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ScaleAnimation.h

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00001 /* ScummVM - Graphic Adventure Engine
00002  *
00003  * ScummVM is the legal property of its developers, whose names
00004  * are too numerous to list here. Please refer to the COPYRIGHT
00005  * file distributed with this source distribution.
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License
00009  * as published by the Free Software Foundation; either version 2
00010  * of the License, or (at your option) any later version.
00011  *
00012  * This program is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU General Public License
00018  * along with this program; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 // Based on code by omergilad.
00024 
00025 #ifndef GUI_ANIMATION_SCALEANIMATION_H
00026 #define GUI_ANIMATION_SCALEANIMATION_H
00027 
00028 #include "gui/animation/Animation.h"
00029 
00030 namespace GUI {
00031 
00032 class ScaleAnimation: public Animation {
00033 public:
00034     ScaleAnimation() : _endWidth(0), _endWidthFactor(0) {}
00035 
00036     virtual ~ScaleAnimation() {}
00037 
00038     float getEndWidth() const { return _endWidth; }
00039     void setEndWidth(float endWidth) { _endWidth = endWidth; }
00040     float getEndWidthFactor() const { return _endWidthFactor; }
00041     void setEndWidthFactor(float endWidthFactor) { _endWidthFactor = endWidthFactor; }
00042     float getStartWidth() const { return _startWidth; }
00043     void setStartWidth(float startWidth) { _startWidth = startWidth; }
00044 
00045     void updateInternal(Drawable *drawable, float interpolation) {
00046         // If start width was set as 0 -> use the current width as the start dimension
00047         if (_startWidth == 0)
00048             _startWidth = drawable->getWidth();
00049 
00050         // If end width was set as 0 - multiply the start width by the given factor
00051         if (_endWidth == 0)
00052             _endWidth = _startWidth * _endWidthFactor;
00053 
00054         // Calculate width based on interpolation
00055         float width = _startWidth * (1 - interpolation) + _endWidth * interpolation;
00056         drawable->setWidth(width);
00057     }
00058 
00059 private:
00060     virtual void updateInternal(Drawable *drawable, float interpolation);
00061     float _startWidth;
00062     float _endWidth;
00063     float _endWidthFactor;
00064 };
00065 
00066 } // End of namespace GUI
00067 
00068 
00069 #endif /* GUI_ANIMATION_SCALEANIMATION_H */


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