obs-studio/UI/locked-checkbox.cpp

#include <QPaintEvent>
#include <QPixmap>
#include <QPainter>
#include "locked-checkbox.hpp"

#include <util/c99defs.h>

LockedCheckBox::LockedCheckBox() : QCheckBox()
{
	QString lockedFile;
	QString unlockedFile;
	if (devicePixelRatio() >= 2) {
		lockedFile = ":/res/images/locked_mask_2x.png";
		unlockedFile = ":/res/images/unlocked_mask_2x.png";
	} else {
		lockedFile = ":/res/images/locked_mask.png";
		unlockedFile = ":/res/images/unlocked_mask.png";
	}
	lockedImage = QPixmap::fromImage(QImage(lockedFile));
	unlockedImage = QPixmap::fromImage(QImage(unlockedFile));
	setMinimumSize(16, 16);

	setStyleSheet("outline: none;");
}

void LockedCheckBox::paintEvent(QPaintEvent *event)
{
	UNUSED_PARAMETER(event);

	QPixmap &pixmap = isChecked() ? lockedImage : unlockedImage;
	QImage image(pixmap.size(), QImage::Format_ARGB32);

	QPainter draw(&image);
	draw.setCompositionMode(QPainter::CompositionMode_Source);
	draw.drawPixmap(0, 0, pixmap.width(), pixmap.height(), pixmap);
	draw.setCompositionMode(QPainter::CompositionMode_SourceIn);
	draw.fillRect(QRectF(QPointF(0.0f, 0.0f), pixmap.size()),
			palette().color(foregroundRole()));

	QPainter p(this);
	p.drawPixmap(0, 0, 16, 16, QPixmap::fromImage(image));
}