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/* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#ifndef GUI_OBJECT_H
#define GUI_OBJECT_H
namespace GUI {
class CommandReceiver;
class CommandSender;
class CommandReceiver {
friend class CommandSender;
protected:
virtual ~CommandReceiver() {}
virtual void handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {}
};
class CommandSender {
// TODO - allow for multiple targets, i.e. store targets in a list
// and add methods addTarget/removeTarget.
protected:
CommandReceiver *_target;
public:
CommandSender(CommandReceiver *target) : _target(target) {}
virtual ~CommandSender() {}
void setTarget(CommandReceiver *target) { _target = target; }
CommandReceiver *getTarget() const { return _target; }
virtual void sendCommand(uint32 cmd, uint32 data) {
if (_target && cmd)
_target->handleCommand(this, cmd, data);
}
};
class Widget;
class GuiObject : public CommandReceiver {
friend class Widget;
protected:
int16 _x, _y;
uint16 _w, _h;
Widget *_firstWidget;
public:
GuiObject(int x, int y, int w, int h) : _x(x), _y(y), _w(w), _h(h), _firstWidget(0) { }
virtual int16 getAbsX() const { return _x; }
virtual int16 getAbsY() const { return _y; }
virtual int16 getChildX() const { return getAbsX(); }
virtual int16 getChildY() const { return getAbsY(); }
virtual uint16 getWidth() const { return _w; }
virtual uint16 getHeight() const { return _h; }
virtual bool isVisible() const = 0;
virtual void draw() = 0;
protected:
virtual void releaseFocus() = 0;
// Convenience alias for OSystem::getMillis().
// This is a bit hackish, of course :-).
uint32 getMillis();
};
} // End of namespace GUI
#endif
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