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50
51#include "iconpreviewarea.h"
52
53#include <QGridLayout>
54#include <QLabel>
55
56//! [0]
57IconPreviewArea::IconPreviewArea(QWidget *parent)
58 : QWidget(parent)
59{
60 QGridLayout *mainLayout = new QGridLayout(this);
61
62 for (int row = 0; row < NumStates; ++row) {
63 stateLabels[row] = createHeaderLabel(text: IconPreviewArea::iconStateNames().at(i: row));
64 mainLayout->addWidget(stateLabels[row], row: row + 1, column: 0);
65 }
66 Q_ASSERT(NumStates == 2);
67
68 for (int column = 0; column < NumModes; ++column) {
69 modeLabels[column] = createHeaderLabel(text: IconPreviewArea::iconModeNames().at(i: column));
70 mainLayout->addWidget(modeLabels[column], row: 0, column: column + 1);
71 }
72 Q_ASSERT(NumModes == 4);
73
74 for (int column = 0; column < NumModes; ++column) {
75 for (int row = 0; row < NumStates; ++row) {
76 pixmapLabels[column][row] = createPixmapLabel();
77 mainLayout->addWidget(pixmapLabels[column][row], row: row + 1, column: column + 1);
78 }
79 }
80}
81//! [0]
82
83//! [42]
84QVector<QIcon::Mode> IconPreviewArea::iconModes()
85{
86 static const QVector<QIcon::Mode> result = {QIcon::Normal, QIcon::Active, QIcon::Disabled, QIcon::Selected};
87 return result;
88}
89
90QVector<QIcon::State> IconPreviewArea::iconStates()
91{
92 static const QVector<QIcon::State> result = {QIcon::Off, QIcon::On};
93 return result;
94}
95
96QStringList IconPreviewArea::iconModeNames()
97{
98 static const QStringList result = {tr(s: "Normal"), tr(s: "Active"), tr(s: "Disabled"), tr(s: "Selected")};
99 return result;
100}
101
102QStringList IconPreviewArea::iconStateNames()
103{
104 static const QStringList result = {tr(s: "Off"), tr(s: "On")};
105 return result;
106}
107//! [42]
108
109//! [1]
110void IconPreviewArea::setIcon(const QIcon &icon)
111{
112 this->icon = icon;
113 updatePixmapLabels();
114}
115//! [1]
116
117//! [2]
118void IconPreviewArea::setSize(const QSize &size)
119{
120 if (size != this->size) {
121 this->size = size;
122 updatePixmapLabels();
123 }
124}
125//! [2]
126
127//! [3]
128QLabel *IconPreviewArea::createHeaderLabel(const QString &text)
129{
130 QLabel *label = new QLabel(tr(s: "<b>%1</b>").arg(a: text));
131 label->setAlignment(Qt::AlignCenter);
132 return label;
133}
134//! [3]
135
136//! [4]
137QLabel *IconPreviewArea::createPixmapLabel()
138{
139 QLabel *label = new QLabel;
140 label->setEnabled(false);
141 label->setAlignment(Qt::AlignCenter);
142 label->setFrameShape(QFrame::Box);
143 label->setSizePolicy(hor: QSizePolicy::Expanding, ver: QSizePolicy::Expanding);
144 label->setBackgroundRole(QPalette::Base);
145 label->setAutoFillBackground(true);
146 label->setMinimumSize(minw: 132, minh: 132);
147 return label;
148}
149//! [4]
150
151//! [5]
152void IconPreviewArea::updatePixmapLabels()
153{
154 QWindow *window = nullptr;
155 if (const QWidget *nativeParent = nativeParentWidget())
156 window = nativeParent->windowHandle();
157 for (int column = 0; column < NumModes; ++column) {
158 for (int row = 0; row < NumStates; ++row) {
159 const QPixmap pixmap =
160 icon.pixmap(window, size, mode: IconPreviewArea::iconModes().at(i: column),
161 state: IconPreviewArea::iconStates().at(i: row));
162 QLabel *pixmapLabel = pixmapLabels[column][row];
163 pixmapLabel->setPixmap(pixmap);
164 pixmapLabel->setEnabled(!pixmap.isNull());
165 QString toolTip;
166 if (!pixmap.isNull()) {
167 const QSize actualSize = icon.actualSize(size);
168 toolTip =
169 tr(s: "Size: %1x%2\nActual size: %3x%4\nDevice pixel ratio: %5")
170 .arg(a: size.width()).arg(a: size.height())
171 .arg(a: actualSize.width()).arg(a: actualSize.height())
172 .arg(a: pixmap.devicePixelRatioF());
173 }
174 pixmapLabel->setToolTip(toolTip);
175 }
176 }
177}
178//! [5]
179

source code of qtbase/examples/widgets/widgets/icons/iconpreviewarea.cpp