做网站需要备案吗,青岛哪里可以建网站,wordpress 商城模板下载,有名设计网站目录 参考角度轴范围是[0,360]时#xff0c;0度在水平右侧.h.cpp 参考
Qt数据可视化(QPolarChart雷达图) 默认QPolarChart的范围是[0,360]时#xff0c;0度在垂直上方 如官方例子QValueAxis角度轴范围是[-100,100] 角度轴范围是[0,360]时#xff0c;0度在水平右侧 原理0度在水平右侧.h.cpp 参考
Qt数据可视化(QPolarChart雷达图) 默认QPolarChart的范围是[0,360]时0度在垂直上方 如官方例子QValueAxis角度轴范围是[-100,100] 角度轴范围是[0,360]时0度在水平右侧 原理角度轴使用范围改为[-90,270]此时0度在水平右侧使用分类轴QCategoryAxis 代替 数值轴QValueAxis 重新指定 -90 到 0 度之间的标签 注意此方法只能实现简单效果 复杂效果可以使用QGraphicsView实现顺时针旋转90°此方法本人在开发遇到缩放比例问题就没有使用 参考qt界面旋转 .h
#ifndef WIDGET_H
#define WIDGET_H#include QWidget
#include QPolarChart
#include QChartView
#include QScatterSeries
#include QList
#include QDebug
#include QLineSeries
#include QTimer#include QtCharts/QPolarChart
#include QtCharts/QAbstractAxis
#include QtCharts/QChart
#include QtCharts/QValueAxis
#include QtCharts/QCategoryAxis
#include QtCharts/QAbstractAxis
QT_CHARTS_USE_NAMESPACE/*****************************************自定义***********************************************************/
QT_CHARTS_BEGIN_NAMESPACEclass QAbstractSeries;
class QAbstractAxis;class VPolarChart:public QChart
{Q_OBJECTQ_ENUMS(PolarOrientation)Q_FLAGS(PolarOrientations)public:enum PolarOrientation {PolarOrientationRadial 0x1, // 径向轴,Y到圆心距离PolarOrientationAngular 0x2 // 角度轴,X角度 };Q_DECLARE_FLAGS(PolarOrientations, PolarOrientation)
public:VPolarChart(QGraphicsItem* parent nullptr, Qt::WindowFlags wFlags Qt::WindowFlags()) : QChart(QChart::ChartTypePolar, parent, wFlags){};~VPolarChart() {};// 径向轴void addRadialAxis(QValueAxis* radialAxis){if (radialAxis nullptr || radialAxis-type() QAbstractAxis::AxisTypeBarCategory) {qWarning(QAbstractAxis::AxisTypeBarCategory is not a supported axis type for polar charts.);return;}QChart::addAxis(radialAxis, Qt::AlignLeft);}// 角度轴void addAngularAxis(QCategoryAxis* angularAxis){if (angularAxis nullptr || angularAxis-type() QAbstractAxis::AxisTypeBarCategory) {qWarning(QAbstractAxis::AxisTypeBarCategory is not a supported axis type for polar charts.);return;}angularAxis-setMin(-90);angularAxis-setMax(270);angularAxis-setStartValue(-90);if (angularAxis-categoriesLabels().isEmpty()|| angularAxis-categoriesLabels().size() 9){angularAxis-append(270, -90); // 添加极坐标的角向标签angularAxis-append(315, -45);angularAxis-append(0, 0);angularAxis-append(45, 45);angularAxis-append(90, 90);angularAxis-append(135, 135);angularAxis-append(180, 180);angularAxis-append(225, 225);angularAxis-append(270, 270);}angularAxis-setLabelsPosition(QCategoryAxis::AxisLabelsPositionOnValue); // 设置标签位置QChart::addAxis(angularAxis, Qt::AlignBottom);}QListQAbstractAxis* axes(PolarOrientations polarOrientation PolarOrientations(PolarOrientationRadial | PolarOrientationAngular), QAbstractSeries* series nullptr) const {Qt::Orientations orientation(0);if (polarOrientation.testFlag(PolarOrientationAngular)) // 角度轴, X角度orientation | Qt::Horizontal; if (polarOrientation.testFlag(PolarOrientationRadial)) // 径向轴,Y到圆心距离orientation | Qt::Vertical;return QChart::axes(orientation, series);};static PolarOrientation axisPolarOrientation(QAbstractAxis* axis) {if (axis axis-orientation() Qt::Horizontal)return PolarOrientationAngular; // 角度轴elsereturn PolarOrientationRadial; // 径向轴};private:Q_DISABLE_COPY(VPolarChart)
};class VScatterSeries :public QScatterSeries
{
public:VScatterSeries(QObject* parent nullptr) :QScatterSeries(parent) {};~VScatterSeries() {};void insert(qreal x, qreal y) {x x 270 ? x - 360 : x;QXYSeries::append(x,y);}
private:
};QT_CHARTS_END_NAMESPACE/*****************************************自定义***********************************************************/class Widget : public QWidget {Q_OBJECTpublic:Widget(QWidget *parent 0);~Widget();void initConnect();void timeout();private:VPolarChart*m_ptrChart; // 极坐标图QChartView *m_ptrChartview;QTimer *m_ptrTime;qreal m_rangle; // 角
};#endif // WIDGET_H
.cpp
#include widget.h#include QSplineSeriesWidget::Widget(QWidget* parent): QWidget(parent), m_ptrChart(new VPolarChart), m_ptrChartview(new QChartView(m_ptrChart, this)), m_ptrTime(new QTimer), m_rangle(0)
{// 抗锯齿m_ptrChartview-setRenderHint(QPainter::Antialiasing);// 动画m_ptrChart-setAnimationOptions(QChart::GridAxisAnimations);// 表示曲线QSplineSeries* s new QSplineSeries();s-append(0, 0);s-append(m_rangle, 270);VScatterSeries* series new VScatterSeries(); // 创建一个散点绘图数据集对象const qreal angularMax 270; // 最大角度series-setName(散点);for (int i 0; i angularMax; i 10) {series-insert(i, i); // 向series中添加数据X角度 Y到圆心距离}
// series-setPointLabelsVisible(true);
// series-setPointLabelsFormat((xPoint, yPoint)); m_ptrChart-legend()-setVisible(true); // 隐藏图例//径向轴Y到圆心距离QValueAxis* radialAxis new QValueAxis();radialAxis-setTickCount(3);radialAxis-setLabelFormat(%d);m_ptrChart-addRadialAxis(radialAxis);//角度轴X角度 QCategoryAxis* angularAxis new QCategoryAxis();angularAxis-setShadesVisible(true); // 阴影angularAxis-setShadesBrush(QBrush(QColor(249, 249, 255)));m_ptrChart-addAngularAxis(angularAxis);m_ptrChartview-setFixedSize(500, 500); // QChartView 的大小设置为 500x500 像素m_ptrChart-addSeries(series); // 将创建的series添加进图表中m_ptrChart-addSeries(s);series-attachAxis(angularAxis);series-attachAxis(radialAxis);s-attachAxis(angularAxis);s-attachAxis(radialAxis);initConnect();m_ptrTime-start(100);
}
void Widget::initConnect()
{connect(m_ptrTime, QTimer::timeout, this, Widget::timeout);
}void Widget::timeout()
{qInfo() start timeout;foreach(auto * serie, m_ptrChart-series()) {if (serie nullptr) continue;//qInfo() item-type() item-type();if (serie-type() QSplineSeries::SeriesTypeSpline) {//清空曲线系列的数据点dynamic_castQSplineSeries*(serie)-clear();m_rangle (m_rangle 270)?(-90.): m_rangle1.5;//向曲线系列中添加数据点dynamic_castQSplineSeries*(serie)-append(0, 0);dynamic_castQSplineSeries*(serie)-append(m_rangle, 270);}}
}
Widget::~Widget() {}
