git.sur5r.net Git - glabels/blob - glabels2/src/color-swatch.c

   1 /*
   2  *  color-swatch.c
   3  *  Copyright (C) 2009  Jim Evins <evins@snaught.com>.
   4  *
   5  *  This file is part of gLabels.
   6  *
   7  *  gLabels is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  gLabels is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with gLabels.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22
  23 #include "color-swatch.h"
  24
  25 #include "marshal.h"
  26 #include "color.h"
  27
  28
  29 /*===========================================*/
  30 /* Private macros and constants.             */
  31 /*===========================================*/
  32
  33
  34 /*===========================================*/
  35 /* Private types                             */
  36 /*===========================================*/
  37
  38 struct _glColorSwatchPrivate {
  39
  40         guint      color;
  41
  42 };
  43
  44
  45 /*===========================================*/
  46 /* Private globals                           */
  47 /*===========================================*/
  48
  49
  50 /*===========================================*/
  51 /* Local function prototypes                 */
  52 /*===========================================*/
  53
  54 static void       gl_color_swatch_finalize    (GObject        *object);
  55
  56 static void       redraw                      (glColorSwatch  *this);
  57
  58 static gboolean   expose_event_cb             (GtkWidget      *widget,
  59                                                GdkEventExpose *event);
  60
  61 static void       draw_swatch                 (glColorSwatch  *this,
  62                                                cairo_t        *cr);
  63
  64
  65
  66 /****************************************************************************/
  67 /* Boilerplate Object stuff.                                                */
  68 /****************************************************************************/
  69 G_DEFINE_TYPE (glColorSwatch, gl_color_swatch, GTK_TYPE_DRAWING_AREA);
  70
  71
  72 /*****************************************************************************/
  73 /* Class Init Function.                                                      */
  74 /*****************************************************************************/
  75 static void
  76 gl_color_swatch_class_init (glColorSwatchClass *class)
  77 {
  78         GObjectClass   *gobject_class = G_OBJECT_CLASS (class);
  79         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  80
  81         gl_color_swatch_parent_class = g_type_class_peek_parent (class);
  82
  83         gobject_class->finalize    = gl_color_swatch_finalize;
  84
  85         widget_class->expose_event = expose_event_cb;
  86 }
  87
  88
  89 /*****************************************************************************/
  90 /* Object Instance Init Function.                                            */
  91 /*****************************************************************************/
  92 static void
  93 gl_color_swatch_init (glColorSwatch *this)
  94 {
  95         GTK_WIDGET_SET_FLAGS (GTK_WIDGET (this), GTK_NO_WINDOW);
  96
  97         this->priv = g_new0 (glColorSwatchPrivate, 1);
  98 }
  99
 100
 101 /*****************************************************************************/
 102 /* Finalize Method.                                                          */
 103 /*****************************************************************************/
 104 static void
 105 gl_color_swatch_finalize (GObject *object)
 106 {
 107         glColorSwatch *this = GL_COLOR_SWATCH (object);
 108
 109         g_return_if_fail (object != NULL);
 110         g_return_if_fail (GL_IS_COLOR_SWATCH (object));
 111
 112         g_free (this->priv);
 113
 114         G_OBJECT_CLASS (gl_color_swatch_parent_class)->finalize (object);
 115 }
 116
 117
 118 /*****************************************************************************/
 119 /** New Object Generator.                                                    */
 120 /*****************************************************************************/
 121 GtkWidget *
 122 gl_color_swatch_new (gint         w,
 123                      gint         h,
 124                      guint        color)
 125 {
 126         glColorSwatch *this;
 127
 128         this = g_object_new (GL_TYPE_COLOR_SWATCH, NULL);
 129
 130         this->priv->color = color;
 131
 132         gtk_widget_set_size_request (GTK_WIDGET (this), w, h);
 133
 134         return GTK_WIDGET (this);
 135 }
 136
 137
 138 /*****************************************************************************/
 139 /* Set color.                                                                */
 140 /*****************************************************************************/
 141 void
 142 gl_color_swatch_set_color (glColorSwatch *this,
 143                            guint          color)
 144 {
 145         this->priv->color = color;
 146
 147         redraw (this);
 148 }
 149
 150
 151 /*****************************************************************************/
 152 /* Request redraw.                                                           */
 153 /*****************************************************************************/
 154 static void
 155 redraw (glColorSwatch  *this)
 156 {
 157         GdkRegion *region;
 158
 159         if (GTK_WIDGET_REALIZED (GTK_WIDGET (this)))
 160         {
 161                 /* redraw the cairo canvas forcing an expose event */
 162                 region = gdk_drawable_get_clip_region (GTK_WIDGET (this)->window);
 163                 gdk_window_invalidate_region (GTK_WIDGET (this)->window, region, TRUE);
 164                 gdk_region_destroy (region);
 165         }
 166 }
 167
 168
 169 /*****************************************************************************/
 170 /* "Expose event" callback.                                                  */
 171 /*****************************************************************************/
 172 static gboolean
 173 expose_event_cb (GtkWidget      *widget,
 174                  GdkEventExpose *event)
 175 {
 176         cairo_t *cr;
 177
 178         cr = gdk_cairo_create (widget->window);
 179
 180         cairo_rectangle (cr,
 181                         event->area.x, event->area.y,
 182                         event->area.width, event->area.height);
 183         cairo_clip (cr);
 184
 185         cairo_translate (cr, widget->allocation.x, widget->allocation.y);
 186
 187         draw_swatch (GL_COLOR_SWATCH (widget), cr);
 188
 189         cairo_destroy (cr);
 190
 191         return FALSE;
 192 }
 193
 194
 195 /*****************************************************************************/
 196 /* Draw swatch.                                                              */
 197 /*****************************************************************************/
 198 static void
 199 draw_swatch (glColorSwatch *this,
 200              cairo_t       *cr)
 201 {
 202         GdkPixbuf *pixbuf;
 203         GtkStyle  *style;
 204         gdouble    w, h;
 205         guint      fill_color, line_color;
 206
 207
 208         cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
 209
 210
 211         w = GTK_WIDGET (this)->allocation.width;
 212         h = GTK_WIDGET (this)->allocation.height;
 213
 214
 215         style = gtk_widget_get_style (GTK_WIDGET (this));
 216         if ( GTK_WIDGET_IS_SENSITIVE (GTK_WIDGET (this)) )
 217         {
 218                 fill_color = this->priv->color;
 219                 line_color = gl_color_from_gdk_color (&style->fg[GTK_STATE_NORMAL]);
 220         }
 221         else
 222         {
 223                 fill_color = GL_COLOR_NONE;
 224                 line_color = gl_color_from_gdk_color (&style->fg[GTK_STATE_INSENSITIVE]);
 225         }
 226
 227         cairo_rectangle( cr, 0, 0, w-1, h-1 );
 228
 229         cairo_set_source_rgba (cr, GL_COLOR_RGBA_ARGS (fill_color));
 230         cairo_fill_preserve( cr );
 231
 232         cairo_set_source_rgb (cr, GL_COLOR_RGB_ARGS (line_color));
 233         cairo_set_line_width (cr, 1.0);
 234         cairo_stroke (cr);
 235 }
 236
 237
 238
 239 /*
 240  * Local Variables:       -- emacs
 241  * mode: C                -- emacs
 242  * c-basic-offset: 8      -- emacs
 243  * tab-width: 8           -- emacs
 244  * indent-tabs-mode: nil  -- emacs
 245  * End:                   -- emacs
 246  */