Plots and Layouts

Hi,

I'm trying to put 3 plots in a Dialog, one big on the left, and two other one above tho other on the right side.
But I don't know how, cause I can't find a way to use Layout with Plot.

Can you help me with this?

best regards, Ozzy

There is nothing special with QwtPlot, when using it in QLayouts.
What did you try ?

Uwe

Hi Uwe,

thanks for your answer. I've tried something like this:

Code:

---

QwtPlot *myPlot = new QwtPlot;
QGridLayout *layout = new QGridLayout( this );
 
setTitle( "Titel" );
QwtPlotCurve *plot = new QwtPlotCurve( "Plot1 " ); 
 
plot->setPen(QPen(Qt::black)); 
plot->attach(this); 
plot->setStyle(QwtPlotCurve::Sticks);
 
double vx[vec.size()]; 
double vy[vec.size()];
for(uint i=0; i<vec.size(); i++) { 
   vx[i]= i; 
   vy[i]= vec[i];
}
 
plot->setData(vx, vy, vec.size());
 
plot->attach(myPlot);
layout->addWidget( myPlot );
 
replot();

---

But now there are two plot, and one is on top of the other, but a little bit shifted.
Can you help me with this?

Greetings from germany, Ozzy

Hi,

i guess I know whats wrong

Code:

---

class Plot : public QwtPlot

---

Thats, why he paint the second graph. But what can I do? If I use something like QFrame, then repaint() is unknown...

MfG, Ozzy

Ok, it works. But I'm interest, if theres a better way to go...

Ozzy

Hello,

can you tell me, how did you manage to draw the plots within a QFrame?

I wanted to include the spectrogram example of qwt in my programm, but nothing is displayed there:

Code:

---

ui_frame_for_plot = qFindChild<QFrame*>(this, "frame_for_plot");
 
Plot *d_plot;
 
d_plot = new Plot(ui_frame_for_plot);
	d_plot->showSpectrogram(true);

---

How can I integrate a QwtPlot into another widget?

Thank you.

best regards,

Vitali

Ok, I have solved it myself by inserting the QwtPlot into a layout:

Code:

---

QVBoxLayout * layout_plot = new QVBoxLayout(ui_frame_for_plot);
 
	// build object of class "Plot", which will plot the 2D surfaces
	d_plot = new Plot();
	layout_plot->addWidget(d_plot);
	d_plot->showSpectrogram(true);

---

Now the plot is displayed.