Colored Buttons

[Walsi]

but the button is still gray!

[Walsi]

arrrr it is green!!!

I even dont know what my mistake was!!

How can i use colors which are net predefined??

Is it possible to enter anywhere a RGB code???

Or something else?

Best Regards, and thx

[marcel]

Yes, you can construct a custom color with QColor( R, G, B ).
Look at QColor.

Regards

[Walsi]

Yes, you can construct a custom color with QColor( R, G, B ).
Look at QColor.

Regards

Another basic question from me: Is a QPushButton able to blink??

For example: gray --> green --> gray --> green

Best Regards!

[marcel]

Yes, if you use a QTimer, with let's say a 200ms delay. In the timerEvent slot you just switch the color from gray to green and then back.

Regards

[Walsi]

Yes, if you use a QTimer, with let's say a 200ms delay. In the timerEvent slot you just switch the color from gray to green and then back.

Regards

How can I find out which gray is the standard gray!!!! So that the Button looks like a button with no specific color??



Best Regards?

[jpn]

A few notes:

It is a good practice to get the palette from a widget, modify it, and set it back. Constructing a new palette object makes it use application's default palette which means losing any possible previous modifications to widget's palette:

QPalette palette = widget->palette();
palette.setColor(...);
widget->setPalette(palette);

QPalette palette = widget->palette();
palette.setColor(...);
widget->setPalette(palette);

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For a button, the correct color group is QPalette::Button:

QPalette palette = button->palette();
palette.setColor(QPalette::Button, Qt::green);
button->setPalette(palette);

QPalette palette = button->palette();
palette.setColor(QPalette::Button, Qt::green);
button->setPalette(palette);

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QWindowsXpStyle and QMacStyle use native theming engines which cause some palette modifications not to have any effect. Certain colors/brushes/whatever come from the underlying system. Style sheets is the solution to this problem. Follow the link and see the example of changing QPushButton's color there.

[Walsi]

I got a runtime exception: Segmentation fault!

[Walsi]

Now I tried a solution which causes no error and which seems to be working.

My code is looking like that:

I generate my own color out from a RGB code (also with alpha Parameter)

QColor myColor;
mycolor.setRgb(0, 150, 0, 255);
 
...
...
...
 
myButton->setPalette(QPalette(Qcolor(myColor)));

QColor myColor;
mycolor.setRgb(0, 150, 0, 255);

...
...
...

myButton->setPalette(QPalette(Qcolor(myColor)));

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It works fine!

Best Regards,...

[wysota]

Now try changing your application to a different style... Especially try the WindowsXP style.

[Walsi]

give me a hint, please!

[TheRonin]

give me a hint, please!

QColor oldButtonColor = pushButton->palette().color(QPalette::Button);

QColor oldButtonColor = pushButton->palette().color(QPalette::Button);

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[aamer4yu]

Walsi, which OS were you using ??
I was using the same code to change the color of the button...
setPalette(QPalette(QColor(m_color)));
but i was using the button as Flat, and hence the color showed properly. I removed the flat property and it doesnt draw color on the button... i tried various roles like QPalette::Button , etc to change the color, but still no help

Is it bec as Jpn suggested that native themes cause some effects not to have the desired effect ??

[Walsi]

Now I tried a solution which causes no error and which seems to be working.

My code is looking like that:

I generate my own color out from a RGB code (also with alpha Parameter)

QColor myColor;
mycolor.setRgb(0, 150, 0, 255);
 
...
...
...
 
myButton->setPalette(QPalette(Qcolor(myColor)));

QColor myColor;
mycolor.setRgb(0, 150, 0, 255);

...
...
...

myButton->setPalette(QPalette(Qcolor(myColor)));

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It works fine!

Best Regards,...

I use this code for changing the color of buttons and my operating system is KUBUNTU!
I think version 6.10

[aamer4yu]

Did u try it on windows ??

[Walsi]

What do you mean???

Compiling this SourceCode on Windows?

No I didn't try that.

Best Regards

[wysota]

If your code is meant to run on Windows too then I suggest you do that now and run it under WinXP.

[Walsi]

My code isn't suggested to run under WXP .... net yet??

Will there be much problems with colored buttons on WXP?

[wysota]

Just try it and you're see for yourself. If you ever plan to run the application on Windows or MacOSX, I suggest you check out the "red button issue" on all platforms

[Walsi]

Okay,...

I will!