git.sur5r.net Git - glabels/blob - src/field-button.c

   1 /*
   2  *  field-button.c
   3  *  Copyright (C) 2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "field-button.h"
  24
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27
  28 #include "field-button-menu.h"
  29 #include "marshal.h"
  30
  31
  32
  33 /*========================================================*/
  34 /* Private types.                                         */
  35 /*========================================================*/
  36
  37 /** GL_FIELD_BUTTON Private fields */
  38 struct _glFieldButtonPrivate {
  39
  40         GtkWidget  *label;
  41
  42         GtkWidget  *menu;
  43 };
  44
  45 enum {
  46         KEY_SELECTED,
  47         LAST_SIGNAL
  48 };
  49
  50
  51 /*========================================================*/
  52 /* Private globals.                                       */
  53 /*========================================================*/
  54
  55 static guint signals[LAST_SIGNAL] = {0};
  56
  57
  58 /*========================================================*/
  59 /* Private function prototypes.                           */
  60 /*========================================================*/
  61
  62 static void gl_field_button_finalize      (GObject             *object);
  63
  64 static gboolean
  65 button_press_event_cb (GtkWidget          *widget,
  66                        GdkEventButton     *event,
  67                        glFieldButton      *this);
  68
  69 static void
  70 menu_key_selected_cb  (glFieldButtonMenu  *menu,
  71                        gchar              *key,
  72                        glFieldButton      *this);
  73
  74 static void
  75 menu_selection_done_cb (GtkMenuShell      *object,
  76                         glFieldButton     *this);
  77
  78
  79 /*****************************************************************************/
  80 /* Object infrastructure.                                                    */
  81 /*****************************************************************************/
  82 G_DEFINE_TYPE (glFieldButton, gl_field_button, GTK_TYPE_TOGGLE_BUTTON);
  83
  84
  85 /*****************************************************************************/
  86 /* Class Init Function.                                                      */
  87 /*****************************************************************************/
  88 static void
  89 gl_field_button_class_init (glFieldButtonClass *class)
  90 {
  91         GObjectClass      *gobject_class = (GObjectClass *) class;
  92
  93         gl_field_button_parent_class = g_type_class_peek_parent (class);
  94
  95         gobject_class->finalize = gl_field_button_finalize;
  96
  97         signals[KEY_SELECTED] =
  98                 g_signal_new ("key_selected",
  99                               G_OBJECT_CLASS_TYPE (gobject_class),
 100                               G_SIGNAL_RUN_LAST,
 101                               G_STRUCT_OFFSET (glFieldButtonClass, key_selected),
 102                               NULL, NULL,
 103                               gl_marshal_VOID__STRING,
 104                               G_TYPE_NONE, 1, G_TYPE_STRING);
 105 }
 106
 107
 108 /*****************************************************************************/
 109 /* Object Instance Init Function.                                            */
 110 /*****************************************************************************/
 111 static void
 112 gl_field_button_init (glFieldButton *this)
 113 {
 114         GtkWidget *hbox;
 115         GtkWidget *arrow;
 116
 117         this->priv = g_new0 (glFieldButtonPrivate, 1);
 118
 119         hbox = gtk_hbox_new (FALSE, 3);
 120         gtk_container_add (GTK_CONTAINER (this), hbox);
 121
 122         this->priv->label = gtk_label_new ("");
 123         gtk_misc_set_alignment (GTK_MISC (this->priv->label), 0.0, 0.5);
 124         gtk_box_pack_start (GTK_BOX (hbox), this->priv->label, TRUE, TRUE, 0);
 125
 126         arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_IN);
 127         gtk_box_pack_end (GTK_BOX (hbox), arrow, FALSE, FALSE, 0);
 128
 129         g_signal_connect (this, "button_press_event",
 130                           G_CALLBACK(button_press_event_cb), this);
 131 }
 132
 133
 134 /*****************************************************************************/
 135 /* Finalize Method.                                                          */
 136 /*****************************************************************************/
 137 static void
 138 gl_field_button_finalize (GObject *object)
 139 {
 140         glFieldButton    *this;
 141
 142         g_return_if_fail (object && IS_GL_FIELD_BUTTON (object));
 143         this = GL_FIELD_BUTTON (object);
 144
 145         g_object_ref_sink (this->priv->menu);
 146         g_free (this->priv);
 147
 148         G_OBJECT_CLASS (gl_field_button_parent_class)->finalize (object);
 149 }
 150
 151
 152 /*****************************************************************************/
 153 /** New Object Generator.                                                    */
 154 /*****************************************************************************/
 155 GtkWidget *
 156 gl_field_button_new (const gchar  *name)
 157 {
 158         glFieldButton  *this;
 159
 160         this = g_object_new (TYPE_GL_FIELD_BUTTON, NULL);
 161
 162         gtk_label_set_text (GTK_LABEL (this->priv->label), name);
 163
 164         this->priv->menu = gl_field_button_menu_new ();
 165
 166         gtk_widget_show_all (this->priv->menu);
 167
 168         g_signal_connect (this->priv->menu, "key_selected",
 169                           G_CALLBACK (menu_key_selected_cb), this);
 170         g_signal_connect (this->priv->menu, "selection_done",
 171                           G_CALLBACK (menu_selection_done_cb), this);
 172
 173         return GTK_WIDGET (this);
 174 }
 175
 176
 177 /*****************************************************************************/
 178 /* Set key list.                                                             */
 179 /*****************************************************************************/
 180 void
 181 gl_field_button_set_keys (glFieldButton  *this,
 182                           GList          *key_list)
 183 {
 184         gl_field_button_menu_set_keys (GL_FIELD_BUTTON_MENU (this->priv->menu),
 185                                        key_list);
 186
 187         gtk_widget_show_all (this->priv->menu);
 188 }
 189
 190
 191 /*****************************************************************************/
 192 /* Menu positioning function.                                                */
 193 /*****************************************************************************/
 194 static void
 195 menu_position_function (GtkMenu       *menu,
 196                         gint          *x,
 197                         gint          *y,
 198                         gboolean      *push_in,
 199                         glFieldButton *this)
 200 {
 201         GdkScreen          *screen;
 202         gint                w_screen, h_screen;
 203         GdkWindow          *window;
 204         gint                x_window, y_window;
 205         GtkAllocation      *allocation;
 206         gint                x_this, y_this, h_this;
 207         GtkRequisition      menu_requisition;
 208         gint                h_menu, w_menu;
 209
 210         /*
 211          * Screen size
 212          */
 213         screen = gtk_widget_get_screen (GTK_WIDGET (this));
 214         w_screen = gdk_screen_get_width (screen);
 215         h_screen = gdk_screen_get_height (screen);
 216
 217         /*
 218          * Absolute position of "this" window on screen.
 219          */
 220         window = gtk_widget_get_window (GTK_WIDGET (this));
 221         gdk_window_get_origin (window, &x_window, &y_window);
 222
 223         /*
 224          *  Position and size of "this" inside window
 225          */
 226         allocation = &GTK_WIDGET (this)->allocation;
 227         x_this = allocation->x;
 228         y_this = allocation->y;
 229         h_this = allocation->height;
 230
 231         /*
 232          * Size of menu.
 233          */
 234         gtk_widget_size_request (this->priv->menu, &menu_requisition);
 235         h_menu = menu_requisition.height;
 236         w_menu = menu_requisition.width;
 237
 238         /*
 239          * Default position anchored to lower left corner of "this".
 240          */
 241         *x = x_window + x_this;
 242         *y = y_window + y_this + h_this;
 243
 244         /*
 245          * Adjust vertical position if menu if extends past bottom of screen.
 246          */
 247         if ( (*y + h_menu) > h_screen )
 248         {
 249                 *y = y_window + y_this - h_menu;
 250
 251                 if ( *y < 0 )
 252                 {
 253                         *y = h_screen - h_menu;
 254                 }
 255         }
 256
 257         /*
 258          * Adjust horizontal position if menu if extends past edge of screen.
 259          */
 260         if ( (*x + w_menu) > w_screen )
 261         {
 262                 *x = w_screen - w_menu;
 263         }
 264
 265
 266         *push_in = TRUE;
 267 }
 268
 269
 270 /*****************************************************************************/
 271 /* Button "button_press_event" callback.                                     */
 272 /*****************************************************************************/
 273 static gboolean
 274 button_press_event_cb (GtkWidget      *widget,
 275                        GdkEventButton *event,
 276                        glFieldButton  *this)
 277 {
 278         switch (event->button)
 279         {
 280
 281         case 1:
 282                 gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (this), TRUE);
 283
 284                 gtk_menu_popup (GTK_MENU (this->priv->menu),
 285                                 NULL, NULL,
 286                                 (GtkMenuPositionFunc)menu_position_function, this,
 287                                 event->button, event->time);
 288                 break;
 289
 290         default:
 291                 break;
 292
 293         }
 294
 295         return FALSE;
 296 }
 297
 298
 299 /*****************************************************************************/
 300 /* Menu "key selected" callback.                                             */
 301 /*****************************************************************************/
 302 static void
 303 menu_key_selected_cb (glFieldButtonMenu     *menu,
 304                       gchar                 *field,
 305                       glFieldButton         *this)
 306 {
 307         g_signal_emit (this, signals[KEY_SELECTED], 0, field);
 308 }
 309
 310
 311 /*****************************************************************************/
 312 /* Menu "selection done" callback.                                           */
 313 /*****************************************************************************/
 314 static void
 315 menu_selection_done_cb (GtkMenuShell         *object,
 316                         glFieldButton        *this)
 317 {
 318         gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (this), FALSE);
 319 }
 320
 321
 322
 323 /*
 324  * Local Variables:       -- emacs
 325  * mode: C                -- emacs
 326  * c-basic-offset: 8      -- emacs
 327  * tab-width: 8           -- emacs
 328  * indent-tabs-mode: nil  -- emacs
 329  * End:                   -- emacs
 330  */