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Thread: Disable button click

  1. #1
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    Question Disable button click

    How would it be possible to make a button not aceept clicks?
    I have clicked it once and set an icon to it..and now I don't want to disable it(because icon goes grey >.<),but I want to keep it enabled,with no clicks..

    Thank you.

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    Default Re: Disable button click

    You can disconnect or block signals.

  3. The following user says thank you to Zlatomir for this useful post:

    "BumbleBee" (25th March 2011)

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    Default Re: Disable button click

    Yeah,I disconnected it!

    Thank you.

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    Default Re: Disable button click

    Just a note - that sort of behavior has the potential to be very frustrating to users. Clicking a button that looks and behaves as if it is active and having it do nothing indicates that something isn't right, that the program has failed in some way.

    I'd suggest changing the button's appearance in some way to indicate that it has fulfilled its one-shot role.

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    Default Re: Disable button click

    Quote Originally Posted by SixDegrees View Post
    Just a note - that sort of behavior has the potential to be very frustrating to users. Clicking a button that looks and behaves as if it is active and having it do nothing indicates that something isn't right, that the program has failed in some way.

    I'd suggest changing the button's appearance in some way to indicate that it has fulfilled its one-shot role.
    Well,you have a point.
    But that would be so in a normal program,while I'm creating a tic tac toe game,so I need to disable a used button.Won't the user understand that the button is used,so it's not working?

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    Default Re: Disable button click

    That's a call you'll have to make for yourself. There are always exceptions. As a general rule, though, it's often a bad idea to tinker with normal GUI behaviors.

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    Default Re: Disable button click

    Hey guys,how can I check for winner?
    I cannot check,because buttons have no value(or sth..)..so I'd do: if(btn[0] == x && btn[1] == x && btn[2] == x )

    Thank you.

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    Default Re: Disable button click

    There are several approaches. First, you can derive a trivial extension of QPushButton that can be assigned a value depending on state, row and column or whatever.

    Better would be to completely sever any connection between application logic and application UI, and have the buttons manipulate some underlying data structure that ultimately drives game logic. This makes it easy to replace the UI with a different one while leaving the rest of the program unchanged. For more information, look up the "Model/View/Controller".

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    Default Re: Disable button click

    Quote Originally Posted by SixDegrees View Post
    There are several approaches. First, you can derive a trivial extension of QPushButton that can be assigned a value depending on state, row and column or whatever.

    Better would be to completely sever any connection between application logic and application UI, and have the buttons manipulate some underlying data structure that ultimately drives game logic. This makes it easy to replace the UI with a different one while leaving the rest of the program unchanged. For more information, look up the "Model/View/Controller".
    When you say subclass(derive) and assign values,do you mean,like putting the array of buttons in that class(as objects) and add another int variable,which will be assigned 1 when buttons gets 'x' icon and o when it gets 'o' icons?

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    Default Re: Disable button click

    I cannot check,because buttons have no value(or sth..)
    you can use setProperty to set a "x" and "0" and access it by callling property

    it will be like ,
    when you set property
    btn[0]->setProperty("marked",false);

    when you access, if(btn[0]->property("marked").toBool())

    hope it helps
    bala
    Last edited by BalaQT; 26th March 2011 at 17:15. Reason: ex code added

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    Default Re: Disable button click

    Quote Originally Posted by BalaQT View Post
    you can use setProperty to set a "x" and "0" and access it by callling property

    it will be like ,
    when you set property
    btn[0]->setProperty("marked",false);

    when you access, if(btn[0]->property("marked").toBool())

    hope it helps
    bala
    My code is:
    Qt Code:
    1. if(btn[0]->property("x").toBool() && btn[1]->property("x").toBool() && btn[2]->property("x").toBool())
    2. //msgBox here.;
    To copy to clipboard, switch view to plain text mode 

    And it gives a bug,when I press any btn,the msg appears(i mean without completing a line of Xs..it skips everything on first click....)

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    Default Re: Disable button click

    Quote Originally Posted by "BumbleBee" View Post
    My code is:
    Qt Code:
    1. if(btn[0]->property("x").toBool() && btn[1]->property("x").toBool() && btn[2]->property("x").toBool())
    2. //msgBox here.;
    To copy to clipboard, switch view to plain text mode 

    And it gives a bug,when I press any btn,the msg appears(i mean without completing a line of Xs..it skips everything on first click....)
    I'm not sure, but may be u should try
    Qt Code:
    1. if(btn[0]->property("x").toBool()==true && btn[1]->property("x").toBool()==true && btn[2]->property("x").toBool()==true)
    To copy to clipboard, switch view to plain text mode 

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    Default Re: Disable button click

    @Archa4: it does not make any difference, "true==true" and "false==true" evaluates to "true" and "false" respectively

    Show the code where you assign the "x" property, maybe you set it to "true" for all the buttons.

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    Default Re: Disable button click

    hi, bumblebee
    as stampede mentioned, you need to check your logic,
    And it gives a bug,when I press any btn,the msg appears
    its the logical issue.
    post setProperty code here

    bala

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    Default Re: Disable button click

    Well I did what BalaQT said,but I know realised that I didn't put the false after text...does it change things?

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    Default Re: Disable button click

    I know realised that I didn't put the false after text.does it change things?
    yes, that will correct your problem. if you still not able to solve the problem, post the setProperty code here.

    bala

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    Default Re: Disable button click

    Well,no I still get the bug...
    The code is:
    Qt Code:
    1. void TicTacToe::btnChangeX(QPushButton * x) //this function is run on every pressed button
    2. {
    3. x->setIcon(QIcon("ex.png"));
    4. x->setIconSize(QSize(64,64));
    5. x->disconnect();
    6. x->setProperty("x",false); //here is set it to x,false
    7. lbl->setText("<b>Turn : Player 2</b>");
    8. turn = false;
    9. }
    10.  
    11. bool TicTacToe::winX() //this function is called to every btn as well and checks for winner
    12. {
    13. if(btn[0]->property("x").toBool() && btn[1]->property("x").toBool() && btn[2]->property("x").toBool())
    14. {
    15.  
    16.  
    17. btn[0]->setText("x won 1"); //here is the bug,although i did click only btn[0],the winner text has appeared....
    18. for(i; i < 9; i++)
    19. btn[i]->disconnect();
    20.  
    21. return true;
    22. }
    To copy to clipboard, switch view to plain text mode 

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    Default Re: Disable button click

    "x" is an existing property name. Use something that doesn't exist, like:
    Qt Code:
    1. button->setProperty("I need to read Qt documentation more", true);
    To copy to clipboard, switch view to plain text mode 
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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    Default Re: Disable button click

    Quote Originally Posted by wysota View Post
    "x" is an existing property name. Use something that doesn't exist, like:
    Qt Code:
    1. button->setProperty("I need to read Qt documentation more", true);
    To copy to clipboard, switch view to plain text mode 
    Ok thanks it works now.

  21. #20
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    Default Re: Disable button click

    Can someone tell me,why the icon doesn't show in /Debug?
    At runtime it's ok,but

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