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279 lines
7.4 KiB
C
279 lines
7.4 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 "gtkprivate.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtkcssnumbervalueprivate.h"
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#include "gtkrendericonprivate.h"
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/**
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* GtkSpinner:
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*
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* A `GtkSpinner` widget displays an icon-size spinning animation.
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*
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* It is often used as an alternative to a [class@Gtk.ProgressBar]
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* for displaying indefinite activity, instead of actual progress.
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*
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* 
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*
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* To start the animation, use [method@Gtk.Spinner.start], to stop it
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* use [method@Gtk.Spinner.stop].
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*
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* # CSS nodes
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*
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* `GtkSpinner` has a single CSS node with the name spinner.
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* When the animation is active, the :checked pseudoclass is
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* added to this node.
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*/
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typedef struct _GtkSpinnerClass GtkSpinnerClass;
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struct _GtkSpinner
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{
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GtkWidget parent;
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};
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struct _GtkSpinnerClass
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{
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GtkWidgetClass parent_class;
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};
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enum {
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PROP_0,
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PROP_SPINNING
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};
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G_DEFINE_TYPE (GtkSpinner, gtk_spinner, GTK_TYPE_WIDGET)
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#define DEFAULT_SIZE 16
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static void
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gtk_spinner_measure (GtkWidget *widget,
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GtkOrientation orientation,
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int for_size,
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int *minimum,
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int *natural,
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int *minimum_baseline,
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int *natural_baseline)
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{
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GtkCssStyle *style;
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style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
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*minimum = *natural = _gtk_css_number_value_get (style->icon->icon_size, 100);
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}
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static void
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gtk_spinner_snapshot (GtkWidget *widget,
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GtkSnapshot *snapshot)
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{
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GtkCssStyle *style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
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gtk_css_style_snapshot_icon (style,
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snapshot,
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gtk_widget_get_width (widget),
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gtk_widget_get_height (widget));
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}
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static void
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gtk_spinner_css_changed (GtkWidget *widget,
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GtkCssStyleChange *change)
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{
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GTK_WIDGET_CLASS (gtk_spinner_parent_class)->css_changed (widget, change);
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if (change == NULL ||
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gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_ICON_SIZE))
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{
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gtk_widget_queue_resize (widget);
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}
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else if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_ICON_TEXTURE |
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GTK_CSS_AFFECTS_ICON_REDRAW))
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{
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gtk_widget_queue_draw (widget);
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}
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}
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/**
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* gtk_spinner_get_spinning: (attributes org.gtk.Method.get_property=spinning)
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* @spinner: a `GtkSpinner`
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*
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* Returns whether the spinner is spinning.
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*
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* Returns: %TRUE if the spinner is active
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*/
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gboolean
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gtk_spinner_get_spinning (GtkSpinner *spinner)
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{
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g_return_val_if_fail (GTK_IS_SPINNER (spinner), FALSE);
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return (gtk_widget_get_state_flags ((GtkWidget *)spinner) & GTK_STATE_FLAG_CHECKED) > 0;
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}
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/**
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* gtk_spinner_set_spinning: (attributes org.gtk.Method.set_property=spinning)
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* @spinner: a `GtkSpinner`
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* @spinning: whether the spinner should be spinning
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*
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* Sets the activity of the spinner.
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*/
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void
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gtk_spinner_set_spinning (GtkSpinner *spinner,
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gboolean spinning)
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{
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g_return_if_fail (GTK_IS_SPINNER (spinner));
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spinning = !!spinning;
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if (spinning != gtk_spinner_get_spinning (spinner))
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{
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g_object_notify (G_OBJECT (spinner), "spinning");
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if (spinning)
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gtk_widget_set_state_flags (GTK_WIDGET (spinner),
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GTK_STATE_FLAG_CHECKED, 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_CHECKED);
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}
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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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switch (param_id)
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{
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case PROP_SPINNING:
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g_value_set_boolean (value, gtk_spinner_get_spinning (GTK_SPINNER (object)));
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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_SPINNING:
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gtk_spinner_set_spinning (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_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->snapshot = gtk_spinner_snapshot;
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widget_class->measure = gtk_spinner_measure;
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widget_class->css_changed = gtk_spinner_css_changed;
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/**
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* GtkSpinner:spinning: (attributes org.gtk.Property.get=gtk_spinner_get_spinning org.gtk.Property.set=gtk_spinner_set_spinning)
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*
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* Whether the spinner is spinning
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*/
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g_object_class_install_property (gobject_class,
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PROP_SPINNING,
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g_param_spec_boolean ("spinning", NULL, NULL,
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FALSE,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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gtk_widget_class_set_css_name (widget_class, I_("spinner"));
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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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}
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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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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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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_spinning (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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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_spinning (spinner, FALSE);
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}
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