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gtk4-demo: Add another scrolling case

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Add a case for text with various underlines. In particular error
underlines, since these are more complicated and use repeat nodes
and offscreens.
This commit is contained in:
Matthias Clasen 2024-10-02 07:21:31 -04:00
parent ded6d400d7
commit 64ecb972cf
3 changed files with 22389 additions and 29 deletions
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22315
demos/gtk-demo/Moby-Dick.txt Normal file
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File diff suppressed because it is too large Load Diff

1
demos/gtk-demo/demo.gresource.xml
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@ -441,6 +441,7 @@
<file>portland-rose-thumbnail.png</file>
<file>large-image-thumbnail.png</file>
<file compressed="true">large-image.png</file>
<file compressed="true">Moby-Dick.txt</file>
</gresource>
<gresource prefix="/org/gtk/Demo4/gtk">
<file preprocess="xml-stripblanks">help-overlay.ui</file>

102
demos/gtk-demo/iconscroll.c
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@ -13,7 +13,7 @@ static GtkWidget *window = NULL;
static GtkWidget *scrolledwindow;
static int selected;
#define N_WIDGET_TYPES 8
#define N_WIDGET_TYPES 9
static int hincrement = 5;
@ -73,30 +73,77 @@ populate_icons (void)
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (scrolledwindow), grid);
}
static char *content;
static gsize content_len;
extern void fontify (const char *format, GtkTextBuffer *buffer);
enum {
PLAIN_TEXT,
HIGHLIGHTED_TEXT,
UNDERLINED_TEXT,
};
static void
populate_text (gboolean highlight)
underlinify (GtkTextBuffer *buffer)
{
GtkTextTagTable *tags;
GtkTextTag *tag[3];
GtkTextIter start, end;
tags = gtk_text_buffer_get_tag_table (buffer);
tag[0] = gtk_text_tag_new ("error");
tag[1] = gtk_text_tag_new ("strikeout");
tag[2] = gtk_text_tag_new ("double");
g_object_set (tag[0], "underline", PANGO_UNDERLINE_ERROR, NULL);
g_object_set (tag[1], "strikethrough", TRUE, NULL);
g_object_set (tag[2],
"underline", PANGO_UNDERLINE_DOUBLE,
"underline-rgba", &(GdkRGBA){0., 1., 1., 1. },
NULL);
gtk_text_tag_table_add (tags, tag[0]);
gtk_text_tag_table_add (tags, tag[1]);
gtk_text_tag_table_add (tags, tag[2]);
gtk_text_buffer_get_start_iter (buffer, &end);
while (TRUE)
{
gtk_text_iter_forward_word_end (&end);
start = end;
gtk_text_iter_backward_word_start (&start);
gtk_text_buffer_apply_tag (buffer, tag[g_random_int_range (0, 3)], &start, &end);
if (!gtk_text_iter_forward_word_ends (&end, 3))
break;
}
}
static void
populate_text (const char *resource, int kind)
{
GtkWidget *textview;
GtkTextBuffer *buffer;
char *content;
gsize content_len;
GBytes *bytes;
if (!content)
{
GBytes *bytes;
bytes = g_resources_lookup_data ("/sources/font_features.c", 0, NULL);
content = g_bytes_unref_to_data (bytes, &content_len);
}
bytes = g_resources_lookup_data (resource, 0, NULL);
content = g_bytes_unref_to_data (bytes, &content_len);
buffer = gtk_text_buffer_new (NULL);
gtk_text_buffer_set_text (buffer, content, (int)content_len);
if (highlight)
fontify ("c", buffer);
switch (kind)
{
case HIGHLIGHTED_TEXT:
fontify ("c", buffer);
break;
case UNDERLINED_TEXT:
underlinify (buffer);
break;
case PLAIN_TEXT:
default:
break;
}
textview = gtk_text_view_new ();
gtk_text_view_set_buffer (GTK_TEXT_VIEW (textview), buffer);
@ -155,14 +202,6 @@ populate_image (void)
{
GtkWidget *image;
if (!content)
{
GBytes *bytes;
bytes = g_resources_lookup_data ("/sources/font_features.c", 0, NULL);
content = g_bytes_unref_to_data (bytes, &content_len);
}
image = gtk_picture_new_for_resource ("/sliding_puzzle/portland-rose.jpg");
gtk_picture_set_can_shrink (GTK_PICTURE (image), FALSE);
@ -255,35 +294,40 @@ set_widget_type (int type)
case 1:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling plain text");
populate_text (FALSE);
populate_text ("/sources/font_features.c", PLAIN_TEXT);
break;
case 2:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling complex text");
populate_text (TRUE);
gtk_window_set_title (GTK_WINDOW (window), "Scrolling colored text");
populate_text ("/sources/font_features.c", HIGHLIGHTED_TEXT);
break;
case 3:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling text with underlines");
populate_text ("/org/gtk/Demo4/Moby-Dick.txt", UNDERLINED_TEXT);
break;
case 4:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling text with Emoji");
populate_emoji_text ();
break;
case 4:
case 5:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling a big image");
populate_image ();
break;
case 5:
case 6:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling a list");
populate_list ();
break;
case 6:
case 7:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling a columned list");
populate_list2 ();
break;
case 7:
case 8:
gtk_window_set_title (GTK_WINDOW (window), "Scrolling a grid");
populate_grid ();
break;