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gtk2/gtk/gtkcolorbutton.c

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Add color and font picker widgets.
2003-07-01 19:52:07 +00:00
/*
* 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 "gdk/gdkkeysyms.h"
#include "gdk-pixbuf/gdk-pixbuf.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 "gtksignal.h"
#include "gtkmarshalers.h"
#include "gtkintl.h"
/* Size of checks and gray levels for alpha compositing checkerboard */
#define CHECK_SIZE 4
#define CHECK_DARK 21845 /* 65535 / 3 */
#define CHECK_LIGHT 43690
struct _GtkColorButtonPrivate
{
GdkPixbuf *pixbuf; /* Pixbuf for rendering sample */
GdkGC *gc; /* GC for drawing */
GtkWidget *drawing_area;/* Drawing area for color sample */
GtkWidget *cs_dialog; /* Color selection dialog */
gchar *title; /* Title for the color selection window */
GdkColor color;
guint16 alpha;
guint use_alpha : 1; /* Use alpha or not */
};
/* Properties */
enum
{
PROP_0,
PROP_USE_ALPHA,
PROP_TITLE,
PROP_COLOR,
PROP_ALPHA
};
/* Signals */
enum
{
COLOR_SET,
LAST_SIGNAL
};
static void gtk_color_button_class_init (GtkColorButtonClass *klass);
static void gtk_color_button_init (GtkColorButton *color_button);
/* 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_realize (GtkWidget *widget);
static void gtk_color_button_state_changed (GtkWidget *widget,
GtkStateType previous_state);
static void gtk_color_button_style_set (GtkWidget *widget,
GtkStyle *previous_style);
/* 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 gpointer parent_class = NULL;
static guint color_button_signals[LAST_SIGNAL] = { 0 };
static GtkTargetEntry drop_types[] = { { "application/x-color", 0, 0 } };
GType
gtk_color_button_get_type (void)
{
static GType color_button_type = 0;
if (!color_button_type)
{
static const GTypeInfo color_button_info =
{
sizeof (GtkColorButtonClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_color_button_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkColorButton),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_color_button_init,
};
color_button_type =
g_type_register_static (GTK_TYPE_BUTTON, "GtkColorButton",
&color_button_info, 0);
}
return color_button_type;
}
static void
gtk_color_button_class_init (GtkColorButtonClass *klass)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkButtonClass *button_class;
gobject_class = G_OBJECT_CLASS (klass);
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);
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;
widget_class->realize = gtk_color_button_realize;
widget_class->style_set = gtk_color_button_style_set;
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", _("Use alpha"),
_("Whether or not to give the color an alpha value"),
FALSE,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
/**
* 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",
_("Title"),
_("The title of the color selection dialog"),
_("Pick a color"),
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
/**
* GtkColorButton:color:
*
* The selected color.
*
* Since: 2.4
*/
g_object_class_install_property (gobject_class,
PROP_COLOR,
g_param_spec_boxed ("color",
_("Current Color"),
_("The selected color"),
GDK_TYPE_COLOR,
G_PARAM_READABLE | G_PARAM_WRITABLE));
/**
* 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",
_("Current Alpha"),
_("The selected opacity value (0 fully transparent, 65535 fully opaque)"),
0, 65535, 65535,
G_PARAM_READABLE | G_PARAM_WRITABLE));
/**
* 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() to find out which color
* was just selected.
*
* Since: 2.4
*/
color_button_signals[COLOR_SET] = g_signal_new ("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 void
render (GtkColorButton *color_button)
{
gint dark_r, dark_g, dark_b;
gint light_r, light_g, light_b;
gint i, j, rowstride;
gint width, height;
gint c1[3], c2[3];
guchar *pixels;
guint8 insensitive_r = 0;
guint8 insensitive_g = 0;
guint8 insensitive_b = 0;
width = color_button->priv->drawing_area->allocation.width;
height = color_button->priv->drawing_area->allocation.height;
if (color_button->priv->pixbuf == NULL ||
gdk_pixbuf_get_width (color_button->priv->pixbuf) != width ||
gdk_pixbuf_get_height (color_button->priv->pixbuf) != height)
{
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, width, height);
}
/* Compute dark and light check colors */
insensitive_r = GTK_WIDGET(color_button)->style->bg[GTK_STATE_INSENSITIVE].red >> 8;
insensitive_g = GTK_WIDGET(color_button)->style->bg[GTK_STATE_INSENSITIVE].green >> 8;
insensitive_b = GTK_WIDGET(color_button)->style->bg[GTK_STATE_INSENSITIVE].blue >> 8;
if (color_button->priv->use_alpha)
{
dark_r = ((CHECK_DARK << 16) + (color_button->priv->color.red - CHECK_DARK) * color_button->priv->alpha) >> 24;
dark_g = ((CHECK_DARK << 16) + (color_button->priv->color.green - CHECK_DARK) * color_button->priv->alpha) >> 24;
dark_b = ((CHECK_DARK << 16) + (color_button->priv->color.blue - CHECK_DARK) * color_button->priv->alpha) >> 24;
light_r = ((CHECK_LIGHT << 16) + (color_button->priv->color.red - CHECK_LIGHT) * color_button->priv->alpha) >> 24;
light_g = ((CHECK_LIGHT << 16) + (color_button->priv->color.green - CHECK_LIGHT) * color_button->priv->alpha) >> 24;
light_b = ((CHECK_LIGHT << 16) + (color_button->priv->color.blue - CHECK_LIGHT) * color_button->priv->alpha) >> 24;
}
else
{
dark_r = light_r = color_button->priv->color.red >> 8;
dark_g = light_g = color_button->priv->color.green >> 8;
dark_b = light_b = color_button->priv->color.blue >> 8;
}
/* Fill image buffer */
pixels = gdk_pixbuf_get_pixels (color_button->priv->pixbuf);
rowstride = gdk_pixbuf_get_rowstride (color_button->priv->pixbuf);
for (j = 0; j < height; j++)
{
if ((j / CHECK_SIZE) & 1)
{
c1[0] = dark_r;
c1[1] = dark_g;
c1[2] = dark_b;
c2[0] = light_r;
c2[1] = light_g;
c2[2] = light_b;
}
else
{
c1[0] = light_r;
c1[1] = light_g;
c1[2] = light_b;
c2[0] = dark_r;
c2[1] = dark_g;
c2[2] = dark_b;
}
for (i = 0; i < width; i++)
{
if (!GTK_WIDGET_SENSITIVE (GTK_WIDGET (color_button)) && (i+j)%2)
{
*(pixels + j * rowstride + i * 3) = insensitive_r;
*(pixels + j * rowstride + i * 3 + 1) = insensitive_g;
*(pixels + j * rowstride + i * 3 + 2) = insensitive_b;
}
else if ((i / CHECK_SIZE) & 1)
{
*(pixels + j * rowstride + i * 3) = c1[0];
*(pixels + j * rowstride + i * 3 + 1) = c1[1];
*(pixels + j * rowstride + i * 3 + 2) = c1[2];
}
else
{
*(pixels + j * rowstride + i * 3) = c2[0];
*(pixels + j * rowstride + i * 3 + 1) = c2[1];
*(pixels + j * rowstride + i * 3 + 2) = c2[2];
}
}
}
}
/* Handle exposure events for the color picker's drawing area */
static gint
expose_event (GtkWidget *widget,
GdkEventExpose *event,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
gint width = color_button->priv->drawing_area->allocation.width;
gint height = color_button->priv->drawing_area->allocation.height;
if (color_button->priv->pixbuf == NULL ||
width != gdk_pixbuf_get_width (color_button->priv->pixbuf) ||
height != gdk_pixbuf_get_height (color_button->priv->pixbuf))
render (color_button);
gdk_draw_pixbuf (widget->window,
color_button->priv->gc,
color_button->priv->pixbuf,
event->area.x,
event->area.y,
event->area.x,
event->area.y,
event->area.width,
event->area.height,
GDK_RGB_DITHER_MAX,
event->area.x,
event->area.y);
return FALSE;
}
static void
gtk_color_button_realize (GtkWidget *widget)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (widget);
GTK_WIDGET_CLASS (parent_class)->realize (widget);
if (color_button->priv->gc == NULL)
color_button->priv->gc = gdk_gc_new (widget->window);
render (color_button);
}
static void
gtk_color_button_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (widget);
GTK_WIDGET_CLASS (parent_class)->style_set (widget, previous_style);
if (GTK_WIDGET_REALIZED (widget))
{
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = NULL;
}
}
static void
gtk_color_button_state_changed (GtkWidget *widget,
GtkStateType previous_state)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (widget);
if (widget->state == GTK_STATE_INSENSITIVE || previous_state == GTK_STATE_INSENSITIVE)
{
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = NULL;
}
}
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)
{
guint16 *dropped;
if (selection_data->length < 0)
return;
if ((selection_data->format != 16) ||
(selection_data->length != 8))
{
g_warning (_("Received invalid color data\n"));
return;
}
dropped = (guint16 *)selection_data->data;
color_button->priv->color.red = dropped[0];
color_button->priv->color.green = dropped[1];
color_button->priv->color.blue = dropped[2];
color_button->priv->alpha = dropped[3];
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = NULL;
gtk_widget_queue_draw (color_button->priv->drawing_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_thaw_notify (G_OBJECT (color_button));
}
static void
set_color_icon (GdkDragContext *context,
GdkColor *color)
{
GdkPixbuf *pixbuf;
guint32 pixel;
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE,
8, 48, 32);
pixel = ((color->red & 0xff00) << 16) |
((color->green & 0xff00) << 8) |
(color->blue & 0xff00);
gdk_pixbuf_fill (pixbuf, pixel);
gtk_drag_set_icon_pixbuf (context, pixbuf, -2, -2);
g_object_unref (pixbuf);
}
static void
gtk_color_button_drag_begin (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkColorButton *color_button = data;
set_color_icon (context, &color_button->priv->color);
}
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] = color_button->priv->color.red;
dropped[1] = color_button->priv->color.green;
dropped[2] = color_button->priv->color.blue;
dropped[3] = color_button->priv->alpha;
gtk_selection_data_set (selection_data, selection_data->target,
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 = GTK_COLOR_BUTTON_GET_PRIVATE (color_button);
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);
color_button->priv->drawing_area = gtk_drawing_area_new ();
layout = gtk_widget_create_pango_layout (GTK_WIDGET (color_button), "Black");
pango_layout_get_pixel_extents (layout, NULL, &rect);
gtk_widget_set_size_request (color_button->priv->drawing_area, rect.width - 2, rect.height - 2);
g_signal_connect (color_button->priv->drawing_area, "expose_event",
G_CALLBACK (expose_event), color_button);
gtk_container_add (GTK_CONTAINER (frame), color_button->priv->drawing_area);
gtk_widget_show (color_button->priv->drawing_area);
color_button->priv->title = g_strdup (_("Pick a color")); /* default title */
/* Create the buffer for the image so that we can create an image.
* Also create the picker's pixmap.
*/
color_button->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, rect.width, rect.height);
color_button->priv->gc = NULL;
/* Start with opaque black, alpha disabled */
color_button->priv->color.red = 0;
color_button->priv->color.green = 0;
color_button->priv->color.blue = 0;
color_button->priv->alpha = 65535;
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->gc != NULL)
g_object_unref (G_OBJECT (color_button->priv->gc));
color_button->priv->gc = NULL;
if (color_button->priv->cs_dialog != NULL)
gtk_widget_destroy (color_button->priv->cs_dialog);
color_button->priv->cs_dialog = NULL;
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = NULL;
g_free (color_button->priv->title);
color_button->priv->title = NULL;
G_OBJECT_CLASS (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
*/
GtkWidget *
gtk_color_button_new_with_color (GdkColor *color)
{
return g_object_new (GTK_TYPE_COLOR_BUTTON, "color", color, NULL);
}
static void
dialog_ok_clicked (GtkWidget *widget,
gpointer data)
{
GtkColorButton *color_button = GTK_COLOR_BUTTON (data);
GtkColorSelection *color_selection;
color_selection = GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog)->colorsel);
gtk_color_selection_get_current_color (color_selection, &color_button->priv->color);
color_button->priv->alpha = gtk_color_selection_get_current_alpha (color_selection);
if (color_button->priv->pixbuf != NULL)
g_object_unref (color_button->priv->pixbuf);
color_button->priv->pixbuf = NULL;
gtk_widget_hide (color_button->priv->cs_dialog);
gtk_widget_queue_draw (color_button->priv->drawing_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_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);
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;
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 (parent)
gtk_window_set_transient_for (GTK_WINDOW (color_dialog),
GTK_WINDOW (parent));
g_signal_connect (color_dialog->ok_button, "clicked",
G_CALLBACK (dialog_ok_clicked), color_button);
g_signal_connect (color_dialog->cancel_button, "clicked",
G_CALLBACK (dialog_cancel_clicked), color_button);
g_signal_connect (color_dialog, "destroy",
G_CALLBACK (dialog_destroy), color_button);
/* If there is a grabbed window, set new dialog as modal */
if (gtk_grab_get_current ())
gtk_window_set_modal (GTK_WINDOW (color_button->priv->cs_dialog),TRUE);
}
color_dialog = GTK_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);
gtk_color_selection_set_has_opacity_control (GTK_COLOR_SELECTION (color_dialog->colorsel),
color_button->priv->use_alpha);
gtk_color_selection_set_previous_color (GTK_COLOR_SELECTION (color_dialog->colorsel),
&color_button->priv->color);
gtk_color_selection_set_previous_alpha (GTK_COLOR_SELECTION (color_dialog->colorsel),
color_button->priv->alpha);
gtk_color_selection_set_current_color (GTK_COLOR_SELECTION (color_dialog->colorsel),
&color_button->priv->color);
gtk_color_selection_set_current_alpha (GTK_COLOR_SELECTION (color_dialog->colorsel),
color_button->priv->alpha);
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
**/
void
gtk_color_button_set_color (GtkColorButton *color_button,
GdkColor *color)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
color_button->priv->color.red = color->red;
color_button->priv->color.green = color->green;
color_button->priv->color.blue = color->blue;
g_object_notify (G_OBJECT (color_button), "color");
}
/**
* 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->alpha = alpha;
g_object_notify (G_OBJECT (color_button), "alpha");
}
/**
* gtk_color_button_get_color:
* @color_button: a #GtkColorButton.
* @color: a #GdkColor to fill in with the current color.
*
* Sets @color to be the current color in the #GtkColorButton widget.
*
* Since: 2.4
**/
void
gtk_color_button_get_color (GtkColorButton *color_button,
GdkColor *color)
{
g_return_if_fail (GTK_IS_COLOR_BUTTON (color_button));
color->red = color_button->priv->color.red;
color->green = color_button->priv->color.green;
color->blue = color_button->priv->color.blue;
}
/**
* 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 color_button->priv->alpha;
}
/**
* 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;
render (color_button);
gtk_widget_queue_draw (color_button->priv->drawing_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
*/
G_CONST_RETURN 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:
gtk_color_button_set_color (color_button, g_value_get_boxed (value));
break;
case PROP_ALPHA:
gtk_color_button_set_alpha (color_button, g_value_get_uint (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);
GdkColor color;
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:
gtk_color_button_get_color (color_button, &color);
g_value_set_boxed (value, &color);
break;
case PROP_ALPHA:
g_value_set_uint (value, gtk_color_button_get_alpha (color_button));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
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