Is is possible to edit an individual Widget in the QtDesginer?

Question

I got a external library, which includes a derived class from QGLWidget, very similar to that one here. In that library I have a class:

class PictureGLWidget : public QGLWidget { //.. }

This extends Qt's native QGLWidget and personalizes it. But it was not written by me, I just got it, via a *.dll. So then, I bind that Widget manually in my code to a layout like:

QGridLayout* layout = new QGridLayout;
layout->addWidget(myPictureGLWidget, 0, 1);
ui->verticalLayout_5->addLayout(layout);

since I designed my MainWindowWidget with the integrated QtDesigner, which is by the way very comfortable, I would like to handle my myPictureGLWidget also in the QtDesigner, since I am currently redesigning the MainWindow.

Is there a way doing that? Thnx in advance!

surely you used designer to create this widget you are adding — AngryDuck, Jul 22 '15 at 10:18
@AngryDuck No, the Widget I am adding, was not written by me. I got it as a *.dll. — Ralf Wickum, Jul 22 '15 at 12:55
a widget as a dll... i assume you mean you using a library that contains a widget which is what your are getting an instance of in your code then adding to your layout... if this is the case then i have no idea how you would get it into designer, i have done this with my own lib stuff but that needed compiling in VS2012 and then importing as a qt designer plugin i assume the lib your using wont have it compiled in a way that designer plugins will understand though :/ — AngryDuck, Jul 22 '15 at 12:59
@Angryduck Exactly :( When I would have the source code, just (*.cpp & *.h) without any QtDesginer *.ui , would I be able to use it the QtDesigner then? — Ralf Wickum, Jul 22 '15 at 13:04
if the entire ui is just created in code from a cpp and a h file then i certainly wouldnt know how to open in designer my instinct is that it cant be done but dont take my work for it, why not just edit it in code? — AngryDuck, Jul 22 '15 at 13:36

score 0 · Answer 1 · answered Jul 22 '15 at 10:28

0

I might have misunderstood your question but don't you just add a QGLWidget to your design in Designer. Right click the widget and select Promote to... ?

answered Jul 22 '15 at 10:28

mikag

162
8

I think he wants to edit contents of said widget. Promoting doesn't allow that – Zeks Jul 22 '15 at 11:00
Well from the code sample it looks like he only wanted to get the widget in a layout and a promoted QGLWidget would definitely allow that... – mikag Jul 22 '15 at 14:11
I agree with you mikag. – Kuba hasn't forgotten Monica Jul 22 '15 at 21:35

score 0 · Accepted Answer · answered Jul 22 '15 at 21:34

Qt Designer supports any foreign widget class without needing to provide plugins for that. You only have to accept that the widget's properties and appearance won't be available within Designer.

Insert a dummy QWidget into the layout.
Right click on the widget, select "Promote to...".
Add PictureGLWidget as a new class promoted from QWidget. Specify appropriate header files etc.
Promote your widget to PictureGLWidget.

When this is done, the code generated by uic will instantiate a PictureGLWidget where you need it, instead of a dummy QWidget.

If you want to use the PictureGLWidget in the designer instead of a dummy widget, you can write a designer plugin that wraps the widget and exposes it in the widget pallette, provides property support, etc.

Is is possible to edit an individual Widget in the QtDesginer?

2 Answers2

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