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gimp/libgimpwidgets/gimpcolorbutton.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcolorbutton.c
* Copyright (C) 1999-2001 Sven Neumann
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "gimpwidgetstypes.h"
#include "gimpcolorarea.h"
#include "gimpcolorbutton.h"
#include "libgimp/gimppalette_pdb.h"
#include "libgimp/libgimp-intl.h"
#define TODOUBLE(i) (i / 65535.0)
#define TOUINT16(d) ((guint16) (d * 65535 + 0.5))
typedef enum
{
GIMP_COLOR_BUTTON_COLOR_FG,
GIMP_COLOR_BUTTON_COLOR_BG,
GIMP_COLOR_BUTTON_COLOR_BLACK,
GIMP_COLOR_BUTTON_COLOR_WHITE,
} GimpColorButtonColor;
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
static void gimp_color_button_class_init (GimpColorButtonClass *klass);
static void gimp_color_button_init (GimpColorButton *button);
static void gimp_color_button_destroy (GtkObject *object);
static gboolean gimp_color_button_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static void gimp_color_button_state_changed (GtkWidget *widget,
GtkStateType prev_state);
static void gimp_color_button_clicked (GtkButton *button);
static void gimp_color_button_dialog_ok (GtkWidget *widget,
gpointer data);
static void gimp_color_button_dialog_cancel (GtkWidget *widget,
gpointer data);
static void gimp_color_button_use_color (gpointer callback_data,
guint callback_action,
GtkWidget *widget);
static gchar * gimp_color_button_menu_translate (const gchar *path,
gpointer func_data);
static void gimp_color_button_color_changed (GtkObject *object,
gpointer data);
static GtkItemFactoryEntry menu_items[] =
{
{ N_("/Foreground Color"), NULL,
gimp_color_button_use_color, GIMP_COLOR_BUTTON_COLOR_FG, NULL },
{ N_("/Background Color"), NULL,
gimp_color_button_use_color, GIMP_COLOR_BUTTON_COLOR_BG, NULL },
{ "/fg-bg-separator", NULL, NULL, 0, "<Separator>"},
{ N_("/Black"), NULL,
gimp_color_button_use_color, GIMP_COLOR_BUTTON_COLOR_BLACK, NULL },
{ N_("/White"), NULL,
gimp_color_button_use_color, GIMP_COLOR_BUTTON_COLOR_WHITE, NULL },
};
static guint gimp_color_button_signals[LAST_SIGNAL] = { 0 };
static GimpButtonClass * parent_class = NULL;
GType
gimp_color_button_get_type (void)
{
static GType button_type = 0;
if (!button_type)
{
static const GTypeInfo button_info =
{
sizeof (GimpColorButtonClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_color_button_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpColorButton),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_color_button_init,
};
button_type = g_type_register_static (GIMP_TYPE_BUTTON,
"GimpColorButton",
&button_info, 0);
}
return button_type;
}
static void
gimp_color_button_class_init (GimpColorButtonClass *klass)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkButtonClass *button_class;
object_class = GTK_OBJECT_CLASS (klass);
widget_class = GTK_WIDGET_CLASS (klass);
button_class = GTK_BUTTON_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gimp_color_button_signals[COLOR_CHANGED] =
g_signal_new ("color_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpColorButtonClass, color_changed),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->destroy = gimp_color_button_destroy;
widget_class->button_press_event = gimp_color_button_button_press;
widget_class->state_changed = gimp_color_button_state_changed;
button_class->clicked = gimp_color_button_clicked;
klass->color_changed = NULL;
}
static void
gimp_color_button_init (GimpColorButton *button)
{
GimpRGB color;
button->title = NULL;
button->dialog = NULL;
gimp_rgba_set (&color, 0.0, 0.0, 0.0, 1.0);
button->color_area = gimp_color_area_new (&color, FALSE, GDK_BUTTON2_MASK);
g_signal_connect (button->color_area, "color_changed",
G_CALLBACK (gimp_color_button_color_changed),
button);
gtk_container_add (GTK_CONTAINER (button), button->color_area);
gtk_widget_show (button->color_area);
/* right-click opens a popup */
button->item_factory = gtk_item_factory_new (GTK_TYPE_MENU, "<popup>", NULL);
gtk_item_factory_set_translate_func (button->item_factory,
gimp_color_button_menu_translate,
NULL, NULL);
gtk_item_factory_create_items (button->item_factory,
G_N_ELEMENTS (menu_items), menu_items, button);
}
static void
gimp_color_button_destroy (GtkObject *object)
{
GimpColorButton *button;
button = GIMP_COLOR_BUTTON (object);
if (button->title)
{
g_free (button->title);
button->title = NULL;
}
if (button->dialog)
{
gtk_widget_destroy (button->dialog);
button->dialog = NULL;
}
if (button->color_area)
{
gtk_widget_destroy (button->color_area);
button->color_area = NULL;
}
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static gboolean
gimp_color_button_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpColorButton *button;
gint x;
gint y;
button = GIMP_COLOR_BUTTON (widget);
if (bevent->button == 3)
{
gdk_window_get_origin (GTK_WIDGET (widget)->window, &x, &y);
x += widget->allocation.x;
y += widget->allocation.y;
gtk_item_factory_popup (button->item_factory,
x + bevent->x, y + bevent->y,
bevent->button, bevent->time);
}
if (GTK_WIDGET_CLASS (parent_class)->button_press_event)
return GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, bevent);
return FALSE;
}
static void
gimp_color_button_state_changed (GtkWidget *widget,
GtkStateType prev_state)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (widget));
if (! GTK_WIDGET_IS_SENSITIVE (widget) && GIMP_COLOR_BUTTON (widget)->dialog)
gtk_widget_hide (GIMP_COLOR_BUTTON (widget)->dialog);
if (GTK_WIDGET_CLASS (parent_class)->state_changed)
GTK_WIDGET_CLASS (parent_class)->state_changed (widget, prev_state);
}
/**
* gimp_color_button_new:
* @title: String that will be used as title for the color_selector.
* @width: Width of the colorpreview in pixels.
* @height: Height of the colorpreview in pixels.
* @color: A pointer to a #GimpRGB color.
* @type:
*
* Creates a new #GimpColorButton widget.
*
* This returns a button with a preview showing the color.
* When the button is clicked a GtkColorSelectionDialog is opened.
* If the user changes the color the new color is written into the
* array that was used to pass the initial color and the "color_changed"
* signal is emitted.
*
* Returns: Pointer to the new #GimpColorButton widget.
**/
GtkWidget *
gimp_color_button_new (const gchar *title,
gint width,
gint height,
const GimpRGB *color,
GimpColorAreaType type)
{
GimpColorButton *button;
g_return_val_if_fail (color != NULL, NULL);
button = g_object_new (GIMP_TYPE_COLOR_BUTTON, NULL);
button->title = g_strdup (title);
gtk_widget_set_size_request (GTK_WIDGET (button->color_area), width, height);
gimp_color_area_set_color (GIMP_COLOR_AREA (button->color_area), color);
gimp_color_area_set_type (GIMP_COLOR_AREA (button->color_area), type);
return GTK_WIDGET (button);
}
/**
* gimp_color_button_set_color:
* @button: Pointer to a #GimpColorButton.
* @color: Pointer to the new #GimpRGB color.
*
* Sets the @button to the given @color.
**/
void
gimp_color_button_set_color (GimpColorButton *button,
const GimpRGB *color)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (button));
g_return_if_fail (color != NULL);
gimp_color_area_set_color (GIMP_COLOR_AREA (button->color_area), color);
}
/**
* gimp_color_button_get_color:
* @button: Pointer to a #GimpColorButton.
* @color: Pointer to a #GimpRGB struct used to return the color.
*
* Retrieves the currently set color from the @button.
**/
void
gimp_color_button_get_color (GimpColorButton *button,
GimpRGB *color)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (button));
g_return_if_fail (color != NULL);
gimp_color_area_get_color (GIMP_COLOR_AREA (button->color_area), color);
}
/**
* gimp_color_button_has_alpha:
* @button: Pointer to a #GimpColorButton.
*
* Checks whether the @buttons shows transparency information.
*
* Returns: %TRUE if the @button shows transparency information, %FALSE
* otherwise.
**/
gboolean
gimp_color_button_has_alpha (GimpColorButton *button)
{
g_return_val_if_fail (GIMP_IS_COLOR_BUTTON (button), FALSE);
return gimp_color_area_has_alpha (GIMP_COLOR_AREA (button->color_area));
}
/**
* gimp_color_button_set_type:
* @button: Pointer to a #GimpColorButton.
* @type: the new #GimpColorAreaType
*
* Sets the @button to the given @type. See also gimp_color_area_set_type().
**/
void
gimp_color_button_set_type (GimpColorButton *button,
GimpColorAreaType type)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (button));
gimp_color_area_set_type (GIMP_COLOR_AREA (button->color_area), type);
}
static void
gimp_color_button_clicked (GtkButton *button)
{
GimpColorButton *color_button;
GtkWidget *dialog;
GimpRGB color;
GdkColor gdk_color;
guint16 alpha;
g_return_if_fail (GIMP_IS_COLOR_BUTTON (button));
color_button = GIMP_COLOR_BUTTON (button);
gimp_color_button_get_color (color_button, &color);
gdk_color.red = TOUINT16 (color.r);
gdk_color.green = TOUINT16 (color.g);
gdk_color.blue = TOUINT16 (color.b);
alpha = TOUINT16 (color.a);
dialog = color_button->dialog;
if (!dialog)
{
dialog = gtk_color_selection_dialog_new (color_button->title);
gtk_color_selection_set_has_opacity_control (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (dialog)->colorsel), TRUE);
gtk_widget_destroy (GTK_COLOR_SELECTION_DIALOG (dialog)->help_button);
gtk_container_set_border_width (GTK_CONTAINER (dialog), 2);
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&color_button->dialog);
g_signal_connect (GTK_COLOR_SELECTION_DIALOG (dialog)->ok_button,
"clicked",
G_CALLBACK (gimp_color_button_dialog_ok),
color_button);
g_signal_connect (GTK_COLOR_SELECTION_DIALOG (dialog)->cancel_button,
"clicked",
G_CALLBACK (gimp_color_button_dialog_cancel),
color_button);
gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_MOUSE);
color_button->dialog = dialog;
}
gtk_color_selection_set_current_color (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (dialog)->colorsel), &gdk_color);
gtk_color_selection_set_current_alpha (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (dialog)->colorsel), alpha);
gtk_widget_show (dialog);
}
static void
gimp_color_button_dialog_ok (GtkWidget *widget,
gpointer data)
{
GimpColorButton *button;
GimpRGB color;
GdkColor gdk_color;
guint16 alpha;
g_return_if_fail (GIMP_IS_COLOR_BUTTON (data));
button = GIMP_COLOR_BUTTON (data);
gtk_color_selection_get_current_color (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (button->dialog)->colorsel), &gdk_color);
alpha = gtk_color_selection_get_current_alpha (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (button->dialog)->colorsel));
color.r = TODOUBLE (gdk_color.red);
color.g = TODOUBLE (gdk_color.green);
color.b = TODOUBLE (gdk_color.blue);
color.a = TODOUBLE (alpha);
gimp_color_button_set_color (button, &color);
gtk_widget_hide (button->dialog);
}
static void
gimp_color_button_dialog_cancel (GtkWidget *widget,
gpointer data)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (data));
gtk_widget_hide (GIMP_COLOR_BUTTON (data)->dialog);
}
static void
gimp_color_button_use_color (gpointer callback_data,
guint callback_action,
GtkWidget *widget)
{
GimpRGB color;
GimpColorButtonColor type;
type = (GimpColorButtonColor) callback_action;
gimp_color_button_get_color (GIMP_COLOR_BUTTON (callback_data), &color);
switch (type)
{
case GIMP_COLOR_BUTTON_COLOR_FG:
gimp_palette_get_foreground (&color);
break;
case GIMP_COLOR_BUTTON_COLOR_BG:
gimp_palette_get_background (&color);
break;
case GIMP_COLOR_BUTTON_COLOR_BLACK:
gimp_rgb_set (&color, 0.0, 0.0, 0.0);
break;
case GIMP_COLOR_BUTTON_COLOR_WHITE:
gimp_rgb_set (&color, 1.0, 1.0, 1.0);
break;
}
gimp_color_button_set_color (GIMP_COLOR_BUTTON (callback_data), &color);
}
static void
gimp_color_button_color_changed (GtkObject *object,
gpointer data)
{
GimpColorButton *button = GIMP_COLOR_BUTTON (data);
if (button->dialog)
{
GimpRGB color;
GdkColor gdk_color;
guint16 alpha;
gimp_color_button_get_color (GIMP_COLOR_BUTTON (data), &color);
gdk_color.red = TOUINT16 (color.r);
gdk_color.green = TOUINT16 (color.g);
gdk_color.blue = TOUINT16 (color.b);
alpha = TOUINT16 (color.a);
gtk_color_selection_set_current_color (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (button->dialog)->colorsel), &gdk_color);
gtk_color_selection_set_current_alpha (GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (button->dialog)->colorsel), alpha);
}
g_signal_emit (button, gimp_color_button_signals[COLOR_CHANGED], 0);
}
static gchar *
gimp_color_button_menu_translate (const gchar *path,
gpointer func_data)
{
return (gettext (path));
}
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