308 lines
8.7 KiB
C
308 lines
8.7 KiB
C
/* GTK - The GIMP Toolkit
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*
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* Copyright (C) 2007 John Stowers, Neil Jagdish Patel.
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* Copyright (C) 2009 Bastien Nocera, David Zeuthen
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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* Code adapted from egg-spinner
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* by Christian Hergert <christian.hergert@gmail.com>
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*/
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/*
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* Modified by the GTK+ Team and others 2007. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gtkspinner.h"
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#include "gtkimage.h"
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#include "gtkintl.h"
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#include "gtkprivate.h"
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#include "gtkstylecontext.h"
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#include "gtkstylecontextprivate.h"
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#include "gtkwidgetprivate.h"
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#include "a11y/gtkspinneraccessible.h"
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/**
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* SECTION:gtkspinner
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* @Short_description: Show a spinner animation
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* @Title: GtkSpinner
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* @See_also: #GtkCellRendererSpinner, #GtkProgressBar
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*
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* A GtkSpinner widget displays an icon-size spinning animation.
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* It is often used as an alternative to a #GtkProgressBar for
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* displaying indefinite activity, instead of actual progress.
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*
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* To start the animation, use gtk_spinner_start(), to stop it
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* use gtk_spinner_stop().
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*/
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#define SPINNER_SIZE 16
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enum {
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PROP_0,
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PROP_ACTIVE
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};
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struct _GtkSpinnerPrivate
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{
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gboolean active;
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};
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static gboolean gtk_spinner_draw (GtkWidget *widget,
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cairo_t *cr);
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static void gtk_spinner_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static void gtk_spinner_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec);
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static void gtk_spinner_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_spinner_set_active (GtkSpinner *spinner,
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gboolean active);
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static void gtk_spinner_get_preferred_width (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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static void gtk_spinner_get_preferred_height (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size);
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G_DEFINE_TYPE_WITH_PRIVATE (GtkSpinner, gtk_spinner, GTK_TYPE_WIDGET)
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static void
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gtk_spinner_class_init (GtkSpinnerClass *klass)
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{
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GObjectClass *gobject_class;
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GtkWidgetClass *widget_class;
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gobject_class = G_OBJECT_CLASS(klass);
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gobject_class->get_property = gtk_spinner_get_property;
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gobject_class->set_property = gtk_spinner_set_property;
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widget_class = GTK_WIDGET_CLASS(klass);
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widget_class->size_allocate = gtk_spinner_size_allocate;
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widget_class->draw = gtk_spinner_draw;
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widget_class->get_preferred_width = gtk_spinner_get_preferred_width;
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widget_class->get_preferred_height = gtk_spinner_get_preferred_height;
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/* GtkSpinner:active:
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*
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* Whether the spinner is active
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*
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* Since: 2.20
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*/
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g_object_class_install_property (gobject_class,
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PROP_ACTIVE,
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g_param_spec_boolean ("active",
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P_("Active"),
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P_("Whether the spinner is active"),
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_SPINNER_ACCESSIBLE);
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}
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static void
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gtk_spinner_get_property (GObject *object,
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guint param_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkSpinnerPrivate *priv;
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priv = GTK_SPINNER (object)->priv;
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switch (param_id)
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{
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case PROP_ACTIVE:
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g_value_set_boolean (value, priv->active);
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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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}
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}
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static void
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gtk_spinner_set_property (GObject *object,
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guint param_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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switch (param_id)
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{
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case PROP_ACTIVE:
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gtk_spinner_set_active (GTK_SPINNER (object), g_value_get_boolean (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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}
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}
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static void
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gtk_spinner_init (GtkSpinner *spinner)
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{
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GtkStyleContext *context;
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spinner->priv = gtk_spinner_get_instance_private (spinner);
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gtk_widget_set_has_window (GTK_WIDGET (spinner), FALSE);
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context = gtk_widget_get_style_context (GTK_WIDGET (spinner));
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gtk_style_context_add_class (context, GTK_STYLE_CLASS_SPINNER);
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}
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static void
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gtk_spinner_get_preferred_width (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size)
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{
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*minimum_size = SPINNER_SIZE;
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*natural_size = SPINNER_SIZE;
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}
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static void
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gtk_spinner_get_preferred_height (GtkWidget *widget,
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gint *minimum_size,
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gint *natural_size)
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{
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*minimum_size = SPINNER_SIZE;
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*natural_size = SPINNER_SIZE;
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}
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static void
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gtk_spinner_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkStyleContext *context;
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GtkAllocation clip;
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gint size;
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context = gtk_widget_get_style_context (widget);
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size = MIN (allocation->width, allocation->height);
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_gtk_style_context_get_icon_extents (context,
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&clip,
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allocation->x + (allocation->width - size) / 2,
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allocation->y + (allocation->height - size) / 2,
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size, size);
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gdk_rectangle_union (&clip, allocation, &clip);
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gtk_widget_set_allocation (widget, allocation);
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gtk_widget_set_clip (widget, &clip);
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}
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static gboolean
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gtk_spinner_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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GtkStyleContext *context;
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gint width, height;
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gint size;
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context = gtk_widget_get_style_context (widget);
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width = gtk_widget_get_allocated_width (widget);
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height = gtk_widget_get_allocated_height (widget);
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size = MIN (width, height);
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gtk_render_activity (context, cr,
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(width - size) / 2,
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(height - size) / 2,
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size, size);
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return FALSE;
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}
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static void
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gtk_spinner_set_active (GtkSpinner *spinner,
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gboolean active)
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{
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GtkSpinnerPrivate *priv = spinner->priv;
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active = !!active;
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if (priv->active != active)
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{
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priv->active = active;
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g_object_notify (G_OBJECT (spinner), "active");
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if (active)
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gtk_widget_set_state_flags (GTK_WIDGET (spinner),
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GTK_STATE_FLAG_ACTIVE, FALSE);
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else
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gtk_widget_unset_state_flags (GTK_WIDGET (spinner),
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GTK_STATE_FLAG_ACTIVE);
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}
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}
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/**
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* gtk_spinner_new:
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*
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* Returns a new spinner widget. Not yet started.
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*
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* Returns: a new #GtkSpinner
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*
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* Since: 2.20
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*/
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GtkWidget *
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gtk_spinner_new (void)
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{
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return g_object_new (GTK_TYPE_SPINNER, NULL);
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}
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/**
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* gtk_spinner_start:
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* @spinner: a #GtkSpinner
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*
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* Starts the animation of the spinner.
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*
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* Since: 2.20
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*/
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void
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gtk_spinner_start (GtkSpinner *spinner)
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{
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g_return_if_fail (GTK_IS_SPINNER (spinner));
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gtk_spinner_set_active (spinner, TRUE);
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}
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/**
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* gtk_spinner_stop:
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* @spinner: a #GtkSpinner
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*
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* Stops the animation of the spinner.
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*
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* Since: 2.20
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*/
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void
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gtk_spinner_stop (GtkSpinner *spinner)
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{
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g_return_if_fail (GTK_IS_SPINNER (spinner));
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gtk_spinner_set_active (spinner, FALSE);
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}
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