Re: Eventbox doesn't work with a Gtk::Button?

[Nickolai Dobrynin <dobrynin cs uwm edu>]

The simplest would probably be to derive from Gtk::Button and overriding the on_pressed
call back.  This way, you avoid doing things like

>  m_EventBox.set_events(Gdk::BUTTON_PRESS_MASK);
>  m_EventBox.signal_button_press_event().connect(sigc::mem_fun(*this, &ExampleWindow::on_eventbox_button_press) );

If, on the other hand, it is your intention to register an additional call back for the
"pressed" event, then you should do 

m_Button.signal_pressed().connect .................

instead of the second line above, or otherwise you make the event box receive the "pressed" event rather than
the button itself.  Thus, I also think that the first line (the one with set_event) should be removed.


Regards,

Nickolai


PS  Unless HeavyJoost is your real name, I think, people on this list tend to use their actual names for posting.



On Wed, Oct 19, 2005 at 10:57:38PM +0200, HeavyJoost wrote:
> In the following code, when I change m_Label to a Gtk::Button, it 
> doesn't receive events anymore, is this normal? If so, how can I do that 
> for buttons?
> 
> #include <gtkmm/main.h>
> #include <gtkmm.h>
> 
> class ExampleWindow : public Gtk::Window
> {
> public:
>  ExampleWindow();
>  virtual ~ExampleWindow();
> 
> protected:
>  //Signal handlers:
>  virtual bool on_eventbox_button_press(GdkEventButton* event);
> 
>  //Child widgets:
>  Gtk::EventBox m_EventBox;
>  Gtk::Label m_Label;
>  Gtk::Tooltips m_Tooltips;
> };
> 
> ExampleWindow::ExampleWindow()
> : m_Label("Click here to quit, quit, quit, quit, quit")
> {
>  set_title ("EventBox");
>  set_border_width(10);
> 
>  add(m_EventBox);
> 
>  m_EventBox.add(m_Label);
> 
>  //Clip the label short:
>  m_Label.set_size_request(110, 20);
> 
>  //And bind an action to it:
>  m_EventBox.set_events(Gdk::BUTTON_PRESS_MASK);
>  m_EventBox.signal_button_press_event().connect(
>    sigc::mem_fun(*this, &ExampleWindow::on_eventbox_button_press) );
> 
>  m_Tooltips.set_tip(m_EventBox, "Click me!");
> 
>  show_all_children();
> }
> 
> ExampleWindow::~ExampleWindow()
> {
> }
> 
> bool ExampleWindow::on_eventbox_button_press(GdkEventButton*)
> {
>  hide();
>  return true;
> }
> 
> int main(int argc, char *argv[])
> {
>  Gtk::Main kit(argc, argv);
> 
>  ExampleWindow window;
>  Gtk::Main::run(window); //Shows the window and returns when it is closed.
> 
>  return 0;
> }
> 
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