[Qt-interest] Access a dialogue's widgets created with Qt designer from main window?

[Ian Thomson]

Hi,

Robert Wood wrote:
> If I create userData with *code* within the server_dialogue.cpp like this:
> 
> userData = new QLineEdit(this);
> userData->setGeometry(30,30,120,30);
> userData->show();
> 
> Then I can happily get the data in the main window with this line:
> 
> QString t = dialogue.userData()->text();

No you can't, calling userData() will cause a compile error because 
userData is a QLineEdit pointer. You would just do dialogue.userData->text()

> But this complains about a forward declaration of the structure 
> Ui::server_dialogue.

The compiler is not lying to you here. It can't use anything which is 
only a forward declaration. You could get round this by including the 
headers for the ui file but that is getting messy.

What I recommend is adding a public function in your dialogue code that 
returns ui->userData.text()

> Is it possible to do what I want, or do I simply have to hand code the 
> widgets in the dialogue?

The ui compiler just generates code for these widgets. Take a look at 
the output of uic and you'll see that there is no difference between 
hand coded widgets and widgets generated from designer.

Cheers,
Ian.