libempathy-gtk/empathy-avatar-image.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2006-2007 Imendio AB
   4  * Copyright (C) 2007-2008 Collabora Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  *
  21  * Authors: Xavier Claessens <xclaesse@gmail.com>
  22  */
  23
  24 #include "config.h"
  25
  26 #include <glib/gi18n-lib.h>
  27 #include <gdk/gdkkeysyms.h>
  28 #include <gdk/gdk.h>
  29 #include <gtk/gtk.h>
  30 #include <gdk/gdkx.h>
  31
  32 #include <libempathy/empathy-utils.h>
  33 #include "empathy-avatar-image.h"
  34 #include "empathy-ui-utils.h"
  35
  36 /**
  37  * SECTION:empathy-avatar-image
  38  * @title: EmpathyAvatarImage
  39  * @short_description: A widget to display an avatar
  40  * @include: libempathy-gtk/empathy-avatar-image.h
  41  *
  42  * #EmpathyAvatarImage is a widget which displays an avatar.
  43  */
  44
  45 /**
  46  * EmpathyAvatarImage:
  47  * @parent: parent object
  48  *
  49  * Widget which displays an avatar.
  50  */
  51
  52 #define MAX_SMALL 64
  53 #define MAX_LARGE 400
  54
  55 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyAvatarImage)
  56 typedef struct {
  57         GtkWidget   *image;
  58         GtkWidget   *popup;
  59         GdkPixbuf   *pixbuf;
  60 } EmpathyAvatarImagePriv;
  61
  62 static void     avatar_image_finalize                (GObject           *object);
  63 static void     avatar_image_add_filter              (EmpathyAvatarImage *avatar_image);
  64 static void     avatar_image_remove_filter           (EmpathyAvatarImage *avatar_image);
  65 static gboolean avatar_image_button_press_event      (GtkWidget         *widget,
  66                                                       GdkEventButton    *event);
  67 static gboolean avatar_image_button_release_event    (GtkWidget         *widget,
  68                                                       GdkEventButton    *event);
  69
  70 G_DEFINE_TYPE (EmpathyAvatarImage, empathy_avatar_image, GTK_TYPE_EVENT_BOX);
  71
  72 static void
  73 empathy_avatar_image_class_init (EmpathyAvatarImageClass *klass)
  74 {
  75         GObjectClass   *object_class;
  76         GtkWidgetClass *widget_class;
  77
  78         object_class = G_OBJECT_CLASS (klass);
  79         widget_class = GTK_WIDGET_CLASS (klass);
  80
  81         object_class->finalize = avatar_image_finalize;
  82
  83         widget_class->button_press_event   = avatar_image_button_press_event;
  84         widget_class->button_release_event = avatar_image_button_release_event;
  85
  86         g_type_class_add_private (object_class, sizeof (EmpathyAvatarImagePriv));
  87 }
  88
  89 static void
  90 empathy_avatar_image_init (EmpathyAvatarImage *avatar_image)
  91 {
  92         EmpathyAvatarImagePriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (avatar_image,
  93                 EMPATHY_TYPE_AVATAR_IMAGE, EmpathyAvatarImagePriv);
  94
  95         avatar_image->priv = priv;
  96         priv->image = gtk_image_new ();
  97         gtk_container_add (GTK_CONTAINER (avatar_image), priv->image);
  98         empathy_avatar_image_set (avatar_image, NULL);
  99         gtk_widget_show (priv->image);
 100
 101         avatar_image_add_filter (avatar_image);
 102 }
 103
 104 static void
 105 avatar_image_finalize (GObject *object)
 106 {
 107         EmpathyAvatarImagePriv *priv;
 108
 109         priv = GET_PRIV (object);
 110
 111         avatar_image_remove_filter (EMPATHY_AVATAR_IMAGE (object));
 112
 113         if (priv->popup) {
 114                 gtk_widget_destroy (priv->popup);
 115         }
 116
 117         if (priv->pixbuf) {
 118                 g_object_unref (priv->pixbuf);
 119         }
 120
 121         G_OBJECT_CLASS (empathy_avatar_image_parent_class)->finalize (object);
 122 }
 123
 124 static GdkFilterReturn
 125 avatar_image_filter_func (GdkXEvent  *gdkxevent,
 126                           GdkEvent   *event,
 127                           gpointer    data)
 128 {
 129         XEvent                *xevent = gdkxevent;
 130         Atom                   atom;
 131         EmpathyAvatarImagePriv *priv;
 132
 133         priv = GET_PRIV (data);
 134
 135         if (xevent->type == PropertyNotify) {
 136                 atom = gdk_x11_get_xatom_by_name ("_NET_CURRENT_DESKTOP");
 137                 if (xevent->xproperty.atom == atom) {
 138                         if (priv->popup) {
 139                                 gtk_widget_destroy (priv->popup);
 140                                 priv->popup = NULL;
 141                         }
 142                 }
 143         }
 144
 145         return GDK_FILTER_CONTINUE;
 146 }
 147
 148 static void
 149 avatar_image_add_filter (EmpathyAvatarImage *avatar_image)
 150 {
 151         Window     window;
 152         GdkWindow *gdkwindow;
 153         gint       mask;
 154
 155         mask = PropertyChangeMask;
 156
 157         window = GDK_ROOT_WINDOW ();
 158         gdkwindow = gdk_xid_table_lookup (window);
 159
 160         gdk_error_trap_push ();
 161         if (gdkwindow) {
 162                 XWindowAttributes attrs;
 163                 XGetWindowAttributes (gdk_display, window, &attrs);
 164                 mask |= attrs.your_event_mask;
 165         }
 166
 167         XSelectInput (gdk_display, window, mask);
 168
 169         gdk_error_trap_pop ();
 170
 171         gdk_window_add_filter (NULL, avatar_image_filter_func, avatar_image);
 172 }
 173
 174 static void
 175 avatar_image_remove_filter (EmpathyAvatarImage *avatar_image)
 176 {
 177         gdk_window_remove_filter (NULL, avatar_image_filter_func, avatar_image);
 178 }
 179
 180 static gboolean
 181 avatar_image_button_press_event (GtkWidget *widget, GdkEventButton *event)
 182 {
 183         EmpathyAvatarImagePriv *priv;
 184         GtkWidget             *popup;
 185         GtkWidget             *frame;
 186         GtkWidget             *image;
 187         gint                   x, y;
 188         gint                   popup_width, popup_height;
 189         gint                   width, height;
 190         GdkPixbuf             *pixbuf;
 191         GtkAllocation          allocation;
 192
 193         priv = GET_PRIV (widget);
 194
 195         if (priv->popup) {
 196                 gtk_widget_destroy (priv->popup);
 197                 priv->popup = NULL;
 198         }
 199
 200         if (event->button != 1 || event->type != GDK_BUTTON_PRESS || !priv->pixbuf) {
 201                 return FALSE;
 202         }
 203
 204         popup_width = gdk_pixbuf_get_width (priv->pixbuf);
 205         popup_height = gdk_pixbuf_get_height (priv->pixbuf);
 206
 207         gtk_widget_get_allocation (priv->image, &allocation);
 208         width = allocation.width;
 209         height = allocation.height;
 210
 211         /* Don't show a popup if the popup is smaller then the currently avatar
 212          * image.
 213          */
 214         if (popup_height <= height && popup_width <= width) {
 215                 return TRUE;
 216         }
 217
 218         pixbuf = empathy_pixbuf_scale_down_if_necessary (priv->pixbuf, MAX_LARGE);
 219         popup_width = gdk_pixbuf_get_width (pixbuf);
 220         popup_height = gdk_pixbuf_get_height (pixbuf);
 221
 222         popup = gtk_window_new (GTK_WINDOW_POPUP);
 223
 224         frame = gtk_frame_new (NULL);
 225         gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
 226
 227         gtk_container_add (GTK_CONTAINER (popup), frame);
 228
 229         image = gtk_image_new ();
 230         gtk_container_add (GTK_CONTAINER (frame), image);
 231
 232         gtk_image_set_from_pixbuf (GTK_IMAGE (image), pixbuf);
 233         g_object_unref (pixbuf);
 234
 235         gdk_window_get_origin (gtk_widget_get_window (priv->image), &x, &y);
 236
 237         x = x - (popup_width - width) / 2;
 238         y = y - (popup_height - height) / 2;
 239
 240         gtk_window_move (GTK_WINDOW (popup), x, y);
 241
 242         priv->popup = popup;
 243
 244         gtk_widget_show_all (popup);
 245
 246         return TRUE;
 247 }
 248
 249 static gboolean
 250 avatar_image_button_release_event (GtkWidget *widget, GdkEventButton *event)
 251 {
 252         EmpathyAvatarImagePriv *priv;
 253
 254         priv = GET_PRIV (widget);
 255
 256         if (event->button != 1 || event->type != GDK_BUTTON_RELEASE) {
 257                 return FALSE;
 258         }
 259
 260         if (!priv->popup) {
 261                 return TRUE;
 262         }
 263
 264         gtk_widget_destroy (priv->popup);
 265         priv->popup = NULL;
 266
 267         return TRUE;
 268 }
 269
 270 /**
 271  * empathy_avatar_image_new:
 272  *
 273  * Creates a new #EmpathyAvatarImage.
 274  *
 275  * Return value: a new #EmpathyAvatarImage
 276  */
 277 GtkWidget *
 278 empathy_avatar_image_new (void)
 279 {
 280         EmpathyAvatarImage *avatar_image;
 281
 282         avatar_image = g_object_new (EMPATHY_TYPE_AVATAR_IMAGE, NULL);
 283
 284         return GTK_WIDGET (avatar_image);
 285 }
 286
 287 /**
 288  * empathy_avatar_image_set:
 289  * @avatar_image: an #EmpathyAvatarImage
 290  * @avatar: the #EmpathyAvatar to set @avatar_image to
 291  *
 292  * Sets @avatar_image to display the avatar indicated by @avatar.
 293  */
 294 void
 295 empathy_avatar_image_set (EmpathyAvatarImage *avatar_image,
 296                           EmpathyAvatar      *avatar)
 297 {
 298         EmpathyAvatarImagePriv *priv = GET_PRIV (avatar_image);
 299         GdkPixbuf              *scaled_pixbuf;
 300
 301         g_return_if_fail (EMPATHY_IS_AVATAR_IMAGE (avatar_image));
 302
 303         if (priv->pixbuf) {
 304                 g_object_unref (priv->pixbuf);
 305                 priv->pixbuf = NULL;
 306         }
 307
 308         if (avatar) {
 309                 priv->pixbuf = empathy_pixbuf_from_data ((gchar *) avatar->data,
 310                                 avatar->len);
 311         }
 312
 313         if (!priv->pixbuf) {
 314                 gtk_image_clear (GTK_IMAGE (priv->image));
 315                 return;
 316         }
 317
 318         scaled_pixbuf = empathy_pixbuf_scale_down_if_necessary (priv->pixbuf, MAX_SMALL);
 319         gtk_image_set_from_pixbuf (GTK_IMAGE (priv->image), scaled_pixbuf);
 320
 321         if (scaled_pixbuf != priv->pixbuf) {
 322                 gtk_widget_set_tooltip_text (GTK_WIDGET (avatar_image),
 323                                              _("Click to enlarge"));
 324         } else {
 325                 gtk_widget_set_tooltip_text (GTK_WIDGET (avatar_image),
 326                                              NULL);
 327         }
 328
 329         g_object_unref (scaled_pixbuf);
 330 }
 331