1 | /* |
2 | * Copyright (C) 2007 Luca Gugelmann <lucag@student.ethz.ch> |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU Library General Public License version 2 as |
6 | * published by the Free Software Foundation |
7 | * |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
11 | * GNU General Public License for more details |
12 | * |
13 | * You should have received a copy of the GNU Library General Public |
14 | * License along with this program; if not, write to the |
15 | * Free Software Foundation, Inc., |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
17 | */ |
18 | |
19 | #ifndef REGIONGRABBER_H |
20 | #define REGIONGRABBER_H |
21 | |
22 | #include <QWidget> |
23 | #include <QRegion> |
24 | #include <QPoint> |
25 | #include <QVector> |
26 | #include <QRect> |
27 | |
28 | class QPaintEvent; |
29 | class QResizeEvent; |
30 | class QMouseEvent; |
31 | |
32 | class RegionGrabber : public QWidget |
33 | { |
34 | Q_OBJECT |
35 | |
36 | enum MaskType { StrokeMask, FillMask }; |
37 | |
38 | public: |
39 | RegionGrabber( const QRect &startSelection ); |
40 | ~RegionGrabber(); |
41 | |
42 | protected slots: |
43 | void init(); |
44 | |
45 | signals: |
46 | void regionGrabbed( const QPixmap & ); |
47 | void regionUpdated( const QRect & ); |
48 | |
49 | protected: |
50 | void paintEvent( QPaintEvent* e ); |
51 | void resizeEvent( QResizeEvent* e ); |
52 | void mousePressEvent( QMouseEvent* e ); |
53 | void mouseMoveEvent( QMouseEvent* e ); |
54 | void mouseReleaseEvent( QMouseEvent* e ); |
55 | void mouseDoubleClickEvent( QMouseEvent* ); |
56 | void keyPressEvent( QKeyEvent* e ); |
57 | void updateHandles(); |
58 | QRegion handleMask( MaskType type ) const; |
59 | QPoint limitPointToRect( const QPoint &p, const QRect &r ) const; |
60 | QRect normalizeSelection( const QRect &s ) const; |
61 | void grabRect(); |
62 | |
63 | QRect selection; |
64 | bool mouseDown; |
65 | bool newSelection; |
66 | const int handleSize; |
67 | QRect* mouseOverHandle; |
68 | QPoint dragStartPoint; |
69 | QRect selectionBeforeDrag; |
70 | bool showHelp; |
71 | bool grabbing; |
72 | |
73 | // naming convention for handles |
74 | // T top, B bottom, R Right, L left |
75 | // 2 letters: a corner |
76 | // 1 letter: the handle on the middle of the corresponding side |
77 | QRect TLHandle, TRHandle, BLHandle, BRHandle; |
78 | QRect LHandle, THandle, RHandle, BHandle; |
79 | QRect helpTextRect; |
80 | |
81 | QVector<QRect*> handles; |
82 | QPixmap pixmap; |
83 | }; |
84 | |
85 | #endif |
86 | |