summaryrefslogtreecommitdiff
path: root/gtk+-mingw/share/gtk-3.0/demo/transparent.c
diff options
context:
space:
mode:
Diffstat (limited to 'gtk+-mingw/share/gtk-3.0/demo/transparent.c')
-rw-r--r--gtk+-mingw/share/gtk-3.0/demo/transparent.c248
1 files changed, 0 insertions, 248 deletions
diff --git a/gtk+-mingw/share/gtk-3.0/demo/transparent.c b/gtk+-mingw/share/gtk-3.0/demo/transparent.c
deleted file mode 100644
index 21c6a0b..0000000
--- a/gtk+-mingw/share/gtk-3.0/demo/transparent.c
+++ /dev/null
@@ -1,248 +0,0 @@
-/* Transparent
- *
- * Use transparent background on GdkWindows to create a shadow effect on a GtkOverlay widget.
- */
-
-#include <gtk/gtk.h>
-
-#define SHADOW_OFFSET_X 7
-#define SHADOW_OFFSET_Y 7
-#define SHADOW_RADIUS 5
-
-static void
-draw_shadow_box (cairo_t *cr,
- GdkRectangle rect,
- double radius,
- double transparency)
-{
- cairo_pattern_t *pattern;
- double x0, x1, x2, x3;
- double y0, y1, y2, y3;
-
- x0 = rect.x;
- x1 = rect.x + radius;
- x2 = rect.x + rect.width - radius;
- x3 = rect.x + rect.width;
-
- y0 = rect.y;
- y1 = rect.y + radius;
- y2 = rect.y + rect.height - radius;
- y3 = rect.y + rect.height;
-
- /* Fill non-border part */
- cairo_set_source_rgba (cr, 0, 0, 0, transparency);
- cairo_rectangle (cr,
- x1, y1, x2 - x1, y2 - y1);
- cairo_fill (cr);
-
- /* Upper border */
-
- pattern = cairo_pattern_create_linear (0, y0, 0, y1);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, 0.0);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, transparency);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x1, y0,
- x2 - x1, y1 - y0);
- cairo_fill (cr);
-
- /* Bottom border */
-
- pattern = cairo_pattern_create_linear (0, y2, 0, y3);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x1, y2,
- x2 - x1, y3 - y2);
- cairo_fill (cr);
-
- /* Left border */
-
- pattern = cairo_pattern_create_linear (x0, 0, x1, 0);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, 0.0);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, transparency);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x0, y1,
- x1 - x0, y2 - y1);
- cairo_fill (cr);
-
- /* Right border */
-
- pattern = cairo_pattern_create_linear (x2, 0, x3, 0);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x2, y1,
- x3 - x2, y2 - y1);
- cairo_fill (cr);
-
- /* NW corner */
-
- pattern = cairo_pattern_create_radial (x1, y1, 0,
- x1, y1, radius);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x0, y0,
- x1 - x0, y1 - y0);
- cairo_fill (cr);
-
- /* NE corner */
-
- pattern = cairo_pattern_create_radial (x2, y1, 0,
- x2, y1, radius);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x2, y0,
- x3 - x2, y1 - y0);
- cairo_fill (cr);
-
- /* SW corner */
-
- pattern = cairo_pattern_create_radial (x1, y2, 0,
- x1, y2, radius);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x0, y2,
- x1 - x0, y3 - y2);
- cairo_fill (cr);
-
- /* SE corner */
-
- pattern = cairo_pattern_create_radial (x2, y2, 0,
- x2, y2, radius);
-
- cairo_pattern_add_color_stop_rgba (pattern, 0.0, 0.0, 0, 0, transparency);
- cairo_pattern_add_color_stop_rgba (pattern, 1.0, 0.0, 0, 0, 0.0);
-
- cairo_set_source (cr, pattern);
- cairo_pattern_destroy (pattern);
-
- cairo_rectangle (cr,
- x2, y2,
- x3 - x2, y3 - y2);
- cairo_fill (cr);
-}
-
-static gboolean
-draw_callback (GtkWidget *widget,
- cairo_t *cr,
- gpointer data)
-{
- GdkRectangle rect;
-
- gtk_widget_get_allocation (widget, &rect);
- rect.x += SHADOW_OFFSET_X;
- rect.y += SHADOW_OFFSET_Y;
- rect.width -= SHADOW_OFFSET_X;
- rect.height -= SHADOW_OFFSET_Y;
-
- draw_shadow_box (cr,
- rect, SHADOW_RADIUS, 0.4);
-
- return FALSE;
-}
-
-GtkWidget *
-do_transparent (GtkWidget *do_widget)
-{
- static GtkWidget *window = NULL;
-
- if (!window)
- {
- GtkWidget *view;
- GtkWidget *sw;
- GtkWidget *overlay;
- GtkWidget *align;
- GtkWidget *entry;
- GdkRGBA transparent = {0, 0, 0, 0};
-
- 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), "Transparent");
- gtk_container_set_border_width (GTK_CONTAINER (window), 0);
-
- view = gtk_text_view_new ();
-
- 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 (sw), view);
-
- overlay = gtk_overlay_new ();
- gtk_container_add (GTK_CONTAINER (overlay), sw);
- gtk_container_add (GTK_CONTAINER (window), overlay);
-
- gtk_widget_override_background_color (overlay, 0, &transparent);
-
- align = gtk_alignment_new (0.0, 0.0, 0.0, 0.0);
- gtk_alignment_set_padding (GTK_ALIGNMENT (align),
- 0, SHADOW_OFFSET_Y, 0, SHADOW_OFFSET_X);
- g_signal_connect (align, "draw", G_CALLBACK (draw_callback), NULL);
-
- entry = gtk_entry_new ();
- gtk_container_add (GTK_CONTAINER (align), entry);
-
- gtk_overlay_add_overlay (GTK_OVERLAY (overlay), align);
- gtk_widget_set_halign (align, GTK_ALIGN_CENTER);
- gtk_widget_set_valign (align, GTK_ALIGN_START);
-
- gtk_widget_show_all (overlay);
- }
-
- if (!gtk_widget_get_visible (window))
- {
- gtk_widget_show (window);
- }
- else
- {
- gtk_widget_destroy (window);
- window = NULL;
- }
-
- return window;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-07 20:08:20 +0000