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gtk2/gtk/gtkrange.c
George Lebl c66ca2dfb3 check for 0 value on the denominator in the horizontal case just like we 
Sun Dec 09 15:06:51 2001  George Lebl <jirka@5z.com>

	* gtk/gtkrange.c (gtk_range_calc_layout): check for 0 value on the
	  denominator in the horizontal case just like we do in the vertical
	  case (why I didn't notice that there were two cases the first time
	  around is beyond me:).  Also fix indentation in the vertical case.
2001-12-09 22:32:50 +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 "gtkmarshalers.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 void gtk_range_map (GtkWidget *widget);
static void gtk_range_unmap (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->map = gtk_range_map;
widget_class->unmap = gtk_range_unmap;
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)
{
GTK_WIDGET_SET_FLAGS (range, GTK_NO_WINDOW);
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 (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 (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 (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);
widget->allocation = *allocation;
range->need_recalc = TRUE;
gtk_range_calc_layout (range, range->adjustment->value);
if (GTK_WIDGET_REALIZED (range))
gdk_window_move_resize (range->event_window,
widget->allocation.x,
widget->allocation.y,
widget->allocation.width,
widget->allocation.height);
}
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);
widget->window = gtk_widget_get_parent_window (widget);
gdk_window_ref (widget->window);
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_ONLY;
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;
range->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (range->event_window, range);
widget->style = gtk_style_attach (widget->style, widget->window);
}
static void
gtk_range_unrealize (GtkWidget *widget)
{
GtkRange *range;
g_return_if_fail (GTK_IS_RANGE (widget));
range = GTK_RANGE (widget);
gtk_range_remove_step_timer (range);
gtk_range_remove_update_timer (range);
gdk_window_set_user_data (range->event_window, NULL);
gdk_window_destroy (range->event_window);
range->event_window = NULL;
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_range_map (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
g_return_if_fail (GTK_IS_RANGE (widget));
gdk_window_show (range->event_window);
GTK_WIDGET_CLASS (parent_class)->map (widget);
}
static void
gtk_range_unmap (GtkWidget *widget)
{
GtkRange *range = GTK_RANGE (widget);
g_return_if_fail (GTK_IS_RANGE (widget));
gdk_window_hide (range->event_window);
GTK_WIDGET_CLASS (parent_class)->unmap (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;
GtkWidget *widget = GTK_WIDGET (range);
/* More to get the right clip region than for efficiency */
if (!gdk_rectangle_intersect (area, rect, &intersection))
return;
intersection.x += widget->allocation.x;
intersection.y += widget->allocation.y;
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,
widget->allocation.x + rect->x,
widget->allocation.y + rect->y,
rect->width, rect->height);
}
static gint
gtk_range_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkRange *range;
gboolean sensitive;
GtkStateType state;
GdkRectangle expose_area; /* Relative to widget->allocation */
GdkRectangle area;
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
expose_area = event->area;
expose_area.x -= widget->allocation.x;
expose_area.y -= widget->allocation.y;
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 (&expose_area, &range->range_rect,
&area))
{
area.x += widget->allocation.x;
area.y += widget->allocation.y;
gtk_paint_box (widget->style,
widget->window,
sensitive ? GTK_STATE_ACTIVE : GTK_STATE_INSENSITIVE,
GTK_SHADOW_IN,
&area, GTK_WIDGET(range), "trough",
widget->allocation.x + range->range_rect.x,
widget->allocation.y + 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, GTK_WIDGET_STATE (widget),
&area, widget, "trough",
widget->allocation.x + range->range_rect.x,
widget->allocation.y + 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 (&expose_area,
&range->layout->slider,
&area))
{
area.x += widget->allocation.x;
area.y += widget->allocation.y;
gtk_paint_slider (widget->style,
widget->window,
state,
GTK_SHADOW_OUT,
&area,
widget,
GTK_RANGE_GET_CLASS (range)->slider_detail,
widget->allocation.x + range->layout->slider.x,
widget->allocation.y + 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,
&expose_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,
&expose_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,
&expose_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,
&expose_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_STEP_FORWARD : GTK_SCROLL_PAGE_FORWARD;
}
else
{
return range->layout->grab_button == 3
? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_PAGE_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,
widget->allocation.x + stepper_area->x,
widget->allocation.y + 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 (range->event_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, FALSE);
/* 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 (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;
if (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size != 0)
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;
if (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size != 0)
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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