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92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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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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* 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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* 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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*/
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#include "pegasus/elements.h"
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#include "pegasus/items/autodragger.h"
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namespace Pegasus {
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AutoDragger::AutoDragger() {
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_draggingElement = NULL;
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_lastTime = 0;
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initCallBack(this, kCallBackAtExtremes);
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}
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void AutoDragger::autoDrag(DisplayElement *dragElement, const Common::Point &startPoint, const Common::Point &stopPoint,
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TimeValue dragTime, TimeScale dragScale) {
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_draggingElement = dragElement;
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if (_draggingElement) {
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_startLocation = startPoint;
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_stopLocation = stopPoint;
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_lastTime = 0;
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_done = false;
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_draggingElement->moveElementTo(_startLocation.x, _startLocation.y);
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setScale(dragScale);
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setSegment(0, dragTime);
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setTime(0);
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scheduleCallBack(kTriggerAtStop, 0, 0);
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startIdling();
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start();
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} else {
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stopDragging();
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}
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}
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void AutoDragger::stopDragging() {
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cancelCallBack();
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stopIdling();
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_draggingElement = 0;
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_startLocation = Common::Point();
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_stopLocation = Common::Point();
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_lastTime = 0;
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_done = true;
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}
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bool AutoDragger::isDragging() {
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return isIdling();
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}
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void AutoDragger::useIdleTime() {
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TimeValue thisTime = getTime();
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if (thisTime != _lastTime) {
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int32 offsetX = (_stopLocation.x - _startLocation.x) * (int32)thisTime / (int32)getDuration();
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int32 offsetY = (_stopLocation.y - _startLocation.y) * (int32)thisTime / (int32)getDuration();
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_draggingElement->moveElementTo(_startLocation.x + offsetX, _startLocation.y + offsetY);
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_lastTime = thisTime;
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}
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if (_done)
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stopDragging();
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}
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void AutoDragger::callBack() {
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if (isIdling())
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_done = true;
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}
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} // End of namespace Pegasus
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