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Provide information about how an adjustment change in a range widget

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Thu Aug 26 22:44:12 2004  Matthias Clasen  <maclas@gmx.de>

	Provide information about how an adjustment change in a range
	widget happened. Add a "slider-moved" signal which reports how
	a user is interacting with the range, whether they are clicking
	on a stepper or the trough, or dragging the slider.  (#133263,
	Thomas Fitzsimmons)

	* gtk/gtkmarshalers.list: Add signal type BOOLEAN:ENUM,DOUBLE.
	* gtk/gtkrange.c (gtk_range_class_init): Add "change-value"
	signal.
	(gtk_range_internal_set_value): Rename to
	gtk_range_real_change_value.  Add GtkScrollType parameter.  Emit
	the change-value signal when the range's value changes.
	(update_slider_position, gtk_range_scroll_event, step_back,
	step_forward, page_back, page_forward, scroll_begin,
	scroll_end): Change gtk_range_internal_set_value to
	gtk_range_real_change_value.
	* gtk/gtkrange.h (struct _GtkRangeClass): Declare change_value
	function.
This commit is contained in:
Matthias Clasen 2004-08-27 02:54:12 +00:00 committed by Matthias Clasen
parent 24dd1030f0
commit 01bc563147
7 changed files with 167 additions and 16 deletions
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21
ChangeLog
View File

@ -1,3 +1,24 @@
Thu Aug 26 22:44:12 2004 Matthias Clasen <maclas@gmx.de>
Provide information about how an adjustment change in a range
widget happened. Add a "slider-moved" signal which reports how
a user is interacting with the range, whether they are clicking
on a stepper or the trough, or dragging the slider. (#133263,
Thomas Fitzsimmons)
* gtk/gtkmarshalers.list: Add signal type BOOLEAN:ENUM,DOUBLE.
* gtk/gtkrange.c (gtk_range_class_init): Add "change-value"
signal.
(gtk_range_internal_set_value): Rename to
gtk_range_real_change_value. Add GtkScrollType parameter. Emit
the change-value signal when the range's value changes.
(update_slider_position, gtk_range_scroll_event, step_back,
step_forward, page_back, page_forward, scroll_begin,
scroll_end): Change gtk_range_internal_set_value to
gtk_range_real_change_value.
* gtk/gtkrange.h (struct _GtkRangeClass): Declare change_value
function.
2004-08-26 Matthias Clasen <mclasen@redhat.com>
* modules/input/Makefile.am: Build imime.la on Windows.

21
ChangeLog.pre-2-10
View File

@ -1,3 +1,24 @@
Thu Aug 26 22:44:12 2004 Matthias Clasen <maclas@gmx.de>
Provide information about how an adjustment change in a range
widget happened. Add a "slider-moved" signal which reports how
a user is interacting with the range, whether they are clicking
on a stepper or the trough, or dragging the slider. (#133263,
Thomas Fitzsimmons)
* gtk/gtkmarshalers.list: Add signal type BOOLEAN:ENUM,DOUBLE.
* gtk/gtkrange.c (gtk_range_class_init): Add "change-value"
signal.
(gtk_range_internal_set_value): Rename to
gtk_range_real_change_value. Add GtkScrollType parameter. Emit
the change-value signal when the range's value changes.
(update_slider_position, gtk_range_scroll_event, step_back,
step_forward, page_back, page_forward, scroll_begin,
scroll_end): Change gtk_range_internal_set_value to
gtk_range_real_change_value.
* gtk/gtkrange.h (struct _GtkRangeClass): Declare change_value
function.
2004-08-26 Matthias Clasen <mclasen@redhat.com>
* modules/input/Makefile.am: Build imime.la on Windows.

21
ChangeLog.pre-2-6
View File

@ -1,3 +1,24 @@
Thu Aug 26 22:44:12 2004 Matthias Clasen <maclas@gmx.de>
Provide information about how an adjustment change in a range
widget happened. Add a "slider-moved" signal which reports how
a user is interacting with the range, whether they are clicking
on a stepper or the trough, or dragging the slider. (#133263,
Thomas Fitzsimmons)
* gtk/gtkmarshalers.list: Add signal type BOOLEAN:ENUM,DOUBLE.
* gtk/gtkrange.c (gtk_range_class_init): Add "change-value"
signal.
(gtk_range_internal_set_value): Rename to
gtk_range_real_change_value. Add GtkScrollType parameter. Emit
the change-value signal when the range's value changes.
(update_slider_position, gtk_range_scroll_event, step_back,
step_forward, page_back, page_forward, scroll_begin,
scroll_end): Change gtk_range_internal_set_value to
gtk_range_real_change_value.
* gtk/gtkrange.h (struct _GtkRangeClass): Declare change_value
function.
2004-08-26 Matthias Clasen <mclasen@redhat.com>
* modules/input/Makefile.am: Build imime.la on Windows.

21
ChangeLog.pre-2-8
View File

@ -1,3 +1,24 @@
Thu Aug 26 22:44:12 2004 Matthias Clasen <maclas@gmx.de>
Provide information about how an adjustment change in a range
widget happened. Add a "slider-moved" signal which reports how
a user is interacting with the range, whether they are clicking
on a stepper or the trough, or dragging the slider. (#133263,
Thomas Fitzsimmons)
* gtk/gtkmarshalers.list: Add signal type BOOLEAN:ENUM,DOUBLE.
* gtk/gtkrange.c (gtk_range_class_init): Add "change-value"
signal.
(gtk_range_internal_set_value): Rename to
gtk_range_real_change_value. Add GtkScrollType parameter. Emit
the change-value signal when the range's value changes.
(update_slider_position, gtk_range_scroll_event, step_back,
step_forward, page_back, page_forward, scroll_begin,
scroll_end): Change gtk_range_internal_set_value to
gtk_range_real_change_value.
* gtk/gtkrange.h (struct _GtkRangeClass): Declare change_value
function.
2004-08-26 Matthias Clasen <mclasen@redhat.com>
* modules/input/Makefile.am: Build imime.la on Windows.

1
gtk/gtkmarshalers.list
View File

@ -24,6 +24,7 @@
BOOLEAN:BOXED
BOOLEAN:BOXED,BOXED
BOOLEAN:ENUM
BOOLEAN:ENUM,DOUBLE
BOOLEAN:ENUM,INT
BOOLEAN:OBJECT,UINT,FLAGS
BOOLEAN:OBJECT,INT,INT,UINT

93
gtk/gtkrange.c
View File

@ -19,7 +19,7 @@
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* Modified by the GTK+ Team and others 1997-2004. 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/.
@ -51,6 +51,7 @@ enum {
VALUE_CHANGED,
ADJUST_BOUNDS,
MOVE_SLIDER,
CHANGE_VALUE,
LAST_SIGNAL
};
@ -173,8 +174,10 @@ static void gtk_range_reset_update_timer (GtkRange *range);
static void gtk_range_remove_update_timer (GtkRange *range);
static GdkRectangle* get_area (GtkRange *range,
MouseLocation location);
static void gtk_range_internal_set_value (GtkRange *range,
gdouble value);
static gboolean gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
gpointer data);
static void gtk_range_update_value (GtkRange *range);
@ -246,6 +249,7 @@ gtk_range_class_init (GtkRangeClass *class)
widget_class->style_set = gtk_range_style_set;
class->move_slider = gtk_range_move_slider;
class->change_value = gtk_range_real_change_value;
class->slider_detail = "slider";
class->stepper_detail = "stepper";
@ -278,6 +282,43 @@ gtk_range_class_init (GtkRangeClass *class)
_gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
/**
* GtkRange::change-value:
* @range: the range that received the signal.
* @scroll: the type of scroll action that was performed.
* @value: the new value resulting from the scroll action.
* @returns: %TRUE to prevent other handlers from being invoked for the
* signal. %FALSE to propagate the signal further.
*
* The ::change-value signal is emitted when a scroll action is
* performed on a range. It allows an application to determine the
* type of scroll event that occurred and the resultant new value.
* The application can handle the event itself and return %TRUE to
* prevent further processing. Or, by returning %FALSE, it can pass
* the event to other handlers until the default GTK+ handler is
* reached.
*
* The value parameter is unrounded. An application that overrides
* the ::change-value signal is responsible for clamping the value to
* the desired number of digits; the default GTK+ handler clamps the
* value based on @range->round_digits.
*
* It is not possible to use delayed update policies in an overridden
* ::change-value handler.
*
* Since: 2.6
*/
signals[CHANGE_VALUE] =
g_signal_new ("change_value",
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkRangeClass, change_value),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__ENUM_DOUBLE,
G_TYPE_BOOLEAN, 2,
GTK_TYPE_SCROLL_TYPE,
G_TYPE_DOUBLE);
g_object_class_install_property (gobject_class,
PROP_UPDATE_POLICY,
@ -1310,7 +1351,8 @@ update_slider_position (GtkRange *range,
gint delta;
gint c;
gdouble new_value;
gboolean handled;
if (range->orientation == GTK_ORIENTATION_VERTICAL)
delta = mouse_y - range->slide_initial_coordinate;
else
@ -1320,7 +1362,8 @@ update_slider_position (GtkRange *range,
new_value = coord_to_value (range, c);
gtk_range_internal_set_value (range, new_value);
g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value,
&handled);
}
static void stop_scrolling (GtkRange *range)
@ -1411,9 +1454,13 @@ gtk_range_scroll_event (GtkWidget *widget,
{
GtkAdjustment *adj = GTK_RANGE (range)->adjustment;
gdouble delta;
gboolean handled;
delta = _gtk_range_get_wheel_delta (range, event->direction);
gtk_range_internal_set_value (range, adj->value + delta);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_JUMP, adj->value + delta,
&handled);
/* Policy DELAYED makes sense with scroll events,
* but DISCONTINUOUS doesn't, so we update immediately
@ -1553,18 +1600,22 @@ static void
step_back (GtkRange *range)
{
gdouble newval;
gboolean handled;
newval = range->adjustment->value - range->adjustment->step_increment;
gtk_range_internal_set_value (range, newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_STEP_BACKWARD, newval, &handled);
}
static void
step_forward (GtkRange *range)
{
gdouble newval;
gboolean handled;
newval = range->adjustment->value + range->adjustment->step_increment;
gtk_range_internal_set_value (range, newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_STEP_FORWARD, newval, &handled);
}
@ -1572,33 +1623,42 @@ static void
page_back (GtkRange *range)
{
gdouble newval;
gboolean handled;
newval = range->adjustment->value - range->adjustment->page_increment;
gtk_range_internal_set_value (range, newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_PAGE_BACKWARD, newval, &handled);
}
static void
page_forward (GtkRange *range)
{
gdouble newval;
gboolean handled;
newval = range->adjustment->value + range->adjustment->page_increment;
gtk_range_internal_set_value (range, newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_PAGE_FORWARD, newval, &handled);
}
static void
scroll_begin (GtkRange *range)
{
gtk_range_internal_set_value (range, range->adjustment->lower);
gboolean handled;
g_signal_emit (range, signals[CHANGE_VALUE], 0,
GTK_SCROLL_START, range->adjustment->lower,
&handled);
}
static void
scroll_end (GtkRange *range)
{
gdouble newval;
gboolean handled;
newval = range->adjustment->upper - range->adjustment->page_size;
gtk_range_internal_set_value (range, newval);
g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval,
&handled);
}
static void
@ -2322,9 +2382,11 @@ get_area (GtkRange *range,
return NULL;
}
static void
gtk_range_internal_set_value (GtkRange *range,
gdouble value)
static gboolean
gtk_range_real_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
gpointer data)
{
/* potentially adjust the bounds _before we clamp */
g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value);
@ -2367,6 +2429,7 @@ gtk_range_internal_set_value (GtkRange *range,
break;
}
}
return FALSE;
}
static void

5
gtk/gtkrange.h
View File

@ -120,11 +120,14 @@ struct _GtkRangeClass
void (* get_range_border) (GtkRange *range,
GtkBorder *border_);
gboolean (* change_value) (GtkRange *range,
GtkScrollType scroll,
gdouble new_value);
/* Padding for future expansion */
void (*_gtk_reserved1) (void);
void (*_gtk_reserved2) (void);
void (*_gtk_reserved3) (void);
void (*_gtk_reserved4) (void);
};