/* Text Widget/Multiple Views * * The GtkTextView widget displays a GtkTextBuffer. One GtkTextBuffer * can be displayed by multiple GtkTextViews. This demo has two views * displaying a single buffer, and shows off the widget's text * formatting features. * */ #include #include /* for exit() */ static void easter_egg_callback (GtkWidget *button, gpointer data); static void create_tags (GtkTextBuffer *buffer) { /* Create a bunch of tags. Note that it's also possible to * create tags with gtk_text_tag_new() then add them to the * tag table for the buffer, gtk_text_buffer_create_tag() is * just a convenience function. Also note that you don't have * to give tags a name; pass NULL for the name to create an * anonymous tag. * * In any real app, another useful optimization would be to create * a GtkTextTagTable in advance, and reuse the same tag table for * all the buffers with the same tag set, instead of creating * new copies of the same tags for every buffer. * * Tags are assigned default priorities in order of addition to the * tag table. That is, tags created later that affect the same text * property affected by an earlier tag will override the earlier * tag. You can modify tag priorities with * gtk_text_tag_set_priority(). */ gtk_text_buffer_create_tag (buffer, "heading", "weight", PANGO_WEIGHT_BOLD, "size", 15 * PANGO_SCALE, NULL); gtk_text_buffer_create_tag (buffer, "italic", "style", PANGO_STYLE_ITALIC, NULL); gtk_text_buffer_create_tag (buffer, "bold", "weight", PANGO_WEIGHT_BOLD, NULL); gtk_text_buffer_create_tag (buffer, "big", /* points times the PANGO_SCALE factor */ "size", 20 * PANGO_SCALE, NULL); gtk_text_buffer_create_tag (buffer, "xx-small", "scale", PANGO_SCALE_XX_SMALL, NULL); gtk_text_buffer_create_tag (buffer, "x-large", "scale", PANGO_SCALE_X_LARGE, NULL); gtk_text_buffer_create_tag (buffer, "monospace", "family", "monospace", NULL); gtk_text_buffer_create_tag (buffer, "blue_foreground", "foreground", "blue", NULL); gtk_text_buffer_create_tag (buffer, "red_background", "background", "red", NULL); gtk_text_buffer_create_tag (buffer, "big_gap_before_line", "pixels_above_lines", 30, NULL); gtk_text_buffer_create_tag (buffer, "big_gap_after_line", "pixels_below_lines", 30, NULL); gtk_text_buffer_create_tag (buffer, "double_spaced_line", "pixels_inside_wrap", 10, NULL); gtk_text_buffer_create_tag (buffer, "not_editable", "editable", FALSE, NULL); gtk_text_buffer_create_tag (buffer, "word_wrap", "wrap_mode", GTK_WRAP_WORD, NULL); gtk_text_buffer_create_tag (buffer, "char_wrap", "wrap_mode", GTK_WRAP_CHAR, NULL); gtk_text_buffer_create_tag (buffer, "no_wrap", "wrap_mode", GTK_WRAP_NONE, NULL); gtk_text_buffer_create_tag (buffer, "center", "justification", GTK_JUSTIFY_CENTER, NULL); gtk_text_buffer_create_tag (buffer, "right_justify", "justification", GTK_JUSTIFY_RIGHT, NULL); gtk_text_buffer_create_tag (buffer, "wide_margins", "left_margin", 50, "right_margin", 50, NULL); gtk_text_buffer_create_tag (buffer, "strikethrough", "strikethrough", TRUE, NULL); gtk_text_buffer_create_tag (buffer, "underline", "underline", PANGO_UNDERLINE_SINGLE, NULL); gtk_text_buffer_create_tag (buffer, "double_underline", "underline", PANGO_UNDERLINE_DOUBLE, NULL); gtk_text_buffer_create_tag (buffer, "superscript", "rise", 10 * PANGO_SCALE, /* 10 pixels */ "size", 8 * PANGO_SCALE, /* 8 points */ NULL); gtk_text_buffer_create_tag (buffer, "subscript", "rise", -10 * PANGO_SCALE, /* 10 pixels */ "size", 8 * PANGO_SCALE, /* 8 points */ NULL); gtk_text_buffer_create_tag (buffer, "rtl_quote", "wrap_mode", GTK_WRAP_WORD, "direction", GTK_TEXT_DIR_RTL, "indent", 30, "left_margin", 20, "right_margin", 20, NULL); } static void insert_text (GtkTextBuffer *buffer) { GtkTextIter iter; GtkTextIter start, end; GdkPixbuf *pixbuf; GdkPixbuf *scaled; pixbuf = gdk_pixbuf_new_from_resource ("/textview/gtk-logo-rgb.gif", NULL); g_assert (pixbuf); scaled = gdk_pixbuf_scale_simple (pixbuf, 32, 32, GDK_INTERP_BILINEAR); g_object_unref (pixbuf); pixbuf = scaled; /* get start of buffer; each insertion will revalidate the * iterator to point to just after the inserted text. */ gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0); gtk_text_buffer_insert (buffer, &iter, "The text widget can display text with all kinds of nifty attributes. " "It also supports multiple views of the same buffer; this demo is " "showing the same buffer in two places.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Font styles. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "For example, you can have ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "italic", -1, "italic", NULL); gtk_text_buffer_insert (buffer, &iter, ", ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "bold", -1, "bold", NULL); gtk_text_buffer_insert (buffer, &iter, ", or ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "monospace (typewriter)", -1, "monospace", NULL); gtk_text_buffer_insert (buffer, &iter, ", or ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "big", -1, "big", NULL); gtk_text_buffer_insert (buffer, &iter, " text. ", -1); gtk_text_buffer_insert (buffer, &iter, "It's best not to hardcode specific text sizes; you can use relative " "sizes as with CSS, such as ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "xx-small", -1, "xx-small", NULL); gtk_text_buffer_insert (buffer, &iter, " or ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "x-large", -1, "x-large", NULL); gtk_text_buffer_insert (buffer, &iter, " to ensure that your program properly adapts if the user changes the " "default font size.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Colors. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "Colors such as ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "a blue foreground", -1, "blue_foreground", NULL); gtk_text_buffer_insert (buffer, &iter, " or ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "a red background", -1, "red_background", NULL); gtk_text_buffer_insert (buffer, &iter, " or even ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "a blue foreground on red background", -1, "blue_foreground", "red_background", NULL); gtk_text_buffer_insert (buffer, &iter, " (select that to read it) can be used.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Underline, strikethrough, and rise. ", -1, "heading", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Strikethrough", -1, "strikethrough", NULL); gtk_text_buffer_insert (buffer, &iter, ", ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "underline", -1, "underline", NULL); gtk_text_buffer_insert (buffer, &iter, ", ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "double underline", -1, "double_underline", NULL); gtk_text_buffer_insert (buffer, &iter, ", ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "superscript", -1, "superscript", NULL); gtk_text_buffer_insert (buffer, &iter, ", and ", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "subscript", -1, "subscript", NULL); gtk_text_buffer_insert (buffer, &iter, " are all supported.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Images. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "The buffer can have images in it: ", -1); gtk_text_buffer_insert_pixbuf (buffer, &iter, pixbuf); gtk_text_buffer_insert_pixbuf (buffer, &iter, pixbuf); gtk_text_buffer_insert_pixbuf (buffer, &iter, pixbuf); gtk_text_buffer_insert (buffer, &iter, " for example.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Spacing. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "You can adjust the amount of space before each line.\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "This line has a whole lot of space before it.\n", -1, "big_gap_before_line", "wide_margins", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "You can also adjust the amount of space after each line; " "this line has a whole lot of space after it.\n", -1, "big_gap_after_line", "wide_margins", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "You can also adjust the amount of space between wrapped lines; " "this line has extra space between each wrapped line in the same " "paragraph. To show off wrapping, some filler text: the quick " "brown fox jumped over the lazy dog. Blah blah blah blah blah " "blah blah blah blah.\n", -1, "double_spaced_line", "wide_margins", NULL); gtk_text_buffer_insert (buffer, &iter, "Also note that those lines have extra-wide margins.\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Editability. ", -1, "heading", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "This line is 'locked down' and can't be edited by the user - just " "try it! You can't delete this line.\n\n", -1, "not_editable", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Wrapping. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "This line (and most of the others in this buffer) is word-wrapped, " "using the proper Unicode algorithm. Word wrap should work in all " "scripts and languages that GTK+ supports. Let's make this a long " "paragraph to demonstrate: blah blah blah blah blah blah blah blah " "blah blah blah blah blah blah blah blah blah blah blah\n\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "This line has character-based wrapping, and can wrap between any two " "character glyphs. Let's make this a long paragraph to demonstrate: " "blah blah blah blah blah blah blah blah blah blah blah blah blah blah " "blah blah blah blah blah\n\n", -1, "char_wrap", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "This line has all wrapping turned off, so it makes the horizontal " "scrollbar appear.\n\n\n", -1, "no_wrap", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Justification. ", -1, "heading", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "\nThis line has center justification.\n", -1, "center", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "This line has right justification.\n", -1, "right_justify", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "\nThis line has big wide margins. Text text text text text text text " "text text text text text text text text text text text text text text " "text text text text text text text text text text text text text text " "text.\n", -1, "wide_margins", NULL); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "Internationalization. ", -1, "heading", NULL); gtk_text_buffer_insert (buffer, &iter, "You can put all sorts of Unicode text in the buffer.\n\nGerman " "(Deutsch S\303\274d) Gr\303\274\303\237 Gott\nGreek " "(\316\225\316\273\316\273\316\267\316\275\316\271\316\272\316\254) " "\316\223\316\265\316\271\316\254 \317\203\316\261\317\202\nHebrew " "\327\251\327\234\327\225\327\235\nJapanese " "(\346\227\245\346\234\254\350\252\236)\n\nThe widget properly handles " "bidirectional text, word wrapping, DOS/UNIX/Unicode paragraph separators, " "grapheme boundaries, and so on using the Pango internationalization " "framework.\n", -1); gtk_text_buffer_insert (buffer, &iter, "Here's a word-wrapped quote in a right-to-left language:\n", -1); gtk_text_buffer_insert_with_tags_by_name (buffer, &iter, "\331\210\331\202\330\257 \330\250\330\257\330\243 " "\330\253\331\204\330\247\330\253 \331\205\331\206 " "\330\243\331\203\330\253\330\261 \330\247\331\204\331\205\330\244\330\263\330\263\330\247\330\252 " "\330\252\331\202\330\257\331\205\330\247 \331\201\331\212 " "\330\264\330\250\331\203\330\251 \330\247\331\203\330\263\331\212\331\210\331\206 " "\330\250\330\261\330\247\331\205\330\254\331\207\330\247 " "\331\203\331\205\331\206\330\270\331\205\330\247\330\252 " "\331\204\330\247 \330\252\330\263\330\271\331\211 \331\204\331\204\330\261\330\250\330\255\330\214 " "\330\253\331\205 \330\252\330\255\331\210\331\204\330\252 " "\331\201\331\212 \330\247\331\204\330\263\331\206\331\210\330\247\330\252 " "\330\247\331\204\330\256\331\205\330\263 \330\247\331\204\331\205\330\247\330\266\331\212\330\251 " "\330\245\331\204\331\211 \331\205\330\244\330\263\330\263\330\247\330\252 " "\331\205\330\247\331\204\331\212\330\251 \331\205\331\206\330\270\331\205\330\251\330\214 " "\331\210\330\250\330\247\330\252\330\252 \330\254\330\262\330\241\330\247 " "\331\205\331\206 \330\247\331\204\331\206\330\270\330\247\331\205 " "\330\247\331\204\331\205\330\247\331\204\331\212 \331\201\331\212 " "\330\250\331\204\330\257\330\247\331\206\331\207\330\247\330\214 " "\331\210\331\204\331\203\331\206\331\207\330\247 \330\252\330\252\330\256\330\265\330\265 " "\331\201\331\212 \330\256\330\257\331\205\330\251 \331\202\330\267\330\247\330\271 " "\330\247\331\204\331\205\330\264\330\261\331\210\330\271\330\247\330\252 " "\330\247\331\204\330\265\330\272\331\212\330\261\330\251. \331\210\330\243\330\255\330\257 " "\330\243\331\203\330\253\330\261 \331\207\330\260\331\207 " "\330\247\331\204\331\205\330\244\330\263\330\263\330\247\330\252 " "\331\206\330\254\330\247\330\255\330\247 \331\207\331\210 " "\302\273\330\250\330\247\331\206\331\203\331\210\330\263\331\210\331\204\302\253 " "\331\201\331\212 \330\250\331\210\331\204\331\212\331\201\331\212\330\247.\n\n", -1, "rtl_quote", NULL); gtk_text_buffer_insert (buffer, &iter, "You can put widgets in the buffer: Here's a button: ", -1); gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, " and a menu: ", -1); gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, " and a scale: ", -1); gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, " and an animation: ", -1); gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, " finally a text entry: ", -1); gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, ".\n", -1); gtk_text_buffer_insert (buffer, &iter, "\n\nThis demo doesn't demonstrate all the GtkTextBuffer features; " "it leaves out, for example: invisible/hidden text, tab stops, " "application-drawn areas on the sides of the widget for displaying " "breakpoints and such...", -1); /* Apply word_wrap tag to whole buffer */ gtk_text_buffer_get_bounds (buffer, &start, &end); gtk_text_buffer_apply_tag_by_name (buffer, "word_wrap", &start, &end); g_object_unref (pixbuf); } static gboolean find_anchor (GtkTextIter *iter) { while (gtk_text_iter_forward_char (iter)) { if (gtk_text_iter_get_child_anchor (iter)) return TRUE; } return FALSE; } static void attach_widgets (GtkTextView *text_view) { GtkTextIter iter; GtkTextBuffer *buffer; int i; buffer = gtk_text_view_get_buffer (text_view); gtk_text_buffer_get_start_iter (buffer, &iter); i = 0; while (find_anchor (&iter)) { GtkTextChildAnchor *anchor; GtkWidget *widget; anchor = gtk_text_iter_get_child_anchor (&iter); if (i == 0) { widget = gtk_button_new_with_label ("Click Me"); g_signal_connect (widget, "clicked", G_CALLBACK (easter_egg_callback), NULL); } else if (i == 1) { widget = gtk_combo_box_text_new (); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Option 1"); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Option 2"); gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (widget), "Option 3"); } else if (i == 2) { widget = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, NULL); gtk_range_set_range (GTK_RANGE (widget), 0, 100); gtk_widget_set_size_request (widget, 70, -1); } else if (i == 3) { widget = gtk_image_new_from_resource ("/textview/floppybuddy.gif"); } else if (i == 4) { widget = gtk_entry_new (); } else { widget = NULL; /* avoids a compiler warning */ g_assert_not_reached (); } gtk_text_view_add_child_at_anchor (text_view, widget, anchor); gtk_widget_show_all (widget); ++i; } } GtkWidget * do_textview (GtkWidget *do_widget) { static GtkWidget *window = NULL; if (!window) { GtkWidget *vpaned; GtkWidget *view1; GtkWidget *view2; GtkWidget *sw; GtkTextBuffer *buffer; window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_screen (GTK_WINDOW (window), gtk_widget_get_screen (do_widget)); gtk_window_set_default_size (GTK_WINDOW (window), 450, 450); g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window); gtk_window_set_title (GTK_WINDOW (window), "TextView"); gtk_container_set_border_width (GTK_CONTAINER (window), 0); vpaned = gtk_paned_new (GTK_ORIENTATION_VERTICAL); gtk_container_set_border_width (GTK_CONTAINER(vpaned), 5); gtk_container_add (GTK_CONTAINER (window), vpaned); /* For convenience, we just use the autocreated buffer from * the first text view; you could also create the buffer * by itself with gtk_text_buffer_new(), then later create * a view widget. */ view1 = gtk_text_view_new (); buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view1)); view2 = gtk_text_view_new_with_buffer (buffer); sw = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_paned_add1 (GTK_PANED (vpaned), sw); gtk_container_add (GTK_CONTAINER (sw), view1); sw = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_paned_add2 (GTK_PANED (vpaned), sw); gtk_container_add (GTK_CONTAINER (sw), view2); create_tags (buffer); insert_text (buffer); attach_widgets (GTK_TEXT_VIEW (view1)); attach_widgets (GTK_TEXT_VIEW (view2)); gtk_widget_show_all (vpaned); } if (!gtk_widget_get_visible (window)) { gtk_widget_show (window); } else { gtk_widget_destroy (window); window = NULL; } return window; } static void recursive_attach_view (int depth, GtkTextView *view, GtkTextChildAnchor *anchor) { GtkWidget *child_view; GtkWidget *event_box; GdkRGBA color; if (depth > 4) return; child_view = gtk_text_view_new_with_buffer (gtk_text_view_get_buffer (view)); /* Event box is to add a black border around each child view */ event_box = gtk_event_box_new (); gdk_rgba_parse (&color, "black"); gtk_widget_override_background_color (event_box, 0, &color); gtk_widget_set_halign (child_view, GTK_ALIGN_FILL); gtk_widget_set_valign (child_view, GTK_ALIGN_FILL); gtk_container_add (GTK_CONTAINER (event_box), child_view); gtk_text_view_add_child_at_anchor (view, event_box, anchor); recursive_attach_view (depth + 1, GTK_TEXT_VIEW (child_view), anchor); } static void easter_egg_callback (GtkWidget *button, gpointer data) { static GtkWidget *window = NULL; gpointer window_ptr; GtkTextBuffer *buffer; GtkWidget *view; GtkTextIter iter; GtkTextChildAnchor *anchor; GtkWidget *sw; if (window) { gtk_window_present (GTK_WINDOW (window)); return; } buffer = gtk_text_buffer_new (NULL); gtk_text_buffer_get_start_iter (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, "This buffer is shared by a set of nested text views.\n Nested view:\n", -1); anchor = gtk_text_buffer_create_child_anchor (buffer, &iter); gtk_text_buffer_insert (buffer, &iter, "\nDon't do this in real applications, please.\n", -1); view = gtk_text_view_new_with_buffer (buffer); recursive_attach_view (0, GTK_TEXT_VIEW (view), anchor); g_object_unref (buffer); window = gtk_window_new (GTK_WINDOW_TOPLEVEL); sw = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_container_add (GTK_CONTAINER (window), sw); gtk_container_add (GTK_CONTAINER (sw), view); window_ptr = &window; g_object_add_weak_pointer (G_OBJECT (window), window_ptr); gtk_window_set_default_size (GTK_WINDOW (window), 300, 400); gtk_widget_show_all (window); }