98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
#include <QtWidgets>
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class DashboardWidget : public QWidget {
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public:
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DashboardWidget(QWidget *parent = nullptr) : QWidget(parent) {
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currentValue = 0;//NG占比
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showText = "100%";
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setMinimumSize(80, 80);
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setMaximumSize(100, 100);
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}
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void setCurrentPercentage(int value) {
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if (value*3.6 != currentValue) {
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currentValue = value*3.6;
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showText = QString::number(100-value) + "%";
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update();
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}
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}
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//void setCurrentValue(int value) {
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// if (value != currentValue) {
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// currentValue = value;
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// showText = QString::number((360-value)/360)+ "%";
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// update();
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// }
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//}
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protected:
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void paintEvent(QPaintEvent* event) override {
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int startAngle = 90;
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int endAngle = currentValue+ startAngle-1;
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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painter.setRenderHint(QPainter::TextAntialiasing);
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int side = qMin(width(), height());
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// 绘制外框
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painter.setPen(QPen(QColor(255, 255, 255), 2));
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painter.setBrush(Qt::NoBrush);
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painter.drawEllipse(width() / 2 - side / 2 + 1, height() / 2 - side / 2 + 1, side - 2, side - 2);
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// 绘制指针
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painter.save();
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painter.translate(width() / 2, height() / 2);
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painter.rotate(currentValue); // 假设每个刻度代表10个单位，360度/10 = 36度
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// 绘制顺时针渐变绿色区域
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QRadialGradient greenGradient(QPointF(0, 0), side / 2);
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greenGradient.setColorAt(0.70, Qt::transparent);
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greenGradient.setColorAt(0.96, QColor(76, 255, 76));
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greenGradient.setColorAt(1, QColor(76 ,255,76));
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painter.setPen(QPen(Qt::transparent, 20));
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painter.setBrush(greenGradient);
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painter.drawEllipse(QPointF(0, 0), side / 2-2, side / 2-2);
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// 绘制逆时针渐变红色区域
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if (currentValue > 0) {
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QRadialGradient redGradient(QPointF(0, 0), side / 2);
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redGradient.setColorAt(0.80, Qt::transparent);
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redGradient.setColorAt(0.80, QColor(255, 76, 76));
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redGradient.setColorAt(1, QColor(255, 76, 76));
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painter.setPen(QPen(Qt::transparent, 20));
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painter.setBrush(redGradient);
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painter.drawPie(QRectF(-side / 2+2, -side / 2+2, side -4, side-4), startAngle * 16, (endAngle - startAngle) * 16);
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}
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// 使用渐变来绘制指针
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QLinearGradient gradient(QPointF(-2, -side / 2), QPointF(2, -side / 2 ));
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gradient.setColorAt(0, Qt::transparent);
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gradient.setColorAt(0.8, Qt::white);
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gradient.setColorAt(1, Qt::white);
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painter.setPen(QPen(Qt::transparent, 3));
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painter.setBrush(gradient);
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painter.drawConvexPolygon(QPolygonF() << QPointF(-2, -side / 2) << QPointF(2, -side / 2) << QPointF(0, -side / 2 + 40));
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painter.restore();
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// 显示当前值
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QFont font("Impact", 24, QFont::Bold);
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font.setStretch(130);
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painter.setPen(Qt::white);
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painter.setFont(font);
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painter.drawText(QRect(2,-2, side, side), Qt::AlignCenter, showText);
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}
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private:
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double currentValue;
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QString Title;
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QString showText;
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};
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#pragma once |