60 lines
1.5 KiB
C++
60 lines
1.5 KiB
C++
#include "monitorItemPreviewDlg.h"
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#include <QPainter>
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MonitorItemPreviewDlg::MonitorItemPreviewDlg(QWidget* parent)
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: QWidget(parent)
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{
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initial();
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}
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MonitorItemPreviewDlg::~MonitorItemPreviewDlg()
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{
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}
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void MonitorItemPreviewDlg::initial()
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{
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}
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void MonitorItemPreviewDlg::setSvgFile(const QByteArray &bytSvg)
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{
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m_renderer.load(bytSvg);
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_curSvg = bytSvg;
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update(); // 触发重绘
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}
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void MonitorItemPreviewDlg::setColors(const QColor &color)
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{
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m_Color = color;
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update();
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}
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void MonitorItemPreviewDlg::paintEvent(QPaintEvent *) {
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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// 1. 先将SVG渲染到一个透明图像上作为遮罩
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QImage maskImage(size(), QImage::Format_ARGB32);
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maskImage.fill(Qt::transparent);
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QPainter maskPainter(&maskImage);
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m_renderer.render(&maskPainter);
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maskPainter.end();
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// 2. 使用目标颜色填充，但只在SVG的非透明区域显示
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painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
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for (int y = 0; y < maskImage.height(); ++y) {
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for (int x = 0; x < maskImage.width(); ++x) {
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QRgb pixel = maskImage.pixel(x, y);
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if (qAlpha(pixel) > 0) { // 只处理非透明像素
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// 保持原始透明度，只改变颜色
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QColor newColor = m_Color;
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newColor.setAlpha(qAlpha(pixel)); // 保持原始alpha值
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painter.fillRect(x, y, 1, 1, newColor);
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}
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}
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}
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}
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