4. Hello, don't meant to bug anybody again, =/. QDockWidget not doing what I expected it to do.

Hello, don't meant to bug anybody again, =/. QDockWidget not doing what I expected it to do.


  • Hello, I was trying to get my QDockWidget WIdget to hide and show when a user clicks the Checkbox, but it didn't appear to be doing what I expected it to do.

    I have included a link to my sources. Whoops, forgot to add more, it does compile, but it appears to be showing and not hiding.

    http://pastebin.com/ZXMsc9QE

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  • In your constructor you use :

    @    if (showdckWidgetChkBox->isChecked()) {
            showdckWidgetChkBox->show();
        } else {
            showdckWidgetChkBox->hide();
        }@

    This means that only once the hide or show will work.

    On the same place you should use a connect :
    Use the checkbox as sender and the dockwidget uses a slot to act on that.

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  • example code
    @connect(ui->checkBox, SIGNAL(toggled(bool)), ui->dockWidget, SLOT(setHidden(bool)));@

    of course you should adapt the widget names to your needs.

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  • [quote author="Eddy" date="1310895955"]example code
    @connect(ui->checkBox, SIGNAL(toggled(bool)), ui->dockWidget, SLOT(setHidden(bool)));@

    of course you should adapt the widget names to your needs.[/quote]

    Okay, thanks, that worked, but another bug, =/. But when it is checked, it's hidden, =/.

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  • @
    connect(ui->checkBox, SIGNAL(toggled(bool)), ui->dockWidget, SLOT(setVisible(bool)));
    @

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  • [quote author="loladiro" date="1310898744"]@
    connect(ui->checkBox, SIGNAL(toggled(bool)), ui->dockWidget, SLOT(setVisible(bool)));
    @[/quote]

    Heh, awesome, thanks for the help, that worked, sorry, I should have known this, as much as I've been studying Qt, you'd think, by now, after 3 or more months, I know it all, hahaha.. Honestly, I don't, it's due to my laziness and not doing anything other than Menus and QTextEdits, decided to try something different for a change, and so far, heck yeah, =). Thanks again.

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  • if you want to learn about signals and slots :

    "this is a must have read :":http://doc.qt.nokia.com/4.7/signalsandslots.html

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  • [quote author="Eddy" date="1310900176"]if you want to learn about signals and slots :

    "this is a must have read :":http://doc.qt.nokia.com/4.7/signalsandslots.html[/quote]

    Looks to me like almost all things in Qt requires Sigs/Slots..

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  • Hi Richard,

    not all but it is very usefull and ion many places needed :-)
    Especially for UI inetraction or for asynchronous things.

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  • [quote author="Gerolf" date="1310903850"]Hi Richard,

    not all but it is very usefull and ion many places needed :-)
    Especially for UI inetraction or for asynchronous things.[/quote]

    Heh, have to write more codes it appears, when a user clicks the X, the Checkbox doesn't automatically Uncheck. Also, having an issue with getting the DockWidget to stay small, I did get it so it stays at bottom, but now it's onto learning how to make it resize, tried the dckwidget->setGeometry(0, 150, 1024, 100); but it didn't appear to do anything, =/. It still stays just as large as the parent window.

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  • You need to emit a signal from the dockwidget and connect it with a slot of the checkbox.

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  • [quote author="Eddy" date="1310905367"]You need to emit a signal from the dockwidget and connect it with a slot of the checkbox.[/quote]

    Argh, too sleepy to understand now, ahahaha.. That just went over my head, later I'll get to it, LOL..

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  • It's not that difficult.
    Hint : Use the same approach as before. Look for a signal and slot with a bool argument.

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