libempathy-gtk/empathy-cell-renderer-expander.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) 2007-2011 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: Kristian Rietveld <kris@imendio.com>
  22  */
  23
  24 #include <gtk/gtk.h>
  25
  26 #include <libempathy/empathy-utils.h>
  27 #include "empathy-cell-renderer-expander.h"
  28
  29 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyCellRendererExpander)
  30 typedef struct {
  31         GtkExpanderStyle     expander_style;
  32         gint                 expander_size;
  33
  34         guint                activatable : 1;
  35 } EmpathyCellRendererExpanderPriv;
  36
  37 enum {
  38         PROP_0,
  39         PROP_EXPANDER_STYLE,
  40         PROP_EXPANDER_SIZE,
  41         PROP_ACTIVATABLE
  42 };
  43
  44 static void     empathy_cell_renderer_expander_get_property (GObject                         *object,
  45                                                             guint                            param_id,
  46                                                             GValue                          *value,
  47                                                             GParamSpec                      *pspec);
  48 static void     empathy_cell_renderer_expander_set_property (GObject                         *object,
  49                                                             guint                            param_id,
  50                                                             const GValue                    *value,
  51                                                             GParamSpec                      *pspec);
  52 static void     empathy_cell_renderer_expander_finalize     (GObject                         *object);
  53 static void     empathy_cell_renderer_expander_get_size     (GtkCellRenderer                 *cell,
  54                                                             GtkWidget                       *widget,
  55                                                             const GdkRectangle              *cell_area,
  56                                                             gint                            *x_offset,
  57                                                             gint                            *y_offset,
  58                                                             gint                            *width,
  59                                                             gint                            *height);
  60 static void     empathy_cell_renderer_expander_render       (GtkCellRenderer                 *cell,
  61                                                             cairo_t *cr,
  62                                                             GtkWidget                       *widget,
  63                                                             const GdkRectangle              *background_area,
  64                                                             const GdkRectangle              *cell_area,
  65                                                             GtkCellRendererState             flags);
  66 static gboolean empathy_cell_renderer_expander_activate     (GtkCellRenderer                 *cell,
  67                                                             GdkEvent                        *event,
  68                                                             GtkWidget                       *widget,
  69                                                             const gchar                     *path,
  70                                                             const GdkRectangle              *background_area,
  71                                                             const GdkRectangle              *cell_area,
  72                                                             GtkCellRendererState             flags);
  73
  74 G_DEFINE_TYPE (EmpathyCellRendererExpander, empathy_cell_renderer_expander, GTK_TYPE_CELL_RENDERER)
  75
  76 static void
  77 empathy_cell_renderer_expander_init (EmpathyCellRendererExpander *expander)
  78 {
  79         EmpathyCellRendererExpanderPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (expander,
  80                 EMPATHY_TYPE_CELL_RENDERER_EXPANDER, EmpathyCellRendererExpanderPriv);
  81
  82         expander->priv = priv;
  83         priv->expander_style = GTK_EXPANDER_COLLAPSED;
  84         priv->expander_size = 12;
  85         priv->activatable = TRUE;
  86
  87         g_object_set (expander,
  88                       "xpad", 2,
  89                       "ypad", 2,
  90                       "mode", GTK_CELL_RENDERER_MODE_ACTIVATABLE,
  91                       NULL);
  92 }
  93
  94 static void
  95 empathy_cell_renderer_expander_class_init (EmpathyCellRendererExpanderClass *klass)
  96 {
  97         GObjectClass         *object_class;
  98         GtkCellRendererClass *cell_class;
  99
 100         object_class  = G_OBJECT_CLASS (klass);
 101         cell_class = GTK_CELL_RENDERER_CLASS (klass);
 102
 103         object_class->finalize = empathy_cell_renderer_expander_finalize;
 104
 105         object_class->get_property = empathy_cell_renderer_expander_get_property;
 106         object_class->set_property = empathy_cell_renderer_expander_set_property;
 107
 108         cell_class->get_size = empathy_cell_renderer_expander_get_size;
 109         cell_class->render = empathy_cell_renderer_expander_render;
 110         cell_class->activate = empathy_cell_renderer_expander_activate;
 111
 112         g_object_class_install_property (object_class,
 113                                          PROP_EXPANDER_STYLE,
 114                                          g_param_spec_enum ("expander-style",
 115                                                             "Expander Style",
 116                                                             "Style to use when painting the expander",
 117                                                             GTK_TYPE_EXPANDER_STYLE,
 118                                                             GTK_EXPANDER_COLLAPSED,
 119                                                             G_PARAM_READWRITE));
 120
 121         g_object_class_install_property (object_class,
 122                                          PROP_EXPANDER_SIZE,
 123                                          g_param_spec_int ("expander-size",
 124                                                            "Expander Size",
 125                                                            "The size of the expander",
 126                                                            0,
 127                                                            G_MAXINT,
 128                                                            12,
 129                                                            G_PARAM_READWRITE));
 130
 131         g_object_class_install_property (object_class,
 132                                          PROP_ACTIVATABLE,
 133                                          g_param_spec_boolean ("activatable",
 134                                                                "Activatable",
 135                                                                "The expander can be activated",
 136                                                                TRUE,
 137                                                                G_PARAM_READWRITE));
 138
 139         g_type_class_add_private (object_class, sizeof (EmpathyCellRendererExpanderPriv));
 140 }
 141
 142 static void
 143 empathy_cell_renderer_expander_get_property (GObject    *object,
 144                                             guint       param_id,
 145                                             GValue     *value,
 146                                             GParamSpec *pspec)
 147 {
 148         EmpathyCellRendererExpander     *expander;
 149         EmpathyCellRendererExpanderPriv *priv;
 150
 151         expander = EMPATHY_CELL_RENDERER_EXPANDER (object);
 152         priv = GET_PRIV (expander);
 153
 154         switch (param_id) {
 155         case PROP_EXPANDER_STYLE:
 156                 g_value_set_enum (value, priv->expander_style);
 157                 break;
 158
 159         case PROP_EXPANDER_SIZE:
 160                 g_value_set_int (value, priv->expander_size);
 161                 break;
 162
 163         case PROP_ACTIVATABLE:
 164                 g_value_set_boolean (value, priv->activatable);
 165                 break;
 166
 167         default:
 168                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 169                 break;
 170         }
 171 }
 172
 173 static void
 174 empathy_cell_renderer_expander_set_property (GObject      *object,
 175                                             guint         param_id,
 176                                             const GValue *value,
 177                                             GParamSpec   *pspec)
 178 {
 179         EmpathyCellRendererExpander     *expander;
 180         EmpathyCellRendererExpanderPriv *priv;
 181
 182         expander = EMPATHY_CELL_RENDERER_EXPANDER (object);
 183         priv = GET_PRIV (expander);
 184
 185         switch (param_id) {
 186         case PROP_EXPANDER_STYLE:
 187                 priv->expander_style = g_value_get_enum (value);
 188                 break;
 189
 190         case PROP_EXPANDER_SIZE:
 191                 priv->expander_size = g_value_get_int (value);
 192                 break;
 193
 194         case PROP_ACTIVATABLE:
 195                 priv->activatable = g_value_get_boolean (value);
 196                 break;
 197
 198         default:
 199                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 200                 break;
 201         }
 202 }
 203
 204 static void
 205 empathy_cell_renderer_expander_finalize (GObject *object)
 206 {
 207         EmpathyCellRendererExpanderPriv *priv;
 208
 209         priv = GET_PRIV (object);
 210
 211         (* G_OBJECT_CLASS (empathy_cell_renderer_expander_parent_class)->finalize) (object);
 212 }
 213
 214 GtkCellRenderer *
 215 empathy_cell_renderer_expander_new (void)
 216 {
 217         return g_object_new (EMPATHY_TYPE_CELL_RENDERER_EXPANDER, NULL);
 218 }
 219
 220 static void
 221 empathy_cell_renderer_expander_get_size (GtkCellRenderer    *cell,
 222                                         GtkWidget          *widget,
 223                                         const GdkRectangle *cell_area,
 224                                         gint               *x_offset,
 225                                         gint               *y_offset,
 226                                         gint               *width,
 227                                         gint               *height)
 228 {
 229         EmpathyCellRendererExpander     *expander;
 230         EmpathyCellRendererExpanderPriv *priv;
 231         gfloat xalign, yalign;
 232         guint xpad, ypad;
 233
 234         expander = (EmpathyCellRendererExpander *) cell;
 235         priv = GET_PRIV (expander);
 236
 237         g_object_get (cell,
 238                       "xalign", &xalign,
 239                       "yalign", &yalign,
 240                       "xpad", &xpad,
 241                       "ypad", &ypad,
 242                       NULL);
 243
 244         if (cell_area) {
 245                 if (x_offset) {
 246                         *x_offset = xalign * (cell_area->width - (priv->expander_size + (2 * xpad)));
 247                         *x_offset = MAX (*x_offset, 0);
 248                 }
 249
 250                 if (y_offset) {
 251                         *y_offset = yalign * (cell_area->height - (priv->expander_size + (2 * ypad)));
 252                         *y_offset = MAX (*y_offset, 0);
 253                 }
 254         } else {
 255                 if (x_offset)
 256                         *x_offset = 0;
 257
 258                 if (y_offset)
 259                         *y_offset = 0;
 260         }
 261
 262         if (width)
 263                 *width = xpad * 2 + priv->expander_size;
 264
 265         if (height)
 266                 *height = ypad * 2 + priv->expander_size;
 267 }
 268
 269 static void
 270 empathy_cell_renderer_expander_render (GtkCellRenderer      *cell,
 271                                       cairo_t *cr,
 272                                       GtkWidget            *widget,
 273                                       const GdkRectangle   *background_area,
 274                                       const GdkRectangle   *cell_area,
 275                                       GtkCellRendererState  flags)
 276 {
 277         EmpathyCellRendererExpander     *expander;
 278         EmpathyCellRendererExpanderPriv *priv;
 279         gint                            x_offset, y_offset;
 280         guint                           xpad, ypad;
 281         GtkStyleContext                 *style;
 282
 283         expander = (EmpathyCellRendererExpander *) cell;
 284         priv = GET_PRIV (expander);
 285
 286         empathy_cell_renderer_expander_get_size (cell, widget,
 287                                                 (GdkRectangle *) cell_area,
 288                                                 &x_offset, &y_offset,
 289                                                 NULL, NULL);
 290
 291         g_object_get (cell,
 292                       "xpad", &xpad,
 293                       "ypad", &ypad,
 294                       NULL);
 295
 296         style = gtk_widget_get_style_context (widget);
 297
 298         gtk_style_context_save (style);
 299
 300         if (priv->expander_style == GTK_EXPANDER_COLLAPSED)
 301                 gtk_style_context_set_state (style, GTK_STATE_NORMAL);
 302         else
 303                 gtk_style_context_set_state (style, GTK_STATE_ACTIVE);
 304
 305         gtk_render_expander (style,
 306                              cr,
 307                              cell_area->x + x_offset + xpad,
 308                              cell_area->y + y_offset + ypad,
 309                              priv->expander_size,
 310                              priv->expander_size);
 311
 312         gtk_style_context_restore (style);
 313 }
 314
 315 static gboolean
 316 empathy_cell_renderer_expander_activate (GtkCellRenderer      *cell,
 317                                         GdkEvent             *event,
 318                                         GtkWidget            *widget,
 319                                         const gchar          *path_string,
 320                                         const GdkRectangle   *background_area,
 321                                         const GdkRectangle   *cell_area,
 322                                         GtkCellRendererState  flags)
 323 {
 324         EmpathyCellRendererExpander     *expander;
 325         EmpathyCellRendererExpanderPriv *priv;
 326         GtkTreePath                    *path;
 327
 328         expander = EMPATHY_CELL_RENDERER_EXPANDER (cell);
 329         priv = GET_PRIV (cell);
 330
 331         if (!GTK_IS_TREE_VIEW (widget) || !priv->activatable)
 332                 return FALSE;
 333
 334         path = gtk_tree_path_new_from_string (path_string);
 335
 336         if (gtk_tree_path_get_depth (path) > 1) {
 337                 gtk_tree_path_free (path);
 338                 return TRUE;
 339         }
 340
 341         if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), path)) {
 342                 gtk_tree_view_collapse_row (GTK_TREE_VIEW (widget), path);
 343         } else {
 344                 gtk_tree_view_expand_row (GTK_TREE_VIEW (widget), path, FALSE);
 345         }
 346
 347         gtk_tree_path_free (path);
 348
 349         return TRUE;
 350 }