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
|
#include "./iconbutton.h"
#include <c++utilities/conversion/stringbuilder.h>
#include <QKeyEvent>
#include <QStyle>
#include <QStyleOptionFocusRect>
#include <QStylePainter>
using namespace CppUtilities;
namespace QtUtilities {
/*!
* \class IconButton
* \brief A simple QAbstractButton implementation displaying a QPixmap.
*/
/*!
* \brief Constructs an icon button.
*/
IconButton::IconButton(QWidget *parent)
: QAbstractButton(parent)
{
setCursor(Qt::ArrowCursor);
setFocusPolicy(Qt::NoFocus);
}
/*!
* \brief Destroys the icon button.
*/
IconButton::~IconButton()
{
}
/*!
* \brief Creates an IconButton for the specified \a action.
* \remarks Calling this function on the same action twice with the same \a id yields the
* same instance.
*/
IconButton *IconButton::fromAction(QAction *action, std::uintptr_t id)
{
const auto propertyName = argsToString("iconButton-", id);
const auto existingIconButton = action->property(propertyName.data());
if (!existingIconButton.isNull()) {
return existingIconButton.value<IconButton *>();
}
auto *const iconButton = new IconButton;
iconButton->assignDataFromAction(action);
action->setProperty(propertyName.data(), QVariant::fromValue(iconButton));
connect(action, &QAction::changed, iconButton, &IconButton::assignDataFromActionChangedSignal);
connect(iconButton, &IconButton::clicked, action, &QAction::trigger);
return iconButton;
}
/*!
* \brief Internally called to assign data from a QAction to the icon button.
*/
void IconButton::assignDataFromActionChangedSignal()
{
assignDataFromAction(qobject_cast<const QAction *>(QObject::sender()));
}
/*!
* \brief Internally called to assign data from a QAction to the icon button.
*/
void IconButton::assignDataFromAction(const QAction *action)
{
auto const icon = action->icon();
const auto sizes = icon.availableSizes();
const auto text = action->text();
setPixmap(icon.pixmap(sizes.empty() ? defaultPixmapSize : sizes.front()));
setToolTip(text.isEmpty() ? action->toolTip() : text);
}
QSize IconButton::sizeHint() const
{
#if QT_VERSION >= 0x050100
const qreal pixmapRatio = m_pixmap.devicePixelRatio();
#else
const qreal pixmapRatio = 1.0;
#endif
return QSize(static_cast<int>(m_pixmap.width() / pixmapRatio), static_cast<int>(m_pixmap.height() / pixmapRatio));
}
void IconButton::paintEvent(QPaintEvent *)
{
#if QT_VERSION >= 0x050100
const qreal pixmapRatio = m_pixmap.devicePixelRatio();
#else
const qreal pixmapRatio = 1.0;
#endif
auto painter = QStylePainter(this);
auto pixmapRect = QRect(0, 0, static_cast<int>(m_pixmap.width() / pixmapRatio), static_cast<int>(m_pixmap.height() / pixmapRatio));
pixmapRect.moveCenter(rect().center());
painter.drawPixmap(pixmapRect, m_pixmap);
if (hasFocus()) {
auto focusOption = QStyleOptionFocusRect();
focusOption.initFrom(this);
focusOption.rect = pixmapRect;
#ifdef Q_OS_MAC
focusOption.rect.adjust(-4, -4, 4, 4);
painter.drawControl(QStyle::CE_FocusFrame, focusOption);
#else
painter.drawPrimitive(QStyle::PE_FrameFocusRect, focusOption);
#endif
}
}
void IconButton::keyPressEvent(QKeyEvent *event)
{
QAbstractButton::keyPressEvent(event);
if (!event->modifiers() && (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return)) {
click();
}
event->accept();
}
void IconButton::keyReleaseEvent(QKeyEvent *event)
{
QAbstractButton::keyReleaseEvent(event);
event->accept();
}
} // namespace QtUtilities
|
