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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.
*
* 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
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