基本思路

  • 使用Qt的控件Table绘制表格

  • 使用Qt提供的类QChart绘制曲线、饼状、条形图等

    统计表格

  • 示例程序 ```cpp void Form_pointState::buildTable(QVector vecPoint) { //设置表格单元格不可编辑 ui->tb_pointState->setEditTriggers(QAbstractItemView::NoEditTriggers); //设置表格行数 ui->tb_pointState->setRowCount(vecPoint.size()); //设置表格列数 ui->tb_pointState->setColumnCount(2); //设置表格列表头 ui->tb_pointState->setHorizontalHeaderLabels(QStringList()<<”表头1”<<”表头2”); //填入单元格内容 for (int i=0;itb_pointState->rowCount();i++) {

    1.   //填入内容
    2.   ui->tb_pointState->setItem(i,0,new QTableWidgetItem(QString::number(vecPoint[i]->mem1)));
    3.   //设置单元格内容居中
    4.   ui->tb_pointState->item(i,0)->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);
    5.   ui->tb_pointState->setItem(i,1,new QTableWidgetItem(vecPoint[i]->mem2));
    6.   ui->tb_pointState->item(i,1)->setTextAlignment(Qt::AlignHCenter|Qt::AlignVCenter);

    }

}

  2. - 注：
  3.    - 在该实例中`vecPoint`为一结构体向量，即数据的组织形式类似于表格
  4.    - `setTextAlignment`方法填入单元格须为字符串形式，如果传入为数字，需要使用`QString::number`方法转换
  5. <a name="uK0pX"></a>
  6. # 柱状图
  8. - 示例程序
  9. - 在`.pro`文件中添加内容
  10. ```cpp
  11. QT       += core gui charts

  • 在ui界面设计器添加控件 QWidget， 并提升为 QChart

    1. //传入参数为表中所需数据
    2. //每行为项目，每列为类别，数据以空格隔开
    3. QString Form_linkstate::buildTable(QString fileName)
    4. {
    5.   QString info = "";
    7.   // put the date from file to vector
    8.   // struct performance 为有着三个成员变量的结构体
    9.   QString tempStr;
    10.   QStringList tempStrList;
    11.   struct performance tempPerformance;
    13.   QFile aFile(fileName);
    14.   QTextStream aStream(&aFile);
    15.   if(!aFile.open(QIODevice::ReadOnly | QIODevice::Text))
    16.       return "文件"+fileName+"不存在";
    18.   while(!aStream.atEnd())
    19.   {
    20.       tempStr = aStream.readLine();
    21.       tempStrList = tempStr.split(" ");
    22.       tempPerformance.mem1 = tempStrList[0].toDouble();
    23.       tempPerformance.mem2 = tempStrList[1].toDouble();
    24.       tempPerformance.mem3 = tempStrList[2].toDouble();
    25.       vecPerformance.append(tempPerformance);
    26.   }
    28.   aFile.close();
    30.   // find the max value of vector
    31.   // 查找表中的最大值，美化后面的绘图部分
    32.   double MaxValue = 0.0;
    33.   for (int i=0;i<vecPerformance.size();i++) {
    34.       if(vecPerformance[i].mem1 > MaxValue)
    35.           MaxValue = vecPerformance[i].mem1;
    36.       if(vecPerformance[i].mem2 > MaxValue)
    37.           MaxValue = vecPerformance[i].mem2;
    38.       if(vecPerformance[i].mem3 > MaxValue)
    39.           MaxValue = vecPerformance[i].mem3;
    40.   }
    42.   // paint the table
    43.   QChart* chart = new QChart();
    45.   QBarSet *set0 = new QBarSet("类别1");
    46.   QBarSet *set1 = new QBarSet("类别2");
    47.   QBarSet *set2 = new QBarSet("类别3");
    48.   for (int i=0;i<vecPerformance.size();i++) {
    49.       *set0 << vecPerformance[i].mem1;
    50.       *set1 << vecPerformance[i].mem2;
    51.       *set2 << vecPerformance[i].mem3;
    52.   }
    53.   set0->setLabelColor(QColor(0,0,255));
    54.   set1->setLabelColor(QColor(0,0,255));
    55.   set2->setLabelColor(QColor(0,0,255));
    57.   QBarSeries *series = new QBarSeries();
    58.   series->append(set0);
    59.   series->append(set1);
    60.   series->append(set2);
    61.   series->setVisible(true);
    62.   series->setLabelsVisible(true);
    63.   series->setLabelsPosition(QAbstractBarSeries::LabelsOutsideEnd);
    64.   chart->addSeries(series);//添加系列到QChart上
    66.   chart->setTheme(QChart::ChartThemeLight);//设置白色主题
    68.   QBarCategoryAxis *axisX = new QBarCategoryAxis;
    69.   for (int i=0;i<vecPerformance.size();i++) {
    70.       axisX->append("项目"+QString::number(i));
    71.   }
    72.   axisX->setLabelsColor(QColor(7,28,96));
    73.   chart->addAxis(axisX, Qt::AlignBottom);
    74.   series->attachAxis(axisX);
    76.   QValueAxis *axisY = new QValueAxis;
    77.   axisY->setRange(0,MaxValue+0.02);
    78.   chart->addAxis(axisY, Qt::AlignLeft);
    79.   series->attachAxis(axisY);
    80.   axisY->setTitleText("指标");
    82.   chart->legend()->setVisible(true);
    83.   chart->legend()->setAlignment(Qt::AlignBottom);//底部对齐
    84.   chart->legend()->setBackgroundVisible(true);//设置背景是否可视
    85.   chart->legend()->setAutoFillBackground(true);//设置背景自动填充
    86.   chart->legend()->setColor(QColor(222,233,251));//设置颜色
    87.   chart->legend()->setLabelColor(QColor(0,100,255));//设置标签颜色
    88.   chart->legend()->setMaximumHeight(50);
    90.   ui->widget->setChart(chart);
    92.   return info;
    93. }

    参考内容

    QT-QChart之曲线图,饼状图,条形图使用 https://www.cnblogs.com/lifexy/p/10985191.html QTCharts入门 使用QChartView做折线图 https://blog.csdn.net/baizy77/article/details/84107786