1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the QtWidgets module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 3 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 3 requirements
23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24 **
25 ** GNU General Public License Usage
26 ** Alternatively, this file may be used under the terms of the GNU
27 ** General Public License version 2.0 or (at your option) the GNU General
28 ** Public license version 3 or any later version approved by the KDE Free
29 ** Qt Foundation. The licenses are as published by the Free Software
30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31 ** included in the packaging of this file. Please review the following
32 ** information to ensure the GNU General Public License requirements will
33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34 ** https://www.gnu.org/licenses/gpl-3.0.html.
35 **
36 ** $QT_END_LICENSE$
37 **
38 ****************************************************************************/
39 
40 #ifndef QSTYLEANIMATION_P_H
41 #define QSTYLEANIMATION_P_H
42 
43 #include <QtWidgets/private/qtwidgetsglobal_p.h>
44 #include "qabstractanimation.h"
45 #include "qdatetime.h"
46 #include "qimage.h"
47 
48 QT_REQUIRE_CONFIG(animation);
49 
50 QT_BEGIN_NAMESPACE
51 
52 //
53 //  W A R N I N G
54 //  -------------
55 //
56 // This file is not part of the Qt API. It exists for the convenience of
57 // qcommonstyle.cpp.  This header file may change from version to version
58 // without notice, or even be removed.
59 //
60 // We mean it.
61 //
62 
63 class Q_WIDGETS_EXPORT QStyleAnimation : public QAbstractAnimation
64 {
65     Q_OBJECT
66 
67 public:
68     QStyleAnimation(QObject *target);
69     virtual ~QStyleAnimation();
70 
71     QObject *target() const;
72 
73     int duration() const override;
74     void setDuration(int duration);
75 
76     int delay() const;
77     void setDelay(int delay);
78 
79     QTime startTime() const;
80     void setStartTime(const QTime &time);
81 
82     enum FrameRate {
83         DefaultFps,
84         SixtyFps,
85         ThirtyFps,
86         TwentyFps,
87         FifteenFps
88     };
89 
90     FrameRate frameRate() const;
91     void setFrameRate(FrameRate fps);
92 
93     void updateTarget();
94 
95 public Q_SLOTS:
96     void start();
97 
98 protected:
99     virtual bool isUpdateNeeded() const;
100     virtual void updateCurrentTime(int time) override;
101 
102 private:
103     int _delay;
104     int _duration;
105     QTime _startTime;
106     FrameRate _fps;
107     int _skip;
108 };
109 
110 class Q_WIDGETS_EXPORT QProgressStyleAnimation : public QStyleAnimation
111 {
112     Q_OBJECT
113 
114 public:
115     QProgressStyleAnimation(int speed, QObject *target);
116 
117     int animationStep() const;
118     int progressStep(int width) const;
119 
120     int speed() const;
121     void setSpeed(int speed);
122 
123 protected:
124     bool isUpdateNeeded() const override;
125 
126 private:
127     int _speed;
128     mutable int _step;
129 };
130 
131 class Q_WIDGETS_EXPORT QNumberStyleAnimation : public QStyleAnimation
132 {
133     Q_OBJECT
134 
135 public:
136     QNumberStyleAnimation(QObject *target);
137 
138     qreal startValue() const;
139     void setStartValue(qreal value);
140 
141     qreal endValue() const;
142     void setEndValue(qreal value);
143 
144     qreal currentValue() const;
145 
146 protected:
147     bool isUpdateNeeded() const override;
148 
149 private:
150     qreal _start;
151     qreal _end;
152     mutable qreal _prev;
153 };
154 
155 class Q_WIDGETS_EXPORT QBlendStyleAnimation : public QStyleAnimation
156 {
157     Q_OBJECT
158 
159 public:
160     enum Type { Transition, Pulse };
161 
162     QBlendStyleAnimation(Type type, QObject *target);
163 
164     QImage startImage() const;
165     void setStartImage(const QImage& image);
166 
167     QImage endImage() const;
168     void setEndImage(const QImage& image);
169 
170     QImage currentImage() const;
171 
172 protected:
173     virtual void updateCurrentTime(int time) override;
174 
175 private:
176     Type _type;
177     QImage _start;
178     QImage _end;
179     QImage _current;
180 };
181 
182 class Q_WIDGETS_EXPORT QScrollbarStyleAnimation : public QNumberStyleAnimation
183 {
184     Q_OBJECT
185 
186 public:
187     enum Mode { Activating, Deactivating };
188 
189     QScrollbarStyleAnimation(Mode mode, QObject *target);
190 
191     Mode mode() const;
192 
193     bool wasActive() const;
194     void setActive(bool active);
195 
196 private slots:
197     void updateCurrentTime(int time) override;
198 
199 private:
200     Mode _mode;
201     bool _active;
202 };
203 
204 QT_END_NAMESPACE
205 
206 #endif // QSTYLEANIMATION_P_H
207