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gtk2/gtk/gtkcombo.c
Owen Taylor b295f552ee Add back the monitoring of the selection when the combo isn't popped down; 
Wed Dec  4 12:44:50 2002  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkcombo.c (gtk_combo_selection_changed): Add
        back the monitoring of the selection when the combo
        isn't popped down; apparently people depended upon
        the side-effect where gtk_combo_set_popdown_strings()
        would wipe out the contents of the list when browse-mode
        autoselected the first item in the list. (#100347)
2002-12-04 18:07:08 +00:00

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/* gtkcombo - combo widget for gtk+
* Copyright 1997 Paolo Molaro
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
/* Do NOT, I repeat, NOT, copy any of the code in this file.
* The code here relies on all sorts of internal details of GTK+
*/
#undef GTK_DISABLE_DEPRECATED
#include <string.h>
#include "gtkarrow.h"
#include "gtklabel.h"
#include "gtklist.h"
#include "gtkentry.h"
#include "gtkeventbox.h"
#include "gtkbutton.h"
#include "gtklistitem.h"
#include "gtkscrolledwindow.h"
#include "gtkmain.h"
#include "gtkwindow.h"
#include "gdk/gdkkeysyms.h"
#include "gtkcombo.h"
#include "gtkframe.h"
#include "gtkintl.h"
const gchar *gtk_combo_string_key = "gtk-combo-string-value";
#define COMBO_LIST_MAX_HEIGHT (400)
#define EMPTY_LIST_HEIGHT (15)
enum {
PROP_0,
PROP_ENABLE_ARROW_KEYS,
PROP_ENABLE_ARROWS_ALWAYS,
PROP_CASE_SENSITIVE,
PROP_ALLOW_EMPTY,
PROP_VALUE_IN_LIST
};
static void gtk_combo_class_init (GtkComboClass *klass);
static void gtk_combo_init (GtkCombo *combo);
static void gtk_combo_realize (GtkWidget *widget);
static void gtk_combo_unrealize (GtkWidget *widget);
static void gtk_combo_destroy (GtkObject *combo);
static GtkListItem *gtk_combo_find (GtkCombo *combo);
static gchar * gtk_combo_func (GtkListItem *li);
static gint gtk_combo_focus_idle (GtkCombo *combo);
static gint gtk_combo_entry_focus_out (GtkEntry *entry,
GdkEventFocus *event,
GtkCombo *combo);
static void gtk_combo_get_pos (GtkCombo *combo,
gint *x,
gint *y,
gint *height,
gint *width);
static void gtk_combo_popup_list (GtkCombo *combo);
static void gtk_combo_popdown_list (GtkCombo *combo);
static void gtk_combo_activate (GtkWidget *widget,
GtkCombo *combo);
static gboolean gtk_combo_popup_button_press (GtkWidget *button,
GdkEventButton *event,
GtkCombo *combo);
static gboolean gtk_combo_popup_button_leave (GtkWidget *button,
GdkEventCrossing *event,
GtkCombo *combo);
static void gtk_combo_update_entry (GtkCombo *combo);
static void gtk_combo_update_list (GtkEntry *entry,
GtkCombo *combo);
static gint gtk_combo_button_press (GtkWidget *widget,
GdkEvent *event,
GtkCombo *combo);
static void gtk_combo_button_event_after (GtkWidget *widget,
GdkEvent *event,
GtkCombo *combo);
static gint gtk_combo_list_enter (GtkWidget *widget,
GdkEventCrossing *event,
GtkCombo *combo);
static gint gtk_combo_list_key_press (GtkWidget *widget,
GdkEventKey *event,
GtkCombo *combo);
static gint gtk_combo_entry_key_press (GtkEntry *widget,
GdkEventKey *event,
GtkCombo *combo);
static gint gtk_combo_window_key_press (GtkWidget *window,
GdkEventKey *event,
GtkCombo *combo);
static void gtk_combo_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_combo_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_combo_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GtkHBoxClass *parent_class = NULL;
static void
gtk_combo_class_init (GtkComboClass * klass)
{
GObjectClass *gobject_class;
GtkObjectClass *oclass;
GtkWidgetClass *widget_class;
gobject_class = (GObjectClass *) klass;
oclass = (GtkObjectClass *) klass;
widget_class = (GtkWidgetClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gtk_combo_set_property;
gobject_class->get_property = gtk_combo_get_property;
g_object_class_install_property (gobject_class,
PROP_ENABLE_ARROW_KEYS,
g_param_spec_boolean ("enable_arrow_keys",
_("Enable arrow keys"),
_("Whether the arrow keys move through the list of items"),
TRUE,
G_PARAM_READABLE | G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class,
PROP_ENABLE_ARROWS_ALWAYS,
g_param_spec_boolean ("enable_arrows_always",
_("Always enable arrows"),
_("Obsolete property, ignored"),
TRUE,
G_PARAM_READABLE | G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class,
PROP_CASE_SENSITIVE,
g_param_spec_boolean ("case_sensitive",
_("Case sensitive"),
_("Whether list item matching is case sensitive"),
FALSE,
G_PARAM_READABLE | G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class,
PROP_ALLOW_EMPTY,
g_param_spec_boolean ("allow_empty",
_("Allow empty"),
_("Whether an empty value may be entered in this field"),
TRUE,
G_PARAM_READABLE | G_PARAM_WRITABLE));
g_object_class_install_property (gobject_class,
PROP_VALUE_IN_LIST,
g_param_spec_boolean ("value_in_list",
_("Value in list"),
_("Whether entered values must already be present in the list"),
FALSE,
G_PARAM_READABLE | G_PARAM_WRITABLE));
oclass->destroy = gtk_combo_destroy;
widget_class->size_allocate = gtk_combo_size_allocate;
widget_class->realize = gtk_combo_realize;
widget_class->unrealize = gtk_combo_unrealize;
}
static void
gtk_combo_destroy (GtkObject *object)
{
GtkCombo *combo = GTK_COMBO (object);
if (combo->popwin)
{
gtk_widget_destroy (combo->popwin);
g_object_unref (combo->popwin);
combo->popwin = NULL;
}
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static int
gtk_combo_entry_key_press (GtkEntry * entry, GdkEventKey * event, GtkCombo * combo)
{
GList *li;
guint state = event->state & gtk_accelerator_get_default_mod_mask ();
/* completion */
if ((event->keyval == GDK_Tab || event->keyval == GDK_KP_Tab) &&
state == GDK_MOD1_MASK)
{
GtkEditable *editable = GTK_EDITABLE (entry);
GCompletion * cmpl;
gchar* prefix;
gchar* nprefix = NULL;
gint pos;
if ( !GTK_LIST (combo->list)->children )
return FALSE;
cmpl = g_completion_new ((GCompletionFunc)gtk_combo_func);
g_completion_add_items (cmpl, GTK_LIST (combo->list)->children);
pos = gtk_editable_get_position (editable);
prefix = gtk_editable_get_chars (editable, 0, pos);
g_completion_complete (cmpl, prefix, &nprefix);
if (nprefix && strlen (nprefix) > strlen (prefix))
{
gtk_editable_insert_text (editable, nprefix + pos,
strlen (nprefix) - strlen (prefix), &pos);
gtk_editable_set_position (editable, pos);
}
if (nprefix)
g_free (nprefix);
g_free (prefix);
g_completion_free (cmpl);
return TRUE;
}
if ((event->keyval == GDK_Down || event->keyval == GDK_KP_Down) &&
state == GDK_MOD1_MASK)
{
gtk_combo_activate (NULL, combo);
return TRUE;
}
if (!combo->use_arrows || !GTK_LIST (combo->list)->children)
return FALSE;
gtk_combo_update_list (GTK_ENTRY (combo->entry), combo);
li = g_list_find (GTK_LIST (combo->list)->children, gtk_combo_find (combo));
if (((event->keyval == GDK_Up || event->keyval == GDK_KP_Up) && state == 0) ||
((event->keyval == 'p' || event->keyval == 'P') && state == GDK_MOD1_MASK))
{
if (!li)
li = g_list_last (GTK_LIST (combo->list)->children);
else
li = li->prev;
if (li)
{
gtk_list_select_child (GTK_LIST (combo->list), GTK_WIDGET (li->data));
gtk_combo_update_entry (combo);
}
return TRUE;
}
if (((event->keyval == GDK_Down || event->keyval == GDK_KP_Down) && state == 0) ||
((event->keyval == 'n' || event->keyval == 'N') && state == GDK_MOD1_MASK))
{
if (!li)
li = GTK_LIST (combo->list)->children;
else if (li)
li = li->next;
if (li)
{
gtk_list_select_child (GTK_LIST (combo->list), GTK_WIDGET (li->data));
gtk_combo_update_entry (combo);
}
return TRUE;
}
return FALSE;
}
static int
gtk_combo_window_key_press (GtkWidget *window,
GdkEventKey *event,
GtkCombo *combo)
{
guint state = event->state & gtk_accelerator_get_default_mod_mask ();
if ((event->keyval == GDK_Return || event->keyval == GDK_KP_Enter) &&
state == 0)
{
gtk_combo_popdown_list (combo);
gtk_combo_update_entry (combo);
return TRUE;
}
else if ((event->keyval == GDK_Up || event->keyval == GDK_KP_Up) &&
state == GDK_MOD1_MASK)
{
gtk_combo_popdown_list (combo);
return TRUE;
}
else if ((event->keyval == GDK_space || event->keyval == GDK_KP_Space) &&
state == 0)
{
gtk_combo_update_entry (combo);
}
return FALSE;
}
static GtkListItem *
gtk_combo_find (GtkCombo * combo)
{
const gchar *text;
GtkListItem *found = NULL;
gchar *ltext;
gchar *compare_text;
GList *clist;
text = gtk_entry_get_text (GTK_ENTRY (combo->entry));
if (combo->case_sensitive)
compare_text = (gchar *)text;
else
compare_text = g_utf8_casefold (text, -1);
for (clist = GTK_LIST (combo->list)->children;
!found && clist;
clist = clist->next)
{
ltext = gtk_combo_func (GTK_LIST_ITEM (clist->data));
if (!ltext)
continue;
if (!combo->case_sensitive)
ltext = g_utf8_casefold (ltext, -1);
if (strcmp (ltext, compare_text) == 0)
found = clist->data;
if (!combo->case_sensitive)
g_free (ltext);
}
if (!combo->case_sensitive)
g_free (compare_text);
return found;
}
static gchar *
gtk_combo_func (GtkListItem * li)
{
GtkWidget *label;
gchar *ltext = NULL;
ltext = g_object_get_data (G_OBJECT (li), gtk_combo_string_key);
if (!ltext)
{
label = GTK_BIN (li)->child;
if (!label || !GTK_IS_LABEL (label))
return NULL;
ltext = (gchar *) gtk_label_get_text (GTK_LABEL (label));
}
return ltext;
}
static gint
gtk_combo_focus_idle (GtkCombo * combo)
{
if (combo)
{
GDK_THREADS_ENTER ();
gtk_widget_grab_focus (combo->entry);
GDK_THREADS_LEAVE ();
}
return FALSE;
}
static gint
gtk_combo_entry_focus_out (GtkEntry * entry, GdkEventFocus * event, GtkCombo * combo)
{
if (combo->value_in_list && !gtk_combo_find (combo))
{
GSource *focus_idle;
/* gdk_beep(); *//* this can be annoying */
if (combo->ok_if_empty && !strcmp (gtk_entry_get_text (entry), ""))
return FALSE;
#ifdef TEST
printf ("INVALID ENTRY: `%s'\n", gtk_entry_get_text (entry));
#endif
gtk_grab_add (GTK_WIDGET (combo));
/* this is needed because if we call gtk_widget_grab_focus()
it isn't guaranteed it's the *last* call before the main-loop,
so the focus can be lost anyway...
the signal_stop_emission doesn't seem to work either...
*/
focus_idle = g_idle_source_new ();
g_source_set_closure (focus_idle,
g_cclosure_new_object (G_CALLBACK (gtk_combo_focus_idle),
G_OBJECT (combo)));
g_source_attach (focus_idle, NULL);
/*g_signal_stop_emission_by_name (entry, "focus_out_event"); */
return TRUE;
}
return FALSE;
}
static void
gtk_combo_get_pos (GtkCombo * combo, gint * x, gint * y, gint * height, gint * width)
{
GtkBin *popwin;
GtkWidget *widget;
GtkScrolledWindow *popup;
gint real_height;
GtkRequisition list_requisition;
gboolean show_hscroll = FALSE;
gboolean show_vscroll = FALSE;
gint avail_height;
gint min_height;
gint alloc_width;
gint work_height;
gint old_height;
gint old_width;
gint scrollbar_spacing;
widget = GTK_WIDGET (combo);
popup = GTK_SCROLLED_WINDOW (combo->popup);
popwin = GTK_BIN (combo->popwin);
scrollbar_spacing = _gtk_scrolled_window_get_scrollbar_spacing (popup);
gdk_window_get_origin (combo->entry->window, x, y);
real_height = MIN (combo->entry->requisition.height,
combo->entry->allocation.height);
*y += real_height;
avail_height = gdk_screen_get_height (gtk_widget_get_screen (widget)) - *y;
gtk_widget_size_request (combo->list, &list_requisition);
min_height = MIN (list_requisition.height,
popup->vscrollbar->requisition.height);
if (!GTK_LIST (combo->list)->children)
list_requisition.height += EMPTY_LIST_HEIGHT;
alloc_width = (widget->allocation.width -
2 * popwin->child->style->xthickness -
2 * GTK_CONTAINER (popwin->child)->border_width -
2 * GTK_CONTAINER (combo->popup)->border_width -
2 * GTK_CONTAINER (GTK_BIN (popup)->child)->border_width -
2 * GTK_BIN (popup)->child->style->xthickness);
work_height = (2 * popwin->child->style->ythickness +
2 * GTK_CONTAINER (popwin->child)->border_width +
2 * GTK_CONTAINER (combo->popup)->border_width +
2 * GTK_CONTAINER (GTK_BIN (popup)->child)->border_width +
2 * GTK_BIN (popup)->child->style->ythickness);
do
{
old_width = alloc_width;
old_height = work_height;
if (!show_hscroll &&
alloc_width < list_requisition.width)
{
GtkRequisition requisition;
gtk_widget_size_request (popup->hscrollbar, &requisition);
work_height += (requisition.height + scrollbar_spacing);
show_hscroll = TRUE;
}
if (!show_vscroll &&
work_height + list_requisition.height > avail_height)
{
GtkRequisition requisition;
if (work_height + min_height > avail_height &&
*y - real_height > avail_height)
{
*y -= (work_height + list_requisition.height + real_height);
break;
}
gtk_widget_size_request (popup->hscrollbar, &requisition);
alloc_width -= (requisition.width + scrollbar_spacing);
show_vscroll = TRUE;
}
} while (old_width != alloc_width || old_height != work_height);
*width = widget->allocation.width;
if (show_vscroll)
*height = avail_height;
else
*height = work_height + list_requisition.height;
if (*x < 0)
*x = 0;
}
static void
gtk_combo_popup_list (GtkCombo * combo)
{
GtkList *list;
gint height, width, x, y;
gint old_width, old_height;
old_width = combo->popwin->allocation.width;
old_height = combo->popwin->allocation.height;
gtk_combo_get_pos (combo, &x, &y, &height, &width);
/* workaround for gtk_scrolled_window_size_allocate bug */
if (old_width != width || old_height != height)
{
gtk_widget_hide (GTK_SCROLLED_WINDOW (combo->popup)->hscrollbar);
gtk_widget_hide (GTK_SCROLLED_WINDOW (combo->popup)->vscrollbar);
}
gtk_combo_update_list (GTK_ENTRY (combo->entry), combo);
/* We need to make sure some child of combo->popwin
* is focused to disable GtkWindow's automatic
* "focus-the-first-item" code. If there is no selected
* child, we focus the list itself with some hackery.
*/
list = GTK_LIST (combo->list);
if (list->selection)
{
gtk_widget_grab_focus (list->selection->data);
}
else
{
GTK_WIDGET_SET_FLAGS (list, GTK_CAN_FOCUS);
gtk_widget_grab_focus (combo->list);
GTK_LIST (combo->list)->last_focus_child = NULL;
GTK_WIDGET_UNSET_FLAGS (list, GTK_CAN_FOCUS);
}
gtk_window_move (GTK_WINDOW (combo->popwin), x, y);
gtk_widget_set_size_request (combo->popwin, width, height);
gtk_widget_show (combo->popwin);
gtk_widget_grab_focus (combo->popwin);
}
static void
gtk_combo_popdown_list (GtkCombo *combo)
{
combo->current_button = 0;
if (GTK_BUTTON (combo->button)->in_button)
{
GTK_BUTTON (combo->button)->in_button = FALSE;
gtk_button_released (GTK_BUTTON (combo->button));
}
if (GTK_WIDGET_HAS_GRAB (combo->popwin))
{
gtk_grab_remove (combo->popwin);
gdk_display_pointer_ungrab (gtk_widget_get_display (GTK_WIDGET (combo)),
gtk_get_current_event_time ());
gdk_display_keyboard_ungrab (gtk_widget_get_display (GTK_WIDGET (combo)),
gtk_get_current_event_time ());
}
gtk_widget_hide (combo->popwin);
}
static gboolean
popup_grab_on_window (GdkWindow *window,
guint32 activate_time)
{
if ((gdk_pointer_grab (window, TRUE,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK,
NULL, NULL, activate_time) == 0))
{
if (gdk_keyboard_grab (window, TRUE,
activate_time) == 0)
return TRUE;
else
{
gdk_display_pointer_ungrab (gdk_drawable_get_display (window),
activate_time);
return FALSE;
}
}
return FALSE;
}
static void
gtk_combo_activate (GtkWidget *widget,
GtkCombo *combo)
{
if (!combo->button->window ||
!popup_grab_on_window (combo->button->window,
gtk_get_current_event_time ()))
return;
gtk_combo_popup_list (combo);
/* This must succeed since we already have the grab */
popup_grab_on_window (combo->popwin->window,
gtk_get_current_event_time ());
if (!GTK_WIDGET_HAS_FOCUS (combo->entry))
gtk_widget_grab_focus (combo->entry);
gtk_grab_add (combo->popwin);
}
static gboolean
gtk_combo_popup_button_press (GtkWidget *button,
GdkEventButton *event,
GtkCombo *combo)
{
if (!GTK_WIDGET_HAS_FOCUS (combo->entry))
gtk_widget_grab_focus (combo->entry);
if (event->button != 1)
return FALSE;
if (!popup_grab_on_window (combo->button->window,
gtk_get_current_event_time ()))
return FALSE;
combo->current_button = event->button;
gtk_combo_popup_list (combo);
/* This must succeed since we already have the grab */
popup_grab_on_window (combo->popwin->window,
gtk_get_current_event_time ());
gtk_button_pressed (GTK_BUTTON (button));
gtk_grab_add (combo->popwin);
return TRUE;
}
static gboolean
gtk_combo_popup_button_leave (GtkWidget *button,
GdkEventCrossing *event,
GtkCombo *combo)
{
/* The idea here is that we want to keep the button down if the
* popup is popped up.
*/
return combo->current_button != 0;
}
static void
gtk_combo_update_entry (GtkCombo * combo)
{
GtkList *list = GTK_LIST (combo->list);
char *text;
g_signal_handler_block (list, combo->list_change_id);
if (list->selection)
{
text = gtk_combo_func (GTK_LIST_ITEM (list->selection->data));
if (!text)
text = "";
gtk_entry_set_text (GTK_ENTRY (combo->entry), text);
}
g_signal_handler_unblock (list, combo->list_change_id);
}
static void
gtk_combo_selection_changed (GtkList *list,
GtkCombo *combo)
{
if (!GTK_WIDGET_VISIBLE (combo->popwin))
gtk_combo_update_entry (combo);
}
static void
gtk_combo_update_list (GtkEntry * entry, GtkCombo * combo)
{
GtkList *list = GTK_LIST (combo->list);
GList *slist = list->selection;
GtkListItem *li;
gtk_grab_remove (GTK_WIDGET (combo));
g_signal_handler_block (entry, combo->entry_change_id);
if (slist && slist->data)
gtk_list_unselect_child (list, GTK_WIDGET (slist->data));
li = gtk_combo_find (combo);
if (li)
gtk_list_select_child (list, GTK_WIDGET (li));
g_signal_handler_unblock (entry, combo->entry_change_id);
}
static gint
gtk_combo_button_press (GtkWidget * widget, GdkEvent * event, GtkCombo * combo)
{
GtkWidget *child;
child = gtk_get_event_widget (event);
/* We don't ask for button press events on the grab widget, so
* if an event is reported directly to the grab widget, it must
* be on a window outside the application (and thus we remove
* the popup window). Otherwise, we check if the widget is a child
* of the grab widget, and only remove the popup window if it
* is not.
*/
if (child != widget)
{
while (child)
{
if (child == widget)
return FALSE;
child = child->parent;
}
}
gtk_combo_popdown_list (combo);
return TRUE;
}
static gboolean
is_within (GtkWidget *widget,
GtkWidget *ancestor)
{
return widget == ancestor || gtk_widget_is_ancestor (widget, ancestor);
}
static void
gtk_combo_button_event_after (GtkWidget *widget,
GdkEvent *event,
GtkCombo *combo)
{
GtkWidget *child;
if (event->type != GDK_BUTTON_RELEASE)
return;
child = gtk_get_event_widget ((GdkEvent*) event);
if ((combo->current_button != 0) && (event->button.button == 1))
{
/* This was the initial button press */
combo->current_button = 0;
/* Check to see if we released inside the button */
if (child && is_within (child, combo->button))
{
gtk_grab_add (combo->popwin);
gdk_pointer_grab (combo->popwin->window, TRUE,
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK,
NULL, NULL, GDK_CURRENT_TIME);
return;
}
}
if (is_within (child, combo->list))
gtk_combo_update_entry (combo);
gtk_combo_popdown_list (combo);
}
static void
find_child_foreach (GtkWidget *widget,
gpointer data)
{
GdkEventButton *event = data;
if (!event->window)
{
if (event->x >= widget->allocation.x &&
event->x < widget->allocation.x + widget->allocation.width &&
event->y >= widget->allocation.y &&
event->y < widget->allocation.y + widget->allocation.height)
event->window = g_object_ref (widget->window);
}
}
static void
find_child_window (GtkContainer *container,
GdkEventButton *event)
{
gtk_container_foreach (container, find_child_foreach, event);
}
static gint
gtk_combo_list_enter (GtkWidget *widget,
GdkEventCrossing *event,
GtkCombo *combo)
{
GtkWidget *event_widget;
event_widget = gtk_get_event_widget ((GdkEvent*) event);
if ((event_widget == combo->list) &&
(combo->current_button != 0) &&
(!GTK_WIDGET_HAS_GRAB (combo->list)))
{
GdkEvent *tmp_event = gdk_event_new (GDK_BUTTON_PRESS);
gint x, y;
GdkModifierType mask;
gtk_grab_remove (combo->popwin);
/* Transfer the grab over to the list by synthesizing
* a button press event
*/
gdk_window_get_pointer (combo->list->window, &x, &y, &mask);
tmp_event->button.send_event = TRUE;
tmp_event->button.time = GDK_CURRENT_TIME; /* bad */
tmp_event->button.x = x;
tmp_event->button.y = y;
/* We leave all the XInput fields unfilled here, in the expectation
* that GtkList doesn't care.
*/
tmp_event->button.button = combo->current_button;
tmp_event->button.state = mask;
find_child_window (GTK_CONTAINER (combo->list), &tmp_event->button);
if (!tmp_event->button.window)
{
GtkWidget *child;
if (GTK_LIST (combo->list)->children)
child = GTK_LIST (combo->list)->children->data;
else
child = combo->list;
tmp_event->button.window = g_object_ref (child->window);
}
gtk_widget_event (combo->list, tmp_event);
gdk_event_free (tmp_event);
}
return FALSE;
}
static int
gtk_combo_list_key_press (GtkWidget * widget, GdkEventKey * event, GtkCombo * combo)
{
guint state = event->state & gtk_accelerator_get_default_mod_mask ();
if (event->keyval == GDK_Escape && state == 0)
{
if (GTK_WIDGET_HAS_GRAB (combo->list))
gtk_list_end_drag_selection (GTK_LIST (combo->list));
gtk_combo_popdown_list (combo);
return TRUE;
}
return FALSE;
}
static void
combo_event_box_realize (GtkWidget *widget)
{
GdkCursor *cursor = gdk_cursor_new_for_display (gtk_widget_get_display (widget),
GDK_TOP_LEFT_ARROW);
gdk_window_set_cursor (widget->window, cursor);
gdk_cursor_unref (cursor);
}
static void
gtk_combo_init (GtkCombo * combo)
{
GtkWidget *arrow;
GtkWidget *frame;
GtkWidget *event_box;
combo->case_sensitive = FALSE;
combo->value_in_list = FALSE;
combo->ok_if_empty = TRUE;
combo->use_arrows = TRUE;
combo->use_arrows_always = FALSE;
combo->entry = gtk_entry_new ();
combo->button = gtk_button_new ();
combo->current_button = 0;
arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
gtk_widget_show (arrow);
gtk_container_add (GTK_CONTAINER (combo->button), arrow);
gtk_box_pack_start (GTK_BOX (combo), combo->entry, TRUE, TRUE, 0);
gtk_box_pack_end (GTK_BOX (combo), combo->button, FALSE, FALSE, 0);
GTK_WIDGET_UNSET_FLAGS (combo->button, GTK_CAN_FOCUS);
gtk_widget_show (combo->entry);
gtk_widget_show (combo->button);
combo->entry_change_id = g_signal_connect (combo->entry, "changed",
G_CALLBACK (gtk_combo_update_list),
combo);
g_signal_connect (combo->entry, "key_press_event",
G_CALLBACK (gtk_combo_entry_key_press), combo);
g_signal_connect_after (combo->entry, "focus_out_event",
G_CALLBACK (gtk_combo_entry_focus_out), combo);
combo->activate_id = g_signal_connect (combo->entry, "activate",
G_CALLBACK (gtk_combo_activate),
combo);
g_signal_connect (combo->button, "button_press_event",
G_CALLBACK (gtk_combo_popup_button_press), combo);
g_signal_connect (combo->button, "leave_notify_event",
G_CALLBACK (gtk_combo_popup_button_leave), combo);
combo->popwin = gtk_window_new (GTK_WINDOW_POPUP);
g_object_ref (combo->popwin);
gtk_window_set_resizable (GTK_WINDOW (combo->popwin), FALSE);
g_signal_connect (combo->popwin, "key_press_event",
G_CALLBACK (gtk_combo_window_key_press), combo);
gtk_widget_set_events (combo->popwin, GDK_KEY_PRESS_MASK);
event_box = gtk_event_box_new ();
gtk_container_add (GTK_CONTAINER (combo->popwin), event_box);
g_signal_connect (event_box, "realize",
G_CALLBACK (combo_event_box_realize), NULL);
gtk_widget_show (event_box);
frame = gtk_frame_new (NULL);
gtk_container_add (GTK_CONTAINER (event_box), frame);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_widget_show (frame);
combo->popup = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (combo->popup),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
GTK_WIDGET_UNSET_FLAGS (GTK_SCROLLED_WINDOW (combo->popup)->hscrollbar, GTK_CAN_FOCUS);
GTK_WIDGET_UNSET_FLAGS (GTK_SCROLLED_WINDOW (combo->popup)->vscrollbar, GTK_CAN_FOCUS);
gtk_container_add (GTK_CONTAINER (frame), combo->popup);
gtk_widget_show (combo->popup);
combo->list = gtk_list_new ();
/* We'll use enter notify events to figure out when to transfer
* the grab to the list
*/
gtk_widget_set_events (combo->list, GDK_ENTER_NOTIFY_MASK);
gtk_list_set_selection_mode (GTK_LIST(combo->list), GTK_SELECTION_BROWSE);
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (combo->popup), combo->list);
gtk_container_set_focus_vadjustment (GTK_CONTAINER (combo->list),
gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (combo->popup)));
gtk_container_set_focus_hadjustment (GTK_CONTAINER (combo->list),
gtk_scrolled_window_get_hadjustment (GTK_SCROLLED_WINDOW (combo->popup)));
gtk_widget_show (combo->list);
combo->list_change_id = g_signal_connect (combo->list, "selection_changed",
G_CALLBACK (gtk_combo_selection_changed), combo);
g_signal_connect (combo->popwin, "key_press_event",
G_CALLBACK (gtk_combo_list_key_press), combo);
g_signal_connect (combo->popwin, "button_press_event",
G_CALLBACK (gtk_combo_button_press), combo);
g_signal_connect (combo->popwin, "event_after",
G_CALLBACK (gtk_combo_button_event_after), combo);
g_signal_connect (combo->list, "event_after",
G_CALLBACK (gtk_combo_button_event_after), combo);
g_signal_connect (combo->list, "enter_notify_event",
G_CALLBACK (gtk_combo_list_enter), combo);
}
static void
gtk_combo_realize (GtkWidget *widget)
{
GtkCombo *combo = GTK_COMBO (widget);
gtk_window_set_screen (GTK_WINDOW (combo->popwin),
gtk_widget_get_screen (widget));
GTK_WIDGET_CLASS( parent_class )->realize (widget);
}
static void
gtk_combo_unrealize (GtkWidget *widget)
{
GtkCombo *combo = GTK_COMBO (widget);
gtk_combo_popdown_list (combo);
gtk_widget_unrealize (combo->popwin);
GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
}
GType
gtk_combo_get_type (void)
{
static GType combo_type = 0;
if (!combo_type)
{
static const GTypeInfo combo_info =
{
sizeof (GtkComboClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_combo_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkCombo),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_combo_init,
};
combo_type = g_type_register_static (GTK_TYPE_HBOX, "GtkCombo",
&combo_info, 0);
}
return combo_type;
}
GtkWidget*
gtk_combo_new (void)
{
return g_object_new (GTK_TYPE_COMBO, NULL);
}
void
gtk_combo_set_value_in_list (GtkCombo * combo, gboolean val, gboolean ok_if_empty)
{
g_return_if_fail (GTK_IS_COMBO (combo));
val = val != FALSE;
ok_if_empty = ok_if_empty != FALSE;
g_object_freeze_notify (G_OBJECT (combo));
if (combo->value_in_list != val)
{
combo->value_in_list = val;
g_object_notify (G_OBJECT (combo), "value_in_list");
}
if (combo->ok_if_empty != ok_if_empty)
{
combo->ok_if_empty = ok_if_empty;
g_object_notify (G_OBJECT (combo), "allow_empty");
}
g_object_thaw_notify (G_OBJECT (combo));
}
void
gtk_combo_set_case_sensitive (GtkCombo * combo, gboolean val)
{
g_return_if_fail (GTK_IS_COMBO (combo));
val = val != FALSE;
if (combo->case_sensitive != val)
{
combo->case_sensitive = val;
g_object_notify (G_OBJECT (combo), "case_sensitive");
}
}
void
gtk_combo_set_use_arrows (GtkCombo * combo, gboolean val)
{
g_return_if_fail (GTK_IS_COMBO (combo));
val = val != FALSE;
if (combo->use_arrows != val)
{
combo->use_arrows = val;
g_object_notify (G_OBJECT (combo), "enable_arrow_keys");
}
}
void
gtk_combo_set_use_arrows_always (GtkCombo * combo, gboolean val)
{
g_return_if_fail (GTK_IS_COMBO (combo));
val = val != FALSE;
if (combo->use_arrows_always != val)
{
g_object_freeze_notify (G_OBJECT (combo));
combo->use_arrows_always = val;
g_object_notify (G_OBJECT (combo), "enable_arrows_always");
if (combo->use_arrows != TRUE)
{
combo->use_arrows = TRUE;
g_object_notify (G_OBJECT (combo), "enable_arrow_keys");
}
g_object_thaw_notify (G_OBJECT (combo));
}
}
void
gtk_combo_set_popdown_strings (GtkCombo * combo, GList * strings)
{
GList *list;
GtkWidget *li;
g_return_if_fail (GTK_IS_COMBO (combo));
g_return_if_fail (strings != NULL);
gtk_combo_popdown_list (combo);
gtk_list_clear_items (GTK_LIST (combo->list), 0, -1);
list = strings;
while (list)
{
li = gtk_list_item_new_with_label ((gchar *) list->data);
gtk_widget_show (li);
gtk_container_add (GTK_CONTAINER (combo->list), li);
list = list->next;
}
}
void
gtk_combo_set_item_string (GtkCombo * combo, GtkItem * item, const gchar * item_value)
{
g_return_if_fail (GTK_IS_COMBO (combo));
g_return_if_fail (item != NULL);
g_object_set_data_full (G_OBJECT (item), gtk_combo_string_key,
g_strdup (item_value), g_free);
}
static void
gtk_combo_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkCombo *combo;
g_return_if_fail (GTK_IS_COMBO (widget));
g_return_if_fail (allocation != NULL);
GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
combo = GTK_COMBO (widget);
if (combo->entry->allocation.height > combo->entry->requisition.height)
{
GtkAllocation button_allocation;
button_allocation = combo->button->allocation;
button_allocation.height = combo->entry->requisition.height;
button_allocation.y = combo->entry->allocation.y +
(combo->entry->allocation.height - combo->entry->requisition.height)
/ 2;
gtk_widget_size_allocate (combo->button, &button_allocation);
}
}
void
gtk_combo_disable_activate (GtkCombo* combo)
{
g_return_if_fail (GTK_IS_COMBO (combo));
if ( combo->activate_id ) {
g_signal_handler_disconnect (combo->entry, combo->activate_id);
combo->activate_id = 0;
}
}
static void
gtk_combo_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCombo *combo = GTK_COMBO (object);
switch (prop_id)
{
case PROP_ENABLE_ARROW_KEYS:
gtk_combo_set_use_arrows (combo, g_value_get_boolean (value));
break;
case PROP_ENABLE_ARROWS_ALWAYS:
gtk_combo_set_use_arrows_always (combo, g_value_get_boolean (value));
break;
case PROP_CASE_SENSITIVE:
gtk_combo_set_case_sensitive (combo, g_value_get_boolean (value));
break;
case PROP_ALLOW_EMPTY:
combo->ok_if_empty = g_value_get_boolean (value);
break;
case PROP_VALUE_IN_LIST:
combo->value_in_list = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_combo_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkCombo *combo = GTK_COMBO (object);
switch (prop_id)
{
case PROP_ENABLE_ARROW_KEYS:
g_value_set_boolean (value, combo->use_arrows);
break;
case PROP_ENABLE_ARROWS_ALWAYS:
g_value_set_boolean (value, combo->use_arrows_always);
break;
case PROP_CASE_SENSITIVE:
g_value_set_boolean (value, combo->case_sensitive);
break;
case PROP_ALLOW_EMPTY:
g_value_set_boolean (value, combo->ok_if_empty);
break;
case PROP_VALUE_IN_LIST:
g_value_set_boolean (value, combo->value_in_list);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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