git.maemo.org Git - modest/blob - src/widgets/modest-vbox-cell-renderer.c

   1 /* Copyright (c) 2007, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <config.h>
  31
  32 #include <glib/gi18n-lib.h>
  33
  34 #include <gtk/gtkwidget.h>
  35
  36 #include <modest-text-utils.h>
  37 #include <modest-vbox-cell-renderer.h>
  38
  39 #define RENDERER_EXPAND_ATTRIBUTE "box-expand"
  40
  41 static GObjectClass *parent_class = NULL;
  42
  43 /* /\* signals *\/ */
  44 /* enum { */
  45 /*      LAST_SIGNAL */
  46 /* }; */
  47
  48 typedef struct _ModestVBoxCellRendererPrivate ModestVBoxCellRendererPrivate;
  49
  50 struct _ModestVBoxCellRendererPrivate
  51 {
  52         GList *renderers_list;
  53 };
  54
  55 #define MODEST_VBOX_CELL_RENDERER_GET_PRIVATE(o)        \
  56         (G_TYPE_INSTANCE_GET_PRIVATE ((o), MODEST_TYPE_VBOX_CELL_RENDERER, ModestVBoxCellRendererPrivate))
  57
  58 /* static guint signals[LAST_SIGNAL] = {0}; */
  59
  60 /* static functions: GObject */
  61 static void modest_vbox_cell_renderer_instance_init (GTypeInstance *instance, gpointer g_class);
  62 static void modest_vbox_cell_renderer_finalize (GObject *object);
  63 static void modest_vbox_cell_renderer_class_init (ModestVBoxCellRendererClass *klass);
  64
  65 /* static functions: GtkCellRenderer */
  66 static void modest_vbox_cell_renderer_get_size     (GtkCellRenderer       *cell,
  67                                                     GtkWidget             *widget,
  68                                                     GdkRectangle          *rectangle,
  69                                                     gint                  *x_offset,
  70                                                     gint                  *y_offset,
  71                                                     gint                  *width,
  72                                                     gint                  *height);
  73 static void modest_vbox_cell_renderer_render       (GtkCellRenderer       *cell,
  74                                                     GdkDrawable           *window,
  75                                                     GtkWidget             *widget,
  76                                                     GdkRectangle          *background_area,
  77                                                     GdkRectangle          *cell_area,
  78                                                     GdkRectangle          *expose_area,
  79                                                     GtkCellRendererState  flags);
  80
  81
  82 /**
  83  * modest_vbox_cell_renderer_new:
  84  *
  85  * Return value: a new #ModestVBoxCellRenderer instance implemented for Gtk+
  86  **/
  87 GtkCellRenderer*
  88 modest_vbox_cell_renderer_new (void)
  89 {
  90         ModestVBoxCellRenderer *self = g_object_new (MODEST_TYPE_VBOX_CELL_RENDERER, NULL);
  91
  92         return GTK_CELL_RENDERER (self);
  93 }
  94
  95 static void
  96 modest_vbox_cell_renderer_instance_init (GTypeInstance *instance, gpointer g_class)
  97 {
  98         ModestVBoxCellRendererPrivate *priv = MODEST_VBOX_CELL_RENDERER_GET_PRIVATE (instance);
  99
 100         priv->renderers_list = NULL;
 101
 102         return;
 103 }
 104
 105 static void
 106 modest_vbox_cell_renderer_finalize (GObject *object)
 107 {
 108         ModestVBoxCellRendererPrivate *priv = MODEST_VBOX_CELL_RENDERER_GET_PRIVATE (object);
 109
 110         if (priv->renderers_list != NULL) {
 111                 g_list_foreach (priv->renderers_list, (GFunc) g_object_unref, NULL);
 112                 g_list_free (priv->renderers_list);
 113                 priv->renderers_list = NULL;
 114         }
 115
 116         (*parent_class->finalize) (object);
 117
 118         return;
 119 }
 120
 121 static void
 122 modest_vbox_cell_renderer_class_init (ModestVBoxCellRendererClass *klass)
 123 {
 124         GObjectClass *object_class;
 125         GtkCellRendererClass *renderer_class;
 126
 127         parent_class = g_type_class_peek_parent (klass);
 128         object_class = (GObjectClass*) klass;
 129         renderer_class = (GtkCellRendererClass*) klass;
 130
 131         object_class->finalize = modest_vbox_cell_renderer_finalize;
 132         renderer_class->get_size = modest_vbox_cell_renderer_get_size;
 133         renderer_class->render = modest_vbox_cell_renderer_render;
 134
 135         g_type_class_add_private (object_class, sizeof (ModestVBoxCellRendererPrivate));
 136
 137         return;
 138 }
 139
 140 GType
 141 modest_vbox_cell_renderer_get_type (void)
 142 {
 143         static GType type = 0;
 144
 145         if (G_UNLIKELY(type == 0))
 146         {
 147                 static const GTypeInfo info =
 148                 {
 149                   sizeof (ModestVBoxCellRendererClass),
 150                   NULL,   /* base_init */
 151                   NULL,   /* base_finalize */
 152                   (GClassInitFunc) modest_vbox_cell_renderer_class_init,   /* class_init */
 153                   NULL,   /* class_finalize */
 154                   NULL,   /* class_data */
 155                   sizeof (ModestVBoxCellRenderer),
 156                   0,      /* n_preallocs */
 157                   modest_vbox_cell_renderer_instance_init    /* instance_init */
 158                 };
 159
 160                 type = g_type_register_static (GTK_TYPE_CELL_RENDERER,
 161                         "ModestVBoxCellRenderer",
 162                         &info, 0);
 163
 164         }
 165
 166         return type;
 167 }
 168
 169
 170 /**
 171  * modest_vbox_cell_renderer_append:
 172  * @vbox_renderer: a #ModestVBoxCellRenderer
 173  * @cell: a #GtkCellRenderer
 174  *
 175  * Appends @cell to the end of the list of renderers shown in @vbox_renderer
 176  */
 177 void
 178 modest_vbox_cell_renderer_append (ModestVBoxCellRenderer *vbox_renderer,
 179                                   GtkCellRenderer *cell,
 180                                   gboolean expand)
 181 {
 182         ModestVBoxCellRendererPrivate *priv = MODEST_VBOX_CELL_RENDERER_GET_PRIVATE (vbox_renderer);
 183
 184         priv->renderers_list = g_list_append (priv->renderers_list, cell);
 185         g_object_set_data (G_OBJECT (cell), RENDERER_EXPAND_ATTRIBUTE, GINT_TO_POINTER (expand));
 186
 187 #if GLIB_CHECK_VERSION(2, 10, 0) /* g_object_ref_sink() was added in glib 2.10: */
 188         g_object_ref_sink (G_OBJECT (cell));
 189 #else
 190         g_object_ref (G_OBJECT (cell));
 191         gtk_object_sink (GTK_OBJECT (cell));
 192 #endif
 193 }
 194
 195 static void
 196 modest_vbox_cell_renderer_get_size     (GtkCellRenderer       *cell,
 197                                         GtkWidget             *widget,
 198                                         GdkRectangle          *rectangle,
 199                                         gint                  *x_offset,
 200                                         gint                  *y_offset,
 201                                         gint                  *width,
 202                                         gint                  *height)
 203 {
 204         gint calc_width, calc_height;
 205         gint full_width, full_height;
 206         GList *node;
 207         ModestVBoxCellRendererPrivate *priv = MODEST_VBOX_CELL_RENDERER_GET_PRIVATE (cell);
 208
 209         calc_width = 0;
 210         calc_height = 0;
 211
 212         for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 213                 gint renderer_width, renderer_height;
 214                 GtkCellRenderer *renderer = (GtkCellRenderer *) node->data;
 215
 216                 gtk_cell_renderer_get_size (renderer, widget, NULL, NULL, NULL,
 217                                             &renderer_width, &renderer_height);
 218                 if ((renderer_width > 0)&&(renderer_height > 0)) {
 219                         calc_width = MAX (calc_width, renderer_width);
 220                         calc_height += renderer_height;
 221                 }
 222         }
 223
 224         full_width = (gint) cell->xpad * 2 + calc_width;
 225         full_height = (gint) cell->ypad * 2 + calc_height;
 226
 227         if (rectangle && calc_width > 0 && calc_height > 0) {
 228                 if (x_offset) {
 229                         *x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
 230                                       (1.0 - cell->xalign) : cell->xalign) *
 231                                      (rectangle->width - full_width));
 232                         *x_offset = MAX (*x_offset, 0);
 233                 }
 234                 if (y_offset) {
 235                         *y_offset = ((cell->yalign) *
 236                                      (rectangle->height - full_height));
 237                         *y_offset = MAX (*y_offset, 0);
 238                 }
 239         } else {
 240                 if (x_offset)
 241                         *x_offset = 0;
 242                 if (y_offset)
 243                         *y_offset = 0;
 244         }
 245
 246         if (width)
 247                 *width = full_width;
 248         if (height)
 249                 *height = full_height;
 250 }
 251
 252 static void
 253 modest_vbox_cell_renderer_render       (GtkCellRenderer       *cell,
 254                                         GdkDrawable           *window,
 255                                         GtkWidget             *widget,
 256                                         GdkRectangle          *background_area,
 257                                         GdkRectangle          *cell_area,
 258                                         GdkRectangle          *expose_area,
 259                                         GtkCellRendererState  flags)
 260 {
 261         ModestVBoxCellRendererPrivate *priv = MODEST_VBOX_CELL_RENDERER_GET_PRIVATE (cell);
 262         gint nvis_children = 0;
 263         gint nexpand_children = 0;
 264         GtkTextDirection direction;
 265         GList *node = NULL;
 266         GtkCellRenderer *child;
 267         gint height, extra;
 268         GtkRequisition req;
 269
 270         direction = gtk_widget_get_direction (widget);
 271         nvis_children = 0;
 272         nexpand_children = 0;
 273
 274         /* first, retrieve the requisition of the children cell renderers */
 275         modest_vbox_cell_renderer_get_size (cell, widget, NULL, NULL, NULL, &(req.width), &(req.height));
 276
 277         /* Counts visible and expandable children cell renderers */
 278         for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 279                 gboolean visible, expand;
 280                 child = (GtkCellRenderer *) node->data;
 281                 g_object_get (G_OBJECT (child), "visible", &visible, NULL);
 282                 expand = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (child), RENDERER_EXPAND_ATTRIBUTE));
 283
 284                 if (visible) {
 285                         nvis_children += 1;
 286                         if (expand)
 287                                 nexpand_children += 1;
 288                 }
 289         }
 290
 291         if (nvis_children > 0) {
 292                 gint x_pad, y_pad;
 293                 gint y;
 294                 GdkRectangle child_alloc;
 295
 296                 if (nexpand_children > 0) {
 297                         height = cell_area->height - req.height;
 298                         extra = height / nexpand_children;
 299                 } else {
 300                         height = 0;
 301                         extra = 0;
 302                 }
 303
 304                 g_object_get (cell, "xpad", &x_pad, "ypad", &y_pad, NULL);
 305                 y = cell_area->y + y_pad;
 306                 child_alloc.x = cell_area->x + x_pad;
 307                 child_alloc.width = MAX (1, cell_area->width - x_pad * 2);
 308
 309                 for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 310                         gboolean visible, expand;
 311
 312                         child = (GtkCellRenderer *) node->data;
 313                         g_object_get (G_OBJECT (child), "visible", &visible, NULL);
 314                         expand = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (child), RENDERER_EXPAND_ATTRIBUTE));
 315
 316                         if (visible) {
 317                                 GtkRequisition child_req;
 318                                 gint child_xpad, child_ypad;
 319                                 GdkRectangle child_expose_area;
 320
 321                                 gtk_cell_renderer_get_size (child, widget, NULL, NULL, NULL, &(child_req.width), &(child_req.height));
 322                                 g_object_get (child, "xpad", &child_xpad, "ypad", &child_ypad, NULL);
 323
 324                                 if (expand) {
 325                                         if (nexpand_children == 1)
 326                                                 child_req.height += height;
 327                                         else
 328                                                 child_req.height += extra;
 329                                         nexpand_children -= 1;
 330                                         height -= extra;
 331                                 }
 332
 333                                 child_alloc.height = MAX (1, child_req.height);
 334                                 child_alloc.y = y;
 335
 336                                 if (gdk_rectangle_intersect (&child_alloc, expose_area, &child_expose_area))
 337                                         gtk_cell_renderer_render (child, window, widget, background_area, &child_alloc, &child_expose_area, flags);
 338                                 y += child_req.height;
 339                         }
 340                 }
 341         }
 342
 343 }