RE: Text Entry and GdkCrossingEvents

["Aaron Geier" <ageier catalystmicro com>]

Hello,

The following is a test program that should compile (I apologize if it
doesn't compile; I had to do a re-type of the program):

#include <iostream>
#include <gtkmm.h>

Class LevelEntry : public Gtk::Entry
{
	public:
		LevelEntry();
		~LevelEntry();
	protected:
		bool on_enter_notify_event(GdkEventCrossing *event);
};

LevelEntry::LevelEntry()
{
	set_max_length(3);
	set_width_chars(4);
	set_text("");
	set_events(Gdk::ENTER_NOTIFY_MASK);
}

bool LevelEntry::on_enter_notify_event(GdkEventCrossing *event)
{
	static long count;
	if(event->type == GDK_ENTER_NOTIFY)
		cerr << "Enter " << count << endl;
	count++;
	return true;
}

LevelEntry::~LevelEntry()
{

}

Class MyWindow : public Gtk::Window
{
	public:
		MyWindow();
		virutal ~MyWindow();

		LevelEntry m_LevelEntry;
		Gtk::Vbox m_VBox;
		Gtk::ScrolledWindow m_ScrolledWindow;
};

MyWindow::MyWindow()
{
	set_title("Test");
	set_default_size(1024,768);
	resize(1024,768);
	set_border_width(5);
	set_decorated(false);
	add(m_VBox);
	m_ScrolledWindow.set_policy(Gtk::POLICY_AUTOMATIC,
GTK::POLICY_AUTOMATIC);
	m_VBox.pack_start(m_ScrolledWindow);
	m_VBox.pack_start(m_LevelEntry);
	show_all_children();
}

MyWindow::~MyWindow()
{
}

int main(int argc, char *argv[])
{
	Gtk::Main kit(argc,argv);
	MyWindow main_window;
	Gtk::Main::run(main_window);
	return(0);
}
}



-----Original Message-----
From: Jonathon Jongsma [mailto:jonathon jongsma gmail com] 
Sent: Tuesday, August 28, 2007 12:01 PM
To: Aaron Geier
Cc: gtkmm-list gnome org
Subject: Re: Text Entry and GdkCrossingEvents

On 8/28/07, Aaron Geier <ageier catalystmicro com> wrote:
> Hello,
>
>  I've created a custom class that uses the Gtk::Entry widget.
>
>  In this custom class, I've overridden the on_enter_notify event.  I
have
> used the set_events() command in the constructor using only the Gdk
entry
> notify mask as a parameter.
>
>  A problem that I'm having is that this event call back is getting
called
> multiple times when I cross my mouse over the widget, even though I
only
> enter the widget once.  For what I'm trying to do, this should only
happen
> once when I enter the widget.
>
> I've noticed two things:
>
> 1)       I've tried using the set_has_frame(true) [which is the
default],
> and the event callback is called when my mouse touches the frame, and
then
> again when my mouse goes over the "text box" and my cursor changes
from a
> pointer to a "text-edit" cursor.  The event callback is called a total
of
> two times.
>
> 2)       I've tried using the set_has_frame(false), and the event
callback
> is called 3 times.  As soon as my mouse touches the widget, it
immediately
> is changed to the "text-edit" cursor, and the callback is called 3
times.
>
> Does anyone know why this callback is being called multiple times,
even
> though the mouse only enters the widget once?

Maybe somebody else will have ideas just from your description above,
but for me it would help to have a minimal compilable test case that I
can look at and see what you're talking about.

-- 
jonner