c++ - vtk 图表 - 如何在轴线末端绘制轴标签？

Question

是否可以在标签的末尾绘制轴标签？ 详情见图片:

http://habrastorage.org/files/94f/41a/b18/94f41ab1897a4bde815644bf287b4af9.png

如果可能，怎么做？

vtkNew<vtkContextView> contextView;

vtkNew<vtkTable> table;
vtkNew<vtkChartXY> chart;
vtkNew<vtkDoubleArray> timeAxis;
vtkNew<vtkDoubleArray> realDataAxis;
vtkNew<vtkDoubleArray> measuredDataAxis;

// ...

contextView->SetInteractor(vtkWidget->GetInteractor());
vtkWidget->SetRenderWindow(contextView->GetRenderWindow());

timeAxis->SetName("t");
realDataAxis->SetName("x(t)");
measuredDataAxis->SetName("x*(t)");

table->AddColumn(timeAxis.Get());
table->AddColumn(realDataAxis.Get());
table->AddColumn(measuredDataAxis.Get());

chart->SetShowLegend(true);
auto legend = chart->GetLegend();
legend->GetLabelProperties()->SetFontSize(14);
legend->GetLabelProperties()->SetFontFamilyToTimes();

auto xAxis = chart->GetAxis(vtkAxis::BOTTOM);
xAxis->SetTitle(QApplication::translate("DataSetChartWidget", "t").toStdString());

auto xTitleProps = xAxis->GetTitleProperties();
xTitleProps->SetFontSize(14);
xTitleProps->SetFontFamilyToTimes();

auto xLabelProps = xAxis->GetLabelProperties();
xLabelProps->SetFontSize(14);
xLabelProps->SetFontFamilyToTimes();

auto yAxis = chart->GetAxis(vtkAxis::LEFT);
yAxis->SetTitle(QApplication::translate("DataSetChartWidget", "x(t), x*(t)").toStdString());

auto yTitleProps = yAxis->GetTitleProperties();
yTitleProps->SetFontSize(14);
yTitleProps->SetFontFamilyToTimes();

auto yLabelProps = yAxis->GetLabelProperties();
yLabelProps->SetFontSize(14);
yLabelProps->SetFontFamilyToTimes();

contextView->GetScene()->AddItem(chart.Get());

绘图代码:

auto realPlot = chart->AddPlot(vtkChart::LINE);
realPlot->SetInputData(table.Get(), 0, 1);

auto measuredPlot = chart->AddPlot(vtkChart::POINTS);
measuredPlot->SetInputData(table.Get(), 0, 2);

Answer 1

您可以设置坐标轴标题的垂直和水平对齐方式。

例如

myVtkChart->GetAxis(0)->GetTitleProperties()->SetJustificationToLeft();

在你的情况下调用就足够了

xTitleProps->SetJustificationToRight();
yTitleProps->SetJustificationToLeft();

但标题宽度似乎没有缩放到轴长度。 这意味着可能需要在您的标题字符串中放入一些空格以获得预期的结果。