On 24-9-2012 23:59, Johan Engelen wrote:
On 24-9-2012 13:16, Arshdeep Singh wrote:
Now I face a problem in editing the ' RegisteredCheckButton:<GtkWidget>CheckButton' class '
please be extra careful in typing class names in e-mails! This above does not make much sense actually :-)
I added a function 'void setGray(RegisteredChekcButton* ,bool b) to the class definition, obviously the declaration in the <registered-widget.h> and the definition in <registered-widget.cpp>
void setGray (RegisteredCheckButton* A , bool b) { gtk_toggle_set_active ( (GtkToggleButton*) A , !b); }
The object hierarchy shows that GtkCheckButton derives from GtkToggleButton, so this should work. This showed the error that you cannot convert RegisteredCheckButton* to GtkToggleButton* .
It's because RegisteredCheckButton is not derived from GtkCheckButton. It is derived from Gtk::CheckButton (subtle difference!).
But, the RegisteredCheckButton already has a method to gray-out the box: void RegisteredCheckButton::setActive (bool b) Does that not do want you want?
Err, sorry for the mistake. The setActive method makes the checkbox checked (or not), perhaps we should rename that.
To implement what you want, have a look at RegisteredCheckButton::setActive, because it shows how to forward the setting to its slave buttons. (You will have to write some if-statements: If the checkbutton is grayed-out, its slaves should be gray-out too. If the checkbutton is not grayed-out, its slaves should be grayed-out only if the checkbutton is not active, etc.) As setActive does with set_active(bool), you can simply call set_sensitive(bool) without any casts from within a method of RegisteredCheckButton to gray out the checkbutton.
Cheers, Johan