libmate-desktop: Add MateColorButton dialog

Code taken from GTK 2.24 source and renamed for MATE This will allow to use traditional color selection with GTK2 and GTK3
author: Stefano Karapetsas <[email protected]> 2014-05-04 19:00:57 +0200
committer: Stefano Karapetsas <[email protected]> 2014-05-04 19:00:57 +0200
commit: 64dfc3d24b51456f5a90fa1a59771db1ef1d980c (patch)
tree: 2d00f4e1133aef8954054fca33f0c68d81b9896d /libmate-desktop/mate-colorbutton.c
parent: cdc44ec777ed31e5e720fbede2ee6116bd43330d (diff)
download: mate-desktop-64dfc3d24b51456f5a90fa1a59771db1ef1d980c.tar.bz2
mate-desktop-64dfc3d24b51456f5a90fa1a59771db1ef1d980c.tar.xz
1 files changed, 865 insertions, 0 deletions
diff --git a/libmate-desktop/mate-colorbutton.c b/libmate-desktop/mate-colorbutton.c
new file mode 100644
index 0000000..e329d3a
--- /dev/null
+++ b/libmate-desktop/mate-colorbutton.c
@@ -0,0 +1,865 @@
+/*
+ * 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 <[email protected]>
+ *
+ * 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 "private.h"
+
+#include "mate-colorbutton.h"
+#include "mate-colorsel.h"
+#include "mate-colorseldialog.h"
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <glib/gi18n-lib.h>
+
+/* 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)
+
+#define MATE_COLOR_BUTTON_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), MATE_TYPE_COLOR_BUTTON, MateColorButtonPrivate))
+
+struct _MateColorButtonPrivate 
+{
+ GtkWidget *draw_area; /* Widget where we draw the 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
+};
+
+/* gobject signals */
+static void mate_color_button_finalize (GObject *object);
+static void mate_color_button_set_property (GObject *object,
+ guint param_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void mate_color_button_get_property (GObject *object,
+ guint param_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+/* gtkwidget signals */
+static void mate_color_button_state_changed (GtkWidget *widget, 
+ GtkStateType previous_state);
+
+/* gtkbutton signals */
+static void mate_color_button_clicked (GtkButton *button);
+
+/* source side drag signals */
+static void mate_color_button_drag_begin (GtkWidget *widget,
+ GdkDragContext *context,
+ gpointer data);
+static void mate_color_button_drag_data_get (GtkWidget *widget,
+ GdkDragContext *context,
+ GtkSelectionData *selection_data,
+ guint info,
+ guint time,
+ MateColorButton *color_button);
+
+/* target side drag signals */
+static void mate_color_button_drag_data_received (GtkWidget *widget,
+ GdkDragContext *context,
+ gint x,
+ gint y,
+ GtkSelectionData *selection_data,
+ guint info,
+ guint32 time,
+ MateColorButton *color_button);
+
+
+static guint color_button_signals[LAST_SIGNAL] = { 0 };
+
+static const GtkTargetEntry drop_types[] = { { "application/x-color", 0, 0 } };
+
+G_DEFINE_TYPE (MateColorButton, mate_color_button, GTK_TYPE_BUTTON)
+
+static void
+mate_color_button_class_init (MateColorButtonClass *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 = mate_color_button_get_property;
+ gobject_class->set_property = mate_color_button_set_property;
+ gobject_class->finalize = mate_color_button_finalize;
+ widget_class->state_changed = mate_color_button_state_changed;
+ button_class->clicked = mate_color_button_clicked;
+ klass->color_set = NULL;
+
+ /**
+ * MateColorButton: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_READWRITE));
+
+ /**
+ * MateColorButton: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_READWRITE));
+
+ /**
+ * MateColorButton: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_READWRITE));
+
+ /**
+ * MateColorButton: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_READWRITE));
+ 
+ /**
+ * MateColorButton::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 mate_color_button_get_color() and 
+ * mate_color_button_get_alpha() 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 ("color-set",
+ G_TYPE_FROM_CLASS (gobject_class),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (MateColorButtonClass, color_set),
+ NULL, NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ g_type_class_add_private (gobject_class, sizeof (MateColorButtonPrivate));
+}
+
+static gboolean
+mate_color_button_has_alpha (MateColorButton *color_button)
+{
+ return color_button->priv->use_alpha &&
+ color_button->priv->alpha < 65535;
+}
+
+static cairo_pattern_t *
+mate_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
+expose_event (GtkWidget *widget, 
+ GdkEventExpose *event, 
+ gpointer data)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (data);
+ GtkAllocation allocation;
+ cairo_pattern_t *checkered;
+ cairo_t *cr;
+
+ cr = gdk_cairo_create (event->window);
+
+ gtk_widget_get_allocation (widget, &allocation);
+ gdk_cairo_rectangle (cr, &allocation);
+ cairo_clip (cr);
+
+ if (mate_color_button_has_alpha (color_button))
+ {
+ cairo_save (cr);
+
+ 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 = mate_color_button_get_checkered ();
+ cairo_mask (cr, checkered);
+ cairo_pattern_destroy (checkered);
+
+ cairo_restore (cr);
+
+ cairo_set_source_rgba (cr,
+ color_button->priv->color.red / 65535.,
+ color_button->priv->color.green / 65535.,
+ color_button->priv->color.blue / 65535.,
+ color_button->priv->alpha / 65535.);
+ }
+ else
+ {
+ gdk_cairo_set_source_color (cr, &color_button->priv->color);
+ }
+
+ cairo_paint (cr);
+
+ if (!gtk_widget_is_sensitive (GTK_WIDGET (color_button)))
+ {
+ gdk_cairo_set_source_color (cr, &GTK_WIDGET(color_button)->style->bg[GTK_STATE_INSENSITIVE]);
+ checkered = mate_color_button_get_checkered ();
+ cairo_mask (cr, checkered);
+ cairo_pattern_destroy (checkered);
+ }
+
+ cairo_destroy (cr);
+
+ return FALSE;
+}
+
+static void
+mate_color_button_state_changed (GtkWidget *widget, 
+ GtkStateType previous_state)
+{
+ gtk_widget_queue_draw (widget);
+}
+
+static void
+mate_color_button_drag_data_received (GtkWidget *widget,
+ GdkDragContext *context,
+ gint x,
+ gint y,
+ GtkSelectionData *selection_data,
+ guint info,
+ guint32 time,
+ MateColorButton *color_button)
+{
+ guint16 *dropped;
+
+ if (selection_data->length < 0)
+ return;
+
+ /* We accept drops with the wrong format, since the KDE color
+ * chooser incorrectly drops application/x-color with format 8.
+ */
+ if (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];
+
+ 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_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
+mate_color_button_drag_begin (GtkWidget *widget,
+ GdkDragContext *context,
+ gpointer data)
+{
+ MateColorButton *color_button = data;
+ 
+ set_color_icon (context, &color_button->priv->color);
+}
+
+static void
+mate_color_button_drag_data_get (GtkWidget *widget,
+ GdkDragContext *context,
+ GtkSelectionData *selection_data,
+ guint info,
+ guint time,
+ MateColorButton *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
+mate_color_button_init (MateColorButton *color_button)
+{
+ GtkWidget *alignment;
+ GtkWidget *frame;
+ PangoLayout *layout;
+ PangoRectangle rect;
+
+ _mate_desktop_init_i18n ();
+
+ /* Create the widgets */
+ color_button->priv = MATE_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);
+
+ /* 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, "expose-event",
+ G_CALLBACK (expose_event), 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->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 (mate_color_button_drag_begin), color_button);
+ g_signal_connect (color_button, "drag-data-received",
+ G_CALLBACK (mate_color_button_drag_data_received), color_button);
+ g_signal_connect (color_button, "drag-data-get",
+ G_CALLBACK (mate_color_button_drag_data_get), color_button);
+
+ gtk_widget_pop_composite_child ();
+}
+
+static void
+mate_color_button_finalize (GObject *object)
+{
+ MateColorButton *color_button = MATE_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 (mate_color_button_parent_class)->finalize (object);
+}
+
+
+/**
+ * mate_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 *
+mate_color_button_new (void)
+{
+ return g_object_new (MATE_TYPE_COLOR_BUTTON, NULL);
+}
+
+/**
+ * mate_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 *
+mate_color_button_new_with_color (const GdkColor *color)
+{
+ return g_object_new (MATE_TYPE_COLOR_BUTTON, "color", color, NULL);
+}
+
+static void
+dialog_ok_clicked (GtkWidget *widget, 
+ gpointer data)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (data);
+ MateColorSelection *color_selection;
+
+ color_selection = MATE_COLOR_SELECTION (MATE_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog)->colorsel);
+
+ mate_color_selection_get_current_color (color_selection, &color_button->priv->color);
+ color_button->priv->alpha = mate_color_selection_get_current_alpha (color_selection);
+
+ 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_thaw_notify (G_OBJECT (color_button));
+}
+
+static gboolean
+dialog_destroy (GtkWidget *widget, 
+ gpointer data)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (data);
+ 
+ color_button->priv->cs_dialog = NULL;
+
+ return FALSE;
+}
+
+static void
+dialog_cancel_clicked (GtkWidget *widget,
+ gpointer data)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (data);
+ 
+ gtk_widget_hide (color_button->priv->cs_dialog); 
+}
+
+static void
+mate_color_button_clicked (GtkButton *button)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (button);
+ MateColorSelectionDialog *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 = mate_color_selection_dialog_new (color_button->priv->title);
+ 
+ color_dialog = MATE_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_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);
+ }
+
+ color_dialog = MATE_COLOR_SELECTION_DIALOG (color_button->priv->cs_dialog);
+
+ mate_color_selection_set_has_opacity_control (MATE_COLOR_SELECTION (color_dialog->colorsel),
+ color_button->priv->use_alpha);
+ 
+ mate_color_selection_set_previous_color (MATE_COLOR_SELECTION (color_dialog->colorsel), 
+ &color_button->priv->color);
+ mate_color_selection_set_previous_alpha (MATE_COLOR_SELECTION (color_dialog->colorsel), 
+ color_button->priv->alpha);
+
+ mate_color_selection_set_current_color (MATE_COLOR_SELECTION (color_dialog->colorsel), 
+ &color_button->priv->color);
+ mate_color_selection_set_current_alpha (MATE_COLOR_SELECTION (color_dialog->colorsel), 
+ color_button->priv->alpha);
+
+ gtk_window_present (GTK_WINDOW (color_button->priv->cs_dialog));
+}
+
+/**
+ * mate_color_button_set_color:
+ * @color_button: a #MateColorButton.
+ * @color: A #GdkColor to set the current color with.
+ *
+ * Sets the current color to be @color.
+ *
+ * Since: 2.4
+ **/
+void
+mate_color_button_set_color (MateColorButton *color_button,
+ const GdkColor *color)
+{
+ g_return_if_fail (MATE_IS_COLOR_BUTTON (color_button));
+ g_return_if_fail (color != NULL);
+
+ color_button->priv->color.red = color->red;
+ color_button->priv->color.green = color->green;
+ color_button->priv->color.blue = color->blue;
+
+ gtk_widget_queue_draw (color_button->priv->draw_area);
+ 
+ g_object_notify (G_OBJECT (color_button), "color");
+}
+
+
+/**
+ * mate_color_button_set_alpha:
+ * @color_button: a #MateColorButton.
+ * @alpha: an integer between 0 and 65535.
+ *
+ * Sets the current opacity to be @alpha. 
+ *
+ * Since: 2.4
+ **/
+void
+mate_color_button_set_alpha (MateColorButton *color_button,
+ guint16 alpha)
+{
+ g_return_if_fail (MATE_IS_COLOR_BUTTON (color_button));
+
+ color_button->priv->alpha = alpha;
+
+ gtk_widget_queue_draw (color_button->priv->draw_area);
+
+ g_object_notify (G_OBJECT (color_button), "alpha");
+}
+
+/**
+ * mate_color_button_get_color:
+ * @color_button: a #MateColorButton.
+ * @color: a #GdkColor to fill in with the current color.
+ *
+ * Sets @color to be the current color in the #MateColorButton widget.
+ *
+ * Since: 2.4
+ **/
+void
+mate_color_button_get_color (MateColorButton *color_button,
+ GdkColor *color)
+{
+ g_return_if_fail (MATE_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;
+}
+
+/**
+ * mate_color_button_get_alpha:
+ * @color_button: a #MateColorButton.
+ *
+ * Returns the current alpha value. 
+ *
+ * Return value: an integer between 0 and 65535.
+ *
+ * Since: 2.4
+ **/
+guint16
+mate_color_button_get_alpha (MateColorButton *color_button)
+{
+ g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), 0);
+ 
+ return color_button->priv->alpha;
+}
+
+/**
+ * mate_color_button_set_use_alpha:
+ * @color_button: a #MateColorButton.
+ * @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
+mate_color_button_set_use_alpha (MateColorButton *color_button, 
+ gboolean use_alpha)
+{
+ g_return_if_fail (MATE_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");
+ }
+}
+
+/**
+ * mate_color_button_get_use_alpha:
+ * @color_button: a #MateColorButton.
+ *
+ * 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
+mate_color_button_get_use_alpha (MateColorButton *color_button)
+{
+ g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), FALSE);
+
+ return color_button->priv->use_alpha;
+}
+
+
+/**
+ * mate_color_button_set_title:
+ * @color_button: a #MateColorButton
+ * @title: String containing new window title.
+ *
+ * Sets the title for the color selection dialog.
+ *
+ * Since: 2.4
+ */
+void
+mate_color_button_set_title (MateColorButton *color_button, 
+ const gchar *title)
+{
+ gchar *old_title;
+
+ g_return_if_fail (MATE_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");
+}
+
+/**
+ * mate_color_button_get_title:
+ * @color_button: a #MateColorButton
+ *
+ * Gets the title of the color selection dialog.
+ *
+ * Returns: An internal string, do not free the return value
+ *
+ * Since: 2.4
+ */
+const gchar *
+mate_color_button_get_title (MateColorButton *color_button)
+{
+ g_return_val_if_fail (MATE_IS_COLOR_BUTTON (color_button), NULL);
+
+ return color_button->priv->title;
+}
+
+static void
+mate_color_button_set_property (GObject *object,
+ guint param_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (object);
+
+ switch (param_id) 
+ {
+ case PROP_USE_ALPHA:
+ mate_color_button_set_use_alpha (color_button, g_value_get_boolean (value));
+ break;
+ case PROP_TITLE:
+ mate_color_button_set_title (color_button, g_value_get_string (value));
+ break;
+ case PROP_COLOR:
+ mate_color_button_set_color (color_button, g_value_get_boxed (value));
+ break;
+ case PROP_ALPHA:
+ mate_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
+mate_color_button_get_property (GObject *object,
+ guint param_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ MateColorButton *color_button = MATE_COLOR_BUTTON (object);
+ GdkColor color;
+
+ switch (param_id) 
+ {
+ case PROP_USE_ALPHA:
+ g_value_set_boolean (value, mate_color_button_get_use_alpha (color_button));
+ break;
+ case PROP_TITLE:
+ g_value_set_string (value, mate_color_button_get_title (color_button));
+ break;
+ case PROP_COLOR:
+ mate_color_button_get_color (color_button, &color);
+ g_value_set_boxed (value, &color);
+ break;
+ case PROP_ALPHA:
+ g_value_set_uint (value, mate_color_button_get_alpha (color_button));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+ break;
+ }
+}
author	Stefano Karapetsas <[email protected]>	2014-05-04 19:00:57 +0200
committer	Stefano Karapetsas <[email protected]>	2014-05-04 19:00:57 +0200
commit	64dfc3d24b51456f5a90fa1a59771db1ef1d980c (patch)
tree	2d00f4e1133aef8954054fca33f0c68d81b9896d /libmate-desktop/mate-colorbutton.c
parent	cdc44ec777ed31e5e720fbede2ee6116bd43330d (diff)
download	mate-desktop-64dfc3d24b51456f5a90fa1a59771db1ef1d980c.tar.bz2 mate-desktop-64dfc3d24b51456f5a90fa1a59771db1ef1d980c.tar.xz