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|
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-background.c: Object for the background of a widget.
Copyright (C) 2000 Eazel, Inc.
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, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Darin Adler <darin@eazel.com>
*/
#include <config.h>
#include <ctype.h>
#include "nautilus-background.h"
#include <math.h>
#include <stdio.h>
#include "nautilus-glib-extensions.h"
#include <gtk/gtksignal.h>
#include "nautilus-gdk-extensions.h"
#include "nautilus-gdk-pixbuf-extensions.h"
#include "nautilus-gnome-extensions.h"
#include "nautilus-background-canvas-group.h"
#include "nautilus-lib-self-check-functions.h"
#include "nautilus-gtk-macros.h"
#include "nautilus-string.h"
#include <libgnomeui/gnome-canvas.h>
#include <libgnomeui/gnome-canvas-util.h>
#include <libart_lgpl/art_rgb.h>
static void nautilus_background_initialize_class (gpointer klass);
static void nautilus_background_initialize (gpointer object,
gpointer klass);
static void nautilus_background_destroy (GtkObject *object);
static void nautilus_background_draw_flat_box (GtkStyle *style,
GdkWindow *window,
GtkStateType state_type,
GtkShadowType shadow_type,
GdkRectangle *area,
GtkWidget *widget,
char *detail,
int x,
int y,
int width,
int height);
static void nautilus_background_start_loading_image (NautilusBackground *background, gboolean emit_appearance_change);
static gboolean nautilus_background_is_image_load_in_progress (NautilusBackground *background);
NAUTILUS_DEFINE_CLASS_BOILERPLATE (NautilusBackground, nautilus_background, GTK_TYPE_OBJECT)
enum {
APPEARANCE_CHANGED,
SETTINGS_CHANGED,
IMAGE_LOADING_DONE,
RESET,
LAST_SIGNAL
};
#define RESET_BACKGROUND_MAGIC_IMAGE_NAME "reset.png"
static guint signals[LAST_SIGNAL];
struct NautilusBackgroundDetails {
char *color;
int gradient_num_pixels;
guchar *gradient_buffer;
gboolean gradient_is_horizontal;
gboolean is_solid_color;
GdkColor solid_color;
char *image_uri;
GdkPixbuf *image;
int image_width_unscaled;
int image_height_unscaled;
NautilusPixbufLoadHandle *load_image_handle;
gboolean emit_after_load;
gboolean combine_mode;
NautilusBackgroundImagePlacement image_placement;
/* The image_rect is the area (canvas relative) the image will cover.
* Note: image_rect_width/height are not always the same as the image's
* width and height - e.g. if the image is tiled the image rect covers
* the whole background.
*/
int image_rect_x;
int image_rect_y;
int image_rect_width;
int image_rect_height;
};
static void
nautilus_background_initialize_class (gpointer klass)
{
GtkObjectClass *object_class;
NautilusBackgroundClass *background_class;
object_class = GTK_OBJECT_CLASS (klass);
background_class = NAUTILUS_BACKGROUND_CLASS (klass);
signals[APPEARANCE_CHANGED] =
gtk_signal_new ("appearance_changed",
GTK_RUN_LAST | GTK_RUN_NO_RECURSE,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusBackgroundClass,
appearance_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE,
0);
signals[SETTINGS_CHANGED] =
gtk_signal_new ("settings_changed",
GTK_RUN_LAST | GTK_RUN_NO_RECURSE,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusBackgroundClass,
settings_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE,
0);
signals[IMAGE_LOADING_DONE] =
gtk_signal_new ("image_loading_done",
GTK_RUN_LAST | GTK_RUN_NO_RECURSE,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusBackgroundClass,
image_loading_done),
gtk_marshal_NONE__BOOL,
GTK_TYPE_NONE,
1,
GTK_TYPE_BOOL);
signals[RESET] =
gtk_signal_new ("reset",
GTK_RUN_LAST | GTK_RUN_NO_RECURSE,
object_class->type,
GTK_SIGNAL_OFFSET (NautilusBackgroundClass,
reset),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE,
0);
gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
object_class->destroy = nautilus_background_destroy;
}
static void
nautilus_background_initialize (gpointer object, gpointer klass)
{
NautilusBackground *background;
background = NAUTILUS_BACKGROUND(object);
background->details = g_new0 (NautilusBackgroundDetails, 1);
}
/* The safe way to clear an image from a background is:
* nautilus_background_set_image_uri (NULL);
* This fn is a private utility - it does NOT clear
* the details->image_uri setting.
*/
static void
nautilus_background_remove_current_image (NautilusBackground *background)
{
if (background->details->image != NULL) {
gdk_pixbuf_unref (background->details->image);
background->details->image = NULL;
}
}
static void
nautilus_background_destroy (GtkObject *object)
{
NautilusBackground *background;
background = NAUTILUS_BACKGROUND (object);
nautilus_cancel_gdk_pixbuf_load (background->details->load_image_handle);
background->details->load_image_handle = NULL;
g_free (background->details->color);
g_free (background->details->gradient_buffer);
g_free (background->details->image_uri);
nautilus_background_remove_current_image (background);
g_free (background->details);
NAUTILUS_CALL_PARENT_CLASS (GTK_OBJECT_CLASS, destroy, (object));
}
/* handle the combine mode getting and setting */
gboolean
nautilus_background_get_combine_mode (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background),
FALSE);
return background->details->combine_mode;
}
void
nautilus_background_set_combine_mode (NautilusBackground *background, gboolean new_combine_mode)
{
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
g_return_if_fail (new_combine_mode == FALSE || new_combine_mode == TRUE);
if (new_combine_mode != background->details->combine_mode) {
background->details->combine_mode = new_combine_mode;
gtk_signal_emit (GTK_OBJECT (background), signals[SETTINGS_CHANGED]);
gtk_signal_emit (GTK_OBJECT (background), signals[APPEARANCE_CHANGED]);
}
}
NautilusBackgroundImagePlacement
nautilus_background_get_image_placement (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), NAUTILUS_BACKGROUND_TILED);
return background->details->image_placement;
}
static gboolean
nautilus_background_set_image_placement_no_emit (NautilusBackground *background,
NautilusBackgroundImagePlacement new_placement)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
if (new_placement != background->details->image_placement) {
if (nautilus_background_is_image_load_in_progress (background)) {
/* We try to be smart and keep using the current image for updates
* while a new image is loading. However, changing the placement
* foils these plans.
*/
nautilus_background_remove_current_image (background);
}
background->details->image_placement = new_placement;
return TRUE;
} else {
return FALSE;
}
}
void
nautilus_background_set_image_placement (NautilusBackground *background,
NautilusBackgroundImagePlacement new_placement)
{
if (nautilus_background_set_image_placement_no_emit (background, new_placement)) {
gtk_signal_emit (GTK_OBJECT (background),
signals[SETTINGS_CHANGED]);
gtk_signal_emit (GTK_OBJECT (background),
signals[APPEARANCE_CHANGED]);
}
}
NautilusBackground *
nautilus_background_new (void)
{
return NAUTILUS_BACKGROUND (gtk_object_new (NAUTILUS_TYPE_BACKGROUND, NULL));
}
static void
reset_cached_color_info (NautilusBackground *background)
{
background->details->gradient_num_pixels = 0;
background->details->is_solid_color = !nautilus_gradient_is_gradient (background->details->color);
if (background->details->is_solid_color) {
g_free (background->details->gradient_buffer);
background->details->gradient_buffer = NULL;
nautilus_gdk_color_parse_with_white_default (background->details->color, &background->details->solid_color);
} else {
/* If color is still a gradient, don't g_free the buffer, nautilus_background_ensure_gradient_buffered
* uses g_realloc to try to reuse it.
*/
background->details->gradient_is_horizontal = nautilus_gradient_is_horizontal (background->details->color);
}
}
static void
nautilus_background_ensure_gradient_buffered (NautilusBackground *background, int dest_width, int dest_height)
{
int num_pixels;
guchar *buff_ptr;
guchar *buff_limit;
GdkColor cur_color;
char* color_spec;
const char* spec_ptr;
if (background->details->is_solid_color) {
return;
}
num_pixels = background->details->gradient_is_horizontal ? dest_width : dest_height;
if (background->details->gradient_num_pixels == num_pixels) {
return;
}
background->details->gradient_num_pixels = num_pixels;
background->details->gradient_buffer = g_realloc (background->details->gradient_buffer, num_pixels * 3);
buff_ptr = background->details->gradient_buffer;
buff_limit = background->details->gradient_buffer + num_pixels * 3;
spec_ptr = background->details->color;
color_spec = nautilus_gradient_parse_one_color_spec (spec_ptr, NULL, &spec_ptr);
nautilus_gdk_color_parse_with_white_default (color_spec, &cur_color);
g_free (color_spec);
while (spec_ptr != NULL && buff_ptr < buff_limit) {
int percent;
int fill_pos;
int fill_width;
int dr, dg, db;
guchar *fill_limit;
GdkColor new_color;
color_spec = nautilus_gradient_parse_one_color_spec (spec_ptr, &percent, &spec_ptr);
nautilus_gdk_color_parse_with_white_default (color_spec, &new_color);
g_free (color_spec);
dr = new_color.red - cur_color.red;
dg = new_color.green - cur_color.green;
db = new_color.blue - cur_color.blue;
fill_pos = 1;
fill_limit = MIN (background->details->gradient_buffer + 3 * ((num_pixels * percent) / 100), buff_limit);
fill_width = (fill_limit - buff_ptr) / 3;
while (buff_ptr < fill_limit) {
*buff_ptr++ = (cur_color.red + (dr * fill_pos) / fill_width) >> 8;
*buff_ptr++ = (cur_color.green + (dg * fill_pos) / fill_width) >> 8;
*buff_ptr++ = (cur_color.blue + (db * fill_pos) / fill_width) >> 8;
++fill_pos;
}
cur_color = new_color;
}
/* fill in the remainder */
art_rgb_fill_run (buff_ptr, cur_color.red, cur_color.green, cur_color.blue, (buff_limit - buff_ptr) / 3);
}
static void
canvas_gradient_helper_v (const GnomeCanvasBuf *buf, const art_u8 *gradient_buff)
{
int width = buf->rect.x1 - buf->rect.x0;
int height = buf->rect.y1 - buf->rect.y0;
art_u8 *dst = buf->buf;
art_u8 *dst_limit = buf->buf + height * buf->buf_rowstride;
gradient_buff += buf->rect.y0 * 3;
while (dst < dst_limit) {
art_u8 r = *gradient_buff++;
art_u8 g = *gradient_buff++;
art_u8 b = *gradient_buff++;
art_rgb_fill_run (dst, r, g, b, width);
dst += buf->buf_rowstride;
}
}
static void
canvas_gradient_helper_h (const GnomeCanvasBuf *buf, const art_u8 *gradient_buff)
{
int width = buf->rect.x1 - buf->rect.x0;
int height = buf->rect.y1 - buf->rect.y0;
art_u8 *dst = buf->buf;
art_u8 *dst_limit = buf->buf + height * buf->buf_rowstride;
int copy_bytes_per_row = width * 3;
gradient_buff += buf->rect.x0 * 3;
while (dst < dst_limit) {
memcpy (dst, gradient_buff, copy_bytes_per_row);
dst += buf->buf_rowstride;
}
}
static void
fill_canvas_from_gradient_buffer (const GnomeCanvasBuf *buf, const NautilusBackground *background)
{
g_return_if_fail (background->details->gradient_buffer != NULL);
/* FIXME bugzilla.eazel.com 4876: This hack is needed till we fix background
* scolling.
*
* I.e. currently you can scroll off the end of the gradient - and we
* handle this by pegging it the the last rgb value.
*
* It might be needed permanently after depending on how this is fixed.
* If we tie gradients to the boundry of icon placement (as opposed to
* window size) then when dragging an icon you might scroll off the
* end of the gradient - which will get recaluated after the drop.
*/
if (background->details->gradient_is_horizontal) {
if (buf->rect.x1 > background->details->gradient_num_pixels) {
art_u8 *rgb888 = background->details->gradient_buffer + (background->details->gradient_num_pixels - 1) * 3;
GnomeCanvasBuf gradient = *buf;
GnomeCanvasBuf overflow = *buf;
gradient.rect.x1 = gradient.rect.x0 < background->details->gradient_num_pixels ? background->details->gradient_num_pixels : gradient.rect.x0;
overflow.buf += (gradient.rect.x1 - gradient.rect.x0) * 3;
overflow.rect.x0 = gradient.rect.x1;
nautilus_gnome_canvas_fill_rgb (&overflow, rgb888[0], rgb888[1], rgb888[2]);
canvas_gradient_helper_h (&gradient, background->details->gradient_buffer);
return;
}
} else {
if (buf->rect.y1 > background->details->gradient_num_pixels) {
art_u8 *rgb888 = background->details->gradient_buffer + (background->details->gradient_num_pixels - 1) * 3;
GnomeCanvasBuf gradient = *buf;
GnomeCanvasBuf overflow = *buf;
gradient.rect.y1 = gradient.rect.y0 < background->details->gradient_num_pixels ? background->details->gradient_num_pixels : gradient.rect.y0;
overflow.buf += (gradient.rect.y1 - gradient.rect.y0) * gradient.buf_rowstride;
overflow.rect.y0 = gradient.rect.y1;
nautilus_gnome_canvas_fill_rgb (&overflow, rgb888[0], rgb888[1], rgb888[2]);
canvas_gradient_helper_v (&gradient, background->details->gradient_buffer);
return;
}
}
(background->details->gradient_is_horizontal ? canvas_gradient_helper_h : canvas_gradient_helper_v) (buf, background->details->gradient_buffer);
}
static void
drawable_gradient_helper_v (GdkDrawable *drawable, GdkGC *gc, const GdkRectangle *rect, art_u8 *gradient_buff)
{
int y;
gradient_buff += rect->y * 3;
for (y = 0; y < rect->height; ++y) {
art_u8 r = *gradient_buff++;
art_u8 g = *gradient_buff++;
art_u8 b = *gradient_buff++;
GdkColor color = {0, r << 8, g << 8, b << 8};
gdk_colormap_alloc_color (gdk_colormap_get_system (), &color, FALSE, TRUE);
gdk_gc_set_foreground (gc, &color);
gdk_draw_line (drawable, gc, 0, y, rect->width, y);
}
}
static void
drawable_gradient_helper_h (GdkDrawable *drawable, GdkGC *gc, const GdkRectangle *rect, art_u8 *gradient_buff)
{
gradient_buff += rect->x * 3;
/* We can do the fill with a single call to gdk_draw_rgb_image_dithalign
* because we pass a rowstride of zero. Zero rowstride make gradient_buff
* act like a pixbuf of infinite height - with all identical rows.
*/
gdk_draw_rgb_image_dithalign (drawable, gc, 0, 0, rect->width, rect->height, GDK_RGB_DITHER_NONE, gradient_buff, 0, 0, 0);
}
static void
fill_drawable_from_gradient_buffer (GdkDrawable *drawable, GdkGC *gc,
int drawable_x, int drawable_y,
int drawable_width, int drawable_height,
NautilusBackground *background)
{
GdkRectangle rect = {drawable_x, drawable_y, drawable_width, drawable_height};
g_return_if_fail (background->details->gradient_buffer != NULL);
/* FIXME bugzilla.eazel.com 4876: This hack is needed till we fix background
* scolling.
*
* I.e. currently you can scroll off the end of the gradient - and we
* handle this by pegging it the the last rgb value.
*
* It might be needed permanently after depending on how this is fixed.
* If we tie gradients to the boundry of icon placement (as opposed to
* window size) then when dragging an icon you might scroll off the
* end of the gradient - which will get recaluated after the drop.
*/
if (background->details->gradient_is_horizontal) {
int drawable_end = rect.x + rect.width;
if (drawable_end > background->details->gradient_num_pixels) {
art_u8 *rgb888 = background->details->gradient_buffer + (background->details->gradient_num_pixels - 1) * 3;
GdkRectangle overflow;
rect.width = rect.x < background->details->gradient_num_pixels ? background->details->gradient_num_pixels - rect.x : 0;
/* overflow is in drawable relative coords (as opposed to canvas relative) */
overflow.x = rect.width;
overflow.y = 0;
overflow.width = drawable_width - rect.width;
overflow.height = drawable_height;
nautilus_fill_rectangle_with_color (drawable, gc, &overflow, nautilus_rgb8_to_rgb (rgb888[0], rgb888[1], rgb888[2]));
}
} else {
int drawable_end = rect.y + rect.height;
if (drawable_end > background->details->gradient_num_pixels) {
art_u8 *rgb888 = background->details->gradient_buffer + (background->details->gradient_num_pixels - 1) * 3;
GdkRectangle overflow;
rect.height = rect.y < background->details->gradient_num_pixels ? background->details->gradient_num_pixels - rect.y : 0;
/* overflow is in drawable relative coords (as opposed to canvas relative) */
overflow.x = 0;
overflow.y = rect.height;
overflow.width = drawable_width;
overflow.height = drawable_height - rect.height;
nautilus_fill_rectangle_with_color (drawable, gc, &overflow, nautilus_rgb8_to_rgb (rgb888[0], rgb888[1], rgb888[2]));
}
}
(background->details->gradient_is_horizontal ? drawable_gradient_helper_h : drawable_gradient_helper_v)
(drawable, gc, &rect, background->details->gradient_buffer);
}
/* Fills in an update rect/drawable from a pixbuf by calling gdk_pixbuf_render_to_drawable
* with the minimum width/height in order to minimize overhead. I.e. this wrapper handles
* the clipping rather than sending all the data to the x-server and letting it do it.
*
* x0,y0,x1,y1 are all in canvas coords.
*/
static void
update_drawable_with_pixbuf (GdkDrawable *dst, GdkGC *gc,
int dst_x0, int dst_y0, int dst_x1, int dst_y1,
GdkPixbuf *src,
int src_x0, int src_y0, int src_x1, int src_y1)
{
if (src_x1 > dst_x0 && src_y1 > dst_y0 && src_x0 < dst_x1 && src_y0 < dst_y1) {
int src_offset_x;
int src_offset_y;
int dst_offset_x;
int dst_offset_y;
int copy_x0;
int copy_y0;
int copy_x1;
int copy_y1;
if (src_x0 > dst_x0) {
src_offset_x = 0;
dst_offset_x = src_x0 - dst_x0;
copy_x0 = src_x0;
} else {
src_offset_x = dst_x0 - src_x0;
dst_offset_x = 0;
copy_x0 = dst_x0;
}
copy_x1 = MIN (src_x1, dst_x1);
if (src_y0 > dst_y0) {
src_offset_y = 0;
dst_offset_y = src_y0 - dst_y0;
copy_y0 = src_y0;
} else {
src_offset_y = dst_y0 - src_y0;
dst_offset_y = 0;
copy_y0 = dst_y0;
}
copy_y1 = MIN (src_y1, dst_y1);
gdk_pixbuf_render_to_drawable (src, dst, gc,
src_offset_x, src_offset_y,
dst_offset_x, dst_offset_y,
copy_x1 - copy_x0, copy_y1 - copy_y0,
GDK_RGB_DITHER_NONE, 0, 0);
}
}
/* fill the canvas buffer with a tiled pixbuf */
static void
draw_pixbuf_tiled (GdkPixbuf *pixbuf, GdkDrawable *drawable, GdkGC *gc, int drawable_x, int drawable_y, int drawable_right, int drawable_bottom)
{
int x, y;
int start_x, start_y;
int tile_width, tile_height;
tile_width = gdk_pixbuf_get_width (pixbuf);
tile_height = gdk_pixbuf_get_height (pixbuf);
start_x = drawable_x - (drawable_x % tile_width);
start_y = drawable_y - (drawable_y % tile_height);
for (y = start_y; y < drawable_bottom; y += tile_height) {
for (x = start_x; x < drawable_right; x += tile_width) {
update_drawable_with_pixbuf (drawable, gc,
drawable_x, drawable_y, drawable_right, drawable_bottom,
pixbuf,
x, y, x + tile_width, y + tile_height);
}
}
}
/* Initializes a pseudo-canvas buf so canvas drawing routines can be used to draw into a pixbuf.
*/
static void
canvas_buf_from_pixbuf (GnomeCanvasBuf* buf, GdkPixbuf *pixbuf, int x, int y, int width, int height)
{
buf->buf = gdk_pixbuf_get_pixels (pixbuf);
buf->buf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
buf->rect.x0 = x;
buf->rect.y0 = y;
buf->rect.x1 = x + width;
buf->rect.y1 = y + height;
buf->bg_color = 0xFFFFFFFF;
buf->is_bg = TRUE;
buf->is_buf = FALSE;
}
static gboolean
nautilus_background_image_totally_obscures (NautilusBackground *background)
{
if (background->details->image == NULL || gdk_pixbuf_get_has_alpha (background->details->image)) {
return FALSE;
}
switch (background->details->image_placement) {
case NAUTILUS_BACKGROUND_TILED:
case NAUTILUS_BACKGROUND_SCALED:
return TRUE;
default:
g_assert_not_reached ();
/* fall through */
case NAUTILUS_BACKGROUND_CENTERED:
case NAUTILUS_BACKGROUND_SCALED_ASPECT:
/* It's possible that the image totally obscures in this case, but we don't
* have enough info to know. So we guess conservatively.
*/
return FALSE;
}
}
static void
nautilus_background_ensure_image_scaled (NautilusBackground *background, int dest_width, int dest_height)
{
if (background->details->image == NULL) {
background->details->image_rect_x = 0;
background->details->image_rect_y = 0;
background->details->image_rect_width = 0;
background->details->image_rect_height = 0;
} else if (!nautilus_background_is_image_load_in_progress (background)){
int image_width;
int image_height;
int fit_width;
int fit_height;
gboolean cur_scaled;
gboolean reload_image;
GdkPixbuf *scaled_pixbuf;
image_width = gdk_pixbuf_get_width (background->details->image);
image_height = gdk_pixbuf_get_height (background->details->image);
cur_scaled = image_width != background->details->image_width_unscaled ||
image_height != background->details->image_height_unscaled;
reload_image = FALSE;
scaled_pixbuf = NULL;
switch (background->details->image_placement) {
case NAUTILUS_BACKGROUND_TILED:
case NAUTILUS_BACKGROUND_CENTERED:
reload_image = cur_scaled;
break;
case NAUTILUS_BACKGROUND_SCALED:
if (image_width != dest_width || image_height != dest_height) {
if (cur_scaled) {
reload_image = TRUE;
} else {
scaled_pixbuf = gdk_pixbuf_scale_simple (background->details->image, dest_width, dest_height, GDK_INTERP_BILINEAR);
gdk_pixbuf_unref (background->details->image);
background->details->image = scaled_pixbuf;
image_width = gdk_pixbuf_get_width (scaled_pixbuf);
image_height = gdk_pixbuf_get_height (scaled_pixbuf);
}
}
break;
case NAUTILUS_BACKGROUND_SCALED_ASPECT:
nautilus_gdk_scale_to_fit_factor (background->details->image_width_unscaled,
background->details->image_height_unscaled,
dest_width, dest_height,
&fit_width, &fit_height);
if (image_width != fit_width || image_height != fit_height) {
if (cur_scaled) {
reload_image = TRUE;
} else {
scaled_pixbuf = nautilus_gdk_pixbuf_scale_to_fit (background->details->image, dest_width, dest_height);
gdk_pixbuf_unref (background->details->image);
background->details->image = scaled_pixbuf;
image_width = gdk_pixbuf_get_width (scaled_pixbuf);
image_height = gdk_pixbuf_get_height (scaled_pixbuf);
}
}
break;
}
if (reload_image) {
gdk_pixbuf_unref (background->details->image);
background->details->image = NULL;
nautilus_background_start_loading_image (background, TRUE);
background->details->image_rect_x = 0;
background->details->image_rect_y = 0;
background->details->image_rect_width = 0;
background->details->image_rect_height = 0;
} else if (background->details->image_placement == NAUTILUS_BACKGROUND_TILED) {
background->details->image_rect_x = 0;
background->details->image_rect_y = 0;
background->details->image_rect_width = dest_width;
background->details->image_rect_height = dest_height;
} else {
background->details->image_rect_x = (dest_width - image_width) / 2;
background->details->image_rect_y = (dest_height - image_height) / 2;
background->details->image_rect_width = image_width;
background->details->image_rect_height = image_height;
}
}
}
void
nautilus_background_pre_draw (NautilusBackground *background, int entire_width, int entire_height)
{
nautilus_background_ensure_image_scaled (background, entire_width, entire_height);
nautilus_background_ensure_gradient_buffered (background, entire_width, entire_height);
}
/* This routine is for gdk style rendering, which doesn't naturally
* support transparency, so we draw into a pixbuf offscreen if
* necessary.
*/
void
nautilus_background_draw (NautilusBackground *background,
GdkDrawable *drawable, GdkGC *gc,
int drawable_x, int drawable_y,
int drawable_width, int drawable_height)
{
int drawable_right;
int drawable_bottom;
int image_rect_right;
int image_rect_bottom;
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
/* Combine mode is currently used only by the sidebar. It allocates a pixbuf
* on every draw, so further spread of its use should not be encouraged.
*
* Combine mode allows the sidebar, regardless of aa mode, to alpha composite
* an image over a color (an effect utilized by the sidebar in some themes)
* and avoid striations in gradients by using dithering.
*
* FIXME bugzila.eazel.com 5516:
* The whole combine mode concept could be elimintated by some minor refactoring that
* would basically move the code below to a place used only by nautilus_background_draw_flat_box.
* Also, the various pieces of code that manage the combine setting could be elimintated
* from nautilus-sidebar and nautilus-directory-background.
*/
if (background->details->combine_mode) {
GdkPixbuf *pixbuf;
GnomeCanvasBuf buffer;
/* allocate a pixbuf the size of the rectangle */
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, drawable_width, drawable_height);
/* contrive a CanvasBuf structure to point to it */
canvas_buf_from_pixbuf (&buffer, pixbuf, drawable_x, drawable_y, drawable_width, drawable_height);
/* invoke the anti-aliased code to do the work */
nautilus_background_draw_aa (background, &buffer);
/* blit the pixbuf to the drawable */
gdk_pixbuf_render_to_drawable (pixbuf, drawable, gc,
0, 0,
0, 0,
drawable_width, drawable_height,
GDK_RGB_DITHER_MAX, 0, 0);
/* free things up and we're done */
gdk_pixbuf_unref (pixbuf);
return;
}
drawable_right = drawable_x + drawable_width;
drawable_bottom = drawable_y + drawable_height;
image_rect_right = background->details->image_rect_x + background->details->image_rect_width;
image_rect_bottom = background->details->image_rect_y + background->details->image_rect_height;
if (!background->details->image ||
drawable_x < background->details->image_rect_x ||
drawable_y < background->details->image_rect_y ||
drawable_right > image_rect_right ||
drawable_bottom > image_rect_bottom) {
if (background->details->is_solid_color) {
GdkRectangle rect = {0 , 0, drawable_width, drawable_height};
nautilus_fill_rectangle_with_color (drawable, gc, &rect, nautilus_gdk_color_to_rgb (&background->details->solid_color));
} else {
fill_drawable_from_gradient_buffer (drawable, gc, drawable_x, drawable_y, drawable_width, drawable_height, background);
}
}
if (background->details->image != NULL) {
switch (background->details->image_placement) {
case NAUTILUS_BACKGROUND_TILED:
draw_pixbuf_tiled (background->details->image, drawable, gc, drawable_x, drawable_y, drawable_right, drawable_bottom);
break;
case NAUTILUS_BACKGROUND_CENTERED:
case NAUTILUS_BACKGROUND_SCALED:
case NAUTILUS_BACKGROUND_SCALED_ASPECT:
/* Since the image has already been scaled, all these cases can be treated identically.
*/
update_drawable_with_pixbuf (drawable, gc,
drawable_x, drawable_y,
drawable_right, drawable_bottom,
background->details->image,
background->details->image_rect_x, background->details->image_rect_y,
image_rect_right, image_rect_bottom);
break;
}
}
}
void
nautilus_background_draw_to_drawable (NautilusBackground *background,
GdkDrawable *drawable, GdkGC *gc,
int drawable_x, int drawable_y,
int drawable_width, int drawable_height,
int entire_width, int entire_height)
{
nautilus_background_pre_draw (background, entire_width, entire_height);
nautilus_background_draw (background, drawable, gc, drawable_x, drawable_y, drawable_width, drawable_height);
}
void
nautilus_background_draw_to_pixbuf (NautilusBackground *background,
GdkPixbuf *pixbuf,
int pixbuf_x,
int pixbuf_y,
int pixbuf_width,
int pixbuf_height,
int entire_width,
int entire_height)
{
GnomeCanvasBuf fake_buffer;
g_return_if_fail (background != NULL);
g_return_if_fail (pixbuf != NULL);
canvas_buf_from_pixbuf (&fake_buffer, pixbuf, pixbuf_x, pixbuf_y, pixbuf_width, pixbuf_height);
nautilus_background_draw_to_canvas (background,
&fake_buffer,
entire_width,
entire_height);
}
/* fill the canvas buffer with a tiled pixbuf */
static void
draw_pixbuf_tiled_aa (GdkPixbuf *pixbuf, GnomeCanvasBuf *buffer)
{
int x, y;
int start_x, start_y;
int tile_width, tile_height;
tile_width = gdk_pixbuf_get_width (pixbuf);
tile_height = gdk_pixbuf_get_height (pixbuf);
start_x = buffer->rect.x0 - (buffer->rect.x0 % tile_width);
start_y = buffer->rect.y0 - (buffer->rect.y0 % tile_height);
for (y = start_y; y < buffer->rect.y1; y += tile_height) {
for (x = start_x; x < buffer->rect.x1; x += tile_width) {
nautilus_gnome_canvas_draw_pixbuf (buffer, pixbuf, x, y);
}
}
}
/* draw the background on the anti-aliased canvas */
void
nautilus_background_draw_aa (NautilusBackground *background, GnomeCanvasBuf *buffer)
{
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
/* If the image has alpha - we always draw the gradient behind it.
* In principle, we could do better by having already drawn gradient behind
* the scaled image. However, this would add a significant amount of
* complexity to our image scaling/caching logic. I.e. it would tie the
* scaled image to a location on the screen because it holds a gradient.
* This is especially problematic for tiled images with alpha.
*/
if (!background->details->image ||
gdk_pixbuf_get_has_alpha (background->details->image) ||
buffer->rect.x0 < background->details->image_rect_x ||
buffer->rect.y0 < background->details->image_rect_y ||
buffer->rect.x1 > (background->details->image_rect_x + background->details->image_rect_width) ||
buffer->rect.y1 > (background->details->image_rect_y + background->details->image_rect_height)) {
if (background->details->is_solid_color) {
nautilus_gnome_canvas_fill_rgb (buffer,
background->details->solid_color.red >> 8,
background->details->solid_color.green >> 8,
background->details->solid_color.blue >> 8);
} else {
fill_canvas_from_gradient_buffer (buffer, background);
}
}
if (background->details->image != NULL) {
switch (background->details->image_placement) {
case NAUTILUS_BACKGROUND_TILED:
draw_pixbuf_tiled_aa (background->details->image, buffer);
break;
default:
g_assert_not_reached ();
/* fall through */
case NAUTILUS_BACKGROUND_CENTERED:
case NAUTILUS_BACKGROUND_SCALED:
case NAUTILUS_BACKGROUND_SCALED_ASPECT:
/* Since the image has already been scaled, all these cases
* can be treated identically.
*/
nautilus_gnome_canvas_draw_pixbuf (buffer,
background->details->image,
background->details->image_rect_x,
background->details->image_rect_y);
break;
}
}
buffer->is_bg = FALSE;
buffer->is_buf = TRUE;
}
void
nautilus_background_draw_to_canvas (NautilusBackground *background,
GnomeCanvasBuf *buffer,
int entire_width,
int entire_height)
{
nautilus_background_pre_draw (background, entire_width, entire_height);
nautilus_background_draw_aa (background, buffer);
}
char *
nautilus_background_get_color (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), NULL);
return g_strdup (background->details->color);
}
char *
nautilus_background_get_image_uri (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), NULL);
return g_strdup (background->details->image_uri);
}
static gboolean
nautilus_background_set_color_no_emit (NautilusBackground *background,
const char *color)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
if (nautilus_strcmp (background->details->color, color) == 0) {
return FALSE;
}
g_free (background->details->color);
background->details->color = g_strdup (color);
reset_cached_color_info (background);
return TRUE;
}
void
nautilus_background_set_color (NautilusBackground *background,
const char *color)
{
if (nautilus_background_set_color_no_emit (background, color)) {
gtk_signal_emit (GTK_OBJECT (background), signals[SETTINGS_CHANGED]);
if (!nautilus_background_image_totally_obscures (background)) {
gtk_signal_emit (GTK_OBJECT (background), signals[APPEARANCE_CHANGED]);
}
}
}
static void
nautilus_background_load_image_callback (GnomeVFSResult error,
GdkPixbuf *pixbuf,
gpointer callback_data)
{
NautilusBackground *background;
background = NAUTILUS_BACKGROUND (callback_data);
background->details->load_image_handle = NULL;
nautilus_background_remove_current_image (background);
/* Just ignore errors. */
if (pixbuf != NULL) {
gdk_pixbuf_ref (pixbuf);
background->details->image = pixbuf;
background->details->image_width_unscaled = gdk_pixbuf_get_width (pixbuf);
background->details->image_height_unscaled = gdk_pixbuf_get_height (pixbuf);
}
gtk_signal_emit (GTK_OBJECT (background), signals[IMAGE_LOADING_DONE], pixbuf != NULL || background->details->image_uri == NULL);
if (background->details->emit_after_load) {
gtk_signal_emit (GTK_OBJECT (background), signals[APPEARANCE_CHANGED]);
}
}
static gboolean
nautilus_background_is_image_load_in_progress (NautilusBackground *background)
{
return background->details->load_image_handle != NULL;
}
static void
nautilus_background_cancel_loading_image (NautilusBackground *background)
{
if (nautilus_background_is_image_load_in_progress (background)) {
nautilus_cancel_gdk_pixbuf_load (background->details->load_image_handle);
background->details->load_image_handle = NULL;
gtk_signal_emit (GTK_OBJECT (background), signals[IMAGE_LOADING_DONE], FALSE);
}
}
static void
nautilus_background_start_loading_image (NautilusBackground *background, gboolean emit_appearance_change)
{
background->details->emit_after_load = emit_appearance_change;
if (background->details->image_uri != NULL) {
background->details->load_image_handle = nautilus_gdk_pixbuf_load_async (background->details->image_uri,
nautilus_background_load_image_callback,
background);
} else {
nautilus_background_load_image_callback (0, NULL, background);
}
}
static gboolean
nautilus_background_set_image_uri_helper (NautilusBackground *background,
const char *image_uri,
gboolean emit_setting_change,
gboolean emit_appearance_change)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
if (nautilus_strcmp (background->details->image_uri, image_uri) == 0) {
return FALSE;
}
nautilus_background_cancel_loading_image (background);
g_free (background->details->image_uri);
background->details->image_uri = g_strdup (image_uri);
/* We do not get rid of the current image here. This gets done after the new
* image loads - in nautilus_background_load_image_callback. This way the
* current image can be used if an update is needed before the load completes.
*/
nautilus_background_start_loading_image (background, emit_appearance_change);
if (emit_setting_change) {
gtk_signal_emit (GTK_OBJECT (background), signals[SETTINGS_CHANGED]);
}
return TRUE;
}
void
nautilus_background_set_image_uri (NautilusBackground *background, const char *image_uri)
{
nautilus_background_set_image_uri_helper (background, image_uri, TRUE, TRUE);
}
static void
set_image_and_color_image_loading_done_callback (NautilusBackground *background, gboolean successful_load, char *color)
{
gtk_signal_disconnect_by_func (GTK_OBJECT (background), GTK_SIGNAL_FUNC (set_image_and_color_image_loading_done_callback), (gpointer) color);
nautilus_background_set_color_no_emit (background, color);
g_free (color);
/* We always emit , even if the color didn't change, because the image change
* relies on us doing it here.
*/
gtk_signal_emit (GTK_OBJECT (background), signals[SETTINGS_CHANGED]);
gtk_signal_emit (GTK_OBJECT (background), signals[APPEARANCE_CHANGED]);
}
/* Use this fn to set both the image and color and avoid flash. The color isn't
* changed till after the image is done loading, that way if an update occurs
* before then, it will use the old color and image.
*/
static void
nautilus_background_set_image_uri_and_color (NautilusBackground *background, const char *image_uri, const char *color)
{
char *color_copy;
if (nautilus_strcmp (background->details->color, color) == 0 &&
nautilus_strcmp (background->details->image_uri, image_uri) == 0) {
return;
}
color_copy = g_strdup (color);
gtk_signal_connect (GTK_OBJECT (background),
"image_loading_done",
GTK_SIGNAL_FUNC (set_image_and_color_image_loading_done_callback),
(gpointer) color_copy);
/* set_image_and_color_image_loading_done_callback must always be called
* because we rely on it to:
* - disconnect the image_loading_done signal handler
* - emit SETTINGS_CHANGED & APPEARANCE_CHANGED
* - free color_copy
* - prevent the common cold
*/
/* We use nautilus_background_set_image_uri_helper because its
* return value (if false) tells us whether or not we need to
* call set_image_and_color_image_loading_done_callback ourselves.
*/
if (!nautilus_background_set_image_uri_helper (background, image_uri, FALSE, FALSE)) {
set_image_and_color_image_loading_done_callback (background, TRUE, color_copy);
}
}
void
nautilus_background_receive_dropped_background_image (NautilusBackground *background,
const char *image_uri)
{
/* Special case the reset-background image by file name. */
if (nautilus_str_has_suffix (image_uri, "/" RESET_BACKGROUND_MAGIC_IMAGE_NAME)) {
nautilus_background_reset (background);
} else {
/* Currently, we only support tiled images. So we set the placement.
* We rely on nautilus_background_set_image_uri_and_color to emit
* the SETTINGS_CHANGED & APPEARANCE_CHANGE signals.
*/
nautilus_background_set_image_placement_no_emit (background, NAUTILUS_BACKGROUND_TILED);
nautilus_background_set_image_uri_and_color (background, image_uri, NULL);
}
}
static GtkStyleClass *
nautilus_gtk_style_get_default_class (void)
{
static GtkStyleClass *default_class;
GtkStyle *style;
if (default_class == NULL) {
style = gtk_style_new ();
default_class = style->klass;
gtk_style_unref (style);
}
return default_class;
}
static void
nautilus_gdk_window_update_sizes (GdkWindow *window, int *width, int *height)
{
g_return_if_fail (window != NULL);
g_return_if_fail (width != NULL);
g_return_if_fail (height != NULL);
if (*width == -1 && *height == -1) {
gdk_window_get_size (window, width, height);
} else if (*width == -1) {
gdk_window_get_size (window, width, NULL);
} else if (*height == -1) {
gdk_window_get_size (window, NULL, height);
}
}
static void
nautilus_background_draw_flat_box (GtkStyle *style,
GdkWindow *window,
GtkStateType state_type,
GtkShadowType shadow_type,
GdkRectangle *area,
GtkWidget *widget,
char *detail,
int x,
int y,
int width,
int height)
{
gboolean call_parent;
NautilusBackground *background;
GdkGC *gc;
call_parent = TRUE;
background = NULL;
if (state_type == GTK_STATE_NORMAL) {
background = nautilus_get_widget_background (widget);
if (background != NULL) {
call_parent = FALSE;
}
}
if (call_parent) {
(* nautilus_gtk_style_get_default_class()->draw_flat_box)
(style, window, state_type, shadow_type, area, widget,
detail, x, y, width, height);
return;
}
gc = style->bg_gc[state_type];
if (area)
gdk_gc_set_clip_rectangle (gc, area);
nautilus_gdk_window_update_sizes (window, &width, &height);
nautilus_background_draw_to_drawable (background, window, gc, 0, 0, width, height, widget->allocation.width, widget->allocation.height);
if (area)
gdk_gc_set_clip_rectangle (gc, NULL);
}
static GtkStyleClass *
nautilus_background_get_gtk_style_class (void)
{
static GtkStyleClass *klass;
if (klass == NULL) {
static GtkStyleClass klass_storage;
klass = &klass_storage;
*klass = *nautilus_gtk_style_get_default_class ();
klass->draw_flat_box = nautilus_background_draw_flat_box;
}
return klass;
}
static void
nautilus_background_set_widget_style (NautilusBackground *background,
GtkWidget *widget)
{
GtkStyle *style;
char *start_color_spec;
GdkColor color;
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
g_return_if_fail (GTK_IS_WIDGET (widget));
style = gtk_widget_get_style (widget);
/* Make a copy of the style. */
style = gtk_style_copy (style);
/* Give it the special class that allows it to draw gradients. */
style->klass = nautilus_background_get_gtk_style_class ();
/* Set up the colors in the style. */
start_color_spec = nautilus_gradient_get_start_color_spec (background->details->color);
nautilus_gdk_color_parse_with_white_default (start_color_spec, &color);
g_free (start_color_spec);
style->bg[GTK_STATE_NORMAL] = color;
style->base[GTK_STATE_NORMAL] = color;
style->bg[GTK_STATE_ACTIVE] = color;
style->base[GTK_STATE_ACTIVE] = color;
/* Put the style in the widget. */
gtk_widget_set_style (widget, style);
gtk_style_unref (style);
}
/**
* nautilus_background_is_set:
*
* Check whether the background's color or image has been set.
*/
gboolean
nautilus_background_is_set (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
return background->details->color != NULL
|| background->details->image_uri != NULL;
}
/* Returns false if the image is still loading, true
* if it's done loading or there is no image.
*/
gboolean
nautilus_background_is_loaded (NautilusBackground *background)
{
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
return background->details->image_uri == NULL ||
(!nautilus_background_is_image_load_in_progress (background) && background->details->image != NULL);
}
/**
* nautilus_background_reset:
*
* Emit the reset signal to forget any color or image that has been
* set previously.
*/
void
nautilus_background_reset (NautilusBackground *background)
{
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
gtk_signal_emit (GTK_OBJECT (background), signals[RESET]);
}
static void
nautilus_background_set_up_canvas (GtkWidget *widget)
{
if (GNOME_IS_CANVAS (widget)) {
nautilus_background_canvas_group_supplant_root_class (GNOME_CANVAS (widget));
}
}
static void
nautilus_widget_background_changed (GtkWidget *widget, NautilusBackground *background)
{
nautilus_background_set_widget_style (background, widget);
nautilus_background_set_up_canvas (widget);
gtk_widget_queue_clear (widget);
}
/* Gets the background attached to a widget.
If the widget doesn't already have a NautilusBackground object,
this will create one. To change the widget's background, you can
just call nautilus_background methods on the widget.
Later, we might want a call to find out if we already have a background,
or a way to share the same background among multiple widgets; both would
be straightforward.
*/
NautilusBackground *
nautilus_get_widget_background (GtkWidget *widget)
{
gpointer data;
NautilusBackground *background;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
/* Check for an existing background. */
data = gtk_object_get_data (GTK_OBJECT (widget), "nautilus_background");
if (data != NULL) {
g_assert (NAUTILUS_IS_BACKGROUND (data));
return data;
}
/* Store the background in the widget's data. */
background = nautilus_background_new ();
gtk_object_ref (GTK_OBJECT (background));
gtk_object_sink (GTK_OBJECT (background));
gtk_object_set_data_full (GTK_OBJECT (widget), "nautilus_background",
background, (GtkDestroyNotify) gtk_object_unref);
/* Arrange to get the signal whenever the background changes. */
gtk_signal_connect_object_while_alive (GTK_OBJECT (background),
"appearance_changed",
nautilus_widget_background_changed,
GTK_OBJECT (widget));
nautilus_widget_background_changed (widget, background);
return background;
}
gboolean
nautilus_widget_has_attached_background (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), FALSE);
return gtk_object_get_data (GTK_OBJECT (widget), "nautilus_background") != NULL;
}
GtkWidget *
nautilus_gtk_widget_find_background_ancestor (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
while (widget != NULL) {
if (nautilus_widget_has_attached_background (widget)) {
return widget;
}
widget = widget->parent;
}
return NULL;
}
gboolean
nautilus_background_is_too_complex_for_gtk_style (NautilusBackground *background)
{
if (background == NULL) {
return FALSE;
}
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
if (background->details->image_uri != NULL) {
return TRUE;
}
if (!background->details->is_solid_color) {
return TRUE;
}
return FALSE;
}
/* determine if a background is darker or lighter than average, to help clients know what
colors to draw on top with */
gboolean
nautilus_background_is_dark (NautilusBackground *background)
{
GdkColor color;
int intensity, intensity2;
char *start_color_spec, *end_color_spec;
g_return_val_if_fail (NAUTILUS_IS_BACKGROUND (background), FALSE);
if (background->details->image != NULL) {
nautilus_gdk_pixbuf_average_value (background->details->image, &color);
} else if (background->details->is_solid_color) {
nautilus_gdk_color_parse_with_white_default (background->details->color, &color);
} else {
start_color_spec = nautilus_gradient_get_start_color_spec (background->details->color);
end_color_spec = nautilus_gradient_get_end_color_spec (background->details->color);
nautilus_gdk_color_parse_with_white_default (start_color_spec, &color);
intensity = (((color.red >> 8) * 77) + ((color.green >> 8) * 150) + ((color.blue >> 8) * 28)) >> 8;
nautilus_gdk_color_parse_with_white_default (end_color_spec, &color);
intensity2 = (((color.red >> 8) * 77) + ((color.green >> 8) * 150) + ((color.blue >> 8) * 28)) >> 8;
g_free (start_color_spec);
g_free (end_color_spec);
return (intensity + intensity2) < 320;
}
intensity = (((color.red >> 8) * 77) + ((color.green >> 8) * 150) + ((color.blue >> 8) * 28)) >> 8;
return intensity < 160; /* biased slightly to be dark */
}
/* handle dropped colors */
void
nautilus_background_receive_dropped_color (NautilusBackground *background,
GtkWidget *widget,
int drop_location_x,
int drop_location_y,
const GtkSelectionData *selection_data)
{
guint16 *channels;
char *color_spec;
char *new_gradient_spec;
int left_border, right_border, top_border, bottom_border;
g_return_if_fail (NAUTILUS_IS_BACKGROUND (background));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (selection_data != NULL);
/* Convert the selection data into a color spec. */
if (selection_data->length != 8 || selection_data->format != 16) {
g_warning ("received invalid color data");
return;
}
channels = (guint16 *) selection_data->data;
color_spec = g_strdup_printf ("rgb:%04hX/%04hX/%04hX", channels[0], channels[1], channels[2]);
/* Figure out if the color was dropped close enough to an edge to create a gradient.
For the moment, this is hard-wired, but later the widget will have to have some
say in where the borders are.
*/
left_border = 32;
right_border = widget->allocation.width - 32;
top_border = 32;
bottom_border = widget->allocation.height - 32;
if (drop_location_x < left_border && drop_location_x <= right_border) {
new_gradient_spec = nautilus_gradient_set_left_color_spec (background->details->color, color_spec);
} else if (drop_location_x >= left_border && drop_location_x > right_border) {
new_gradient_spec = nautilus_gradient_set_right_color_spec (background->details->color, color_spec);
} else if (drop_location_y < top_border && drop_location_y <= bottom_border) {
new_gradient_spec = nautilus_gradient_set_top_color_spec (background->details->color, color_spec);
} else if (drop_location_y >= top_border && drop_location_y > bottom_border) {
new_gradient_spec = nautilus_gradient_set_bottom_color_spec (background->details->color, color_spec);
} else {
new_gradient_spec = g_strdup (color_spec);
}
g_free (color_spec);
nautilus_background_set_image_uri_and_color (background, NULL, new_gradient_spec);
g_free (new_gradient_spec);
}
/* self check code */
#if !defined (NAUTILUS_OMIT_SELF_CHECK)
void
nautilus_self_check_background (void)
{
NautilusBackground *background;
background = nautilus_background_new ();
nautilus_background_set_color (background, NULL);
nautilus_background_set_color (background, "");
nautilus_background_set_color (background, "red");
nautilus_background_set_color (background, "red-blue");
nautilus_background_set_color (background, "red-blue:h");
gtk_object_unref (GTK_OBJECT (background));
}
#endif /* !NAUTILUS_OMIT_SELF_CHECK */
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