gtk/tests/testtextview.c
Matthias Clasen 386b63b85d scrolledwindow: Don't take adjustments in new()
In 99.9% of all cases, these are just NULL, NULL.
So just do away with these arguments, people can
use the setters for the rare cases where they want
the scrolled window to use a different adjustment.
2020-06-24 11:25:09 -04:00

211 lines
7.1 KiB
C

#include "config.h"
#include <gtk/gtk.h>
typedef struct {
GtkTextView parent;
} MyTextView;
typedef struct {
GtkTextViewClass parent_class;
} MyTextViewClass;
static GType my_text_view_get_type (void);
G_DEFINE_TYPE (MyTextView, my_text_view, GTK_TYPE_TEXT_VIEW);
static void snapshot_background (GtkWidget *widget, GtkSnapshot *snapshot);
static void
my_text_view_init (MyTextView *text_view)
{
}
static void my_text_view_snapshot_layer (GtkTextView *textview,
GtkTextViewLayer layer,
GtkSnapshot *snapshot)
{
if (layer == GTK_TEXT_VIEW_LAYER_BELOW_TEXT)
snapshot_background (GTK_WIDGET (textview), snapshot);
}
static void
my_text_view_class_init (MyTextViewClass *klass)
{
GTK_TEXT_VIEW_CLASS (klass)->snapshot_layer = my_text_view_snapshot_layer;
}
static void
create_tags (GtkTextBuffer *buffer)
{
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, "x-large",
"scale", PANGO_SCALE_X_LARGE, NULL);
gtk_text_buffer_create_tag (buffer, "semi_blue_foreground",
"foreground", "rgba(0,0,255,0.7)", NULL);
gtk_text_buffer_create_tag (buffer, "semi_red_background",
"background", "rgba(255,0,0,0.5)", NULL);
gtk_text_buffer_create_tag (buffer, "semi_orange_paragraph_background",
"paragraph-background", "rgba(255,165,0,0.5)", NULL);
gtk_text_buffer_create_tag (buffer, "word_wrap",
"wrap_mode", GTK_WRAP_WORD, NULL);
}
static GtkTextChildAnchor *
insert_text (GtkTextBuffer *buffer)
{
GtkTextIter iter;
GtkTextIter start, end;
GtkTextMark *para_start;
GtkTextChildAnchor *anchor;
/* 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,
"This test shows text view rendering some text with rgba colors.\n\n", -1);
gtk_text_buffer_insert (buffer, &iter, "For example, you can have ", -1);
gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
"italic translucent blue text", -1,
"italic",
"semi_blue_foreground",
"x-large",
NULL);
gtk_text_buffer_insert (buffer, &iter, ", or ", -1);
gtk_text_buffer_insert (buffer, &iter, ", ", -1);
gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
"bold text with translucent red background", -1,
"bold",
"semi_red_background",
"x-large",
NULL);
gtk_text_buffer_insert (buffer, &iter, ".\n\n", -1);
anchor = gtk_text_buffer_create_child_anchor (buffer, &iter);
/* Store the beginning of the other paragraph */
para_start = gtk_text_buffer_create_mark (buffer, "para_start", &iter, TRUE);
gtk_text_buffer_insert (buffer, &iter,
"Paragraph background colors can also be set with rgba color values .\n", -1);
gtk_text_buffer_insert (buffer, &iter, "For instance, you can have ", -1);
gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
"bold translucent blue text", -1,
"bold",
"semi_blue_foreground",
"x-large",
NULL);
gtk_text_buffer_insert (buffer, &iter, ", or ", -1);
gtk_text_buffer_insert (buffer, &iter, ", ", -1);
gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
"italic text with translucent red background", -1,
"italic",
"semi_red_background",
"x-large",
NULL);
gtk_text_buffer_insert (buffer, &iter, " all rendered onto a translucent orange paragraph background.\n", -1);
gtk_text_buffer_get_bounds (buffer, &start, &end);
gtk_text_buffer_get_iter_at_mark (buffer, &iter, para_start);
gtk_text_buffer_apply_tag_by_name (buffer, "semi_orange_paragraph_background", &iter, &end);
/* 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);
return anchor;
}
/* Size of checks and gray levels for alpha compositing checkerboard */
#define CHECK_SIZE 10
#define CHECK_DARK (1.0 / 3.0)
#define CHECK_LIGHT (2.0 / 3.0)
static void
snapshot_background (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GdkRectangle visible_rect;
gtk_text_view_get_visible_rect (GTK_TEXT_VIEW (widget), &visible_rect);
gtk_snapshot_append_color (snapshot,
&(GdkRGBA) { CHECK_DARK, CHECK_DARK, CHECK_DARK, 1.0 },
&GRAPHENE_RECT_INIT(visible_rect.x, visible_rect.y, visible_rect.width, visible_rect.height));
gtk_snapshot_push_repeat (snapshot,
&GRAPHENE_RECT_INIT(visible_rect.x, visible_rect.y, visible_rect.width, visible_rect.height),
&GRAPHENE_RECT_INIT(visible_rect.x, visible_rect.y, CHECK_SIZE * 2, CHECK_SIZE * 2));
gtk_snapshot_append_color (snapshot,
&(GdkRGBA) { CHECK_LIGHT, CHECK_LIGHT, CHECK_LIGHT, 1.0 },
&GRAPHENE_RECT_INIT(visible_rect.x, visible_rect.y, CHECK_SIZE, CHECK_SIZE));
gtk_snapshot_append_color (snapshot,
&(GdkRGBA) { CHECK_LIGHT, CHECK_LIGHT, CHECK_LIGHT, 1.0 },
&GRAPHENE_RECT_INIT(visible_rect.x + CHECK_SIZE, visible_rect.y + CHECK_SIZE, CHECK_SIZE, CHECK_SIZE));
gtk_snapshot_pop (snapshot);
}
int
main (int argc, char **argv)
{
GtkWidget *window, *textview, *sw, *button, *button2;
GtkTextBuffer *buffer;
GtkTextChildAnchor *anchor;
gtk_init ();
window = gtk_window_new ();
sw = gtk_scrolled_window_new ();
textview = g_object_new (my_text_view_get_type (), NULL);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textview));
button = gtk_button_new_with_label ("Fixed Child");
button2 = gtk_button_new_with_label ("Flowed Child");
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_window_set_default_size (GTK_WINDOW (window), 400, 400);
create_tags (buffer);
anchor = insert_text (buffer);
gtk_window_set_child (GTK_WINDOW (window), sw);
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), textview);
gtk_text_view_add_overlay (GTK_TEXT_VIEW (textview),
button,
50, 150);
gtk_text_view_add_child_at_anchor (GTK_TEXT_VIEW (textview),
button2, anchor);
gtk_widget_show (window);
while (TRUE)
g_main_context_iteration (NULL, TRUE);
return 0;
}