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gtk2/gtk/gtkcolorbutton.c

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/*
* GTK - The GIMP Toolkit
* Copyright (C) 1998, 1999 Red Hat, Inc.
* All rights reserved.
*
* This Library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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 Library General Public
* License along with the Gnome Library; see the file COPYING.LIB. If not,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Color picker button for GNOME
*
* Author: Federico Mena <federico@nuclecu.unam.mx>
*
* Modified by the GTK+ Team and others 2003. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtkcolorbutton.h"
#include "gtkbutton.h"
#include "gtkmain.h"
#include "gtkalignment.h"
#include "gtkcolorsel.h"
#include "gtkcolorseldialog.h"
#include "gtkdnd.h"
#include "gtkdrawingarea.h"
#include "gtkframe.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkcolorbutton
* @Short_description: A button to launch a color selection dialog
* @Title: GtkColorButton
* @See_also: #GtkColorSelectionDialog, #GtkFontButton
*
* The #GtkColorButton is a button which displays the currently selected
* color an allows to open a color selection dialog to change the color.
* It is suitable widget for selecting a color in a preference dialog.
*/
/* Size of checks and gray levels for alpha compositing checkerboard */
#define CHECK_SIZE 4
#define CHECK_DARK (1.0 / 3.0)
#define CHECK_LIGHT (2.0 / 3.0)
struct _GtkColorButtonPrivate
{
GtkWidget *draw_area; /* Widget where we draw the color sample */
GtkWidget *cs_dialog; /* Color selection dialog */
gchar *title; /* Title for the color selection window */
GdkRGBA rgba;
guint use_alpha : 1; /* Use alpha or not */
};
/* Properties */
enum
{
PROP_0,
PROP_USE_ALPHA,
PROP_TITLE,
PROP_COLOR,
PROP_ALPHA,
PROP_RGBA
};
/* Signals */
enum
{
COLOR_SET,
LAST_SIGNAL
};
/* gobject signals */
static void gtk_color_button_finalize (GObject *object);
static void gtk_color_button_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_color_button_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
/* gtkwidget signals */
static void gtk_color_button_state_changed (GtkWidget *widget,
GtkStateType previous_state);
/* gtkbutton signals */
static void gtk_color_button_clicked (GtkButton *button);
/* source side drag signals */
static void gtk_color_button_drag_begin (GtkWidget *widget,
GdkDragContext *context,
gpointer data);
static void gtk_color_button_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time,
GtkColorButton *color_button);
/* target side drag signals */
static void gtk_color_button_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint32 time,
GtkColorButton *color_button);
static guint color_button_signals[LAST_SIGNAL] = { 0 };
static const GtkTargetEntry drop_types[] = { { "application/x-color", 0, 0 } };
G_DEFINE_TYPE (GtkColorButton, gtk_color_button, GTK_TYPE_BUTTON)
static void
gtk_color_button_class_init (GtkColorButtonClass *klass)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkButtonClass *button_class;
gobject_class = G_OBJECT_CLASS (klass);
widget_class = GTK_WIDGET_CLASS (klass);
button_class = GTK_BUTTON_CLASS (klass);
gobject_class->get_property = gtk_color_button_get_property;
gobject_class->set_property = gtk_color_button_set_property;
gobject_class->finalize = gtk_color_button_finalize;
widget_class->state_changed = gtk_color_button_state_changed;
button_class->clicked = gtk_color_button_clicked;
klass->color_set = NULL;
/**
* GtkColorButton:use-alpha:
*
* If this property is set to %TRUE, the color swatch on the button is rendered against a
* checkerboard background to show its opacity and the opacity slider is displayed in the
* color selection dialog.
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
PROP_USE_ALPHA,
g_param_spec_boolean ("use-alpha", P_("Use alpha"),
P_("Whether to give the color an alpha value"),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkColorButton:title:
*
* The title of the color selection dialog
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
PROP_TITLE,
g_param_spec_string ("title",
P_("Title"),
P_("The title of the color selection dialog"),
_("Pick a Color"),
GTK_PARAM_READWRITE));
/**
* GtkColorButton:color:
*
* The selected color.
*
* Since: 2.4
*
* Deprecated: 3.4: Use #GtkColorButton:rgba instead.
*/
g_object_class_install_property (gobject_class,
PROP_COLOR,
g_param_spec_boxed ("color",
P_("Current Color"),
P_("The selected color"),
GDK_TYPE_COLOR,
GTK_PARAM_READWRITE | G_PARAM_DEPRECATED));
/**
* GtkColorButton:alpha:
*
* The selected opacity value (0 fully transparent, 65535 fully opaque).
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
PROP_ALPHA,
g_param_spec_uint ("alpha",
P_("Current Alpha"),
P_("The selected opacity value (0 fully transparent, 65535 fully opaque)"),
0, 65535, 65535,
GTK_PARAM_READWRITE));
/**
* GtkColorButton:rgba:
*
* The RGBA color.
*
* Since: 3.0
*/
g_object_class_install_property (gobject_class,
PROP_RGBA,
g_param_spec_boxed ("rgba",
P_("Current RGBA Color"),
P_("The selected RGBA color"),
GDK_TYPE_RGBA,
GTK_PARAM_READWRITE));
/**
* GtkColorButton::color-set:
* @widget: the object which received the signal.
*
* The ::color-set signal is emitted when the user selects a color.
* When handling this signal, use gtk_color_button_get_color() and
* gtk_color_button_get_alpha() (or gtk_color_button_get_rgba()) to
* find out which color was just selected.
*
* Note that this signal is only emitted when the <emphasis>user</emphasis>
* changes the color. If you need to react to programmatic color changes
* as well, use the notify::color signal.
*
* Since: 2.4
*/
color_button_signals[COLOR_SET] = g_signal_new (I_("color-set"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkColorButtonClass, color_set),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (gobject_class, sizeof (GtkColorButtonPrivate));
}
static gboolean
gtk_color_button_has_alpha (GtkColorButton *color_button)
{
return color_button->priv->use_alpha &&
color_button->priv->rgba.alpha < 1;
}
static cairo_pattern_t *
gtk_color_button_get_checkered (void)
{
/* need to respect pixman's stride being a multiple of 4 */
static unsigned char data[8] = { 0xFF, 0x00, 0x00, 0x00,
0x00, 0xFF, 0x00, 0x00 };
static cairo_surface_t *checkered = NULL;
cairo_pattern_t *pattern;
if (checkered == NULL)
{
checkered = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_A8,
2, 2, 4);
}
pattern = cairo_pattern_create_for_surface (checkered);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
return pattern;
}
/* Handle exposure events for the color picker's drawing area */
static gint
gtk_color_button_draw_cb (GtkWidget *widget,
cairo_t *cr,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
cairo_pattern_t *checkered;
if (gtk_color_button_has_alpha (color_button))
{
cairo_set_source_rgb (cr, CHECK_DARK, CHECK_DARK, CHECK_DARK);
cairo_paint (cr);
cairo_set_source_rgb (cr, CHECK_LIGHT, CHECK_LIGHT, CHECK_LIGHT);
cairo_scale (cr, CHECK_SIZE, CHECK_SIZE);
checkered = gtk_color_button_get_checkered ();
cairo_mask (cr, checkered);
cairo_pattern_destroy (checkered);
gdk_cairo_set_source_rgba (cr, &color_button->priv->rgba);
}
else
{
cairo_set_source_rgb (cr,
color_button->priv->rgba.red,
color_button->priv->rgba.green,
color_button->priv->rgba.blue);
}
cairo_paint (cr);
if (!gtk_widget_is_sensitive (GTK_WIDGET (color_button)))
{
GtkStyleContext *context;
GdkRGBA color;
context = gtk_widget_get_style_context (widget);
gtk_style_context_get_background_color (context, GTK_STATE_FLAG_INSENSITIVE, &color);
gdk_cairo_set_source_rgba (cr, &color);
checkered = gtk_color_button_get_checkered ();
cairo_mask (cr, checkered);
cairo_pattern_destroy (checkered);
}
return FALSE;
}
static void
gtk_color_button_state_changed (GtkWidget *widget,
GtkStateType previous_state)
{
gtk_widget_queue_draw (widget);
}
static void
gtk_color_button_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint32 time,
GtkColorButton *color_button)
{
gint length;
guint16 *dropped;
length = gtk_selection_data_get_length (selection_data);
if (length < 0)
return;
/* We accept drops with the wrong format, since the KDE color
* chooser incorrectly drops application/x-color with format 8.
*/
if (length != 8)
{
g_warning ("%s: Received invalid color data", G_STRFUNC);
return;
}
dropped = (guint16 *) gtk_selection_data_get_data (selection_data);
color_button->priv->rgba.red = dropped[0] / 65535.;
color_button->priv->rgba.green = dropped[1] / 65535.;
color_button->priv->rgba.blue = dropped[2] / 65535.;
color_button->priv->rgba.alpha = dropped[3] / 65535.;
gtk_widget_queue_draw (color_button->priv->draw_area);
g_signal_emit (color_button, color_button_signals[COLOR_SET], 0);
g_object_freeze_notify (G_OBJECT (color_button));
g_object_notify (G_OBJECT (color_button), "color");
g_object_notify (G_OBJECT (color_button), "alpha");
g_object_notify (G_OBJECT (color_button), "rgba");
g_object_thaw_notify (G_OBJECT (color_button));
}
static void
set_color_icon (GdkDragContext *context,
GdkRGBA *rgba)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
48, 32);
cr = cairo_create (surface);
gdk_cairo_set_source_rgba (cr, rgba);
cairo_paint (cr);
gtk_drag_set_icon_surface (context, surface);
cairo_destroy (cr);
cairo_surface_destroy (surface);
}
static void
gtk_color_button_drag_begin (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkColorButton *color_button = data;
set_color_icon (context, &color_button->priv->rgba);
}
static void
gtk_color_button_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time,
GtkColorButton *color_button)
{
guint16 dropped[4];
dropped[0] = (guint16) (color_button->priv->rgba.red * 65535);
dropped[1] = (guint16) (color_button->priv->rgba.green * 65535);
dropped[2] = (guint16) (color_button->priv->rgba.blue * 65535);
dropped[3] = (guint16) (color_button->priv->rgba.alpha * 65535);
gtk_selection_data_set (selection_data,
gtk_selection_data_get_target (selection_data),
16, (guchar *)dropped, 8);
}
static void
gtk_color_button_init (GtkColorButton *color_button)
{
GtkWidget *alignment;
GtkWidget *frame;
PangoLayout *layout;
PangoRectangle rect;
/* Create the widgets */
color_button->priv = G_TYPE_INSTANCE_GET_PRIVATE (color_button,
GTK_TYPE_COLOR_BUTTON,
GtkColorButtonPrivate);
gtk_widget_push_composite_child ();
alignment = gtk_alignment_new (0.5, 0.5, 0.5, 1.0);
gtk_container_set_border_width (GTK_CONTAINER (alignment), 1);
gtk_container_add (GTK_CONTAINER (color_button), alignment);
gtk_widget_show (alignment);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_OUT);
gtk_container_add (GTK_CONTAINER (alignment), frame);
gtk_widget_show (frame);
/* Just some widget we can hook to expose-event on */
color_button->priv->draw_area = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
layout = gtk_widget_create_pango_layout (GTK_WIDGET (color_button), "Black");
pango_layout_get_pixel_extents (layout, NULL, &rect);
g_object_unref (layout);
gtk_widget_set_size_request (color_button->priv->draw_area, rect.width - 2, rect.height - 2);
g_signal_connect (color_button->priv->draw_area, "draw",
G_CALLBACK (gtk_color_button_draw_cb), color_button);
gtk_container_add (GTK_CONTAINER (frame), color_button->priv->draw_area);
gtk_widget_show (color_button->priv->draw_area);
color_button->priv->title = g_strdup (_("Pick a Color")); /* default title */
/* Start with opaque black, alpha disabled */
color_button->priv->rgba.red = 0;
color_button->priv->rgba.green = 0;
color_button->priv->rgba.blue = 0;
color_button->priv->rgba.alpha = 1;
color_button->priv->use_alpha = FALSE;
gtk_drag_dest_set (GTK_WIDGET (color_button),
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_DROP,
drop_types, 1, GDK_ACTION_COPY);
gtk_drag_source_set (GTK_WIDGET(color_button),
GDK_BUTTON1_MASK|GDK_BUTTON3_MASK,
drop_types, 1,
GDK_ACTION_COPY);
g_signal_connect (color_button, "drag-begin",
G_CALLBACK (gtk_color_button_drag_begin), color_button);
g_signal_connect (color_button, "drag-data-received",
G_CALLBACK (gtk_color_button_drag_data_received), color_button);
g_signal_connect (color_button, "drag-data-get",
G_CALLBACK (gtk_color_button_drag_data_get), color_button);
gtk_widget_pop_composite_child ();
}
static void
gtk_color_button_finalize (GObject *object)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (object);
if (color_button->priv->cs_dialog != NULL)
gtk_widget_destroy (color_button->priv->cs_dialog);
color_button->priv->cs_dialog = NULL;
g_free (color_button->priv->title);
color_button->priv->title = NULL;
G_OBJECT_CLASS (gtk_color_button_parent_class)->finalize (object);
}
/**
* gtk_color_button_new:
*
* Creates a new color button.
*
* This returns a widget in the form of a small button containing
* a swatch representing the current selected color. When the button
* is clicked, a color-selection dialog will open, allowing the user
* to select a color. The swatch will be updated to reflect the new
* color when the user finishes.
*
* Returns: a new color button
*
* Since: 2.4
*/
GtkWidget *
gtk_color_button_new (void)
{
return g_object_new (GTK_TYPE_COLOR_BUTTON, NULL);
}
/**
* gtk_color_button_new_with_color:
* @color: A #GdkColor to set the current color with
*
* Creates a new color button.
*
* Returns: a new color button
*
* Since: 2.4
*
* Deprecated: 3.4: Use gtk_color_button_new_with_rgba() instead.
*/
GtkWidget *
gtk_color_button_new_with_color (const GdkColor *color)
{
return g_object_new (GTK_TYPE_COLOR_BUTTON, "color", color, NULL);
}
/**
* gtk_color_button_new_with_rgba:
* @rgba: A #GdkRGBA to set the current color with
*
* Creates a new color button.
*
* Returns: a new color button
*
* Since: 3.0
*/
GtkWidget *
gtk_color_button_new_with_rgba (const GdkRGBA *rgba)
{
return g_object_new (GTK_TYPE_COLOR_BUTTON, "rgba", rgba, NULL);
}
static void
dialog_ok_clicked (GtkWidget *widget,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
GtkColorSelection *color_selection;
GtkColorSelectionDialog *selection_dialog;
selection_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);
color_selection = GTK_COLOR_SELECTION (gtk_color_selection_dialog_get_color_selection (selection_dialog));
gtk_color_selection_get_current_rgba (color_selection, &color_button->priv->rgba);
gtk_widget_hide (color_button->priv->cs_dialog);
gtk_widget_queue_draw (color_button->priv->draw_area);
g_signal_emit (color_button, color_button_signals[COLOR_SET], 0);
g_object_freeze_notify (G_OBJECT (color_button));
g_object_notify (G_OBJECT (color_button), "color");
g_object_notify (G_OBJECT (color_button), "alpha");
g_object_notify (G_OBJECT (color_button), "rgba");
g_object_thaw_notify (G_OBJECT (color_button));
}
static gboolean
dialog_destroy (GtkWidget *widget,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
color_button->priv->cs_dialog = NULL;
return FALSE;
}
static void
dialog_cancel_clicked (GtkWidget *widget,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
gtk_widget_hide (color_button->priv->cs_dialog);
}
static void
gtk_color_button_clicked (GtkButton *button)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (button);
GtkColorSelection *color_selection;
GtkColorSelectionDialog *color_dialog;
/* if dialog already exists, make sure it's shown and raised */
if (!color_button->priv->cs_dialog)
{
/* Create the dialog and connects its buttons */
GtkWidget *parent;
GtkWidget *ok_button, *cancel_button;
parent = gtk_widget_get_toplevel (GTK_WIDGET (color_button));
color_button->priv->cs_dialog = gtk_color_selection_dialog_new (color_button->priv->title);
color_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);
if (gtk_widget_is_toplevel (parent) && GTK_IS_WINDOW (parent))
{
if (GTK_WINDOW (parent) != gtk_window_get_transient_for (GTK_WINDOW (color_dialog)))
gtk_window_set_transient_for (GTK_WINDOW (color_dialog), GTK_WINDOW (parent));
gtk_window_set_modal (GTK_WINDOW (color_dialog),
gtk_window_get_modal (GTK_WINDOW (parent)));
}
g_object_get (color_dialog,
"ok-button", &ok_button,
"cancel-button", &cancel_button,
NULL);
g_signal_connect (ok_button, "clicked",
G_CALLBACK (dialog_ok_clicked), color_button);
g_signal_connect (cancel_button, "clicked",
G_CALLBACK (dialog_cancel_clicked), color_button);
g_signal_connect (color_dialog, "destroy",
G_CALLBACK (dialog_destroy), color_button);
g_object_unref (ok_button);
g_object_unref (cancel_button);
}
color_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);
color_selection = GTK_COLOR_SELECTION (gtk_color_selection_dialog_get_color_selection (color_dialog));
gtk_color_selection_set_has_opacity_control (color_selection,
color_button->priv->use_alpha);
gtk_color_selection_set_previous_rgba (color_selection,
&color_button->priv->rgba);
gtk_color_selection_set_current_rgba (color_selection,
&color_button->priv->rgba);
gtk_window_present (GTK_WINDOW (color_button->priv->cs_dialog));
}
/**
* gtk_color_button_set_color:
* @color_button: a #GtkColorButton
* @color: A #GdkColor to set the current color with
*
* Sets the current color to be @color.
*
* Since: 2.4
*
* Deprecated: Use gtk_color_button_set_rgba() instead.
*/
void
gtk_color_button_set_color (GtkColorButton *color_button,
const GdkColor *color)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
g_return_if_fail (color != NULL);
color_button->priv->rgba.red = color->red / 65535.;
color_button->priv->rgba.green = color->green / 65535.;
color_button->priv->rgba.blue = color->blue / 65535.;
gtk_widget_queue_draw (color_button->priv->draw_area);
g_object_notify (G_OBJECT (color_button), "color");
g_object_notify (G_OBJECT (color_button), "rgba");
}
/**
* gtk_color_button_set_alpha:
* @color_button: a #GtkColorButton
* @alpha: an integer between 0 and 65535
*
* Sets the current opacity to be @alpha.
*
* Since: 2.4
*/
void
gtk_color_button_set_alpha (GtkColorButton *color_button,
guint16 alpha)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
color_button->priv->rgba.alpha = alpha / 65535.;
gtk_widget_queue_draw (color_button->priv->draw_area);
g_object_notify (G_OBJECT (color_button), "alpha");
g_object_notify (G_OBJECT (color_button), "rgba");
}
/**
* gtk_color_button_get_color:
* @color_button: a #GtkColorButton
* @color: (out): a #GdkColor to fill in with the current color
*
* Sets @color to be the current color in the #GtkColorButton widget.
*
* Since: 2.4
*
* Deprecated: 3.4: Use gtk_color_button_get_rgba() instead.
*/
void
gtk_color_button_get_color (GtkColorButton *color_button,
GdkColor *color)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
color->red = (guint16) (color_button->priv->rgba.red * 65535);
color->green = (guint16) (color_button->priv->rgba.green * 65535);
color->blue = (guint16) (color_button->priv->rgba.blue * 65535);
}
/**
* gtk_color_button_get_alpha:
* @color_button: a #GtkColorButton
*
* Returns the current alpha value.
*
* Return value: an integer between 0 and 65535
*
* Since: 2.4
*/
guint16
gtk_color_button_get_alpha (GtkColorButton *color_button)
{
g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), 0);
return (guint16) (color_button->priv->rgba.alpha * 65535);
}
/**
* gtk_color_button_set_rgba:
* @color_button: a #GtkColorButton
* @rgba: a #GdkRGBA to set the current color with
*
* Sets the current color to be @rgba.
*
* Since: 3.0
*/
void
gtk_color_button_set_rgba (GtkColorButton *color_button,
const GdkRGBA *rgba)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
g_return_if_fail (rgba != NULL);
color_button->priv->rgba = *rgba;
gtk_widget_queue_draw (color_button->priv->draw_area);
g_object_notify (G_OBJECT (color_button), "color");
g_object_notify (G_OBJECT (color_button), "alpha");
g_object_notify (G_OBJECT (color_button), "rgba");
}
/**
* gtk_color_button_get_rgba:
* @color_button: a #GtkColorButton
* @rgba: (out): a #GdkRGBA to fill in with the current color
*
* Sets @rgba to be the current color in the #GtkColorButton widget.
*
* Since: 3.0
*/
void
gtk_color_button_get_rgba (GtkColorButton *color_button,
GdkRGBA *rgba)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
g_return_if_fail (rgba != NULL);
*rgba = color_button->priv->rgba;
}
/**
* gtk_color_button_set_use_alpha:
* @color_button: a #GtkColorButton
* @use_alpha: %TRUE if color button should use alpha channel, %FALSE if not
*
* Sets whether or not the color button should use the alpha channel.
*
* Since: 2.4
*/
void
gtk_color_button_set_use_alpha (GtkColorButton *color_button,
gboolean use_alpha)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
use_alpha = (use_alpha != FALSE);
if (color_button->priv->use_alpha != use_alpha)
{
color_button->priv->use_alpha = use_alpha;
gtk_widget_queue_draw (color_button->priv->draw_area);
g_object_notify (G_OBJECT (color_button), "use-alpha");
}
}
/**
* gtk_color_button_get_use_alpha:
* @color_button: a #GtkColorButton
*
* Does the color selection dialog use the alpha channel ?
*
* Returns: %TRUE if the color sample uses alpha channel, %FALSE if not
*
* Since: 2.4
*/
gboolean
gtk_color_button_get_use_alpha (GtkColorButton *color_button)
{
g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), FALSE);
return color_button->priv->use_alpha;
}
/**
* gtk_color_button_set_title:
* @color_button: a #GtkColorButton
* @title: String containing new window title
*
* Sets the title for the color selection dialog.
*
* Since: 2.4
*/
void
gtk_color_button_set_title (GtkColorButton *color_button,
const gchar *title)
{
gchar *old_title;
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
old_title = color_button->priv->title;
color_button->priv->title = g_strdup (title);
g_free (old_title);
if (color_button->priv->cs_dialog)
gtk_window_set_title (GTK_WINDOW (color_button->priv->cs_dialog),
color_button->priv->title);
g_object_notify (G_OBJECT (color_button), "title");
}
/**
* gtk_color_button_get_title:
* @color_button: a #GtkColorButton
*
* Gets the title of the color selection dialog.
*
* Returns: An internal string, do not free the return value
*
* Since: 2.4
*/
const gchar *
gtk_color_button_get_title (GtkColorButton *color_button)
{
g_return_val_if_fail (GTK_IS_COLOR_BUTTON (color_button), NULL);
return color_button->priv->title;
}
static void
gtk_color_button_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (object);
switch (param_id)
{
case PROP_USE_ALPHA:
gtk_color_button_set_use_alpha (color_button, g_value_get_boolean (value));
break;
case PROP_TITLE:
gtk_color_button_set_title (color_button, g_value_get_string (value));
break;
case PROP_COLOR:
{
GdkColor *color;
GdkRGBA rgba;
color = g_value_get_boxed (value);
rgba.red = color->red / 65535.0;
rgba.green = color->green / 65535.0;
rgba.blue = color->blue / 65535.0;
rgba.alpha = 1.0;
gtk_color_button_set_rgba (color_button, &rgba);
}
break;
case PROP_ALPHA:
gtk_color_button_set_alpha (color_button, g_value_get_uint (value));
break;
case PROP_RGBA:
gtk_color_button_set_rgba (color_button, g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_color_button_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (object);
switch (param_id)
{
case PROP_USE_ALPHA:
g_value_set_boolean (value, gtk_color_button_get_use_alpha (color_button));
break;
case PROP_TITLE:
g_value_set_string (value, gtk_color_button_get_title (color_button));
break;
case PROP_COLOR:
{
GdkColor color;
GdkRGBA rgba;
gtk_color_button_get_rgba (color_button, &rgba);
color.red = (guint16) (rgba.red * 65535 + 0.5);
color.green = (guint16) (rgba.green * 65535 + 0.5);
color.blue = (guint16) (rgba.blue * 65535 + 0.5);
g_value_set_boxed (value, &color);
}
break;
case PROP_ALPHA:
g_value_set_uint (value, gtk_color_button_get_alpha (color_button));
break;
case PROP_RGBA:
{
GdkRGBA rgba;
gtk_color_button_get_rgba (color_button, &rgba);
g_value_set_boxed (value, &rgba);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
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