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