103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/* Overlay/Decorative Overlay
|
|
* #Keywords: GtkOverlay
|
|
*
|
|
* Another example of an overlay with some decorative
|
|
* and some interactive controls.
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
|
|
static GtkTextTag *tag;
|
|
|
|
static void
|
|
margin_changed (GtkAdjustment *adjustment,
|
|
GtkTextView *text)
|
|
{
|
|
int value;
|
|
|
|
value = (int)gtk_adjustment_get_value (adjustment);
|
|
gtk_text_view_set_left_margin (GTK_TEXT_VIEW (text), value);
|
|
g_object_set (tag, "pixels-above-lines", value, NULL);
|
|
}
|
|
|
|
GtkWidget *
|
|
do_overlay_decorative (GtkWidget *do_widget)
|
|
{
|
|
static GtkWidget *window = NULL;
|
|
|
|
if (!window)
|
|
{
|
|
GtkWidget *overlay;
|
|
GtkWidget *sw;
|
|
GtkWidget *text;
|
|
GtkWidget *image;
|
|
GtkWidget *scale;
|
|
GtkTextBuffer *buffer;
|
|
GtkTextIter start, end;
|
|
GtkAdjustment *adjustment;
|
|
|
|
window = gtk_window_new ();
|
|
gtk_window_set_default_size (GTK_WINDOW (window), 500, 510);
|
|
gtk_window_set_title (GTK_WINDOW (window), "Decorative Overlay");
|
|
|
|
overlay = gtk_overlay_new ();
|
|
sw = gtk_scrolled_window_new ();
|
|
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
|
|
GTK_POLICY_AUTOMATIC,
|
|
GTK_POLICY_AUTOMATIC);
|
|
text = gtk_text_view_new ();
|
|
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text));
|
|
|
|
gtk_text_buffer_set_text (buffer, "Dear diary...", -1);
|
|
|
|
tag = gtk_text_buffer_create_tag (buffer, "top-margin",
|
|
"pixels-above-lines", 0,
|
|
NULL);
|
|
gtk_text_buffer_get_start_iter (buffer, &start);
|
|
end = start;
|
|
gtk_text_iter_forward_word_end (&end);
|
|
gtk_text_buffer_apply_tag (buffer, tag, &start, &end);
|
|
|
|
gtk_window_set_child (GTK_WINDOW (window), overlay);
|
|
gtk_overlay_set_child (GTK_OVERLAY (overlay), sw);
|
|
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), text);
|
|
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
|
|
|
|
image = gtk_picture_new_for_resource ("/overlay2/decor1.png");
|
|
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
|
|
gtk_widget_set_can_target (image, FALSE);
|
|
gtk_widget_set_halign (image, GTK_ALIGN_START);
|
|
gtk_widget_set_valign (image, GTK_ALIGN_START);
|
|
|
|
image = gtk_picture_new_for_resource ("/overlay2/decor2.png");
|
|
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), image);
|
|
gtk_widget_set_can_target (image, FALSE);
|
|
gtk_widget_set_halign (image, GTK_ALIGN_END);
|
|
gtk_widget_set_valign (image, GTK_ALIGN_END);
|
|
|
|
adjustment = gtk_adjustment_new (0, 0, 100, 1, 1, 0);
|
|
g_signal_connect (adjustment, "value-changed",
|
|
G_CALLBACK (margin_changed), text);
|
|
|
|
scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
|
|
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
|
|
gtk_widget_set_size_request (scale, 120, -1);
|
|
gtk_widget_set_margin_start (scale, 20);
|
|
gtk_widget_set_margin_end (scale, 20);
|
|
gtk_widget_set_margin_bottom (scale, 20);
|
|
gtk_overlay_add_overlay (GTK_OVERLAY (overlay), scale);
|
|
gtk_widget_set_halign (scale, GTK_ALIGN_START);
|
|
gtk_widget_set_valign (scale, GTK_ALIGN_END);
|
|
gtk_widget_set_tooltip_text (scale, "Margin");
|
|
|
|
gtk_adjustment_set_value (adjustment, 100);
|
|
}
|
|
|
|
if (!gtk_widget_get_visible (window))
|
|
gtk_widget_set_visible (window, TRUE);
|
|
else
|
|
gtk_window_destroy (GTK_WINDOW (window));
|
|
|
|
return window;
|
|
}
|