widget.cpp
/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2006 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.
*
* $Header$
*/
#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