src/pattern.c

   1 /* vim: set sw=8: -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * pattern.c : Support and specifications for patterns.
   4  *
   5  * Author:
   6  *     Jody Goldberg <jody@gnome.org>
   7  *
   8  *  (C) 1999-2003 Jody Goldberg
   9  */
  10 #include <gnumeric-config.h>
  11 #include "gnumeric.h"
  12 #include "pattern.h"
  13
  14 #include "style-color.h"
  15
  16 #include <goffice/utils/go-pattern.h>
  17
  18 static const GOPatternType patterns[] = {
  19         GO_PATTERN_SOLID, /* dummy filler */
  20         GO_PATTERN_SOLID,
  21         GO_PATTERN_GREY75,
  22         GO_PATTERN_GREY50,
  23         GO_PATTERN_GREY25,
  24         GO_PATTERN_GREY125,
  25         GO_PATTERN_GREY625,
  26         GO_PATTERN_HORIZ,
  27         GO_PATTERN_VERT,
  28         GO_PATTERN_DIAG,
  29         GO_PATTERN_REV_DIAG,
  30         GO_PATTERN_DIAG_CROSS,
  31         GO_PATTERN_THICK_DIAG_CROSS,
  32         GO_PATTERN_THIN_HORIZ,
  33         GO_PATTERN_THIN_VERT,
  34         GO_PATTERN_THIN_REV_DIAG,
  35         GO_PATTERN_THIN_DIAG,
  36         GO_PATTERN_THIN_HORIZ_CROSS,
  37         GO_PATTERN_THIN_DIAG_CROSS,
  38         GO_PATTERN_SMALL_CIRCLES,
  39         GO_PATTERN_SEMI_CIRCLES,
  40         GO_PATTERN_THATCH,
  41         GO_PATTERN_LARGE_CIRCLES,
  42         GO_PATTERN_BRICKS,
  43         GO_PATTERN_FOREGROUND_SOLID
  44 };
  45
  46 /**
  47  * gnm_pattern_background_set:
  48  * @mstyle:
  49  * @cr:
  50  * @is_selected:
  51  * @ctxt:
  52  *
  53  * Returns: %TRUE if there is a background to paint.
  54  *
  55  * Set up a cairo context to paint the background of a cell.
  56  */
  57
  58 gboolean
  59 gnm_pattern_background_set (GnmStyle const *mstyle, cairo_t *cr,
  60                             gboolean const is_selected, GtkStyleContext *ctxt)
  61 {
  62         int pattern;
  63
  64         g_return_val_if_fail (!is_selected || ctxt != NULL, FALSE);
  65
  66         /*
  67          * Draw the background if the PATTERN is non 0
  68          * Draw a stipple too if the pattern is > 1
  69          */
  70         pattern = gnm_style_get_pattern (mstyle);
  71         if (pattern > 0 && pattern < GNM_PATTERNS_MAX) {
  72                 GOPattern gopat;
  73                 cairo_pattern_t *crpat;
  74                 gopat.pattern = patterns[pattern];
  75                 gopat.fore = gnm_style_get_pattern_color (mstyle)->go_color;
  76                 gopat.back = gnm_style_get_back_color (mstyle)->go_color;
  77                 if (is_selected) {
  78                         GOColor light;
  79                         GdkRGBA rgba;
  80                         gtk_style_context_get_background_color
  81                                 (ctxt, GTK_STATE_FLAG_SELECTED, &rgba);
  82                         light = GO_COLOR_FROM_GDK_RGBA (rgba);
  83                         gopat.fore = GO_COLOR_INTERPOLATE (light, gopat.fore, .5);
  84                         gopat.back = GO_COLOR_INTERPOLATE (light, gopat.back, .5);
  85                 }
  86                 crpat = go_pattern_create_cairo_pattern (&gopat, cr);
  87                 if (crpat)
  88                         cairo_set_source (cr, crpat);
  89                 cairo_pattern_destroy (crpat);
  90                 return TRUE;
  91         } else if (is_selected) {
  92                 GdkRGBA rgba;
  93                 GOColor color;
  94
  95                 gtk_style_context_get_background_color (ctxt, GTK_STATE_FLAG_SELECTED, &rgba);
  96                 color = GO_COLOR_FROM_GDK_RGBA (rgba);
  97                 /* Make a lighter version. */
  98                 color = GO_COLOR_INTERPOLATE (GO_COLOR_WHITE, color, .5);
  99                 cairo_set_source_rgba (cr, GO_COLOR_TO_CAIRO (color));
 100         }
 101         return FALSE;
 102 }