passing variables in a QWidget constructor when programming with QTDesigner

[nass]

Hello everyone,
i am programming in Qt Designer and i want during the QWidget::init() call to pass some variables of my own.. but QtDesigner does not give you anyway to tamper with the form constructor.. and i do not want to affect directly the generated .h and .cpp files under folder .ui/ since they can be overwritten. Is there somethng else i can do?
Nass

[jacek]

Yes, use the subclassing approach.

[arnaiz]

Maybe not the best way to do it, but pretty easy. You can write a public method for your Widget, and send your parameters when you call this special method. Maybe a little example can be better:

// Somewhere in code, create an instance of some widget
    viewer = new Viewer(frame3D, "graf");
    // we need to send X and Y dynamic sizes, so:
    viewer->param(sizeX, sizeY);
    // put 'viewer' on screen...
    viewer->show();
    //.................

// Somewhere in code, create an instance of some widget
    viewer = new Viewer(frame3D, "graf");
    // we need to send X and Y dynamic sizes, so:
    viewer->param(sizeX, sizeY);
    // put 'viewer' on screen...
    viewer->show();
    //.................

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Note that we call param() before actually showing the widget. This way
param executes just after construct, and after init(), but before the widget is shown.

Class Viewer, must have a public method param():

void Viewer::param(int X, int Y) {....}

void Viewer::param(int X, int Y) {....}

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Hope this aproach can help someone.