Logo Search packages:      
Sourcecode: scummvm version File versions  Download package

widget.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/widget.cpp,v 1.54.2.1 2005/10/18 02:11:18 sev Exp $
 */

#include "common/stdafx.h"
#include "common/util.h"
#include "graphics/fontman.h"
#include "gui/widget.h"
#include "gui/dialog.h"
#include "gui/newgui.h"

namespace GUI {

Widget::Widget(GuiObject *boss, int x, int y, int w, int h)
      : GuiObject(x, y, w, h), _type(0), _boss(boss),
        _id(0), _flags(0), _hasFocus(false) {
      // Insert into the widget list of the boss
      _next = _boss->_firstWidget;
      _boss->_firstWidget = this;
}

Widget::~Widget() {
      delete _next;
}

void Widget::draw() {
      NewGui *gui = &g_gui;

      if (!isVisible() || !_boss->isVisible())
            return;

      int oldX = _x, oldY = _y;

      // Account for our relative position in the dialog
      _x = getAbsX();
      _y = getAbsY();

      // Clear background (unless alpha blending is enabled)
      if (_flags & WIDGET_CLEARBG)
            gui->fillRect(_x, _y, _w, _h, gui->_bgcolor);

      // Draw border
      if (_flags & WIDGET_BORDER) {
            OverlayColor colorA = gui->_color;
            OverlayColor colorB = gui->_shadowcolor;
            if ((_flags & WIDGET_INV_BORDER) == WIDGET_INV_BORDER)
                  SWAP(colorA, colorB);
            gui->box(_x, _y, _w, _h, colorA, colorB);
            _x += 4;
            _y += 4;
            _w -= 8;
            _h -= 8;
      }

      // Now perform the actual widget draw
      drawWidget((_flags & WIDGET_HILITED) ? true : false);

      // Restore x/y
      if (_flags & WIDGET_BORDER) {
            _x -= 4;
            _y -= 4;
            _w += 8;
            _h += 8;
      }

      // Flag the draw area as dirty
      gui->addDirtyRect(_x, _y, _w, _h);

      _x = oldX;
      _y = oldY;

      // Draw all children
      Widget *w = _firstWidget;
      while (w) {
            w->draw();
            w = w->_next;
      }
}

Widget *Widget::findWidgetInChain(Widget *w, int x, int y) {
      while (w) {
            // Stop as soon as we find a widget that contains the point (x,y)
            if (x >= w->_x && x < w->_x + w->_w && y >= w->_y && y < w->_y + w->_h)
                  break;
            w = w->_next;
      }
      if (w)
            w = w->findWidget(x - w->_x, y - w->_y);
      return w;
}

#pragma mark -

StaticTextWidget::StaticTextWidget(GuiObject *boss, int x, int y, int w, int h, const String &text, TextAlignment align, WidgetSize ws)
      : Widget(boss, x, y, w, h), _align(align), _ws(ws) {
      _flags = WIDGET_ENABLED;
      _type = kStaticTextWidget;
      _label = text;
}

void StaticTextWidget::setValue(int value) {
      char buf[256];
      sprintf(buf, "%d", value);
      _label = buf;
}

void StaticTextWidget::setLabel(const String &label) {
      _label = label;
      // TODO: We should automatically redraw when the label is changed.
      // The following doesn't quite work when we are using tabs, plus it
      // is rather clumsy to force a full redraw for a single static text.
      // However, as long as we do blending, it might be the only way.
      //_boss->draw();
}

void StaticTextWidget::setAlign(TextAlignment align) {
      _align = align;
      // TODO: We should automatically redraw when the alignment is changed.
      // See setLabel() for more insights.
}


void StaticTextWidget::drawWidget(bool hilite) {
      NewGui *gui = &g_gui;
      gui->drawString(_label, _x, _y, _w, isEnabled() ? gui->_textcolor : gui->_color, _align);
}

#pragma mark -

ButtonWidget::ButtonWidget(GuiObject *boss, int x, int y, int w, int h, const String &label, uint32 cmd, uint8 hotkey, WidgetSize ws)
      : StaticTextWidget(boss, x, y, w, h, label, kTextAlignCenter, ws), CommandSender(boss),
        _cmd(cmd), _hotkey(hotkey) {
      _flags = WIDGET_ENABLED | WIDGET_BORDER | WIDGET_CLEARBG;
      _type = kButtonWidget;
}

void ButtonWidget::handleMouseUp(int x, int y, int button, int clickCount) {
      if (isEnabled() && x >= 0 && x < _w && y >= 0 && y < _h)
            sendCommand(_cmd, 0);
}

void ButtonWidget::drawWidget(bool hilite) {
      NewGui *gui = &g_gui;
      const int off = (_h - g_gui.getFontHeight()) / 2;
      gui->drawString(_label, _x, _y + off, _w,
                              !isEnabled() ? gui->_color :
                              hilite ? gui->_textcolorhi : gui->_textcolor, _align);
}

#pragma mark -

CheckboxWidget::CheckboxWidget(GuiObject *boss, int x, int y, int w, int h, const String &label, uint32 cmd, uint8 hotkey, WidgetSize ws)
      : ButtonWidget(boss, x, y, w, h, label, cmd, hotkey, ws), _state(false) {
      _flags = WIDGET_ENABLED;
      _type = kCheckboxWidget;
}

void CheckboxWidget::handleMouseUp(int x, int y, int button, int clickCount) {
      if (isEnabled() && x >= 0 && x < _w && y >= 0 && y < _h) {
            toggleState();
      }
}

void CheckboxWidget::setState(bool state) {
      if (_state != state) {
            _state = state;
            _flags ^= WIDGET_INV_BORDER;
            draw();
      }
      sendCommand(_cmd, _state);
}

void CheckboxWidget::drawWidget(bool hilite) {
      NewGui *gui = &g_gui;
      int fontHeight = gui->getFontHeight();

      // Draw the box
      gui->box(_x, _y, fontHeight + 4, fontHeight + 4, gui->_color, gui->_shadowcolor);
      gui->fillRect(_x + 2, _y + 2, fontHeight, fontHeight, gui->_bgcolor);

      // If checked, draw cross inside the box
      if (_state) {
            Graphics::Surface &surf = gui->getScreen();
            Common::Point p0, p1, p2, p3;
            OverlayColor color = isEnabled() ? gui->_textcolor : gui->_color;

            p0 = Common::Point(_x + 4, _y + 4);
            p1 = Common::Point(_x + fontHeight - 1, _y + 4);
            p2 = Common::Point(_x + 4, _y + fontHeight - 1);
            p3 = Common::Point(_x + fontHeight - 1, _y + fontHeight - 1);

            if (_ws == kBigWidgetSize) {
                  surf.drawLine(p0.x + 1, p0.y, p3.x, p3.y - 1, color);
                  surf.drawLine(p0.x, p0.y + 1, p3.x - 1, p3.y, color);
                  surf.drawLine(p0.x + 1, p0.y + 1, p3.x - 1, p3.y - 1, color);
                  surf.drawLine(p2.x + 1, p2.y - 1, p1.x - 1, p1.y + 1, color);
                  surf.drawLine(p2.x + 1, p2.y, p1.x, p1.y + 1, color);
                  surf.drawLine(p2.x, p2.y - 1, p1.x - 1, p1.y, color);
            } else {
                  surf.drawLine(p0.x, p0.y, p3.x, p3.y, color);
                  surf.drawLine(p2.x, p2.y, p1.x, p1.y, color);
            }
      }

      // Finally draw the label
      gui->drawString(_label, _x + fontHeight + 10, _y + 3, _w, isEnabled() ? gui->_textcolor : gui->_color);
}

#pragma mark -

SliderWidget::SliderWidget(GuiObject *boss, int x, int y, int w, int h, uint32 cmd)
      : Widget(boss, x, y, w, h), CommandSender(boss),
        _cmd(cmd), _value(0), _oldValue(0), _valueMin(0), _valueMax(100), _isDragging(false) {
      _flags = WIDGET_ENABLED | WIDGET_TRACK_MOUSE | WIDGET_CLEARBG;
      _type = kSliderWidget;
}

void SliderWidget::handleMouseMoved(int x, int y, int button) {
      if (isEnabled() && _isDragging && x >= 0) {
            int newValue = posToValue(x);
            if (newValue < _valueMin)
                  newValue = _valueMin;
            else if (newValue > _valueMax)
                  newValue = _valueMax;

            if (newValue != _value) {
                  _value = newValue;
                  draw();
                  sendCommand(_cmd, _value);    // FIXME - hack to allow for "live update" in sound dialog
            }
      }
}

void SliderWidget::handleMouseDown(int x, int y, int button, int clickCount) {
      if (isEnabled()) {
            _isDragging = true;
            handleMouseMoved(x, y, button);
      }
}

void SliderWidget::handleMouseUp(int x, int y, int button, int clickCount) {
      if (isEnabled() && _isDragging) {
            sendCommand(_cmd, _value);
      }
      _isDragging = false;
}

void SliderWidget::drawWidget(bool hilite) {
      NewGui *gui = &g_gui;

      // Draw the box
      gui->box(_x, _y, _w, _h, gui->_color, gui->_shadowcolor);

      // Draw the 'bar'
      gui->fillRect(_x + 2, _y + 2, valueToPos(_value), _h - 4,
                        !isEnabled() ? gui->_color :
                        hilite ? gui->_textcolorhi : gui->_textcolor);
}

int SliderWidget::valueToPos(int value) {
      return ((_w - 4) * (value - _valueMin) / (_valueMax - _valueMin));
}

int SliderWidget::posToValue(int pos) {
      return (pos) * (_valueMax - _valueMin) / (_w - 4) + _valueMin;
}

#pragma mark -

GraphicsWidget::GraphicsWidget(GuiObject *boss, int x, int y, int w, int h)
      : Widget(boss, x, y, w, h), _gfx() {
      _flags = WIDGET_ENABLED | WIDGET_CLEARBG;
      _type = kGraphicsWidget;
}

GraphicsWidget::~GraphicsWidget() {
      _gfx.free();
}

void GraphicsWidget::setGfx(const Graphics::Surface *gfx) {
      _gfx.free();

      if (!gfx || !gfx->pixels)
            return;

      // TODO: add conversion to OverlayColor
      _gfx.create(gfx->w, gfx->h, gfx->bytesPerPixel);
      memcpy(_gfx.pixels, gfx->pixels, gfx->h * gfx->pitch);
}

void GraphicsWidget::drawWidget(bool hilite) {
      if (sizeof(OverlayColor) != _gfx.bytesPerPixel || !_gfx.pixels) {
            // FIXME: It doesn't really make sense to render this text here, since
            // this widget might be used for other things than rendering savegame
            // graphics/previews...
            g_gui.drawString("No preview", _x, _y + _h / 2 - g_gui.getFontHeight() / 2, _w, g_gui._textcolor, Graphics::kTextAlignCenter);
      } else
            g_gui.drawSurface(_gfx, _x, _y);
}

} // End of namespace GUI

Generated by  Doxygen 1.6.0   Back to index