Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
On Mon, 2005-01-10 at 01:17 -0600, Greg Breland wrote: Did a bug ever get filed on this? I can't seem to find it if there was. I have a pretty good usage scenario that is quite common with database applications. The combo control is the most common control used with DB apps and contains values pulled from a different database table than the data being displayed. Populating all the combo controls on a form when it is created would result in dozens of DB queries that are not needed since most of the time the user is just looking at the data and not actively editing. Anyone writing an app where populating a combo control isn't just a static list but has some overhead will need a popup event for the combo control. Thats bug 162531 Matthias ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Did a bug ever get filed on this? I can't seem to find it if there was. I have a pretty good usage scenario that is quite common with database applications. The combo control is the most common control used with DB apps and contains values pulled from a different database table than the data being displayed. Populating all the combo controls on a form when it is created would result in dozens of DB queries that are not needed since most of the time the user is just looking at the data and not actively editing. Anyone writing an app where populating a combo control isn't just a static list but has some overhead will need a popup event for the combo control. On Sun, 2004-11-21 at 12:19, Jan-Marek Glogowski wrote: Hi I added a patch for a popup event to my first reply. I wanted to file a bug report, but didn't really come up with a good case. There was a similar request a few days ago: Accessing GtkComboBoxEntry's toggle button. The patch is very simple - just two gtk_signal_emit, a return value to cancel popup and the signal definition ~20 lines of code. Jan-Marek ___ gtk-list mailing list gtk-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Hi Egon
This is a hack, but I it should work:
static void combo_toggle_func( GtkToggleButton
*togglebutton, gpointer user_data )
{
// Do your menu stuff
}
static void scan_children( GtkWidget *w, gpointer data )
{
if( GTK_IS_TOGGLE_BUTTON( w ) ) {
g_print( Found Button!\n );
g_signal_connect( w, toggled,
G_CALLBACK( combo_toggle_func ), NULL );
}
}
gtk_container_forall( GTK_CONTAINER( my_combo ), scan_children, NULL );
I have also attached a patch to add a popup event (diff against v2.5.5).
Maybe you can try it and report results to the list, so it could be
included in the 2.6 release.
HTH
Jan-Marek
GtkComboBox popup patch:
--- gtkcombobox.c.old 2004-11-09 17:38:57.0 +0100
+++ gtkcombobox.c 2004-11-21 10:44:58.0 +0100
@@ -181,6 +181,7 @@
enum {
CHANGED,
+ POPUP,
LAST_SIGNAL
};
@@ -522,6 +523,15 @@
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
+ combo_box_signals[POPUP] =
+g_signal_new (popup,
+ G_OBJECT_CLASS_TYPE (klass),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GtkComboBoxClass, popup),
+ NULL, NULL,
+ _gtk_marshal_BOOLEAN__VOID,
+ G_TYPE_BOOLEAN, 0);
+
/* properties */
g_object_class_install_property (object_class,
PROP_MODEL,
@@ -1490,12 +1500,20 @@
{
gint x, y, width, height;
GtkTreePath *path, *ppath;
+ gboolean do_popup = TRUE;
g_return_if_fail (GTK_IS_COMBO_BOX (combo_box));
if (GTK_WIDGET_MAPPED (combo_box-priv-popup_widget))
return;
+ g_signal_emit_by_name (combo_box, popup, do_popup);
+ if (do_popup == FALSE) {
+gtk_toggle_button_set_active
+ (GTK_TOGGLE_BUTTON (combo_box-priv-button), FALSE);
+return;
+ }
+
if (GTK_IS_MENU (combo_box-priv-popup_widget))
{
gtk_combo_box_menu_popup (combo_box, 0, 0);
@@ -2593,10 +2611,18 @@
gpointeruser_data)
{
GtkComboBox *combo_box = GTK_COMBO_BOX (user_data);
+ gboolean do_popup = TRUE;
if (GTK_IS_MENU (combo_box-priv-popup_widget)
event-type == GDK_BUTTON_PRESS event-button == 1)
{
+ g_signal_emit_by_name (combo_box, popup, do_popup);
+ if (do_popup == FALSE) {
+gtk_toggle_button_set_active
+ (GTK_TOGGLE_BUTTON (combo_box-priv-button), FALSE);
+return TRUE;
+ }
+
if (combo_box-priv-focus_on_click
!GTK_WIDGET_HAS_FOCUS (combo_box-priv-button))
gtk_widget_grab_focus (combo_box-priv-button);
--- gtkcombobox.h.old 2004-08-16 07:43:50.0 +0200
+++ gtkcombobox.h 2004-11-21 08:50:29.0 +0100
@@ -51,12 +51,12 @@
/* signals */
void (* changed) (GtkComboBox *combo_box);
+ gboolean (* popup)(GtkComboBox *combo_box);
/* Padding for future expansion */
void (*_gtk_reserved0) (void);
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
- void (*_gtk_reserved3) (void);
};
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Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Jan-Marek Glogowski wrote:
Hi Egon
This is a hack, but I it should work:
static void combo_toggle_func( GtkToggleButton
*togglebutton, gpointer user_data )
{
// Do your menu stuff
}
static void scan_children( GtkWidget *w, gpointer data )
{
if( GTK_IS_TOGGLE_BUTTON( w ) ) {
g_print( Found Button!\n );
g_signal_connect( w, toggled,
G_CALLBACK( combo_toggle_func ), NULL );
}
}
gtk_container_forall( GTK_CONTAINER( my_combo ), scan_children, NULL );
I have also attached a patch to add a popup event (diff against v2.5.5).
Maybe you can try it and report results to the list, so it could be
included in the 2.6 release.
HTH
Jan-Marek
Thanks Jan-Marek,
I've experimented with the above 'hack'.
Unfortunately no toggle_button is found during the child-scan.
Actually the scan found only one widget in the gtkcomboboxentry, which
to me seems quite strange as I would have expected at least two.
(Checke by setting another print-statement in the scan_children())
I haven't been able to determine which widget it actually detected, as I
hevent found any good way of getting the type extracted from the widget
in a human readable way.
Do you have any clue on what is going on here?
Best regards
Egon Andersen
(Also things like the GTK_IS_TOGGLE_BUTTON() macro is not found in the
documents - okay, it is defined in the header-file, but it is missing in
the GTK+ Reference Manual for GtkToggleButton)
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Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Just checked the source for 2.4.13 and 2.5.5. Both use a
GtkToggleButton...
Check the following scan function - should print a list of found object
types:
static void scan_children( GtkWidget *w, gpointer data )
{
g_print( %s\n, G_OBJECT_TYPE_NAME( w ) );
}
For me it finds:
GtkToggleButton
GtkEntry
About GTK_IS_... macro:
There are six std macros defined by every Gtk+ class. They are used for:
2* type checks (GTK_IS_...[_CLASS])
2* obj casts (GTK_...[_CLASS]), e.g. GTK_BIN( my_combo )-child
1* the type system internal type (GTK_TYPE_...)
1* get the objs class (GTK_..._GET_CLASS)
E.g. if you look into the code, you will find a lot of
g_return_if_fail( GTK_IS_...( combo ) );
For more information read the Gtk+ tutorial and
http://www.le-hacker.org/papers/gobject/
And be sure you use gtk_container_forall not gtk_container_foreach!
Jan-Marek
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Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Jan-Marek Glogowski wrote:
Just checked the source for 2.4.13 and 2.5.5. Both use a
GtkToggleButton...
Check the following scan function - should print a list of found object
types:
static void scan_children( GtkWidget *w, gpointer data )
{
g_print( %s\n, G_OBJECT_TYPE_NAME( w ) );
}
For me it finds:
GtkToggleButton
GtkEntry
Unfortunately I only get GtkEntry :-(
I've checked that the first argument to gtk_container_forall() is a
GtkComboBoxEntry
And according to printout from the callback it has only one child which
in an GtkEntry.
According to the documentation on my machine it should be 2.4.13 I have
on my FC3 - this is really strange!
The test you ran was that on a 2.4.13 or 2.5.5 or both?
About GTK_IS_... macro:
There are six std macros defined by every Gtk+ class. They are used for:
2* type checks (GTK_IS_...[_CLASS])
2* obj casts (GTK_...[_CLASS]), e.g. GTK_BIN( my_combo )-child
1* the type system internal type (GTK_TYPE_...)
1* get the objs class (GTK_..._GET_CLASS)
Thanks for the explanation.
E.g. if you look into the code, you will find a lot of
g_return_if_fail( GTK_IS_...( combo ) );
For more information read the Gtk+ tutorial and
http://www.le-hacker.org/papers/gobject/
I think these six macros should also be in the reference manual.
I expect to be able to find any (public) available function/macro in the
reference manual.
And be sure you use gtk_container_forall not gtk_container_foreach!
I checked in the reference manual before use - and know the difference!
But thanks for pointing it out.
Best regards
Egon Andersen
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Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
I checked my program with 2.5.5. And had a look at the ComboBox code: the toggle button is created when setting the style, so I think the box must be (at least) realized, maybe even shown. HTH Jan-Marek ___ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
On Sun, 2004-11-21 at 16:46 +0100, Egon Andersen wrote: Jan-Marek Glogowski wrote: I checked my program with 2.5.5. And had a look at the ComboBox code: the toggle button is created when setting the style, so I think the box must be (at least) realized, maybe even shown. Thanks! I just made an extra callback function. The callback function just contains the gtk_container_forall() The callback function is connected by g_signal_connect_after() to the realize signal on the gtkcomboboxentry. Now that part is working Note that if this breaks, segfaults, whatever with a future version of GTK+, we won't care. Digging into the internal implementation guts of a widget in this fashion never supported. Sometimes you have to accept that certain things aren't possible with GTK+. At that point: - File a bug in bugzilla making a good case why notification on popup is a good thing - Design your user interface a different way for now. Regards, Owen signature.asc Description: This is a digitally signed message part ___ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Hi I added a patch for a popup event to my first reply. I wanted to file a bug report, but didn't really come up with a good case. There was a similar request a few days ago: Accessing GtkComboBoxEntry's toggle button. The patch is very simple - just two gtk_signal_emit, a return value to cancel popup and the signal definition ~20 lines of code. Jan-Marek ___ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
Re: Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Jan-Marek Glogowski wrote: Hi I added a patch for a popup event to my first reply. I wanted to file a bug report, but didn't really come up with a good case. There was a similar request a few days ago: Accessing GtkComboBoxEntry's toggle button. The patch is very simple - just two gtk_signal_emit, a return value to cancel popup and the signal definition ~20 lines of code. In my case it is a list of elements taken from a database. The list can be changed while the application is running. At the time I click on the combobox it is determined if the list in the db has changed and update the combobox list if required. Best regards Egon Andersen ___ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
Which signal is emitted when the arrow in GtkComboBoxEntry() is pressed?
Hi, During my migration from GtkCombo() I experienced that I miss a signal when the 'arrow' at the right of the GtkComboBoxEntry() is pressed. I can't seem to find the relevant signal. When GtkCombo() was used I used set-focus-child, but that doesn't do the trick any more. I've searched and experimented with a number of possible (and impossible) signals without luck. Best regards Egon Andersen (This is used to trigger the re-build I was mentioning in an earlier post today on this list.) ___ gtk-list mailing list [EMAIL PROTECTED] http://mail.gnome.org/mailman/listinfo/gtk-list
