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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 <string.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "gimpwidgetstypes.h"
#include "gimpcolorarea.h"
#include "gimpcolorbutton.h"
#include "gimpcolornotebook.h"
#include "gimpcolorselection.h"
#include "gimpdialog.h"
#include "gimphelpui.h"
#include "gimpstock.h"
#include "gimpwidgets-private.h"
#include "libgimp/libgimp-intl.h"
#define COLOR_SELECTION_KEY "gimp-color-selection"
#define RESPONSE_RESET 1
#define TODOUBLE(i) (i / 65535.0)
#define TOUINT16(d) ((guint16) (d * 65535 + 0.5))
#define GIMP_COLOR_BUTTON_COLOR_FG "color-button-use-foreground"
#define GIMP_COLOR_BUTTON_COLOR_BG "color-button-use-background"
#define GIMP_COLOR_BUTTON_COLOR_BLACK "color-button-use-black"
#define GIMP_COLOR_BUTTON_COLOR_WHITE "color-button-use-white"
enum
{
COLOR_CHANGED,
LAST_SIGNAL
};
static void gimp_color_button_class_init (GimpColorButtonClass *klass);
static void gimp_color_button_init (GimpColorButton *button,
GimpColorButtonClass *klass);
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 GType gimp_color_button_get_action_type (GimpColorButton *button);
static void gimp_color_button_dialog_response (GtkWidget *dialog,
gint response_id,
GimpColorButton *button);
static void gimp_color_button_use_color (GtkAction *action,
GimpColorButton *button);
static void gimp_color_button_area_changed (GtkWidget *color_area,
GimpColorButton *button);
static void gimp_color_button_selection_changed (GtkWidget *selection,
GimpColorButton *button);
static void gimp_color_button_help_func (const gchar *help_id,
gpointer help_data);
static GtkActionEntry actions[] =
{
{ "color-button-popup", NULL,
"Color Button Menu", NULL, NULL,
NULL
},
{ GIMP_COLOR_BUTTON_COLOR_FG, NULL,
N_("_Foreground Color"), NULL, NULL,
G_CALLBACK (gimp_color_button_use_color)
},
{ GIMP_COLOR_BUTTON_COLOR_BG, NULL,
N_("_Background Color"), NULL, NULL,
G_CALLBACK (gimp_color_button_use_color)
},
{ GIMP_COLOR_BUTTON_COLOR_BLACK, NULL,
N_("Blac_k"), NULL, NULL,
G_CALLBACK (gimp_color_button_use_color)
},
{ GIMP_COLOR_BUTTON_COLOR_WHITE, NULL,
N_("_White"), NULL, NULL,
G_CALLBACK (gimp_color_button_use_color)
}
};
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 = GTK_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkButtonClass *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;
klass->get_action_type = gimp_color_button_get_action_type;
}
static void
gimp_color_button_init (GimpColorButton *button,
GimpColorButtonClass *klass)
{
GtkActionGroup *group;
GtkUIManager *ui_manager;
GimpRGB color;
gint i;
button->continuous_update = FALSE;
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_area_changed),
button);
gtk_container_add (GTK_CONTAINER (button), button->color_area);
gtk_widget_show (button->color_area);
/* right-click opens a popup */
button->popup_menu = ui_manager = gtk_ui_manager_new ();
group = gtk_action_group_new ("color-button");
for (i = 0; i < G_N_ELEMENTS (actions); i++)
{
const gchar *label = gettext (actions[i].label);
const gchar *tooltip = gettext (actions[i].tooltip);
GtkAction *action;
action = g_object_new (klass->get_action_type (button),
"name", actions[i].name,
"label", label,
"tooltip", tooltip,
"stock-id", actions[i].stock_id,
NULL);
if (actions[i].callback)
g_signal_connect (action, "activate",
actions[i].callback,
button);
gtk_action_group_add_action_with_accel (group, action,
actions[i].accelerator);
g_object_unref (action);
}
gtk_ui_manager_insert_action_group (ui_manager, group, -1);
g_object_unref (group);
gtk_ui_manager_add_ui_from_string
(ui_manager,
"<ui>\n"
" <popup action=\"color-button-popup\">\n"
" <menuitem action=\"" GIMP_COLOR_BUTTON_COLOR_FG "\" />\n"
" <menuitem action=\"" GIMP_COLOR_BUTTON_COLOR_BG "\" />\n"
" <separator />\n"
" <menuitem action=\"" GIMP_COLOR_BUTTON_COLOR_BLACK "\" />\n"
" <menuitem action=\"" GIMP_COLOR_BUTTON_COLOR_WHITE "\" />\n"
" </popup>\n"
"</ui>\n",
-1, NULL);
}
static void
gimp_color_button_destroy (GtkObject *object)
{
GimpColorButton *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 (button->popup_menu)
{
g_object_unref (button->popup_menu);
button->popup_menu = NULL;
}
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static gboolean
gimp_color_button_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpColorButton *button = GIMP_COLOR_BUTTON (widget);
if (bevent->button == 3)
{
GtkWidget *menu = gtk_ui_manager_get_widget (button->popup_menu,
"/color-button-popup");
gtk_menu_set_screen (GTK_MENU (menu), gtk_widget_get_screen (widget));
gtk_menu_popup (GTK_MENU (menu),
NULL, NULL, NULL, NULL,
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);
}
static void
gimp_color_button_clicked (GtkButton *button)
{
GimpColorButton *color_button = GIMP_COLOR_BUTTON (button);
if (! color_button->dialog)
{
GtkWidget *dialog;
GtkWidget *selection;
GimpRGB color;
gimp_color_button_get_color (color_button, &color);
dialog = color_button->dialog =
gimp_dialog_new (color_button->title, COLOR_SELECTION_KEY,
GTK_WIDGET (button), 0,
gimp_color_button_help_func, NULL,
GIMP_STOCK_RESET, RESPONSE_RESET,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
RESPONSE_RESET,
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_signal_connect (dialog, "response",
G_CALLBACK (gimp_color_button_dialog_response),
color_button);
g_signal_connect (dialog, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&color_button->dialog);
selection = gimp_color_selection_new ();
gtk_container_set_border_width (GTK_CONTAINER (selection), 6);
gimp_color_selection_set_show_alpha (GIMP_COLOR_SELECTION (selection),
gimp_color_button_has_alpha (color_button));
gimp_color_selection_set_color (GIMP_COLOR_SELECTION (selection), &color);
gimp_color_selection_set_old_color (GIMP_COLOR_SELECTION (selection),
&color);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), selection);
gtk_widget_show (selection);
g_signal_connect (selection, "color_changed",
G_CALLBACK (gimp_color_button_selection_changed),
button);
g_object_set_data (G_OBJECT (color_button->dialog), COLOR_SELECTION_KEY,
selection);
}
gtk_window_present (GTK_WINDOW (color_button->dialog));
}
static GType
gimp_color_button_get_action_type (GimpColorButton *button)
{
return GTK_TYPE_ACTION;
}
/* public functions */
/**
* 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_type (GIMP_COLOR_AREA (button->color_area), type);
gimp_color_area_set_color (GIMP_COLOR_AREA (button->color_area), color);
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);
}
/**
* gimp_color_button_get_update:
* @button: A #GimpColorButton widget.
*
* Returns the color button's @continuous_update property.
*
* Return value: the @continuous_update property.
**/
gboolean
gimp_color_button_get_update (GimpColorButton *button)
{
g_return_val_if_fail (GIMP_IS_COLOR_BUTTON (button), FALSE);
return button->continuous_update;
}
/**
* gimp_color_button_set_update:
* @button: A #GimpColorButton widget.
* @continuous: The new setting of the @continuous_update property.
*
* When set to #TRUE, the @button will emit the "color_changed"
* continuously while the color is changed in the color selection
* dialog.
**/
void
gimp_color_button_set_update (GimpColorButton *button,
gboolean continuous)
{
g_return_if_fail (GIMP_IS_COLOR_BUTTON (button));
if (continuous != button->continuous_update)
{
button->continuous_update = continuous ? TRUE : FALSE;
if (button->dialog)
{
GimpColorSelection *selection;
GimpRGB color;
selection = g_object_get_data (G_OBJECT (button->dialog),
COLOR_SELECTION_KEY);
if (button->continuous_update)
{
gimp_color_selection_get_color (selection, &color);
gimp_color_button_set_color (button, &color);
}
else
{
gimp_color_selection_get_old_color (selection, &color);
gimp_color_button_set_color (button, &color);
}
}
}
}
/* private functions */
static void
gimp_color_button_dialog_response (GtkWidget *dialog,
gint response_id,
GimpColorButton *button)
{
GtkWidget *selection;
GimpRGB color;
selection = g_object_get_data (G_OBJECT (dialog), COLOR_SELECTION_KEY);
switch (response_id)
{
case RESPONSE_RESET:
gimp_color_selection_reset (GIMP_COLOR_SELECTION (selection));
break;
case GTK_RESPONSE_OK:
if (! button->continuous_update)
{
gimp_color_selection_get_color (GIMP_COLOR_SELECTION (selection),
&color);
gimp_color_button_set_color (button, &color);
}
gtk_widget_hide (dialog);
break;
default:
if (button->continuous_update)
{
gimp_color_selection_get_old_color (GIMP_COLOR_SELECTION (selection),
&color);
gimp_color_button_set_color (button, &color);
}
gtk_widget_hide (dialog);
break;
}
}
static void
gimp_color_button_use_color (GtkAction *action,
GimpColorButton *button)
{
const gchar *name;
GimpRGB color;
name = gtk_action_get_name (action);
gimp_color_button_get_color (button, &color);
if (! strcmp (name, GIMP_COLOR_BUTTON_COLOR_FG))
{
if (_gimp_get_foreground_func)
_gimp_get_foreground_func (&color);
else
gimp_rgba_set (&color, 0.0, 0.0, 0.0, 1.0);
}
else if (! strcmp (name, GIMP_COLOR_BUTTON_COLOR_BG))
{
if (_gimp_get_background_func)
_gimp_get_background_func (&color);
else
gimp_rgba_set (&color, 1.0, 1.0, 1.0, 1.0);
}
else if (! strcmp (name, GIMP_COLOR_BUTTON_COLOR_BLACK))
{
gimp_rgba_set (&color, 0.0, 0.0, 0.0, 1.0);
}
else if (! strcmp (name, GIMP_COLOR_BUTTON_COLOR_WHITE))
{
gimp_rgba_set (&color, 1.0, 1.0, 1.0, 1.0);
}
gimp_color_button_set_color (button, &color);
}
static void
gimp_color_button_area_changed (GtkWidget *color_area,
GimpColorButton *button)
{
if (button->dialog)
{
GimpColorSelection *selection;
GimpRGB color;
selection = g_object_get_data (G_OBJECT (button->dialog),
COLOR_SELECTION_KEY);
gimp_color_button_get_color (button, &color);
g_signal_handlers_block_by_func (selection,
gimp_color_button_selection_changed,
button);
gimp_color_selection_set_color (selection, &color);
g_signal_handlers_unblock_by_func (selection,
gimp_color_button_selection_changed,
button);
}
g_signal_emit (button, gimp_color_button_signals[COLOR_CHANGED], 0);
}
static void
gimp_color_button_selection_changed (GtkWidget *selection,
GimpColorButton *button)
{
if (button->continuous_update)
{
GimpRGB color;
gimp_color_selection_get_color (GIMP_COLOR_SELECTION (selection), &color);
g_signal_handlers_block_by_func (button->color_area,
gimp_color_button_area_changed,
button);
gimp_color_area_set_color (GIMP_COLOR_AREA (button->color_area), &color);
g_signal_handlers_unblock_by_func (button->color_area,
gimp_color_button_area_changed,
button);
g_signal_emit (button, gimp_color_button_signals[COLOR_CHANGED], 0);
}
}
static void
gimp_color_button_help_func (const gchar *help_id,
gpointer help_data)
{
GimpColorSelection *selection;
GimpColorNotebook *notebook;
selection = g_object_get_data (G_OBJECT (help_data), COLOR_SELECTION_KEY);
notebook = GIMP_COLOR_NOTEBOOK (selection->notebook);
help_id = GIMP_COLOR_SELECTOR_GET_CLASS (notebook->cur_page)->help_id;
gimp_standard_help_func (help_id, NULL);
}
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