Divide a custom vertical layout by a Vertical splitter

[Please_Help_me_D]

Hi,

I created my layout PlotVLayout inherited from abstract class QLayout
PlotVLayout vertically sets QwtPlot widgets in a way that all canvases of these plots are one below another. So the main functionality of PlotVLayout is that it calculates the XY coordinates for each QwtPlot
Now I would like to insert something like a QSplitter between QwtPlot to allow the user to change the height of each QwtPlot. The picture is attached.
Is there a way to implement such functionality in my PlotVLayout?

[SGaist]

I don't know what is inside your code so I can't really comment,

Why a reference rather than a const reference ?

[SGaist]

Hi,

Something is not clear. You seem to have re-invented QVBoxLayout. Is that the case ?

In any case, a layout does not have a visual presence, they just do positioning. QSplitter is a widget that seem to do what you want directly. Just use it with the right direction.

[Please_Help_me_D]

@SGaist no I dont reinvent QVBoxLayout.
Lets suppose that we need two QwtPlot one below another but the canvas of each plot should have the same X-pos and different Y. So it is like two QwtPlot that share the same X-axis. Like in the picture:

[SGaist]

I see. In that case you should make a widget that takes advantage of your custom layout and adds a control that works like QSplitter.

You can check QSplitter's implementation.

[Please_Help_me_D]

@SGaist I encountered a strange problem...
I have two custom layouts (PlotVLayout ) and in private variable (QList<QwtPlot *> splitterPlotList;) I store list of widgets of both layouts.

When I resize the mainwindow I can see that this list changes its size (count of elemetns) from 1 to 2 but it should always be 2 elements in list (I have qDebug() << splitterPlotList.count();)

I set splitterPlotList by reference via:

void PlotVLayout::setPlotList(QList<QwtPlot *> &splitterPlotList){
    this->splitterPlotList = splitterPlotList;
}

Why this happens?
I suspect that when I resize the mainwindow my layouts work in parrallel threads and they are trying to achieve the same variable at the same time?

[SGaist]

I don't know what is inside your code so I can't really comment,

Why a reference rather than a const reference ?

[Please_Help_me_D]

@SGaist I just changed to const List<> & and now it works :)
thank you!