Blame gtk/gtkvolumebutton.c

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/* GTK - The GIMP Toolkit
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 * Copyright (C) 2007 Red Hat, Inc.
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 *
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 * Authors:
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 * - Bastien Nocera <bnocera@redhat.com>
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the
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 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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/*
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 * Modified by the GTK+ Team and others 2007.  See the AUTHORS
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 * file for a list of people on the GTK+ Team.  See the ChangeLog
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 * files for a list of changes.  These files are distributed with
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 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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 */
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#include "config.h"
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#include "gtkvolumebutton.h"
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#include "gtkstock.h"
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#include "gtktooltip.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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/**
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 * SECTION:gtkvolumebutton
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 * @Short_description: A button which pops up a volume control
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 * @Title: GtkVolumeButton
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 *
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 * #GtkVolumeButton is a subclass of #GtkScaleButton that has
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 * been tailored for use as a volume control widget with suitable
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 * icons, tooltips and accessible labels.
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 */
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#define EPSILON (1e-10)
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static gboolean	cb_query_tooltip (GtkWidget       *button,
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                                  gint             x,
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                                  gint             y,
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                                  gboolean         keyboard_mode,
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                                  GtkTooltip      *tooltip,
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                                  gpointer         user_data);
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static void	cb_value_changed (GtkVolumeButton *button,
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                                  gdouble          value,
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                                  gpointer         user_data);
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G_DEFINE_TYPE (GtkVolumeButton, gtk_volume_button, GTK_TYPE_SCALE_BUTTON)
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static void
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gtk_volume_button_class_init (GtkVolumeButtonClass *klass)
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{
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}
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static void
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gtk_volume_button_init (GtkVolumeButton *button)
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{
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  GtkScaleButton *sbutton = GTK_SCALE_BUTTON (button);
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  GtkObject *adj;
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  const char *icons[] = {
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	"audio-volume-muted",
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	"audio-volume-high",
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	"audio-volume-low",
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	"audio-volume-medium",
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	NULL
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  };
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  atk_object_set_name (gtk_widget_get_accessible (GTK_WIDGET (button)),
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		       _("Volume"));
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  atk_object_set_description (gtk_widget_get_accessible (GTK_WIDGET (button)),
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		       _("Turns volume down or up"));
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  atk_action_set_description (ATK_ACTION (gtk_widget_get_accessible (GTK_WIDGET (button))),
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			      1,
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			      _("Adjusts the volume"));
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  atk_object_set_name (gtk_widget_get_accessible (sbutton->minus_button),
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		       _("Volume Down"));
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  atk_object_set_description (gtk_widget_get_accessible (sbutton->minus_button),
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		       _("Decreases the volume"));
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  gtk_widget_set_tooltip_text (sbutton->minus_button, _("Volume Down"));
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  atk_object_set_name (gtk_widget_get_accessible (sbutton->plus_button),
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		       _("Volume Up"));
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  atk_object_set_description (gtk_widget_get_accessible (sbutton->plus_button),
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		       _("Increases the volume"));
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  gtk_widget_set_tooltip_text (sbutton->plus_button, _("Volume Up"));
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  gtk_scale_button_set_icons (sbutton, icons);
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  adj = gtk_adjustment_new (0., 0., 1., 0.02, 0.2, 0.);
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  g_object_set (G_OBJECT (button),
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		"adjustment", adj,
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		"size", GTK_ICON_SIZE_SMALL_TOOLBAR,
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		"has-tooltip", TRUE,
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	       	NULL);
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  g_signal_connect (G_OBJECT (button), "query-tooltip",
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		    G_CALLBACK (cb_query_tooltip), NULL);
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  g_signal_connect (G_OBJECT (button), "value-changed",
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		    G_CALLBACK (cb_value_changed), NULL);
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}
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/**
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 * gtk_volume_button_new
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 *
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 * Creates a #GtkVolumeButton, with a range between 0.0 and 1.0, with
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 * a stepping of 0.02. Volume values can be obtained and modified using
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 * the functions from #GtkScaleButton.
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 *
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 * Return value: a new #GtkVolumeButton
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 *
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 * Since: 2.12
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 */
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GtkWidget *
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gtk_volume_button_new (void)
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{
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  GObject *button;
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  button = g_object_new (GTK_TYPE_VOLUME_BUTTON, NULL);
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  return GTK_WIDGET (button);
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}
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static gboolean
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cb_query_tooltip (GtkWidget  *button,
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		  gint        x,
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		  gint        y,
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		  gboolean    keyboard_mode,
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		  GtkTooltip *tooltip,
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		  gpointer    user_data)
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{
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  GtkScaleButton *scale_button = GTK_SCALE_BUTTON (button);
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  GtkAdjustment *adj;
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  gdouble val;
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  char *str;
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  AtkImage *image;
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  image = ATK_IMAGE (gtk_widget_get_accessible (button));
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  adj = gtk_scale_button_get_adjustment (scale_button);
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  val = gtk_scale_button_get_value (scale_button);
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  if (val < (adj->lower + EPSILON))
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    {
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      str = g_strdup (_("Muted"));
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    }
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  else if (val >= (adj->upper - EPSILON))
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    {
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      str = g_strdup (_("Full Volume"));
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    }
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  else
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    {
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      int percent;
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      percent = (int) (100. * val / (adj->upper - adj->lower) + .5);
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      /* Translators: this is the percentage of the current volume,
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       * as used in the tooltip, eg. "49 %".
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       * Translate the "%d" to "%Id" if you want to use localised digits,
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       * or otherwise translate the "%d" to "%d".
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       */
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      str = g_strdup_printf (C_("volume percentage", "%d %%"), percent);
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    }
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  gtk_tooltip_set_text (tooltip, str);
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  atk_image_set_image_description (image, str);
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  g_free (str);
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  return TRUE;
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}
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static void
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cb_value_changed (GtkVolumeButton *button, gdouble value, gpointer user_data)
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{
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  gtk_widget_trigger_tooltip_query (GTK_WIDGET (button));
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}
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#define __GTK_VOLUME_BUTTON_C__
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#include "gtkaliasdef.c"