git.maemo.org Git - modest/blob - src/widgets/modest-hbox-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-hbox-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 _ModestHBoxCellRendererPrivate ModestHBoxCellRendererPrivate;
  49
  50 struct _ModestHBoxCellRendererPrivate
  51 {
  52         GList *renderers_list;
  53 };
  54
  55 #define MODEST_HBOX_CELL_RENDERER_GET_PRIVATE(o)        \
  56         (G_TYPE_INSTANCE_GET_PRIVATE ((o), MODEST_TYPE_HBOX_CELL_RENDERER, ModestHBoxCellRendererPrivate))
  57
  58 /* static guint signals[LAST_SIGNAL] = {0}; */
  59
  60 /* static functions: GObject */
  61 static void modest_hbox_cell_renderer_instance_init (GTypeInstance *instance, gpointer g_class);
  62 static void modest_hbox_cell_renderer_finalize (GObject *object);
  63 static void modest_hbox_cell_renderer_class_init (ModestHBoxCellRendererClass *klass);
  64
  65 /* static functions: GtkCellRenderer */
  66 static void modest_hbox_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_hbox_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_hbox_cell_renderer_new:
  84  *
  85  * Return value: a new #ModestHBoxCellRenderer instance implemented for Gtk+
  86  **/
  87 GtkCellRenderer*
  88 modest_hbox_cell_renderer_new (void)
  89 {
  90         ModestHBoxCellRenderer *self = g_object_new (MODEST_TYPE_HBOX_CELL_RENDERER, NULL);
  91
  92         return GTK_CELL_RENDERER (self);
  93 }
  94
  95 static void
  96 modest_hbox_cell_renderer_instance_init (GTypeInstance *instance, gpointer g_class)
  97 {
  98         ModestHBoxCellRendererPrivate *priv = MODEST_HBOX_CELL_RENDERER_GET_PRIVATE (instance);
  99
 100         priv->renderers_list = NULL;
 101
 102         return;
 103 }
 104
 105 static void
 106 modest_hbox_cell_renderer_finalize (GObject *object)
 107 {
 108         ModestHBoxCellRendererPrivate *priv = MODEST_HBOX_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_hbox_cell_renderer_class_init (ModestHBoxCellRendererClass *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_hbox_cell_renderer_finalize;
 132         renderer_class->get_size = modest_hbox_cell_renderer_get_size;
 133         renderer_class->render = modest_hbox_cell_renderer_render;
 134
 135         g_type_class_add_private (object_class, sizeof (ModestHBoxCellRendererPrivate));
 136
 137         return;
 138 }
 139
 140 GType
 141 modest_hbox_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 (ModestHBoxCellRendererClass),
 150                   NULL,   /* base_init */
 151                   NULL,   /* base_finalize */
 152                   (GClassInitFunc) modest_hbox_cell_renderer_class_init,   /* class_init */
 153                   NULL,   /* class_finalize */
 154                   NULL,   /* class_data */
 155                   sizeof (ModestHBoxCellRenderer),
 156                   0,      /* n_preallocs */
 157                   modest_hbox_cell_renderer_instance_init    /* instance_init */
 158                 };
 159
 160                 type = g_type_register_static (GTK_TYPE_CELL_RENDERER,
 161                         "ModestHBoxCellRenderer",
 162                         &info, 0);
 163
 164         }
 165
 166         return type;
 167 }
 168
 169
 170 /**
 171  * modest_hbox_cell_renderer_append:
 172  * @hbox_renderer: a #ModestHBoxCellRenderer
 173  * @cell: a #GtkCellRenderer
 174  *
 175  * Appends @cell to the end of the list of renderers shown in @hbox_renderer
 176  */
 177 void
 178 modest_hbox_cell_renderer_append (ModestHBoxCellRenderer *hbox_renderer,
 179                                   GtkCellRenderer *cell,
 180                                   gboolean expand)
 181 {
 182         ModestHBoxCellRendererPrivate *priv = MODEST_HBOX_CELL_RENDERER_GET_PRIVATE (hbox_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         g_object_ref_sink (G_OBJECT (cell));
 187 }
 188
 189 static void
 190 modest_hbox_cell_renderer_get_size     (GtkCellRenderer       *cell,
 191                                         GtkWidget             *widget,
 192                                         GdkRectangle          *rectangle,
 193                                         gint                  *x_offset,
 194                                         gint                  *y_offset,
 195                                         gint                  *width,
 196                                         gint                  *height)
 197 {
 198         gint calc_width, calc_height;
 199         gint full_width, full_height;
 200         GList *node;
 201         ModestHBoxCellRendererPrivate *priv = MODEST_HBOX_CELL_RENDERER_GET_PRIVATE (cell);
 202
 203         calc_width = 0;
 204         calc_height = 0;
 205
 206         for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 207                 gint renderer_width, renderer_height;
 208                 GtkCellRenderer *renderer = (GtkCellRenderer *) node->data;
 209
 210                 gtk_cell_renderer_get_size (renderer, widget, NULL, NULL, NULL,
 211                                             &renderer_width, &renderer_height);
 212                 if ((renderer_width > 0)&&(renderer_height > 0)) {
 213                         calc_height = MAX (calc_height, renderer_height);
 214                         calc_width += renderer_width;
 215                 }
 216         }
 217
 218         full_width = (gint) cell->xpad * 2 + calc_width;
 219         full_height = (gint) cell->ypad * 2 + calc_height;
 220
 221         if (rectangle && calc_width > 0 && calc_height > 0) {
 222                 if (x_offset) {
 223                         *x_offset = (((gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ?
 224                                       (1.0 - cell->xalign) : cell->xalign) *
 225                                      (rectangle->width - full_width));
 226                         *x_offset = MAX (*x_offset, 0);
 227                 }
 228                 if (y_offset) {
 229                         *y_offset = ((cell->yalign) *
 230                                      (rectangle->height - full_height));
 231                         *y_offset = MAX (*y_offset, 0);
 232                 }
 233         } else {
 234                 if (x_offset)
 235                         *x_offset = 0;
 236                 if (y_offset)
 237                         *y_offset = 0;
 238         }
 239
 240         if (width)
 241                 *width = full_width;
 242         if (height)
 243                 *height = full_height;
 244 }
 245
 246 static void
 247 modest_hbox_cell_renderer_render       (GtkCellRenderer       *cell,
 248                                         GdkDrawable           *window,
 249                                         GtkWidget             *widget,
 250                                         GdkRectangle          *background_area,
 251                                         GdkRectangle          *cell_area,
 252                                         GdkRectangle          *expose_area,
 253                                         GtkCellRendererState  flags)
 254 {
 255         ModestHBoxCellRendererPrivate *priv = MODEST_HBOX_CELL_RENDERER_GET_PRIVATE (cell);
 256         gint nvis_children = 0;
 257         gint nexpand_children = 0;
 258         GtkTextDirection direction;
 259         GList *node = NULL;
 260         GtkCellRenderer *child;
 261         gint width, extra;
 262         GtkRequisition req;
 263
 264         direction = gtk_widget_get_direction (widget);
 265         nvis_children = 0;
 266         nexpand_children = 0;
 267
 268         /* first, retrieve the requisition of the children cell renderers */
 269         modest_hbox_cell_renderer_get_size (cell, widget, NULL, NULL, NULL, &(req.width), &(req.height));
 270
 271         /* Counts visible and expandable children cell renderers */
 272         for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 273                 gboolean visible, expand;
 274                 child = (GtkCellRenderer *) node->data;
 275                 g_object_get (G_OBJECT (child), "visible", &visible, NULL);
 276                 expand = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (child), RENDERER_EXPAND_ATTRIBUTE));
 277
 278                 if (visible) {
 279                         nvis_children += 1;
 280                         if (expand)
 281                                 nexpand_children += 1;
 282                 }
 283         }
 284
 285         if (nvis_children > 0) {
 286                 gint x_pad, y_pad;
 287                 gint x;
 288                 GdkRectangle child_alloc;
 289
 290                 if (nexpand_children > 0) {
 291                         width = cell_area->width - req.width;
 292                         extra = width / nexpand_children;
 293                 } else {
 294                         width = 0;
 295                         extra = 0;
 296                 }
 297
 298                 g_object_get (cell, "xpad", &x_pad, "ypad", &y_pad, NULL);
 299                 x = cell_area->x + x_pad;
 300                 child_alloc.y = cell_area->y + y_pad;
 301                 child_alloc.height = MAX (1, cell_area->height - y_pad * 2);
 302
 303                 for (node = priv->renderers_list; node != NULL; node = g_list_next (node)) {
 304                         gboolean visible, expand;
 305
 306                         child = (GtkCellRenderer *) node->data;
 307                         g_object_get (G_OBJECT (child), "visible", &visible, NULL);
 308                         expand = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (child), RENDERER_EXPAND_ATTRIBUTE));
 309
 310                         if (visible) {
 311                                 GtkRequisition child_req;
 312                                 gint child_xpad, child_ypad;
 313                                 GdkRectangle child_expose_area;
 314
 315                                 gtk_cell_renderer_get_size (child, widget, NULL, NULL, NULL, &(child_req.width), &(child_req.height));
 316                                 g_object_get (child, "xpad", &child_xpad, "ypad", &child_ypad, NULL);
 317
 318                                 if (expand) {
 319                                         if (nexpand_children == 1)
 320                                                 child_req.width += width;
 321                                         else
 322                                                 child_req.width += extra;
 323                                         nexpand_children -= 1;
 324                                         width -= extra;
 325                                 }
 326
 327                                 child_alloc.width = MAX (1, child_req.width);
 328                                 child_alloc.x = x;
 329
 330                                 if (direction == GTK_TEXT_DIR_RTL)
 331                                         child_alloc.x = cell_area->x + cell_area->width - (child_alloc.x - cell_area->x) - child_alloc.width;
 332
 333                                 if (gdk_rectangle_intersect (&child_alloc, expose_area, &child_expose_area))
 334                                         gtk_cell_renderer_render (child, window, widget, background_area, &child_alloc, &child_expose_area, flags);
 335                                 x += child_req.width;
 336                         }
 337                 }
 338         }
 339
 340 }