diff options
Diffstat (limited to 'src/cheese-flash.c')
| -rw-r--r-- | src/cheese-flash.c | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/src/cheese-flash.c b/src/cheese-flash.c deleted file mode 100644 index 3f6e399..0000000 --- a/src/cheese-flash.c +++ /dev/null @@ -1,226 +0,0 @@ -/* - * Copyright © 2008 Alexander “weej” Jones <alex@weej.com> - * Copyright © 2008 Thomas Perl <thp@thpinfo.com> - * Copyright © 2009 daniel g. siegel <dgsiegel@gnome.org> - * - * Licensed under the GNU General Public License Version 2 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include "config.h" - -#ifdef HAVE_X11 - -#include <gtk/gtk.h> - -#include "cheese-flash.h" - -/** - * SECTION:cheese-flash - * @short_description: Flash the screen, like a real camera flash - * @stability: Unstable - * @include: cheese/cheese-flash.h - * - * #CheeseFlash is a window that you can create and invoke a method "flash" on - * to temporarily flood the screen with white. - */ - -/* How long to hold the flash for, in milliseconds. */ -static const guint FLASH_DURATION = 150; - -/* The factor which defines how much the flash fades per frame */ -static const gdouble FLASH_FADE_FACTOR = 0.95; - -/* How many frames per second */ -static const guint FLASH_ANIMATION_RATE = 120; - -/* When to consider the flash finished so we can stop fading */ -static const gdouble FLASH_LOW_THRESHOLD = 0.01; - -/* - * CheeseFlashPrivate: - * @flash_timeout_tag: signal ID of the timeout to start fading in the flash - * @fade_timeout_tag: signal ID of the timeout to start fading out the flash - * - * Private data for #CheeseFlash. - */ -typedef struct -{ - /*< private >*/ - guint flash_timeout_tag; - guint fade_timeout_tag; - gdouble opacity; -} CheeseFlashPrivate; - -G_DEFINE_TYPE_WITH_PRIVATE (CheeseFlash, cheese_flash, GTK_TYPE_WINDOW) - -static void -cheese_flash_init (CheeseFlash *self) -{ - CheeseFlashPrivate *priv = cheese_flash_get_instance_private (self); - cairo_region_t *input_region; - GtkWindow *window = GTK_WINDOW (self); - const GdkRGBA white = { 1.0, 1.0, 1.0, 1.0 }; - - priv->flash_timeout_tag = 0; - priv->fade_timeout_tag = 0; - priv->opacity = 1.0; - - /* make it so it doesn't look like a window on the desktop (+fullscreen) */ - gtk_window_set_decorated (window, FALSE); - gtk_window_set_skip_taskbar_hint (window, TRUE); - gtk_window_set_skip_pager_hint (window, TRUE); - gtk_window_set_keep_above (window, TRUE); - - /* Don't take focus */ - gtk_window_set_accept_focus (window, FALSE); - gtk_window_set_focus_on_map (window, FALSE); - - /* Make it white */ - gtk_widget_override_background_color (GTK_WIDGET (window), GTK_STATE_NORMAL, - &white); - - /* Don't consume input */ - gtk_widget_realize (GTK_WIDGET (window)); - input_region = cairo_region_create (); - gdk_window_input_shape_combine_region (gtk_widget_get_window (GTK_WIDGET (window)), input_region, 0, 0); - cairo_region_destroy (input_region); -} - -static void -cheese_flash_class_init (CheeseFlashClass *klass) -{ -} - -/* - * cheese_flash_opacity_fade: - * @data: the #CheeseFlash - * - * Fade the flash out. - * - * Returns: %TRUE if the fade was completed, %FALSE if the flash must continue - * to fade - */ -static gboolean -cheese_flash_opacity_fade (gpointer data) -{ - CheeseFlashPrivate *priv; - GtkWidget *flash_window; - - flash_window = GTK_WIDGET (data); - priv = cheese_flash_get_instance_private (CHEESE_FLASH (data)); - - /* exponentially decrease */ - priv->opacity *= FLASH_FADE_FACTOR; - - if (priv->opacity <= FLASH_LOW_THRESHOLD) - { - /* the flasher has finished when we reach the quit value */ - priv->fade_timeout_tag = 0; - gtk_widget_destroy (flash_window); - return G_SOURCE_REMOVE; - } - else - { - gtk_widget_set_opacity (flash_window, priv->opacity); - } - - return G_SOURCE_CONTINUE; -} - -/* - * cheese_flash_start_fade: - * @data: the #CheeseFlash - * - * Add a timeout to start the fade animation. - * - * Returns: %FALSE - */ -static gboolean -cheese_flash_start_fade (gpointer data) -{ - CheeseFlashPrivate *priv = cheese_flash_get_instance_private (CHEESE_FLASH (data)); - GtkWindow *flash_window = GTK_WINDOW (data); - - /* If the screen is non-composited, just destroy and finish up */ - if (!gdk_screen_is_composited (gtk_window_get_screen (flash_window))) - { - gtk_widget_destroy (GTK_WIDGET (flash_window)); - return G_SOURCE_REMOVE; - } - - priv->fade_timeout_tag = g_timeout_add (1000.0 / FLASH_ANIMATION_RATE, cheese_flash_opacity_fade, data); - priv->flash_timeout_tag = 0; - return G_SOURCE_REMOVE; -} - -/** - * cheese_flash_fire: - * @flash: a #CheeseFlash - * @rect: a #GdkRectangle - * - * Fire the flash. - */ -void -cheese_flash_fire (CheeseFlash *flash, - GdkRectangle *rect) -{ - CheeseFlashPrivate *priv; - GtkWindow *flash_window; - - g_return_if_fail (CHEESE_IS_FLASH (flash)); - g_return_if_fail (rect != NULL); - - priv = cheese_flash_get_instance_private (flash); - flash_window = GTK_WINDOW (flash); - - if (priv->flash_timeout_tag > 0) - { - g_source_remove (priv->flash_timeout_tag); - priv->flash_timeout_tag = 0; - } - - if (priv->fade_timeout_tag > 0) - { - g_source_remove (priv->fade_timeout_tag); - priv->fade_timeout_tag = 0; - } - - priv->opacity = 1.0; - - gtk_window_resize (flash_window, rect->width, rect->height); - gtk_window_move (flash_window, rect->x, rect->y); - - gtk_widget_set_opacity (GTK_WIDGET (flash_window), 1); - gtk_widget_show_all (GTK_WIDGET (flash_window)); - priv->flash_timeout_tag = g_timeout_add (FLASH_DURATION, cheese_flash_start_fade, (gpointer) flash); -} - -/** - * cheese_flash_new: - * - * Create a new #CheeseFlash. - * - * Returns: a new #CheeseFlash - */ -CheeseFlash * -cheese_flash_new (void) -{ - return g_object_new (CHEESE_TYPE_FLASH, - "type", GTK_WINDOW_POPUP, - NULL); -} - -#endif |