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gtk2/gtk/gtkscalebutton.c
Pavel Holejsovsky 2fb1c06402 [GI] Add missing (out) and (array) annotations
2011-01-20 13:57:20 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2005 Ronald S. Bultje
* Copyright (C) 2006, 2007 Christian Persch
* Copyright (C) 2006 Jan Arne Petersen
* Copyright (C) 2005-2007 Red Hat, Inc.
*
* Authors:
* - Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* - Bastien Nocera <bnocera@redhat.com>
* - Jan Arne Petersen <jpetersen@jpetersen.org>
* - Christian Persch <chpe@svn.gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 2007. 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"
#ifndef _WIN32
#define _GNU_SOURCE
#endif
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "gtkbindings.h"
#include "gtkframe.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkorientable.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtkscalebutton.h"
#include "gtkstock.h"
#include "gtkvbox.h"
#include "gtkwindow.h"
#include "gtktypebuiltins.h"
#include "gtkintl.h"
/**
* SECTION:gtkscalebutton
* @Short_description: A button which pops up a scale
* @Title: GtkScaleButton
*
* #GtkScaleButton provides a button which pops up a scale widget.
* This kind of widget is commonly used for volume controls in multimedia
* applications, and GTK+ provides a #GtkVolumeButton subclass that
* is tailored for this use case.
*/
#define SCALE_SIZE 100
#define CLICK_TIMEOUT 250
enum
{
VALUE_CHANGED,
POPUP,
POPDOWN,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_ORIENTATION,
PROP_VALUE,
PROP_SIZE,
PROP_ADJUSTMENT,
PROP_ICONS
};
struct _GtkScaleButtonPrivate
{
GtkWidget *plus_button;
GtkWidget *minus_button;
GtkWidget *dock;
GtkWidget *box;
GtkWidget *scale;
GtkWidget *image;
GtkIconSize size;
GtkOrientation orientation;
guint click_id;
gint click_timeout;
guint timeout : 1;
gdouble direction;
guint32 pop_time;
gchar **icon_list;
GdkDevice *grab_pointer;
GdkDevice *grab_keyboard;
GtkAdjustment *adjustment; /* needed because it must be settable in init() */
};
static GObject* gtk_scale_button_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params);
static void gtk_scale_button_dispose (GObject *object);
static void gtk_scale_button_finalize (GObject *object);
static void gtk_scale_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_scale_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_scale_button_set_orientation_private (GtkScaleButton *button,
GtkOrientation orientation);
static gboolean gtk_scale_button_scroll (GtkWidget *widget,
GdkEventScroll *event);
static void gtk_scale_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen);
static gboolean gtk_scale_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_scale_button_key_release (GtkWidget *widget,
GdkEventKey *event);
static void gtk_scale_button_popup (GtkWidget *widget);
static void gtk_scale_button_popdown (GtkWidget *widget);
static gboolean cb_dock_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data);
static gboolean cb_dock_key_release (GtkWidget *widget,
GdkEventKey *event,
gpointer user_data);
static gboolean cb_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data);
static gboolean cb_button_release (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data);
static void cb_dock_grab_notify (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data);
static gboolean cb_dock_grab_broken_event (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data);
static void cb_scale_grab_notify (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data);
static void gtk_scale_button_update_icon (GtkScaleButton *button);
static void gtk_scale_button_scale_value_changed(GtkRange *range);
/* see below for scale definitions */
static GtkWidget *gtk_scale_button_scale_new (GtkScaleButton *button);
G_DEFINE_TYPE_WITH_CODE (GtkScaleButton, gtk_scale_button, GTK_TYPE_BUTTON,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
NULL))
static guint signals[LAST_SIGNAL] = { 0, };
static void
gtk_scale_button_class_init (GtkScaleButtonClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GtkBindingSet *binding_set;
g_type_class_add_private (klass, sizeof (GtkScaleButtonPrivate));
gobject_class->constructor = gtk_scale_button_constructor;
gobject_class->finalize = gtk_scale_button_finalize;
gobject_class->dispose = gtk_scale_button_dispose;
gobject_class->set_property = gtk_scale_button_set_property;
gobject_class->get_property = gtk_scale_button_get_property;
widget_class->button_press_event = gtk_scale_button_press;
widget_class->key_release_event = gtk_scale_button_key_release;
widget_class->scroll_event = gtk_scale_button_scroll;
widget_class->screen_changed = gtk_scale_button_screen_changed;
/**
* GtkScaleButton:orientation:
*
* The orientation of the #GtkScaleButton's popup window.
*
* Note that since GTK+ 2.16, #GtkScaleButton implements the
* #GtkOrientable interface which has its own @orientation
* property. However we redefine the property here in order to
* override its default horizontal orientation.
*
* Since: 2.14
**/
g_object_class_override_property (gobject_class,
PROP_ORIENTATION,
"orientation");
g_object_class_install_property (gobject_class,
PROP_VALUE,
g_param_spec_double ("value",
P_("Value"),
P_("The value of the scale"),
-G_MAXDOUBLE,
G_MAXDOUBLE,
0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_SIZE,
g_param_spec_enum ("size",
P_("Icon size"),
P_("The icon size"),
GTK_TYPE_ICON_SIZE,
GTK_ICON_SIZE_SMALL_TOOLBAR,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ADJUSTMENT,
g_param_spec_object ("adjustment",
P_("Adjustment"),
P_("The GtkAdjustment that contains the current value of this scale button object"),
GTK_TYPE_ADJUSTMENT,
GTK_PARAM_READWRITE));
/**
* GtkScaleButton:icons:
*
* The names of the icons to be used by the scale button.
* The first item in the array will be used in the button
* when the current value is the lowest value, the second
* item for the highest value. All the subsequent icons will
* be used for all the other values, spread evenly over the
* range of values.
*
* If there's only one icon name in the @icons array, it will
* be used for all the values. If only two icon names are in
* the @icons array, the first one will be used for the bottom
* 50% of the scale, and the second one for the top 50%.
*
* It is recommended to use at least 3 icons so that the
* #GtkScaleButton reflects the current value of the scale
* better for the users.
*
* Since: 2.12
*/
g_object_class_install_property (gobject_class,
PROP_ICONS,
g_param_spec_boxed ("icons",
P_("Icons"),
P_("List of icon names"),
G_TYPE_STRV,
GTK_PARAM_READWRITE));
/**
* GtkScaleButton::value-changed:
* @button: the object which received the signal
* @value: the new value
*
* The ::value-changed signal is emitted when the value field has
* changed.
*
* Since: 2.12
*/
signals[VALUE_CHANGED] =
g_signal_new (I_("value-changed"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkScaleButtonClass, value_changed),
NULL, NULL,
_gtk_marshal_VOID__DOUBLE,
G_TYPE_NONE, 1, G_TYPE_DOUBLE);
/**
* GtkScaleButton::popup:
* @button: the object which received the signal
*
* The ::popup signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to popup the scale widget.
*
* The default bindings for this signal are Space, Enter and Return.
*
* Since: 2.12
*/
signals[POPUP] =
g_signal_new_class_handler (I_("popup"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_scale_button_popup),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* GtkScaleButton::popdown:
* @button: the object which received the signal
*
* The ::popdown signal is a
* <link linkend="keybinding-signals">keybinding signal</link>
* which gets emitted to popdown the scale widget.
*
* The default binding for this signal is Escape.
*
* Since: 2.12
*/
signals[POPDOWN] =
g_signal_new_class_handler (I_("popdown"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_scale_button_popdown),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/* Key bindings */
binding_set = gtk_binding_set_by_class (widget_class);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_space, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Space, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_Return, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_ISO_Enter, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_KP_Enter, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KEY_Escape, 0,
"popdown", 0);
}
static void
gtk_scale_button_init (GtkScaleButton *button)
{
GtkScaleButtonPrivate *priv;
GtkWidget *frame;
button->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (button,
GTK_TYPE_SCALE_BUTTON,
GtkScaleButtonPrivate);
priv->timeout = FALSE;
priv->click_id = 0;
priv->click_timeout = CLICK_TIMEOUT;
priv->orientation = GTK_ORIENTATION_VERTICAL;
gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
gtk_button_set_focus_on_click (GTK_BUTTON (button), FALSE);
/* image */
priv->image = gtk_image_new ();
gtk_container_add (GTK_CONTAINER (button), priv->image);
gtk_widget_show_all (priv->image);
/* window */
priv->dock = gtk_window_new (GTK_WINDOW_POPUP);
gtk_widget_set_name (priv->dock, "gtk-scalebutton-popup-window");
g_signal_connect (priv->dock, "button-press-event",
G_CALLBACK (cb_dock_button_press), button);
g_signal_connect (priv->dock, "key-release-event",
G_CALLBACK (cb_dock_key_release), button);
g_signal_connect (priv->dock, "grab-notify",
G_CALLBACK (cb_dock_grab_notify), button);
g_signal_connect (priv->dock, "grab-broken-event",
G_CALLBACK (cb_dock_grab_broken_event), button);
gtk_window_set_decorated (GTK_WINDOW (priv->dock), FALSE);
/* frame */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
gtk_container_add (GTK_CONTAINER (priv->dock), frame);
/* box for scale and +/- buttons */
priv->box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (frame), priv->box);
/* + */
priv->plus_button = gtk_button_new_with_label ("+");
gtk_button_set_relief (GTK_BUTTON (priv->plus_button), GTK_RELIEF_NONE);
g_signal_connect (priv->plus_button, "button-press-event",
G_CALLBACK (cb_button_press), button);
g_signal_connect (priv->plus_button, "button-release-event",
G_CALLBACK (cb_button_release), button);
gtk_box_pack_start (GTK_BOX (priv->box), priv->plus_button, FALSE, FALSE, 0);
/* - */
priv->minus_button = gtk_button_new_with_label ("-");
gtk_button_set_relief (GTK_BUTTON (priv->minus_button), GTK_RELIEF_NONE);
g_signal_connect (priv->minus_button, "button-press-event",
G_CALLBACK (cb_button_press), button);
g_signal_connect (priv->minus_button, "button-release-event",
G_CALLBACK (cb_button_release), button);
gtk_box_pack_end (GTK_BOX (priv->box), priv->minus_button, FALSE, FALSE, 0);
priv->adjustment = gtk_adjustment_new (0.0, 0.0, 100.0, 2, 20, 0);
g_object_ref_sink (priv->adjustment);
/* the scale */
priv->scale = gtk_scale_button_scale_new (button);
gtk_container_add (GTK_CONTAINER (priv->box), priv->scale);
}
static GObject *
gtk_scale_button_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_params)
{
GObject *object;
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
object = G_OBJECT_CLASS (gtk_scale_button_parent_class)->constructor (type, n_construct_properties, construct_params);
button = GTK_SCALE_BUTTON (object);
priv = button->priv;
/* set button text and size */
priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
gtk_scale_button_update_icon (button);
return object;
}
static void
gtk_scale_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkScaleButton *button = GTK_SCALE_BUTTON (object);
switch (prop_id)
{
case PROP_ORIENTATION:
gtk_scale_button_set_orientation_private (button, g_value_get_enum (value));
break;
case PROP_VALUE:
gtk_scale_button_set_value (button, g_value_get_double (value));
break;
case PROP_SIZE:
{
GtkIconSize size;
size = g_value_get_enum (value);
if (button->priv->size != size)
{
button->priv->size = size;
gtk_scale_button_update_icon (button);
}
}
break;
case PROP_ADJUSTMENT:
gtk_scale_button_set_adjustment (button, g_value_get_object (value));
break;
case PROP_ICONS:
gtk_scale_button_set_icons (button,
(const gchar **)g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_scale_button_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkScaleButton *button = GTK_SCALE_BUTTON (object);
GtkScaleButtonPrivate *priv = button->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_VALUE:
g_value_set_double (value, gtk_scale_button_get_value (button));
break;
case PROP_SIZE:
g_value_set_enum (value, priv->size);
break;
case PROP_ADJUSTMENT:
g_value_set_object (value, gtk_scale_button_get_adjustment (button));
break;
case PROP_ICONS:
g_value_set_boxed (value, priv->icon_list);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_scale_button_finalize (GObject *object)
{
GtkScaleButton *button = GTK_SCALE_BUTTON (object);
GtkScaleButtonPrivate *priv = button->priv;
if (priv->icon_list)
{
g_strfreev (priv->icon_list);
priv->icon_list = NULL;
}
if (priv->adjustment)
{
g_object_unref (priv->adjustment);
priv->adjustment = NULL;
}
G_OBJECT_CLASS (gtk_scale_button_parent_class)->finalize (object);
}
static void
gtk_scale_button_dispose (GObject *object)
{
GtkScaleButton *button = GTK_SCALE_BUTTON (object);
GtkScaleButtonPrivate *priv = button->priv;
if (priv->dock)
{
gtk_widget_destroy (priv->dock);
priv->dock = NULL;
}
if (priv->click_id != 0)
{
g_source_remove (priv->click_id);
priv->click_id = 0;
}
G_OBJECT_CLASS (gtk_scale_button_parent_class)->dispose (object);
}
/**
* gtk_scale_button_new:
* @size: (type int): a stock icon size
* @min: the minimum value of the scale (usually 0)
* @max: the maximum value of the scale (usually 100)
* @step: the stepping of value when a scroll-wheel event,
* or up/down arrow event occurs (usually 2)
* @icons: (allow-none) (array zero-terminated=1): a %NULL-terminated
* array of icon names, or %NULL if you want to set the list
* later with gtk_scale_button_set_icons()
*
* Creates a #GtkScaleButton, with a range between @min and @max, with
* a stepping of @step.
*
* Return value: a new #GtkScaleButton
*
* Since: 2.12
*/
GtkWidget *
gtk_scale_button_new (GtkIconSize size,
gdouble min,
gdouble max,
gdouble step,
const gchar **icons)
{
GtkScaleButton *button;
GtkAdjustment *adjustment;
adjustment = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
button = g_object_new (GTK_TYPE_SCALE_BUTTON,
"adjustment", adjustment,
"icons", icons,
"size", size,
NULL);
return GTK_WIDGET (button);
}
/**
* gtk_scale_button_get_value:
* @button: a #GtkScaleButton
*
* Gets the current value of the scale button.
*
* Return value: current value of the scale button
*
* Since: 2.12
*/
gdouble
gtk_scale_button_get_value (GtkScaleButton * button)
{
GtkScaleButtonPrivate *priv;
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0);
priv = button->priv;
return gtk_adjustment_get_value (priv->adjustment);
}
/**
* gtk_scale_button_set_value:
* @button: a #GtkScaleButton
* @value: new value of the scale button
*
* Sets the current value of the scale; if the value is outside
* the minimum or maximum range values, it will be clamped to fit
* inside them. The scale button emits the #GtkScaleButton::value-changed
* signal if the value changes.
*
* Since: 2.12
*/
void
gtk_scale_button_set_value (GtkScaleButton *button,
gdouble value)
{
GtkScaleButtonPrivate *priv;
g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
priv = button->priv;
gtk_range_set_value (GTK_RANGE (priv->scale), value);
}
/**
* gtk_scale_button_set_icons:
* @button: a #GtkScaleButton
* @icons: (array zero-terminated=1): a %NULL-terminated array of icon names
*
* Sets the icons to be used by the scale button.
* For details, see the #GtkScaleButton:icons property.
*
* Since: 2.12
*/
void
gtk_scale_button_set_icons (GtkScaleButton *button,
const gchar **icons)
{
GtkScaleButtonPrivate *priv;
gchar **tmp;
g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
priv = button->priv;
tmp = priv->icon_list;
priv->icon_list = g_strdupv ((gchar **) icons);
g_strfreev (tmp);
gtk_scale_button_update_icon (button);
g_object_notify (G_OBJECT (button), "icons");
}
/**
* gtk_scale_button_get_adjustment:
* @button: a #GtkScaleButton
*
* Gets the #GtkAdjustment associated with the #GtkScaleButton's scale.
* See gtk_range_get_adjustment() for details.
*
* Returns: (transfer none): the adjustment associated with the scale
*
* Since: 2.12
*/
GtkAdjustment*
gtk_scale_button_get_adjustment (GtkScaleButton *button)
{
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
return button->priv->adjustment;
}
/**
* gtk_scale_button_set_adjustment:
* @button: a #GtkScaleButton
* @adjustment: a #GtkAdjustment
*
* Sets the #GtkAdjustment to be used as a model
* for the #GtkScaleButton's scale.
* See gtk_range_set_adjustment() for details.
*
* Since: 2.12
*/
void
gtk_scale_button_set_adjustment (GtkScaleButton *button,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
if (!adjustment)
adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
else
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
if (button->priv->adjustment != adjustment)
{
if (button->priv->adjustment)
g_object_unref (button->priv->adjustment);
button->priv->adjustment = g_object_ref_sink (adjustment);
if (button->priv->scale)
gtk_range_set_adjustment (GTK_RANGE (button->priv->scale), adjustment);
g_object_notify (G_OBJECT (button), "adjustment");
}
}
/**
* gtk_scale_button_get_plus_button:
* @button: a #GtkScaleButton
*
* Retrieves the plus button of the #GtkScaleButton.
*
* Returns: (transfer none): the plus button of the #GtkScaleButton
*
* Since: 2.14
*/
GtkWidget *
gtk_scale_button_get_plus_button (GtkScaleButton *button)
{
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
return button->priv->plus_button;
}
/**
* gtk_scale_button_get_minus_button:
* @button: a #GtkScaleButton
*
* Retrieves the minus button of the #GtkScaleButton.
*
* Returns: (transfer none): the minus button of the #GtkScaleButton
*
* Since: 2.14
*/
GtkWidget *
gtk_scale_button_get_minus_button (GtkScaleButton *button)
{
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
return button->priv->minus_button;
}
/**
* gtk_scale_button_get_popup:
* @button: a #GtkScaleButton
*
* Retrieves the popup of the #GtkScaleButton.
*
* Returns: (transfer none): the popup of the #GtkScaleButton
*
* Since: 2.14
*/
GtkWidget *
gtk_scale_button_get_popup (GtkScaleButton *button)
{
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
return button->priv->dock;
}
static void
gtk_scale_button_set_orientation_private (GtkScaleButton *button,
GtkOrientation orientation)
{
GtkScaleButtonPrivate *priv = button->priv;
if (orientation != priv->orientation)
{
priv->orientation = orientation;
gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->box),
orientation);
gtk_container_child_set (GTK_CONTAINER (priv->box),
priv->plus_button,
"pack-type",
orientation == GTK_ORIENTATION_VERTICAL ?
GTK_PACK_START : GTK_PACK_END,
NULL);
gtk_container_child_set (GTK_CONTAINER (priv->box),
priv->minus_button,
"pack-type",
orientation == GTK_ORIENTATION_VERTICAL ?
GTK_PACK_END : GTK_PACK_START,
NULL);
gtk_orientable_set_orientation (GTK_ORIENTABLE (priv->scale),
orientation);
if (orientation == GTK_ORIENTATION_VERTICAL)
{
gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
-1, SCALE_SIZE);
gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
}
else
{
gtk_widget_set_size_request (GTK_WIDGET (priv->scale),
SCALE_SIZE, -1);
gtk_range_set_inverted (GTK_RANGE (priv->scale), FALSE);
}
/* FIXME: without this, the popup window appears as a square
* after changing the orientation
*/
gtk_window_resize (GTK_WINDOW (priv->dock), 1, 1);
g_object_notify (G_OBJECT (button), "orientation");
}
}
/*
* button callbacks.
*/
static gboolean
gtk_scale_button_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adjustment;
gdouble d;
button = GTK_SCALE_BUTTON (widget);
priv = button->priv;
adjustment = priv->adjustment;
if (event->type != GDK_SCROLL)
return FALSE;
d = gtk_scale_button_get_value (button);
if (event->direction == GDK_SCROLL_UP)
{
d += gtk_adjustment_get_step_increment (adjustment);
if (d > gtk_adjustment_get_upper (adjustment))
d = gtk_adjustment_get_upper (adjustment);
}
else
{
d -= gtk_adjustment_get_step_increment (adjustment);
if (d < gtk_adjustment_get_lower (adjustment))
d = gtk_adjustment_get_lower (adjustment);
}
gtk_scale_button_set_value (button, d);
return TRUE;
}
static void
gtk_scale_button_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkScaleButton *button = (GtkScaleButton *) widget;
GtkScaleButtonPrivate *priv;
GdkScreen *screen;
GValue value = { 0, };
if (gtk_widget_has_screen (widget) == FALSE)
return;
priv = button->priv;
screen = gtk_widget_get_screen (widget);
g_value_init (&value, G_TYPE_INT);
if (gdk_screen_get_setting (screen,
"gtk-double-click-time",
&value) == FALSE)
{
priv->click_timeout = CLICK_TIMEOUT;
return;
}
priv->click_timeout = g_value_get_int (&value);
}
static gboolean
gtk_scale_popup (GtkWidget *widget,
GdkEvent *event,
guint32 time)
{
GtkAllocation allocation, dock_allocation, scale_allocation;
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adjustment;
gint x, y, m, dx, dy, sx, sy, startoff;
gint min_slider_size;
gdouble v;
GdkDisplay *display;
GdkScreen *screen;
gboolean is_moved;
GdkDevice *device, *keyboard, *pointer;
is_moved = FALSE;
button = GTK_SCALE_BUTTON (widget);
priv = button->priv;
adjustment = priv->adjustment;
display = gtk_widget_get_display (widget);
screen = gtk_widget_get_screen (widget);
gtk_widget_get_allocation (widget, &allocation);
/* position roughly */
gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
gdk_window_get_origin (gtk_widget_get_window (widget),
&x, &y);
x += allocation.x;
y += allocation.y;
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
else
gtk_window_move (GTK_WINDOW (priv->dock), x - (SCALE_SIZE / 2), y);
gtk_widget_show_all (priv->dock);
gdk_window_get_origin (gtk_widget_get_window (priv->dock),
&dx, &dy);
gtk_widget_get_allocation (priv->dock, &dock_allocation);
dx += dock_allocation.x;
dy += dock_allocation.y;
gdk_window_get_origin (gtk_widget_get_window (priv->scale),
&sx, &sy);
gtk_widget_get_allocation (priv->scale, &scale_allocation);
sx += scale_allocation.x;
sy += scale_allocation.y;
priv->timeout = TRUE;
/* position (needs widget to be shown already) */
v = gtk_scale_button_get_value (button) / (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment));
min_slider_size = gtk_range_get_min_slider_size (GTK_RANGE (priv->scale));
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
startoff = sy - dy;
x += (allocation.width - dock_allocation.width) / 2;
y -= startoff;
y -= min_slider_size / 2;
m = scale_allocation.height - min_slider_size;
y -= m * (1.0 - v);
}
else
{
startoff = sx - dx;
x -= startoff;
y += (allocation.height - dock_allocation.height) / 2;
x -= min_slider_size / 2;
m = scale_allocation.width - min_slider_size;
x -= m * v;
}
/* Make sure the dock stays inside the monitor */
if (event->type == GDK_BUTTON_PRESS)
{
GtkAllocation d_allocation;
int monitor;
GdkEventButton *button_event = (GdkEventButton *) event;
GdkRectangle rect;
GtkWidget *d;
d = GTK_WIDGET (priv->dock);
monitor = gdk_screen_get_monitor_at_point (screen,
button_event->x_root,
button_event->y_root);
gdk_screen_get_monitor_geometry (screen, monitor, &rect);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
y += button_event->y;
else
x += button_event->x;
/* Move the dock, but set is_moved so we
* don't forward the first click later on,
* as it could make the scale go to the bottom */
gtk_widget_get_allocation (d, &d_allocation);
if (y < rect.y)
{
y = rect.y;
is_moved = TRUE;
}
else if (y + d_allocation.height > rect.height + rect.y)
{
y = rect.y + rect.height - d_allocation.height;
is_moved = TRUE;
}
if (x < rect.x)
{
x = rect.x;
is_moved = TRUE;
}
else if (x + d_allocation.width > rect.width + rect.x)
{
x = rect.x + rect.width - d_allocation.width;
is_moved = TRUE;
}
}
gtk_window_move (GTK_WINDOW (priv->dock), x, y);
if (event->type == GDK_BUTTON_PRESS)
GTK_WIDGET_CLASS (gtk_scale_button_parent_class)->button_press_event (widget, (GdkEventButton *) event);
device = gdk_event_get_device (event);
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
{
keyboard = device;
pointer = gdk_device_get_associated_device (device);
}
else
{
pointer = device;
keyboard = gdk_device_get_associated_device (device);
}
/* grab focus */
gtk_device_grab_add (priv->dock, pointer, TRUE);
if (gdk_device_grab (pointer, gtk_widget_get_window (priv->dock),
GDK_OWNERSHIP_WINDOW, TRUE,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK, NULL, time) != GDK_GRAB_SUCCESS)
{
gtk_device_grab_remove (priv->dock, pointer);
gtk_widget_hide (priv->dock);
return FALSE;
}
if (gdk_device_grab (keyboard, gtk_widget_get_window (priv->dock),
GDK_OWNERSHIP_WINDOW, TRUE,
GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK,
NULL, time) != GDK_GRAB_SUCCESS)
{
gdk_device_ungrab (pointer, time);
gtk_device_grab_remove (priv->dock, pointer);
gtk_widget_hide (priv->dock);
return FALSE;
}
gtk_widget_grab_focus (priv->dock);
priv->grab_keyboard = keyboard;
priv->grab_pointer = pointer;
if (event->type == GDK_BUTTON_PRESS && !is_moved)
{
GdkEventButton *e;
GdkEventButton *button_event = (GdkEventButton *) event;
/* forward event to the slider */
e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
e->window = gtk_widget_get_window (priv->scale);
/* position: the X position isn't relevant, halfway will work just fine.
* The vertical position should be *exactly* in the middle of the slider
* of the scale; if we don't do that correctly, it'll move from its current
* position, which means a position change on-click, which is bad.
*/
gtk_widget_get_allocation (priv->scale, &scale_allocation);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
e->x = scale_allocation.width / 2;
m = scale_allocation.height - min_slider_size;
e->y = ((1.0 - v) * m) + min_slider_size / 2;
}
else
{
e->y = scale_allocation.height / 2;
m = scale_allocation.width - min_slider_size;
e->x = (v * m) + min_slider_size / 2;
}
gtk_widget_event (priv->scale, (GdkEvent *) e);
e->window = button_event->window;
gdk_event_free ((GdkEvent *) e);
}
gtk_widget_grab_focus (priv->scale);
priv->pop_time = time;
return TRUE;
}
static gboolean
gtk_scale_button_press (GtkWidget *widget,
GdkEventButton *event)
{
return gtk_scale_popup (widget, (GdkEvent *) event, event->time);
}
static void
gtk_scale_button_popup (GtkWidget *widget)
{
GdkEvent *ev;
/* This is a callback for a keybinding signal,
* current event should be the key event that
* triggered it.
*/
ev = gtk_get_current_event ();
if (ev->type != GDK_KEY_PRESS &&
ev->type != GDK_KEY_RELEASE)
{
gdk_event_free (ev);
ev = gdk_event_new (GDK_KEY_RELEASE);
ev->key.time = GDK_CURRENT_TIME;
}
gtk_scale_popup (widget, ev, ev->key.time);
gdk_event_free (ev);
}
static gboolean
gtk_scale_button_key_release (GtkWidget *widget,
GdkEventKey *event)
{
return gtk_bindings_activate_event (G_OBJECT (widget), event);
}
/* This is called when the grab is broken for
* either the dock, or the scale itself */
static void
gtk_scale_button_grab_notify (GtkScaleButton *button,
gboolean was_grabbed)
{
GdkDisplay *display;
GtkScaleButtonPrivate *priv;
GtkWidget *toplevel, *grab_widget;
GtkWindowGroup *group;
priv = button->priv;
if (!priv->grab_pointer ||
!gtk_widget_device_is_shadowed (GTK_WIDGET (button), priv->grab_pointer))
return;
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (button));
if (GTK_IS_WINDOW (toplevel))
group = gtk_window_get_group (GTK_WINDOW (toplevel));
else
group = gtk_window_get_group (NULL);
grab_widget = gtk_window_group_get_current_device_grab (group, priv->grab_pointer);
if (grab_widget &&
gtk_widget_is_ancestor (grab_widget, priv->dock))
return;
display = gtk_widget_get_display (priv->dock);
gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
gtk_device_grab_remove (priv->dock, priv->grab_pointer);
priv->grab_keyboard = NULL;
priv->grab_pointer = NULL;
/* hide again */
gtk_widget_hide (priv->dock);
priv->timeout = FALSE;
}
/*
* +/- button callbacks.
*/
static gboolean
cb_button_timeout (gpointer user_data)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adjustment;
gdouble val;
gboolean res = TRUE;
button = GTK_SCALE_BUTTON (user_data);
priv = button->priv;
if (priv->click_id == 0)
return FALSE;
adjustment = priv->adjustment;
val = gtk_scale_button_get_value (button);
val += priv->direction;
if (val <= gtk_adjustment_get_lower (adjustment))
{
res = FALSE;
val = gtk_adjustment_get_lower (adjustment);
}
else if (val > gtk_adjustment_get_upper (adjustment))
{
res = FALSE;
val = gtk_adjustment_get_upper (adjustment);
}
gtk_scale_button_set_value (button, val);
if (!res)
{
g_source_remove (priv->click_id);
priv->click_id = 0;
}
return res;
}
static gboolean
cb_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adjustment;
button = GTK_SCALE_BUTTON (user_data);
priv = button->priv;
adjustment = priv->adjustment;
if (priv->click_id != 0)
g_source_remove (priv->click_id);
if (widget == priv->plus_button)
priv->direction = fabs (gtk_adjustment_get_page_increment (adjustment));
else
priv->direction = - fabs (gtk_adjustment_get_page_increment (adjustment));
priv->click_id = gdk_threads_add_timeout (priv->click_timeout,
cb_button_timeout,
button);
cb_button_timeout (button);
return TRUE;
}
static gboolean
cb_button_release (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
button = GTK_SCALE_BUTTON (user_data);
priv = button->priv;
if (priv->click_id != 0)
{
g_source_remove (priv->click_id);
priv->click_id = 0;
}
return TRUE;
}
static void
cb_dock_grab_notify (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data)
{
GtkScaleButton *button = (GtkScaleButton *) user_data;
gtk_scale_button_grab_notify (button, was_grabbed);
}
static gboolean
cb_dock_grab_broken_event (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data)
{
GtkScaleButton *button = (GtkScaleButton *) user_data;
gtk_scale_button_grab_notify (button, FALSE);
return FALSE;
}
/*
* Scale callbacks.
*/
static void
gtk_scale_button_release_grab (GtkScaleButton *button,
GdkEventButton *event)
{
GdkEventButton *e;
GdkDisplay *display;
GtkScaleButtonPrivate *priv;
priv = button->priv;
/* ungrab focus */
display = gtk_widget_get_display (GTK_WIDGET (button));
gdk_device_ungrab (priv->grab_keyboard, event->time);
gdk_device_ungrab (priv->grab_pointer, event->time);
gtk_device_grab_remove (priv->dock, priv->grab_pointer);
priv->grab_keyboard = NULL;
priv->grab_pointer = NULL;
/* hide again */
gtk_widget_hide (priv->dock);
priv->timeout = FALSE;
e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
e->window = gtk_widget_get_window (GTK_WIDGET (button));
e->type = GDK_BUTTON_RELEASE;
gtk_widget_event (GTK_WIDGET (button), (GdkEvent *) e);
e->window = event->window;
gdk_event_free ((GdkEvent *) e);
}
static gboolean
cb_dock_button_press (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
GtkScaleButton *button = GTK_SCALE_BUTTON (user_data);
if (event->type == GDK_BUTTON_PRESS)
{
gtk_scale_button_release_grab (button, event);
return TRUE;
}
return FALSE;
}
static void
gtk_scale_button_popdown (GtkWidget *widget)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GdkDisplay *display;
button = GTK_SCALE_BUTTON (widget);
priv = button->priv;
/* ungrab focus */
display = gtk_widget_get_display (widget);
gdk_device_ungrab (priv->grab_keyboard, GDK_CURRENT_TIME);
gdk_device_ungrab (priv->grab_pointer, GDK_CURRENT_TIME);
gtk_device_grab_remove (priv->dock, priv->grab_pointer);
priv->grab_keyboard = NULL;
priv->grab_pointer = NULL;
/* hide again */
gtk_widget_hide (priv->dock);
priv->timeout = FALSE;
}
static gboolean
cb_dock_key_release (GtkWidget *widget,
GdkEventKey *event,
gpointer user_data)
{
if (event->keyval == GDK_KEY_Escape)
{
gtk_scale_button_popdown (GTK_WIDGET (user_data));
return TRUE;
}
if (!gtk_bindings_activate_event (G_OBJECT (widget), event))
{
/* The popup hasn't managed the event, pass onto the button */
gtk_bindings_activate_event (G_OBJECT (user_data), event);
}
return TRUE;
}
static void
cb_scale_grab_notify (GtkWidget *widget,
gboolean was_grabbed,
gpointer user_data)
{
GtkScaleButton *button = (GtkScaleButton *) user_data;
gtk_scale_button_grab_notify (button, was_grabbed);
}
/*
* Scale stuff.
*/
#define GTK_TYPE_SCALE_BUTTON_SCALE (_gtk_scale_button_scale_get_type ())
#define GTK_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_SCALE_BUTTON_SCALE, GtkScaleButtonScale))
#define GTK_IS_SCALE_BUTTON_SCALE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_SCALE_BUTTON_SCALE))
typedef struct _GtkScaleButtonScale
{
GtkScale parent_instance;
GtkScaleButton *button;
} GtkScaleButtonScale;
typedef struct _GtkScaleButtonScaleClass
{
GtkScaleClass parent_class;
} GtkScaleButtonScaleClass;
static gboolean gtk_scale_button_scale_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_scale_button_scale_release (GtkWidget *widget,
GdkEventButton *event);
G_DEFINE_TYPE (GtkScaleButtonScale, _gtk_scale_button_scale, GTK_TYPE_SCALE)
static void
_gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
{
GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
gtkwidget_class->button_press_event = gtk_scale_button_scale_press;
gtkwidget_class->button_release_event = gtk_scale_button_scale_release;
gtkrange_class->value_changed = gtk_scale_button_scale_value_changed;
}
static void
_gtk_scale_button_scale_init (GtkScaleButtonScale *scale)
{
}
static GtkWidget *
gtk_scale_button_scale_new (GtkScaleButton *button)
{
GtkScaleButtonPrivate *priv = button->priv;
GtkScaleButtonScale *scale;
scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE,
"orientation", priv->orientation,
"adjustment", priv->adjustment,
"draw-value", FALSE,
NULL);
scale->button = button;
g_signal_connect (scale, "grab-notify",
G_CALLBACK (cb_scale_grab_notify), button);
if (priv->orientation == GTK_ORIENTATION_VERTICAL)
{
gtk_widget_set_size_request (GTK_WIDGET (scale), -1, SCALE_SIZE);
gtk_range_set_inverted (GTK_RANGE (scale), TRUE);
}
else
{
gtk_widget_set_size_request (GTK_WIDGET (scale), SCALE_SIZE, -1);
gtk_range_set_inverted (GTK_RANGE (scale), FALSE);
}
return GTK_WIDGET (scale);
}
static gboolean
gtk_scale_button_scale_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkScaleButtonPrivate *priv = GTK_SCALE_BUTTON_SCALE (widget)->button->priv;
/* the scale will grab input; if we have input grabbed, all goes
* horribly wrong, so let's not do that.
*/
gtk_device_grab_remove (priv->dock, event->device);
return GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_press_event (widget, event);
}
static gboolean
gtk_scale_button_scale_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (widget)->button;
gboolean res;
if (button->priv->timeout)
{
/* if we did a quick click, leave the window open; else, hide it */
if (event->time > button->priv->pop_time + button->priv->click_timeout)
{
gtk_scale_button_release_grab (button, event);
GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
return TRUE;
}
button->priv->timeout = FALSE;
}
res = GTK_WIDGET_CLASS (_gtk_scale_button_scale_parent_class)->button_release_event (widget, event);
/* the scale will release input; right after that, we *have to* grab
* it back so we can catch out-of-scale clicks and hide the popup,
* so I basically want a g_signal_connect_after_always(), but I can't
* find that, so we do this complex 'first-call-parent-then-do-actual-
* action' thingy...
*/
gtk_device_grab_add (button->priv->dock, event->device, TRUE);
return res;
}
static void
gtk_scale_button_update_icon (GtkScaleButton *button)
{
GtkScaleButtonPrivate *priv;
GtkRange *range;
GtkAdjustment *adjustment;
gdouble value;
const gchar *name;
guint num_icons;
priv = button->priv;
if (!priv->icon_list || priv->icon_list[0] == '\0')
{
gtk_image_set_from_stock (GTK_IMAGE (priv->image),
GTK_STOCK_MISSING_IMAGE,
priv->size);
return;
}
num_icons = g_strv_length (priv->icon_list);
/* The 1-icon special case */
if (num_icons == 1)
{
gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
priv->icon_list[0],
priv->size);
return;
}
range = GTK_RANGE (priv->scale);
adjustment = priv->adjustment;
value = gtk_scale_button_get_value (button);
/* The 2-icons special case */
if (num_icons == 2)
{
gdouble limit;
limit = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / 2 + gtk_adjustment_get_lower (adjustment);
if (value < limit)
name = priv->icon_list[0];
else
name = priv->icon_list[1];
gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
name,
priv->size);
return;
}
/* With 3 or more icons */
if (value == gtk_adjustment_get_lower (adjustment))
{
name = priv->icon_list[0];
}
else if (value == gtk_adjustment_get_upper (adjustment))
{
name = priv->icon_list[1];
}
else
{
gdouble step;
guint i;
step = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / (num_icons - 2);
i = (guint) ((value - gtk_adjustment_get_lower (adjustment)) / step) + 2;
g_assert (i < num_icons);
name = priv->icon_list[i];
}
gtk_image_set_from_icon_name (GTK_IMAGE (priv->image),
name,
priv->size);
}
static void
gtk_scale_button_scale_value_changed (GtkRange *range)
{
GtkScaleButton *button = GTK_SCALE_BUTTON_SCALE (range)->button;
gdouble value;
value = gtk_range_get_value (range);
gtk_scale_button_update_icon (button);
g_signal_emit (button, signals[VALUE_CHANGED], 0, value);
g_object_notify (G_OBJECT (button), "value");
}
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