gtk2/gtk/gtksearchentry.c
2017-01-31 09:39:39 +00:00

466 lines
15 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Red Hat, Inc.
*
* Authors:
* - Bastien Nocera <bnocera@redhat.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* Modified by the GTK+ Team and others 2012. 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/.
*/
#include "config.h"
#include "gtksearchentryprivate.h"
#include "gtkaccessible.h"
#include "gtkbindings.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtkstylecontext.h"
/**
* SECTION:gtksearchentry
* @Short_description: An entry which shows a search icon
* @Title: GtkSearchEntry
*
* #GtkSearchEntry is a subclass of #GtkEntry that has been
* tailored for use as a search entry.
*
* It will show an inactive symbolic “find” icon when the search
* entry is empty, and a symbolic “clear” icon when there is text.
* Clicking on the “clear” icon will empty the search entry.
*
* Note that the search/clear icon is shown using a secondary
* icon, and thus does not work if you are using the secondary
* icon position for some other purpose.
*
* To make filtering appear more reactive, it is a good idea to
* not react to every change in the entry text immediately, but
* only after a short delay. To support this, #GtkSearchEntry
* emits the #GtkSearchEntry::search-changed signal which can
* be used instead of the #GtkEditable::changed signal.
*
* The #GtkSearchEntry::previous-match, #GtkSearchEntry::next-match
* and #GtkSearchEntry::stop-search signals can be used to implement
* moving between search results and ending the search.
*
* Often, GtkSearchEntry will be fed events by means of being
* placed inside a #GtkSearchBar. If that is not the case,
* you can use gtk_search_entry_handle_event() to pass events.
*
* Since: 3.6
*/
enum {
SEARCH_CHANGED,
NEXT_MATCH,
PREVIOUS_MATCH,
STOP_SEARCH,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
typedef struct {
guint delayed_changed_id;
gboolean content_changed;
gboolean search_stopped;
} GtkSearchEntryPrivate;
static void gtk_search_entry_icon_release (GtkEntry *entry,
GtkEntryIconPosition icon_pos);
static void gtk_search_entry_changed (GtkEditable *editable);
static void gtk_search_entry_editable_init (GtkEditableInterface *iface);
static GtkEditableInterface *parent_editable_iface;
G_DEFINE_TYPE_WITH_CODE (GtkSearchEntry, gtk_search_entry, GTK_TYPE_ENTRY,
G_ADD_PRIVATE (GtkSearchEntry)
G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
gtk_search_entry_editable_init))
/* 150 mseconds of delay */
#define DELAYED_TIMEOUT_ID 150
/* This widget got created without a private structure, meaning
* that we cannot now have one without breaking ABI */
#define GET_PRIV(e) ((GtkSearchEntryPrivate *) gtk_search_entry_get_instance_private ((GtkSearchEntry *) (e)))
static void
gtk_search_entry_preedit_changed (GtkEntry *entry,
const gchar *preedit)
{
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
priv->content_changed = TRUE;
}
static void
gtk_search_entry_notify (GObject *object,
GParamSpec *pspec)
{
GtkSearchEntryPrivate *priv = GET_PRIV (object);
if (strcmp (pspec->name, "text") == 0)
priv->content_changed = TRUE;
if (G_OBJECT_CLASS (gtk_search_entry_parent_class)->notify)
G_OBJECT_CLASS (gtk_search_entry_parent_class)->notify (object, pspec);
}
static void
gtk_search_entry_finalize (GObject *object)
{
GtkSearchEntryPrivate *priv = GET_PRIV (object);
if (priv->delayed_changed_id > 0)
g_source_remove (priv->delayed_changed_id);
G_OBJECT_CLASS (gtk_search_entry_parent_class)->finalize (object);
}
static void
gtk_search_entry_stop_search (GtkSearchEntry *entry)
{
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
priv->search_stopped = TRUE;
}
static void
gtk_search_entry_class_init (GtkSearchEntryClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkBindingSet *binding_set;
object_class->finalize = gtk_search_entry_finalize;
object_class->notify = gtk_search_entry_notify;
klass->stop_search = gtk_search_entry_stop_search;
g_signal_override_class_handler ("icon-release",
GTK_TYPE_SEARCH_ENTRY,
G_CALLBACK (gtk_search_entry_icon_release));
g_signal_override_class_handler ("preedit-changed",
GTK_TYPE_SEARCH_ENTRY,
G_CALLBACK (gtk_search_entry_preedit_changed));
/**
* GtkSearchEntry::search-changed:
* @entry: the entry on which the signal was emitted
*
* The #GtkSearchEntry::search-changed signal is emitted with a short
* delay of 150 milliseconds after the last change to the entry text.
*
* Since: 3.10
*/
signals[SEARCH_CHANGED] =
g_signal_new (I_("search-changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkSearchEntryClass, search_changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkSearchEntry::next-match:
* @entry: the entry on which the signal was emitted
*
* The ::next-match signal is a [keybinding signal][GtkBindingSignal]
* which gets emitted when the user initiates a move to the next match
* for the current search string.
*
* Applications should connect to it, to implement moving between
* matches.
*
* The default bindings for this signal is Ctrl-g.
*
* Since: 3.16
*/
signals[NEXT_MATCH] =
g_signal_new (I_("next-match"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkSearchEntryClass, next_match),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkSearchEntry::previous-match:
* @entry: the entry on which the signal was emitted
*
* The ::previous-match signal is a [keybinding signal][GtkBindingSignal]
* which gets emitted when the user initiates a move to the previous match
* for the current search string.
*
* Applications should connect to it, to implement moving between
* matches.
*
* The default bindings for this signal is Ctrl-Shift-g.
*
* Since: 3.16
*/
signals[PREVIOUS_MATCH] =
g_signal_new (I_("previous-match"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkSearchEntryClass, previous_match),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkSearchEntry::stop-search:
* @entry: the entry on which the signal was emitted
*
* The ::stop-search signal is a [keybinding signal][GtkBindingSignal]
* which gets emitted when the user stops a search via keyboard input.
*
* Applications should connect to it, to implement hiding the search
* entry in this case.
*
* The default bindings for this signal is Escape.
*
* Since: 3.16
*/
signals[STOP_SEARCH] =
g_signal_new (I_("stop-search"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkSearchEntryClass, stop_search),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
binding_set = gtk_binding_set_by_class (klass);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_g, GDK_CONTROL_MASK,
"next-match", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_g, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
"previous-match", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0,
"stop-search", 0);
}
static void
gtk_search_entry_editable_init (GtkEditableInterface *iface)
{
parent_editable_iface = g_type_interface_peek_parent (iface);
iface->do_insert_text = parent_editable_iface->do_insert_text;
iface->do_delete_text = parent_editable_iface->do_delete_text;
iface->insert_text = parent_editable_iface->insert_text;
iface->delete_text = parent_editable_iface->delete_text;
iface->get_chars = parent_editable_iface->get_chars;
iface->set_selection_bounds = parent_editable_iface->set_selection_bounds;
iface->get_selection_bounds = parent_editable_iface->get_selection_bounds;
iface->set_position = parent_editable_iface->set_position;
iface->get_position = parent_editable_iface->get_position;
iface->changed = gtk_search_entry_changed;
}
static void
gtk_search_entry_icon_release (GtkEntry *entry,
GtkEntryIconPosition icon_pos)
{
if (icon_pos == GTK_ENTRY_ICON_SECONDARY)
gtk_entry_set_text (entry, "");
}
static gboolean
gtk_search_entry_changed_timeout_cb (gpointer user_data)
{
GtkSearchEntry *entry = user_data;
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
g_signal_emit (entry, signals[SEARCH_CHANGED], 0);
priv->delayed_changed_id = 0;
return G_SOURCE_REMOVE;
}
static void
reset_timeout (GtkSearchEntry *entry)
{
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
if (priv->delayed_changed_id > 0)
g_source_remove (priv->delayed_changed_id);
priv->delayed_changed_id = g_timeout_add (DELAYED_TIMEOUT_ID,
gtk_search_entry_changed_timeout_cb,
entry);
g_source_set_name_by_id (priv->delayed_changed_id, "[gtk+] gtk_search_entry_changed_timeout_cb");
}
static void
gtk_search_entry_changed (GtkEditable *editable)
{
GtkSearchEntry *entry = GTK_SEARCH_ENTRY (editable);
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
const char *str, *icon_name;
gboolean cleared;
/* Update the icons first */
str = gtk_entry_get_text (GTK_ENTRY (entry));
if (str == NULL || *str == '\0')
{
icon_name = NULL;
cleared = TRUE;
}
else
{
icon_name = "edit-clear-symbolic";
cleared = FALSE;
}
g_object_set (entry,
"secondary-icon-name", icon_name,
"secondary-icon-activatable", !cleared,
"secondary-icon-sensitive", !cleared,
NULL);
if (cleared)
{
if (priv->delayed_changed_id > 0)
{
g_source_remove (priv->delayed_changed_id);
priv->delayed_changed_id = 0;
}
g_signal_emit (entry, signals[SEARCH_CHANGED], 0);
}
else
{
/* Queue up the timeout */
reset_timeout (entry);
}
}
static void
gtk_search_entry_init (GtkSearchEntry *entry)
{
AtkObject *atk_obj;
g_object_set (entry,
"primary-icon-name", "edit-find-symbolic",
"primary-icon-activatable", FALSE,
"primary-icon-sensitive", FALSE,
NULL);
atk_obj = gtk_widget_get_accessible (GTK_WIDGET (entry));
if (GTK_IS_ACCESSIBLE (atk_obj))
atk_object_set_name (atk_obj, _("Search"));
gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (entry)), "search");
}
/**
* gtk_search_entry_new:
*
* Creates a #GtkSearchEntry, with a find icon when the search field is
* empty, and a clear icon when it isn't.
*
* Returns: a new #GtkSearchEntry
*
* Since: 3.6
*/
GtkWidget *
gtk_search_entry_new (void)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_SEARCH_ENTRY, NULL));
}
gboolean
gtk_search_entry_is_keynav_event (GdkEvent *event)
{
GdkModifierType state = 0;
guint keyval;
if (!gdk_event_get_keyval (event, &keyval))
return FALSE;
gdk_event_get_state (event, &state);
if (keyval == GDK_KEY_Tab || keyval == GDK_KEY_KP_Tab ||
keyval == GDK_KEY_Up || keyval == GDK_KEY_KP_Up ||
keyval == GDK_KEY_Down || keyval == GDK_KEY_KP_Down ||
keyval == GDK_KEY_Left || keyval == GDK_KEY_KP_Left ||
keyval == GDK_KEY_Right || keyval == GDK_KEY_KP_Right ||
keyval == GDK_KEY_Home || keyval == GDK_KEY_KP_Home ||
keyval == GDK_KEY_End || keyval == GDK_KEY_KP_End ||
keyval == GDK_KEY_Page_Up || keyval == GDK_KEY_KP_Page_Up ||
keyval == GDK_KEY_Page_Down || keyval == GDK_KEY_KP_Page_Down ||
((state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)) != 0))
return TRUE;
/* Other navigation events should get automatically
* ignored as they will not change the content of the entry
*/
return FALSE;
}
/**
* gtk_search_entry_handle_event:
* @entry: a #GtkSearchEntry
* @event: a key event
*
* This function should be called when the top-level window
* which contains the search entry received a key event. If
* the entry is part of a #GtkSearchBar, it is preferable
* to call gtk_search_bar_handle_event() instead, which will
* reveal the entry in addition to passing the event to this
* function.
*
* If the key event is handled by the search entry and starts
* or continues a search, %GDK_EVENT_STOP will be returned.
* The caller should ensure that the entry is shown in this
* case, and not propagate the event further.
*
* Returns: %GDK_EVENT_STOP if the key press event resulted
* in a search beginning or continuing, %GDK_EVENT_PROPAGATE
* otherwise.
*
* Since: 3.16
*/
gboolean
gtk_search_entry_handle_event (GtkSearchEntry *entry,
GdkEvent *event)
{
GtkSearchEntryPrivate *priv = GET_PRIV (entry);
gboolean handled;
if (!gtk_widget_get_realized (GTK_WIDGET (entry)))
gtk_widget_realize (GTK_WIDGET (entry));
if (gtk_search_entry_is_keynav_event (event) ||
event->key.keyval == GDK_KEY_space ||
event->key.keyval == GDK_KEY_Menu)
return GDK_EVENT_PROPAGATE;
priv->content_changed = FALSE;
priv->search_stopped = FALSE;
handled = gtk_widget_event (GTK_WIDGET (entry), event);
return handled && priv->content_changed && !priv->search_stopped ? GDK_EVENT_STOP : GDK_EVENT_PROPAGATE;
}