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engines/ultima/nuvie/gui/gui_drag_manager.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef NUVIE_GUI_GUI_DRAG_MANAGER_H
+#define NUVIE_GUI_GUI_DRAG_MANAGER_H
+
+#include "ultima/nuvie/gui/gui_status.h"
+#include "ultima/nuvie/gui/gui_drag_area.h"
+
+namespace Ultima {
+namespace Nuvie {
+
+// Drag Messages.
+#define GUI_DRAG_OBJ 0
+
+class Screen;
+
+class GUI_DragManager {
+
+protected:
+
+	Screen *screen;
+
+	GUI_DragArea *drag_source;
+	int message;
+	void *data;
+	bool is_out_of_range;
+
+public:
+
+	GUI_DragManager(Screen *s);
+
+	GUI_status start_drag(GUI_DragArea *src, int msg, void *d, unsigned char *icon_buf, uint16 w, uint16 h, uint8 bpp, bool out_of_range = false);
+	void drop(GUI_DragArea *drag_target, int x, int y);
+
+// let us find out where the drag originated, because we might
+// need to do something different depending on where a dragged
+// object is coming from.
+	GUI_DragArea *get_source();
+
+	void draw(int x, int y);
+};
+
+} // End of namespace Nuvie
+} // End of namespace Ultima
+
+#endif