libview/ev-loading-window.c

   1 /* ev-loading-window.c
   2  *  this file is part of evince, a gnome document viewer
   3  *
   4  * Copyright (C) 2010 Carlos Garcia Campos <carlosgc@gnome.org>
   5  *
   6  * Evince is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Evince is distributed in the hope that it will be useful, but
  12  * 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 License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <string.h>
  24 #include <glib/gi18n.h>
  25 #include "ev-loading-window.h"
  26
  27 enum {
  28         PROP_0,
  29         PROP_PARENT
  30 };
  31
  32 struct _EvLoadingWindow {
  33         GtkWindow  base_instance;
  34
  35         GtkWindow *parent;
  36         GtkWidget *spinner;
  37
  38         gint       x;
  39         gint       y;
  40         gint       width;
  41         gint       height;
  42 };
  43
  44 struct _EvLoadingWindowClass {
  45         GtkWindowClass base_class;
  46 };
  47
  48 G_DEFINE_TYPE (EvLoadingWindow, ev_loading_window, GTK_TYPE_WINDOW)
  49
  50 static void
  51 ev_loading_window_set_property (GObject      *object,
  52                                 guint         prop_id,
  53                                 const GValue *value,
  54                                 GParamSpec   *pspec)
  55 {
  56         EvLoadingWindow *window = EV_LOADING_WINDOW (object);
  57
  58         switch (prop_id) {
  59         case PROP_PARENT:
  60                 window->parent = g_value_get_object (value);
  61                 break;
  62         default:
  63                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  64         }
  65 }
  66
  67 static void
  68 ev_loading_window_init (EvLoadingWindow *window)
  69 {
  70         GtkWindow   *gtk_window = GTK_WINDOW (window);
  71         GtkWidget   *widget = GTK_WIDGET (window);
  72         GtkWidget   *hbox;
  73         GtkWidget   *label;
  74         GtkStyleContext *context;
  75         GdkRGBA    fg, bg;
  76         const gchar *loading_text = _("Loading…");
  77         const gchar *fg_color_name = "info_fg_color";
  78         const gchar *bg_color_name = "info_bg_color";
  79
  80         hbox = gtk_hbox_new (FALSE, 12);
  81
  82         window->spinner = gtk_spinner_new ();
  83         gtk_box_pack_start (GTK_BOX (hbox), window->spinner, FALSE, FALSE, 0);
  84         gtk_widget_show (window->spinner);
  85
  86         label = gtk_label_new (loading_text);
  87         gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
  88         gtk_widget_show (label);
  89
  90         gtk_container_add (GTK_CONTAINER (window), hbox);
  91         gtk_widget_show (hbox);
  92
  93         gtk_widget_set_app_paintable (widget, TRUE);
  94
  95         gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  96
  97         gtk_window_set_type_hint (gtk_window, GDK_WINDOW_TYPE_HINT_NOTIFICATION);
  98         gtk_window_set_accept_focus (gtk_window, FALSE);
  99         gtk_window_set_decorated (gtk_window, FALSE);
 100         gtk_window_set_resizable (gtk_window, FALSE);
 101
 102         context = gtk_widget_get_style_context (widget);
 103         if (!gtk_style_context_lookup_color (context, fg_color_name, &fg) ||
 104             !gtk_style_context_lookup_color (context, bg_color_name, &bg)) {
 105                 fg.red = 0.7;
 106                 fg.green = 0.67;
 107                 fg.blue = 0.63;
 108                 fg.alpha = 1.0;
 109
 110                 bg.red = 0.99;
 111                 bg.green = 0.99;
 112                 bg.blue = 0.71;
 113                 bg.alpha = 1.0;
 114         }
 115
 116         gtk_widget_override_background_color (widget, GTK_STATE_NORMAL, &bg);
 117         gtk_widget_override_color (widget, GTK_STATE_NORMAL, &fg);
 118 }
 119
 120 static GObject *
 121 ev_loading_window_constructor (GType                  type,
 122                                guint                  n_construct_properties,
 123                                GObjectConstructParam *construct_params)
 124 {
 125         GObject         *object;
 126         EvLoadingWindow *window;
 127         GtkWindow       *gtk_window;
 128
 129         object = G_OBJECT_CLASS (ev_loading_window_parent_class)->constructor (type,
 130                                                                                n_construct_properties,
 131                                                                                construct_params);
 132         window = EV_LOADING_WINDOW (object);
 133         gtk_window = GTK_WINDOW (window);
 134
 135         gtk_window_set_transient_for (gtk_window, window->parent);
 136         gtk_window_set_destroy_with_parent (gtk_window, TRUE);
 137
 138         return object;
 139 }
 140
 141 static void
 142 _cairo_rounded_rectangle (cairo_t *cr,
 143                           gint     width,
 144                           gint     height,
 145                           gdouble  radius)
 146 {
 147         cairo_move_to (cr, radius, 0);
 148         cairo_line_to (cr, width - radius, 0);
 149         cairo_curve_to (cr,
 150                         width, 0,
 151                         width, 0,
 152                         width,
 153                         radius);
 154         cairo_line_to (cr, width, height - radius);
 155         cairo_curve_to (cr,
 156                         width,height,
 157                         width, height,
 158                         width - radius,
 159                         height);
 160         cairo_line_to (cr, radius, height);
 161         cairo_curve_to (cr,
 162                         0, height,
 163                         0, height,
 164                         0, height - radius);
 165         cairo_line_to (cr, 0, radius);
 166         cairo_curve_to (cr,
 167                         0, 0,
 168                         0, 0,
 169                         radius, 0);
 170 }
 171
 172 static void
 173 ev_loading_window_size_allocate (GtkWidget      *widget,
 174                                  GtkAllocation  *allocation)
 175 {
 176         EvLoadingWindow *window = EV_LOADING_WINDOW (widget);
 177         cairo_surface_t *surface;
 178         cairo_region_t  *shape;
 179         cairo_t         *cr;
 180         double           r;
 181
 182         GTK_WIDGET_CLASS (ev_loading_window_parent_class)->size_allocate (widget, allocation);
 183
 184         if (allocation->width == window->width && allocation->height == window->height)
 185                 return;
 186
 187         window->width = allocation->width;
 188         window->height = allocation->height;
 189
 190         surface = cairo_image_surface_create (CAIRO_FORMAT_A8,
 191                                               window->width,
 192                                               window->height);
 193         cr = cairo_create (surface);
 194
 195         cairo_save (cr);
 196         cairo_rectangle (cr, 0, 0, window->width, window->height);
 197         cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
 198         cairo_fill (cr);
 199         cairo_restore (cr);
 200
 201         cairo_set_source_rgb (cr, 1., 1., 1.);
 202         r = MIN (window->width, window->height) / 2.;
 203         _cairo_rounded_rectangle (cr, window->width, window->height, r);
 204         cairo_fill (cr);
 205
 206         cairo_destroy (cr);
 207
 208         shape = gdk_cairo_region_create_from_surface (surface);
 209         cairo_surface_destroy (surface);
 210
 211         gtk_widget_shape_combine_region (widget, shape);
 212         cairo_region_destroy (shape);
 213 }
 214
 215 static void
 216 ev_loading_window_hide (GtkWidget *widget)
 217 {
 218         EvLoadingWindow *window = EV_LOADING_WINDOW (widget);
 219
 220         window->x = window->y = 0;
 221
 222         gtk_spinner_stop (GTK_SPINNER (window->spinner));
 223
 224         GTK_WIDGET_CLASS (ev_loading_window_parent_class)->hide (widget);
 225 }
 226
 227 static void
 228 ev_loading_window_show (GtkWidget *widget)
 229 {
 230         EvLoadingWindow *window = EV_LOADING_WINDOW (widget);
 231
 232         gtk_spinner_start (GTK_SPINNER (window->spinner));
 233
 234         GTK_WIDGET_CLASS (ev_loading_window_parent_class)->show (widget);
 235 }
 236
 237 static void
 238 ev_loading_window_class_init (EvLoadingWindowClass *klass)
 239 {
 240         GObjectClass   *g_object_class = G_OBJECT_CLASS (klass);
 241         GtkWidgetClass *gtk_widget_class = GTK_WIDGET_CLASS (klass);
 242
 243         g_object_class->constructor = ev_loading_window_constructor;
 244         g_object_class->set_property = ev_loading_window_set_property;
 245
 246         gtk_widget_class->size_allocate = ev_loading_window_size_allocate;
 247         gtk_widget_class->show = ev_loading_window_show;
 248         gtk_widget_class->hide = ev_loading_window_hide;
 249
 250         g_object_class_install_property (g_object_class,
 251                                          PROP_PARENT,
 252                                          g_param_spec_object ("parent",
 253                                                               "Parent",
 254                                                               "The parent window",
 255                                                               GTK_TYPE_WINDOW,
 256                                                               G_PARAM_WRITABLE |
 257                                                               G_PARAM_CONSTRUCT_ONLY));
 258 }
 259
 260 /* Public methods */
 261 GtkWidget *
 262 ev_loading_window_new (GtkWindow *parent)
 263 {
 264         GtkWidget *window;
 265
 266         g_return_val_if_fail (GTK_IS_WINDOW (parent), NULL);
 267
 268         window = g_object_new (EV_TYPE_LOADING_WINDOW,
 269                                "type", GTK_WINDOW_POPUP,
 270                                "parent", parent,
 271                                NULL);
 272         return window;
 273 }
 274
 275 void
 276 ev_loading_window_get_size (EvLoadingWindow *window,
 277                             gint            *width,
 278                             gint            *height)
 279 {
 280         if (width) *width = window->width;
 281         if (height) *height = window->height;
 282 }
 283
 284 void
 285 ev_loading_window_move (EvLoadingWindow *window,
 286                         gint             x,
 287                         gint             y)
 288 {
 289         if (x == window->x && y == window->y)
 290                 return;
 291
 292         window->x = x;
 293         window->y = y;
 294         gtk_window_move (GTK_WINDOW (window), x, y);
 295 }