[gtkmm] Mouse problems

["Stephens, Ben J (UK)" <ben j stephens baesystems com>]

Hi,

I'm having a little trouble with keyboard and mouse events at the moment, and if anyone out there could help I would be most grateful. Firstly, the program below is supposed to catch mouse movement and mouse clicks, but it doesn't (none of the messages are ever printed), and I have no idea why. I also don't understand why only the root widget sees keyboard events - if I try to capture keyboard events in a child widget, regardless of whether it is in focus or not, it cannot receive keyboard input.

If anyone can provide enlightenment to my situation I would be most grateful! Thanks in advance

Ben Stephens

-----------------------------------------------------------------------------

#include <gtkmm/widget.h>
#include <gtkmm/window.h>
#include <gtkmm/main.h>
#include <iostream>
using namespace std;

class MainWindow : public Gtk::Window
{
	public:
		MainWindow();
		bool testfunc(GdkEventButton *event);
		
	protected:
		virtual bool on_button_press_event(GdkEventButton *event);
		virtual bool on_key_press_event(GdkEventKey *event);
		virtual bool on_motion_notify_event(GdkEventMotion* event);
};

MainWindow::MainWindow()
{
	// Shouldn't be neccessary, but I have no better ideas...
	signal_button_press_event().connect(SigC::slot(*this, &MainWindow::testfunc));
}

// This is never called
bool MainWindow::testfunc(GdkEventButton *event)
{
	cout << "Button pressed - testfunc" << endl;
	return false;
}

// Nor is this
bool MainWindow::on_button_press_event(GdkEventButton *event)
{
	cout << "Button pressed" << endl;
	
	Gtk::Widget::on_button_press_event(event);
	return false;
}

// Works fine
bool MainWindow::on_key_press_event(GdkEventKey *event)
{
	cout << "Key pressed" << endl;
	
	Gtk::Widget::on_key_press_event(event);
	return false;
}

// Also never called
bool MainWindow::on_motion_notify_event(GdkEventMotion* event)
{
	cout << "Motion detected" << endl;
	
	Gtk::Widget::on_motion_notify_event(event);
	return false;
}

int main(int argc, char **argv)
{
	Gtk::Main kit(argc, argv);
	MainWindow wind;
	Gtk::Main::run(wind);
	return(0);
}

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