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117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
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/*
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* This file is part of the mouse gesture package.
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* Copyright (C) 2006 Johan Thelin <e8johan@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the
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* following conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* - Redistributions in binary form must reproduce the
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* above copyright notice, this list of conditions and
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* the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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* - The names of its contributors may be used to endorse
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* or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef MOUSEGESTURERECOGNIZER_H
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#define MOUSEGESTURERECOGNIZER_H
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#include <list>
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#include <vector>
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namespace Gesture
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{
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/*
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* Sub-class and implement callback method and register along a gesture description.
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*/
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class MouseGestureCallback
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{
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public:
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virtual void callback() = 0;
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};
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/*
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* The available directions.
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*/
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typedef enum { Up, Down, Left, Right, AnyHorizontal, AnyVertical, UpLeft, UpRight, DownLeft, DownRight, NoMatch } Direction;
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/*
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* A list of directions.
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*/
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typedef std::list<Direction> DirectionList;
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/*
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* Create lists of directions and connect to a callback.
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*/
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struct GestureDefinition {
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GestureDefinition(const DirectionList &d, MouseGestureCallback* c) : directions(d), callbackClass(c) {}
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DirectionList directions;
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MouseGestureCallback* callbackClass;
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};
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/*
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* Data types for internal use
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*/
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struct Pos {
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Pos(int ix, int iy) : x(ix), y(iy) {}
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int x, y;
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};
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typedef std::vector<Pos> PosList;
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typedef std::vector<GestureDefinition> GestureList;
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class MouseGestureRecognizer
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{
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public:
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MouseGestureRecognizer(int minimumMovement = 5, double minimumMatch = 0.9, bool allowDiagonals = false);
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~MouseGestureRecognizer();
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void addGestureDefinition(const GestureDefinition &gesture);
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void clearGestureDefinitions();
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void startGesture(int x, int y);
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void addPoint(int x, int y);
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bool endGesture(int x, int y);
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void abortGesture();
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PosList currentPath() const;
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private:
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bool recognizeGesture();
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static PosList limitDirections(const PosList &positions, bool allowDiagnonals);
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static PosList simplify(const PosList &positions);
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static PosList removeShortest(const PosList &positions);
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static int calcLength(const PosList &positions);
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struct Private;
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Private* d;
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};
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};
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#endif // MOUSEGESTURERECOGNIZER_H
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