iconpreviewarea.cpp Example File

widgets/icons/iconpreviewarea.cpp
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#include <QtWidgets> #include "iconpreviewarea.h" IconPreviewArea::IconPreviewArea(QWidget *parent) : QWidget(parent) { QGridLayout *mainLayout = new QGridLayout(this); for (int row = 0; row < NumStates; ++row) { stateLabels[row] = createHeaderLabel(IconPreviewArea::iconStateNames().at(row)); mainLayout->addWidget(stateLabels[row], row + 1, 0); } Q_ASSERT(NumStates == 2); for (int column = 0; column < NumModes; ++column) { modeLabels[column] = createHeaderLabel(IconPreviewArea::iconModeNames().at(column)); mainLayout->addWidget(modeLabels[column], 0, column + 1); } Q_ASSERT(NumModes == 4); for (int column = 0; column < NumModes; ++column) { for (int row = 0; row < NumStates; ++row) { pixmapLabels[column][row] = createPixmapLabel(); mainLayout->addWidget(pixmapLabels[column][row], row + 1, column + 1); } } } #ifdef Q_COMPILER_INITIALIZER_LISTS QVector<QIcon::Mode> IconPreviewArea::iconModes() { static const QVector<QIcon::Mode> result = {QIcon::Normal, QIcon::Active, QIcon::Disabled, QIcon::Selected}; return result; } QVector<QIcon::State> IconPreviewArea::iconStates() { static const QVector<QIcon::State> result = {QIcon::Off, QIcon::On}; return result; } QStringList IconPreviewArea::iconModeNames() { static const QStringList result = {tr("Normal"), tr("Active"), tr("Disabled"), tr("Selected")}; return result; } QStringList IconPreviewArea::iconStateNames() { static const QStringList result = {tr("Off"), tr("On")}; return result; } #else // Q_COMPILER_INITIALIZER_LISTS QVector<QIcon::Mode> IconPreviewArea::iconModes() { static QVector<QIcon::Mode> result; if (result.isEmpty()) result << QIcon::Normal << QIcon::Active << QIcon::Disabled << QIcon::Selected; return result; } QVector<QIcon::State> IconPreviewArea::iconStates() { static QVector<QIcon::State> result; if (result.isEmpty()) result << QIcon::Off << QIcon::On; return result; } QStringList IconPreviewArea::iconModeNames() { static QStringList result; if (result.isEmpty()) result << tr("Normal") << tr("Active") << tr("Disabled") << tr("Selected"); return result; } QStringList IconPreviewArea::iconStateNames() { static QStringList result; if (result.isEmpty()) result << tr("Off") << tr("On"); return result; } #endif // !Q_COMPILER_INITIALIZER_LISTS void IconPreviewArea::setIcon(const QIcon &icon) { this->icon = icon; updatePixmapLabels(); } void IconPreviewArea::setSize(const QSize &size) { if (size != this->size) { this->size = size; updatePixmapLabels(); } } QLabel *IconPreviewArea::createHeaderLabel(const QString &text) { QLabel *label = new QLabel(tr("<b>%1</b>").arg(text)); label->setAlignment(Qt::AlignCenter); return label; } QLabel *IconPreviewArea::createPixmapLabel() { QLabel *label = new QLabel; label->setEnabled(false); label->setAlignment(Qt::AlignCenter); label->setFrameShape(QFrame::Box); label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); label->setBackgroundRole(QPalette::Base); label->setAutoFillBackground(true); label->setMinimumSize(132, 132); return label; } void IconPreviewArea::updatePixmapLabels() { QWindow *window = Q_NULLPTR; if (const QWidget *nativeParent = nativeParentWidget()) window = nativeParent->windowHandle(); for (int column = 0; column < NumModes; ++column) { for (int row = 0; row < NumStates; ++row) { const QPixmap pixmap = icon.pixmap(window, size, IconPreviewArea::iconModes().at(column), IconPreviewArea::iconStates().at(row)); QLabel *pixmapLabel = pixmapLabels[column][row]; pixmapLabel->setPixmap(pixmap); pixmapLabel->setEnabled(!pixmap.isNull()); QString toolTip; if (!pixmap.isNull()) { const QSize actualSize = icon.actualSize(size); toolTip = tr("Size: %1x%2\nActual size: %3x%4\nDevice pixel ratio: %5") .arg(size.width()).arg(size.height()) .arg(actualSize.width()).arg(actualSize.height()) .arg(pixmap.devicePixelRatioF()); } pixmapLabel->setToolTip(toolTip); } } }