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newgui.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2005 The ScummVM project
 *
 * 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/gui/newgui.cpp,v 1.120.2.1 2005/10/18 02:11:18 sev Exp $
 */

#include "common/stdafx.h"
#include "common/system.h"
#include "common/util.h"
#include "gui/newgui.h"
#include "gui/dialog.h"

#if defined(PALMOS_68K)
#include "arm/native.h"
#include "arm/macros.h"
#endif

DECLARE_SINGLETON(GUI::NewGui);

namespace GUI {

/*
 * TODO list
 * - add more widgets: edit field, popup, radio buttons, ...
 *
 * Other ideas:
 * - allow multi line (l/c/r aligned) text via StaticTextWidget ?
 * - add "close" widget to all dialogs (with a flag to turn it off) ?
 * - make dialogs "moveable" ?
 * - come up with a new look & feel / theme for the GUI
 * - ...
 */

enum {
      kDoubleClickDelay = 500, // milliseconds
      kCursorAnimateDelay = 250,
      kKeyRepeatInitialDelay = 400,
      kKeyRepeatSustainDelay = 100
};

#if defined(__SYMBIAN32__) // Testing: could be removed? Just making sure that an CVS update doesn't break my code :P
#define USE_AUTO_SCALING      false
#else
#define USE_AUTO_SCALING      false
#endif

// Constructor
NewGui::NewGui() : _needRedraw(false),
      _stateIsSaved(false), _font(0), _cursorAnimateCounter(0), _cursorAnimateTimer(0) {

      _system = &OSystem::instance();

      // Clear the cursor
      memset(_cursor, 0xFF, sizeof(_cursor));

      // Reset key repeat
      _currentKeyDown.keycode = 0;

      // updates the scaling factor
      updateScaleFactor();
}

void NewGui::updateColors() {
      // Setup some default GUI colors.
      _bgcolor = _system->RGBToColor(0, 0, 0);
      _color = _system->RGBToColor(104, 104, 104);
      _shadowcolor = _system->RGBToColor(64, 64, 64);
      _textcolor = _system->RGBToColor(32, 160, 32);
      _textcolorhi = _system->RGBToColor(0, 255, 0);
}

void NewGui::updateScaleFactor() {
      const int screenW = g_system->getOverlayWidth();
      const int screenH = g_system->getOverlayHeight();

      // TODO: Perhaps we should also set the widget size here. That'd allow
      // us to remove much of the screen size checking from the individual
      // widgets.

      if (screenW >= 400 && screenH >= 300) {
            _font = FontMan.getFontByUsage(Graphics::FontManager::kBigGUIFont);
      } else {
            _font = FontMan.getFontByUsage(Graphics::FontManager::kGUIFont);
      }
}

void NewGui::runLoop() {
      Dialog *activeDialog = _dialogStack.top();
      bool didSaveState = false;
      int button;

      if (activeDialog == 0)
            return;

      // Setup some default GUI colors. Normally this will be done whenever an
      // EVENT_SCREEN_CHANGED is received. However, not yet all backends support
      // that event, so we also do it "manually" whenever a run loop is entered.
      updateColors();
      updateScaleFactor();

      if (!_stateIsSaved) {
            saveState();
            didSaveState = true;
      }

      while (!_dialogStack.empty() && activeDialog == _dialogStack.top()) {
            activeDialog->handleTickle();

            if (_needRedraw) {
                  // Restore the overlay to its initial state, then draw all dialogs.
                  // This is necessary to get the blending right.
                  _system->clearOverlay();
                  _system->grabOverlay((OverlayColor *)_screen.pixels, _screenPitch);
                  for (int i = 0; i < _dialogStack.size(); i++) {
                        // For each dialog we draw we have to ensure the correct
                        // scaling mode is active.
                        updateScaleFactor();
                        _dialogStack[i]->drawDialog();
                  }
                  _needRedraw = false;
            }

            animateCursor();
            _system->updateScreen();

            OSystem::Event event;
            uint32 time = _system->getMillis();

            while (_system->pollEvent(event)) {
                  Common::Point mouse(event.mouse.x - activeDialog->_x, event.mouse.y - activeDialog->_y);
                  
                  switch (event.type) {
                  case OSystem::EVENT_KEYDOWN:
#if !defined(PALMOS_MODE)
                        // init continuous event stream
                        // not done on PalmOS because keyboard is emulated and keyup is not generated
                        _currentKeyDown.ascii = event.kbd.ascii;
                        _currentKeyDown.keycode = event.kbd.keycode;
                        _currentKeyDown.flags = event.kbd.flags;
                        _keyRepeatTime = time + kKeyRepeatInitialDelay;
#endif
                        activeDialog->handleKeyDown(event.kbd.ascii, event.kbd.keycode, event.kbd.flags);
                        break;
                  case OSystem::EVENT_KEYUP:
                        activeDialog->handleKeyUp(event.kbd.ascii, event.kbd.keycode, event.kbd.flags);
                        if (event.kbd.keycode == _currentKeyDown.keycode)
                              // only stop firing events if it's the current key
                              _currentKeyDown.keycode = 0;
                        break;
                  case OSystem::EVENT_MOUSEMOVE:
                        activeDialog->handleMouseMoved(mouse.x, mouse.y, 0);
                        break;
                  // We don't distinguish between mousebuttons (for now at least)
                  case OSystem::EVENT_LBUTTONDOWN:
                  case OSystem::EVENT_RBUTTONDOWN:
                        button = (event.type == OSystem::EVENT_LBUTTONDOWN ? 1 : 2);
                        if (_lastClick.count && (time < _lastClick.time + kDoubleClickDelay)
                                          && ABS(_lastClick.x - event.mouse.x) < 3
                                          && ABS(_lastClick.y - event.mouse.y) < 3) {
                              _lastClick.count++;
                        } else {
                              _lastClick.x = event.mouse.x;
                              _lastClick.y = event.mouse.y;
                              _lastClick.count = 1;
                        }
                        _lastClick.time = time;
                        activeDialog->handleMouseDown(mouse.x, mouse.y, button, _lastClick.count);
                        break;
                  case OSystem::EVENT_LBUTTONUP:
                  case OSystem::EVENT_RBUTTONUP:
                        button = (event.type == OSystem::EVENT_LBUTTONUP ? 1 : 2);
                        activeDialog->handleMouseUp(mouse.x, mouse.y, button, _lastClick.count);
                        break;
                  case OSystem::EVENT_WHEELUP:
                        activeDialog->handleMouseWheel(mouse.x, mouse.y, -1);
                        break;
                  case OSystem::EVENT_WHEELDOWN:
                        activeDialog->handleMouseWheel(mouse.x, mouse.y, 1);
                        break;
                  case OSystem::EVENT_QUIT:
                        _system->quit();
                        return;
                  case OSystem::EVENT_SCREEN_CHANGED:
                        updateColors();
                        updateScaleFactor();
                        activeDialog->handleScreenChanged();
                        break;
                  }
            }

            // check if event should be sent again (keydown)
            if (_currentKeyDown.keycode != 0) {
                  if (_keyRepeatTime < time) {
                        // fire event
                        activeDialog->handleKeyDown(_currentKeyDown.ascii, _currentKeyDown.keycode, _currentKeyDown.flags);
                        _keyRepeatTime = time + kKeyRepeatSustainDelay;
                  }
            }

            // Delay for a moment
            _system->delayMillis(10);
      }

      if (didSaveState)
            restoreState();
}

#pragma mark -

void NewGui::saveState() {

      // Backup old cursor
      _oldCursorMode = _system->showMouse(true);

      // Enable the overlay
      _system->showOverlay();

      // Create a screen buffer for the overlay data, and fill it with
      // whatever is visible on the screen rught now.
      _screen.h = _system->getOverlayHeight();
      _screen.w = _system->getOverlayWidth();
      _screen.bytesPerPixel = sizeof(OverlayColor);
      _screen.pitch = _screen.w * _screen.bytesPerPixel;
      _screenPitch = _screen.w;
      _screen.pixels = (OverlayColor*)calloc(_screen.w * _screen.h, sizeof(OverlayColor));

      _system->grabOverlay((OverlayColor *)_screen.pixels, _screenPitch);

      _currentKeyDown.keycode = 0;
      _lastClick.x = _lastClick.y = 0;
      _lastClick.time = 0;
      _lastClick.count = 0;

      _stateIsSaved = true;
}

void NewGui::restoreState() {
      _system->showMouse(_oldCursorMode);

      _system->hideOverlay();
      if (_screen.pixels) {
            free(_screen.pixels);
            _screen.pixels = 0;
      }

      _system->updateScreen();

      _stateIsSaved = false;
}

void NewGui::openDialog(Dialog *dialog) {
      _dialogStack.push(dialog);
      _needRedraw = true;
}

void NewGui::closeTopDialog() {
      // Don't do anything if no dialog is open
      if (_dialogStack.empty())
            return;

      // Remove the dialog from the stack
      _dialogStack.pop();
      _needRedraw = true;
}

#pragma mark -

const Graphics::Font &NewGui::getFont() const {
      return *_font;
}

OverlayColor *NewGui::getBasePtr(int x, int y) {
      return (OverlayColor *)_screen.getBasePtr(x, y);
}

void NewGui::box(int x, int y, int width, int height, OverlayColor colorA, OverlayColor colorB) {
      hLine(x + 1, y, x + width - 2, colorA);
      hLine(x, y + 1, x + width - 1, colorA);
      vLine(x, y + 1, y + height - 2, colorA);
      vLine(x + 1, y, y + height - 1, colorA);

      hLine(x + 1, y + height - 2, x + width - 1, colorB);
      hLine(x + 1, y + height - 1, x + width - 2, colorB);
      vLine(x + width - 1, y + 1, y + height - 2, colorB);
      vLine(x + width - 2, y + 1, y + height - 1, colorB);
}

void NewGui::hLine(int x, int y, int x2, OverlayColor color) {
      _screen.hLine(x, y, x2, color);
}

void NewGui::vLine(int x, int y, int y2, OverlayColor color) {
      _screen.vLine(x, y, y2, color);
}

00310 void NewGui::copyToSurface(Graphics::Surface *s, int x, int y, int w, int h) {
      Common::Rect rect(x, y, x + w, y + h);
      rect.clip(_screen.w, _screen.h);

      if (!rect.isValidRect())
            return;

      s->w = rect.width();
      s->h = rect.height();
      s->bytesPerPixel = sizeof(OverlayColor);
      s->pitch = s->w * s->bytesPerPixel;
      s->pixels = (OverlayColor *)malloc(s->pitch * s->h);

      w = s->w;
      h = s->h;

      OverlayColor *dst = (OverlayColor *)s->pixels;
      OverlayColor *src = getBasePtr(rect.left, rect.top);

      while (h--) {
            memcpy(dst, src, s->pitch);
            src += _screenPitch;
            dst += s->w;
      }
}

00336 void NewGui::drawSurface(const Graphics::Surface &s, int x, int y) {
      Common::Rect rect(x, y, x + s.w, y + s.h);
      rect.clip(_screen.w, _screen.h);

      if (!rect.isValidRect())
            return;
      
      assert(s.bytesPerPixel == sizeof(OverlayColor));

      OverlayColor *src = (OverlayColor *)s.pixels;
      OverlayColor *dst = getBasePtr(rect.left, rect.top);

      int w = rect.width();
      int h = rect.height();

      while (h--) {
            memcpy(dst, src, s.pitch);
            src += w;
            dst += _screenPitch;
      }
}

void NewGui::blendRect(int x, int y, int w, int h, OverlayColor color, int level) {
#ifdef NEWGUI_256
      fillRect(x, y, w, h, color);
#else
      Common::Rect rect(x, y, x + w, y + h);
      rect.clip(_screen.w, _screen.h);

      if (!rect.isValidRect())
            return;

      if (_system->hasFeature(OSystem::kFeatureOverlaySupportsAlpha)) {

            int a, r, g, b;
            uint8 aa, ar, ag, ab;
            _system->colorToARGB(color, aa, ar, ag, ab);
            a = aa*level/(level+1);
            if (a < 1)
                  return;
            r = ar * a;
            g = ag * a;
            b = ab * a;

            OverlayColor *ptr = getBasePtr(rect.left, rect.top);
            
            h = rect.height();
            w = rect.width();
            while (h--) {
                  for (int i = 0; i < w; i++) {
                        _system->colorToARGB(ptr[i], aa, ar, ag, ab);
                        int a2 = aa + a - (a*aa)/255;
                        ptr[i] = _system->ARGBToColor(a2,
                                                ((255-a)*aa*ar/255+r)/a2,
                                                ((255-a)*aa*ag/255+g)/a2,
                                                ((255-a)*aa*ab/255+b)/a2);
                  }
                  ptr += _screenPitch;
            }

      } else {

            int r, g, b;
            uint8 ar, ag, ab;
            _system->colorToRGB(color, ar, ag, ab);
            r = ar * level;
            g = ag * level;
            b = ab * level;

            OverlayColor *ptr = getBasePtr(rect.left, rect.top);
            
            h = rect.height();
            w = rect.width();

#ifdef PALMOS_68K
      ARM_START(BlendRectType)
            ARM_INIT(COMMON_BLENDRECT)
            ARM_ADDM(w)
            ARM_ADDM(h)
            ARM_ADDM(ptr)
            ARM_ADDM(_screenPitch)
            ARM_ADDM(r)
            ARM_ADDM(g)
            ARM_ADDM(b)
            ARM_ADDM(level)
            ARM_CALL(ARM_COMMON, PNO_DATA())
      ARM_END()
#endif
            while (h--) {
                  for (int i = 0; i < w; i++) {
                        _system->colorToRGB(ptr[i], ar, ag, ab);
                        ptr[i] = _system->RGBToColor((ar + r) / (level+1),
                                               (ag + g) / (level+1),
                                               (ab + b) / (level+1));
                  }
                  ptr += _screenPitch;
            }

      }
#endif
}

void NewGui::fillRect(int x, int y, int w, int h, OverlayColor color) {
      _screen.fillRect(Common::Rect(x, y, x + w, y + h), color);
}

void NewGui::frameRect(int x, int y, int w, int h, OverlayColor color) {
      _screen.frameRect(Common::Rect(x, y, x + w, y + h), color);
}

void NewGui::addDirtyRect(int x, int y, int w, int h) {
      Common::Rect rect(x, y, x + w, y + h);
      rect.clip(_screen.w, _screen.h);

      if (!rect.isValidRect())
            return;

      // For now we don't keep yet another list of dirty rects but simply
      // blit the affected area directly to the overlay. At least for our current
      // GUI/widget/dialog code that is just fine.
      OverlayColor *buf = getBasePtr(rect.left, rect.top);
      _system->copyRectToOverlay(buf, _screenPitch, rect.left, rect.top, rect.width(), rect.height());
}

void NewGui::drawChar(byte chr, int xx, int yy, OverlayColor color, const Graphics::Font *font) {
      if (font == 0)
            font = &getFont();
      font->drawChar(&_screen, chr, xx, yy, color);
}

int NewGui::getStringWidth(const String &str) const {
      return getFont().getStringWidth(str);
}

int NewGui::getCharWidth(byte c) const {
      return getFont().getCharWidth(c);
}

int NewGui::getFontHeight() const {
      return getFont().getFontHeight();
}

void NewGui::drawString(const String &s, int x, int y, int w, OverlayColor color, TextAlignment align, int deltax, bool useEllipsis) {
      getFont().drawString(&_screen, s, x, y, w, color, align, deltax, useEllipsis);
}

//
// Draw the mouse cursor (animated). This is mostly ripped from the cursor code in gfx.cpp
// We could plug in a different cursor here if we like to.
//
void NewGui::animateCursor() {
      int time = _system->getMillis();
      if (time > _cursorAnimateTimer + kCursorAnimateDelay) {
            const byte colors[4] = { 15, 15, 7, 8 };
            const byte color = colors[_cursorAnimateCounter];
            int i;

            for (i = 0; i < 15; i++) {
                  if ((i < 6) || (i > 8)) {
                        _cursor[16 * 7 + i] = color;
                        _cursor[16 * i + 7] = color;
                  }
            }

            _system->setMouseCursor(_cursor, 16, 16, 7, 7);

            _cursorAnimateTimer = time;
            _cursorAnimateCounter = (_cursorAnimateCounter + 1) % 4;
      }
}

} // End of namespace GUI

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