QCustomPlot:如何在y轴上设置百分比?如何更改标签对齐?

I am playing around with the QCustomPlot libary for Qt. I created some plots succesfully. But I got still questions:

我正在为Qt设计QCustomPlot libary。我成功地创建了一些情节。但我还是有问题:

1: How can I set my y-axis range from 0% to 100%?

1:我如何设置y轴的范围从0%到100%?

2: My tick labels are centered below the ticks. How can I change that to a left alignment?

我的蜱虫标签在蜱虫下面。如何将它改变为左对齐?

Thanks for your help.

谢谢你的帮助。

Peter

彼得

// generate some data:
    QVector<double> x(101), y(101); // initialize with entries 0..100
    for (int i=0; i<101; ++i)
    {
      x[i] = (i*960); // x goes from -1 to 1
      y[i] = x[i]/96000.0; // let's plot a quadratic function
    }
    // create graph and assign data to it:
    ui->customPlot->addGraph();
    ui->customPlot->graph(0)->setData(x, y);

    // set axes ranges, so we see all data:
    ui->customPlot->xAxis->setTickLabelType(QCPAxis::ltDateTime);
    ui->customPlot->xAxis->setDateTimeSpec(Qt::UTC);
    ui->customPlot->xAxis->setDateTimeFormat("hh:mm");
    ui->customPlot->xAxis->setAutoTickStep(false);
    ui->customPlot->xAxis->setTickStep(3600);
    ui->customPlot->xAxis->setRange(0, 86399);
    ui->customPlot->yAxis->setRange(0, 1);
    ui->customPlot->replot();

ui->customPlot->xAxis->setBasePen(QPen(Qt::white, 1));
ui->customPlot->yAxis->setBasePen(QPen(Qt::white, 1));
ui->customPlot->xAxis->setTickPen(QPen(Qt::white, 1));
ui->customPlot->yAxis->setTickPen(QPen(Qt::white, 1));
ui->customPlot->xAxis->setSubTickPen(QPen(Qt::white, 1));
ui->customPlot->yAxis->setSubTickPen(QPen(Qt::white, 1));
ui->customPlot->xAxis->setTickLabelColor(Qt::white);
ui->customPlot->yAxis->setTickLabelColor(Qt::white);
ui->customPlot->xAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
ui->customPlot->yAxis->grid()->setPen(QPen(QColor(140, 140, 140), 1, Qt::DotLine));
ui->customPlot->xAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
ui->customPlot->yAxis->grid()->setSubGridPen(QPen(QColor(80, 80, 80), 1, Qt::DotLine));
ui->customPlot->xAxis->grid()->setSubGridVisible(true);
ui->customPlot->yAxis->grid()->setSubGridVisible(true);
ui->customPlot->xAxis->grid()->setZeroLinePen(Qt::NoPen);
ui->customPlot->yAxis->grid()->setZeroLinePen(Qt::NoPen);
ui->customPlot->xAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);
ui->customPlot->yAxis->setUpperEnding(QCPLineEnding::esSpikeArrow);

1 个解决方案

#1

You should solve both questions with

你应该用这两个问题来解决

ui->customPlot->yAxis->setRange(0, 100, Qt::AlignLeft);

EDIT: to show custom text for ticks, you should add this code:

编辑:若要显示嘀嘀声的自定义文本，请添加以下代码:

QVector<double> TickValues;
QVector<QString> TickLabels;
// you can safely change the values according to the output
TickValues << 0  << 20 << 40 << 60 << 80 << 100;
TickLabels << "0" << "20%" << "40%" << "60%" << "80%" << "100%";
// disable default ticks and their labels
ui->customPlot->yAxis->setAutoTicks(false);
ui->customPlot->yAxis->setAutoTickLabels(false);
// add your custom values and labels
ui->customPlot->yAxis->setTickVector(TicksValues);
ui->customPlot->yAxis->setTickVectorLabels(TickLabels);

#1