QCPItemLine is being paint automatically
Clash Royale CLAN TAG#URR8PPPQCPItemLine is being paint automatically
Im trying using QCustomPlot in my gui
MainWindow.h
public:
void initArrow();
private:
QCustomPlot* grid;
QCPItemLine* arrow;
MainWindow.cpp
void MainWindow::initArrow() {
arrow = new QCPItemLine(ui->grid);
QPen pen(Qt::red);
pen.setWidth(4);
arrow->setPen(pen);
arrow->setHead(QCPLLineEnding::esLineArrow);
arrow->setHead(QCPLLineEnding::esDisc);
}
in this situation i'm playing the program, i resize the window and i see an arrow on the plot with coordinates (0,0) and (1,1).
this is the code
.
I didnt use replot!
I didnt use start!
I didnt use end!
in addition, when i will understand what is the problem I'm asking what is the correct way to draw a line when i'm trying to draw above other graph.
normally if I'm using points it will be like:
QVector<double> x;
QVector<double> y;
ui->grid->graph(number)->setData(x,y);
ui->grid->graph(number)->replot();
but I cant do setData with a line and its not related to some graph so i can i Draw the line on a specefic graph??
ui->grid
ok. in MainWindow i have QCustomPlot* grid. i want to make a function with x_start, y_start, x_end, y_end and draw an arrow accordingly
– asaf anter
1 hour ago
what is your goal?
– eyllanesc
1 hour ago
for example drawLine(1,1,4,5) will draw an arrow between those coordinates
– asaf anter
1 hour ago
If you do not explain clearly what you want and provide a decent Minimal, Complete, and Verifiable example unfortunately I can not help you :)
– eyllanesc
41 mins ago
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what is
ui->grid?– eyllanesc
1 hour ago