git.sur5r.net Git - glabels/blob - src/font-combo.c

   1 /*
   2  *  font-combo.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 "font-combo.h"
  24
  25 #include <glib/gi18n.h>
  26 #include <gtk/gtk.h>
  27
  28 #include "font-combo-menu.h"
  29 #include "font-util.h"
  30 #include "marshal.h"
  31
  32
  33
  34 /*========================================================*/
  35 /* Private types.                                         */
  36 /*========================================================*/
  37
  38 /** GL_FONT_COMBO Private fields */
  39 struct _glFontComboPrivate {
  40
  41         gchar      *font_family;
  42
  43         GtkWidget  *label;
  44
  45         GtkWidget  *menu;
  46 };
  47
  48 enum {
  49         CHANGED,
  50         LAST_SIGNAL
  51 };
  52
  53
  54 /*========================================================*/
  55 /* Private globals.                                       */
  56 /*========================================================*/
  57
  58 static guint signals[LAST_SIGNAL] = {0};
  59
  60
  61 /*========================================================*/
  62 /* Private function prototypes.                           */
  63 /*========================================================*/
  64
  65 static void gl_font_combo_finalize      (GObject             *object);
  66
  67 static gboolean
  68 button_press_event_cb (GtkWidget      *widget,
  69                        GdkEventButton *event,
  70                        glFontCombo    *this);
  71
  72 static void
  73 menu_font_changed_cb   (glFontComboMenu  *menu,
  74                         glFontCombo      *this);
  75
  76 static void
  77 menu_selection_done_cb (GtkMenuShell     *object,
  78                         glFontCombo      *this);
  79
  80
  81 /*****************************************************************************/
  82 /* Object infrastructure.                                                    */
  83 /*****************************************************************************/
  84 G_DEFINE_TYPE (glFontCombo, gl_font_combo, GTK_TYPE_TOGGLE_BUTTON)
  85
  86
  87 /*****************************************************************************/
  88 /* Class Init Function.                                                      */
  89 /*****************************************************************************/
  90 static void
  91 gl_font_combo_class_init (glFontComboClass *class)
  92 {
  93         GObjectClass      *gobject_class = (GObjectClass *) class;
  94
  95         gl_font_combo_parent_class = g_type_class_peek_parent (class);
  96
  97         gobject_class->finalize = gl_font_combo_finalize;
  98
  99         signals[CHANGED] =
 100                 g_signal_new ("changed",
 101                               G_OBJECT_CLASS_TYPE (gobject_class),
 102                               G_SIGNAL_RUN_LAST,
 103                               G_STRUCT_OFFSET (glFontComboClass, changed),
 104                               NULL, NULL,
 105                               gl_marshal_VOID__VOID,
 106                               G_TYPE_NONE, 0);
 107 }
 108
 109
 110 /*****************************************************************************/
 111 /* Object Instance Init Function.                                            */
 112 /*****************************************************************************/
 113 static void
 114 gl_font_combo_init (glFontCombo *this)
 115 {
 116         GtkWidget *hbox;
 117         GtkWidget *arrow;
 118
 119         this->priv = g_new0 (glFontComboPrivate, 1);
 120
 121         hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 3);
 122         gtk_container_add (GTK_CONTAINER (this), hbox);
 123
 124         this->priv->label = gtk_label_new ("");
 125         gtk_misc_set_alignment (GTK_MISC (this->priv->label), 0.0, 0.5);
 126         gtk_widget_set_size_request (this->priv->label, 180, -1);
 127         gtk_box_pack_start (GTK_BOX (hbox), this->priv->label, TRUE, TRUE, 0);
 128
 129         arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_IN);
 130         gtk_box_pack_end (GTK_BOX (hbox), arrow, FALSE, FALSE, 0);
 131
 132         g_signal_connect (this, "button_press_event",
 133                           G_CALLBACK(button_press_event_cb), this);
 134 }
 135
 136
 137 /*****************************************************************************/
 138 /* Finalize Method.                                                          */
 139 /*****************************************************************************/
 140 static void
 141 gl_font_combo_finalize (GObject *object)
 142 {
 143         glFontCombo    *this;
 144
 145         g_return_if_fail (object && IS_GL_FONT_COMBO (object));
 146         this = GL_FONT_COMBO (object);
 147
 148         g_free (this->priv->font_family);
 149         g_object_ref_sink (this->priv->menu);
 150         g_free (this->priv);
 151
 152         G_OBJECT_CLASS (gl_font_combo_parent_class)->finalize (object);
 153 }
 154
 155
 156 /*****************************************************************************/
 157 /** New Object Generator.                                                    */
 158 /*****************************************************************************/
 159 GtkWidget *
 160 gl_font_combo_new (const gchar  *font_family)
 161 {
 162         glFontCombo  *this;
 163
 164         this = g_object_new (TYPE_GL_FONT_COMBO, NULL);
 165
 166         this->priv->font_family = gl_font_util_validate_family (font_family);
 167
 168         gtk_label_set_text (GTK_LABEL (this->priv->label), this->priv->font_family);
 169
 170         this->priv->menu = gl_font_combo_menu_new ();
 171
 172         gtk_widget_show_all (this->priv->menu);
 173
 174         g_signal_connect (this->priv->menu, "font_changed",
 175                           G_CALLBACK (menu_font_changed_cb), this);
 176         g_signal_connect (this->priv->menu, "selection_done",
 177                           G_CALLBACK (menu_selection_done_cb), this);
 178
 179         return GTK_WIDGET (this);
 180 }
 181
 182
 183 /*****************************************************************************/
 184 /** Set relief style.                                                        */
 185 /*****************************************************************************/
 186 void
 187 gl_font_combo_set_relief( glFontCombo    *this,
 188                           GtkReliefStyle  relief )
 189 {
 190         gtk_button_set_relief (GTK_BUTTON (this), relief);
 191 }
 192
 193
 194 /*****************************************************************************/
 195 /* Set font family.                                                          */
 196 /*****************************************************************************/
 197 void
 198 gl_font_combo_set_family (glFontCombo  *this,
 199                           const gchar  *font_family)
 200 {
 201
 202         this->priv->font_family = gl_font_util_validate_family (font_family);
 203
 204         gtk_label_set_text (GTK_LABEL (this->priv->label), this->priv->font_family);
 205 }
 206
 207
 208 /*****************************************************************************/
 209 /* Get font family.                                                          */
 210 /*****************************************************************************/
 211 gchar *
 212 gl_font_combo_get_family (glFontCombo  *this)
 213 {
 214         return g_strdup (this->priv->font_family);
 215 }
 216
 217
 218 /*****************************************************************************/
 219 /* Menu positioning function.                                                */
 220 /*****************************************************************************/
 221 static void
 222 menu_position_function (GtkMenu      *menu,
 223                         gint         *x,
 224                         gint         *y,
 225                         gboolean     *push_in,
 226                         glFontCombo  *this)
 227 {
 228         GdkScreen          *screen;
 229         gint                w_screen, h_screen;
 230         GdkWindow          *window;
 231         gint                x_window, y_window;
 232         GtkAllocation       allocation;
 233         gint                x_this, y_this, h_this;
 234         GtkRequisition      menu_requisition;
 235         gint                h_menu, w_menu;
 236
 237         /*
 238          * Screen size
 239          */
 240         screen = gtk_widget_get_screen (GTK_WIDGET (this));
 241         w_screen = gdk_screen_get_width (screen);
 242         h_screen = gdk_screen_get_height (screen);
 243
 244         /*
 245          * Absolute position of "this" window on screen.
 246          */
 247         window = gtk_widget_get_window (GTK_WIDGET (this));
 248         gdk_window_get_origin (window, &x_window, &y_window);
 249
 250         /*
 251          *  Position and size of "this" inside window
 252          */
 253         gtk_widget_get_allocation (GTK_WIDGET (this), &allocation);
 254         x_this = allocation.x;
 255         y_this = allocation.y;
 256         h_this = allocation.height;
 257
 258         /*
 259          * Size of menu.
 260          */
 261         gtk_widget_get_preferred_size (this->priv->menu, NULL, &menu_requisition);
 262         h_menu = menu_requisition.height;
 263         w_menu = menu_requisition.width;
 264
 265         /*
 266          * Default position anchored to lower left corner of "this".
 267          */
 268         *x = x_window + x_this;
 269         *y = y_window + y_this + h_this;
 270
 271         /*
 272          * Adjust vertical position if menu if extends past bottom of screen.
 273          */
 274         if ( (*y + h_menu) > h_screen )
 275         {
 276                 *y = y_window + y_this - h_menu;
 277
 278                 if ( *y < 0 )
 279                 {
 280                         *y = h_screen - h_menu;
 281                 }
 282         }
 283
 284         /*
 285          * Adjust horizontal position if menu if extends past edge of screen.
 286          */
 287         if ( (*x + w_menu) > w_screen )
 288         {
 289                 *x = w_screen - w_menu;
 290         }
 291
 292
 293         *push_in = TRUE;
 294 }
 295
 296
 297 /*****************************************************************************/
 298 /* Button "button_press_event" callback.                                     */
 299 /*****************************************************************************/
 300 static gboolean
 301 button_press_event_cb (GtkWidget      *widget,
 302                        GdkEventButton *event,
 303                        glFontCombo   *this)
 304 {
 305         switch (event->button)
 306         {
 307
 308         case 1:
 309                 gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (this), TRUE);
 310
 311                 gtk_menu_popup (GTK_MENU (this->priv->menu),
 312                                 NULL, NULL,
 313                                 (GtkMenuPositionFunc)menu_position_function, this,
 314                                 event->button, event->time);
 315                 break;
 316
 317         default:
 318                 break;
 319
 320         }
 321
 322         return FALSE;
 323 }
 324
 325
 326 /*****************************************************************************/
 327 /* Menu "font changed" callback.                                             */
 328 /*****************************************************************************/
 329 static void
 330 menu_font_changed_cb (glFontComboMenu     *menu,
 331                       glFontCombo         *this)
 332 {
 333         this->priv->font_family = gl_font_combo_menu_get_family (menu);
 334
 335         gtk_label_set_text (GTK_LABEL (this->priv->label), this->priv->font_family);
 336
 337         g_signal_emit (this, signals[CHANGED], 0);
 338 }
 339
 340
 341 /*****************************************************************************/
 342 /* Menu "selection done" callback.                                           */
 343 /*****************************************************************************/
 344 static void
 345 menu_selection_done_cb (GtkMenuShell         *object,
 346                         glFontCombo         *this)
 347 {
 348         gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (this), FALSE);
 349 }
 350
 351
 352
 353 /*
 354  * Local Variables:       -- emacs
 355  * mode: C                -- emacs
 356  * c-basic-offset: 8      -- emacs
 357  * tab-width: 8           -- emacs
 358  * indent-tabs-mode: nil  -- emacs
 359  * End:                   -- emacs
 360  */