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gtk2/gtk/gtkscalebutton.c
Matthias Clasen 1c33042a57 Bring docs in shape 
svn path=/trunk/; revision=17935
2007-05-26 20:22:51 +00:00

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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>
#define _GNU_SOURCE
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "gtkmain.h"
#include "gtkintl.h"
#include "gtkrange.h"
#include "gtkbindings.h"
#include "gtkscale.h"
#include "gtkvscale.h"
#include "gtkframe.h"
#include "gtkvbox.h"
#include "gtkwindow.h"
#include "gtkmarshalers.h"
#include "gtkstock.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkkeysyms.h>
#include "gtkscalebutton.h"
#include "gtkalias.h"
#define SCALE_SIZE 100
#define CLICK_TIMEOUT 250
enum {
VALUE_CHANGED,
POPUP,
POPDOWN,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_VALUE,
PROP_SIZE,
PROP_ADJUSTMENT
};
struct _GtkScaleButtonPrivate {
GtkWidget *dock, *scale, *image;
GtkIconSize size;
guint click_id;
gdouble direction;
guint32 pop_time;
gchar **icon_list;
gint click_timeout;
guint timeout : 1;
} _GtkScaleButtonPrivate;
static void gtk_scale_button_class_init (GtkScaleButtonClass *klass);
static void gtk_scale_button_init (GtkScaleButton *button);
static void gtk_scale_button_dispose (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 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_from_bindings (GtkWidget *widget);
static void gtk_scale_button_popdown_from_bindings (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,
gdouble min,
gdouble max,
gdouble step);
static GtkButtonClass *parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GtkScaleButton, gtk_scale_button, GTK_TYPE_BUTTON)
static void
gtk_scale_button_class_init (GtkScaleButtonClass *klass)
{
GtkBindingSet *binding_set;
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
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;
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,
G_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,
G_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,
G_PARAM_READWRITE));
/**
* GtkScaleButton::value-changed:
* @button: the object that received the signal
*
* 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);
signals[POPUP] =
_gtk_binding_signal_new (I_("popup"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_scale_button_popup_from_bindings),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
signals[POPDOWN] =
_gtk_binding_signal_new (I_("popdown"),
G_OBJECT_CLASS_TYPE (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_scale_button_popdown_from_bindings),
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_space, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Return, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_ISO_Enter, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_KP_Enter, 0,
"popup", 0);
gtk_binding_entry_add_signal (binding_set, GDK_Escape, 0,
"popdown", 0);
}
static void
gtk_scale_button_init (GtkScaleButton *button)
{
GtkWidget *frame, *box;
GtkScaleButtonPrivate *priv;
button->priv = g_new0 (GtkScaleButtonPrivate, 1);
priv = button->priv;
priv->timeout = FALSE;
priv->click_id = 0;
priv->click_timeout = CLICK_TIMEOUT;
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);
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 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), box);
/* + */
button->plus_button = gtk_button_new_with_label ("+");
gtk_button_set_relief (GTK_BUTTON (button->plus_button), GTK_RELIEF_NONE);
g_signal_connect (button->plus_button, "button-press-event",
G_CALLBACK (cb_button_press), button);
g_signal_connect (button->plus_button, "button-release-event",
G_CALLBACK (cb_button_release), button);
gtk_box_pack_start (GTK_BOX (box), button->plus_button, TRUE, FALSE, 0);
/* scale */
priv->scale = gtk_scale_button_scale_new (button, 0., 100., 2.);
gtk_widget_set_size_request (priv->scale, -1, SCALE_SIZE);
gtk_scale_set_draw_value (GTK_SCALE (priv->scale), FALSE);
gtk_range_set_inverted (GTK_RANGE (priv->scale), TRUE);
gtk_box_pack_start (GTK_BOX (box), priv->scale, TRUE, FALSE, 0);
g_signal_connect (priv->scale, "grab-notify",
G_CALLBACK (cb_scale_grab_notify), button);
/* - */
button->minus_button = gtk_button_new_with_label ("-");
gtk_button_set_relief (GTK_BUTTON (button->minus_button), GTK_RELIEF_NONE);
g_signal_connect (button->minus_button, "button-press-event",
G_CALLBACK (cb_button_press), button);
g_signal_connect (button->minus_button, "button-release-event",
G_CALLBACK (cb_button_release), button);
gtk_box_pack_start (GTK_BOX (box), button->minus_button, TRUE, FALSE, 0);
/* set button text and size */
priv->size = GTK_ICON_SIZE_SMALL_TOOLBAR;
gtk_scale_button_update_icon (button);
}
static void
gtk_scale_button_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkScaleButton *button;
button = GTK_SCALE_BUTTON (object);
switch (prop_id)
{
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;
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;
GtkScaleButtonPrivate *priv;
button = GTK_SCALE_BUTTON (object);
priv = button->priv;
switch (prop_id)
{
case PROP_VALUE:
g_value_set_float (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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_scale_button_dispose (GObject *object)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
button = GTK_SCALE_BUTTON (object);
priv = button->priv;
if (priv && priv->dock)
{
gtk_widget_destroy (priv->dock);
priv->dock = NULL;
}
if (priv && priv->click_id != 0)
{
g_source_remove (priv->click_id);
priv->click_id = 0;
}
if (priv && priv->icon_list)
{
g_strfreev (priv->icon_list);
priv->icon_list = NULL;
}
g_free (priv);
button->priv = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/**
* gtk_scale_button_new
* @size: 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: 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;
GtkScaleButtonPrivate *priv;
button = g_object_new (GTK_TYPE_SCALE_BUTTON, NULL);
priv = button->priv;
if (icons != NULL)
gtk_scale_button_set_icons (button, icons);
gtk_range_set_range (GTK_RANGE (priv->scale), min, max);
gtk_range_set_increments (GTK_RANGE (priv->scale), step, 10 * step);
if (priv->size != size)
{
priv->size = size;
gtk_scale_button_update_icon (button);
}
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_range_get_value (GTK_RANGE (priv->scale));
}
/**
* 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 "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: a %NULL-terminated array of icon names
*
* Sets 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 in the @icons array, it will be used for all the
* values. If only two icons 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%.
* So 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
*/
void
gtk_scale_button_set_icons (GtkScaleButton *button,
const gchar **icons)
{
GtkScaleButtonPrivate *priv;
g_return_if_fail (GTK_IS_SCALE_BUTTON (button));
g_return_if_fail (icons != NULL);
g_return_if_fail (icons[0] != NULL);
priv = button->priv;
g_strfreev (priv->icon_list);
priv->icon_list = g_strdupv ((gchar **) icons);
gtk_scale_button_update_icon (button);
}
/**
* 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: the adjustment associated with the scale
*
* Since: 2.12
*/
GtkAdjustment*
gtk_scale_button_get_adjustment (GtkScaleButton *button)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL);
range = GTK_RANGE (button->priv->scale);
g_return_val_if_fail (range != NULL, NULL);
return gtk_range_get_adjustment (range);
}
/**
* 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));
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
gtk_range_set_adjustment (GTK_RANGE (button->priv->scale),
adjustment);
}
/*
* button callbacks.
*/
static gboolean
gtk_scale_button_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adj;
gdouble d;
button = GTK_SCALE_BUTTON (widget);
priv = button->priv;
adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
if (event->type != GDK_SCROLL)
return FALSE;
d = gtk_scale_button_get_value (button);
if (event->direction == GDK_SCROLL_UP)
{
d += adj->step_increment;
if (d > adj->upper)
d = adj->upper;
}
else
{
d -= adj->step_increment;
if (d < adj->lower)
d = adj->lower;
}
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)
{
GtkScaleButton *button;
GtkScaleButtonPrivate *priv;
GtkAdjustment *adj;
gint x, y, m, dx, dy, sx, sy, ystartoff;
gdouble v;
GdkDisplay *display;
GdkScreen *screen;
button = GTK_SCALE_BUTTON (widget);
priv = button->priv;
adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
display = gtk_widget_get_display (widget);
screen = gtk_widget_get_screen (widget);
/* position roughly */
gtk_window_set_screen (GTK_WINDOW (priv->dock), screen);
gdk_window_get_origin (widget->window, &x, &y);
x += widget->allocation.x;
y += widget->allocation.y;
gtk_window_move (GTK_WINDOW (priv->dock), x, y - (SCALE_SIZE / 2));
gtk_widget_show_all (priv->dock);
gdk_window_get_origin (priv->dock->window, &dx, &dy);
dy += priv->dock->allocation.y;
gdk_window_get_origin (priv->scale->window, &sx, &sy);
sy += priv->scale->allocation.y;
ystartoff = sy - dy;
priv->timeout = TRUE;
/* position (needs widget to be shown already) */
v = gtk_scale_button_get_value (button) / (adj->upper - adj->lower);
x += (widget->allocation.width - priv->dock->allocation.width) / 2;
y -= ystartoff;
y -= GTK_RANGE (priv->scale)->min_slider_size / 2;
m = priv->scale->allocation.height -
GTK_RANGE (priv->scale)->min_slider_size;
y -= m * (1.0 - v);
/* Make sure the dock stays inside the monitor */
if (event->type == GDK_BUTTON_PRESS)
{
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);
y += button_event->y;
if (y < rect.y)
y = rect.y;
else if (y + d->allocation.height > rect.height + rect.y)
y = rect.y + rect.height - d->allocation.height;
if (x < rect.x)
x = rect.x;
else if (x + d->allocation.width > rect.width + rect.x)
x = rect.x + rect.width - d->allocation.width;
}
gtk_window_move (GTK_WINDOW (priv->dock), x, y);
if (event->type == GDK_BUTTON_PRESS)
GTK_WIDGET_CLASS (parent_class)->button_press_event (widget, (GdkEventButton *) event);
/* grab focus */
gtk_grab_add (priv->dock);
if (gdk_pointer_grab (priv->dock->window, TRUE,
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK |
GDK_POINTER_MOTION_MASK, NULL, NULL, time)
!= GDK_GRAB_SUCCESS)
{
gtk_grab_remove (priv->dock);
gtk_widget_hide (priv->dock);
return FALSE;
}
if (gdk_keyboard_grab (priv->dock->window, TRUE, time) != GDK_GRAB_SUCCESS)
{
gdk_display_pointer_ungrab (display, time);
gtk_grab_remove (priv->dock);
gtk_widget_hide (priv->dock);
return FALSE;
}
gtk_widget_grab_focus (priv->dock);
if (event->type == GDK_BUTTON_PRESS)
{
GdkEventButton *e;
GdkEventButton *button_event = (GdkEventButton *) event;
/* forward event to the slider */
e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
e->window = priv->scale->window;
/* 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. */
e->x = priv->scale->allocation.width / 2;
m = priv->scale->allocation.height -
GTK_RANGE (priv->scale)->min_slider_size;
e->y = ((1.0 - v) * m) + GTK_RANGE (priv->scale)->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_from_bindings (GtkWidget *widget)
{
GdkEvent *ev;
ev = gdk_event_new (GDK_KEY_RELEASE);
gtk_scale_popup (widget, ev, GDK_CURRENT_TIME);
gdk_event_free (ev);
}
static gboolean
gtk_scale_button_key_release (GtkWidget *widget,
GdkEventKey *event)
{
return gtk_bindings_activate_event (GTK_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;
if (was_grabbed != FALSE)
return;
priv = button->priv;
if (gtk_widget_is_ancestor (gtk_grab_get_current (), priv->dock))
return;
display = gtk_widget_get_display (priv->dock);
gdk_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
gtk_grab_remove (priv->dock);
/* 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 *adj;
gdouble val;
gboolean res = TRUE;
button = GTK_SCALE_BUTTON (user_data);
priv = button->priv;
if (priv->click_id == 0)
return FALSE;
adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
val = gtk_scale_button_get_value (button);
val += priv->direction;
if (val <= adj->lower)
{
res = FALSE;
val = adj->lower;
}
else if (val > adj->upper)
{
res = FALSE;
val = adj->upper;
}
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 *adj;
button = GTK_SCALE_BUTTON (user_data);
priv = button->priv;
adj = gtk_range_get_adjustment (GTK_RANGE (priv->scale));
if (priv->click_id != 0)
g_source_remove (priv->click_id);
if (widget == button->plus_button)
priv->direction = fabs (adj->page_increment);
else
priv->direction = - fabs (adj->page_increment);
priv->click_id = g_timeout_add (priv->click_timeout,
(GSourceFunc) 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_display_keyboard_ungrab (display, event->time);
gdk_display_pointer_ungrab (display, event->time);
gtk_grab_remove (priv->dock);
/* hide again */
gtk_widget_hide (priv->dock);
priv->timeout = FALSE;
e = (GdkEventButton *) gdk_event_copy ((GdkEvent *) event);
e->window = GTK_WIDGET (button)->window;
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_from_bindings (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_display_keyboard_ungrab (display, GDK_CURRENT_TIME);
gdk_display_pointer_ungrab (display, GDK_CURRENT_TIME);
gtk_grab_remove (priv->dock);
/* 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_Escape)
{
gtk_scale_button_popdown_from_bindings (GTK_WIDGET (user_data));
return TRUE;
}
if (!gtk_bindings_activate_event (GTK_OBJECT (widget), event))
{
/* The popup hasn't managed the event, pass onto the button */
gtk_bindings_activate_event (GTK_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))
typedef struct _GtkScaleButtonScaleClass {
GtkVScaleClass parent_class;
} GtkScaleButtonScaleClass;
typedef struct _GtkScaleButtonScale {
GtkVScale parent;
GtkScaleButton *button;
} GtkScaleButtonScale;
static GType gtk_scale_button_scale_get_type (void);
static void gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass);
static gboolean gtk_scale_button_scale_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_scale_button_scale_release (GtkWidget *widget,
GdkEventButton *event);
static GtkVScaleClass *scale_parent_class = NULL;
G_DEFINE_TYPE (GtkScaleButtonScale, gtk_scale_button_scale, GTK_TYPE_VSCALE)
static void
gtk_scale_button_scale_class_init (GtkScaleButtonScaleClass *klass)
{
GtkWidgetClass *gtkwidget_class = GTK_WIDGET_CLASS (klass);
GtkRangeClass *gtkrange_class = GTK_RANGE_CLASS (klass);
scale_parent_class = g_type_class_peek_parent (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,
gdouble min,
gdouble max,
gdouble step)
{
GtkScaleButtonScale *scale;
GtkScaleButtonPrivate *priv;
GtkObject *adj;
priv = button->priv;
scale = g_object_new (GTK_TYPE_SCALE_BUTTON_SCALE, NULL);
adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
gtk_range_set_adjustment (GTK_RANGE (scale), GTK_ADJUSTMENT (adj));
scale->button = button;
return GTK_WIDGET (scale);
}
static gboolean
gtk_scale_button_scale_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkScaleButtonScale *scale;
GtkScaleButtonPrivate *priv;
scale = GTK_SCALE_BUTTON_SCALE (widget);
priv = scale->button->priv;
/* the scale will grab input; if we have input grabbed, all goes
* horribly wrong, so let's not do that. */
gtk_grab_remove (priv->dock);
return GTK_WIDGET_CLASS (scale_parent_class)->button_press_event (widget, event);
}
static gboolean
gtk_scale_button_scale_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkScaleButtonScale *scale;
GtkScaleButtonPrivate *priv;
gboolean res;
scale = GTK_SCALE_BUTTON_SCALE (widget);
priv = scale->button->priv;
if (priv->timeout)
{
/* if we did a quick click, leave the window open; else, hide it */
if (event->time > priv->pop_time + priv->click_timeout)
{
gtk_scale_button_release_grab (scale->button, event);
GTK_WIDGET_CLASS (scale_parent_class)->button_release_event (widget, event);
return TRUE;
}
priv->timeout = FALSE;
}
res = GTK_WIDGET_CLASS (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_grab_add (priv->dock);
return res;
}
static void
gtk_scale_button_update_icon (GtkScaleButton *button)
{
GtkScaleButtonPrivate *priv;
GtkRange *range;
GtkAdjustment *adj;
gdouble value;
const gchar *name;
guint num_icons;
priv = button->priv;
if (priv->icon_list == NULL || priv->icon_list[0] == NULL)
{
gtk_image_set_from_stock (GTK_IMAGE (priv->image),
GTK_STOCK_MISSING_IMAGE,
priv->size);
return;
}
for (num_icons = 0; priv->icon_list[num_icons] != NULL; num_icons++) {}
/* 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);
adj = gtk_range_get_adjustment (range);
value = gtk_scale_button_get_value (button);
/* The 2-icons special case */
if (num_icons == 2)
{
gdouble limit;
limit = (adj->upper - adj->lower) / 2 + adj->lower;
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 == adj->lower)
{
name = priv->icon_list[0];
}
else if (value == adj->upper)
{
name = priv->icon_list[1];
}
else
{
gdouble step;
guint i;
step = (adj->upper - adj->lower) / (num_icons - 2);
i = (guint) (value - adj->lower) / 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)
{
GtkScaleButtonScale *scale = GTK_SCALE_BUTTON_SCALE (range);
GtkScaleButton *button = scale->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");
}
#define __GTK_SCALE_BUTTON_C__
#include "gtkaliasdef.c"
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