Merge pull request #275 from clone2727/pegasus

Pegasus engine (The Journeyman Project: Pegasus Prime)

1 files changed, 91 insertions, 0 deletions

diff --git a/engines/pegasus/items/autodragger.cpp b/engines/pegasus/items/autodragger.cpp
new file mode 100644
index 0000000000..de03f8118f
--- /dev/null
+++ b/engines/pegasus/items/autodragger.cpp
@@ -0,0 +1,91 @@
+/* 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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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.
+ *
+ */
+
+#include "pegasus/elements.h"
+#include "pegasus/items/autodragger.h"
+
+namespace Pegasus {
+
+AutoDragger::AutoDragger() {
+	_draggingElement = NULL;
+	_lastTime = 0;
+	initCallBack(this, kCallBackAtExtremes);
+}
+
+void AutoDragger::autoDrag(DisplayElement *dragElement, const Common::Point &startPoint, const Common::Point &stopPoint,
+		TimeValue dragTime, TimeScale dragScale) {
+	_draggingElement = dragElement;
+
+	if (_draggingElement) {
+		_startLocation = startPoint;
+		_stopLocation = stopPoint;
+		_lastTime = 0;
+		_done = false;
+		_draggingElement->moveElementTo(_startLocation.x, _startLocation.y);
+		setScale(dragScale);
+		setSegment(0, dragTime);
+		setTime(0);
+		scheduleCallBack(kTriggerAtStop, 0, 0);
+		startIdling();
+		start();
+	} else {
+		stopDragging();
+	}
+}
+
+void AutoDragger::stopDragging() {
+	cancelCallBack();
+	stopIdling();
+	_draggingElement = 0;
+	_startLocation = Common::Point();
+	_stopLocation = Common::Point();
+	_lastTime = 0;
+	_done = true;
+}
+
+bool AutoDragger::isDragging() {
+	return isIdling();
+}
+
+void AutoDragger::useIdleTime() {	
+	TimeValue thisTime = getTime();
+
+	if (thisTime != _lastTime) {
+		int32 offsetX = (_stopLocation.x - _startLocation.x) * (int32)thisTime / (int32)getDuration();
+		int32 offsetY = (_stopLocation.y - _startLocation.y) * (int32)thisTime / (int32)getDuration();
+		_draggingElement->moveElementTo(_startLocation.x + offsetX, _startLocation.y + offsetY);
+		_lastTime = thisTime;
+	}
+
+	if (_done)
+		stopDragging();
+}
+
+void AutoDragger::callBack() {
+	if (isIdling())
+		_done = true;
+}
+
+} // End of namespace Pegasus