summaryrefslogtreecommitdiff
path: root/gtk/gtkactionable.c
blob: 58c7d459cdb13f4fb0a1aa30f97df129e651de3b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
/*
 * Copyright © 2012 Canonical Limited
 *
 * 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
 * licence 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/>.
 *
 * Authors: Ryan Lortie <desrt@desrt.ca>
 */

#include "config.h"

#include "gtkactionable.h"

#include "gtkwidget.h"
#include "gtkintl.h"

/**
 * SECTION:gtkactionable
 * @title: GtkActionable
 * @short_description: An interface for widgets that can be associated
 *     with actions
 *
 * This interface provides a convenient way of associating widgets with
 * actions on a #GtkApplicationWindow or #GtkApplication.
 *
 * It primarily consists of two properties: #GtkActionable:action-name
 * and #GtkActionable:action-target. There are also some convenience APIs
 * for setting these properties.
 *
 * The action will be looked up in action groups that are found among
 * the widgets ancestors. Most commonly, these will be the actions with
 * the “win.” or “app.” prefix that are associated with the #GtkApplicationWindow
 * or #GtkApplication, but other action groups that are added with
 * gtk_widget_insert_action_group() will be consulted as well.
 **/

/**
 * GtkActionable:
 *
 * An opaque pointer type.
 **/

/**
 * GtkActionableInterface:
 * @get_action_name: virtual function for gtk_actionable_get_action_name()
 * @set_action_name: virtual function for gtk_actionable_set_action_name()
 * @get_action_target_value: virtual function for gtk_actionable_get_action_target_value()
 * @set_action_target_value: virtual function for gtk_actionable_set_action_target_value()
 *
 * The interface vtable for #GtkActionable.
 **/

G_DEFINE_INTERFACE (GtkActionable, gtk_actionable, GTK_TYPE_WIDGET)

static void
gtk_actionable_default_init (GtkActionableInterface *iface)
{
  g_object_interface_install_property (iface,
    g_param_spec_string ("action-name", P_("Action name"),
                         P_("The name of the associated action, like “app.quit”"),
                         NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_interface_install_property (iface,
    g_param_spec_variant ("action-target", P_("Action target value"),
                          P_("The parameter for action invocations"),
                          G_VARIANT_TYPE_ANY, NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}

/**
 * gtk_actionable_get_action_name:
 * @actionable: a #GtkActionable widget
 *
 * Gets the action name for @actionable.
 *
 * See gtk_actionable_set_action_name() for more information.
 *
 * Returns: (nullable): the action name, or %NULL if none is set
 **/
const gchar *
gtk_actionable_get_action_name (GtkActionable *actionable)
{
  g_return_val_if_fail (GTK_IS_ACTIONABLE (actionable), NULL);

  return GTK_ACTIONABLE_GET_IFACE (actionable)
    ->get_action_name (actionable);
}

/**
 * gtk_actionable_set_action_name:
 * @actionable: a #GtkActionable widget
 * @action_name: (nullable): an action name, or %NULL
 *
 * Specifies the name of the action with which this widget should be
 * associated.  If @action_name is %NULL then the widget will be
 * unassociated from any previous action.
 *
 * Usually this function is used when the widget is located (or will be
 * located) within the hierarchy of a #GtkApplicationWindow.
 *
 * Names are of the form “win.save” or “app.quit” for actions on the
 * containing #GtkApplicationWindow or its associated #GtkApplication,
 * respectively.  This is the same form used for actions in the #GMenu
 * associated with the window.
 **/
void
gtk_actionable_set_action_name (GtkActionable *actionable,
                                const gchar   *action_name)
{
  g_return_if_fail (GTK_IS_ACTIONABLE (actionable));

  GTK_ACTIONABLE_GET_IFACE (actionable)
    ->set_action_name (actionable, action_name);
}

/**
 * gtk_actionable_get_action_target_value:
 * @actionable: a #GtkActionable widget
 *
 * Gets the current target value of @actionable.
 *
 * See gtk_actionable_set_action_target_value() for more information.
 *
 * Returns: (transfer none): the current target value
 **/
GVariant *
gtk_actionable_get_action_target_value (GtkActionable *actionable)
{
  g_return_val_if_fail (GTK_IS_ACTIONABLE (actionable), NULL);

  return GTK_ACTIONABLE_GET_IFACE (actionable)
    ->get_action_target_value (actionable);
}

/**
 * gtk_actionable_set_action_target_value:
 * @actionable: a #GtkActionable widget
 * @target_value: (nullable): a #GVariant to set as the target value, or %NULL
 *
 * Sets the target value of an actionable widget.
 *
 * If @target_value is %NULL then the target value is unset.
 *
 * The target value has two purposes.  First, it is used as the
 * parameter to activation of the action associated with the
 * #GtkActionable widget. Second, it is used to determine if the widget
 * should be rendered as “active” — the widget is active if the state
 * is equal to the given target.
 *
 * Consider the example of associating a set of buttons with a #GAction
 * with string state in a typical “radio button” situation.  Each button
 * will be associated with the same action, but with a different target
 * value for that action.  Clicking on a particular button will activate
 * the action with the target of that button, which will typically cause
 * the action’s state to change to that value. Since the action’s state
 * is now equal to the target value of the button, the button will now
 * be rendered as active (and the other buttons, with different targets,
 * rendered inactive).
 **/
void
gtk_actionable_set_action_target_value (GtkActionable *actionable,
                                        GVariant      *target_value)
{
  g_return_if_fail (GTK_IS_ACTIONABLE (actionable));

  GTK_ACTIONABLE_GET_IFACE (actionable)
    ->set_action_target_value (actionable, target_value);
}

/**
 * gtk_actionable_set_action_target:
 * @actionable: a #GtkActionable widget
 * @format_string: a GVariant format string
 * @...: arguments appropriate for @format_string
 *
 * Sets the target of an actionable widget.
 *
 * This is a convenience function that calls g_variant_new() for
 * @format_string and uses the result to call
 * gtk_actionable_set_action_target_value().
 *
 * If you are setting a string-valued target and want to set the action
 * name at the same time, you can use
 * gtk_actionable_set_detailed_action_name ().
 **/
void
gtk_actionable_set_action_target (GtkActionable *actionable,
                                  const gchar   *format_string,
                                  ...)
{
  va_list ap;

  va_start (ap, format_string);
  gtk_actionable_set_action_target_value (actionable, g_variant_new_va (format_string, NULL, &ap));
  va_end (ap);
}

/**
 * gtk_actionable_set_detailed_action_name:
 * @actionable: a #GtkActionable widget
 * @detailed_action_name: the detailed action name
 *
 * Sets the action-name and associated string target value of an
 * actionable widget.
 *
 * @detailed_action_name is a string in the format accepted by
 * g_action_parse_detailed_name().
 *
 * (Note that prior to version 3.22.25,
 * this function is only usable for actions with a simple "s" target, and
 * @detailed_action_name must be of the form `"action::target"` where
 * `action` is the action name and `target` is the string to use
 * as the target.)
 **/
void
gtk_actionable_set_detailed_action_name (GtkActionable *actionable,
                                         const gchar   *detailed_action_name)
{
  GError *error = NULL;
  GVariant *target;
  gchar *name;

  if (detailed_action_name == NULL)
    {
      gtk_actionable_set_action_name (actionable, NULL);
      gtk_actionable_set_action_target_value (actionable, NULL);
      return;
    }

  if (!g_action_parse_detailed_name (detailed_action_name, &name, &target, &error))
    g_error ("gtk_actionable_set_detailed_action_name: %s", error->message);

  gtk_actionable_set_action_name (actionable, name);
  gtk_actionable_set_action_target_value (actionable, target);

  if (target)
    g_variant_unref (target);
  g_free (name);
}