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gimp/app/widgets/gimpfgbgeditor.c

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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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "core/gimpcontext.h"
#include "core/gimpmarshal.h"
#include "gimpdnd.h"
#include "gimpfgbgeditor.h"
#include "gimpwidgets-utils.h"
enum
{
PROP_0,
PROP_CONTEXT,
PROP_ACTIVE_COLOR
};
enum
{
COLOR_CLICKED,
LAST_SIGNAL
};
typedef enum
{
INVALID_AREA,
FOREGROUND_AREA,
BACKGROUND_AREA,
SWAP_AREA,
DEFAULT_AREA
} FgBgTarget;
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 gboolean gimp_fg_bg_editor_expose (GtkWidget *widget,
GdkEventExpose *eevent);
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 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);
G_DEFINE_TYPE (GimpFgBgEditor, gimp_fg_bg_editor, GTK_TYPE_DRAWING_AREA)
#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,
gimp_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GIMP_TYPE_ACTIVE_COLOR);
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->expose_event = gimp_fg_bg_editor_expose;
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;
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));
}
static void
gimp_fg_bg_editor_init (GimpFgBgEditor *editor)
{
editor->context = NULL;
editor->active_color = GIMP_ACTIVE_COLOR_FOREGROUND;
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);
}
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);
if (editor->default_icon)
{
g_object_unref (editor->default_icon);
editor->default_icon = NULL;
}
if (editor->swap_icon)
{
g_object_unref (editor->swap_icon);
editor->swap_icon = NULL;
}
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 gboolean
gimp_fg_bg_editor_expose (GtkWidget *widget,
GdkEventExpose *eevent)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
GtkStyle *style = gtk_widget_get_style (widget);
GdkWindow *window = gtk_widget_get_window (widget);
cairo_t *cr;
GtkAllocation allocation;
gint width, height;
gint default_w, default_h;
gint swap_w, swap_h;
gint rect_w, rect_h;
GimpRGB color;
if (! gtk_widget_is_drawable (widget))
return FALSE;
cr = gdk_cairo_create (eevent->window);
gdk_cairo_region (cr, eevent->region);
cairo_clip (cr);
gtk_widget_get_allocation (widget, &allocation);
width = allocation.width;
height = allocation.height;
/* draw the default colors pixbuf */
if (! editor->default_icon)
editor->default_icon = gimp_widget_load_icon (widget,
GIMP_STOCK_DEFAULT_COLORS, 12);
default_w = gdk_pixbuf_get_width (editor->default_icon);
default_h = gdk_pixbuf_get_height (editor->default_icon);
if (default_w < width / 2 && default_h < height / 2)
{
gdk_cairo_set_source_pixbuf (cr, editor->default_icon,
0, height - default_h);
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_STOCK_SWAP_COLORS, 12);
swap_w = gdk_pixbuf_get_width (editor->swap_icon);
swap_h = gdk_pixbuf_get_height (editor->swap_icon);
if (swap_w < width / 2 && swap_h < height / 2)
{
gdk_cairo_set_source_pixbuf (cr, editor->swap_icon,
width - swap_w, 0);
cairo_paint (cr);
}
else
{
swap_w = swap_h = 0;
}
rect_h = height - MAX (default_h, swap_h) - 2;
rect_w = width - MAX (default_w, swap_w) - 4;
if (rect_h > (height * 3 / 4))
rect_w = MAX (rect_w - (rect_h - ((height * 3 / 4))),
width * 2 / 3);
editor->rect_width = rect_w;
editor->rect_height = rect_h;
/* draw the background area */
if (editor->context)
{
gimp_context_get_background (editor->context, &color);
gimp_cairo_set_source_rgb (cr, &color);
cairo_rectangle (cr,
width - rect_w,
height - rect_h,
rect_w,
rect_h);
cairo_fill (cr);
}
gtk_paint_shadow (style, window, GTK_STATE_NORMAL,
editor->active_color == GIMP_ACTIVE_COLOR_FOREGROUND ?
GTK_SHADOW_OUT : GTK_SHADOW_IN,
NULL, widget, NULL,
(width - rect_w),
(height - rect_h),
rect_w, rect_h);
/* draw the foreground area */
if (editor->context)
{
gimp_context_get_foreground (editor->context, &color);
gimp_cairo_set_source_rgb (cr, &color);
cairo_rectangle (cr,
0, 0,
rect_w, rect_h);
cairo_fill (cr);
}
gtk_paint_shadow (style, window, GTK_STATE_NORMAL,
editor->active_color == GIMP_ACTIVE_COLOR_BACKGROUND ?
GTK_SHADOW_OUT : GTK_SHADOW_IN,
NULL, widget, NULL,
0, 0,
rect_w, rect_h);
cairo_destroy (cr);
return TRUE;
}
static FgBgTarget
gimp_fg_bg_editor_target (GimpFgBgEditor *editor,
gint x,
gint y)
{
GtkAllocation allocation;
gint width;
gint height;
gint rect_w = editor->rect_width;
gint rect_h = editor->rect_height;
gtk_widget_get_allocation (GTK_WIDGET (editor), &allocation);
width = allocation.width;
height = allocation.height;
if (x > 0 && x < rect_w && y > 0 && y < rect_h)
return FOREGROUND_AREA;
else if (x > (width - rect_w) && x < width &&
y > (height - rect_h) && y < height)
return BACKGROUND_AREA;
else if (x > 0 && x < (width - rect_w) &&
y > rect_h && y < height)
return DEFAULT_AREA;
else if (x > rect_w && x < width &&
y > 0 && y < (height - rect_h))
return SWAP_AREA;
return INVALID_AREA;
}
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)
{
FgBgTarget target = gimp_fg_bg_editor_target (editor,
bevent->x, bevent->y);
editor->click_target = INVALID_AREA;
switch (target)
{
case FOREGROUND_AREA:
if (editor->active_color != GIMP_ACTIVE_COLOR_FOREGROUND)
gimp_fg_bg_editor_set_active (editor,
GIMP_ACTIVE_COLOR_FOREGROUND);
editor->click_target = FOREGROUND_AREA;
break;
case BACKGROUND_AREA:
if (editor->active_color != GIMP_ACTIVE_COLOR_BACKGROUND)
gimp_fg_bg_editor_set_active (editor,
GIMP_ACTIVE_COLOR_BACKGROUND);
editor->click_target = BACKGROUND_AREA;
break;
case SWAP_AREA:
if (editor->context)
gimp_context_swap_colors (editor->context);
break;
case DEFAULT_AREA:
if (editor->context)
gimp_context_set_default_colors (editor->context);
break;
default:
break;
}
}
return FALSE;
}
static gboolean
gimp_fg_bg_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpFgBgEditor *editor = GIMP_FG_BG_EDITOR (widget);
if (bevent->button == 1)
{
FgBgTarget target = gimp_fg_bg_editor_target (editor,
bevent->x, bevent->y);
if (target == editor->click_target)
{
switch (target)
{
case FOREGROUND_AREA:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
GIMP_ACTIVE_COLOR_FOREGROUND);
break;
case BACKGROUND_AREA:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
GIMP_ACTIVE_COLOR_BACKGROUND);
break;
default:
break;
}
}
editor->click_target = INVALID_AREA;
}
return FALSE;
}
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);
FgBgTarget target = gimp_fg_bg_editor_target (editor, x, y);
if (target == FOREGROUND_AREA || target == BACKGROUND_AREA)
{
gdk_drag_status (context, GDK_ACTION_COPY, time);
return TRUE;
}
gdk_drag_status (context, 0, time);
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)
return;
if (editor->context)
{
g_signal_handlers_disconnect_by_func (editor->context,
gtk_widget_queue_draw,
editor);
g_object_unref (editor->context);
editor->context = NULL;
}
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_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 FOREGROUND_AREA:
gimp_context_set_foreground (editor->context, color);
break;
case BACKGROUND_AREA:
gimp_context_set_background (editor->context, color);
break;
default:
break;
}
}
}
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