[SOLVED] TRadiogroup selection changed event

[BigChimp]

Hi all,

I'm sure many of you know the answer to this one: I want to know if a user selected a new/different item in a TRadioGroup. I can't seem to find any event of the RadioGroup control....

Having no Delphi background, I must be overlooking something simple...

Thanks,
BigChimp

[felipemdc]

I could be overlooking too, but it seams to be missing. I also couldnt find it in Delphi docs:

http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/!!MEMBEROVERVIEW_ExtCtrls_TRadioGroup.html

If this is really the case we could add OnSelectionChanged for example.

[BigChimp]

Felipe, sounds good. Do you want me to raise a bug in mantis?

[felipemdc]

I researched a bit more and I found the "gotcha", OnClick reacts to other selections too, like keyboard up/down arrow:

http://www.tek-tips.com/viewthread.cfm?qid=589219

And tested here in LCL-gtk2 and it indeed works like that. But this doesn't exclude the idea of having a better named event too, which would do the same thing. But I am very busy these days ... but yes, please open a bug about it.

[ludob]

D6 didn't have a special event in TRadioGroup neither. The OnClick event is  is what you need.

D6 help for Onclick:

Code: [Select]

Usually OnClick occurs when the user presses and releases the left mouse button with the mouse pointer over the control. This event can also occur when

-The user selects an item in a grid, outline, list, or combo box by pressing an arrow key.
-The user presses Spacebar while a button or check box has focus.
-The user presses Enter when the active form has a default button (specified by the Default property).
-The user presses Esc when the active form has a cancel button (specified by the Cancel property).
-The user presses the accelerator key for a button or check box. For example, if the value of the Caption property of a check box is '&Bold', the B is underlined at runtime and the OnClick event of the check box is triggered when the user presses Alt+B.
-The Checked property of a radio button is set to True
-The value of the Checked property of a check box is changed.
-The Click method of a menu item is called.


[BigChimp]

Thanks all.
Submitted feature request to bugtracker:
http://bugs.freepascal.org/view.php?id=21155