QT里沒有相應統計圖形的繪制組件
只有手工自己畫
效果如圖
void aaq::paintEvent( QPaintEvent* ev ) { QPainter painter(this); // 去除畫筆 painter.setPen(Qt::NoPen); // 設置反鋸齒 painter.setRenderHint(QPainter::Antialiasing); //******************************************** 圓餅圖 *****************************************// if(1) { // 頂層圓面 QRectF rect_top(10.0, 20.0, 280.0, 160.0); // 底層圓面 QRectF rect_bottom(10.0, 60.0, 280.0, 160.0); // 中間矩形 QRectF rect_midd(10.0, 100.0, 280.0, 40.0); // 扇形起始角度 int startAngle = 230 * 16; // 扇形覆蓋范圍 int spanAngle = 60 * 16; painter.setBrush(QColor(97,35,35,255)); // 繪制底層圓面 painter.drawEllipse(rect_bottom); // 繪制中間矩形 painter.drawRect(rect_midd); painter.setBrush(QColor(Qt::darkYellow)); // 繪制底層扇形 painter.drawPie(rect_bottom, startAngle, spanAngle); // 扇形的弦與弧的交點 double pi = 3.1415926; double dx1 = rect_top.width() * 0.5 * cos(230 * pi / 180); double dy1 = rect_top.height() * 0.5 * sin(230 * pi / 180); double dx2 = rect_top.width() * 0.5 * cos(290 * pi / 180); double dy2 = rect_top.height() * 0.5 * sin(290 * pi / 180); // 求交點的坐標值 QPointF posBackCenter = QPointF(rect_top.center()); double dX1 = posBackCenter.x() + dx1 + 0.5; double dY1 = posBackCenter.y() - dy1 + 0.5; double dX2 = posBackCenter.x() + dx2 + 0.5; double dY2 = posBackCenter.y() - dy2 + 0.5; // 記錄交點 QPointF topLeft = QPointF(dX1, dY1); QPointF bottomRight = QPointF(dX2, dY2) + QPointF(0,40); QPointF bottomLeft = topLeft + QPointF(0,40); painter.setBrush(QColor(Qt::darkYellow)); // 繪制連接扇形的區域 QPolygonF path; path << topLeft << QPointF(dX2,dY2) << bottomRight << bottomLeft; painter.drawPolygon(path); // 繪制頂層圓面 painter.setBrush(QColor(156,56,56,255)); painter.drawEllipse(rect_top); // 繪制頂層扇形 painter.setBrush(QColor(Qt::yellow)); painter.drawPie(rect_top, startAngle, spanAngle); } QWidget::paintEvent(ev); }
http://blog.csdn.net/u013007900/article/details/50058837