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#include "waveform/waveformmarklabel.h"
#include "util/math.h"
void WaveformMarkLabel::prerender(QPointF bottomLeft,
const QPixmap& icon,
QString text,
const QFont& font,
QColor textColor,
QColor backgroundColor,
float widgetWidth,
double scaleFactor) {
if (text.isEmpty() && icon.isNull()) {
clear();
return;
}
m_text = text;
QFontMetrics fontMetrics(font);
const int padding = 2;
QRectF pixmapRect;
pixmapRect = fontMetrics.boundingRect(text);
float availableWidthForText;
if (icon.isNull()) {
pixmapRect.setWidth(padding + pixmapRect.width() + padding);
availableWidthForText = widgetWidth - padding * 2;
} else {
pixmapRect.setWidth(padding + icon.width() + padding + pixmapRect.width() + padding);
availableWidthForText = widgetWidth - padding * 3;
}
// Elide extremely long labels
if (pixmapRect.width() > widgetWidth) {
text = fontMetrics.elidedText(
text, Qt::ElideRight, static_cast<int>(availableWidthForText));
pixmapRect.setWidth(widgetWidth);
}
pixmapRect.setHeight(math_max(fontMetrics.height(), icon.height()));
// pixmapRect has a top left of (0,0) for rendering to m_pixmap.
// m_areaRect is the same size but shifted to the coordinates of the widget.
m_areaRect = pixmapRect;
QPointF topLeft = QPointF(bottomLeft.x(),
bottomLeft.y() - pixmapRect.height());
m_areaRect.moveTo(topLeft);
if (m_areaRect.right() > widgetWidth) {
m_areaRect.setLeft(widgetWidth - m_areaRect.width());
}
m_pixmap = QPixmap(static_cast<int>(pixmapRect.width() * scaleFactor),
static_cast<int>(pixmapRect.height() * scaleFactor));
m_pixmap.setDevicePixelRatio(scaleFactor);
m_pixmap.fill(Qt::transparent);
QPainter painter(&m_pixmap);
painter.setPen(QColor(Qt::transparent));
painter.setBrush(QBrush(backgroundColor));
painter.drawRoundedRect(QRectF(0, 0, pixmapRect.width(), pixmapRect.height()), 2.0, 2.0);
if (!icon.isNull()) {
QPointF iconTopLeft = pixmapRect.topLeft();
iconTopLeft.setX(iconTopLeft.x() + padding);
painter.drawPixmap(iconTopLeft, icon);
}
if (!text.isEmpty()) {
QPointF textBottomLeft;
textBottomLeft.setX(icon.width() + padding);
textBottomLeft.setY(fontMetrics.ascent());
painter.setFont(font);
painter.setPen(textColor);
painter.drawText(textBottomLeft, text);
}
};
void WaveformMarkLabel::draw(QPainter* pPainter) {
pPainter->drawPixmap(m_areaRect.topLeft(), m_pixmap);
}
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