My UI widget is not displayed

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Posts: 8
Joined: Wed Apr 23, 2014 9:33 am

My UI widget is not displayed

Postby plane » Wed Apr 23, 2014 5:51 pm

Hello Everybody,

I have programming experince but I am new with Qt, JavaScript and QCAD.
So far I was able to replicate all the examples described in the web site.

I am trying to replicate the example PersistentWidgets as described at following link
but I cannot get the widget displayed.

I have created the folder structure the Action and the UI file.
In PersistentWidgets.js I have copied and pasted the code from

I start QCAD with debugger enabled and I get an error
MyWidgets3.png (44.6 KiB) Viewed 3864 times

I have removed the if statement
if (!dialog.exec()) {
// User hit cancel:

and now I can see the following instructions are executed,
// Print the user input to the QCAD console:
var appWin = EAction.getMainWindow();
appWin.handleUserMessage("Position X: " + positionX);
appWin.handleUserMessage("Position Y: " + positionY);

MyWidgets4.png (3.17 KiB) Viewed 3864 times

but the widget is not displayed.

Did I miss any instruction or anything else, please?
I would be glad if you could give me any suggestion.

Kind regards,

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Posts: 4128
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Re: My UI widget is not displayed

Postby andrew » Wed Apr 23, 2014 9:02 pm

It looks like your widget is not a dialog but probably a normal widget.

Regular widgets can be shown with show:;

Dialogs are typically executed and only return to the main program once they are closed. Regular widgets can be shown / hidden at any time without influencing the flow of the main application.

Newbie Member
Posts: 8
Joined: Wed Apr 23, 2014 9:33 am

Re: My UI widget is not displayed

Postby plane » Mon Apr 28, 2014 10:26 am

Andrew thank you for your reply.

it works with following statement
// Display and execute the dialog:;
MyWidgets.prototype.beginEvent = function()

My next step is now how to capture events from my dialog.
Thank you again for your prompt answer.

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