GtkListBoxRow signal

Platform
1

Hello everyone

I have a GtkListBox with a GtkListBoxRow. Same as the left panel of Gnome Contact.
What signal is emitted when hovering the mouse over GtkLisBoxRow so that I can do the same effect as Gnome Contact, to display a GtkCheckButton
I’ve tried enter-notify-event and leave-notify-event but it didn’t work.

2

In GTK3, GtkListBoxRow doesn’t receive events because it doesn’t have its own GdkWindow. In general, you can connect to event signals on the GtkListBox, and call gtk_list_box_get_row_at_y().

Contacts takes advantage of the fact that GtkListBox already does this to update the row’s state: https://gitlab.gnome.org/GNOME/gnome-contacts/-/blob/master/src/contacts-contact-list.vala#L88-94

Another option would be to insert a GtkEventBox between the GtkListBoxRow and its child.

2 Likes
3

My friend thanks for the tip. Now it worked. I connected the state-flags-changed signal. and now it works. By hovering the mouse over the GtkListBoxRow I can display my GtkCheckButton.

static void
on_box_row_houver (GtkWidget *object,
				   GtkStateFlags flags,
                   gpointer      user_data)
{
	FncBoxRowView *row;
	
	
	
	row = FNC_BOX_ROW_VIEW (user_data);
		
	if (flags == 128)
	 gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), TRUE);
	else
		gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), FALSE);

}

However if I check the GTK_STATE_FLAG_PRELIGHT it does not work because the flags return the numbers 128 o move the mouse over the GtkListBoxRow and 130 when the mouse leaves the GtkListBoxRow

Don’t work.

static void
on_box_row_houver (GtkWidget *object,
			       GtkStateFlags flags,
                   gpointer      user_data)
{
	FncBoxRowView *row;
	
	
	
	row = FNC_BOX_ROW_VIEW (user_data);
		
	if (flags == GTK_STATE_FLAG_PRELIGHT)
	 gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), TRUE);
	else
		gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), FALSE);

}
4

I researched and found that 128 is Gdk Cursor Type Target and 130 Gdk Cursor Type Cross

5

This code work

static void
on_box_row_houver (GtkWidget *object,
GtkStateFlags flags,
gpointer user_data)
{
FncBoxRowView *row;

row = FNC_BOX_ROW_VIEW (user_data);
	
if (flags == GDK_TARGET)
 gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), TRUE);
else
	gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), FALSE);

}

but it shows warning:
…/src/gui/fnc-box-row-view.c:44:12: warning: comparison between ‘GtkStateFlags’ {aka ‘enum ’} and ‘enum ’ [-Wenum-compare]
44 | if (flags == GDK_TARGET)

6

GdkCursor is an unrelated enum type that just happens to contain matching values.

GtkStateFlags is not a regular enum type, but a collection of bit flags (as indicated by the suffix ‘Flags’)

To test if GTK_STATE_FLAG_PRELIGHT is set in flags, you can use bitwise AND:

if (flags & GTK_STATE_FLAG_PRELIGHT) { ... }

For the record, the value 130 of GtkStateFlags is:
GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_DIR_LTR

7

Thank you my friend. It’s work.

GtkStateFlags flag = gtk_widget_get_state_flags (GTK_WIDGET (row)); 	
if (flag & GTK_STATE_FLAG_PRELIGHT)
   gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), TRUE);
else
   gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), FALSE);

if (flag & GTK_STATE_FLAG_SELECTED)
   gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer), TRUE);
8

You could shorten that to something like this if you like:

gtk_revealer_set_reveal_child (GTK_REVEALER (row->revealer),
    (flag & (GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED)) != 0);

Also, I’m not sure why you’re calling gtk_widget_get_state_flags() if you’re in a state-flags-changed signal handler where that is provided for you as an argument.

9

If I don’t get the gpointer state flag I have a bag.
If I put the mouse on top of the row it doesn’t activate, just when I leave the mouse on top of the row it displays the check button

10

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