2025年qpainter绘制图片（QPainter绘制图片）

科技前沿 • 2025-04-26 15:35 • 阅读 69
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void 类名::paintEvent(QPaintEvent * event) {
讯享网 讯享网Q_UNUSED(</span><span style="color: rgba(0, 0, 255, 1)">event</span><span style="color: rgba(0, 0, 0, 1)">); QPainter painter(</span><span style="color: rgba(0, 0, 255, 1)">this</span><span style="color: rgba(0, 0, 0, 1)">); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 设置画笔颜色</span> painter.setPen(QColor(<span style="color: rgba(128, 0, 128, 1)">0</span>, <span style="color: rgba(128, 0, 128, 1)">160</span>, <span style="color: rgba(128, 0, 128, 1)">230</span><span style="color: rgba(0, 0, 0, 1)">)); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 反走样</span> painter.setRenderHint(QPainter::Antialiasing, <span style="color: rgba(0, 0, 255, 1)">true</span><span style="color: rgba(0, 0, 0, 1)">); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 设置画笔颜色</span> painter.setPen(QPen(QColor(<span style="color: rgba(128, 0, 128, 1)">192</span>,<span style="color: rgba(128, 0, 128, 1)">192</span>,<span style="color: rgba(128, 0, 128, 1)">192</span>), <span style="color: rgba(128, 0, 128, 1)">2</span><span style="color: rgba(0, 0, 0, 1)">)); </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">各点坐标</span> QPointF points[<span style="color: rgba(128, 0, 128, 1)">4</span>] = {(<span style="color: rgba(128, 0, 128, 1)">10</span>,<span style="color: rgba(128, 0, 128, 1)">20</span>) ,(<span style="color: rgba(128, 0, 128, 1)">10</span>, <span style="color: rgba(128, 0, 128, 1)">40</span>), (<span style="color: rgba(128, 0, 128, 1)">40</span>,<span style="color: rgba(128, 0, 128, 1)">80</span>), (<span style="color: rgba(128, 0, 128, 1)">40</span>, <span style="color: rgba(128, 0, 128, 1)">50</span><span style="color: rgba(0, 0, 0, 1)">)}; </span><span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)"> 绘制多边形</span> painters.drawPolygon(points, <span style="color: rgba(128, 0, 128, 1)">4</span><span style="color: rgba(0, 0, 0, 1)">); 
 }
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2025年qpainter绘制图片（QPainter绘制图片）

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