vcs.maemo.org Git - hildon/blob - src/hildon-vvolumebar.c

   1 /*
   2  * This file is a part of hildon
   3  *
   4  * Copyright (C) 2005, 2006 Nokia Corporation, all rights reserved.
   5  *
   6  * Contact: Michael Dominic Kostrzewa <michael.kostrzewa@nokia.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; version 2.1 of
  11  * the License.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 /*
  26  * SECTION:hildon-vvolumebar
  27  * @short_description: A widget that displays a vertical volume bar
  28  * @see_also: #HildonVolumebar, #HildonHVolumebar
  29  *
  30  * #HildonVVolumebar is a subclass of #HildonVolumebar.  It displays a
  31  * vertical volume bar that allows increasing or decreasing volume
  32  * within a predefined range, and muting when users click the mute icon.
  33  */
  34
  35 #ifdef                                          HAVE_CONFIG_H
  36 #include                                        <config.h>
  37 #endif
  38
  39 #include                                        "hildon-vvolumebar.h"
  40 #include                                        <gtk/gtk.h>
  41 #include                                        "hildon-volumebar-range.h"
  42 #include                                        "hildon-volumebar-private.h"
  43
  44 /* Volume bar */
  45 #define                                         DEFAULT_BAR_WIDTH 58
  46
  47 #define                                         MINIMUM_BAR_HEIGHT 165
  48
  49 /* Toggle button */
  50
  51 #define                                         DEFAULT_VERTICAL_TBUTTON_WIDTH 26
  52
  53 #define                                         DEFAULT_VERTICAL_TBUTTON_HEIGHT 26
  54
  55 #define                                         DEFAULT_ENDING_SIZE 20
  56
  57 /* Gap to leave for mute button */
  58
  59 #define                                         HORIZONTAL_MUTE_GAP 16
  60
  61 #define                                         VERTICAL_MUTE_GAP 6
  62
  63 static HildonVolumebarClass*                    parent_class;
  64
  65 static void
  66 hildon_vvolumebar_class_init                    (HildonVVolumebarClass * klass);
  67
  68 static void
  69 hildon_vvolumebar_init                          (HildonVVolumebar * vvolumebar);
  70
  71 static gboolean
  72 hildon_vvolumebar_expose                        (GtkWidget * widget,
  73                                                  GdkEventExpose * event);
  74
  75 static void
  76 hildon_vvolumebar_size_request                  (GtkWidget * widget,
  77                                                  GtkRequisition * requisition);
  78
  79 static void
  80 hildon_vvolumebar_size_allocate                 (GtkWidget * widget,
  81                                                  GtkAllocation * allocation);
  82
  83 /**
  84  * hildon_vvolumebar_get_type:
  85  *
  86  * Initializes and returns the type of a hildon vvolumebar.
  87  *
  88  * @Returns: GType of #HildonVVolumebar
  89  */
  90 GType G_GNUC_CONST
  91 hildon_vvolumebar_get_type                      (void)
  92 {
  93     static GType type = 0;
  94
  95     if (!type) {
  96         static const GTypeInfo info = {
  97             sizeof (HildonVVolumebarClass),
  98             NULL,       /* base_init */
  99             NULL,       /* base_finalize */
 100             (GClassInitFunc) hildon_vvolumebar_class_init,     /* class_init */
 101             NULL,       /* class_finalize */
 102             NULL,       /* class_data */
 103             sizeof (HildonVVolumebar),
 104             0,
 105             (GInstanceInitFunc) hildon_vvolumebar_init,
 106         };
 107         type =
 108             g_type_register_static (HILDON_TYPE_VOLUMEBAR,
 109                     "HildonVVolumebar", &info, 0);
 110     }
 111     return type;
 112 }
 113
 114 static void
 115 hildon_vvolumebar_class_init                    (HildonVVolumebarClass *klass)
 116 {
 117     GtkWidgetClass *volumebar_class = GTK_WIDGET_CLASS(klass);
 118
 119     parent_class = g_type_class_peek_parent(klass);
 120
 121     volumebar_class->size_request   = hildon_vvolumebar_size_request;
 122     volumebar_class->size_allocate  = hildon_vvolumebar_size_allocate;
 123     volumebar_class->expose_event   = hildon_vvolumebar_expose;
 124 }
 125
 126 static void
 127 hildon_vvolumebar_init                          (HildonVVolumebar *vvolumebar)
 128 {
 129     HildonVolumebarPrivate *priv;
 130
 131     priv = HILDON_VOLUMEBAR_GET_PRIVATE (vvolumebar);
 132     g_assert (priv);
 133
 134     priv->volumebar = HILDON_VOLUMEBAR_RANGE (hildon_volumebar_range_new
 135             (GTK_ORIENTATION_VERTICAL));
 136
 137     GTK_WIDGET_UNSET_FLAGS (GTK_WIDGET (vvolumebar), GTK_CAN_FOCUS);
 138
 139     gtk_widget_set_parent (GTK_WIDGET (priv->tbutton), GTK_WIDGET (vvolumebar));
 140     gtk_widget_set_parent (GTK_WIDGET (priv->volumebar), GTK_WIDGET (vvolumebar));
 141
 142     gtk_scale_set_draw_value (GTK_SCALE (priv->volumebar), FALSE);
 143
 144     /* Signals */
 145     g_signal_connect_swapped(G_OBJECT(priv->volumebar), "value-changed",
 146             G_CALLBACK(hildon_volumebar_level_change),
 147             vvolumebar);
 148
 149     g_signal_connect_swapped(priv->tbutton, "toggled",
 150             G_CALLBACK(hildon_volumebar_mute_toggled), vvolumebar);
 151
 152     /* FIXME Not sure why this is here */
 153     gtk_widget_show (GTK_WIDGET (priv->volumebar));
 154 }
 155
 156 /**
 157  * hildon_vvolumebar_new:
 158  *
 159  * Creates a new #HildonVVolumebar widget.
 160  *
 161  * Returns: a new #HildonVVolumebar
 162  */
 163 GtkWidget*
 164 hildon_vvolumebar_new                           (void)
 165 {
 166     return GTK_WIDGET (g_object_new(HILDON_TYPE_VVOLUMEBAR, NULL));
 167 }
 168
 169 static gboolean
 170 hildon_vvolumebar_expose                        (GtkWidget *widget,
 171                                                  GdkEventExpose *event)
 172 {
 173
 174     HildonVolumebarPrivate *priv;
 175
 176     priv = HILDON_VOLUMEBAR_GET_PRIVATE(HILDON_VOLUMEBAR(widget));
 177     g_assert (priv);
 178
 179     if (GTK_WIDGET_DRAWABLE (widget)) {
 180         /* Paint background */
 181         gtk_paint_box (widget->style, widget->window,
 182                 GTK_WIDGET_STATE (priv->volumebar), GTK_SHADOW_OUT,
 183                 NULL, widget, "background",
 184                 widget->allocation.x,
 185                 widget->allocation.y,
 186                 widget->allocation.width,
 187                 widget->allocation.height);
 188
 189         /* The contents of the widget can paint themselves */
 190         (*GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 191     }
 192
 193     return FALSE;
 194 }
 195
 196 static void
 197 hildon_vvolumebar_size_request                  (GtkWidget *widget,
 198                                                  GtkRequisition *requisition)
 199 {
 200     requisition->height = MINIMUM_BAR_HEIGHT;
 201     requisition->width = DEFAULT_BAR_WIDTH;
 202 }
 203
 204 static void
 205 hildon_vvolumebar_size_allocate                 (GtkWidget *widget,
 206                                                  GtkAllocation *allocation)
 207 {
 208     HildonVolumebarPrivate *priv;
 209
 210     GtkAllocation range_allocation, button_allocation;
 211
 212     priv = HILDON_VOLUMEBAR_GET_PRIVATE(widget);
 213     g_assert (priv);
 214
 215     /* Center the widget horizontally */
 216     if (allocation->width > DEFAULT_BAR_WIDTH) {
 217         allocation->x +=
 218             (allocation->width - DEFAULT_BAR_WIDTH) / 2;
 219         allocation->width = DEFAULT_BAR_WIDTH;
 220     }
 221
 222     GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
 223
 224     if (priv->volumebar && GTK_WIDGET_VISIBLE (priv->volumebar)) {
 225         /* Allocate space for the slider */
 226         range_allocation.x = allocation->x;
 227         range_allocation.y = allocation->y + DEFAULT_ENDING_SIZE;
 228
 229         range_allocation.width = DEFAULT_BAR_WIDTH;
 230
 231         if (priv->tbutton && GTK_WIDGET_VISIBLE (priv->tbutton))
 232         {
 233             /* Leave room for the mute button */
 234             range_allocation.height = MAX (0,
 235                     allocation->height
 236                     - 2 * DEFAULT_ENDING_SIZE
 237                     - DEFAULT_VERTICAL_TBUTTON_HEIGHT
 238                     - VERTICAL_MUTE_GAP);
 239         }
 240
 241         else
 242         {
 243             range_allocation.height = MAX (0,
 244                     allocation->height
 245                     - 2 * DEFAULT_ENDING_SIZE);
 246         }
 247
 248         gtk_widget_size_allocate (GTK_WIDGET (priv->volumebar),
 249                 &range_allocation);
 250     }
 251
 252     if (priv->tbutton && GTK_WIDGET_VISIBLE (priv->tbutton)) {
 253         /* Allocate space for the mute button */
 254         button_allocation.x = allocation->x + HORIZONTAL_MUTE_GAP;
 255         button_allocation.y = allocation->y + allocation->height -
 256             VERTICAL_MUTE_GAP - 2 * DEFAULT_ENDING_SIZE;
 257         button_allocation.width = DEFAULT_VERTICAL_TBUTTON_WIDTH;
 258         button_allocation.height = DEFAULT_VERTICAL_TBUTTON_HEIGHT;
 259         gtk_widget_size_allocate (GTK_WIDGET (priv->tbutton),
 260                 &button_allocation);
 261     }
 262 }