src/ui/GestureReader.h

   1 /* Shopper
   2  * Copyright (C) 2008 David Greaves
   3  *
   4  * This software is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public License
   6  * as published by the Free Software Foundation; either version 2.1 of
   7  * the License, or (at your option) any later version.
   8  *
   9  * This software is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this software; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  17  * 02110-1301 USA
  18  *
  19  */
  20 #ifndef GESTUREREADER_H
  21 #define GESTUREREADER_H
  22
  23 #include "shopper.h"           // automake, i8n, gettext
  24 #include "Gesture.h"
  25
  26 // This class is used to record gesture events
  27 // These can be press, release and move
  28 // as some gestures may have multiple strokes
  29
  30 class GestureReader
  31 {
  32 public:
  33         class Point
  34         {
  35         public:
  36                 typedef enum _Type { Move, Release, Press, Start, Invalid } Type;
  37                 typedef enum _Direction { None,
  38                                            Up, Right, Down, Left,
  39                                            UpRight, DownRight, DownLeft, UpLeft } Direction;
  40
  41                 Point();
  42                 Point( int _x, int _y, int _len, Point::Direction _dir, Point::Type _type);
  43
  44         private:
  45                 friend class GestureReader;
  46                 int x;
  47                 int y;
  48                 int len2; // length squared
  49                 Direction direction;
  50                 Type type;
  51         };
  52
  53 public:
  54         GestureReader();
  55     ~GestureReader();
  56
  57         void start(int x, int y);
  58         void addPoint(int x, int y, Point::Type type);
  59
  60         Gesture matchOne( QList<Gesture> gs);
  61
  62
  63 private:
  64         QString generateStrokes();
  65
  66         struct Private;
  67         Private *p;
  68 };
  69
  70 #endif //GESTUREREADER_H