Pileus Git - ~andy/gtk/blob - tests/testtextview.c

   1
   2
   3 #include "config.h"
   4 #include <gtk/gtk.h>
   5
   6
   7 static void
   8 create_tags (GtkTextBuffer *buffer)
   9 {
  10
  11   gtk_text_buffer_create_tag (buffer, "italic",
  12                               "style", PANGO_STYLE_ITALIC, NULL);
  13
  14   gtk_text_buffer_create_tag (buffer, "bold",
  15                               "weight", PANGO_WEIGHT_BOLD, NULL);
  16
  17   gtk_text_buffer_create_tag (buffer, "x-large",
  18                               "scale", PANGO_SCALE_X_LARGE, NULL);
  19
  20   gtk_text_buffer_create_tag (buffer, "semi_blue_foreground",
  21                               "foreground", "rgba(0,0,255,0.5)", NULL);
  22
  23   gtk_text_buffer_create_tag (buffer, "semi_red_background",
  24                               "background", "rgba(255,0,0,0.5)", NULL);
  25
  26   gtk_text_buffer_create_tag (buffer, "semi_orange_paragraph_background",
  27                               "paragraph-background", "rgba(255,165,0,0.5)", NULL);
  28
  29   gtk_text_buffer_create_tag (buffer, "word_wrap",
  30                               "wrap_mode", GTK_WRAP_WORD, NULL);
  31 }
  32
  33
  34 static void
  35 insert_text (GtkTextBuffer *buffer)
  36 {
  37   GtkTextIter  iter;
  38   GtkTextIter  start, end;
  39   GtkTextMark *para_start;
  40
  41   /* get start of buffer; each insertion will revalidate the
  42    * iterator to point to just after the inserted text.
  43    */
  44   gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
  45
  46   gtk_text_buffer_insert (buffer, &iter,
  47       "This test shows text view rendering some text with rgba colors.\n\n", -1);
  48
  49   gtk_text_buffer_insert (buffer, &iter, "For example, you can have ", -1);
  50   gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
  51                                             "italic translucent blue text", -1,
  52                                             "italic",
  53                                             "semi_blue_foreground",
  54                                             "x-large",
  55                                             NULL);
  56
  57   gtk_text_buffer_insert (buffer, &iter, ", or ", -1);
  58
  59   gtk_text_buffer_insert (buffer, &iter, ", ", -1);
  60   gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
  61                                             "bold text with translucent red background", -1,
  62                                             "bold",
  63                                             "semi_red_background",
  64                                             "x-large",
  65                                             NULL);
  66   gtk_text_buffer_insert (buffer, &iter, ".\n\n", -1);
  67
  68   /* Store the beginning of the other paragraph */
  69   para_start = gtk_text_buffer_create_mark (buffer, "para_start", &iter, TRUE);
  70
  71   gtk_text_buffer_insert (buffer, &iter,
  72       "Paragraph background colors can also be set with rgba color values .\n", -1);
  73
  74   gtk_text_buffer_insert (buffer, &iter, "For instance, you can have ", -1);
  75   gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
  76                                             "bold translucent blue text", -1,
  77                                             "bold",
  78                                             "semi_blue_foreground",
  79                                             "x-large",
  80                                             NULL);
  81
  82   gtk_text_buffer_insert (buffer, &iter, ", or ", -1);
  83
  84   gtk_text_buffer_insert (buffer, &iter, ", ", -1);
  85   gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
  86                                             "italic text with translucent red background", -1,
  87                                             "italic",
  88                                             "semi_red_background",
  89                                             "x-large",
  90                                             NULL);
  91
  92   gtk_text_buffer_insert (buffer, &iter, " all rendered onto a translucent orange paragraph background.\n", -1);
  93
  94   gtk_text_buffer_get_bounds (buffer, &start, &end);
  95
  96   gtk_text_buffer_get_iter_at_mark (buffer, &iter, para_start);
  97   gtk_text_buffer_apply_tag_by_name (buffer, "semi_orange_paragraph_background", &iter, &end);
  98
  99   /* Apply word_wrap tag to whole buffer */
 100   gtk_text_buffer_get_bounds (buffer, &start, &end);
 101   gtk_text_buffer_apply_tag_by_name (buffer, "word_wrap", &start, &end);
 102 }
 103
 104 static void
 105 draw_background (GtkWidget *widget, cairo_t *cr)
 106 {
 107   GtkAllocation allocation;
 108   cairo_pattern_t *pat;
 109
 110   gtk_widget_get_allocation (widget, &allocation);
 111
 112   cairo_save (cr);
 113
 114   pat = cairo_pattern_create_linear (0.0, 0.0,  allocation.width, allocation.height);
 115   cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 0, 1);
 116   cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1);
 117   cairo_rectangle (cr, 0, 0, allocation.width, allocation.height);
 118   cairo_set_source (cr, pat);
 119   cairo_fill (cr);
 120   cairo_pattern_destroy (pat);
 121
 122   cairo_restore (cr);
 123 }
 124
 125 int
 126 main (int argc, char **argv)
 127 {
 128   GtkWidget *window, *textview;
 129   GtkTextBuffer *buffer;
 130
 131   gtk_init (&argc, &argv);
 132
 133   window   = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 134   textview = gtk_text_view_new ();
 135   buffer   = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textview));
 136
 137   gtk_window_set_default_size (GTK_WINDOW (window), 400, -1);
 138
 139   create_tags (buffer);
 140   insert_text (buffer);
 141
 142   gtk_widget_show (textview);
 143   gtk_container_add (GTK_CONTAINER (window), textview);
 144
 145   g_signal_connect (textview, "draw",
 146                     G_CALLBACK (draw_background), NULL);
 147
 148
 149   gtk_widget_show (window);
 150
 151   gtk_main ();
 152
 153   return 0;
 154 }