On 2017-12-26 12:03, Chris Vine wrote:
On Tue, 26 Dec 2017 10:56:34 +0100
Klaus Rudolph <[email protected]> wrote:
The function "signal_button_press_event()" reacts only if I double
click the button. Is it possible to react also on a single press
event?
#include <iostream>
#include <gtkmm.h>
#include <gtkmm/window.h>
class ExampleWindow: public Gtk::Window
{
Gtk::Button button;
public:
ExampleWindow(): button("Hallo")
{
add(button);
button.signal_button_press_event().connect( [this](
GdkEventButton* ev)->bool{ std::cout << "Press" << std::endl; return
true; });
}
};
int main(int argc, char* argv[])
{
Gtk::Main kit(argc, argv);
ExampleWindow window;
window.show_all_children();
Gtk::Main::run(window);
return 0;
}
button-press-event is a GDK event and is concerned principally with
mouse buttons. You want the clicked signal.
If you do prefer signal_button_press_event(), connect your signal
handler so it's called before the default handler.
button.signal_button_press_event().connect(......., false);
See
https://developer.gnome.org/gtkmm-tutorial/stable/sec-xeventsignals.html.en
If you connect your signal handler to run before the default signal
handler, and your handler returns true, the default handler will not be
called.
Kjell
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