = ' ';
            rect.setWidth(_vm->_font->getStringWidth(kSmallFont, ch, 0, kFontNormal));
            ds->fillRect(rect, kITEColorWhite);
      }
}

void Interface::drawSave() {
      Surface *backBuffer;
      Rect rect;
      int i;
      PanelButton *panelButton;

      backBuffer = _vm->_gfx->getBackBuffer();

      _savePanel.getRect(rect);
      drawButtonBox(backBuffer, rect, kButton, false);
      for (i = 0; i < _savePanel.buttonsCount; i++) {
            panelButton = &_savePanel.buttons[i];
            if (panelButton->type == kPanelButtonSave) {
                  drawPanelButtonText(backBuffer, &_savePanel, panelButton);
            }
            if (panelButton->type == kPanelButtonSaveText) {
                  drawPanelText(backBuffer, &_savePanel, panelButton);
            }
      }

      drawTextInput(backBuffer, &_savePanel, _saveEdit);
}

void Interface::drawProtect() {
      Surface *backBuffer;
      Rect rect;
      int i;
      PanelButton *panelButton;

      backBuffer = _vm->_gfx->getBackBuffer();

      _protectPanel.getRect(rect);
      drawButtonBox(backBuffer, rect, kButton, false);

      for (i = 0; i < _protectPanel.buttonsCount; i++) {
            panelButton = &_protectPanel.buttons[i];
            if (panelButton->type == kPanelButtonProtectText) {
                  drawPanelText(backBuffer, &_protectPanel, panelButton);
            }
      }
      drawTextInput(backBuffer, &_protectPanel, _protectEdit);
}

void Interface::handleSaveUpdate(const Point& mousePoint) {
      bool releasedButton;

      _savePanel.currentButton = saveHitTest(mousePoint);

      validateSaveButtons();

      releasedButton = (_savePanel.currentButton != NULL) &&
            (_savePanel.currentButton->state > 0) && (!_vm->mouseButtonPressed());

      if (!_vm->mouseButtonPressed()) {
            _savePanel.zeroAllButtonState();
      }

      if (releasedButton) {
            setSave(_savePanel.currentButton);
      }
}

void Interface::handleSaveClick(const Point& mousePoint) {
      _savePanel.currentButton = saveHitTest(mousePoint);

      validateSaveButtons();

      _savePanel.zeroAllButtonState();

      if (_savePanel.currentButton == NULL) {
            _textInput = false;
            return;
      }

      _savePanel.currentButton->state = 1;
      if (_savePanel.currentButton == _saveEdit) {
            _textInput = true;
      }
}

void Interface::setSave(PanelButton *panelButton) {
      _savePanel.currentButton = NULL;
      uint titleNumber;
      char *fileName;
      switch (panelButton->id) {
            case kTextSave:
                  if (_textInputStringLength == 0 ) {
                        break;
                  }
                  if (!_vm->isSaveListFull() && (_optionSaveFileTitleNumber == 0)) {
                        if (_vm->locateSaveFile(_textInputString, titleNumber)) {
                              fileName = _vm->calcSaveFileName(_vm->getSaveFile(titleNumber)->slotNumber);
                              _vm->save(fileName, _textInputString);
                              _optionSaveFileTitleNumber = titleNumber;
                        } else {
                              fileName = _vm->calcSaveFileName(_vm->getNewSaveSlotNumber());
                              _vm->save(fileName, _textInputString);
                              _vm->fillSaveList();
                              calcOptionSaveSlider();
                        }
                  } else {
                        fileName = _vm->calcSaveFileName(_vm->getSaveFile(_optionSaveFileTitleNumber)->slotNumber);
                        _vm->save(fileName, _textInputString);
                  }
                  _textInput = false;
                  setMode(kPanelOption);
                  break;
            case kTextCancel:
                  _textInput = false;
                  setMode(kPanelOption);
                  break;
      }
}

void Interface::handleOptionUpdate(const Point& mousePoint) {
      int16 mouseY;
      Rect rect;
      int totalFiles = _vm->getSaveFilesCount();
      int visibleFiles = _vm->getDisplayInfo().optionSaveFileVisible;
      bool releasedButton;

      if (_vm->mouseButtonPressed()) {
            if (_optionSaveFileSlider->state > 0) {
                  _optionPanel.calcPanelButtonRect(_optionSaveFileSlider, rect);

                  mouseY = mousePoint.y - rect.top -_optionSaveFileMouseOff;

                  if (totalFiles - visibleFiles <= 0) {
                        _optionSaveFileTop = 0;
                  } else {
                        _optionSaveFileTop = mouseY * (totalFiles - visibleFiles) /
                              (_optionSaveFileSlider->height - _optionSaveRectSlider.height());
                  }

                  _optionSaveFileTop = clamp(0, _optionSaveFileTop, _vm->getSaveFilesCount() - _vm->getDisplayInfo().optionSaveFileVisible);
                  calcOptionSaveSlider();
            }
      }

      _optionPanel.currentButton = optionHitTest(mousePoint);

      validateOptionButtons();

      releasedButton = (_optionPanel.currentButton != NULL) && (_optionPanel.currentButton->state > 0) && (!_vm->mouseButtonPressed());

      if (!_vm->mouseButtonPressed()) {
            _optionPanel.zeroAllButtonState();
      }

      if (releasedButton) {
            setOption(_optionPanel.currentButton);
      }
}


void Interface::handleOptionClick(const Point& mousePoint) {
      Rect rect;
      _optionPanel.currentButton = optionHitTest(mousePoint);

      validateOptionButtons();

      _optionPanel.zeroAllButtonState();

      if (_optionPanel.currentButton == NULL) {
            return;
      }

      if (_optionPanel.currentButton == _optionSaveFileSlider) {
            if ((_optionSaveRectTop.height() > 0) && (mousePoint.y < _optionSaveRectTop.bottom)) {
                  _optionSaveFileTop -= _vm->getDisplayInfo().optionSaveFileVisible;
            } else {
                  if ((_optionSaveRectBottom.height() > 0) && (mousePoint.y >= _optionSaveRectBottom.top)) {
                        _optionSaveFileTop += _vm->getDisplayInfo().optionSaveFileVisible;
                  } else {
                        if (_vm->getDisplayInfo().optionSaveFileVisible < _vm->getSaveFilesCount()) {
                              _optionSaveFileMouseOff = mousePoint.y - _optionSaveRectSlider.top;
                              _optionPanel.currentButton->state = 1;
                        }
                  }
            }

            _optionSaveFileTop = clamp(0, _optionSaveFileTop, _vm->getSaveFilesCount() - _vm->getDisplayInfo().optionSaveFileVisible);
            calcOptionSaveSlider();
      } else {
            if (_optionPanel.currentButton == _optionSaveFilePanel) {
                  _optionPanel.calcPanelButtonRect(_optionSaveFilePanel, rect);
                  _optionSaveFileTitleNumber = (mousePoint.y - rect.top) / (_vm->_font->getHeight(kSmallFont) + 1);

                  if (_optionSaveFileTitleNumber >= _vm->getDisplayInfo().optionSaveFileVisible) {
                        _optionSaveFileTitleNumber = _vm->getDisplayInfo().optionSaveFileVisible - 1;
                  }
                  _optionSaveFileTitleNumber += _optionSaveFileTop;
                  if (_optionSaveFileTitleNumber >= _vm->getSaveFilesCount()) {
                        _optionSaveFileTitleNumber = _vm->getSaveFilesCount() - 1;
                  }
            } else {
                  _optionPanel.currentButton->state = 1;
            }
      }
}

void Interface::handleChapterSelectionUpdate(const Point& mousePoint) {
      uint16 objectId;

      // FIXME: Original handled more object types here.

      objectId = _vm->_actor->hitTest(mousePoint, true);

      if (objectId != _vm->_script->_pointerObject) {
            _vm->_script->_pointerObject = objectId;
      }
}

void Interface::handleChapterSelectionClick(const Point& mousePoint) {
      int obj = _vm->_script->_pointerObject;

      _vm->_actor->abortSpeech();

      if (obj) {
            int script = 0;
            HitZone *hitZone;
            ActorData *a;
            ObjectData *o;
            Event event;

            switch (objectTypeId(obj)) {
            case kGameObjectHitZone:
                  hitZone = _vm->_scene->_actionMap->getHitZone(objectIdToIndex(obj));
                  if (hitZone->getFlags() & kHitZoneExit)
                        script = hitZone->getScriptNumber();
                  break;

            case kGameObjectActor:
                  a = _vm->_actor->getActor(obj);
                  script = a->_scriptEntrypointNumber;
                  break;

            case kGameObjectObject:
                  o = _vm->_actor->getObj(obj);
                  script = o->_scriptEntrypointNumber;
                  break;
            }

            if (script > 0) {
                  event.type = kEvTOneshot;
                  event.code = kScriptEvent;
                  event.op = kEventExecNonBlocking;
                  event.time = 0;
                  event.param = _vm->_scene->getScriptModuleNumber();
                  event.param2 = script;
                  event.param3 = kVerbUse;            // Action
                  event.param4 = obj;     // Object
                  event.param5 = 0; // With Object
                  event.param6 = obj;           // Actor

                  _vm->_events->queue(&event);
            }
      }
}

void Interface::setOption(PanelButton *panelButton) {
      char * fileName;
      _optionPanel.currentButton = NULL;
      switch (panelButton->id) {
      case kTextContinuePlaying:
            ConfMan.flushToDisk();
            setMode(kPanelMain);
            break;
      case kTextQuitGame:
            setMode(kPanelQuit);
            break;
      case kTextLoad:
            if (_vm->getSaveFilesCount() > 0) {
                  if (_vm->isSaveListFull() || (_optionSaveFileTitleNumber > 0)) {
                        fileName = _vm->calcSaveFileName(_vm->getSaveFile(_optionSaveFileTitleNumber)->slotNumber);
                        setMode(kPanelMain);
                        _vm->load(fileName);
                  }
            }
            break;
      case kTextSave:
            if (!_vm->isSaveListFull() && (_optionSaveFileTitleNumber == 0)) {
                  _textInputString[0] = 0;
            } else {
                  strcpy(_textInputString, _vm->getSaveFile(_optionSaveFileTitleNumber)->name);
            }
            setMode(kPanelSave);
            break;
      case kTextReadingSpeed:
            if (_vm->getFeatures() & GF_CD_FX) {
                  _vm->_subtitlesEnabled = !_vm->_subtitlesEnabled;
                  ConfMan.set("subtitles", _vm->_subtitlesEnabled);
            } else {
                  _vm->_readingSpeed = (_vm->_readingSpeed + 1) % 4;
                  ConfMan.set("talkspeed", _vm->_readingSpeed);
            }
            break;
      case kTextMusic:
            _vm->_musicVolume = (_vm->_musicVolume + 1) % 11;
            _vm->_music->setVolume(_vm->_musicVolume == 10 ? -1 : _vm->_musicVolume * 25, 1);
            ConfMan.set("music_volume", _vm->_musicVolume * 25);
            break;
      case kTextSound:
            _vm->_soundVolume = (_vm->_soundVolume + 1) % 11;
            _vm->_sound->setVolume(_vm->_soundVolume == 10 ? 255 : _vm->_soundVolume * 25);
            ConfMan.set("sfx_volume", _vm->_soundVolume * 25);
            break;
      }
}

void Interface::update(const Point& mousePoint, int updateFlag) {

      if (!_active && _panelMode == kPanelNull && (updateFlag & UPDATE_MOUSECLICK))
            _vm->_actor->abortSpeech();

      if (_vm->_scene->isInIntro() || _fadeMode == kFadeOut || !_active) {
            return;
      }

      if (_statusTextInput) {
            return;
      }

      switch (_panelMode) {
      case kPanelMain:
            if (updateFlag & UPDATE_MOUSEMOVE) {
                  bool lastWasPlayfield = _lastMousePoint.y < _vm->_scene->getHeight();
                  if (mousePoint.y < _vm->_scene->getHeight()) {
                        if (!lastWasPlayfield) {
                              handleMainUpdate(mousePoint);
                        }
                        _vm->_script->whichObject(mousePoint);
                  } else {
                        if (lastWasPlayfield) {
                              _vm->_script->setNonPlayfieldVerb();
                        }
                        handleMainUpdate(mousePoint);
                  }

            } else {

                  if (updateFlag & UPDATE_MOUSECLICK) {
                        if (mousePoint.y < _vm->_scene->getHeight()) {
                              _vm->_script->playfieldClick(mousePoint, (updateFlag & UPDATE_LEFTBUTTONCLICK) != 0);
                        } else {
                              handleMainClick(mousePoint);
                        }
                  }
            }
            break;

      case kPanelConverse:
            if (updateFlag & UPDATE_MOUSEMOVE) {
                  handleConverseUpdate(mousePoint);
            } else {
                  if (updateFlag & UPDATE_MOUSECLICK) {
                        handleConverseClick(mousePoint);
                  }
                  if (updateFlag & UPDATE_WHEELUP) {
                        converseChangePos(-1);
                  }
                  if (updateFlag & UPDATE_WHEELDOWN) {
                        converseChangePos(1);
                  }

                  if (_vm->_puzzle->isActive()) {
                        _vm->_puzzle->handleClick(mousePoint);
                  }
            }
            break;

      case kPanelOption:
            if (updateFlag & UPDATE_MOUSEMOVE) {
                  handleOptionUpdate(mousePoint);
            } else {
                  if (updateFlag & UPDATE_MOUSECLICK) {
                        handleOptionClick(mousePoint);
                  }
                  if (updateFlag & UPDATE_WHEELUP) {
                        if (_optionSaveFileTop)
                              _optionSaveFileTop--;
                        calcOptionSaveSlider();
                  }
                  if (updateFlag & UPDATE_WHEELDOWN) {
                        if (_optionSaveFileTop < _vm->getSaveFilesCount() - _vm->getDisplayInfo().optionSaveFileVisible)
                              _optionSaveFileTop++;
                        calcOptionSaveSlider();
                  }
            }
            break;

      case kPanelQuit:
            if (updateFlag & UPDATE_MOUSEMOVE) {
                  handleQuitUpdate(mousePoint);
            } else {
                  if (updateFlag & UPDATE_MOUSECLICK) {
                        handleQuitClick(mousePoint);
                  }
            }
            break;

      case kPanelLoad:
            if (updateFlag & UPDATE_MOUSEMOVE) {

                  handleLoadUpdate(mousePoint);

            } else {
                  if (updateFlag & UPDATE_MOUSECLICK) {
                        handleLoadClick(mousePoint);
                  }
            }
            break;

      case kPanelSave:
            if (updateFlag & UPDATE_MOUSEMOVE) {

                  handleSaveUpdate(mousePoint);

            } else {
                  if (updateFlag & UPDATE_MOUSECLICK) {
                        handleSaveClick(mousePoint);
                  }
            }
            break;

      case kPanelMap:
            if (updateFlag & UPDATE_MOUSECLICK)
                  mapPanelClean();
            break;

      case kPanelSceneSubstitute:
            if (updateFlag & UPDATE_MOUSECLICK) {
                  _vm->_render->clearFlag(RF_DEMO_SUBST);
                  _vm->_gfx->setPalette(_mapSavedPal);
                  setMode(kPanelMain);
                  _vm->_script->setNoPendingVerb();
            }
            break;

      case kPanelChapterSelection:
            // TODO: panel has silent button
            if (updateFlag & UPDATE_MOUSEMOVE) {
                  handleChapterSelectionUpdate(mousePoint);
            } else {
                  if (updateFlag & UPDATE_MOUSECLICK)
                        handleChapterSelectionClick(mousePoint);
            }
            break;

      case kPanelProtect:
            // No mouse interaction
            break;

      }

      _lastMousePoint = mousePoint;
}

void Interface::drawStatusBar() {
      Surface *backBuffer;
      Rect rect;
      Point textPoint;
      int stringWidth;
      int color;

      if (_panelMode == kPanelChapterSelection)
            return;

      backBuffer = _vm->_gfx->getBackBuffer();

      // Disable this for IHNM for now, since that game uses the full screen
      // in some cases.

      // Erase background of status bar
      rect.left = _vm->getDisplayInfo().statusXOffset;
      rect.top = _vm->getDisplayInfo().statusYOffset;
      rect.right = rect.left + _vm->getDisplayWidth();
      rect.bottom = rect.top + _vm->getDisplayInfo().statusHeight;

      backBuffer->drawRect(rect, _vm->getDisplayInfo().statusBGColor);

      stringWidth = _vm->_font->getStringWidth(kSmallFont, _statusText, 0, kFontNormal);

      if (_statusOnceColor == -1)
            color = _vm->getDisplayInfo().statusTextColor;
      else
            color = _statusOnceColor;

      textPoint.x = _vm->getDisplayInfo().statusXOffset + (_vm->getDisplayInfo().statusWidth - stringWidth) / 2;
      textPoint.y = _vm->getDisplayInfo().statusYOffset + _vm->getDisplayInfo().statusTextY;
      _vm->_font->textDraw(kSmallFont, backBuffer, _statusText, textPoint, color, 0, kFontNormal);

      if (_saveReminderState > 0) {
            rect.left = _vm->getDisplayInfo().saveReminderXOffset;
            rect.top = _vm->getDisplayInfo().saveReminderYOffset;

            rect.right = rect.left + _vm->getDisplayInfo().saveReminderWidth;
            rect.bottom = rect.top + _vm->getDisplayInfo().saveReminderHeight;
            _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _vm->_sprite->_saveReminderSprites,
                  _saveReminderState == 1 ? _vm->getDisplayInfo().saveReminderFirstSpriteNumber : _vm->getDisplayInfo().saveReminderSecondSpriteNumber,
                  rect, 256);

      }
}

void Interface::handleMainClick(const Point& mousePoint) {

      PanelButton *panelButton;

      panelButton = verbHitTest(mousePoint);
      if (panelButton) {
            _vm->_script->setVerb(panelButton->id);
            return;
      }

      panelButton = _mainPanel.hitTest(mousePoint, kPanelAllButtons);

      if (panelButton != NULL) {
            if (panelButton->type == kPanelButtonArrow) {
                  panelButton->state = 1;
                  converseChangePos(panelButton->id);
            }

            if (panelButton->type == kPanelButtonInventory) {
                  if (_vm->_script->_pointerObject != ID_NOTHING) {
                        _vm->_script->hitObject(_vm->leftMouseButtonPressed());
                  }
                  if (_vm->_script->_pendingVerb) {
                        _vm->_actor->_protagonist->_currentAction = kActionWait;
                        _vm->_script->doVerb();
                  }
            }
      } else {
            if (_saveReminderState > 0) {
                  Rect rect;
                  rect.left = _vm->getDisplayInfo().saveReminderXOffset;
                  rect.top = _vm->getDisplayInfo().saveReminderYOffset;

                  rect.right = rect.left + _vm->getDisplayInfo().saveReminderWidth;
                  rect.bottom = rect.top + _vm->getDisplayInfo().saveReminderHeight;
                  if (rect.contains(mousePoint)) {
                        setMode(kPanelOption);
                  }
            }
      }
}

void Interface::handleMainUpdate(const Point& mousePoint) {
      PanelButton *panelButton;

      panelButton = verbHitTest(mousePoint);
      if (_mainPanel.currentButton != panelButton) {
            if (_mainPanel.currentButton) {
                  if (_mainPanel.currentButton->type == kPanelButtonVerb) {
                        setVerbState(_mainPanel.currentButton->id, 0);
                  }
            }
            if (panelButton) {
                  setVerbState(panelButton->id, 1);
            }
      }

      if (panelButton) {
            _mainPanel.currentButton = panelButton;
            return;
      }


      if (!_vm->mouseButtonPressed()) {               // remove pressed flag
            if (_inventoryUpButton) {
                  _inventoryUpButton->state = 0;
                  _inventoryDownButton->state = 0;
            }
      }

      panelButton = _mainPanel.hitTest(mousePoint, kPanelAllButtons);

      bool changed = false;

      if ((panelButton != NULL) && (panelButton->type == kPanelButtonArrow)) {
            if (panelButton->state == 1) {
                  //TODO: insert timeout catchup
                  inventoryChangePos(panelButton->id);
            }
            changed = true;
      } else {
            _vm->_script->whichObject(mousePoint);
      }

      changed = changed || (panelButton != _mainPanel.currentButton);
      _mainPanel.currentButton = panelButton;
      if (changed) {
            draw();
      }
}

//inventory stuff
void Interface::inventoryChangePos(int chg) {
      if ((chg < 0 && _inventoryStart + chg >= 0) ||
            (chg > 0 && _inventoryStart < _inventoryEnd)) {
                  _inventoryStart += chg;
                  draw();
            }
}

void Interface::inventorySetPos(int key) {
      _inventoryBox = key - '1';
      _inventoryPos = _inventoryStart + _inventoryBox;
      if (_inventoryPos >= _inventoryCount)
            _inventoryPos = -1;
}

void Interface::updateInventory(int pos) {
      int cols = _vm->getDisplayInfo().inventoryColumns;
      if (pos >= _inventoryCount) {
            pos = _inventoryCount - 1;
      }
      if (pos < 0) {
            pos = 0;
      }
      _inventoryStart = (pos - cols) / cols * cols;
      if (_inventoryStart < 0) {
            _inventoryStart = 0;
      }

      _inventoryEnd = (_inventoryCount - 1 - cols) / cols * cols;
      if (_inventoryEnd < 0) {
            _inventoryEnd = 0;
      }
}

void Interface::addToInventory(int objectId) {
      if (_inventoryCount >= _inventorySize) {
            return;
      }

      for (int i = _inventoryCount; i > 0; i--) {
            _inventory[i] = _inventory[i - 1];
      }

      _inventory[0] = objectId;
      _inventoryCount++;

      _inventoryPos = 0;
      updateInventory(0);
      draw();
}

void Interface::removeFromInventory(int objectId) {
      int j = inventoryItemPosition(objectId);
      if (j == -1) {
            return;
      }

      int i;

      for (i = j; i < _inventoryCount - 1; i++) {
            _inventory[i] = _inventory[i + 1];
      }

      --_inventoryCount;
      _inventory[_inventoryCount] = 0;
      updateInventory(j);
      draw();
}

void Interface::clearInventory() {
      for (int i = 0; i < _inventoryCount; i++)
            _inventory[i] = 0;

      _inventoryCount = 0;
      updateInventory(0);
}

int Interface::inventoryItemPosition(int objectId) {
      for (int i = 0; i < _inventoryCount; i++)
            if (_inventory[i] == objectId)
                  return i;

      return -1;
}

void Interface::drawInventory(Surface *backBuffer) {
      if (!isInMainMode())
            return;

      int i;
      Rect rect;
      int ci;
      ObjectData *obj;
      ci = _inventoryStart;
      if (_inventoryStart != 0) {
            drawPanelButtonArrow(backBuffer, &_mainPanel, _inventoryUpButton);
      }
      if (_inventoryStart != _inventoryEnd) {
            drawPanelButtonArrow(backBuffer, &_mainPanel, _inventoryDownButton);
      }

      for (i = 0; i < _mainPanel.buttonsCount; i++) {
            if (_mainPanel.buttons[i].type != kPanelButtonInventory) {
                  continue;
            }
            _mainPanel.calcPanelButtonRect(&_mainPanel.buttons[i], rect);

            // TODO: Different colour for IHNM, probably.
            backBuffer->drawRect(rect, kITEColorDarkGrey);

            if (ci < _inventoryCount) {
                  obj = _vm->_actor->getObj(_inventory[ci]);
                  _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _vm->_sprite->_inventorySprites, obj->_spriteListResourceId, rect, 256);
            }

            ci++;
      }
}

void Interface::setVerbState(int verb, int state) {
      PanelButton * panelButton = getPanelButtonByVerbType(verb);
      if (state == 2) {
            state = (_mainPanel.currentButton == panelButton) ? 1 : 0;
      }
      panelButton->state = state;
      draw();
}

void Interface::drawButtonBox(Surface *ds, const Rect& rect, ButtonKind kind, bool down) {
      byte cornerColor;
      byte frameColor;
      byte fillColor;
      byte solidColor;
      byte odl, our, idl, iur;

      switch (kind ) {
            case kSlider:
                  cornerColor = 0x8b;
                  frameColor = kITEColorBlack;
                  fillColor = kITEColorLightBlue96;
                  odl = kITEColorDarkBlue8a;
                  our = kITEColorLightBlue92;
                  idl = 0x89;
                  iur = 0x94;
                  solidColor = down ? kITEColorLightBlue94 : kITEColorLightBlue96;
                  break;
            case kEdit:
                  cornerColor = kITEColorLightBlue96;
                  frameColor = kITEColorLightBlue96;
                  fillColor = kITEColorLightBlue96;
                  our = kITEColorDarkBlue8a;
                  odl = kITEColorLightBlue94;
                  iur = 0x97;
                  idl = 0x95;
                  if (down) {
                        solidColor = kITEColorBlue;
                  } else {
                        solidColor = kITEColorDarkGrey0C;
                  }
                  break;
            default:
                  cornerColor = 0x8b;
                  frameColor = kITEColorBlack;
                  solidColor = fillColor = kITEColorLightBlue96;
                  odl = kITEColorDarkBlue8a;
                  our = kITEColorLightBlue94;
                  idl = 0x97;
                  iur = 0x95;
                  if (down) {
                        SWAP(odl, our);
                        SWAP(idl, iur);
                  }
                  break;
      }

      int x = rect.left;
      int y = rect.top;
      int w = rect.width();
      int h = rect.height();
      int xe = rect.right - 1;
      int ye = rect.bottom - 1;

      ((byte *)ds->getBasePtr(x, y))[0] = cornerColor;
      ((byte *)ds->getBasePtr(x, ye))[0] = cornerColor;
      ((byte *)ds->getBasePtr(xe, y))[0] = cornerColor;
      ((byte *)ds->getBasePtr(xe, ye))[0] = cornerColor;
      ds->hLine(x + 1, y, x + 1 + w - 2, frameColor);
      ds->hLine(x + 1, ye, x + 1 + w - 2, frameColor);
      ds->vLine(x, y + 1, y + 1 + h - 2, frameColor);
      ds->vLine(xe, y + 1, y + 1 + h - 2, frameColor);

      x++;
      y++;
      xe--;
      ye--;
      w -= 2;
      h -= 2;
      ds->vLine(x, y, y + h - 1, odl);
      ds->hLine(x, ye, x + w - 1, odl);
      ds->vLine(xe, y, y + h - 1, our);
      ds->hLine(x + 1, y, x + 1 + w - 2, our);

      x++;
      y++;
      xe--;
      ye--;
      w -= 2;
      h -= 2;
      ((byte *)ds->getBasePtr(x, y))[0] = fillColor;
      ((byte *)ds->getBasePtr(xe, ye))[0] = fillColor;
      ds->vLine(x, y + 1, y + 1 + h - 2, idl);
      ds->hLine(x + 1, ye, x + 1 + w - 2, idl);
      ds->vLine(xe, y, y + h - 1, iur);
      ds->hLine(x + 1, y, x + 1 + w - 2, iur);

      x++; y++;
      w -= 2; h -= 2;

      Common::Rect fill(x, y, x + w, y + h);
      ds->fillRect(fill, solidColor);
}

static const int readingSpeeds[] = { kTextFast, kTextMid, kTextSlow, kTextClick };

void Interface::drawPanelButtonText(Surface *ds, InterfacePanel *panel, PanelButton *panelButton) {
      const char *text;
      int textId;
      int textWidth;
      int textHeight;
      Point point;
      int textColor;
      Rect rect;

      textId = panelButton->id;
      switch(panelButton->id) {
      case kTextReadingSpeed:
            if (_vm->getFeatures() & GF_CD_FX) {
                  if (_vm->_subtitlesEnabled)
                        textId = kTextOn;
                  else
                        textId = kTextOff;
            } else {
                  textId = readingSpeeds[_vm->_readingSpeed];
            }
            break;
      case kTextMusic:
            if (_vm->_musicVolume)
                  textId = kText10Percent + _vm->_musicVolume - 1;
            else
                  textId = kTextOff;
            break;
      case kTextSound:
            if (_vm->_soundVolume)
                  textId = kText10Percent + _vm->_soundVolume - 1;
            else
                  textId = kTextOff;
            break;
      }
      text = _vm->getTextString(textId);

      textWidth = _vm->_font->getStringWidth(kMediumFont, text, 0, kFontNormal);
      textHeight = _vm->_font->getHeight(kMediumFont);

      point.x = panel->x + panelButton->xOffset + (panelButton->width / 2) - (textWidth / 2);
      point.y = panel->y + panelButton->yOffset + (panelButton->height / 2) - (textHeight / 2);

      if (panelButton == panel->currentButton) {
            textColor = _vm->getDisplayInfo().verbTextActiveColor;
      } else {
            textColor = _vm->getDisplayInfo().verbTextColor;
      }

      panel->calcPanelButtonRect(panelButton, rect);
      drawButtonBox(ds, rect, kButton, panelButton->state > 0);

      _vm->_font->textDraw(kMediumFont, ds, text, point,
            textColor, _vm->getDisplayInfo().verbTextShadowColor, kFontShadow);
}

void Interface::drawPanelButtonArrow(Surface *ds, InterfacePanel *panel, PanelButton *panelButton) {
      Point point;
      int spriteNumber;

      if (panel->currentButton == panelButton) {
            if (panelButton->state != 0) {
                  spriteNumber = panelButton->downSpriteNumber;
            } else {
                  spriteNumber = panelButton->overSpriteNumber;
            }
      } else {
            spriteNumber = panelButton->upSpriteNumber;
      }

      point.x = panel->x + panelButton->xOffset;
      point.y = panel->y + panelButton->yOffset;

      _vm->_sprite->draw(ds, _vm->getDisplayClip(), _vm->_sprite->_mainSprites, spriteNumber, point, 256);
}

void Interface::drawVerbPanelText(Surface *ds, PanelButton *panelButton, int textColor, int textShadowColor) {
      const char *text;
      int textWidth;
      Point point;
      int textId;
      FontId font;

      if (_vm->getGameType() == GType_ITE) {
            textId = verbTypeToTextStringsIdLUT[0][panelButton->id];
            text = _vm->getTextString(textId);
            font = kSmallFont;
      } else {
            textId = verbTypeToTextStringsIdLUT[1][panelButton->id];
            text = _vm->_script->_mainStrings.getString(textId + 1);
            font = kIHNMFont8;
            textShadowColor = 0;
      }

      textWidth = _vm->_font->getStringWidth(font, text, 0, kFontNormal);

      if (_vm->getGameType() == GType_ITE) {
            point.x = _mainPanel.x + panelButton->xOffset + 1 + (panelButton->width - 1 - textWidth) / 2;
            point.y = _mainPanel.y + panelButton->yOffset + 1;
      } else {
            point.x = _mainPanel.x + panelButton->xOffset + 1 + (panelButton->width - textWidth) / 2;
            point.y = _mainPanel.y + panelButton->yOffset + 12;
      }

      _vm->_font->textDraw(font, ds, text, point, textColor, textShadowColor, (textShadowColor != 0) ? kFontShadow : kFontNormal);
}


// Converse stuff
void Interface::converseInit(void) {
      for (int i = 0; i < CONVERSE_MAX_TEXTS; i++)
            _converseText[i].text = NULL;
      converseClear();
}

void Interface::converseClear(void) {
      for (int i = 0; i < CONVERSE_MAX_TEXTS; i++) {
            if (_converseText[i].text != NULL) {
                  free(_converseText[i].text);
                  _converseText[i].text = NULL;
            }
            _converseText[i].stringNum = -1;
            _converseText[i].replyId = 0;
            _converseText[i].replyFlags = 0;
            _converseText[i].replyBit = 0;
      }

      _converseTextCount = 0;
      _converseStrCount = 0;
      _converseStartPos = 0;
      _converseEndPos = 0;
      _conversePos = -1;
}

bool Interface::converseAddText(const char *text, int replyId, byte replyFlags, int replyBit) {
      int count = 0;    // count how many pieces of text per string
      int i;
      int len;
      byte c;

      assert(strlen(text) < CONVERSE_MAX_WORK_STRING);

      strncpy(_converseWorkString, text, CONVERSE_MAX_WORK_STRING);

      while (1) {
            len = strlen(_converseWorkString);

            for (i = len; i >= 0; i--) {
                  c = _converseWorkString[i];

                  if ((c == ' ' || c == '\0') && (_vm->_font->getStringWidth(kSmallFont, _converseWorkString, i, kFontNormal) <= _vm->getDisplayInfo().converseMaxTextWidth)) {
                        break;
                  }
            }
            if (i < 0) {
                  return true;
            }

            if (_converseTextCount == CONVERSE_MAX_TEXTS) {
                  return true;
            }

            _converseText[_converseTextCount].text = (char *)malloc(i + 1);
            strncpy(_converseText[_converseTextCount].text, _converseWorkString, i);

            _converseText[_converseTextCount].text[i] = 0;
            _converseText[_converseTextCount].textNum = count;
            _converseText[_converseTextCount].stringNum = _converseStrCount;
            _converseText[_converseTextCount].replyId = replyId;
            _converseText[_converseTextCount].replyFlags = replyFlags;
            _converseText[_converseTextCount].replyBit = replyBit;

            _converseTextCount++;
            count++;

            if (len == i)
                  break;

            strncpy(_converseWorkString, &_converseWorkString[i + 1], len - i);
      }

      _converseStrCount++;

      return false;
}

void Interface::converseDisplayText() {
      int end;

      _converseStartPos = 0;

      end = _converseTextCount - _vm->getDisplayInfo().converseTextLines;

      if (end < 0)
            end = 0;

      _converseEndPos = end;
      draw();
}


void Interface::converseSetTextLines(int row) {
      int pos = row + _converseStartPos;
      if (pos >= _converseTextCount)
            pos = -1;
      if (pos != _conversePos) {
            _conversePos = pos;
            draw();
      }
}

void Interface::converseDisplayTextLines(Surface *ds) {
      int relPos;
      byte foregnd;
      byte backgnd;
      byte bulletForegnd;
      byte bulletBackgnd;
      const char *str;
      char bullet[2] = {
            (char)0xb7, 0
      };
      Rect rect(8, _vm->getDisplayInfo().converseTextLines * _vm->getDisplayInfo().converseTextHeight);
      Point textPoint;

      assert(_conversePanel.buttonsCount >= 6);

      bulletForegnd = kITEColorGreen;
      bulletBackgnd = kITEColorBlack;

      rect.moveTo(_conversePanel.x + _conversePanel.buttons[0].xOffset,
            _conversePanel.y + _conversePanel.buttons[0].yOffset);

      ds->drawRect(rect, kITEColorDarkGrey); //fill bullet place

      for (int i = 0; i < _vm->getDisplayInfo().converseTextLines; i++) {
            relPos = _converseStartPos + i;

            if (_converseTextCount <= relPos) {
                  break;
            }

            if (_conversePos >= 0 && _converseText[_conversePos].stringNum == _converseText[relPos].stringNum) {
                  foregnd = kITEColorBrightWhite;
                  backgnd = (!_vm->leftMouseButtonPressed()) ? kITEColorDarkGrey : kITEColorGrey;
            } else {
                  foregnd = kITEColorBlue;
                  backgnd = kITEColorDarkGrey;
            }

            _conversePanel.calcPanelButtonRect(&_conversePanel.buttons[i], rect);
            rect.left += 8;
            ds->drawRect(rect, backgnd);

            str = _converseText[relPos].text;

            if (_converseText[relPos].textNum == 0) { // first entry
                  textPoint.x = rect.left - 6;
                  textPoint.y = rect.top;

                  _vm->_font->textDraw(kSmallFont, ds, bullet, textPoint, bulletForegnd, bulletBackgnd, (FontEffectFlags)(kFontShadow | kFontDontmap));
            }
            textPoint.x = rect.left + 1;
            textPoint.y = rect.top;
            _vm->_font->textDraw(kSmallFont, ds, str, textPoint, foregnd, kITEColorBlack, kFontShadow);
      }

      if (_converseStartPos != 0) {
            drawPanelButtonArrow(ds, &_conversePanel, _converseUpButton);
      }

      if (_converseStartPos != _converseEndPos) {
            drawPanelButtonArrow(ds, &_conversePanel, _converseDownButton);
      }
}

void Interface::converseChangePos(int chg) {
      if ((chg < 0 && _converseStartPos + chg >= 0) ||
            (chg > 0 && _converseStartPos < _converseEndPos)) {
            _converseStartPos += chg;
            draw();
      }
}

void Interface::converseSetPos(int key) {
      Converse *ct;
      int selection = key - '1';

      if (selection >= _converseTextCount)
            return;

      converseSetTextLines(selection);

      ct = &_converseText[_conversePos];

      _vm->_script->finishDialog(ct->replyId, ct->replyFlags, ct->replyBit);

      if (_vm->_puzzle->isActive())
            _vm->_puzzle->handleReply(ct->replyId);

      _conversePos = -1;
}


void Interface::handleConverseUpdate(const Point& mousePoint) {
      bool changed;

      PanelButton *last = _conversePanel.currentButton;

      if (!_vm->mouseButtonPressed()) {               // remove pressed flag
            if (_converseUpButton) {
                  _converseUpButton->state = 0;
                  _converseDownButton->state = 0;
            }
      }

      _conversePanel.currentButton = converseHitTest(mousePoint);
      changed = last != _conversePanel.currentButton;


      if (_conversePanel.currentButton == NULL) {
            _conversePos = -1;
            if (changed) {
                  draw();
            }
            return;
      }

      if (_conversePanel.currentButton->type == kPanelButtonConverseText) {
            converseSetTextLines(_conversePanel.currentButton->id);
      }

      if (_conversePanel.currentButton->type == kPanelButtonArrow) {
            if (_conversePanel.currentButton->state == 1) {
                  //TODO: insert timeout catchup
                  converseChangePos(_conversePanel.currentButton->id);
            }
            draw();
      }
}


void Interface::handleConverseClick(const Point& mousePoint) {
      _conversePanel.currentButton = converseHitTest(mousePoint);

      if (_conversePanel.currentButton == NULL) {
            return;
      }

      if (_conversePanel.currentButton->type == kPanelButtonConverseText) {
            converseSetPos(_conversePanel.currentButton->ascii);
      }

      if (_conversePanel.currentButton->type == kPanelButtonArrow) {
            _conversePanel.currentButton->state = 1;
            converseChangePos(_conversePanel.currentButton->id);
      }

}

void Interface::saveState(Common::OutSaveFile *out) {
      out->writeUint16LE(_inventoryCount);

      for (int i = 0; i < _inventoryCount; i++) {
            out->writeUint16LE(_inventory[i]);
      }
}

void Interface::loadState(Common::InSaveFile *in) {
      _inventoryCount = in->readUint16LE();

      for (int i = 0; i < _inventoryCount; i++) {
            _inventory[i] = in->readUint16LE();
      }

      updateInventory(0);
}

void Interface::mapPanelShow() {
      int i;
      byte *resource;
      size_t resourceLength, imageLength;
      Surface *backBuffer;
      Rect rect;
      byte *image;
      int imageWidth, imageHeight;
      const byte *pal;
      PalEntry cPal[PAL_ENTRIES];

      _vm->_gfx->showCursor(false);

      backBuffer = _vm->_gfx->getBackBuffer();

      rect.left = rect.top = 0;

      _vm->_resource->loadResource(_interfaceContext, 
                   _vm->_resource->convertResourceId(RID_ITE_TYCHO_MAP), resource, resourceLength);
      if (resourceLength == 0) {
            error("Interface::mapPanelShow() unable to load Tycho map resource");
      }

      _vm->_gfx->getCurrentPal(_mapSavedPal);

      for (i = 0; i < 6 ; i++) {
            _vm->_gfx->palToBlack(_mapSavedPal, 0.2 * i);
            _vm->_render->drawScene();
            _vm->_system->delayMillis(5);
      }

      _vm->_render->setFlag(RF_MAP);

      _vm->decodeBGImage(resource, resourceLength, &image, &imageLength, &imageWidth, &imageHeight);
      pal = _vm->getImagePal(resource, resourceLength);

      for (i = 0; i < PAL_ENTRIES; i++) {
            cPal[i].red = *pal++;
            cPal[i].green = *pal++;
            cPal[i].blue = *pal++;
      }

      rect.setWidth(imageWidth);
      rect.setHeight(imageHeight);

      backBuffer->blit(rect, image);

      // Evil Evil
      for (i = 0; i < 6 ; i++) {
            _vm->_gfx->blackToPal(cPal, 0.2 * i);
            _vm->_render->drawScene();
            _vm->_system->delayMillis(5);
      }

      free(resource);
      free(image);

      setSaveReminderState(false);

      _mapPanelCrossHairState = true;
}

void Interface::mapPanelClean() {
      PalEntry pal[PAL_ENTRIES];
      int i;

      _vm->_gfx->getCurrentPal(pal);

      for (i = 0; i < 6 ; i++) {
            _vm->_gfx->palToBlack(pal, 0.2 * i);
            _vm->_render->drawScene();
            _vm->_system->delayMillis(5);
      }

      _vm->_render->clearFlag(RF_MAP);
      setMode(kPanelMain);

      _vm->_gfx->showCursor(true);
      _vm->_render->drawScene();

      for (i = 0; i < 6 ; i++) {
            _vm->_gfx->blackToPal(_mapSavedPal, 0.2 * i);
            _vm->_render->drawScene();
            _vm->_system->delayMillis(5);
      }
}

void Interface::mapPanelDrawCrossHair() {
      Surface *backBuffer;

      backBuffer = _vm->_gfx->getBackBuffer();
      _mapPanelCrossHairState = !_mapPanelCrossHairState;

      Point mapPosition = _vm->_isoMap->getMapPosition();
      Rect screen(_vm->getDisplayWidth(), _vm->_scene->getHeight());

      if (screen.contains(mapPosition)) {
            _vm->_sprite->draw(backBuffer, _vm->getDisplayClip(), _vm->_sprite->_mainSprites,
                                       _mapPanelCrossHairState? RID_ITE_SPR_XHAIR1 : RID_ITE_SPR_XHAIR2,
                                       mapPosition, 256);
      }
}

void Interface::keyBoss() {
      if (_vm->getGameType() != GType_IHNM)
            return;

      if (_bossMode != -1 || _fadeMode != kNoFade)
            return;

      _vm->_sound->pauseVoice();
      _vm->_sound->pauseSound();
      _vm->_music->pause();

      int i;
      byte *resource;
      size_t resourceLength, imageLength;
      Surface *backBuffer;
      Rect rect;
      byte *image;
      int imageWidth, imageHeight;
      const byte *pal;
      PalEntry cPal[PAL_ENTRIES];

      _vm->_gfx->showCursor(false);

      backBuffer = _vm->_gfx->getBackBuffer();

      rect.left = rect.top = 0;

      _vm->_resource->loadResource(_interfaceContext, RID_IHNM_BOSS_SCREEN, resource, resourceLength);
      if (resourceLength == 0) {
            error("Interface::bossKey() unable to load Boss image resource");
      }

      _bossMode = _panelMode;
      setMode(kPanelBoss);

      _vm->decodeBGImage(resource, resourceLength, &image, &imageLength, &imageWidth, &imageHeight);
      rect.setWidth(imageWidth);
      rect.setHeight(imageHeight);

      _vm->_gfx->getCurrentPal(_mapSavedPal);
      pal = _vm->getImagePal(resource, resourceLength);

      for (i = 0; i < PAL_ENTRIES; i++) {
            cPal[i].red = *pal++;
            cPal[i].green = *pal++;
            cPal[i].blue = *pal++;
      }

      backBuffer->blit(rect, image);

      _vm->_gfx->setPalette(cPal);

      free(resource);
      free(image);
}


void Interface::keyBossExit() {
      PalEntry pal[PAL_ENTRIES];

      _vm->_sound->resumeVoice();
      _vm->_sound->resumeSound();
      _vm->_music->resume();

      _vm->_gfx->getCurrentPal(pal);

      _vm->_gfx->palToBlack(pal, 1);
      setMode(_bossMode);

      _vm->_render->drawScene();

      _vm->_gfx->blackToPal(_mapSavedPal, 1);

      _vm->_gfx->showCursor(true);

      _bossMode = -1;
}


} // End of namespace Saga

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