introduced common base class GuiObject for Dialog/Widget -> step towards making it possible to nest widgets (needed for TabWidget)

svn-id: r11052

1 files changed, 75 insertions, 0 deletions

diff --git a/gui/object.h b/gui/object.h
new file mode 100644
index 0000000000..72401af0cf
--- /dev/null
+++ b/gui/object.h
@@ -0,0 +1,75 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2002-2003 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
+
+class CommandReceiver;
+class CommandSender;
+
+class CommandReceiver {
+	friend class CommandSender;
+protected:
+	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) {}
+
+	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 bool 	isVisible() const = 0;
+
+	int16			getX() const	{ return _x; }
+	int16			getY() const	{ return _y; }
+	uint16			getW() const	{ return _w; }
+	uint16			getH() const	{ return _h; }
+
+protected:
+	virtual void	releaseFocus() = 0;
+};
+
+
+#endif