49 lines
1.7 KiB
C++
49 lines
1.7 KiB
C++
#include "IconCaption.h"
|
|
|
|
#include <QFontMetrics>
|
|
#include <QGuiApplication>
|
|
#include <QPainter>
|
|
#include <QRect>
|
|
|
|
QPixmap renderCaptionWithIcon(const QString& text, const QPixmap& icon,
|
|
const QFont& font, const QColor& textColor)
|
|
{
|
|
const QFontMetrics metrics(font);
|
|
const int textWidth = metrics.horizontalAdvance(text);
|
|
const int gap = icon.isNull() ? 0 : 6;
|
|
|
|
// The icon is drawn at the caption's device-independent pixel size; the source
|
|
// pixmap may be larger (rasterized at a target size / device pixel ratio), so
|
|
// divide by its own dpr to get its logical size.
|
|
const qreal iconDpr = icon.isNull() ? 1.0 : icon.devicePixelRatio();
|
|
const int iconW = icon.isNull() ? 0
|
|
: static_cast<int>(icon.width() / iconDpr);
|
|
const int iconH = icon.isNull() ? 0
|
|
: static_cast<int>(icon.height() / iconDpr);
|
|
|
|
const int width = textWidth + gap + iconW;
|
|
const int height = qMax(metrics.height(), iconH);
|
|
|
|
const qreal dpr = qApp ? qApp->devicePixelRatio() : 1.0;
|
|
QPixmap pixmap(static_cast<int>(width * dpr), static_cast<int>(height * dpr));
|
|
pixmap.setDevicePixelRatio(dpr);
|
|
pixmap.fill(Qt::transparent);
|
|
|
|
QPainter painter(&pixmap);
|
|
painter.setRenderHint(QPainter::Antialiasing, true);
|
|
painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
|
|
painter.setFont(font);
|
|
painter.setPen(textColor);
|
|
painter.drawText(QRect(0, 0, textWidth, height),
|
|
Qt::AlignLeft | Qt::AlignVCenter, text);
|
|
|
|
if (!icon.isNull())
|
|
{
|
|
const int iconX = textWidth + gap;
|
|
const int iconY = (height - iconH) / 2;
|
|
painter.drawPixmap(QRect(iconX, iconY, iconW, iconH), icon);
|
|
}
|
|
|
|
return pixmap;
|
|
}
|