Import MxGtkLightSwitch from Mx

Available under the terms of the LGPL 2.1.

4 files changed, 617 insertions, 2 deletions

diff --git a/libempathy-gtk/Makefile.am b/libempathy-gtk/Makefile.am
index 390d37cbb..1b71e03a3 100644
--- a/libempathy-gtk/Makefile.am
+++ b/libempathy-gtk/Makefile.am
@@ -90,7 +90,9 @@ libempathy_gtk_handwritten_source =            	\
 	empathy-theme-irc.c			\
 	empathy-theme-manager.c			\
 	empathy-tls-dialog.c			\
-	empathy-ui-utils.c
+	empathy-ui-utils.c			\
+	mx-gtk-light-switch.c			\
+	$(NULL)
 
 libempathy_gtk_headers =			\
 	empathy-account-chooser.h		\
@@ -152,7 +154,9 @@ libempathy_gtk_headers =			\
 	empathy-theme-irc.h			\
 	empathy-theme-manager.h			\
 	empathy-tls-dialog.h			\
-	empathy-ui-utils.h
+	empathy-ui-utils.h			\
+	mx-gtk-light-switch.h			\
+	$(NULL)
 
 libempathy_gtk_la_SOURCES =			\
 	$(libempathy_gtk_handwritten_source)	\
diff --git a/libempathy-gtk/mx-gtk-light-switch.c b/libempathy-gtk/mx-gtk-light-switch.c
new file mode 100644
index 000000000..a1427a318
--- /dev/null
+++ b/libempathy-gtk/mx-gtk-light-switch.c
@@ -0,0 +1,539 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright 2009 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * Boston, MA 02111-1307, USA.
+ *
+ */
+
+/**
+ * SECTION:mx-gtk-light-switch
+ * @short_description: a toggle switch between two states
+ *
+ * A visual representation of a toggle switch that can move between two states.
+ */
+
+#include <config.h>
+#include "mx-gtk-light-switch.h"
+
+#include <glib/gi18n-lib.h>
+
+#if 0
+/* We use the special gcc constructor attribute so we can avoid
+ * requiring an init function to get translations to work! This
+ * function is also in mx-utils but we also need it here
+ * because that is a separate library */
+static void __attribute__ ((constructor))
+_start (void)
+{
+  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+}
+#endif
+
+G_DEFINE_TYPE (MxGtkLightSwitch, mx_gtk_light_switch, GTK_TYPE_DRAWING_AREA)
+
+#define MX_GTK_LIGHT_SWITCH_GET_PRIVATE(o)                                 \
+  (G_TYPE_INSTANCE_GET_PRIVATE ((o), MX_GTK_TYPE_LIGHT_SWITCH, MxGtkLightSwitchPrivate))
+
+static gboolean mx_gtk_light_switch_configure (GtkWidget         *lightswitch,
+                                               GdkEventConfigure *event);
+static gboolean mx_gtk_light_switch_expose (GtkWidget      *lightswitch,
+                                            GdkEventExpose *event);
+static gboolean mx_gtk_light_switch_button_release (GtkWidget      *lightswitch,
+                                                    GdkEventButton *event);
+static gboolean mx_gtk_light_switch_button_press (GtkWidget      *lightswitch,
+                                                  GdkEventButton *event);
+static gboolean mx_gtk_light_switch_motion_notify (GtkWidget      *lightswitch,
+                                                   GdkEventMotion *event);
+static void mx_gtk_light_switch_size_request (GtkWidget      *lightswitch,
+                                              GtkRequisition *req);
+
+static void mx_gtk_light_switch_style_set (GtkWidget *lightswitch,
+                                           GtkStyle  *previous_style);
+
+enum {
+  SWITCH_FLIPPED,
+  LAST_SIGNAL
+};
+
+static guint mx_gtk_light_switch_signals[LAST_SIGNAL] = { 0 };
+
+enum {
+  PROP_0,
+  PROP_ACTIVE,
+};
+
+typedef struct _MxGtkLightSwitchPrivate MxGtkLightSwitchPrivate;
+
+struct _MxGtkLightSwitchPrivate {
+  gboolean active; /* boolean state of switch */
+  gboolean dragging; /* true if dragging switch */
+  gint     x; /* the x position of the switch */
+  gint     drag_start; /* position dragging started at */
+  gint     drag_threshold;
+  gint     switch_width;
+  gint     switch_height;
+  gint     trough_width;
+  gint     offset; /* offset of the mouse to slider when dragging */
+};
+
+/* MEDIUM VERTICAL BAR U+2759 */
+#define ON_STRING "\342\235\231"
+  /* WHITE CIRCLE U+25CB */
+#define OFF_STRING "\342\227\213"
+
+#define UNAVAILABLE_STRING _("Unavailable")
+
+static void
+mx_gtk_light_switch_set_property (GObject      *object,
+                                  guint         prop_id,
+                                  const GValue *value,
+                                  GParamSpec   *pspec)
+{
+  MxGtkLightSwitch *ls;
+
+  ls = MX_GTK_LIGHT_SWITCH (object);
+
+  switch (prop_id)
+    {
+    case PROP_ACTIVE:
+      mx_gtk_light_switch_set_active (ls, g_value_get_boolean (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+mx_gtk_light_switch_get_property (GObject      *object,
+                                  guint         prop_id,
+                                  GValue       *value,
+                                  GParamSpec   *pspec)
+{
+  MxGtkLightSwitchPrivate *priv;
+
+  priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (object);
+
+  switch (prop_id)
+    {
+    case PROP_ACTIVE:
+      g_value_set_boolean (value, priv->active);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+mx_gtk_light_switch_class_init (MxGtkLightSwitchClass *klass)
+{
+  GObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+  GParamSpec *spec;
+
+  object_class = G_OBJECT_CLASS (klass);
+  widget_class = GTK_WIDGET_CLASS (klass);
+
+  object_class->set_property = mx_gtk_light_switch_set_property;
+  object_class->get_property = mx_gtk_light_switch_get_property;
+
+  widget_class->configure_event = mx_gtk_light_switch_configure;
+  widget_class->expose_event = mx_gtk_light_switch_expose;
+  widget_class->button_release_event = mx_gtk_light_switch_button_release;
+  widget_class->button_press_event = mx_gtk_light_switch_button_press;
+  widget_class->motion_notify_event = mx_gtk_light_switch_motion_notify;
+  widget_class->size_request = mx_gtk_light_switch_size_request;
+  widget_class->style_set = mx_gtk_light_switch_style_set;
+
+  spec = g_param_spec_boolean ("active",
+                               "Active",
+                               "Is the light switch on or not",
+                               FALSE,
+                               G_PARAM_READWRITE);
+  g_object_class_install_property (object_class, PROP_ACTIVE, spec);
+
+  /* MxGtkLightSwitch signals */
+  mx_gtk_light_switch_signals[SWITCH_FLIPPED] =
+    g_signal_new ("switch-flipped",
+                  G_OBJECT_CLASS_TYPE (object_class),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (MxGtkLightSwitchClass, switch_flipped),
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__BOOLEAN,
+                  G_TYPE_NONE, 1,
+                  G_TYPE_BOOLEAN);
+
+  g_type_class_add_private (klass,
+                            sizeof (MxGtkLightSwitchPrivate));
+}
+
+static void
+mx_gtk_light_switch_init (MxGtkLightSwitch *self)
+{
+  MxGtkLightSwitchPrivate *priv;
+
+  priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (self);
+  priv->active = FALSE;
+  priv->x = 0;
+
+  /* add events, do initial draw/update, etc */
+  gtk_widget_add_events (GTK_WIDGET (self),
+                         GDK_BUTTON_PRESS_MASK
+                         | GDK_BUTTON_RELEASE_MASK
+                         | GDK_POINTER_MOTION_MASK);
+}
+
+static void
+draw (GtkWidget *lightswitch,
+      cairo_t   *cr)
+{
+  MxGtkLightSwitchPrivate *priv;
+
+  gint on_label_x;
+  gint off_label_x;
+/*
+  gint label_width;
+  gint label_height;
+*/
+  GtkStyle *style;
+//  PangoLayout *layout;
+//  PangoContext *context;
+  GtkStateType state_type;
+
+  priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+  style = lightswitch->style;
+#if GTK_CHECK_VERSION (2,19,5)
+  state_type = gtk_widget_get_state (lightswitch);
+#else
+  state_type = GTK_WIDGET_STATE (lightswitch);
+#endif
+
+  on_label_x = (priv->trough_width / 5) * 0.75;
+  off_label_x = (priv->trough_width / 8) * 5;
+
+  /* draw the trough */
+  gtk_paint_box (style,
+                 lightswitch->window,
+                 (state_type != GTK_STATE_INSENSITIVE && priv->active)
+                 ? GTK_STATE_SELECTED : state_type,
+                 GTK_SHADOW_IN,
+                 NULL,
+                 NULL,
+                 "light-switch-trough",
+                 0,
+                 0,
+                 (priv->trough_width),
+                 priv->switch_height);
+
+  if (state_type == GTK_STATE_INSENSITIVE)
+    return;
+#if 0
+  if (state_type == GTK_STATE_INSENSITIVE)
+    {
+      context = gdk_pango_context_get ();
+      layout = pango_layout_new (context);
+      g_object_unref (context);
+
+      pango_layout_set_font_description (layout, style->font_desc);
+      pango_layout_set_text (layout, UNAVAILABLE_STRING, -1);
+      pango_layout_get_size (layout, &label_width, &label_height);
+      gtk_paint_layout (style, lightswitch->window, state_type, FALSE,
+                        NULL, lightswitch, "lighswitch-label",
+                        (priv->trough_width - (label_width / PANGO_SCALE)) / 2,
+                        (priv->switch_height - (label_height / PANGO_SCALE)) / 2,
+                        layout);
+      g_object_unref (layout);
+      return;
+    }
+
+  /* Draw the first label; "On" */
+  context = gdk_pango_context_get ();
+  layout = pango_layout_new (context);
+  g_object_unref (context);
+  pango_layout_set_font_description (layout,
+                                     style->font_desc);
+  pango_layout_set_text (layout, ON_STRING, -1);
+  pango_layout_get_size (layout,
+                         &label_width,
+                         &label_height);
+  gtk_paint_layout (style,
+                    lightswitch->window,
+                    (priv->active) ? GTK_STATE_SELECTED : GTK_STATE_NORMAL,
+                    FALSE,
+                    NULL,
+                    (GtkWidget*) lightswitch,
+                    "lightswitch-label",
+                    on_label_x,
+                    (priv->switch_height
+                     - (label_height / PANGO_SCALE)) / 2,
+                    layout);
+
+  pango_layout_set_text (layout, OFF_STRING, -1);
+  pango_layout_get_size (layout,
+                         &label_width,
+                         &label_height);
+  gtk_paint_layout (style,
+                    lightswitch->window,
+                    (priv->active) ? GTK_STATE_SELECTED : GTK_STATE_NORMAL,
+                    FALSE,
+                    NULL,
+                    (GtkWidget*) lightswitch,
+                    "lightswitch-label",
+                    off_label_x,
+                    (priv->switch_height
+                     - (label_height / PANGO_SCALE)) / 2,
+                    layout);
+  g_object_unref (layout);
+#endif
+  /* draw the switch itself */
+  gtk_paint_box (style,
+                 lightswitch->window,
+#if GTK_CHECK_VERSION (2,19,5)
+                 gtk_widget_get_state (lightswitch),
+#else
+                 GTK_WIDGET_STATE (lightswitch),
+#endif
+                 GTK_SHADOW_OUT,
+                 NULL,
+                 NULL,
+                 "light-switch-handle",
+                 priv->x + style->xthickness,
+                 style->ythickness,
+                 priv->switch_width - style->xthickness * 2,
+                 priv->switch_height - style->ythickness * 2);
+
+}
+
+static void
+mx_gtk_light_switch_size_request (GtkWidget      *lightswitch,
+                                  GtkRequisition *req)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  req->height = priv->switch_height;
+  req->width = priv->trough_width;
+}
+
+static void
+mx_gtk_light_switch_style_set (GtkWidget *lightswitch,
+                               GtkStyle  *previous_style)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+  PangoLayout *layout;
+  gint label_width, label_height;
+
+  layout = gtk_widget_create_pango_layout (GTK_WIDGET (lightswitch), NULL);
+  pango_layout_set_text (layout, UNAVAILABLE_STRING, -1);
+  pango_layout_get_pixel_size (layout, &label_width, &label_height);
+  g_object_unref (layout);
+
+  /* MxToggle is 105x39, so make sure light-switch is at least this size */
+  priv->trough_width = MAX (103, label_width);
+  priv->switch_width = (priv->trough_width / 2) * 1.1;
+  //priv->switch_height = MAX (39, label_height);
+  priv->switch_height = 24;
+  priv->switch_width = 50;
+  priv->trough_width = 98;
+}
+
+static gboolean
+mx_gtk_light_switch_configure (GtkWidget         *lightswitch,
+                               GdkEventConfigure *event)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  if (priv->active)
+    priv->x = priv->trough_width - priv->switch_width;
+  else
+    priv->x = 0;
+
+  return FALSE;
+}
+
+static gboolean
+mx_gtk_light_switch_expose (GtkWidget      *lightswitch,
+                            GdkEventExpose *event)
+{
+  cairo_t *cr;
+  cr = gdk_cairo_create (lightswitch->window);
+
+  cairo_rectangle (cr,
+                   event->area.x,
+                   event->area.y,
+                   event->area.width,
+                   event->area.height);
+
+  cairo_clip (cr);
+
+  draw (lightswitch, cr);
+
+  cairo_destroy (cr);
+
+  return FALSE;
+}
+
+static gboolean
+mx_gtk_light_switch_motion_notify (GtkWidget      *lightswitch,
+                                   GdkEventMotion *event)
+{
+  MxGtkLightSwitchPrivate *priv;
+
+  priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  if (ABS (event->x - priv->drag_start) < priv->drag_threshold)
+    return TRUE;
+
+  if (event->state & GDK_BUTTON1_MASK)
+    {
+      gint position = event->x - priv->offset;
+
+      if (position > (priv->trough_width - priv->switch_width))
+        priv->x = (priv->trough_width - priv->switch_width);
+      else if (position < 0)
+        priv->x = 0;
+      else
+        priv->x = position;
+
+      priv->dragging = TRUE;
+      gtk_widget_queue_draw ((GtkWidget *) lightswitch);
+    }
+
+  return TRUE;
+}
+
+/**
+ * mx_gtk_light_switch_get_active:
+ * @lightswitch: A #MxGtkLightSwitch
+ *
+ * Get the value of the "active" property
+ *
+ * Returns: #TRUE if the switch is "on"
+ */
+gboolean
+mx_gtk_light_switch_get_active (MxGtkLightSwitch *lightswitch)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  return priv->active;
+}
+
+/**
+ * mx_gtk_light_switch_set_active:
+ * @lightswitch: A #MxGtkLightSwitch
+ * @active: #TRUE to set the switch to its ON state
+ *
+ * Set the value of the "active" property
+ *
+ */
+void
+mx_gtk_light_switch_set_active (MxGtkLightSwitch *lightswitch,
+                                gboolean          active)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  if (priv->active == active)
+    {
+      return;
+    }
+  else
+    {
+      priv->active = active;
+      if (active == TRUE)
+        {
+          priv->x = priv->trough_width - priv->switch_width;
+        }
+      else
+        {
+          priv->x = 0;
+        }
+
+      gtk_widget_queue_draw ((GtkWidget *) lightswitch);
+
+      g_object_notify (G_OBJECT (lightswitch), "active");
+      g_signal_emit (lightswitch,
+                     mx_gtk_light_switch_signals[SWITCH_FLIPPED],
+                     0,
+                     priv->active);
+    }
+}
+
+static gboolean
+mx_gtk_light_switch_button_press (GtkWidget      *lightswitch,
+                                  GdkEventButton *event)
+{
+  MxGtkLightSwitchPrivate *priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  if (priv->active)
+    priv->offset = event->x - (priv->trough_width - priv->switch_width);
+  else
+    priv->offset = event->x;
+
+  priv->drag_start = event->x;
+
+  g_object_get (gtk_widget_get_settings (lightswitch),
+                "gtk-dnd-drag-threshold", &priv->drag_threshold,
+                NULL);
+
+  return FALSE;
+}
+
+static gboolean
+mx_gtk_light_switch_button_release (GtkWidget      *lightswitch,
+                                    GdkEventButton *event)
+{
+  MxGtkLightSwitchPrivate *priv;
+
+  priv = MX_GTK_LIGHT_SWITCH_GET_PRIVATE (lightswitch);
+
+  /* detect whereabouts we are and "drop" into a state */
+  if (priv->dragging)
+    {
+      priv->dragging = FALSE;
+      if (priv->x + (priv->switch_width / 2) > priv->trough_width / 2)
+        {
+          mx_gtk_light_switch_set_active ((MxGtkLightSwitch *) lightswitch, TRUE);
+          priv->x = priv->trough_width - priv->switch_width;
+        }
+      else
+        {
+          mx_gtk_light_switch_set_active ((MxGtkLightSwitch *) lightswitch, FALSE);
+          priv->x = 0;
+        }
+      /* we always need to queue a redraw after dragging to put the slider back
+       * in the correct place */
+      gtk_widget_queue_draw ((GtkWidget *) lightswitch);
+    }
+  else
+    {
+      mx_gtk_light_switch_set_active ((MxGtkLightSwitch *) lightswitch, !priv->active);
+    }
+
+  return FALSE;
+}
+
+/**
+ * mx_gtk_light_switch_new:
+ *
+ * Create a #MxGtkLightSwitch
+ *
+ * Returns: a newly allocated #MxGtkLightSwitch
+ */
+GtkWidget*
+mx_gtk_light_switch_new (void)
+{
+  return g_object_new (MX_GTK_TYPE_LIGHT_SWITCH, NULL);
+}
+
diff --git a/libempathy-gtk/mx-gtk-light-switch.h b/libempathy-gtk/mx-gtk-light-switch.h
new file mode 100644
index 000000000..88fdf69e6
--- /dev/null
+++ b/libempathy-gtk/mx-gtk-light-switch.h
@@ -0,0 +1,71 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright 2009 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ * Boston, MA 02111-1307, USA.
+ *
+ */
+#ifndef _MX_GTK_LIGHT_SWITCH
+#define _MX_GTK_LIGHT_SWITCH
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define MX_GTK_TYPE_LIGHT_SWITCH mx_gtk_light_switch_get_type ()
+
+#define MX_GTK_LIGHT_SWITCH(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), MX_GTK_TYPE_LIGHT_SWITCH, MxGtkLightSwitch))
+
+#define MX_GTK_LIGHT_SWITCH_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), MX_GTK_TYPE_LIGHT_SWITCH, MxGtkLightSwitchClass))
+
+#define MX_GTK_IS_LIGHT_SWITCH(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MX_GTK_TYPE_LIGHT_SWITCH))
+
+#define MX_GTK_IS_LIGHT_SWITCH_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), MX_GTK_TYPE_LIGHT_SWITCH))
+
+#define MX_GTK_LIGHT_SWITCH_GET_CLASS(obj) \
+  (G_TYPE_INSTANCE_GET_CLASS ((obj), MX_GTK_TYPE_LIGHT_SWITCH, MxGtkLightSwitchClass))
+
+/**
+ * MxGtkLightSwitch:
+ *
+ * The contents of this structure are private and should only be accessed
+ * through the public API.
+ */
+typedef struct {
+  /*< private >*/
+  GtkDrawingArea parent;
+} MxGtkLightSwitch;
+
+typedef struct {
+  GtkDrawingAreaClass parent_class;
+
+  void (*switch_flipped) (MxGtkLightSwitch *lightswitch, gboolean state);
+} MxGtkLightSwitchClass;
+
+GType mx_gtk_light_switch_get_type (void);
+
+void     mx_gtk_light_switch_set_active (MxGtkLightSwitch *lightswitch,
+                                         gboolean          active);
+gboolean mx_gtk_light_switch_get_active (MxGtkLightSwitch *lightswitch);
+
+GtkWidget* mx_gtk_light_switch_new (void);
+
+G_END_DECLS
+
+#endif /* _MX_GTK_LIGHT_SWITCH */
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 2311bb096..4b5af18b9 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -72,6 +72,7 @@ libempathy-gtk/empathy-theme-manager.c
 libempathy-gtk/empathy-tls-dialog.c
 libempathy-gtk/empathy-ui-utils.c
 libempathy-gtk/totem-subtitle-encoding.c
+libempathy-gtk/mx-gtk-light-switch.c
 
 nautilus-sendto-plugin/empathy-nautilus-sendto.c