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This commit is contained in:
feiyangqingyun
2022-05-18 17:39:04 +08:00
parent 96938b94f9
commit a155ad45d3
32 changed files with 145 additions and 322 deletions
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40
third/qcustomplotdemo/frmexample2/frmscrollbar.cpp
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@@ -16,21 +16,23 @@ frmScrollBar::~frmScrollBar()
void frmScrollBar::initForm()
{
// The following plot setup is mostly taken from the plot demos:
ui->plot->addGraph();
ui->plot->graph()->setPen(QPen(Qt::blue));
ui->plot->graph()->setBrush(QBrush(QColor(0, 0, 255, 20)));
ui->plot->addGraph();
ui->plot->graph()->setPen(QPen(Qt::red));
ui->customPlot->addGraph();
ui->customPlot->graph()->setPen(QPen(Qt::blue));
ui->customPlot->graph()->setBrush(QBrush(QColor(0, 0, 255, 20)));
ui->customPlot->addGraph();
ui->customPlot->graph()->setPen(QPen(Qt::red));
QVector<double> x(500), y0(500), y1(500);
for (int i = 0; i < 500; ++i) {
x[i] = (i / 499.0 - 0.5) * 10;
y0[i] = qExp(-x[i] * x[i] * 0.25) * qSin(x[i] * 5) * 5;
y1[i] = qExp(-x[i] * x[i] * 0.25) * 5;
}
ui->plot->graph(0)->setData(x, y0);
ui->plot->graph(1)->setData(x, y1);
ui->plot->axisRect()->setupFullAxesBox(true);
ui->plot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
ui->customPlot->graph(0)->setData(x, y0);
ui->customPlot->graph(1)->setData(x, y1);
ui->customPlot->axisRect()->setupFullAxesBox(true);
ui->customPlot->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom);
// configure scroll bars:
// Since scroll bars only support integer values, we'll set a high default range of -500..500 and
@@ -43,27 +45,27 @@ void frmScrollBar::initForm()
// create connection between axes and scroll bars:
connect(ui->horizontalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(horzScrollBarChanged(int)));
connect(ui->verticalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(vertScrollBarChanged(int)));
connect(ui->plot->xAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(xAxisChanged(QCPRange)));
connect(ui->plot->yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(yAxisChanged(QCPRange)));
connect(ui->customPlot->xAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(xAxisChanged(QCPRange)));
connect(ui->customPlot->yAxis, SIGNAL(rangeChanged(QCPRange)), this, SLOT(yAxisChanged(QCPRange)));
// initialize axis range (and scroll bar positions via signals we just connected):
ui->plot->xAxis->setRange(0, 6, Qt::AlignCenter);
ui->plot->yAxis->setRange(0, 10, Qt::AlignCenter);
ui->customPlot->xAxis->setRange(0, 6, Qt::AlignCenter);
ui->customPlot->yAxis->setRange(0, 10, Qt::AlignCenter);
}
void frmScrollBar::horzScrollBarChanged(int value)
{
if (qAbs(ui->plot->xAxis->range().center() - value / 100.0) > 0.01) { // if user is dragging plot, we don't want to replot twice
ui->plot->xAxis->setRange(value / 100.0, ui->plot->xAxis->range().size(), Qt::AlignCenter);
ui->plot->replot();
if (qAbs(ui->customPlot->xAxis->range().center() - value / 100.0) > 0.01) { // if user is dragging plot, we don't want to replot twice
ui->customPlot->xAxis->setRange(value / 100.0, ui->customPlot->xAxis->range().size(), Qt::AlignCenter);
ui->customPlot->replot();
}
}
void frmScrollBar::vertScrollBarChanged(int value)
{
if (qAbs(ui->plot->yAxis->range().center() + value / 100.0) > 0.01) { // if user is dragging plot, we don't want to replot twice
ui->plot->yAxis->setRange(-value / 100.0, ui->plot->yAxis->range().size(), Qt::AlignCenter);
ui->plot->replot();
if (qAbs(ui->customPlot->yAxis->range().center() + value / 100.0) > 0.01) { // if user is dragging plot, we don't want to replot twice
ui->customPlot->yAxis->setRange(-value / 100.0, ui->customPlot->yAxis->range().size(), Qt::AlignCenter);
ui->customPlot->replot();
}
}