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Gimp/app/widgets/gimpfgbgeditor.c
Jehan d4733e5b21 app: fix drag'n drop of fg/bg colors under Wayland. 
Commit 086ae77929 had broken dnd of colors from toolbox's color area on
Wayland. Clearly Wayland did not like we changed focus on a click,
breaking the drag.

To fix this, do not propagate button press and release events from the
GimpFgBgEditor editor anymore. Yet, since changing colors is usually to
be used (often immediately) on the canvas, giving back the focus to
canvas still makes sense. Therefore, instead of using press/release
events, add semantic signals to GimpFgBgEditor: color-dropped,
colors-swapped and colors-default (additionally to already existing
color-clicked). Then connect to these new signals to grab focus for
canvas when relevant.

Thanks to Massimo for raising the broken color dnd feature.
2021-09-26 19:06:26 +02:00

940 lines
32 KiB
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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpfgbgeditor.c
* Copyright (C) 2004 Michael Natterer <mitch@gimp.org>
*
* 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 3 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "config/gimpcoreconfig.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "core/gimpimage.h"
#include "core/gimpimage-colormap.h"
#include "core/gimpmarshal.h"
#include "core/gimppalette.h"
#include "gimpdnd.h"
#include "gimpfgbgeditor.h"
#include "gimpwidgets-utils.h"
#define CHANNEL_EPSILON 1e-3
enum
{
PROP_0,
PROP_CONTEXT,
PROP_ACTIVE_COLOR
};
enum
{
COLOR_CLICKED,
COLOR_DROPPED,
COLORS_SWAPPED,
COLORS_DEFAULT,
TOOLTIP,
LAST_SIGNAL
};
static void gimp_fg_bg_editor_dispose (GObject *object);
static void gimp_fg_bg_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_fg_bg_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static GtkSizeRequestMode
gimp_fg_bg_editor_get_request_mode (GtkWidget *widget);
static void
gimp_fg_bg_editor_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static void gimp_fg_bg_editor_style_updated (GtkWidget *widget);
static gboolean gimp_fg_bg_editor_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean gimp_fg_bg_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_fg_bg_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_fg_bg_editor_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean gimp_fg_bg_editor_query_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip);
static void gimp_fg_bg_editor_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data);
static void gimp_fg_bg_editor_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data);
static void gimp_fg_bg_editor_create_transform (GimpFgBgEditor *editor);
static void gimp_fg_bg_editor_destroy_transform (GimpFgBgEditor *editor);
static void gimp_fg_bg_editor_image_changed (GimpFgBgEditor *editor,
GimpImage *image);
static void gimp_fg_bg_editor_draw_color_frame (GimpFgBgEditor *editor,
cairo_t *cr,
const GimpRGB *color,
gint x,
gint y,
gint width,
gint height,
gint corner_dx,
gint corner_dy);
G_DEFINE_TYPE (GimpFgBgEditor, gimp_fg_bg_editor, GTK_TYPE_EVENT_BOX)
#define parent_class gimp_fg_bg_editor_parent_class
static guint editor_signals[LAST_SIGNAL] = { 0 };
static void
gimp_fg_bg_editor_class_init (GimpFgBgEditorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
editor_signals[COLOR_CLICKED] =
g_signal_new ("color-clicked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpFgBgEditorClass, color_clicked),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
GIMP_TYPE_ACTIVE_COLOR);
editor_signals[COLOR_DROPPED] =
g_signal_new ("color-dropped",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpFgBgEditorClass, color_dropped),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
GIMP_TYPE_ACTIVE_COLOR);
editor_signals[COLORS_SWAPPED] =
g_signal_new ("colors-swapped",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpFgBgEditorClass, colors_swapped),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
editor_signals[COLORS_DEFAULT] =
g_signal_new ("colors-default",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpFgBgEditorClass, colors_default),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
editor_signals[TOOLTIP] =
g_signal_new ("tooltip",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpFgBgEditorClass, tooltip),
NULL, NULL,
gimp_marshal_VOID__INT_OBJECT,
G_TYPE_NONE, 2,
G_TYPE_INT,
GTK_TYPE_TOOLTIP);
object_class->dispose = gimp_fg_bg_editor_dispose;
object_class->set_property = gimp_fg_bg_editor_set_property;
object_class->get_property = gimp_fg_bg_editor_get_property;
widget_class->get_request_mode = gimp_fg_bg_editor_get_request_mode;
widget_class->get_preferred_width_for_height = gimp_fg_bg_editor_get_preferred_width_for_height;
widget_class->style_updated = gimp_fg_bg_editor_style_updated;
widget_class->draw = gimp_fg_bg_editor_draw;
widget_class->button_press_event = gimp_fg_bg_editor_button_press;
widget_class->button_release_event = gimp_fg_bg_editor_button_release;
widget_class->drag_motion = gimp_fg_bg_editor_drag_motion;
widget_class->query_tooltip = gimp_fg_bg_editor_query_tooltip;
g_object_class_install_property (object_class, PROP_CONTEXT,
g_param_spec_object ("context",
NULL, NULL,
GIMP_TYPE_CONTEXT,
GIMP_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_ACTIVE_COLOR,
g_param_spec_enum ("active-color",
NULL, NULL,
GIMP_TYPE_ACTIVE_COLOR,
GIMP_ACTIVE_COLOR_FOREGROUND,
GIMP_PARAM_READWRITE));
gtk_widget_class_set_css_name (widget_class, "GimpFgBgEditor");
}
static void
gimp_fg_bg_editor_init (GimpFgBgEditor *editor)
{
editor->active_color = GIMP_ACTIVE_COLOR_FOREGROUND;
gtk_widget_set_can_focus (GTK_WIDGET (editor), FALSE);
gtk_event_box_set_visible_window (GTK_EVENT_BOX (editor), FALSE);
gtk_widget_add_events (GTK_WIDGET (editor),
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK);
gimp_dnd_color_source_add (GTK_WIDGET (editor),
gimp_fg_bg_editor_drag_color, NULL);
gimp_dnd_color_dest_add (GTK_WIDGET (editor),
gimp_fg_bg_editor_drop_color, NULL);
gimp_widget_track_monitor (GTK_WIDGET (editor),
G_CALLBACK (gimp_fg_bg_editor_destroy_transform),
NULL, NULL);
gtk_widget_set_size_request (GTK_WIDGET (editor), 32, 24);
}
static void
gimp_fg_bg_editor_dispose (GObject *object)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
if (editor->context)
gimp_fg_bg_editor_set_context (editor, NULL);
g_clear_object (&editor->default_icon);
g_clear_object (&editor->swap_icon);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_fg_bg_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
switch (property_id)
{
case PROP_CONTEXT:
gimp_fg_bg_editor_set_context (editor, g_value_get_object (value));
break;
case PROP_ACTIVE_COLOR:
gimp_fg_bg_editor_set_active (editor, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_fg_bg_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (object);
switch (property_id)
{
case PROP_CONTEXT:
g_value_set_object (value, editor->context);
break;
case PROP_ACTIVE_COLOR:
g_value_set_enum (value, editor->active_color);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static GtkSizeRequestMode
gimp_fg_bg_editor_get_request_mode (GtkWidget *widget)
{
return GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT;
}
static void
gimp_fg_bg_editor_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
*minimum_width = height;
*natural_width = height;
}
static void
gimp_fg_bg_editor_style_updated (GtkWidget *widget)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
GTK_WIDGET_CLASS (parent_class)->style_updated (widget);
g_clear_object (&editor->default_icon);
g_clear_object (&editor->swap_icon);
}
static gboolean
gimp_fg_bg_editor_draw (GtkWidget *widget,
cairo_t *cr)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
GtkStyleContext *style = gtk_widget_get_style_context (widget);
GtkBorder border;
GtkBorder padding;
GdkRectangle rect;
gint scale_factor;
gint width, height;
gint default_w, default_h;
gint swap_w, swap_h;
GimpRGB color;
gtk_style_context_save (style);
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_get_border (style, gtk_style_context_get_state (style),
&border);
gtk_style_context_get_padding (style, gtk_style_context_get_state (style),
&padding);
border.left += padding.left;
border.right += padding.right;
border.top += padding.top;
border.bottom += padding.bottom;
scale_factor = gtk_widget_get_scale_factor (widget);
/* draw the default colors pixbuf */
if (! editor->default_icon)
editor->default_icon = gimp_widget_load_icon (widget,
GIMP_ICON_COLORS_DEFAULT, 12);
default_w = gdk_pixbuf_get_width (editor->default_icon) / scale_factor;
default_h = gdk_pixbuf_get_height (editor->default_icon) / scale_factor;
if (default_w < width / 2 && default_h < height / 2)
{
cairo_surface_t *surface;
surface = gdk_cairo_surface_create_from_pixbuf (editor->default_icon,
scale_factor, NULL);
cairo_set_source_surface (cr, surface,
border.left,
height - border.bottom - default_h);
cairo_surface_destroy (surface);
cairo_paint (cr);
}
else
{
default_w = default_h = 0;
}
/* draw the swap colors pixbuf */
if (! editor->swap_icon)
editor->swap_icon = gimp_widget_load_icon (widget,
GIMP_ICON_COLORS_SWAP, 12);
swap_w = gdk_pixbuf_get_width (editor->swap_icon) / scale_factor;
swap_h = gdk_pixbuf_get_height (editor->swap_icon) / scale_factor;
if (swap_w < width / 2 && swap_h < height / 2)
{
cairo_surface_t *surface;
surface = gdk_cairo_surface_create_from_pixbuf (editor->swap_icon,
scale_factor, NULL);
cairo_set_source_surface (cr, surface,
width - border.right - swap_w,
border.top);
cairo_surface_destroy (surface);
cairo_paint (cr);
}
else
{
swap_w = swap_h = 0;
}
rect.width = width - MAX (default_w, swap_w) - 4 - border.top - border.bottom;
rect.height = height - MAX (default_h, swap_h) - 2 - border.left - border.right;
if (rect.height > (height * 3 / 4))
rect.width = MAX (rect.width - (rect.height - ((height * 3 / 4))),
width * 2 / 3);
editor->rect_width = rect.width;
editor->rect_height = rect.height;
if (! editor->transform)
gimp_fg_bg_editor_create_transform (editor);
if (editor->context)
{
/* draw the background frame */
gimp_context_get_background (editor->context, &color);
rect.x = width - rect.width - border.right;
rect.y = height - rect.height - border.bottom;
gimp_fg_bg_editor_draw_color_frame (editor, cr, &color,
rect.x, rect.y,
rect.width, rect.height,
-1, -1);
/* draw the foreground frame */
gimp_context_get_foreground (editor->context, &color);
rect.x = border.left;
rect.y = border.top;
gimp_fg_bg_editor_draw_color_frame (editor, cr, &color,
rect.x, rect.y,
rect.width, rect.height,
+1, +1);
}
gtk_style_context_restore (style);
return TRUE;
}
static GimpFgBgTarget
gimp_fg_bg_editor_target (GimpFgBgEditor *editor,
gint x,
gint y)
{
GtkWidget *widget = GTK_WIDGET (editor);
GtkStyleContext *style = gtk_widget_get_style_context (widget);
GtkBorder border;
GtkBorder padding;
gint width;
gint height;
gint rect_w = editor->rect_width;
gint rect_h = editor->rect_height;
gint button_width;
gint button_height;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_get_border (style, gtk_style_context_get_state (style),
&border);
gtk_style_context_get_padding (style, gtk_style_context_get_state (style),
&padding);
border.left += padding.left;
border.right += padding.right;
border.top += padding.top;
border.bottom += padding.bottom;
button_width = width - border.left - border.right - rect_w;
button_height = height - border.top - border.bottom - rect_h;
if (x > border.left &&
x < border.left + rect_w &&
y > border.top &&
y < border.top + rect_h)
{
return GIMP_FG_BG_TARGET_FOREGROUND;
}
else if (x > width - border.right - rect_w &&
x < width - border.right &&
y > height - border.bottom - rect_h &&
y < height - border.bottom)
{
return GIMP_FG_BG_TARGET_BACKGROUND;
}
else if (x > border.left &&
x < border.left + button_width &&
y > border.top + rect_h &&
y < height - border.bottom)
{
return GIMP_FG_BG_TARGET_DEFAULT;
}
else if (x > border.left + rect_w &&
x < width - border.right &&
y > border.top &&
y < border.top + button_height)
{
return GIMP_FG_BG_TARGET_SWAP;
}
return GIMP_FG_BG_TARGET_INVALID;
}
static gboolean
gimp_fg_bg_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
{
GimpFgBgTarget target = gimp_fg_bg_editor_target (editor,
bevent->x, bevent->y);
editor->click_target = GIMP_FG_BG_TARGET_INVALID;
switch (target)
{
case GIMP_FG_BG_TARGET_FOREGROUND:
if (editor->active_color != GIMP_ACTIVE_COLOR_FOREGROUND)
gimp_fg_bg_editor_set_active (editor,
GIMP_ACTIVE_COLOR_FOREGROUND);
editor->click_target = GIMP_FG_BG_TARGET_FOREGROUND;
break;
case GIMP_FG_BG_TARGET_BACKGROUND:
if (editor->active_color != GIMP_ACTIVE_COLOR_BACKGROUND)
gimp_fg_bg_editor_set_active (editor,
GIMP_ACTIVE_COLOR_BACKGROUND);
editor->click_target = GIMP_FG_BG_TARGET_BACKGROUND;
break;
case GIMP_FG_BG_TARGET_SWAP:
if (editor->context)
{
gimp_context_swap_colors (editor->context);
g_signal_emit (editor, editor_signals[COLORS_SWAPPED], 0);
}
break;
case GIMP_FG_BG_TARGET_DEFAULT:
if (editor->context)
{
gimp_context_set_default_colors (editor->context);
g_signal_emit (editor, editor_signals[COLORS_DEFAULT], 0);
}
break;
default:
break;
}
}
return GDK_EVENT_STOP;
}
static gboolean
gimp_fg_bg_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
if (bevent->button == 1)
{
GimpFgBgTarget target = gimp_fg_bg_editor_target (editor,
bevent->x, bevent->y);
if (target == editor->click_target)
{
switch (target)
{
case GIMP_FG_BG_TARGET_FOREGROUND:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
GIMP_ACTIVE_COLOR_FOREGROUND);
break;
case GIMP_FG_BG_TARGET_BACKGROUND:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
GIMP_ACTIVE_COLOR_BACKGROUND);
break;
default:
break;
}
}
editor->click_target = GIMP_FG_BG_TARGET_INVALID;
}
return GDK_EVENT_STOP;
}
static gboolean
gimp_fg_bg_editor_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
GimpFgBgTarget target = gimp_fg_bg_editor_target (editor, x, y);
if (target == GIMP_FG_BG_TARGET_FOREGROUND ||
target == GIMP_FG_BG_TARGET_BACKGROUND)
{
gdk_drag_status (context, GDK_ACTION_COPY, time);
return TRUE;
}
gdk_drag_status (context, 0, time);
return FALSE;
}
static gboolean
gimp_fg_bg_editor_query_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip)
{
if (! keyboard_mode)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
GimpFgBgTarget target = gimp_fg_bg_editor_target (editor, x, y);
if (target != GIMP_FG_BG_TARGET_INVALID)
{
g_signal_emit (widget, editor_signals[TOOLTIP], 0,
target, tooltip);
return TRUE;
}
}
return FALSE;
}
/* public functions */
GtkWidget *
gimp_fg_bg_editor_new (GimpContext *context)
{
g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL);
return g_object_new (GIMP_TYPE_FG_BG_EDITOR,
"context", context,
NULL);
}
void
gimp_fg_bg_editor_set_context (GimpFgBgEditor *editor,
GimpContext *context)
{
g_return_if_fail (GIMP_IS_FG_BG_EDITOR (editor));
g_return_if_fail (context == NULL || GIMP_IS_CONTEXT (context));
if (context != editor->context)
{
if (editor->context)
{
g_signal_handlers_disconnect_by_func (editor->context,
gtk_widget_queue_draw,
editor);
g_signal_handlers_disconnect_by_func (editor->context,
G_CALLBACK (gimp_fg_bg_editor_image_changed),
editor);
g_object_unref (editor->context);
g_signal_handlers_disconnect_by_func (editor->color_config,
gimp_fg_bg_editor_destroy_transform,
editor);
g_clear_object (&editor->color_config);
}
editor->context = context;
if (context)
{
g_object_ref (context);
g_signal_connect_swapped (context, "foreground-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (context, "background-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (context, "image-changed",
G_CALLBACK (gimp_fg_bg_editor_image_changed),
editor);
editor->color_config = g_object_ref (context->gimp->config->color_management);
g_signal_connect_swapped (editor->color_config, "notify",
G_CALLBACK (gimp_fg_bg_editor_destroy_transform),
editor);
}
gimp_fg_bg_editor_destroy_transform (editor);
g_object_notify (G_OBJECT (editor), "context");
}
}
void
gimp_fg_bg_editor_set_active (GimpFgBgEditor *editor,
GimpActiveColor active)
{
g_return_if_fail (GIMP_IS_FG_BG_EDITOR (editor));
editor->active_color = active;
gtk_widget_queue_draw (GTK_WIDGET (editor));
g_object_notify (G_OBJECT (editor), "active-color");
}
/* private functions */
static void
gimp_fg_bg_editor_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
if (editor->context)
{
switch (editor->active_color)
{
case GIMP_ACTIVE_COLOR_FOREGROUND:
gimp_context_get_foreground (editor->context, color);
break;
case GIMP_ACTIVE_COLOR_BACKGROUND:
gimp_context_get_background (editor->context, color);
break;
}
}
}
static void
gimp_fg_bg_editor_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
if (editor->context)
{
switch (gimp_fg_bg_editor_target (editor, x, y))
{
case GIMP_FG_BG_TARGET_FOREGROUND:
gimp_context_set_foreground (editor->context, color);
g_signal_emit (editor, editor_signals[COLOR_DROPPED], 0,
GIMP_ACTIVE_COLOR_FOREGROUND);
break;
case GIMP_FG_BG_TARGET_BACKGROUND:
gimp_context_set_background (editor->context, color);
g_signal_emit (editor, editor_signals[COLOR_DROPPED], 0,
GIMP_ACTIVE_COLOR_BACKGROUND);
break;
default:
break;
}
}
}
static void
gimp_fg_bg_editor_create_transform (GimpFgBgEditor *editor)
{
if (editor->color_config)
{
static GimpColorProfile *profile = NULL;
if (G_UNLIKELY (! profile))
profile = gimp_color_profile_new_rgb_srgb ();
editor->transform =
gimp_widget_get_color_transform (GTK_WIDGET (editor),
editor->color_config,
profile,
babl_format ("R'G'B'A double"),
babl_format ("R'G'B'A double"));
}
}
static void
gimp_fg_bg_editor_destroy_transform (GimpFgBgEditor *editor)
{
g_clear_object (&editor->transform);
gtk_widget_queue_draw (GTK_WIDGET (editor));
}
static void
gimp_fg_bg_editor_image_changed (GimpFgBgEditor *editor,
GimpImage *image)
{
gtk_widget_queue_draw (GTK_WIDGET (editor));
if (editor->active_image)
{
g_signal_handlers_disconnect_by_func (editor->active_image,
G_CALLBACK (gtk_widget_queue_draw),
editor);
if (gimp_image_get_base_type (editor->active_image) == GIMP_INDEXED)
{
GimpPalette *palette;
palette = gimp_image_get_colormap_palette (editor->active_image);
g_signal_handlers_disconnect_by_func (palette,
G_CALLBACK (gtk_widget_queue_draw),
editor);
}
}
editor->active_image = image;
if (image)
{
g_signal_connect_swapped (image, "notify::base-type",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (image, "colormap-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
if (gimp_image_get_base_type (image) == GIMP_INDEXED)
{
GimpPalette *palette;
palette = gimp_image_get_colormap_palette (editor->active_image);
g_signal_connect_swapped (palette, "dirty",
G_CALLBACK (gtk_widget_queue_draw),
editor);
}
}
}
static void
gimp_fg_bg_editor_draw_color_frame (GimpFgBgEditor *editor,
cairo_t *cr,
const GimpRGB *color,
gint x,
gint y,
gint width,
gint height,
gint corner_dx,
gint corner_dy)
{
GimpPalette *colormap_palette = NULL;
GimpImageBaseType base_type = GIMP_RGB;
GimpRGB transformed_color;
if (editor->active_image)
{
base_type = gimp_image_get_base_type (editor->active_image);
if (base_type == GIMP_INDEXED)
{
colormap_palette = gimp_image_get_colormap_palette (
editor->active_image);
}
}
if (editor->transform)
{
gimp_color_transform_process_pixels (editor->transform,
babl_format ("R'G'B'A double"),
color,
babl_format ("R'G'B'A double"),
&transformed_color,
1);
}
else
{
transformed_color = *color;
}
cairo_save (cr);
gimp_cairo_set_source_rgb (cr, &transformed_color);
cairo_rectangle (cr, x, y, width, height);
cairo_fill (cr);
if (editor->color_config &&
/* Common out-of-gamut case */
((color->r < 0.0 || color->r > 1.0 ||
color->g < 0.0 || color->g > 1.0 ||
color->b < 0.0 || color->b > 1.0) ||
/* Indexed images */
(colormap_palette &&
! gimp_palette_find_entry (colormap_palette, color, NULL)) ||
/* Grayscale images */
(base_type == GIMP_GRAY &&
(ABS (color->r - color->g) > CHANNEL_EPSILON ||
ABS (color->r - color->b) > CHANNEL_EPSILON ||
ABS (color->g - color->b) > CHANNEL_EPSILON))))
{
gint corner_x = x + 0.5 * (1.0 - corner_dx) * width;
gint corner_y = y + 0.5 * (1.0 - corner_dy) * height;
gint side = MIN (width, height) * 2 / 3;
GimpRGB out_of_gamut_color;
cairo_move_to (cr, corner_x, corner_y);
cairo_line_to (cr, corner_x + side * corner_dx, corner_y);
cairo_line_to (cr, corner_x, corner_y + side * corner_dy);
cairo_close_path (cr);
gimp_color_config_get_out_of_gamut_color (editor->color_config,
&out_of_gamut_color);
gimp_cairo_set_source_rgb (cr, &out_of_gamut_color);
cairo_fill (cr);
}
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_rectangle (cr, x + 0.5, y + 0.5, width - 1.0, height - 1.0);
cairo_stroke (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_rectangle (cr, x + 1.5, y + 1.5, width - 3.0, height - 3.0);
cairo_stroke (cr);
cairo_restore (cr);
}
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