[Qt-interest] Passing a variable back from a form

[NoRulez]

Hi,

you could connect the buttons to the dialogs close() slot and emit a signal with your value (e.g. emit buttonValue(42); )

Best Regards

Am 22.03.2011 um 23:12 schrieb Robert Wood <robert.wood at apostrophe.co.uk>:

> I am trying to create a pop-up window that has a load of JPEGs on it. 
> When one of the JPEGs (which is put on a push button) is clicked, I want 
> the form to close and a value dependent on which button is pressed 
> passed back to the calling form.
> 
> I have tried a few things such as making it a dialogue box, but this 
> doesn't work as you seem to need to press the OK button. I tried this 
> (using a naughty global variable!):
> 
> 
> // This routine does return the value and close the form
> quint16 config_dialogue::returnConfig(void)
> {
> 
>     return RetVal;
> 
> }
> 
> // This is one of the JPEG buttons; it does set the RetVal to 42
> // but it does not shut the form down and pass the value back
> quint16 config_dialogue::nineGroups(void)
> {
> 
>     RetVal = 42;
>     returnConfig();
> 
> }
> 
> Then used this from the calling from:
> 
>    config_dialogue dialogue(this);
> 
>    if (dialogue.exec() == QDialog::Accepted)
>        {
>        ConfigNumber = dialogue.returnConfig();
>        ui->label->setText("Number returned" + QString::number(ConfigNumber));
>        }
> 
> And although I do get 42 back. I still have to press the OK button.
> 
> So, is there a way to have a load of buttons on a form and whichever 
> button you press it passes a unique number back to the calling form 
> please? It doesn't have to be a dialogue, just a normal form will be fine.
> 
> I did try passing a pointer to a variable to the dialogue/form and 
> making the dialogue modal, but the scope of it is only within the  class 
> constructor. I guess there might be a way of having this pointer 
> accessible within the rest of the class, but this would be a weakness in 
> my C++ knowledge. (Yes I know this isn't a C++ tutorial forum, so if 
> this question offends please just ignore me!).
> 
> Thanks!
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