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1 | /**************************************************************************** | ||
2 | ** $Id$ | ||
3 | ** | ||
4 | ** Definition of some shared interal classes | ||
5 | ** | ||
6 | ** Created : 010427 | ||
7 | ** | ||
8 | ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved. | ||
9 | ** | ||
10 | ** This file is part of the kernel module of the Qt GUI Toolkit. | ||
11 | ** | ||
12 | ** This file may be distributed under the terms of the Q Public License | ||
13 | ** as defined by Trolltech AS of Norway and appearing in the file | ||
14 | ** LICENSE.QPL included in the packaging of this file. | ||
15 | ** | ||
16 | ** This file may be distributed and/or modified under the terms of the | ||
17 | ** GNU General Public License version 2 as published by the Free Software | ||
18 | ** Foundation and appearing in the file LICENSE.GPL included in the | ||
19 | ** packaging of this file. | ||
20 | ** | ||
21 | ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition | ||
22 | ** licenses may use this file in accordance with the Qt Commercial License | ||
23 | ** Agreement provided with the Software. | ||
24 | ** | ||
25 | ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE | ||
26 | ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | ||
27 | ** | ||
28 | ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for | ||
29 | ** information about Qt Commercial License Agreements. | ||
30 | ** See http://www.trolltech.com/qpl/ for QPL licensing information. | ||
31 | ** See http://www.trolltech.com/gpl/ for GPL licensing information. | ||
32 | ** | ||
33 | ** Contact info@trolltech.com if any conditions of this licensing are | ||
34 | ** not clear to you. | ||
35 | ** | ||
36 | **********************************************************************/ | ||
37 | |||
38 | #ifndef QINTERNAL_P_H | ||
39 | #define QINTERNAL_P_H | ||
40 | |||
41 | // | ||
42 | // W A R N I N G | ||
43 | // ------------- | ||
44 | // | ||
45 | // This file is not part of the Qt API. It exists for the convenience | ||
46 | // of a number of Qt sources files. This header file may change from | ||
47 | // version to version without notice, or even be removed. | ||
48 | // | ||
49 | // We mean it. | ||
50 | // | ||
51 | // | ||
52 | #ifndef QT_H | ||
53 | #include <qnamespace.h> | ||
54 | #include <qrect.h> | ||
55 | #endif // QT_H | ||
56 | |||
57 | class QWidget; | ||
58 | class QPainter; | ||
59 | class QPixmap; | ||
60 | |||
61 | class Q_EXPORT QSharedDoubleBuffer | ||
62 | { | ||
63 | public: | ||
64 | enum DoubleBufferFlags { | ||
65 | NoFlags = 0x00, | ||
66 | InitBG = 0x01, | ||
67 | Force = 0x02, | ||
68 | Default = InitBG | Force | ||
69 | }; | ||
70 | typedef uint DBFlags; | ||
71 | |||
72 | QSharedDoubleBuffer( DBFlags f = Default ); | ||
73 | QSharedDoubleBuffer( QWidget* widget, | ||
74 | int x = 0, int y = 0, int w = -1, int h = -1, | ||
75 | DBFlags f = Default ); | ||
76 | QSharedDoubleBuffer( QPainter* painter, | ||
77 | int x = 0, int y = 0, int w = -1, int h = -1, | ||
78 | DBFlags f = Default ); | ||
79 | QSharedDoubleBuffer( QWidget *widget, const QRect &r, DBFlags f = Default ); | ||
80 | QSharedDoubleBuffer( QPainter *painter, const QRect &r, DBFlags f = Default ); | ||
81 | ~QSharedDoubleBuffer(); | ||
82 | |||
83 | bool begin( QWidget* widget, int x = 0, int y = 0, int w = -1, int h = -1 ); | ||
84 | bool begin( QPainter* painter, int x = 0, int y = 0, int w = -1, int h = -1); | ||
85 | bool begin( QWidget* widget, const QRect &r ); | ||
86 | bool begin( QPainter* painter, const QRect &r ); | ||
87 | bool end(); | ||
88 | |||
89 | QPainter* painter() const; | ||
90 | |||
91 | bool isActive() const; | ||
92 | bool isBuffered() const; | ||
93 | void flush(); | ||
94 | |||
95 | static bool isDisabled() { return !dblbufr; } | ||
96 | static void setDisabled( bool off ) { dblbufr = !off; } | ||
97 | |||
98 | static void cleanup(); | ||
99 | |||
100 | private: | ||
101 | enum DoubleBufferState { | ||
102 | Active = 0x0100, | ||
103 | BufferActive= 0x0200, | ||
104 | ExternalPainter= 0x0400 | ||
105 | }; | ||
106 | typedef uint DBState; | ||
107 | |||
108 | QPixmap *getPixmap(); | ||
109 | void releasePixmap(); | ||
110 | |||
111 | QWidget *wid; | ||
112 | int rx, ry, rw, rh; | ||
113 | DBFlags flags; | ||
114 | DBState state; | ||
115 | |||
116 | QPainter *p, *external_p; | ||
117 | QPixmap *pix; | ||
118 | |||
119 | static bool dblbufr; | ||
120 | }; | ||
121 | |||
122 | inline bool QSharedDoubleBuffer::begin( QWidget* widget, const QRect &r ) | ||
123 | { return begin( widget, r.x(), r.y(), r.width(), r.height() ); } | ||
124 | |||
125 | inline bool QSharedDoubleBuffer::begin( QPainter *painter, const QRect &r ) | ||
126 | { return begin( painter, r.x(), r.y(), r.width(), r.height() ); } | ||
127 | |||
128 | inline QPainter* QSharedDoubleBuffer::painter() const | ||
129 | { return p; } | ||
130 | |||
131 | inline bool QSharedDoubleBuffer::isActive() const | ||
132 | { return ( state & Active ); } | ||
133 | |||
134 | inline bool QSharedDoubleBuffer::isBuffered() const | ||
135 | { return ( state & BufferActive ); } | ||
136 | |||
137 | |||
138 | class QVirtualDestructor { | ||
139 | public: | ||
140 | virtual ~QVirtualDestructor() {} | ||
141 | }; | ||
142 | |||
143 | template <class T> | ||
144 | class QAutoDeleter : public QVirtualDestructor { | ||
145 | public: | ||
146 | QAutoDeleter( T* p ) : ptr( p ) {} | ||
147 | ~QAutoDeleter() { delete ptr; } | ||
148 | private: | ||
149 | T* ptr; | ||
150 | }; | ||
151 | |||
152 | template <class T> | ||
153 | QAutoDeleter<T>* qAutoDeleter( T* p ) | ||
154 | { | ||
155 | return new QAutoDeleter<T>( p ); | ||
156 | } | ||
157 | #endif // QINTERNAL_P_H | ||