src/widgets/gnm-cell-renderer-toggle.c

   1 /* gnm-cell-renderer-toggle.c
   2  *
   3  * Author:
   4  *        Andreas J. Guelzow <aguelzow@taliesin.ca>
   5  *
   6  * Copyright (C) 2002  Andreas J. Guelzow <aguelzow@taliesin.ca>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <gnumeric-config.h>
  23 #include <widgets/gnm-cell-renderer-toggle.h>
  24 #include <gsf/gsf-impl-utils.h>
  25 #include <gnm-i18n.h>
  26
  27 static void gnumeric_cell_renderer_toggle_get_property  (GObject         *object,
  28                                                          guint            param_id,
  29                                                          GValue          *value,
  30                                                          GParamSpec      *pspec);
  31 static void gnumeric_cell_renderer_toggle_set_property  (GObject         *object,
  32                                                          guint            param_id,
  33                                                          const GValue    *value,
  34                                                          GParamSpec      *pspec);
  35
  36 static void gnumeric_cell_renderer_toggle_get_size   (GtkCellRenderer            *cell,
  37                                                       GtkWidget                  *widget,
  38                                                       GdkRectangle const         *cell_area,
  39                                                       gint                       *x_offset,
  40                                                       gint                       *y_offset,
  41                                                       gint                       *width,
  42                                                       gint                       *height);
  43
  44 static void gnumeric_cell_renderer_toggle_render (GtkCellRenderer *cell,
  45                                                   cairo_t         *cr,
  46                                                   GtkWidget       *widget,
  47                                                   GdkRectangle const *background_area,
  48                                                   GdkRectangle const  *cell_area,
  49                                                   GtkCellRendererState flags);
  50
  51 static void gnumeric_cell_renderer_toggle_class_init
  52                                       (GnmCellRendererToggleClass *cell_toggle_class);
  53
  54 static GtkCellRendererToggleClass *parent_class = NULL;
  55
  56 enum {
  57         PROP_ZERO,
  58         PROP_PIXBUF
  59 };
  60
  61 GType
  62 gnm_cell_renderer_toggle_get_type (void)
  63 {
  64         static GType cell_toggle_type = 0;
  65
  66         if (!cell_toggle_type)
  67         {
  68                 static const GTypeInfo cell_toggle_info =
  69                         {
  70                                 sizeof (GnmCellRendererToggleClass),
  71                                 NULL,           /* base_init */
  72                                 NULL,           /* base_finalize */
  73                                 (GClassInitFunc)gnumeric_cell_renderer_toggle_class_init,
  74                                 NULL,           /* class_finalize */
  75                                 NULL,           /* class_data */
  76                                 sizeof (GnmCellRendererToggle),
  77                                 0,              /* n_preallocs */
  78                                 (GInstanceInitFunc) NULL,
  79                         };
  80
  81                 cell_toggle_type = g_type_register_static (GTK_TYPE_CELL_RENDERER_TOGGLE,
  82                                                            "GnmCellRendererToggle",
  83                                                            &cell_toggle_info, 0);
  84         }
  85
  86         return cell_toggle_type;
  87 }
  88
  89 static void
  90 gnumeric_cell_renderer_toggle_dispose (GObject *obj)
  91 {
  92         GnmCellRendererToggle *celltoggle = GNM_CELL_RENDERER_TOGGLE (obj);
  93         g_clear_object (&celltoggle->pixbuf);
  94         G_OBJECT_CLASS (parent_class)->dispose (obj);
  95 }
  96
  97 static void
  98 gnumeric_cell_renderer_toggle_class_init (GnmCellRendererToggleClass *class)
  99 {
 100         GtkCellRendererClass *cell_class = GTK_CELL_RENDERER_CLASS  (class);
 101         GObjectClass *object_class = G_OBJECT_CLASS (class);
 102
 103         parent_class = g_type_class_peek_parent (object_class);
 104
 105         object_class->get_property = gnumeric_cell_renderer_toggle_get_property;
 106         object_class->set_property = gnumeric_cell_renderer_toggle_set_property;
 107         object_class->dispose = gnumeric_cell_renderer_toggle_dispose;
 108
 109         cell_class->render = gnumeric_cell_renderer_toggle_render;
 110         cell_class->get_size = gnumeric_cell_renderer_toggle_get_size;
 111
 112         g_object_class_install_property
 113                 (object_class, PROP_PIXBUF,
 114                  g_param_spec_object ("pixbuf",
 115                                       P_("Pixbuf Object"),
 116                                       P_("The pixbuf to render."),
 117                                       GDK_TYPE_PIXBUF,
 118                                       GSF_PARAM_STATIC | G_PARAM_READWRITE));
 119 }
 120
 121
 122 GtkCellRenderer *
 123 gnm_cell_renderer_toggle_new (void)
 124 {
 125         return GTK_CELL_RENDERER (g_object_new (GNM_CELL_RENDERER_TOGGLE_TYPE, NULL));
 126 }
 127
 128 static void
 129 gnumeric_cell_renderer_toggle_get_property (GObject     *object,
 130                                             guint        param_id,
 131                                             GValue      *value,
 132                                             GParamSpec  *pspec)
 133 {
 134         GnmCellRendererToggle *celltoggle = GNM_CELL_RENDERER_TOGGLE (object);
 135
 136         switch (param_id) {
 137         case PROP_PIXBUF:
 138                 g_value_set_object (value, celltoggle->pixbuf);
 139                 break;
 140         default:
 141                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 142                 break;
 143         }
 144 }
 145
 146
 147 static void
 148 gnumeric_cell_renderer_toggle_set_property (GObject      *object,
 149                                             guint         param_id,
 150                                             const GValue *value,
 151                                             GParamSpec   *pspec)
 152 {
 153         GnmCellRendererToggle *celltoggle = GNM_CELL_RENDERER_TOGGLE (object);
 154         GdkPixbuf *pixbuf;
 155
 156         switch (param_id) {
 157         case PROP_PIXBUF:
 158                 pixbuf = (GdkPixbuf*) g_value_get_object (value);
 159                 if (pixbuf)
 160                         g_object_ref (pixbuf);
 161                 if (celltoggle->pixbuf)
 162                         g_object_unref (celltoggle->pixbuf);
 163                 celltoggle->pixbuf = pixbuf;
 164                 break;
 165         default:
 166                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 167                 break;
 168         }
 169 }
 170
 171 static void
 172 gnumeric_cell_renderer_toggle_get_size (GtkCellRenderer *cell,
 173                                         G_GNUC_UNUSED GtkWidget *widget,
 174                                         GdkRectangle const *cell_area,
 175                                         gint            *x_offset,
 176                                         gint            *y_offset,
 177                                         gint            *width,
 178                                         gint            *height)
 179 {
 180         GnmCellRendererToggle *cellpixbuf = (GnmCellRendererToggle *) cell;
 181         gint pixbuf_width = 0;
 182         gint pixbuf_height = 0;
 183         gint calc_width;
 184         gint calc_height;
 185         int xpad, ypad;
 186         gfloat xalign, yalign;
 187
 188         if (cellpixbuf->pixbuf)
 189         {
 190                 pixbuf_width = gdk_pixbuf_get_width (cellpixbuf->pixbuf);
 191                 pixbuf_height = gdk_pixbuf_get_height (cellpixbuf->pixbuf);
 192         }
 193
 194         gtk_cell_renderer_get_padding (GTK_CELL_RENDERER (cellpixbuf),
 195                                        &xpad, &ypad);
 196         gtk_cell_renderer_get_alignment (GTK_CELL_RENDERER (cellpixbuf),
 197                                          &xalign, &yalign);
 198         calc_width = xpad * 2 + pixbuf_width;
 199         calc_height = ypad * 2 + pixbuf_height;
 200
 201         if (x_offset) *x_offset = 0;
 202         if (y_offset) *y_offset = 0;
 203
 204         if (cell_area && pixbuf_width > 0 && pixbuf_height > 0)
 205         {
 206                 if (x_offset)
 207                 {
 208                         *x_offset = xalign * (cell_area->width - calc_width -
 209                                               (2 * xpad));
 210                         *x_offset = MAX (*x_offset, 0) + xpad;
 211                 }
 212                 if (y_offset)
 213                 {
 214                         *y_offset = yalign * (cell_area->height - calc_height -
 215                                               (2 * ypad));
 216                         *y_offset = MAX (*y_offset, 0) + ypad;
 217                 }
 218         }
 219
 220         if (calc_width)
 221                 *width = calc_width;
 222
 223         if (height)
 224                 *height = calc_height;
 225
 226 }
 227
 228 static void
 229 gnumeric_cell_renderer_toggle_render (GtkCellRenderer *cell,
 230                                       cairo_t         *cr,
 231                                       GtkWidget       *widget,
 232                                       G_GNUC_UNUSED GdkRectangle const *background_area,
 233                                       GdkRectangle const *cell_area,
 234                                       G_GNUC_UNUSED GtkCellRendererState flags)
 235 {
 236         GnmCellRendererToggle *cellpixbuf = (GnmCellRendererToggle *) cell;
 237         GdkPixbuf *pixbuf;
 238         GdkRectangle pix_rect;
 239         GdkRectangle draw_rect;
 240         int xpad, ypad;
 241
 242         pixbuf = cellpixbuf->pixbuf;
 243
 244         if (!pixbuf)
 245                 return;
 246
 247         gnumeric_cell_renderer_toggle_get_size (cell, widget, cell_area,
 248                                                 &pix_rect.x,
 249                                                 &pix_rect.y,
 250                                                 &pix_rect.width,
 251                                                 &pix_rect.height);
 252
 253         gtk_cell_renderer_get_padding (cell, &xpad, &ypad);
 254
 255         pix_rect.x += cell_area->x;
 256         pix_rect.y += cell_area->y;
 257         pix_rect.width -= xpad * 2;
 258         pix_rect.height -= ypad * 2;
 259
 260         if (gdk_rectangle_intersect (cell_area, &pix_rect, &draw_rect)) {
 261                 gdk_cairo_set_source_pixbuf (cr, pixbuf,
 262                                  draw_rect.x, draw_rect.y);
 263                 cairo_rectangle (cr, draw_rect.x, draw_rect.y, draw_rect.width, draw_rect.height);
 264                 cairo_fill (cr);
 265         }
 266 }