Change Title of graph or axis

[mikrocat]

Hi,

in my app i plot a graph. The user can choose which data he wants to plot. I want that the user has the choice to change the title of the graph and axis. So I added a settingsdialog where you can type the title in a Textedit.

void graphsettingsdialog::on_ApplySettings_clicked(){
    ...
    QString titlexax=ui->TitleXAxEdit->text();
 
    PlotDialog->setxAxisTitle(titlexax);
    ...
}

void graphsettingsdialog::on_ApplySettings_clicked(){
    ...
    QString titlexax=ui->TitleXAxEdit->text();

    PlotDialog->setxAxisTitle(titlexax);
    ...
}

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void MonitorPlotWindow::setxAxisTitle(QString m_title){
    livePlot->setAxisTitle(livePlot->xBottom, m_title);
    qDebug() << "set Title" << livePlot->axisTitle(livePlot->xBottom).text();
}

void MonitorPlotWindow::setxAxisTitle(QString m_title){
    livePlot->setAxisTitle(livePlot->xBottom, m_title);
    qDebug() << "set Title" << livePlot->axisTitle(livePlot->xBottom).text();
}

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The qDebug() gives me the title I choosed but the plot still has the same title for the x-axe. I tried to replot and close and open the livePlot (livePlot->close(); livePlot->setAxisTitle(livePlot->xBottom, m_title); livePlot->open() but this had no effect.

[Uwe]

The posted code is correct and the axis title should updated without any further steps. So I guess there is something wrong in your application - maybe a different plot ?

Uwe

[mikrocat]

It seems like I do something basic wrong.
I have a Window MonitorPlotWindow in its constructor i call

MonitorPlotWindow::MonitorPlotWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MonitorPlotWindow)
{
    ui->setupUi(this);
    SetupPlot();
}

MonitorPlotWindow::MonitorPlotWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MonitorPlotWindow)
{
    ui->setupUi(this);
    SetupPlot();
}

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SetupPlot looks like this.

void MonitorPlotWindow::SetupPlot(){
    livePlot = new QwtPlot(ui->centralwidget);
    ui->horizontalLayout->addWidget(livePlot);
 
    QwtPlotGrid *liveGrid = new QwtPlotGrid();
    liveGrid->attach(livePlot);
 
    QwtPlotPanner *plotPanner = new QwtPlotPanner(livePlot->canvas());
 
    QwtPlotMagnifier *plotMagnifier = new QwtPlotMagnifier(livePlot->canvas());
 
    livePlot->setCanvasBackground(Qt::white);
 
    QwtLegend *legend = new QwtLegend;
    legend->setFrameStyle(QFrame::Box|QFrame::Sunken);
    livePlot->insertLegend(legend, QwtPlot::BottomLegend);
    livePlot->detachItems(QwtPlotItem::Rtti_PlotLegend, true);
}

void MonitorPlotWindow::SetupPlot(){
    livePlot = new QwtPlot(ui->centralwidget);
    ui->horizontalLayout->addWidget(livePlot);

    QwtPlotGrid *liveGrid = new QwtPlotGrid();
    liveGrid->attach(livePlot);
    
    QwtPlotPanner *plotPanner = new QwtPlotPanner(livePlot->canvas());

    QwtPlotMagnifier *plotMagnifier = new QwtPlotMagnifier(livePlot->canvas());

    livePlot->setCanvasBackground(Qt::white);

    QwtLegend *legend = new QwtLegend;
    legend->setFrameStyle(QFrame::Box|QFrame::Sunken);
    livePlot->insertLegend(legend, QwtPlot::BottomLegend);
    livePlot->detachItems(QwtPlotItem::Rtti_PlotLegend, true);
}

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From another Window I call

void MonitorWindow::on_actionShow_triggered(){
    Plot->show();
}

void MonitorWindow::on_actionShow_triggered(){
    Plot->show();
}

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void MonitorWindow::allocateMemory(){
    Plot = new MonitorPlotWindow(this);
}

void MonitorWindow::allocateMemory(){
    Plot = new MonitorPlotWindow(this);
}

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