forked from AuroraMiddleware/gtk
518 lines
14 KiB
C
518 lines
14 KiB
C
/*
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* GTK - The GIMP Toolkit
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* Copyright (C) 2022 Red Hat, Inc.
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* All rights reserved.
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*
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* This Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcolordialogbutton.h"
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#include "gtkbinlayout.h"
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#include "gtkbutton.h"
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#include "gtkcolorswatchprivate.h"
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#include "gtkdragsource.h"
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#include "gtkdroptarget.h"
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#include <glib/gi18n-lib.h>
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#include "gtkmain.h"
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#include "gtkmarshalers.h"
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#include "gtkprivate.h"
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#include "gtksnapshot.h"
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#include "gtkwidgetprivate.h"
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#include "gdk/gdkrgbaprivate.h"
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static gboolean drop (GtkDropTarget *dest,
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const GValue *value,
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double x,
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double y,
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GtkColorDialogButton *self);
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static GdkContentProvider *
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drag_prepare (GtkDragSource *source,
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double x,
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double y,
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GtkColorDialogButton *self);
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static void button_clicked (GtkColorDialogButton *self);
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static void update_button_sensitivity
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(GtkColorDialogButton *self);
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/**
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* GtkColorDialogButton:
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*
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* The `GtkColorDialogButton` is a wrapped around a [class@Gtk.ColorDialog]
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* and allows to open a color chooser dialog to change the color.
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*
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* 
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*
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* It is suitable widget for selecting a color in a preference dialog.
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*
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* # CSS nodes
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*
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* ```
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* colorbutton
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* ╰── button.color
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* ╰── [content]
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* ```
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*
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* `GtkColorDialogButton` has a single CSS node with name colorbutton which
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* contains a button node. To differentiate it from a plain `GtkButton`,
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* it gets the .color style class.
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*/
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/* {{{ GObject implementation */
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struct _GtkColorDialogButton
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{
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GtkWidget parent_instance;
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GtkWidget *button;
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GtkWidget *swatch;
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GtkColorDialog *dialog;
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GCancellable *cancellable;
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GdkRGBA color;
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};
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/* Properties */
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enum
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{
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PROP_DIALOG = 1,
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PROP_RGBA,
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NUM_PROPERTIES
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};
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static GParamSpec *properties[NUM_PROPERTIES];
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G_DEFINE_TYPE (GtkColorDialogButton, gtk_color_dialog_button, GTK_TYPE_WIDGET)
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static void
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gtk_color_dialog_button_init (GtkColorDialogButton *self)
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{
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PangoLayout *layout;
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PangoRectangle rect;
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GtkDragSource *source;
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GtkDropTarget *dest;
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self->color = GDK_RGBA ("00000000");
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self->button = gtk_button_new ();
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g_signal_connect_swapped (self->button, "clicked", G_CALLBACK (button_clicked), self);
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gtk_widget_set_parent (self->button, GTK_WIDGET (self));
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self->swatch = g_object_new (GTK_TYPE_COLOR_SWATCH,
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"accessible-role", GTK_ACCESSIBLE_ROLE_IMG,
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"selectable", FALSE,
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"has-menu", FALSE,
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"can-drag", FALSE,
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NULL);
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gtk_widget_set_can_focus (self->swatch, FALSE);
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gtk_widget_remove_css_class (self->swatch, "activatable");
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layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), "Black");
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pango_layout_get_pixel_extents (layout, NULL, &rect);
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g_object_unref (layout);
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gtk_widget_set_size_request (self->swatch, rect.width, rect.height);
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gtk_button_set_child (GTK_BUTTON (self->button), self->swatch);
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dest = gtk_drop_target_new (GDK_TYPE_RGBA, GDK_ACTION_COPY);
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g_signal_connect (dest, "drop", G_CALLBACK (drop), self);
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gtk_widget_add_controller (GTK_WIDGET (self->button), GTK_EVENT_CONTROLLER (dest));
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source = gtk_drag_source_new ();
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g_signal_connect (source, "prepare", G_CALLBACK (drag_prepare), self);
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gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (source),
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GTK_PHASE_CAPTURE);
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gtk_widget_add_controller (self->button, GTK_EVENT_CONTROLLER (source));
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gtk_widget_add_css_class (self->button, "color");
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}
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static void
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gtk_color_dialog_button_unroot (GtkWidget *widget)
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{
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GtkColorDialogButton *self = GTK_COLOR_DIALOG_BUTTON (widget);
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if (self->cancellable)
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{
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g_cancellable_cancel (self->cancellable);
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g_clear_object (&self->cancellable);
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update_button_sensitivity (self);
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}
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GTK_WIDGET_CLASS (gtk_color_dialog_button_parent_class)->unroot (widget);
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}
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static void
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gtk_color_dialog_button_set_property (GObject *object,
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unsigned int param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkColorDialogButton *self = GTK_COLOR_DIALOG_BUTTON (object);
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switch (param_id)
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{
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case PROP_DIALOG:
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gtk_color_dialog_button_set_dialog (self, g_value_get_object (value));
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break;
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case PROP_RGBA:
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gtk_color_dialog_button_set_rgba (self, g_value_get_boxed (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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break;
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}
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}
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static void
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gtk_color_dialog_button_get_property (GObject *object,
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unsigned int param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkColorDialogButton *self = GTK_COLOR_DIALOG_BUTTON (object);
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switch (param_id)
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{
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case PROP_DIALOG:
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g_value_set_object (value, self->dialog);
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break;
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case PROP_RGBA:
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g_value_set_boxed (value, &self->color);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
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break;
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}
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}
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static void
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gtk_color_dialog_button_dispose (GObject *object)
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{
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GtkColorDialogButton *self = GTK_COLOR_DIALOG_BUTTON (object);
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g_clear_pointer (&self->button, gtk_widget_unparent);
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G_OBJECT_CLASS (gtk_color_dialog_button_parent_class)->dispose (object);
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}
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static void
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gtk_color_dialog_button_finalize (GObject *object)
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{
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GtkColorDialogButton *self = GTK_COLOR_DIALOG_BUTTON (object);
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g_assert (self->cancellable == NULL);
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g_clear_object (&self->dialog);
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G_OBJECT_CLASS (gtk_color_dialog_button_parent_class)->finalize (object);
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}
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static void
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gtk_color_dialog_button_class_init (GtkColorDialogButtonClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
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object_class->get_property = gtk_color_dialog_button_get_property;
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object_class->set_property = gtk_color_dialog_button_set_property;
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object_class->dispose = gtk_color_dialog_button_dispose;
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object_class->finalize = gtk_color_dialog_button_finalize;
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widget_class->grab_focus = gtk_widget_grab_focus_child;
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widget_class->focus = gtk_widget_focus_child;
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widget_class->unroot = gtk_color_dialog_button_unroot;
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/**
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* GtkColorDialogButton:dialog: (attributes org.gtk.Property.get=gtk_color_dialog_button_get_dialog org.gtk.Property.set=gtk_color_dialog_button_set_dialog)
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*
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* The `GtkColorDialog` that contains parameters for
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* the color chooser dialog.
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*
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* Since: 4.10
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*/
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properties[PROP_DIALOG] =
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g_param_spec_object ("dialog", NULL, NULL,
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GTK_TYPE_COLOR_DIALOG,
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G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GtkColorDialogButton:rgba: (attributes org.gtk.Property.get=gtk_color_dialog_button_get_rgba org.gtk.Property.set=gtk_color_dialog_button_set_rgba)
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*
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* The selected color.
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*
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* This property can be set to give the button its initial
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* color, and it will be updated to reflect the users choice
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* in the color chooser dialog.
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*
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* Listen to `notify::rgba` to get informed about changes
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* to the buttons color.
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*
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* Since: 4.10
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*/
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properties[PROP_RGBA] =
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g_param_spec_boxed ("rgba", NULL, NULL,
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GDK_TYPE_RGBA,
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G_PARAM_READWRITE|G_PARAM_STATIC_STRINGS|G_PARAM_EXPLICIT_NOTIFY);
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g_object_class_install_properties (object_class, NUM_PROPERTIES, properties);
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gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
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gtk_widget_class_set_css_name (widget_class, "colorbutton");
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}
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/* }}} */
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/* {{{ Private API, callbacks */
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static guint
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scale_round (double value,
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double scale)
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{
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value = floor (value * scale + 0.5);
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value = CLAMP (value, 0, scale);
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return (guint)value;
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}
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static char *
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accessible_color_name (const GdkRGBA *color)
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{
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if (color->alpha < 1.0)
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return g_strdup_printf (_("Red %d%%, Green %d%%, Blue %d%%, Alpha %d%%"),
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scale_round (color->red, 100),
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scale_round (color->green, 100),
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scale_round (color->blue, 100),
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scale_round (color->alpha, 100));
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else
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return g_strdup_printf (_("Red %d%%, Green %d%%, Blue %d%%"),
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scale_round (color->red, 100),
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scale_round (color->green, 100),
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scale_round (color->blue, 100));
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}
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static gboolean
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drop (GtkDropTarget *dest,
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const GValue *value,
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double x,
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double y,
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GtkColorDialogButton *self)
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{
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GdkRGBA *color = g_value_get_boxed (value);
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gtk_color_dialog_button_set_rgba (self, color);
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return TRUE;
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}
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static GdkContentProvider *
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drag_prepare (GtkDragSource *source,
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double x,
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double y,
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GtkColorDialogButton *self)
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{
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GdkRGBA color;
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gtk_color_swatch_get_rgba (GTK_COLOR_SWATCH (self->swatch), &color);
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return gdk_content_provider_new_typed (GDK_TYPE_RGBA, &color);
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}
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static void
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update_button_sensitivity (GtkColorDialogButton *self)
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{
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gtk_widget_set_sensitive (self->button,
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self->dialog != NULL && self->cancellable == NULL);
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}
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static void
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color_chosen (GObject *source,
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GAsyncResult *result,
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gpointer data)
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{
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GtkColorDialogButton *self = data;
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GdkRGBA *color;
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color = gtk_color_dialog_choose_rgba_finish (self->dialog, result, NULL);
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if (color)
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{
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gtk_color_dialog_button_set_rgba (self, color);
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gdk_rgba_free (color);
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}
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g_clear_object (&self->cancellable);
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update_button_sensitivity (self);
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}
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static void
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button_clicked (GtkColorDialogButton *self)
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{
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GtkRoot *root = gtk_widget_get_root (GTK_WIDGET (self));
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GtkWindow *parent = NULL;
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g_assert (self->cancellable == NULL);
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self->cancellable = g_cancellable_new ();
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update_button_sensitivity (self);
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if (GTK_IS_WINDOW (root))
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parent = GTK_WINDOW (root);
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gtk_color_dialog_choose_rgba (self->dialog, parent, &self->color,
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self->cancellable, color_chosen, self);
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}
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/* }}} */
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/* {{{ Constructor */
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/**
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* gtk_color_dialog_button_new:
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* @dialog: (nullable) (transfer full): the `GtkColorDialog` to use
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*
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* Creates a new `GtkColorDialogButton` with the
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* given `GtkColorDialog`.
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*
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* You can pass `NULL` to this function and set a `GtkColorDialog`
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* later. The button will be insensitive until that happens.
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*
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* Returns: the new `GtkColorDialogButton`
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*
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* Since: 4.10
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*/
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GtkWidget *
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gtk_color_dialog_button_new (GtkColorDialog *dialog)
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{
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GtkWidget *self;
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g_return_val_if_fail (GTK_IS_COLOR_DIALOG (dialog), NULL);
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self = g_object_new (GTK_TYPE_COLOR_DIALOG_BUTTON,
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"dialog", dialog,
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NULL);
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g_clear_object (&dialog);
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return self;
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}
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/* }}} */
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/* {{{ Getters and setters */
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/**
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* gtk_color_dialog_button_get_dialog:
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* @self: a `GtkColorDialogButton`
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*
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* Returns the `GtkColorDialog` of @self.
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*
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* Returns: (transfer none) (nullable): the `GtkColorDialog`
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*
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* Since: 4.10
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*/
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GtkColorDialog *
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gtk_color_dialog_button_get_dialog (GtkColorDialogButton *self)
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{
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g_return_val_if_fail (GTK_IS_COLOR_DIALOG_BUTTON (self), NULL);
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return self->dialog;
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}
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/**
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* gtk_color_dialog_button_set_dialog:
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* @self: a `GtkColorDialogButton`
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* @dialog: the new `GtkColorDialog`
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*
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* Sets a `GtkColorDialog` object to use for
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* creating the color chooser dialog that is
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* presented when the user clicks the button.
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*
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* Since: 4.10
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*/
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void
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gtk_color_dialog_button_set_dialog (GtkColorDialogButton *self,
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GtkColorDialog *dialog)
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{
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g_return_if_fail (GTK_IS_COLOR_DIALOG_BUTTON (self));
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g_return_if_fail (GTK_IS_COLOR_DIALOG (dialog));
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if (!g_set_object (&self->dialog, dialog))
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return;
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update_button_sensitivity (self);
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DIALOG]);
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}
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/**
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* gtk_color_dialog_button_get_rgba:
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* @self: a `GtkColorDialogButton`
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*
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* Returns the color of the button.
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*
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* This function is what should be used to obtain
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* the color that was choosen by the user. To get
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* informed about changes, listen to "notify::color".
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*
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* Returns: the color
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*
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* Since: 4.10
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*/
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const GdkRGBA *
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gtk_color_dialog_button_get_rgba (GtkColorDialogButton *self)
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{
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g_return_val_if_fail (GTK_IS_COLOR_DIALOG_BUTTON (self), NULL);
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return &self->color;
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}
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/**
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* gtk_color_dialog_button_set_rgba:
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* @self: a `GtkColorDialogButton`
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* @color: the new color
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*
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* Sets the color of the button.
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*
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* Since: 4.10
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*/
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void
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gtk_color_dialog_button_set_rgba (GtkColorDialogButton *self,
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const GdkRGBA *color)
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{
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char *text;
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g_return_if_fail (GTK_IS_COLOR_DIALOG_BUTTON (self));
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g_return_if_fail (color != NULL);
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if (gdk_rgba_equal (&self->color, color))
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return;
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self->color = *color;
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gtk_color_swatch_set_rgba (GTK_COLOR_SWATCH (self->swatch), color);
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text = accessible_color_name (color);
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gtk_accessible_update_property (GTK_ACCESSIBLE (self->swatch),
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GTK_ACCESSIBLE_PROPERTY_LABEL, text,
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-1);
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g_free (text);
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g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_RGBA]);
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}
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/* }}} */
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/* vim:set foldmethod=marker expandtab: */
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