gtk2/gtk/gtksearchbar.c
2021-03-11 16:37:33 +00:00

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/* 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 "gtksearchbar.h"
#include "gtkbinlayout.h"
#include "gtkbuildable.h"
#include "gtkbutton.h"
#include "gtkcenterbox.h"
#include "gtkentryprivate.h"
#include "gtkeventcontrollerkey.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkrevealer.h"
#include "gtksearchentryprivate.h"
#include "gtksnapshot.h"
#include "gtkwidgetprivate.h"
/**
* GtkSearchBar:
*
* `GtkSearchBar` is a container made to have a search entry.
*
* ![An example GtkSearchBar](search-bar.png)
*
* It can also contain additional widgets, such as drop-down menus,
* or buttons. The search bar would appear when a search is started
* through typing on the keyboard, or the applications search mode
* is toggled on.
*
* For keyboard presses to start a search, the search bar must be told
* of a widget to capture key events from through
* [method@Gtk.SearchBar.set_key_capture_widget]. This widget will
* typically be the top-level window, or a parent container of the
* search bar. Common shortcuts such as Ctrl+F should be handled as an
* application action, or through the menu items.
*
* You will also need to tell the search bar about which entry you
* are using as your search entry using [method@Gtk.SearchBar.connect_entry].
*
* ## Creating a search bar
*
* The following example shows you how to create a more complex search
* entry.
*
* [A simple example](https://gitlab.gnome.org/GNOME/gtk/tree/master/examples/search-bar.c)
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* searchbar
* ╰── revealer
* ╰── box
* ├── [child]
* ╰── [button.close]
* ]|
*
* `GtkSearchBar` has a main CSS node with name searchbar. It has a child
* node with name revealer that contains a node with name box. The box node
* contains both the CSS node of the child widget as well as an optional button
* node which gets the .close style class applied.
*
* # Accessibility
*
* `GtkSearchBar` uses the %GTK_ACCESSIBLE_ROLE_SEARCH role.
*/
typedef struct _GtkSearchBarClass GtkSearchBarClass;
struct _GtkSearchBar
{
GtkWidget parent;
GtkWidget *child;
GtkWidget *revealer;
GtkWidget *box_center;
GtkWidget *close_button;
GtkWidget *entry;
gboolean reveal_child;
GtkWidget *capture_widget;
GtkEventController *capture_widget_controller;
};
struct _GtkSearchBarClass
{
GtkWidgetClass parent_class;
};
static void gtk_search_bar_buildable_iface_init (GtkBuildableIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkSearchBar, gtk_search_bar, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_search_bar_buildable_iface_init))
enum {
PROP_0,
PROP_SEARCH_MODE_ENABLED,
PROP_SHOW_CLOSE_BUTTON,
PROP_CHILD,
PROP_KEY_CAPTURE_WIDGET,
LAST_PROPERTY
};
static GParamSpec *widget_props[LAST_PROPERTY] = { NULL, };
static GtkBuildableIface *parent_buildable_iface;
static void
gtk_search_bar_buildable_add_child (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *type)
{
if (GTK_IS_WIDGET (child))
gtk_search_bar_set_child (GTK_SEARCH_BAR (buildable), GTK_WIDGET (child));
else
parent_buildable_iface->add_child (buildable, builder, child, type);
}
static void
gtk_search_bar_buildable_iface_init (GtkBuildableIface *iface)
{
parent_buildable_iface = g_type_interface_peek_parent (iface);
iface->add_child = gtk_search_bar_buildable_add_child;
}
static void
stop_search_cb (GtkWidget *entry,
GtkSearchBar *bar)
{
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->revealer), FALSE);
}
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->reveal_child)
return;
bar->reveal_child = reveal_child;
if (bar->entry)
{
if (reveal_child && GTK_IS_ENTRY (bar->entry))
gtk_entry_grab_focus_without_selecting (GTK_ENTRY (bar->entry));
else if (reveal_child && GTK_IS_SEARCH_ENTRY (bar->entry))
gtk_widget_grab_focus (bar->entry);
else
gtk_editable_set_text (GTK_EDITABLE (bar->entry), "");
}
g_object_notify_by_pspec (G_OBJECT (bar), widget_props[PROP_SEARCH_MODE_ENABLED]);
}
static void
close_button_clicked_cb (GtkWidget *button,
GtkSearchBar *bar)
{
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->revealer), FALSE);
}
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;
case PROP_CHILD:
gtk_search_bar_set_child (bar, g_value_get_object (value));
break;
case PROP_KEY_CAPTURE_WIDGET:
gtk_search_bar_set_key_capture_widget (bar, g_value_get_object (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, gtk_search_bar_get_search_mode (bar));
break;
case PROP_SHOW_CLOSE_BUTTON:
g_value_set_boolean (value, gtk_search_bar_get_show_close_button (bar));
break;
case PROP_CHILD:
g_value_set_object (value, gtk_search_bar_get_child (bar));
break;
case PROP_KEY_CAPTURE_WIDGET:
g_value_set_object (value, gtk_search_bar_get_key_capture_widget (bar));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void gtk_search_bar_set_entry (GtkSearchBar *bar,
GtkEditable *editable);
static void
gtk_search_bar_dispose (GObject *object)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (object);
gtk_search_bar_set_key_capture_widget (bar, NULL);
gtk_search_bar_set_entry (bar, NULL);
g_clear_pointer (&bar->revealer, gtk_widget_unparent);
bar->child = NULL;
bar->box_center = NULL;
bar->close_button = NULL;
G_OBJECT_CLASS (gtk_search_bar_parent_class)->dispose (object);
}
static void
gtk_search_bar_compute_expand (GtkWidget *widget,
gboolean *hexpand,
gboolean *vexpand)
{
GtkSearchBar *bar = GTK_SEARCH_BAR (widget);
if (bar->child)
{
*hexpand = gtk_widget_compute_expand (bar->child, GTK_ORIENTATION_HORIZONTAL);
*vexpand = gtk_widget_compute_expand (bar->child, GTK_ORIENTATION_VERTICAL);
}
else
{
*hexpand = FALSE;
*vexpand = FALSE;
}
}
static void
gtk_search_bar_class_init (GtkSearchBarClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_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;
widget_class->compute_expand = gtk_search_bar_compute_expand;
widget_class->focus = gtk_widget_focus_child;
/**
* GtkSearchBar:search-mode-enabled: (attributes org.gtk.Property.get=gtk_search_bar_get_search_mode org.gtk.Property.set=gtk_search_bar_set_search_mode)
*
* Whether the search mode is on and the search bar shown.
*/
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,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkSearchBar:show-close-button: (attributes org.gtk.Property.get=gtk_search_bar_get_show_close_button org.gtk.Property.set=gtk_search_bar_set_show_close_button)
*
* Whether to show the close button in the search bar.
*/
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"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkSearchBar:child: (attributes org.gtk.Property.get=gtk_search_bar_get_child org.gtk.Property.set=gtk_search_bar_set_child)
*
* The child widget.
*/
widget_props[PROP_CHILD] = g_param_spec_object ("child",
P_("Child"),
P_("The child widget"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkSearchBar:key-capture-widget: (attributes org.gtk.Property.get=gtk_search_bar_get_key_capture_widget org.gtk.Property.set=gtk_search_bar_set_key_capture_widget)
*
* The key capture widget.
*/
widget_props[PROP_KEY_CAPTURE_WIDGET]
= g_param_spec_object ("key-capture-widget",
P_("Key Capture Widget"),
P_("Key Capture Widget"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, LAST_PROPERTY, widget_props);
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
gtk_widget_class_set_css_name (widget_class, I_("searchbar"));
gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_SEARCH);
}
static void
gtk_search_bar_init (GtkSearchBar *bar)
{
bar->revealer = gtk_revealer_new ();
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->revealer), FALSE);
gtk_widget_set_hexpand (bar->revealer, TRUE);
gtk_widget_set_parent (bar->revealer, GTK_WIDGET (bar));
bar->box_center = gtk_center_box_new ();
gtk_widget_set_hexpand (bar->box_center, TRUE);
bar->close_button = gtk_button_new_from_icon_name ("window-close-symbolic");
gtk_widget_add_css_class (bar->close_button, "close");
gtk_center_box_set_end_widget (GTK_CENTER_BOX (bar->box_center), bar->close_button);
gtk_widget_hide (bar->close_button);
gtk_revealer_set_child (GTK_REVEALER (bar->revealer), bar->box_center);
g_signal_connect (bar->revealer, "notify::reveal-child",
G_CALLBACK (reveal_child_changed_cb), bar);
g_signal_connect (bar->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 [method@Gtk.SearchBar.connect_entry].
*
* Returns: a new `GtkSearchBar`
*/
GtkWidget *
gtk_search_bar_new (void)
{
return g_object_new (GTK_TYPE_SEARCH_BAR, NULL);
}
static void
gtk_search_bar_set_entry (GtkSearchBar *bar,
GtkEditable *entry)
{
if (bar->entry != NULL)
{
if (GTK_IS_SEARCH_ENTRY (bar->entry))
{
gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (bar->entry), NULL);
g_signal_handlers_disconnect_by_func (bar->entry, stop_search_cb, bar);
}
g_object_remove_weak_pointer (G_OBJECT (bar->entry), (gpointer *) &bar->entry);
}
bar->entry = GTK_WIDGET (entry);
if (bar->entry != NULL)
{
g_object_add_weak_pointer (G_OBJECT (bar->entry), (gpointer *) &bar->entry);
if (GTK_IS_SEARCH_ENTRY (bar->entry))
{
g_signal_connect (bar->entry, "stop-search",
G_CALLBACK (stop_search_cb), bar);
gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (bar->entry),
GTK_WIDGET (bar));
}
}
}
/**
* gtk_search_bar_connect_entry:
* @bar: a `GtkSearchBar`
* @entry: a `GtkEditable`
*
* Connects the `GtkEditable widget passed as the one to be used in
* this search bar.
*
* The entry should be a descendant of the search bar. Calling this
* function manually is only required if the entry isnt the direct
* child of the search bar (as in our main example).
*/
void
gtk_search_bar_connect_entry (GtkSearchBar *bar,
GtkEditable *entry)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
g_return_if_fail (entry == NULL || GTK_IS_EDITABLE (entry));
gtk_search_bar_set_entry (bar, entry);
}
/**
* gtk_search_bar_get_search_mode: (attributes org.gtk.Method.get_property=search-mode-enabled)
* @bar: a `GtkSearchBar`
*
* Returns whether the search mode is on or off.
*
* Returns: whether search mode is toggled on
*/
gboolean
gtk_search_bar_get_search_mode (GtkSearchBar *bar)
{
g_return_val_if_fail (GTK_IS_SEARCH_BAR (bar), FALSE);
return bar->reveal_child;
}
/**
* gtk_search_bar_set_search_mode: (attributes org.gtk.Method.set_property=search-mode-enabled)
* @bar: a `GtkSearchBar`
* @search_mode: the new state of the search mode
*
* Switches the search mode on or off.
*/
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->revealer), search_mode);
}
/**
* gtk_search_bar_get_show_close_button: (attributes org.gtk.Method.get_property=show-close-button)
* @bar: a `GtkSearchBar`
*
* Returns whether the close button is shown.
*
* Returns: whether the close button is shown
*/
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->close_button);
}
/**
* gtk_search_bar_set_show_close_button: (attributes org.gtk.Method.set_property=show-close-button)
* @bar: a `GtkSearchBar`
* @visible: whether the close button will be shown or not
*
* Shows or hides the close button.
*
* Applications that already have a “search” toggle button should not
* show a close button in their search bar, as it duplicates the role
* of the toggle button.
*/
void
gtk_search_bar_set_show_close_button (GtkSearchBar *bar,
gboolean visible)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
visible = visible != FALSE;
if (gtk_widget_get_visible (bar->close_button) != visible)
{
gtk_widget_set_visible (bar->close_button, visible);
g_object_notify_by_pspec (G_OBJECT (bar), widget_props[PROP_SHOW_CLOSE_BUTTON]);
}
}
static void
changed_cb (gboolean *changed)
{
*changed = TRUE;
}
static gboolean
capture_widget_key_handled (GtkEventControllerKey *controller,
guint keyval,
guint keycode,
GdkModifierType state,
GtkSearchBar *bar)
{
gboolean handled;
if (!gtk_widget_get_mapped (GTK_WIDGET (bar)))
return GDK_EVENT_PROPAGATE;
if (bar->reveal_child)
return GDK_EVENT_PROPAGATE;
if (bar->entry == NULL)
{
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;
}
if (GTK_IS_SEARCH_ENTRY (bar->entry))
{
/* The search entry was told to listen to events from the search bar, so
* just forward the event to self, so the search entry has an opportunity
* to intercept those.
*/
handled = gtk_event_controller_key_forward (controller, GTK_WIDGET (bar));
}
else
{
gboolean preedit_changed, buffer_changed;
guint preedit_change_id, buffer_change_id;
gboolean res;
if (gtk_search_entry_is_keynav (keyval, state) ||
keyval == GDK_KEY_space ||
keyval == GDK_KEY_Menu)
return GDK_EVENT_PROPAGATE;
if (keyval == GDK_KEY_Escape)
{
if (gtk_revealer_get_reveal_child (GTK_REVEALER (bar->revealer)))
{
stop_search_cb (bar->entry, bar);
return GDK_EVENT_STOP;
}
return GDK_EVENT_PROPAGATE;
}
handled = GDK_EVENT_PROPAGATE;
preedit_changed = buffer_changed = FALSE;
preedit_change_id = g_signal_connect_swapped (bar->entry, "preedit-changed",
G_CALLBACK (changed_cb), &preedit_changed);
buffer_change_id = g_signal_connect_swapped (bar->entry, "changed",
G_CALLBACK (changed_cb), &buffer_changed);
res = gtk_event_controller_key_forward (controller, bar->entry);
g_signal_handler_disconnect (bar->entry, preedit_change_id);
g_signal_handler_disconnect (bar->entry, buffer_change_id);
if ((res && buffer_changed) || preedit_changed)
handled = GDK_EVENT_STOP;
}
if (handled == GDK_EVENT_STOP)
gtk_revealer_set_reveal_child (GTK_REVEALER (bar->revealer), TRUE);
return handled;
}
/**
* gtk_search_bar_set_key_capture_widget: (attributes org.gtk.Method.set_property=key-capture-widget)
* @bar: a `GtkSearchBar`
* @widget: (nullable) (transfer none): a `GtkWidget`
*
* Sets @widget as the widget that @bar will capture key events
* from.
*
* If key events are handled by the search bar, the bar will
* be shown, and the entry populated with the entered text.
*
* Note that despite the name of this function, the events
* are only 'captured' in the bubble phase, which means that
* editable child widgets of @widget will receive text input
* before it gets captured. If that is not desired, you can
* capture and forward the events yourself with
* [method@Gtk.EventControllerKey.forward].
*/
void
gtk_search_bar_set_key_capture_widget (GtkSearchBar *bar,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_SEARCH_BAR (bar));
g_return_if_fail (!widget || GTK_IS_WIDGET (widget));
if (bar->capture_widget == widget)
return;
if (bar->capture_widget)
{
gtk_widget_remove_controller (bar->capture_widget,
bar->capture_widget_controller);
g_object_remove_weak_pointer (G_OBJECT (bar->capture_widget),
(gpointer *) &bar->capture_widget);
}
bar->capture_widget = widget;
if (widget)
{
g_object_add_weak_pointer (G_OBJECT (bar->capture_widget),
(gpointer *) &bar->capture_widget);
bar->capture_widget_controller = gtk_event_controller_key_new ();
gtk_event_controller_set_propagation_phase (bar->capture_widget_controller,
GTK_PHASE_BUBBLE);
g_signal_connect (bar->capture_widget_controller, "key-pressed",
G_CALLBACK (capture_widget_key_handled), bar);
g_signal_connect (bar->capture_widget_controller, "key-released",
G_CALLBACK (capture_widget_key_handled), bar);
gtk_widget_add_controller (widget, bar->capture_widget_controller);
}
g_object_notify_by_pspec (G_OBJECT (bar), widget_props[PROP_KEY_CAPTURE_WIDGET]);
}
/**
* gtk_search_bar_get_key_capture_widget: (attributes org.gtk.Method.get_property=key-capture-widget)
* @bar: a `GtkSearchBar`
*
* Gets the widget that @bar is capturing key events from.
*
* Returns: (transfer none): The key capture widget.
**/
GtkWidget *
gtk_search_bar_get_key_capture_widget (GtkSearchBar *bar)
{
g_return_val_if_fail (GTK_IS_SEARCH_BAR (bar), NULL);
return bar->capture_widget;
}
/**
* gtk_search_bar_set_child: (attributes org.gtk.Method.set_property=child)
* @bar: a `GtkSearchBar`
* @child: (allow-none): the child widget
*
* Sets the child widget of @bar.
*/
void
gtk_search_bar_set_child (GtkSearchBar *bar,
GtkWidget *child)
{
if (bar->child)
{
if (GTK_IS_EDITABLE (bar->child))
gtk_search_bar_connect_entry (bar, NULL);
gtk_center_box_set_center_widget (GTK_CENTER_BOX (bar->box_center), NULL);
}
bar->child = child;
if (bar->child)
{
gtk_center_box_set_center_widget (GTK_CENTER_BOX (bar->box_center), child);
if (GTK_IS_EDITABLE (child))
gtk_search_bar_connect_entry (bar, GTK_EDITABLE (child));
}
g_object_notify_by_pspec (G_OBJECT (bar), widget_props[PROP_CHILD]);
}
/**
* gtk_search_bar_get_child: (attributes org.gtk.Method.get_property=child)
* @bar: a `GtkSearchBar`
*
* Gets the child widget of @bar.
*
* Returns: (nullable) (transfer none): the child widget of @bar
*/
GtkWidget *
gtk_search_bar_get_child (GtkSearchBar *bar)
{
return bar->child;
}