scummvm/gui/widget.cpp

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/* ScummVM - Scumm Interpreter
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* 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.
*
* $URL$
* $Id$
*/
#include "common/stdafx.h"
#include "common/util.h"
#include "graphics/fontman.h"
#include "gui/widget.h"
#include "gui/dialog.h"
#include "gui/eval.h"
#include "gui/newgui.h"
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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), _hints(THEME_HINT_FIRST_DRAW), _hasFocus(false) {
init();
}
Widget::Widget(GuiObject *boss, const String &name)
: GuiObject(name), _type(0), _boss(boss),
_id(0), _flags(0), _hints(THEME_HINT_FIRST_DRAW), _hasFocus(false) {
init();
}
void Widget::init() {
// Insert into the widget list of the boss
_next = _boss->_firstWidget;
_boss->_firstWidget = this;
// HACK: we enable background saving for all widgets by default for now
_hints = THEME_HINT_FIRST_DRAW | THEME_HINT_SAVE_BACKGROUND;
}
void Widget::resize(int x, int y, int w, int h) {
_x = x;
_y = y;
_w = w;
_h = h;
}
Widget::~Widget() {
delete _next;
}
void Widget::draw() {
NewGui *gui = &g_gui;
if (!isVisible() || !_boss->isVisible())
return;
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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) {
gui->theme()->drawWidgetBackground(Common::Rect(_x, _y, _x+_w, _y+_h), _hints, Theme::kWidgetBackgroundBorder);
_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;
}
_x = oldX;
_y = oldY;
// Draw all children
Widget *w = _firstWidget;
while (w) {
w->draw();
w = w->_next;
}
clearHints(THEME_HINT_FIRST_DRAW);
}
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;
}
Widget *Widget::findWidgetInChain(Widget *w, const char *name) {
while (w) {
if (w->_name == name) {
return w;
}
w = w->_next;
}
return 0;
}
bool Widget::isVisible() const {
if (g_gui.evaluator()->getVar(_name + ".visible") == 0)
return false;
return !(_flags & WIDGET_INVISIBLE);
}
#pragma mark -
StaticTextWidget::StaticTextWidget(GuiObject *boss, int x, int y, int w, int h, const String &text, TextAlignment align)
: Widget(boss, x, y, w, h), _align(align) {
_flags = WIDGET_ENABLED;
_type = kStaticTextWidget;
_label = text;
}
StaticTextWidget::StaticTextWidget(GuiObject *boss, const String &name, const String &text)
: Widget(boss, name) {
_flags = WIDGET_ENABLED;
_type = kStaticTextWidget;
_label = text;
_align = (Graphics::TextAlignment)g_gui.evaluator()->getVar(name + ".align");
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if (_align == (int)EVAL_UNDEF_VAR)
_align = kTextAlignLeft;
}
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) {
g_gui.theme()->drawText(Common::Rect(_x, _y, _x+_w, _y+_h), _label,
isEnabled() ? Theme::kStateEnabled : Theme::kStateDisabled,
g_gui.theme()->convertAligment(_align));
}
#pragma mark -
ButtonWidget::ButtonWidget(GuiObject *boss, int x, int y, int w, int h, const String &label, uint32 cmd, uint8 hotkey)
: StaticTextWidget(boss, x, y, w, h, label, kTextAlignCenter), CommandSender(boss),
_cmd(cmd), _hotkey(hotkey) {
_flags = WIDGET_ENABLED/* | WIDGET_BORDER*/ | WIDGET_CLEARBG;
_type = kButtonWidget;
}
ButtonWidget::ButtonWidget(GuiObject *boss, const String &name, const String &label, uint32 cmd, uint8 hotkey)
: StaticTextWidget(boss, name, label), 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) {
g_gui.theme()->drawButton(Common::Rect(_x, _y, _x+_w, _y+_h), _label, isEnabled() ? (hilite ? Theme::kStateHighlight : Theme::kStateEnabled) : Theme::kStateDisabled);
}
#pragma mark -
CheckboxWidget::CheckboxWidget(GuiObject *boss, int x, int y, int w, int h, const String &label, uint32 cmd, uint8 hotkey)
: ButtonWidget(boss, x, y, w, h, label, cmd, hotkey), _state(false) {
_flags = WIDGET_ENABLED;
_type = kCheckboxWidget;
}
CheckboxWidget::CheckboxWidget(GuiObject *boss, const String &name, const String &label, uint32 cmd, uint8 hotkey)
: ButtonWidget(boss, name, label, cmd, hotkey), _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) {
g_gui.theme()->drawCheckbox(Common::Rect(_x, _y, _x+_w, _y+_h), _label, _state,
isEnabled() ? (hilite ? Theme::kStateHighlight : Theme::kStateEnabled) : Theme::kStateDisabled);
}
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#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;
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_type = kSliderWidget;
}
SliderWidget::SliderWidget(GuiObject *boss, const String &name, uint32 cmd)
: Widget(boss, name), 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);
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if (newValue < _valueMin)
newValue = _valueMin;
else if (newValue > _valueMax)
newValue = _valueMax;
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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);
}
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_isDragging = false;
}
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void SliderWidget::drawWidget(bool hilite) {
g_gui.theme()->drawSlider(Common::Rect(_x, _y, _x+_w, _y+_h), valueToPos(_value),
isEnabled() ? (hilite ? Theme::kStateHighlight : Theme::kStateEnabled) : Theme::kStateDisabled);
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}
int SliderWidget::valueToPos(int value) {
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return (_w * (value - _valueMin) / (_valueMax - _valueMin));
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}
int SliderWidget::posToValue(int pos) {
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return (pos) * (_valueMax - _valueMin) / _w + _valueMin;
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}
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#pragma mark -
GraphicsWidget::GraphicsWidget(GuiObject *boss, int x, int y, int w, int h)
: Widget(boss, x, y, w, h), _gfx(), _alpha(256), _transparency(false) {
_flags = WIDGET_ENABLED | WIDGET_CLEARBG;
_type = kGraphicsWidget;
// HACK: Don't save the background. We want to be sure that redrawing
// the widget updates the screen, even when there isn't any image
// to draw.
_hints &= ~THEME_HINT_SAVE_BACKGROUND;
}
GraphicsWidget::GraphicsWidget(GuiObject *boss, const String &name)
: Widget(boss, name), _gfx(), _alpha(256), _transparency(false) {
_flags = WIDGET_ENABLED | WIDGET_CLEARBG;
_type = kGraphicsWidget;
// HACK: Don't save the background. We want to be sure that redrawing
// the widget updates the screen, even when there isn't any image
// to draw.
_hints &= ~THEME_HINT_SAVE_BACKGROUND;
}
GraphicsWidget::~GraphicsWidget() {
_gfx.free();
}
void GraphicsWidget::setGfx(const Graphics::Surface *gfx) {
_gfx.free();
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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::setGfx(int w, int h, int r, int g, int b) {
if (w == -1)
w = _w;
if (h == -1)
h = _h;
_gfx.free();
_gfx.create(w, h, sizeof(OverlayColor));
OverlayColor *dst = (OverlayColor*)_gfx.pixels;
// TODO: get rid of g_system usage
OverlayColor fillCol = g_system->RGBToColor(r, g, b);
while (h--) {
for (int i = 0; i < w; ++i) {
*dst++ = fillCol;
}
}
}
void GraphicsWidget::drawWidget(bool hilite) {
if (sizeof(OverlayColor) == _gfx.bytesPerPixel && _gfx.pixels) {
g_gui.theme()->drawSurface(Common::Rect(_x, _y, _x+_w, _y+_h), _gfx, Theme::kStateEnabled, _alpha, _transparency);
}
}
#pragma mark -
ContainerWidget::ContainerWidget(GuiObject *boss, int x, int y, int w, int h) : Widget(boss, x, y, w, h) {
_flags = WIDGET_ENABLED | WIDGET_CLEARBG;
_type = kContainerWidget;
}
ContainerWidget::ContainerWidget(GuiObject *boss, const String &name) : Widget(boss, name) {
_flags = WIDGET_ENABLED | WIDGET_CLEARBG;
_type = kContainerWidget;
}
void ContainerWidget::drawWidget(bool hilite) {
g_gui.theme()->drawWidgetBackground(Common::Rect(_x, _y, _x + _w, _y + _h), _hints, Theme::kWidgetBackgroundBorder);
}
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} // End of namespace GUI