QChart 坐标轴设置
1 // 添加轴
2 QValueAxis *xAxis = new QValueAxis(); 3 QValueAxis *yAxis = new QValueAxis(); 4
5 // 坐标轴整体
6 xAxis->setRange(0, 10); 7 yAxis->setRange(0, 10); 8
9 // 轴标题设置
10 xAxis->setTitleText(QStringLiteral("时间")); 11 xAxis->setTitleFont(QFont("宋体")); 12 QBrush brush; 13 brush.setStyle(Qt::SolidPattern); 14 brush.setColor(Qt::red); 15 xAxis->setTitleBrush(brush); 16
17 // 轴标签设置
18 xAxis->setLabelFormat("%.1f"); 19 xAxis->setLabelsAngle(45); 20 xAxis->setLabelsColor(Qt::blue); 21 xAxis->setLabelsEditable(true); 22
23 // 轴线和刻度线设置
24 xAxis->setTickCount(11); 25 QPen pen; 26 pen.setStyle(Qt::SolidLine); 27 pen.setColor(Qt::red); 28 xAxis->setLinePen(pen); 29 xAxis->setLineVisible(true); 30 xAxis->setLinePenColor(Qt::blue); 31
32 // 主网格线设置
33 xAxis->setGridLineVisible(true); 34 xAxis->setGridLineColor(Qt::black); 35
36 // 次刻度和次网格线设置
37 xAxis->setMinorTickCount(1); 38 xAxis->setMinorGridLineColor(Qt::red);
完整代码
1 QChart *chart = new QChart(); 2
3 chart->setTheme(QChart::ChartThemeQt); 4 chart->setTitle("显示坐标点"); 5 chart->setMargins(QMargins(10, 10, 10, 10)); 6
7
8 QLineSeries *lineSeries0 = new QLineSeries(); 9
10 lineSeries0->setName("时间 1"); 11 lineSeries0->append(0, 8); 12 lineSeries0->append(2, 8); 13 lineSeries0->append(3, 6); 14 lineSeries0->append(5, 6); 15 lineSeries0->append(7, 9); 16 *lineSeries0 << QPointF(9, 9) << QPointF(10, 7); 17
18 QScatterSeries *scatterSeries = new QScatterSeries(); 19
20 scatterSeries->setName("时间"); 21 scatterSeries->setPointLabelsFormat("(@xPoint, @yPoint)"); 22 scatterSeries->setMarkerSize(6); 23 scatterSeries->setPointLabelsVisible(); 24
25 scatterSeries->append(0, 8); 26 scatterSeries->append(2, 8); 27 scatterSeries->append(3, 6); 28 scatterSeries->append(5, 6); 29 scatterSeries->append(7, 9); 30 scatterSeries->append(9, 9); 31 scatterSeries->append(10, 7); 32
33 // 添加轴
34 QValueAxis *xAxis = new QValueAxis(); 35 QValueAxis *yAxis = new QValueAxis(); 36
37 // 坐标轴整体
38 xAxis->setRange(0, 10); 39 yAxis->setRange(0, 10); 40
41 // 轴标题设置
42 xAxis->setTitleText(QStringLiteral("时间")); 43 xAxis->setTitleFont(QFont("宋体")); 44 QBrush brush; 45 brush.setStyle(Qt::SolidPattern); 46 brush.setColor(Qt::red); 47 xAxis->setTitleBrush(brush); 48
49 // 轴标签设置
50 xAxis->setLabelFormat("%.1f"); 51 xAxis->setLabelsAngle(45); 52 xAxis->setLabelsColor(Qt::blue); 53 xAxis->setLabelsEditable(true); 54
55 // 轴线和刻度线设置
56 xAxis->setTickCount(11); 57 QPen pen; 58 pen.setStyle(Qt::SolidLine); 59 pen.setColor(Qt::red); 60 xAxis->setLinePen(pen); 61 xAxis->setLineVisible(true); 62 xAxis->setLinePenColor(Qt::blue); 63
64 // 主网格线设置
65 xAxis->setGridLineVisible(true); 66 xAxis->setGridLineColor(Qt::black); 67
68 // 次刻度和次网格线设置
69 xAxis->setMinorTickCount(1); 70 xAxis->setMinorGridLineColor(Qt::red); 71
72 chart->addSeries(lineSeries0); 73 chart->addSeries(scatterSeries); 74
75 chart->addAxis(xAxis, Qt::AlignBottom); 76 chart->addAxis(yAxis, Qt::AlignLeft); 77
78 scatterSeries->attachAxis(xAxis); 79 scatterSeries->attachAxis(yAxis); 80
81 lineSeries0->attachAxis(xAxis); 82 lineSeries0->attachAxis(yAxis); 83
84 ui->chartView->setChart(chart); 85 ui->chartView->setRubberBand(QChartView::RectangleRubberBand); 86 ui->chartView->setRenderHint(QPainter::Antialiasing, true);
运行效果
