gtk2/gtk/gtksearchbar.c
Bastien Nocera dbbea8b97e Add GtkSearchBar widget
This widget is a toolbar that will popup automatically when
searches should be started, and dismissed when they are finished.

https://bugzilla.gnome.org/show_bug.cgi?id=700787
2013-05-31 17:09:11 +02:00

553 lines
17 KiB
C

/* GTK - The GIMP Toolkit
* Copyright (C) 2013 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 2013. 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 "gtkentry.h"
#include "gtkentryprivate.h"
#include "gtkintl.h"
#include "gtktoolbar.h"
#include "gtktoolitem.h"
#include "gtkstylecontext.h"
#include "gtksearchbar.h"
/**
* SECTION:gtksearchbar
* @Short_description: An toolbar to integrate a search entry with
* @Title: GtkSearchBar
*
* #GtkSearchBar is a container made to have a search entry (possibly
* with additional connex widgets, such as drop-down menus, or buttons) built-in.
* The search bar would appear when a search is started through typing on the
* keyboard, or the application's search mode is toggled on.
*
* For keyboard presses to start a search, events will need to be forwarded
* from the top-level window that contains the search bar. See
* gtk_search_bar_handle_event() for example code.
*
* You will also need to tell the search bar about which entry you are
* using as your search entry using gtk_search_bar_connect_entry().
* The following example shows you how to create a more complex
* search entry.
*
* <example>
* <title>Creating a search bar</title>
* <programlisting><![CDATA[
* bar = gtk_search_bar_new ();
*
* /<!---->* Create a box for the search entry and related widgets *<---->/
* entry = gtk_search_entry_new ();
* box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
* gtk_box_pack_start (GTK_BOX (box), entry, TRUE, TRUE, 0);
* /<!---->* Add a menu button to select the category of the search *<---->/
* menu_button = gtk_menu_button_new ();
* gtk_box_pack_start (GTK_BOX (box), menu_button, FALSE, FALSE, 0);
* gtk_container_add (GTK_CONTAINER (searchbar), box);
*
* /<!---->* And tell the search bar about the search entry *<---->/
* gtk_search_bar_set_search_entry (GTK_SEARCH_BAR (bar), entry);
* ]]></programlisting>
* </example>
*
* Since: 3.10
*/
G_DEFINE_TYPE (GtkSearchBar, gtk_search_bar, GTK_TYPE_BIN)
struct _GtkSearchBarPrivate {
/* Template widgets */
GtkWidget *revealer;
GtkWidget *toolbar;
GtkWidget *box_center;
GtkWidget *close_button;
GtkWidget *entry;
gboolean reveal_child;
};
enum {
PROP_0,
PROP_SEARCH_MODE_ENABLED,
PROP_SHOW_CLOSE_BUTTON,
LAST_PROPERTY
};
static GParamSpec *widget_props[LAST_PROPERTY] = { NULL, };
static gboolean
is_keynav_event (GdkEvent *event,
guint keyval)
{
GdkModifierType state = 0;
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;
}
static gboolean
entry_key_pressed_event_cb (GtkWidget *widget,
GdkEvent *event,
GtkSearchBar *bar)
{
guint keyval;
if (!gdk_event_get_keyval (event, &keyval) ||
keyval != GDK_KEY_Escape)
return GDK_EVENT_PROPAGATE;
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->priv->revealer), FALSE);
return GDK_EVENT_STOP;
}
static void
preedit_changed_cb (GtkEntry *entry,
GtkWidget *popup,
gboolean *preedit_changed)
{
*preedit_changed = TRUE;
}
/**
* gtk_search_bar_handle_event:
* @bar: a #GtkSearchBar
* @event: a #GdkEvent containing key press events
*
* This function should be called when the top-level
* window which contains the search bar received a key event.
*
* If the key event is handled by the search bar, the bar will
* be shown, the entry populated with the entered text and %GDK_EVENT_STOP
* will be returned. The caller should ensure that events are
* not propagated further.
*
* If no entry has been connected to the search bar, using
* gtk_search_bar_connect_entry(), this function will return immediately with
* a warning.
*
* <example>
* <title>Showing the search bar on key presses</title>
* <programlisting><![CDATA[
* static gboolean
* window_key_press_event_cb (GtkWidget *widget,
* GdkEvent *event,
* gpointer user_data)
* {
* return gtk_search_bar_handle_event (GTK_SEARCH_BAR (user_data), event);
* }
*
* g_signal_connect (window, "key-press-event",
* G_CALLBACK (window_key_press_event_cb), search_bar);
* ]]></programlisting>
* </example>
*
* Return value: %GDK_EVENT_STOP if the key press event resulted in text
* being * entered in the search entry (and revealing the search bar if
* necessary), %GDK_EVENT_PROPAGATE otherwise.
*
* Since: 3.10
**/
gboolean
gtk_search_bar_handle_event (GtkSearchBar *bar,
GdkEvent *event)
{
guint keyval;
gboolean handled;
gboolean preedit_changed;
guint preedit_change_id;
gboolean res;
char *old_text, *new_text;
if (!bar->priv->entry)
{
g_warning ("The search bar does not have an entry connected to it. Call gtk_search_bar_connect_entry() to connect one.");
return GDK_EVENT_PROPAGATE;
}
/* Exit early if the search bar is already shown,
* the event doesn't contain a key press,
* or the event is a navigation or space bar key press
*/
if (bar->priv->reveal_child ||
!gdk_event_get_keyval (event, &keyval) ||
is_keynav_event (event, keyval) ||
keyval == GDK_KEY_space)
return GDK_EVENT_PROPAGATE;
if (!gtk_widget_get_realized (bar->priv->entry))
gtk_widget_realize (bar->priv->entry);
handled = GDK_EVENT_PROPAGATE;
preedit_changed = FALSE;
preedit_change_id = g_signal_connect (bar->priv->entry, "preedit-changed",
G_CALLBACK (preedit_changed_cb), &preedit_changed);
old_text = g_strdup (gtk_entry_get_text (GTK_ENTRY (bar->priv->entry)));
res = gtk_widget_event (bar->priv->entry, event);
new_text = g_strdup (gtk_entry_get_text (GTK_ENTRY (bar->priv->entry)));
g_signal_handler_disconnect (bar->priv->entry, preedit_change_id);
if ((res && g_strcmp0 (new_text, old_text) != 0) || preedit_changed)
{
handled = GDK_EVENT_STOP;
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->priv->revealer), TRUE);
}
g_free (old_text);
g_free (new_text);
return handled;
}
static void
reveal_child_changed_cb (GObject *object,
GParamSpec *pspec,
GtkSearchBar *bar)
{
gboolean reveal_child;
g_object_get (object, "reveal-child", &reveal_child, NULL);
if (reveal_child == bar->priv->reveal_child)
return;
bar->priv->reveal_child = reveal_child;
if (reveal_child)
_gtk_entry_grab_focus (GTK_ENTRY (bar->priv->entry), FALSE);
else
gtk_entry_set_text (GTK_ENTRY (bar->priv->entry), "");
g_object_notify (G_OBJECT (bar), "search-mode-enabled");
}
static void
close_button_clicked_cb (GtkWidget *button,
GtkSearchBar *bar)
{
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->priv->revealer), FALSE);
}
static void
gtk_search_bar_add (GtkContainer *container,
GtkWidget *child)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (container);
/* When constructing the widget, we want the revealer to be added
* as the first child of the search bar, as an implementation detail.
* After that, the child added by the application should be added
* to the toolbar's box_center.
*/
if (bar->priv->box_center == NULL)
{
GTK_CONTAINER_CLASS (gtk_search_bar_parent_class)->add (container, child);
/* If an entry is the only child, save the developer a couple of
* lines of code */
if (GTK_IS_ENTRY (child))
gtk_search_bar_connect_entry (bar, GTK_ENTRY (child));
}
else
{
gtk_container_add (GTK_CONTAINER (bar->priv->box_center), child);
}
}
static void
gtk_search_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (object);
switch (prop_id)
{
case PROP_SEARCH_MODE_ENABLED:
gtk_search_bar_set_search_mode (bar, g_value_get_boolean (value));
break;
case PROP_SHOW_CLOSE_BUTTON:
gtk_search_bar_set_show_close_button (bar, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_search_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (object);
switch (prop_id)
{
case PROP_SEARCH_MODE_ENABLED:
g_value_set_boolean (value, bar->priv->reveal_child);
break;
case PROP_SHOW_CLOSE_BUTTON:
g_value_set_boolean (value, gtk_search_bar_get_show_close_button (bar));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_search_bar_dispose (GObject *object)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (object);
if (bar->priv->entry)
{
g_signal_handlers_disconnect_by_func (bar->priv->entry, entry_key_pressed_event_cb, bar);
g_object_remove_weak_pointer (G_OBJECT (bar->priv->entry), (gpointer *) &bar->priv->entry);
bar->priv->entry = NULL;
}
G_OBJECT_CLASS (gtk_search_bar_parent_class)->dispose (object);
}
static void
gtk_search_bar_class_init (GtkSearchBarClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
object_class->dispose = gtk_search_bar_dispose;
object_class->set_property = gtk_search_bar_set_property;
object_class->get_property = gtk_search_bar_get_property;
container_class->add = gtk_search_bar_add;
/**
* GtkEntry:search-mode-enabled:
*
* Whether the search mode is on and the search bar shown.
*
* See gtk_search_bar_set_search_mode() for details.
*
**/
widget_props[PROP_SEARCH_MODE_ENABLED] = g_param_spec_boolean ("search-mode-enabled",
P_("Search Mode Enabled"),
P_("Whether the search mode is on and the search bar shown"),
FALSE,
G_PARAM_READWRITE);
/**
* GtkEntry:show-close-button:
*
* Whether to show the close button in the toolbar.
*
**/
widget_props[PROP_SHOW_CLOSE_BUTTON] = g_param_spec_boolean ("show-close-button",
P_("Show Close Button"),
P_("Whether to show the close button in the toolbar"),
TRUE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
g_object_class_install_properties (object_class, LAST_PROPERTY, widget_props);
gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/gtksearchbar.ui");
gtk_widget_class_bind_child_internal (widget_class, GtkSearchBarPrivate, toolbar);
gtk_widget_class_bind_child_internal (widget_class, GtkSearchBarPrivate, revealer);
gtk_widget_class_bind_child_internal (widget_class, GtkSearchBarPrivate, box_center);
gtk_widget_class_bind_child_internal (widget_class, GtkSearchBarPrivate, close_button);
g_type_class_add_private (klass, sizeof (GtkSearchBarPrivate));
}
static void
gtk_search_bar_init (GtkSearchBar *bar)
{
bar->priv = G_TYPE_INSTANCE_GET_PRIVATE (bar, GTK_TYPE_SEARCH_BAR, GtkSearchBarPrivate);
gtk_widget_init_template (GTK_WIDGET (bar));
gtk_widget_show_all (bar->priv->toolbar);
g_signal_connect (bar->priv->revealer, "notify::reveal-child",
G_CALLBACK (reveal_child_changed_cb), bar);
gtk_widget_set_no_show_all (bar->priv->close_button, TRUE);
g_signal_connect (bar->priv->close_button, "clicked",
G_CALLBACK (close_button_clicked_cb), bar);
};
/**
* gtk_search_bar_new:
*
* Creates a #GtkSearchBar. You will need to tell it about
* which widget is going to be your text entry using
* gtk_search_bar_set_entry().
*
* Return value: a new #GtkSearchBar
*
* Since: 3.10
*/
GtkWidget *
gtk_search_bar_new (void)
{
return g_object_new (GTK_TYPE_SEARCH_BAR, NULL);
}
/**
* gtk_search_bar_connect_entry:
* @bar: a #GtkSearchBar
* @entry: a #GtkEntry
*
* Connects the #GtkEntry widget passed as the one to be used in
* this search bar. The entry should be a descendant of the search bar.
* This is only required if the entry isn't the direct child of the
* search bar (as in our main example).
*
* Since: 3.10
**/
void
gtk_search_bar_connect_entry (GtkSearchBar *bar,
GtkEntry *entry)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
g_return_if_fail (entry == NULL || GTK_IS_ENTRY (entry));
if (bar->priv->entry != NULL)
{
g_signal_handlers_disconnect_by_func (bar->priv->entry, entry_key_pressed_event_cb, bar);
g_object_remove_weak_pointer (G_OBJECT (bar->priv->entry), (gpointer *) &bar->priv->entry);
bar->priv->entry = NULL;
}
if (entry != NULL)
{
bar->priv->entry = GTK_WIDGET (entry);
g_object_add_weak_pointer (G_OBJECT (bar->priv->entry), (gpointer *) &bar->priv->entry);
g_signal_connect (bar->priv->entry, "key-press-event",
G_CALLBACK (entry_key_pressed_event_cb), bar);
}
}
/**
* gtk_search_bar_get_search_mode:
* @bar: a #GtkSearchBar
*
* Returns whether the search mode is on or off.
*
* Return value: whether search mode is toggled on
*
* Since: 3.10
**/
gboolean
gtk_search_bar_get_search_mode (GtkSearchBar *bar)
{
g_return_val_if_fail (GTK_IS_SEARCH_BAR (bar), FALSE);
return bar->priv->reveal_child;
}
/**
* gtk_search_bar_set_search_mode:
* @bar: a #GtkSearchBar
* @search_mode: the new state of the search mode
*
* Switches the search mode on or off.
*
* Since: 3.10
**/
void
gtk_search_bar_set_search_mode (GtkSearchBar *bar,
gboolean search_mode)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->priv->revealer), search_mode);
}
/**
* gtk_search_bar_get_show_close_button:
* @bar: a #GtkSearchBar
*
* Returns whether the close button is shown.
*
* Return value: whether the close button is shown
*
* Since: 3.10
**/
gboolean
gtk_search_bar_get_show_close_button (GtkSearchBar *bar)
{
g_return_val_if_fail (GTK_IS_SEARCH_BAR (bar), FALSE);
return gtk_widget_get_visible (bar->priv->close_button);
}
/**
* gtk_search_bar_set_show_close_button:
* @bar: a #GtkSearchBar
* @shown: whether the close button will be shown or not.
*
* Shows or hides the close button.
*
* Since: 3.10
**/
void
gtk_search_bar_set_show_close_button (GtkSearchBar *bar,
gboolean visible)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
gtk_widget_set_visible (bar->priv->close_button, visible);
}