void TestArcTo::paintEvent(QPaintEvent *) {
讯享网QRect rect(</span><span style="color: rgba(128, 0, 128, 1)">30</span>, <span style="color: rgba(128, 0, 128, 1)">30</span>, <span style="color: rgba(128, 0, 128, 1)">200</span>, <span style="color: rgba(128, 0, 128, 1)">200</span><span style="color: rgba(0, 0, 0, 1)">); QPainter p(</span><span style="color: rgba(0, 0, 255, 1)">this</span><span style="color: rgba(0, 0, 0, 1)">); p.setRenderHint(QPainter::Antialiasing); p.fillRect(rect, QColor(</span><span style="color: rgba(128, 0, 128, 1)">255</span>, <span style="color: rgba(128, 0, 128, 1)">255</span>, <span style="color: rgba(128, 0, 128, 1)">0</span><span style="color: rgba(0, 0, 0, 1)">)); </span><span style="color: rgba(0, 0, 255, 1)">int</span> cornerSize = <span style="color: rgba(128, 0, 128, 1)">50</span>; <span style="color: rgba(0, 128, 0, 1)">//</span><span style="color: rgba(0, 128, 0, 1)">调节圆角的大小</span> <span style="color: rgba(0, 0, 255, 1)">int</span> arcR = cornerSize/<span style="color: rgba(128, 0, 128, 1)">2</span><span style="color: rgba(0, 0, 0, 1)">; QPainterPath path; path.moveTo(rect.left() </span>+<span style="color: rgba(0, 0, 0, 1)"> arcR, rect.top()); path.arcTo(rect.left(), rect.top(), cornerSize, cornerSize, </span><span style="color: rgba(128, 0, 128, 1)">90.0f</span>, <span style="color: rgba(128, 0, 128, 1)">90.0f</span><span style="color: rgba(0, 0, 0, 1)">); path.lineTo(rect.left(), rect.bottom() </span>-<span style="color: rgba(0, 0, 0, 1)"> arcR); path.arcTo(rect.left(), rect.bottom() </span>- cornerSize, cornerSize, cornerSize, <span style="color: rgba(128, 0, 128, 1)">180.0f</span>, <span style="color: rgba(128, 0, 128, 1)">90.0f</span><span style="color: rgba(0, 0, 0, 1)">); path.lineTo(rect.right() </span>-<span style="color: rgba(0, 0, 0, 1)"> arcR, rect.bottom()); path.arcTo(rect.right() </span>- cornerSize, rect.bottom() - cornerSize, cornerSize, cornerSize, <span style="color: rgba(128, 0, 128, 1)">270.0f</span>, <span style="color: rgba(128, 0, 128, 1)">90.0f</span><span style="color: rgba(0, 0, 0, 1)">); path.lineTo(rect.right(), rect.top() </span>+<span style="color: rgba(0, 0, 0, 1)"> arcR); path.arcTo(rect.right() </span>- cornerSize, rect.top(), cornerSize, cornerSize, <span style="color: rgba(128, 0, 128, 1)">0.0f</span>, <span style="color: rgba(128, 0, 128, 1)">90.0f</span><span style="color: rgba(0, 0, 0, 1)">); p.fillPath(path, QBrush(QColor(</span><span style="color: rgba(128, 0, 128, 1)">122</span>, <span style="color: rgba(128, 0, 128, 1)">122</span>, <span style="color: rgba(128, 0, 128, 1)">122</span><span style="color: rgba(0, 0, 0, 1)">)));}
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