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Microprofile: DPI-aware drawing
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@ -151,6 +151,8 @@ private:
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/// This timer is used to redraw the widget's contents continuously. To save resources, it only
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/// runs while the widget is visible.
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QTimer update_timer;
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/// Scale the coordinate system appropriately when physical DPI != logical DPI.
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qreal x_scale, y_scale;
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};
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#endif
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@ -220,11 +222,17 @@ MicroProfileWidget::MicroProfileWidget(QWidget* parent) : QWidget(parent) {
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MicroProfileInitUI();
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connect(&update_timer, SIGNAL(timeout()), SLOT(update()));
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QPainter painter(this);
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x_scale = qreal(painter.device()->physicalDpiX()) / qreal(painter.device()->logicalDpiX());
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y_scale = qreal(painter.device()->physicalDpiY()) / qreal(painter.device()->logicalDpiY());
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}
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void MicroProfileWidget::paintEvent(QPaintEvent* ev) {
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QPainter painter(this);
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painter.scale(x_scale, y_scale);
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painter.setBackground(Qt::black);
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painter.eraseRect(rect());
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@ -248,24 +256,24 @@ void MicroProfileWidget::hideEvent(QHideEvent* ev) {
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}
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void MicroProfileWidget::mouseMoveEvent(QMouseEvent* ev) {
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MicroProfileMousePosition(ev->x(), ev->y(), 0);
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MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
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ev->accept();
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}
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void MicroProfileWidget::mousePressEvent(QMouseEvent* ev) {
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MicroProfileMousePosition(ev->x(), ev->y(), 0);
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MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
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MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
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ev->accept();
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}
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void MicroProfileWidget::mouseReleaseEvent(QMouseEvent* ev) {
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MicroProfileMousePosition(ev->x(), ev->y(), 0);
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MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, 0);
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MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
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ev->accept();
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}
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void MicroProfileWidget::wheelEvent(QWheelEvent* ev) {
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MicroProfileMousePosition(ev->x(), ev->y(), ev->delta() / 120);
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MicroProfileMousePosition(ev->x() / x_scale, ev->y() / y_scale, ev->delta() / 120);
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ev->accept();
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}
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