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90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#ifndef GUI_OBJECT_H
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#define GUI_OBJECT_H
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namespace GUI {
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class CommandReceiver;
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class CommandSender;
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class CommandReceiver {
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friend class CommandSender;
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protected:
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virtual ~CommandReceiver() {}
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virtual void handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {}
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};
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class CommandSender {
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// TODO - allow for multiple targets, i.e. store targets in a list
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// and add methods addTarget/removeTarget.
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protected:
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CommandReceiver *_target;
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public:
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CommandSender(CommandReceiver *target) : _target(target) {}
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virtual ~CommandSender() {}
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void setTarget(CommandReceiver *target) { _target = target; }
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CommandReceiver *getTarget() const { return _target; }
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virtual void sendCommand(uint32 cmd, uint32 data) {
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if (_target && cmd)
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_target->handleCommand(this, cmd, data);
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}
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};
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class Widget;
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class GuiObject : public CommandReceiver {
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friend class Widget;
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protected:
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int16 _x, _y;
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uint16 _w, _h;
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Widget *_firstWidget;
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public:
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GuiObject(int x, int y, int w, int h) : _x(x), _y(y), _w(w), _h(h), _firstWidget(0) { }
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virtual int16 getAbsX() const { return _x; }
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virtual int16 getAbsY() const { return _y; }
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virtual int16 getChildX() const { return getAbsX(); }
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virtual int16 getChildY() const { return getAbsY(); }
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virtual uint16 getWidth() const { return _w; }
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virtual uint16 getHeight() const { return _h; }
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virtual bool isVisible() const = 0;
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virtual void draw() = 0;
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protected:
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virtual void releaseFocus() = 0;
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// Convenience alias for OSystem::getMillis().
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// This is a bit hackish, of course :-).
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uint32 getMillis();
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};
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} // End of namespace GUI
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#endif
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