10 Data Visualization

概述

三维柱状图

QWidget *graphContainer= QWidget::createWindowContainer(graph3D);//图表的容器
Q3DBars *graph3D= new Q3DBars();   //图表
graph3D->scene()->activeCamera()->setCameraPreset(Q3DCamera::CameraPresetFrontHigh); //设置视角

QValue3DAxis *axisV=new QValue3DAxis; //数值坐标
    axisV->setTitle("value");
    axisV->setTitleVisible(true);

QCategory3DAxis *axisRow=new QCategory3DAxis;

graph3D->setValueAxis(axisV);
graph3D->setRowAxis(axisRow);

QBar3DSeries *series= new QBar3DSeries;   //序列
series->setMesh(QAbstract3DSeries::MeshCylinder); 
series->setItemLabelFormat("(@rowLabel,@colLabel): %.1f"); //项的标签显示格式
graph3D->addSeries(series);

QBarDataArray *dataSet = new QBarDataArray; //数据代理
dataSet->reserve(rowLabs.count());
QBarDataRow *dataRow = new QBarDataRow;
*dataRow << 1 << 2<< 3<< 4<<5; //第1行数据，有5列
dataSet->append(dataRow);
series->dataProxy()->resetArray(dataSet);

//图表的网格
    graph3D->activeTheme()->setGridEnabled(checked);
//柱状图的光滑性
    series->setMeshSmooth(checked);
//反射
    graph3D->setReflection(checked);
//轴标题
    graph3D->valueAxis()->setTitleVisible(checked);
    graph3D->rowAxis()->setTitleVisible(checked);
    graph3D->columnAxis()->setTitleVisible(checked);
//轴标签背景
    graph3D->activeTheme()->setLabelBackgroundEnabled(checked);
//Z轴反向
    graph3D->valueAxis()->setReversed(checked);
//图表的背景
    graph3D->activeTheme()->setBackgroundEnabled(checked);
//轴标签字体大小
    QFont font = graph3D->activeTheme()->font();
    font.setPointSize(arg1);
    graph3D->activeTheme()->setFont(font);
//设置主题
    Q3DTheme *currentTheme = graph3D->activeTheme();
    currentTheme->setType(Q3DTheme::Theme(index));
//设置序列柱状图的颜色
    QColor  color=series->baseColor();
    color=QColorDialog::getColor(color);
    if (color.isValid())
        series->setBaseColor(color);
//项的标签
    series->setItemLabelFormat("value at (@rowLabel,@colLabel): %.1f");
    series->setItemLabelVisible(checked);
//棒图的样式
    QAbstract3DSeries::Mesh aMesh;
    aMesh=QAbstract3DSeries::Mesh(index);
    series->setMesh(aMesh);
//选择模式
    graph3D->setSelectionMode(QAbstract3DGraph::SelectionFlags(index));
 //变换视角
   Q3DCamera::CameraPreset  cameraPos=Q3DCamera::CameraPreset(index);
   graph3D->scene()->activeCamera()->setCameraPreset(cameraPos);
//设置变换视角
graph3D->scene()->activeCamera()->setCameraPosition(xRot, yRot,zoom);

三维散点图

Q3DScatter  *graph3D=new Q3DScatter();;       //散点图
QScatter3DSeries *series=new QScatter3DSeries(proxy);//散点序列
QScatterDataProxy *proxy = new QScatterDataProxy(); //数据代理
series->setMeshSmooth(true);
graph3D->addSeries(series);
//创建坐标轴
graph3D->axisX()->setTitle("axis X");
graph3D->axisX()->setTitleVisible(true);

QScatterDataArray *dataArray = new QScatterDataArray();
dataArray->resize(itemCount);
QScatterDataItem *ptrToDataArray = &dataArray->first();

for(i=1,i<100,++i)
{
    ptrToDataArray->setPosition(QVector3D(x,z,y));
    ptrToDataArray++;
}

三维曲面图

#include    <QtDataVisualization>
using namespace QtDataVisualization;

QWidget* graphContainer=QWidget::createWindowContainer(graph3D);
Q3DSurface      *graph3D= new Q3DSurface();   //三维图表

//创建坐标轴
QValue3DAxis *axisX=new QValue3DAxis;
axisX->setTitle("Axis X");
axisX->setTitleVisible(true);
axisX->setRange(-11,11);
graph3D->setAxisX(axisX);

QSurfaceDataProxy *proxy= new QSurfaceDataProxy();//数据代理
QSurface3DSeries* series= new QSurface3DSeries(proxy);//序列
series->setItemLabelFormat("(@xLabel @yLabel @zLabel)");
series->setMeshSmooth(true);
series->setDrawMode(QSurface3DSeries::DrawSurfaceAndWireframe);
graph3D->addSeries(series);

//创建数据, 墨西哥草帽
    QSurfaceDataArray *dataArray = new QSurfaceDataArray; //数组
    dataArray->reserve(N);
	proxy->resetArray(dataArray);

//渐变颜色按钮
    QLinearGradient grBtoY(0, 0, 100, 0);   //线型渐变
    grBtoY.setColorAt(1.0, Qt::black);
    grBtoY.setColorAt(0.0, Qt::yellow);
	QPixmap pm(160, 20);    //图片
    QPainter pmp(&pm);//画家
    pmp.setBrush(QBrush(grBtoY)); //渐变颜色1
    pmp.setPen(Qt::NoPen);
    pmp.drawRect(0, 0, 160, 20);
    ui->btnGrad1->setIcon(QIcon(pm));//渐变颜色按钮1

//单一曲面颜色
    QColor  color=series->baseColor();
    color=QColorDialog::getColor(color);
    if (color.isValid())
    {
        series->setBaseColor(color);
        series->setColorStyle(Q3DTheme::ColorStyleUniform);
    }

//选择模式（如剖面图）
graph3D->setSelectionMode(QAbstract3DGraph::SelectionSlice);
//曲面样式（入是否是框架图）
series->setDrawMode(QSurface3DSeries::DrawWireframe);
void MainWindow::on_btnGrad1_clicked()
{//设置曲面渐变颜色
    QLinearGradient gr;
    gr.setColorAt(0.0, Qt::black);
    gr.setColorAt(0.33, Qt::blue);
    gr.setColorAt(0.67, Qt::red);
    gr.setColorAt(1.0, Qt::yellow);

    series->setBaseGradient(gr);
    series->setColorStyle(Q3DTheme::ColorStyleRangeGradient);
}

//选择标识的形状，如一个点，一个三角
QAbstract3DSeries::Mesh aMesh;
aMesh=QAbstract3DSeries::Mesh(index+1);
series->setMesh(aMesh);

三维地形图

Q3DSurface  *graph3D= new Q3DSurface();//三维图表

//创建数据代理
QImage heightMapImage(":/map/sea.png");
QHeightMapSurfaceDataProxy *proxy= new QHeightMapSurfaceDataProxy(heightMapImage); //数据代理
proxy->setValueRanges(-5000, 5000, -5000, 5000);

QSurface3DSeries *series= new QSurface3DSeries(proxy);//序列