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gtk2/gtk/gtkrange.c
Tim Janik 8589cfa17a add GDK_THREADS_ENTER/GDK_THREADS_LEAVE. (gtk_range_calc_layout): compute 
Sat Jul 14 12:47:35 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtkrange.c:
        (second_timeout):
        (initial_timeout):
        (update_timeout): add GDK_THREADS_ENTER/GDK_THREADS_LEAVE.
        (gtk_range_calc_layout): compute the new layout based on an
        adjustment->value being passed in as argument.
        (gtk_range_button_press): for button2 slider warps, first recalc
        the layout, then adjust the value. also, use update_slider_position()
        for adjusting the value, so we keep pixel quantisation at which we
        usually operate (upon motion or button releases). the reason for this
        is that, we can't change the adjustment upon button2 presses to a non
        quantised value and upon button2 release re-quantise the value since
        that'd alter the value even if we didn't get any motion events (causing
        unexpected scroll area warps upon release and/or slider pixel-jitter).
        (gtk_range_motion_notify): update the slider position from queried
        coordinates, not event coordinates.

Fri Jul 13 09:47:52 2001  Tim Janik  <timj@gtk.org>

        * gtk/gtkstyle.c (gtk_default_draw_focus): fix line style resetting,
        the default gc values are: width=0, CapBut, JoinMiter.
2001-07-14 11:35:24 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
* Copyright (C) 2001 Red Hat, Inc.
*
* 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 1997-2000. 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 <stdio.h>
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkrange.h"
#include "gtksignal.h"
#include "gtkintl.h"
#define SCROLL_INITIAL_DELAY 250 /* must hold button this long before ... */
#define SCROLL_LATER_DELAY 100 /* ... it starts repeating at this rate */
#define UPDATE_DELAY 300 /* Delay for queued update */
enum {
PROP_0,
PROP_UPDATE_POLICY,
PROP_ADJUSTMENT,
PROP_INVERTED
};
enum {
VALUE_CHANGED,
MOVE_SLIDER,
LAST_SIGNAL
};
typedef enum {
MOUSE_OUTSIDE,
MOUSE_STEPPER_A,
MOUSE_STEPPER_B,
MOUSE_STEPPER_C,
MOUSE_STEPPER_D,
MOUSE_TROUGH,
MOUSE_SLIDER,
MOUSE_WIDGET /* inside widget but not in any of the above GUI elements */
} MouseLocation;
struct _GtkRangeLayout
{
/* These are in widget->window coordinates */
GdkRectangle stepper_a;
GdkRectangle stepper_b;
GdkRectangle stepper_c;
GdkRectangle stepper_d;
/* The trough rectangle is the area the thumb can slide in, not the
* entire range_rect
*/
GdkRectangle trough;
GdkRectangle slider;
/* Layout-related state */
MouseLocation mouse_location;
/* last mouse coords we got, or -1 if mouse is outside the range */
gint mouse_x;
gint mouse_y;
/* "grabbed" mouse location, OUTSIDE for no grab */
MouseLocation grab_location;
gint grab_button; /* 0 if none */
};
static void gtk_range_class_init (GtkRangeClass *klass);
static void gtk_range_init (GtkRange *range);
static void gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_range_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_range_destroy (GtkObject *object);
static void gtk_range_finalize (GObject *object);
static void gtk_range_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_range_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_range_realize (GtkWidget *widget);
static void gtk_range_unrealize (GtkWidget *widget);
static gint gtk_range_expose (GtkWidget *widget,
GdkEventExpose *event);
static gint gtk_range_button_press (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_range_button_release (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_range_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gint gtk_range_enter_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gint gtk_range_leave_notify (GtkWidget *widget,
GdkEventCrossing *event);
static gint gtk_range_scroll_event (GtkWidget *widget,
GdkEventScroll *event);
static void gtk_range_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static void update_slider_position (GtkRange *range,
gint mouse_x,
gint mouse_y);
/* Range methods */
static void gtk_range_move_slider (GtkRange *range,
GtkScrollType scroll);
/* Internals */
static void gtk_range_scroll (GtkRange *range,
GtkScrollType scroll);
static gboolean gtk_range_update_mouse_location (GtkRange *range);
static void gtk_range_calc_layout (GtkRange *range,
gdouble adjustment_value);
static void gtk_range_get_props (GtkRange *range,
gint *slider_width,
gint *stepper_size,
gint *trough_border,
gint *stepper_spacing);
static void gtk_range_calc_request (GtkRange *range,
gint slider_width,
gint stepper_size,
gint trough_border,
gint stepper_spacing,
GdkRectangle *range_rect,
GtkBorder *border,
gint *n_steppers_p,
gint *slider_length_p);
static void gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_range_adjustment_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_range_add_step_timer (GtkRange *range,
GtkScrollType step);
static void gtk_range_remove_step_timer (GtkRange *range);
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 void gtk_range_update_value (GtkRange *range);
static GtkWidgetClass *parent_class = NULL;
static guint signals[LAST_SIGNAL];
GtkType
gtk_range_get_type (void)
{
static GtkType range_type = 0;
if (!range_type)
{
static const GtkTypeInfo range_info =
{
"GtkRange",
sizeof (GtkRange),
sizeof (GtkRangeClass),
(GtkClassInitFunc) gtk_range_class_init,
(GtkObjectInitFunc) gtk_range_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
range_type = gtk_type_unique (GTK_TYPE_WIDGET, &range_info);
}
return range_type;
}
static void
gtk_range_class_init (GtkRangeClass *class)
{
GObjectClass *gobject_class;
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = g_type_class_peek_parent (class);
gobject_class->set_property = gtk_range_set_property;
gobject_class->get_property = gtk_range_get_property;
gobject_class->finalize = gtk_range_finalize;
object_class->destroy = gtk_range_destroy;
widget_class->size_request = gtk_range_size_request;
widget_class->size_allocate = gtk_range_size_allocate;
widget_class->realize = gtk_range_realize;
widget_class->unrealize = gtk_range_unrealize;
widget_class->expose_event = gtk_range_expose;
widget_class->button_press_event = gtk_range_button_press;
widget_class->button_release_event = gtk_range_button_release;
widget_class->motion_notify_event = gtk_range_motion_notify;
widget_class->scroll_event = gtk_range_scroll_event;
widget_class->enter_notify_event = gtk_range_enter_notify;
widget_class->leave_notify_event = gtk_range_leave_notify;
widget_class->style_set = gtk_range_style_set;
class->move_slider = gtk_range_move_slider;
class->slider_detail = "slider";
class->stepper_detail = "stepper";
signals[VALUE_CHANGED] =
g_signal_new ("value_changed",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkRangeClass, value_changed),
NULL, NULL,
gtk_marshal_NONE__NONE,
G_TYPE_NONE, 0);
signals[MOVE_SLIDER] =
g_signal_new ("move_slider",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkRangeClass, move_slider),
NULL, NULL,
gtk_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_SCROLL_TYPE);
g_object_class_install_property (gobject_class,
PROP_UPDATE_POLICY,
g_param_spec_enum ("update_policy",
_("Update policy"),
_("How the range should be updated on the screen"),
GTK_TYPE_UPDATE_TYPE,
GTK_UPDATE_CONTINUOUS,
G_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ADJUSTMENT,
g_param_spec_object ("adjustment",
_("Adjustment"),
_("The GtkAdjustment that contains the current value of this range object"),
GTK_TYPE_ADJUSTMENT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
PROP_INVERTED,
g_param_spec_boolean ("inverted",
_("Inverted"),
_("Invert direction slider moves to increase range value"),
FALSE,
G_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("slider_width",
_("Slider Width"),
_("Width of scrollbar or scale thumb"),
0,
G_MAXINT,
14,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("trough_border",
_("Trough Border"),
_("Spacing between thumb/steppers and outer trough bevel"),
0,
G_MAXINT,
1,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("stepper_size",
_("Stepper Size"),
_("Length of step buttons at ends"),
0,
G_MAXINT,
14,
G_PARAM_READABLE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("stepper_spacing",
_("Stepper Spacing"),
_("Spacing between step buttons and thumb"),
0,
G_MAXINT,
0,
G_PARAM_READABLE));
}
static void
gtk_range_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkRange *range;
range = GTK_RANGE (object);
switch (prop_id)
{
case PROP_UPDATE_POLICY:
gtk_range_set_update_policy (range, g_value_get_enum (value));
break;
case PROP_ADJUSTMENT:
gtk_range_set_adjustment (range, g_value_get_object (value));
break;
case PROP_INVERTED:
gtk_range_set_inverted (range, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_range_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkRange *range;
range = GTK_RANGE (object);
switch (prop_id)
{
case PROP_UPDATE_POLICY:
g_value_set_enum (value, range->update_policy);
break;
case PROP_ADJUSTMENT:
g_value_set_object (value, G_OBJECT (range->adjustment));
break;
case PROP_INVERTED:
g_value_set_boolean (value, range->inverted);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_range_init (GtkRange *range)
{
range->adjustment = NULL;
range->update_policy = GTK_UPDATE_CONTINUOUS;
range->inverted = FALSE;
range->flippable = FALSE;
range->min_slider_size = 1;
range->has_stepper_a = FALSE;
range->has_stepper_b = FALSE;
range->has_stepper_c = FALSE;
range->has_stepper_d = FALSE;
range->need_recalc = TRUE;
range->round_digits = -1;
range->layout = g_new0 (GtkRangeLayout, 1);
range->layout->grab_location = MOUSE_OUTSIDE;
range->layout->grab_button = 0;
range->timer = NULL;
}
/**
* gtk_range_get_adjustment:
* @range: a #GtkRange
*
* Get the #GtkAdjustment which is the "model" object for #GtkRange.
* See gtk_range_set_adjustment() for details.
* The return value does not have a reference added, so should not
* be unreferenced.
*
* Return value: a #GtkAdjustment
**/
GtkAdjustment*
gtk_range_get_adjustment (GtkRange *range)
{
g_return_val_if_fail (range != NULL, NULL);
g_return_val_if_fail (GTK_IS_RANGE (range), NULL);
if (!range->adjustment)
gtk_range_set_adjustment (range, NULL);
return range->adjustment;
}
/**
* gtk_range_set_update_policy:
* @range: a #GtkRange
* @policy: update policy
*
* Sets the update policy for the range. #GTK_UPDATE_CONTINUOUS means that
* anytime the range slider is moved, the range value will change and the
* value_changed signal will be emitted. #GTK_UPDATE_DELAYED means that
* the value will be updated after a brief timeout where no slider motion
* occurs, so updates are spaced by a short time rather than
* continuous. #GTK_UPDATE_DISCONTINUOUS means that the value will only
* be updated when the user releases the button and ends the slider
* drag operation.
*
**/
void
gtk_range_set_update_policy (GtkRange *range,
GtkUpdateType policy)
{
g_return_if_fail (range != NULL);
g_return_if_fail (GTK_IS_RANGE (range));
if (range->update_policy != policy)
{
range->update_policy = policy;
g_object_notify (G_OBJECT (range), "update_policy");
}
}
/**
* gtk_range_get_update_policy:
* @range: a #GtkRange
*
* Gets the update policy of @range. See gtk_range_set_update_policy().
*
* Return value: the current update policy
**/
GtkUpdateType
gtk_range_get_update_policy (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), GTK_UPDATE_CONTINUOUS);
return range->update_policy;
}
/**
* gtk_range_set_adjustment:
* @range: a #GtkRange
* @adjustment: a #GtkAdjustment
*
* Sets the adjustment to be used as the "model" object for this range
* widget. The adjustment indicates the current range value, the
* minimum and maximum range values, the step/page increments used
* for keybindings and scrolling, and the page size. The page size
* is normally 0 for #GtkScale and nonzero for #GtkScrollbar, and
* indicates the size of the visible area of the widget being scrolled.
* The page size affects the size of the scrollbar slider.
*
**/
void
gtk_range_set_adjustment (GtkRange *range,
GtkAdjustment *adjustment)
{
g_return_if_fail (range != NULL);
g_return_if_fail (GTK_IS_RANGE (range));
if (!adjustment)
adjustment = (GtkAdjustment*) 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 (range->adjustment != adjustment)
{
if (range->adjustment)
{
gtk_signal_disconnect_by_func (GTK_OBJECT (range->adjustment),
G_CALLBACK (gtk_range_adjustment_changed),
range);
gtk_signal_disconnect_by_func (GTK_OBJECT (range->adjustment),
G_CALLBACK (gtk_range_adjustment_value_changed),
range);
gtk_object_unref (GTK_OBJECT (range->adjustment));
}
range->adjustment = adjustment;
gtk_object_ref (GTK_OBJECT (adjustment));
gtk_object_sink (GTK_OBJECT (adjustment));
gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
(GtkSignalFunc) gtk_range_adjustment_changed,
range);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) gtk_range_adjustment_value_changed,
range);
gtk_range_adjustment_changed (adjustment, range);
g_object_notify (G_OBJECT (range), "adjustment");
}
}
/**
* gtk_range_set_inverted:
* @range: a #GtkRange
* @setting: %TRUE to invert the range
*
* Ranges normally move from lower to higher values as the
* slider moves from top to bottom or left to right. Inverted
* ranges have higher values at the top or on the right rather than
* on the bottom or left.
*
**/
void
gtk_range_set_inverted (GtkRange *range,
gboolean setting)
{
g_return_if_fail (GTK_IS_RANGE (range));
setting = setting != FALSE;
if (setting != range->inverted)
{
range->inverted = setting;
g_object_notify (G_OBJECT (range), "inverted");
gtk_widget_queue_resize (GTK_WIDGET (range));
}
}
/**
* gtk_range_get_inverted:
* @range: a #GtkRange
*
* Gets the value set by gtk_range_set_inverted().
*
* Return value: %TRUE if the range is inverted
**/
gboolean
gtk_range_get_inverted (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), FALSE);
return range->inverted;
}
/**
* gtk_range_set_increments:
* @range: a #GtkRange
* @step: step size
* @page: page size
*
* Sets the step and page sizes for the range.
* The step size is used when the user clicks the #GtkScrollbar
* arrows or moves #GtkScale via arrow keys. The page size
* is used for example when moving via Page Up or Page Down keys.
*
**/
void
gtk_range_set_increments (GtkRange *range,
gdouble step,
gdouble page)
{
g_return_if_fail (GTK_IS_RANGE (range));
range->adjustment->step_increment = step;
range->adjustment->page_increment = page;
gtk_adjustment_changed (range->adjustment);
}
/**
* gtk_range_set_range:
* @range: a #GtkRange
* @min: minimum range value
* @max: maximum range value
*
* Sets the allowable values in the #GtkRange, and clamps the range
* value to be between min and max.
**/
void
gtk_range_set_range (GtkRange *range,
gdouble min,
gdouble max)
{
gdouble value;
g_return_if_fail (GTK_IS_RANGE (range));
g_return_if_fail (min < max);
range->adjustment->lower = min;
range->adjustment->upper = max;
value = CLAMP (range->adjustment->value,
range->adjustment->lower,
(range->adjustment->upper - range->adjustment->page_size));
gtk_adjustment_changed (range->adjustment);
}
/**
* gtk_range_set_value:
* @range: a #GtkRange
* @value: new value of the range
*
* Sets the current value of the range; if the value is outside the
* minimum or maximum range values, it will be clamped to fit inside
* them. The range emits the "value_changed" signal if the value
* changes.
*
**/
void
gtk_range_set_value (GtkRange *range,
gdouble value)
{
g_return_if_fail (GTK_IS_RANGE (range));
value = CLAMP (value, range->adjustment->lower,
(range->adjustment->upper - range->adjustment->page_size));
gtk_adjustment_set_value (range->adjustment, value);
}
/**
* gtk_range_get_value:
* @range: a #GtkRange
*
* Gets the current value of the range.
*
* Return value: current value of the range.
**/
gdouble
gtk_range_get_value (GtkRange *range)
{
g_return_val_if_fail (GTK_IS_RANGE (range), 0.0);
return range->adjustment->value;
}
static gboolean
should_invert (GtkRange *range)
{
if (range->orientation == GTK_ORIENTATION_HORIZONTAL)
return
(range->inverted && !range->flippable) ||
(range->inverted && range->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) ||
(!range->inverted && range->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL);
else
return range->inverted;
}
static void
gtk_range_finalize (GObject *object)
{
GtkRange *range;
g_return_if_fail (GTK_IS_RANGE (object));
range = GTK_RANGE (object);
g_free (range->layout);
(* G_OBJECT_CLASS (parent_class)->finalize) (object);
}
static void
gtk_range_destroy (GtkObject *object)
{
GtkRange *range;
g_return_if_fail (GTK_IS_RANGE (object));
range = GTK_RANGE (object);
gtk_range_remove_step_timer (range);
gtk_range_remove_update_timer (range);
if (range->adjustment)
{
if (range->adjustment)
gtk_signal_disconnect_by_data (GTK_OBJECT (range->adjustment),
(gpointer) range);
gtk_object_unref (GTK_OBJECT (range->adjustment));
range->adjustment = NULL;
}
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gtk_range_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkRange *range;
gint slider_width, stepper_size, trough_border, stepper_spacing;
GdkRectangle range_rect;
GtkBorder border;
range = GTK_RANGE (widget);
gtk_range_get_props (range,
&slider_width, &stepper_size, &trough_border, &stepper_spacing);
gtk_range_calc_request (range,
slider_width, stepper_size, trough_border, stepper_spacing,
&range_rect, &border, NULL, NULL);
requisition->width = range_rect.width + border.left + border.right;
requisition->height = range_rect.height + border.top + border.bottom;
}
static void
gtk_range_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkRange *range;
range = GTK_RANGE (widget);
range->need_recalc = TRUE;
gtk_range_calc_layout (range, range->adjustment->value);
(* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
}
static void
gtk_range_realize (GtkWidget *widget)
{
GtkRange *range;
GdkWindowAttr attributes;
gint attributes_mask;
range = GTK_RANGE (widget);
gtk_range_calc_layout (range, range->adjustment->value);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
gdk_window_set_user_data (widget->window, range);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, widget->state);
}
static void
gtk_range_unrealize (GtkWidget *widget)
{
GtkRange *range;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_RANGE (widget));
range = GTK_RANGE (widget);
gtk_range_remove_step_timer (range);
gtk_range_remove_update_timer (range);
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
draw_stepper (GtkRange *range,
GdkRectangle *rect,
GtkArrowType arrow_type,
gboolean clicked,
gboolean prelighted,
GdkRectangle *area)
{
GtkStateType state_type;
GtkShadowType shadow_type;
GdkRectangle intersection;
/* More to get the right clip region than for efficiency */
if (!gdk_rectangle_intersect (area, rect, &intersection))
return;
if (!GTK_WIDGET_IS_SENSITIVE (range))
state_type = GTK_STATE_INSENSITIVE;
else if (clicked)
state_type = GTK_STATE_ACTIVE;
else if (prelighted)
state_type = GTK_STATE_PRELIGHT;
else
state_type = GTK_STATE_NORMAL;
if (clicked)
shadow_type = GTK_SHADOW_IN;
else
shadow_type = GTK_SHADOW_OUT;
gtk_paint_arrow (GTK_WIDGET (range)->style,
GTK_WIDGET (range)->window,
state_type, shadow_type,
&intersection, GTK_WIDGET (range),
GTK_RANGE_GET_CLASS (range)->stepper_detail,
arrow_type,
TRUE, rect->x, rect->y, rect->width, rect->height);
}
static gint
gtk_range_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkRange *range;
gboolean sensitive;
GtkStateType state;
GdkRectangle area;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
gtk_range_calc_layout (range, range->adjustment->value);
sensitive = GTK_WIDGET_IS_SENSITIVE (widget);
/* Just to be confusing, we draw the trough for the whole
* range rectangle, not the trough rectangle (the trough
* rectangle is just for hit detection)
*/
/* The gdk_rectangle_intersect is more to get the right
* clip region (limited to range_rect) than for efficiency
*/
if (gdk_rectangle_intersect (&event->area, &range->range_rect,
&area))
{
gtk_paint_box (widget->style,
widget->window,
sensitive ? GTK_STATE_ACTIVE : GTK_STATE_INSENSITIVE,
GTK_SHADOW_IN,
&area, GTK_WIDGET(range), "trough",
range->range_rect.x,
range->range_rect.y,
range->range_rect.width,
range->range_rect.height);
if (sensitive &&
GTK_WIDGET_HAS_FOCUS (range))
gtk_paint_focus (widget->style,
widget->window,
&area, widget, "trough",
range->range_rect.x,
range->range_rect.y,
range->range_rect.width,
range->range_rect.height);
}
if (!sensitive)
state = GTK_STATE_INSENSITIVE;
else if (range->layout->mouse_location == MOUSE_SLIDER)
state = GTK_STATE_PRELIGHT;
else
state = GTK_STATE_NORMAL;
if (gdk_rectangle_intersect (&event->area,
&range->layout->slider,
&area))
{
gtk_paint_slider (widget->style,
widget->window,
state,
GTK_SHADOW_OUT,
&event->area,
widget,
GTK_RANGE_GET_CLASS (range)->slider_detail,
range->layout->slider.x,
range->layout->slider.y,
range->layout->slider.width,
range->layout->slider.height,
range->orientation);
}
if (range->has_stepper_a)
draw_stepper (range, &range->layout->stepper_a,
range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
range->layout->grab_location == MOUSE_STEPPER_A,
range->layout->mouse_location == MOUSE_STEPPER_A,
&event->area);
if (range->has_stepper_b)
draw_stepper (range, &range->layout->stepper_b,
range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
range->layout->grab_location == MOUSE_STEPPER_B,
range->layout->mouse_location == MOUSE_STEPPER_B,
&event->area);
if (range->has_stepper_c)
draw_stepper (range, &range->layout->stepper_c,
range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT,
range->layout->grab_location == MOUSE_STEPPER_C,
range->layout->mouse_location == MOUSE_STEPPER_C,
&event->area);
if (range->has_stepper_d)
draw_stepper (range, &range->layout->stepper_d,
range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT,
range->layout->grab_location == MOUSE_STEPPER_D,
range->layout->mouse_location == MOUSE_STEPPER_D,
&event->area);
return FALSE;
}
static void
range_grab_add (GtkRange *range,
MouseLocation location,
gint button)
{
/* we don't actually gtk_grab, since a button is down */
range->layout->grab_location = location;
range->layout->grab_button = button;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (GTK_WIDGET (range));
}
static void
range_grab_remove (GtkRange *range)
{
range->layout->grab_location = MOUSE_OUTSIDE;
range->layout->grab_button = 0;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (GTK_WIDGET (range));
}
static GtkScrollType
range_get_scroll_for_grab (GtkRange *range)
{
switch (range->layout->grab_location)
{
/* Backward stepper */
case MOUSE_STEPPER_A:
case MOUSE_STEPPER_C:
switch (range->layout->grab_button)
{
case 1:
return GTK_SCROLL_STEP_BACKWARD;
break;
case 2:
return GTK_SCROLL_PAGE_BACKWARD;
break;
case 3:
return GTK_SCROLL_START;
break;
}
break;
/* Forward stepper */
case MOUSE_STEPPER_B:
case MOUSE_STEPPER_D:
switch (range->layout->grab_button)
{
case 1:
return GTK_SCROLL_STEP_FORWARD;
break;
case 2:
return GTK_SCROLL_PAGE_FORWARD;
break;
case 3:
return GTK_SCROLL_END;
break;
}
break;
/* In the trough */
case MOUSE_TROUGH:
{
if (range->trough_click_forward)
{
return range->layout->grab_button == 3
? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_STEP_FORWARD;
}
else
{
return range->layout->grab_button == 3
? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_STEP_BACKWARD;
}
}
break;
case MOUSE_OUTSIDE:
case MOUSE_SLIDER:
case MOUSE_WIDGET:
break;
}
return GTK_SCROLL_NONE;
}
static gdouble
coord_to_value (GtkRange *range,
gint coord)
{
gdouble frac;
gdouble value;
if (range->orientation == GTK_ORIENTATION_VERTICAL)
if (range->layout->trough.height == range->layout->slider.height)
frac = 1.0;
else
frac = ((coord - range->layout->trough.y) /
(gdouble) (range->layout->trough.height - range->layout->slider.height));
else
if (range->layout->trough.width == range->layout->slider.width)
frac = 1.0;
else
frac = ((coord - range->layout->trough.x) /
(gdouble) (range->layout->trough.width - range->layout->slider.width));
if (should_invert (range))
frac = 1.0 - frac;
value = range->adjustment->lower +
frac * (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size);
return value;
}
static gint
gtk_range_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
if (!GTK_WIDGET_HAS_FOCUS (widget))
gtk_widget_grab_focus (widget);
/* ignore presses when we're already doing something else. */
if (range->layout->grab_location != MOUSE_OUTSIDE)
return FALSE;
range->layout->mouse_x = event->x;
range->layout->mouse_y = event->y;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (widget);
if (range->layout->mouse_location == MOUSE_TROUGH &&
(event->button == 1 || event->button == 3))
{
/* button 1 steps by step increment, as with button 1 on a stepper,
* button 3 steps by page increment, as with button 2 on a stepper
*/
GtkScrollType scroll;
gdouble click_value;
click_value = coord_to_value (range,
range->orientation == GTK_ORIENTATION_VERTICAL ?
event->y : event->x);
range->trough_click_forward = click_value > range->adjustment->value;
range_grab_add (range, MOUSE_TROUGH, event->button);
scroll = range_get_scroll_for_grab (range);
gtk_range_add_step_timer (range, scroll);
return TRUE;
}
else if ((range->layout->mouse_location == MOUSE_STEPPER_A ||
range->layout->mouse_location == MOUSE_STEPPER_B ||
range->layout->mouse_location == MOUSE_STEPPER_C ||
range->layout->mouse_location == MOUSE_STEPPER_D) &&
(event->button == 1 || event->button == 2 || event->button == 3))
{
GdkRectangle *stepper_area;
GtkScrollType scroll;
range_grab_add (range, range->layout->mouse_location, event->button);
stepper_area = get_area (range, range->layout->mouse_location);
gtk_widget_queue_draw_area (widget,
stepper_area->x,
stepper_area->y,
stepper_area->width,
stepper_area->height);
scroll = range_get_scroll_for_grab (range);
if (scroll != GTK_SCROLL_NONE)
gtk_range_add_step_timer (range, scroll);
return TRUE;
}
else if ((range->layout->mouse_location == MOUSE_TROUGH &&
event->button == 2) ||
range->layout->mouse_location == MOUSE_SLIDER)
{
gboolean need_value_update = FALSE;
/* Any button can be used to drag the slider, but you can start
* dragging the slider with a trough click using button 2;
* On button 2 press, we warp the slider to mouse position,
* then begin the slider drag.
*/
if (event->button == 2)
{
gdouble slider_low_value, slider_high_value, new_value;
slider_high_value =
coord_to_value (range,
range->orientation == GTK_ORIENTATION_VERTICAL ?
event->y : event->x);
slider_low_value =
coord_to_value (range,
range->orientation == GTK_ORIENTATION_VERTICAL ?
event->y - range->layout->slider.height :
event->x - range->layout->slider.width);
/* compute new value for warped slider */
new_value = slider_low_value + (slider_high_value - slider_low_value) / 2;
/* recalc slider, so we can set slide_initial_slider_position
* properly
*/
range->need_recalc = TRUE;
gtk_range_calc_layout (range, new_value);
/* defer adjustment updates to update_slider_position() in order
* to keep pixel quantisation
*/
need_value_update = TRUE;
}
if (range->orientation == GTK_ORIENTATION_VERTICAL)
{
range->slide_initial_slider_position = range->layout->slider.y;
range->slide_initial_coordinate = event->y;
}
else
{
range->slide_initial_slider_position = range->layout->slider.x;
range->slide_initial_coordinate = event->x;
}
if (need_value_update)
update_slider_position (range, event->x, event->y);
range_grab_add (range, MOUSE_SLIDER, event->button);
return TRUE;
}
return FALSE;
}
/* During a slide, move the slider as required given new mouse position */
static void
update_slider_position (GtkRange *range,
gint mouse_x,
gint mouse_y)
{
gint delta;
gint c;
gdouble new_value;
if (range->orientation == GTK_ORIENTATION_VERTICAL)
delta = mouse_y - range->slide_initial_coordinate;
else
delta = mouse_x - range->slide_initial_coordinate;
c = range->slide_initial_slider_position + delta;
new_value = coord_to_value (range, c);
gtk_range_internal_set_value (range, new_value);
}
static gint
gtk_range_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
range->layout->mouse_x = event->x;
range->layout->mouse_y = event->y;
if (range->layout->grab_button == event->button)
{
GtkScrollType scroll;
MouseLocation grab_location;
grab_location = range->layout->grab_location;
scroll = range_get_scroll_for_grab (range);
range_grab_remove (range);
gtk_range_remove_step_timer (range);
/* We only do the move if we're still on top of the button at
* release
*/
if (grab_location == range->layout->mouse_location &&
scroll != GTK_SCROLL_NONE)
{
gtk_range_scroll (range, scroll);
}
if (grab_location == MOUSE_SLIDER)
update_slider_position (range, event->x, event->y);
/* Flush any pending discontinuous/delayed updates */
gtk_range_update_value (range);
/* Just be lazy about this, if we scrolled it will all redraw anyway,
* so no point optimizing the button deactivate case
*/
gtk_widget_queue_draw (widget);
return TRUE;
}
return FALSE;
}
static gint
gtk_range_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
if (GTK_WIDGET_REALIZED (range))
{
GtkAdjustment *adj = GTK_RANGE (range)->adjustment;
gdouble new_value = adj->value + ((event->direction == GDK_SCROLL_UP ||
event->direction == GDK_SCROLL_LEFT) ?
-adj->page_increment / 2:
adj->page_increment / 2);
gtk_range_internal_set_value (range, new_value);
/* Policy DELAYED makes sense with scroll events,
* but DISCONTINUOUS doesn't, so we update immediately
* for DISCONTINOUS
*/
if (range->update_policy == GTK_UPDATE_DISCONTINUOUS)
gtk_range_update_value (range);
}
return TRUE;
}
static gint
gtk_range_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkRange *range;
gint x, y;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
gdk_window_get_pointer (widget->window, &x, &y, NULL);
range->layout->mouse_x = x;
range->layout->mouse_y = y;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (widget);
if (range->layout->grab_location == MOUSE_SLIDER)
update_slider_position (range, x, y);
/* We handled the event if the mouse was in the range_rect */
return range->layout->mouse_location != MOUSE_OUTSIDE;
}
static gint
gtk_range_enter_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
range->layout->mouse_x = event->x;
range->layout->mouse_y = event->y;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (widget);
return TRUE;
}
static gint
gtk_range_leave_notify (GtkWidget *widget,
GdkEventCrossing *event)
{
GtkRange *range;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
range->layout->mouse_x = -1;
range->layout->mouse_y = -1;
if (gtk_range_update_mouse_location (range))
gtk_widget_queue_draw (widget);
return TRUE;
}
static void
gtk_range_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range;
g_return_if_fail (adjustment != NULL);
g_return_if_fail (data != NULL);
range = GTK_RANGE (data);
range->need_recalc = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (range));
/* Note that we don't round off to range->round_digits here.
* that's because it's really broken to change a value
* in response to a change signal on that value; round_digits
* is therefore defined to be a filter on what the GtkRange
* can input into the adjustment, not a filter that the GtkRange
* will enforce on the adjustment.
*/
}
static void
gtk_range_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkRange *range;
g_return_if_fail (adjustment != NULL);
g_return_if_fail (data != NULL);
range = GTK_RANGE (data);
range->need_recalc = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (range));
/* This is so we don't lag the widget being scrolled. */
if (GTK_WIDGET_REALIZED (range))
gdk_window_process_updates (GTK_WIDGET (range)->window, TRUE);
/* Note that we don't round off to range->round_digits here.
* that's because it's really broken to change a value
* in response to a change signal on that value; round_digits
* is therefore defined to be a filter on what the GtkRange
* can input into the adjustment, not a filter that the GtkRange
* will enforce on the adjustment.
*/
g_signal_emit (G_OBJECT (range), signals[VALUE_CHANGED], 0);
}
static void
gtk_range_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
GtkRange *range;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_RANGE (widget));
range = GTK_RANGE (widget);
range->need_recalc = TRUE;
(* GTK_WIDGET_CLASS (parent_class)->style_set) (widget, previous_style);
}
static void
step_back (GtkRange *range)
{
gdouble newval;
newval = range->adjustment->value - range->adjustment->step_increment;
gtk_range_internal_set_value (range, newval);
}
static void
step_forward (GtkRange *range)
{
gdouble newval;
newval = range->adjustment->value + range->adjustment->step_increment;
gtk_range_internal_set_value (range, newval);
}
static void
page_back (GtkRange *range)
{
gdouble newval;
newval = range->adjustment->value - range->adjustment->page_increment;
gtk_range_internal_set_value (range, newval);
}
static void
page_forward (GtkRange *range)
{
gdouble newval;
newval = range->adjustment->value + range->adjustment->page_increment;
gtk_range_internal_set_value (range, newval);
}
static void
gtk_range_scroll (GtkRange *range,
GtkScrollType scroll)
{
switch (scroll)
{
case GTK_SCROLL_STEP_LEFT:
if (should_invert (range))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_UP:
if (should_invert (range))
step_forward (range);
else
step_back (range);
break;
case GTK_SCROLL_STEP_RIGHT:
if (should_invert (range))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_DOWN:
if (should_invert (range))
step_back (range);
else
step_forward (range);
break;
case GTK_SCROLL_STEP_BACKWARD:
step_back (range);
break;
case GTK_SCROLL_STEP_FORWARD:
step_forward (range);
break;
case GTK_SCROLL_PAGE_LEFT:
if (should_invert (range))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_UP:
if (should_invert (range))
page_forward (range);
else
page_back (range);
break;
case GTK_SCROLL_PAGE_RIGHT:
if (should_invert (range))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_DOWN:
if (should_invert (range))
page_back (range);
else
page_forward (range);
break;
case GTK_SCROLL_PAGE_BACKWARD:
page_back (range);
break;
case GTK_SCROLL_PAGE_FORWARD:
page_forward (range);
break;
case GTK_SCROLL_START:
gtk_range_internal_set_value (range,
range->adjustment->lower);
break;
case GTK_SCROLL_END:
gtk_range_internal_set_value (range,
range->adjustment->upper - range->adjustment->page_size);
break;
case GTK_SCROLL_JUMP:
/* Used by CList, range doesn't use it. */
break;
case GTK_SCROLL_NONE:
break;
}
}
static void
gtk_range_move_slider (GtkRange *range,
GtkScrollType scroll)
{
gtk_range_scroll (range, scroll);
/* Policy DELAYED makes sense with key events,
* but DISCONTINUOUS doesn't, so we update immediately
* for DISCONTINOUS
*/
if (range->update_policy == GTK_UPDATE_DISCONTINUOUS)
gtk_range_update_value (range);
}
static void
gtk_range_get_props (GtkRange *range,
gint *slider_width,
gint *stepper_size,
gint *trough_border,
gint *stepper_spacing)
{
GtkWidget *widget = GTK_WIDGET (range);
gint tmp_slider_width, tmp_stepper_size, tmp_trough_border, tmp_stepper_spacing;
gtk_widget_style_get (widget,
"slider_width", &tmp_slider_width,
"trough_border", &tmp_trough_border,
"stepper_size", &tmp_stepper_size,
"stepper_spacing", &tmp_stepper_spacing,
NULL);
if (slider_width)
*slider_width = tmp_slider_width;
if (trough_border)
*trough_border = tmp_trough_border;
if (stepper_size)
*stepper_size = tmp_stepper_size;
if (stepper_spacing)
*stepper_spacing = tmp_stepper_spacing;
}
#define POINT_IN_RECT(xcoord, ycoord, rect) \
((xcoord) >= (rect).x && \
(xcoord) < ((rect).x + (rect).width) && \
(ycoord) >= (rect).y && \
(ycoord) < ((rect).y + (rect).height))
/* Update mouse location, return TRUE if it changes */
static gboolean
gtk_range_update_mouse_location (GtkRange *range)
{
gint x, y;
MouseLocation old;
GtkWidget *widget;
widget = GTK_WIDGET (range);
old = range->layout->mouse_location;
x = range->layout->mouse_x;
y = range->layout->mouse_y;
if (range->layout->grab_location != MOUSE_OUTSIDE)
range->layout->mouse_location = range->layout->grab_location;
else if (POINT_IN_RECT (x, y, range->layout->stepper_a))
range->layout->mouse_location = MOUSE_STEPPER_A;
else if (POINT_IN_RECT (x, y, range->layout->stepper_b))
range->layout->mouse_location = MOUSE_STEPPER_B;
else if (POINT_IN_RECT (x, y, range->layout->stepper_c))
range->layout->mouse_location = MOUSE_STEPPER_C;
else if (POINT_IN_RECT (x, y, range->layout->stepper_d))
range->layout->mouse_location = MOUSE_STEPPER_D;
else if (POINT_IN_RECT (x, y, range->layout->slider))
range->layout->mouse_location = MOUSE_SLIDER;
else if (POINT_IN_RECT (x, y, range->layout->trough))
range->layout->mouse_location = MOUSE_TROUGH;
else if (POINT_IN_RECT (x, y, widget->allocation))
range->layout->mouse_location = MOUSE_WIDGET;
else
range->layout->mouse_location = MOUSE_OUTSIDE;
return old != range->layout->mouse_location;
}
/* Clamp rect, border inside widget->allocation, such that we prefer
* to take space from border not rect in all directions, and prefer to
* give space to border over rect in one direction.
*/
static void
clamp_dimensions (GtkWidget *widget,
GdkRectangle *rect,
GtkBorder *border,
gboolean border_expands_horizontally)
{
gint extra, shortage;
g_return_if_fail (rect->x == 0);
g_return_if_fail (rect->y == 0);
g_return_if_fail (rect->width >= 0);
g_return_if_fail (rect->height >= 0);
/* Width */
extra = widget->allocation.width - border->left - border->right - rect->width;
if (extra > 0)
{
if (border_expands_horizontally)
{
border->left += extra / 2;
border->right += extra / 2 + extra % 2;
}
else
{
rect->width += extra;
}
}
/* See if we can fit rect, if not kill the border */
shortage = rect->width - widget->allocation.width;
if (shortage > 0)
{
rect->width = widget->allocation.width;
/* lose the border */
border->left = 0;
border->right = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = rect->width + border->left + border->right -
widget->allocation.width;
if (shortage > 0)
{
/* Shrink borders */
border->left -= shortage / 2;
border->right -= shortage / 2 + shortage % 2;
}
}
/* Height */
extra = widget->allocation.height - border->top - border->bottom - rect->height;
if (extra > 0)
{
if (border_expands_horizontally)
{
/* don't expand border vertically */
rect->height += extra;
}
else
{
border->top += extra / 2;
border->bottom += extra / 2 + extra % 2;
}
}
/* See if we can fit rect, if not kill the border */
shortage = rect->height - widget->allocation.height;
if (shortage > 0)
{
rect->height = widget->allocation.height;
/* lose the border */
border->top = 0;
border->bottom = 0;
}
else
{
/* See if we can fit rect with borders */
shortage = rect->height + border->top + border->bottom -
widget->allocation.height;
if (shortage > 0)
{
/* Shrink borders */
border->top -= shortage / 2;
border->bottom -= shortage / 2 + shortage % 2;
}
}
}
static void
gtk_range_calc_request (GtkRange *range,
gint slider_width,
gint stepper_size,
gint trough_border,
gint stepper_spacing,
GdkRectangle *range_rect,
GtkBorder *border,
gint *n_steppers_p,
gint *slider_length_p)
{
gint slider_length;
gint n_steppers;
border->left = 0;
border->right = 0;
border->top = 0;
border->bottom = 0;
if (GTK_RANGE_GET_CLASS (range)->get_range_border)
(* GTK_RANGE_GET_CLASS (range)->get_range_border) (range, border);
n_steppers = 0;
if (range->has_stepper_a)
n_steppers += 1;
if (range->has_stepper_b)
n_steppers += 1;
if (range->has_stepper_c)
n_steppers += 1;
if (range->has_stepper_d)
n_steppers += 1;
slider_length = range->min_slider_size;
range_rect->x = 0;
range_rect->y = 0;
/* We never expand to fill available space in the small dimension
* (i.e. vertical scrollbars are always a fixed width)
*/
if (range->orientation == GTK_ORIENTATION_VERTICAL)
{
range_rect->width = trough_border * 2 + slider_width;
range_rect->height = stepper_size * n_steppers + stepper_spacing * 2 + trough_border * 2 + slider_length;
}
else
{
range_rect->width = stepper_size * n_steppers + stepper_spacing * 2 + trough_border * 2 + slider_length;
range_rect->height = trough_border * 2 + slider_width;
}
if (n_steppers_p)
*n_steppers_p = n_steppers;
if (slider_length_p)
*slider_length_p = slider_length;
}
static void
gtk_range_calc_layout (GtkRange *range,
gdouble adjustment_value)
{
gint slider_width, stepper_size, trough_border, stepper_spacing;
gint slider_length;
GtkBorder border;
gint n_steppers;
GdkRectangle range_rect;
GtkRangeLayout *layout;
GtkWidget *widget;
if (!range->need_recalc)
return;
/* If we have a too-small allocation, we prefer the steppers over
* the trough/slider, probably the steppers are a more useful
* feature in small spaces.
*
* Also, we prefer to draw the range itself rather than the border
* areas if there's a conflict, since the borders will be decoration
* not controls. Though this depends on subclasses cooperating by
* not drawing on range->range_rect.
*/
widget = GTK_WIDGET (range);
layout = range->layout;
gtk_range_get_props (range,
&slider_width, &stepper_size, &trough_border, &stepper_spacing);
gtk_range_calc_request (range,
slider_width, stepper_size, trough_border, stepper_spacing,
&range_rect, &border, &n_steppers, &slider_length);
/* We never expand to fill available space in the small dimension
* (i.e. vertical scrollbars are always a fixed width)
*/
if (range->orientation == GTK_ORIENTATION_VERTICAL)
{
clamp_dimensions (widget, &range_rect, &border, TRUE);
}
else
{
clamp_dimensions (widget, &range_rect, &border, FALSE);
}
range_rect.x = border.left;
range_rect.y = border.top;
range->range_rect = range_rect;
if (range->orientation == GTK_ORIENTATION_VERTICAL)
{
gint stepper_width, stepper_height;
/* Steppers are the width of the range, and stepper_size in
* height, or if we don't have enough height, divided equally
* among available space.
*/
stepper_width = range_rect.width - trough_border * 2;
if (stepper_width < 1)
stepper_width = range_rect.width; /* screw the trough border */
if (n_steppers == 0)
stepper_height = 0; /* avoid divide by n_steppers */
else
stepper_height = MIN (stepper_size, (range_rect.height / n_steppers));
/* Stepper A */
layout->stepper_a.x = range_rect.x + trough_border;
layout->stepper_a.y = range_rect.y + trough_border;
if (range->has_stepper_a)
{
layout->stepper_a.width = stepper_width;
layout->stepper_a.height = stepper_height;
}
else
{
layout->stepper_a.width = 0;
layout->stepper_a.height = 0;
}
/* Stepper B */
layout->stepper_b.x = layout->stepper_a.x;
layout->stepper_b.y = layout->stepper_a.y + layout->stepper_a.height;
if (range->has_stepper_b)
{
layout->stepper_b.width = stepper_width;
layout->stepper_b.height = stepper_height;
}
else
{
layout->stepper_b.width = 0;
layout->stepper_b.height = 0;
}
/* Stepper D */
if (range->has_stepper_d)
{
layout->stepper_d.width = stepper_width;
layout->stepper_d.height = stepper_height;
}
else
{
layout->stepper_d.width = 0;
layout->stepper_d.height = 0;
}
layout->stepper_d.x = layout->stepper_a.x;
layout->stepper_d.y = range_rect.y + range_rect.height - layout->stepper_d.height - trough_border;
/* Stepper C */
if (range->has_stepper_c)
{
layout->stepper_c.width = stepper_width;
layout->stepper_c.height = stepper_height;
}
else
{
layout->stepper_c.width = 0;
layout->stepper_c.height = 0;
}
layout->stepper_c.x = layout->stepper_a.x;
layout->stepper_c.y = layout->stepper_d.y - layout->stepper_c.height;
/* Now the trough is the remaining space between steppers B and C,
* if any
*/
layout->trough.x = range_rect.x;
layout->trough.y = layout->stepper_b.y + layout->stepper_b.height;
layout->trough.width = range_rect.width;
layout->trough.height = layout->stepper_c.y - (layout->stepper_b.y + layout->stepper_b.height);
/* Slider fits into the trough, with stepper_spacing on either side,
* and the size/position based on the adjustment or fixed, depending.
*/
layout->slider.x = layout->trough.x + trough_border;
layout->slider.width = layout->trough.width - trough_border * 2;
/* Compute slider position/length */
{
gint y, bottom, top, height;
top = layout->trough.y + stepper_spacing;
bottom = layout->trough.y + layout->trough.height - stepper_spacing;
/* slider height is the fraction (page_size /
* total_adjustment_range) times the trough height in pixels
*/
height = ((bottom - top) * (range->adjustment->page_size /
(range->adjustment->upper - range->adjustment->lower)));
if (height < range->min_slider_size ||
range->slider_size_fixed)
height = range->min_slider_size;
height = MIN (height, (layout->trough.height - stepper_spacing * 2));
y = top;
y += (bottom - top - height) * ((adjustment_value - range->adjustment->lower) /
(range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size));
y = CLAMP (y, top, bottom);
if (should_invert (range))
y = bottom - (y - top + height);
layout->slider.y = y;
layout->slider.height = height;
/* These are publically exported */
range->slider_start = layout->slider.y;
range->slider_end = layout->slider.y + layout->slider.height;
}
}
else
{
gint stepper_width, stepper_height;
/* Steppers are the height of the range, and stepper_size in
* width, or if we don't have enough width, divided equally
* among available space.
*/
stepper_height = range_rect.height - trough_border * 2;
if (stepper_height < 1)
stepper_height = range_rect.height; /* screw the trough border */
if (n_steppers == 0)
stepper_width = 0; /* avoid divide by n_steppers */
else
stepper_width = MIN (stepper_size, (range_rect.width / n_steppers));
/* Stepper A */
layout->stepper_a.x = range_rect.x + trough_border;
layout->stepper_a.y = range_rect.y + trough_border;
if (range->has_stepper_a)
{
layout->stepper_a.width = stepper_width;
layout->stepper_a.height = stepper_height;
}
else
{
layout->stepper_a.width = 0;
layout->stepper_a.height = 0;
}
/* Stepper B */
layout->stepper_b.x = layout->stepper_a.x + layout->stepper_a.width;
layout->stepper_b.y = layout->stepper_a.y;
if (range->has_stepper_b)
{
layout->stepper_b.width = stepper_width;
layout->stepper_b.height = stepper_height;
}
else
{
layout->stepper_b.width = 0;
layout->stepper_b.height = 0;
}
/* Stepper D */
if (range->has_stepper_d)
{
layout->stepper_d.width = stepper_width;
layout->stepper_d.height = stepper_height;
}
else
{
layout->stepper_d.width = 0;
layout->stepper_d.height = 0;
}
layout->stepper_d.x = range_rect.x + range_rect.width - layout->stepper_d.width - trough_border;
layout->stepper_d.y = layout->stepper_a.y;
/* Stepper C */
if (range->has_stepper_c)
{
layout->stepper_c.width = stepper_width;
layout->stepper_c.height = stepper_height;
}
else
{
layout->stepper_c.width = 0;
layout->stepper_c.height = 0;
}
layout->stepper_c.x = layout->stepper_d.x - layout->stepper_c.width;
layout->stepper_c.y = layout->stepper_a.y;
/* Now the trough is the remaining space between steppers B and C,
* if any
*/
layout->trough.x = layout->stepper_b.x + layout->stepper_b.width;
layout->trough.y = range_rect.y;
layout->trough.width = layout->stepper_c.x - (layout->stepper_b.x + layout->stepper_b.width);
layout->trough.height = range_rect.height;
/* Slider fits into the trough, with stepper_spacing on either side,
* and the size/position based on the adjustment or fixed, depending.
*/
layout->slider.y = layout->trough.y + trough_border;
layout->slider.height = layout->trough.height - trough_border * 2;
/* Compute slider position/length */
{
gint x, left, right, width;
left = layout->trough.x + stepper_spacing;
right = layout->trough.x + layout->trough.width - stepper_spacing;
/* slider width is the fraction (page_size /
* total_adjustment_range) times the trough width in pixels
*/
width = ((right - left) * (range->adjustment->page_size /
(range->adjustment->upper - range->adjustment->lower)));
if (width < range->min_slider_size ||
range->slider_size_fixed)
width = range->min_slider_size;
width = MIN (width, (layout->trough.width - stepper_spacing * 2));
x = left;
x += (right - left - width) * ((adjustment_value - range->adjustment->lower) /
(range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size));
x = CLAMP (x, left, right);
if (should_invert (range))
x = right - (x - left + width);
layout->slider.x = x;
layout->slider.width = width;
/* These are publically exported */
range->slider_start = layout->slider.x;
range->slider_end = layout->slider.x + layout->slider.width;
}
}
gtk_range_update_mouse_location (range);
}
static GdkRectangle*
get_area (GtkRange *range,
MouseLocation location)
{
switch (location)
{
case MOUSE_STEPPER_A:
return &range->layout->stepper_a;
case MOUSE_STEPPER_B:
return &range->layout->stepper_b;
case MOUSE_STEPPER_C:
return &range->layout->stepper_c;
case MOUSE_STEPPER_D:
return &range->layout->stepper_d;
case MOUSE_TROUGH:
return &range->layout->trough;
case MOUSE_SLIDER:
return &range->layout->slider;
case MOUSE_WIDGET:
case MOUSE_OUTSIDE:
break;
}
g_warning (G_STRLOC": bug");
return NULL;
}
static void
gtk_range_internal_set_value (GtkRange *range,
gdouble value)
{
value = CLAMP (value, range->adjustment->lower,
(range->adjustment->upper - range->adjustment->page_size));
if (range->round_digits >= 0)
{
char buffer[128];
/* This is just so darn lame. */
g_snprintf (buffer, 128, "%0.*f",
range->round_digits, value);
sscanf (buffer, "%lf", &value);
}
if (range->adjustment->value != value)
{
range->need_recalc = TRUE;
gtk_widget_queue_draw (GTK_WIDGET (range));
switch (range->update_policy)
{
case GTK_UPDATE_CONTINUOUS:
gtk_adjustment_set_value (range->adjustment, value);
break;
/* Delayed means we update after a period of inactivity */
case GTK_UPDATE_DELAYED:
gtk_range_reset_update_timer (range);
/* FALL THRU */
/* Discontinuous means we update on button release */
case GTK_UPDATE_DISCONTINUOUS:
/* don't emit value_changed signal */
range->adjustment->value = value;
range->update_pending = TRUE;
break;
}
}
}
static void
gtk_range_update_value (GtkRange *range)
{
gtk_range_remove_update_timer (range);
if (range->update_pending)
{
gtk_adjustment_value_changed (range->adjustment);
range->update_pending = FALSE;
}
}
struct _GtkRangeStepTimer
{
guint timeout_id;
GtkScrollType step;
};
static gboolean
second_timeout (gpointer data)
{
GtkRange *range;
GDK_THREADS_ENTER ();
range = GTK_RANGE (data);
gtk_range_scroll (range, range->timer->step);
GDK_THREADS_LEAVE ();
return TRUE;
}
static gboolean
initial_timeout (gpointer data)
{
GtkRange *range;
GDK_THREADS_ENTER ();
range = GTK_RANGE (data);
range->timer->timeout_id =
g_timeout_add (SCROLL_LATER_DELAY,
second_timeout,
range);
GDK_THREADS_LEAVE ();
/* remove self */
return FALSE;
}
static void
gtk_range_add_step_timer (GtkRange *range,
GtkScrollType step)
{
g_return_if_fail (range->timer == NULL);
g_return_if_fail (step != GTK_SCROLL_NONE);
range->timer = g_new (GtkRangeStepTimer, 1);
range->timer->timeout_id =
g_timeout_add (SCROLL_INITIAL_DELAY,
initial_timeout,
range);
range->timer->step = step;
}
static void
gtk_range_remove_step_timer (GtkRange *range)
{
if (range->timer)
{
if (range->timer->timeout_id != 0)
g_source_remove (range->timer->timeout_id);
g_free (range->timer);
range->timer = NULL;
}
}
static gboolean
update_timeout (gpointer data)
{
GtkRange *range;
GDK_THREADS_ENTER ();
range = GTK_RANGE (data);
gtk_range_update_value (range);
range->update_timeout_id = 0;
GDK_THREADS_LEAVE ();
/* self-remove */
return FALSE;
}
static void
gtk_range_reset_update_timer (GtkRange *range)
{
gtk_range_remove_update_timer (range);
range->update_timeout_id = g_timeout_add (UPDATE_DELAY,
update_timeout,
range);
}
static void
gtk_range_remove_update_timer (GtkRange *range)
{
if (range->update_timeout_id != 0)
{
g_source_remove (range->update_timeout_id);
range->update_timeout_id = 0;
}
}
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