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gtk-demo: Spruce up the hypertext demo

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Use the newish allow-breaks pango attribute
to make the text break better.
This commit is contained in:
Matthias Clasen 2021-08-07 12:08:29 -04:00
parent 54c087e7ec
commit 256f3a0d60
1 changed files with 49 additions and 22 deletions
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71
demos/gtk-demo/hypertext.c
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@ -61,12 +61,26 @@ show_page (GtkTextView *text_view,
int page)
{
GtkTextBuffer *buffer;
GtkTextIter iter;
GtkTextIter iter, start;
GtkTextMark *mark;
GtkWidget *child;
GtkTextChildAnchor *anchor;
GtkEventController *controller;
GtkTextTag *bold, *mono, *nobreaks;
buffer = gtk_text_view_get_buffer (text_view);
bold = gtk_text_buffer_create_tag (buffer, NULL,
"weight", PANGO_WEIGHT_BOLD,
"scale", PANGO_SCALE_X_LARGE,
NULL);
mono = gtk_text_buffer_create_tag (buffer, NULL,
"family", "monospace",
NULL);
nobreaks = gtk_text_buffer_create_tag (buffer, NULL,
"allow-breaks", FALSE,
NULL);
gtk_text_buffer_set_text (buffer, "", 0);
gtk_text_buffer_get_iter_at_offset (buffer, &iter, 0);
gtk_text_buffer_begin_irreversible_action (buffer);
@ -104,17 +118,22 @@ show_page (GtkTextView *text_view,
}
else if (page == 2)
{
GtkTextTag *tag;
mark = gtk_text_buffer_create_mark (buffer, "mark", &iter, TRUE);
tag = gtk_text_buffer_create_tag (buffer, NULL,
"weight", PANGO_WEIGHT_BOLD,
"scale", PANGO_SCALE_X_LARGE,
NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, "tag", -1, tag, NULL);
tag = gtk_text_buffer_create_tag (buffer, NULL,
"family", "monospace",
NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, " / tag / ", -1, tag, NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, "tag", -1, bold, NULL);
gtk_text_buffer_insert (buffer, &iter, " /", -1);
gtk_text_buffer_get_iter_at_mark (buffer, &start, mark);
gtk_text_buffer_apply_tag (buffer, nobreaks, &start, &iter);
gtk_text_buffer_insert (buffer, &iter, " ", -1);
gtk_text_buffer_move_mark (buffer, mark, &iter);
gtk_text_buffer_insert_with_tags (buffer, &iter, "tag", -1, mono, NULL);
gtk_text_buffer_insert (buffer, &iter, " /", -1);
gtk_text_buffer_get_iter_at_mark (buffer, &start, mark);
gtk_text_buffer_apply_tag (buffer, nobreaks, &start, &iter);
gtk_text_buffer_insert (buffer, &iter, " ", -1);
anchor = gtk_text_buffer_create_child_anchor (buffer, &iter);
child = gtk_image_new_from_icon_name ("audio-volume-high-symbolic");
@ -132,20 +151,26 @@ show_page (GtkTextView *text_view,
"behavior of mouse and key presses, “lock” a range of text so the "
"user can't edit it, or countless other things.\n", -1);
insert_link (buffer, &iter, "Go back", 1);
gtk_text_buffer_delete_mark (buffer, mark);
}
else if (page == 3)
{
GtkTextTag *tag;
mark = gtk_text_buffer_create_mark (buffer, "mark", &iter, TRUE);
tag = gtk_text_buffer_create_tag (buffer, NULL,
"weight", PANGO_WEIGHT_BOLD,
"scale", PANGO_SCALE_X_LARGE,
NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, "hypertext", -1, tag, NULL);
tag = gtk_text_buffer_create_tag (buffer, NULL,
"family", "monospace",
NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, " / ˈhaɪ pərˌtɛkst / ", -1, tag, NULL);
gtk_text_buffer_insert_with_tags (buffer, &iter, "hypertext", -1, bold, NULL);
gtk_text_buffer_insert (buffer, &iter, " /", -1);
gtk_text_buffer_get_iter_at_mark (buffer, &start, mark);
gtk_text_buffer_apply_tag (buffer, nobreaks, &start, &iter);
gtk_text_buffer_insert (buffer, &iter, " ", -1);
gtk_text_buffer_move_mark (buffer, mark, &iter);
gtk_text_buffer_insert_with_tags (buffer, &iter, "ˈhaɪ pərˌtɛkst", -1, mono, NULL);
gtk_text_buffer_insert (buffer, &iter, " /", -1);
gtk_text_buffer_get_iter_at_mark (buffer, &start, mark);
gtk_text_buffer_apply_tag (buffer, nobreaks, &start, &iter);
gtk_text_buffer_insert (buffer, &iter, " ", -1);
anchor = gtk_text_buffer_create_child_anchor (buffer, &iter);
child = gtk_image_new_from_icon_name ("audio-volume-high-symbolic");
@ -159,6 +184,8 @@ show_page (GtkTextView *text_view,
"Machine-readable text that is not sequential but is organized "
"so that related items of information are connected.\n", -1);
insert_link (buffer, &iter, "Go back", 1);
gtk_text_buffer_delete_mark (buffer, mark);
}
gtk_text_buffer_end_irreversible_action (buffer);
}
@ -358,7 +385,7 @@ do_hypertext (GtkWidget *do_widget)
sw = gtk_scrolled_window_new ();
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_NEVER,
GTK_POLICY_AUTOMATIC);
gtk_window_set_child (GTK_WINDOW (window), sw);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), view);