1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Extras module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qquickcircularprogressbar_p.h"
#include <QtGui/QPen>
#include <QtGui/QPainter>
#include <QtMath>
QQuickCircularProgressBar::QQuickCircularProgressBar(QQuickItem *parent) :
QQuickPaintedItem(parent),
mProgress(0),
mBarWidth(1),
mInset(0),
mBackgroundColor(QColor(Qt::transparent)),
mMinimumValueAngle(-90 * 16),
mMaximumValueAngle(-450 * 16)
{
setFlag(ItemHasContents, true);
}
QQuickCircularProgressBar::~QQuickCircularProgressBar()
{
}
void QQuickCircularProgressBar::paint(QPainter *painter)
{
QPen pen(Qt::red);
pen.setWidthF(mBarWidth);
const QRectF bounds = boundingRect();
const qreal smallest = qMin(bounds.width(), bounds.height());
QRectF rect = QRectF(pen.widthF() / 2.0, pen.widthF() / 2.0, smallest - pen.widthF(), smallest - pen.widthF());
rect.adjust(mInset, mInset, -mInset, -mInset);
// Make sure the arc is aligned to whole pixels.
if (rect.x() - int(rect.x()) > 0) {
rect.setX(qCeil(rect.x()));
}
if (rect.y() - int(rect.y()) > 0) {
rect.setY(qCeil(rect.y()));
}
if (rect.width() - int(rect.width()) > 0) {
rect.setWidth(qFloor(rect.width()));
}
if (rect.height() - int(rect.height()) > 0) {
rect.setHeight(qFloor(rect.height()));
}
painter->setRenderHint(QPainter::Antialiasing);
// QPainter::drawArc uses positive values for counter clockwise - the opposite of our API -
// so we must reverse the angles with * -1. Also, our angle origin is at 12 o'clock, whereas
// QPainter's is 3 o'clock, hence - 90.
const qreal startAngle = ((mMinimumValueAngle - 90) * -1) * 16;
if (mBackgroundColor != Qt::transparent) {
QBrush bgBrush(mBackgroundColor);
QPen bgPen;
bgPen.setWidthF(mBarWidth);
bgPen.setBrush(bgBrush);
painter->setPen(bgPen);
painter->drawArc(rect, startAngle, (((mMaximumValueAngle - 90) * -1 * 16) - startAngle));
}
QLinearGradient gradient;
gradient.setStart(bounds.width() / 2, mInset);
gradient.setFinalStop(bounds.width() / 2, bounds.height() - mInset);
gradient.setStops(mGradientStops);
QBrush brush(gradient);
pen.setBrush(brush);
painter->setPen(pen);
const qreal spanAngle = progress() * (((mMaximumValueAngle - 90) * -1 * 16) - startAngle);
painter->drawArc(rect, startAngle, spanAngle);
}
qreal QQuickCircularProgressBar::progress() const
{
return mProgress;
}
void QQuickCircularProgressBar::setProgress(qreal progress)
{
if (mProgress != progress) {
mProgress = progress;
emit progressChanged(mProgress);
update();
}
}
qreal QQuickCircularProgressBar::barWidth() const
{
return mBarWidth;
}
void QQuickCircularProgressBar::setBarWidth(qreal barWidth)
{
if (mBarWidth != barWidth) {
mBarWidth = barWidth;
emit barWidthChanged(mBarWidth);
update();
}
}
qreal QQuickCircularProgressBar::inset() const
{
return mInset;
}
void QQuickCircularProgressBar::setInset(qreal inset)
{
if (mInset != inset) {
mInset = inset;
emit insetChanged(mInset);
update();
}
}
qreal QQuickCircularProgressBar::minimumValueAngle() const
{
return mMinimumValueAngle;
}
void QQuickCircularProgressBar::setMinimumValueAngle(qreal minimumValueAngle)
{
if (mMinimumValueAngle != minimumValueAngle) {
mMinimumValueAngle = minimumValueAngle;
emit minimumValueAngleChanged(mMinimumValueAngle);
update();
}
}
qreal QQuickCircularProgressBar::maximumValueAngle() const
{
return mMinimumValueAngle;
}
void QQuickCircularProgressBar::setMaximumValueAngle(qreal maximumValueAngle)
{
if (mMaximumValueAngle != maximumValueAngle) {
mMaximumValueAngle = maximumValueAngle;
emit maximumValueAngleChanged(mMaximumValueAngle);
update();
}
}
void QQuickCircularProgressBar::clearStops()
{
mGradientStops.clear();
}
void QQuickCircularProgressBar::addStop(qreal position, const QColor &color)
{
mGradientStops.append(QGradientStop(position, color));
}
void QQuickCircularProgressBar::redraw()
{
update();
}
QColor QQuickCircularProgressBar::backgroundColor() const
{
return mBackgroundColor;
}
void QQuickCircularProgressBar::setBackgroundColor(const QColor &backgroundColor)
{
if (mBackgroundColor != backgroundColor) {
mBackgroundColor = backgroundColor;
emit backgroundColorChanged(backgroundColor);
update();
}
}
|
