forked from AuroraMiddleware/gtk
364 lines
11 KiB
C
364 lines
11 KiB
C
/* GTK - The GIMP Toolkit
|
|
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* Modified by the GTK+ Team and others 1997-2001. 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/.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gtkarrow
|
|
* @Short_description: Displays an arrow
|
|
* @Title: GtkArrow
|
|
* @See_also: gtk_render_arrow()
|
|
*
|
|
* GtkArrow should be used to draw simple arrows that need to point in
|
|
* one of the four cardinal directions (up, down, left, or right). The
|
|
* style of the arrow can be one of shadow in, shadow out, etched in, or
|
|
* etched out. Note that these directions and style types may be
|
|
* amended in versions of GTK+ to come.
|
|
*
|
|
* GtkArrow will fill any space alloted to it, but since it is inherited
|
|
* from #GtkMisc, it can be padded and/or aligned, to fill exactly the
|
|
* space the programmer desires.
|
|
*
|
|
* Arrows are created with a call to gtk_arrow_new(). The direction or
|
|
* style of an arrow can be changed after creation by using gtk_arrow_set().
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <math.h>
|
|
#include "gtkarrow.h"
|
|
#include "gtksizerequest.h"
|
|
#include "gtktypebuiltins.h"
|
|
#include "gtkprivate.h"
|
|
#include "gtkintl.h"
|
|
|
|
#include "a11y/gtkarrowaccessible.h"
|
|
|
|
#define MIN_ARROW_SIZE 15
|
|
|
|
struct _GtkArrowPrivate
|
|
{
|
|
gint16 arrow_type;
|
|
gint16 shadow_type;
|
|
};
|
|
|
|
enum {
|
|
PROP_0,
|
|
PROP_ARROW_TYPE,
|
|
PROP_SHADOW_TYPE
|
|
};
|
|
|
|
|
|
static void gtk_arrow_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec);
|
|
static void gtk_arrow_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec);
|
|
static gboolean gtk_arrow_draw (GtkWidget *widget,
|
|
cairo_t *cr);
|
|
|
|
static void gtk_arrow_get_preferred_width (GtkWidget *widget,
|
|
gint *minimum_size,
|
|
gint *natural_size);
|
|
static void gtk_arrow_get_preferred_height (GtkWidget *widget,
|
|
gint *minimum_size,
|
|
gint *natural_size);
|
|
|
|
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
|
G_DEFINE_TYPE_WITH_PRIVATE (GtkArrow, gtk_arrow, GTK_TYPE_MISC)
|
|
G_GNUC_END_IGNORE_DEPRECATIONS
|
|
|
|
static void
|
|
gtk_arrow_class_init (GtkArrowClass *class)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GtkWidgetClass *widget_class;
|
|
|
|
gobject_class = (GObjectClass*) class;
|
|
widget_class = (GtkWidgetClass*) class;
|
|
|
|
gobject_class->set_property = gtk_arrow_set_property;
|
|
gobject_class->get_property = gtk_arrow_get_property;
|
|
|
|
widget_class->draw = gtk_arrow_draw;
|
|
widget_class->get_preferred_width = gtk_arrow_get_preferred_width;
|
|
widget_class->get_preferred_height = gtk_arrow_get_preferred_height;
|
|
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_ARROW_TYPE,
|
|
g_param_spec_enum ("arrow-type",
|
|
P_("Arrow direction"),
|
|
P_("The direction the arrow should point"),
|
|
GTK_TYPE_ARROW_TYPE,
|
|
GTK_ARROW_RIGHT,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
g_object_class_install_property (gobject_class,
|
|
PROP_SHADOW_TYPE,
|
|
g_param_spec_enum ("shadow-type",
|
|
P_("Arrow shadow"),
|
|
P_("Appearance of the shadow surrounding the arrow"),
|
|
GTK_TYPE_SHADOW_TYPE,
|
|
GTK_SHADOW_OUT,
|
|
GTK_PARAM_READWRITE));
|
|
|
|
gtk_widget_class_install_style_property (widget_class,
|
|
g_param_spec_float ("arrow-scaling",
|
|
P_("Arrow Scaling"),
|
|
P_("Amount of space used up by arrow"),
|
|
0.0, 1.0, 0.7,
|
|
GTK_PARAM_READABLE));
|
|
|
|
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_ARROW_ACCESSIBLE);
|
|
}
|
|
|
|
static void
|
|
gtk_arrow_set_property (GObject *object,
|
|
guint prop_id,
|
|
const GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkArrow *arrow = GTK_ARROW (object);
|
|
GtkArrowPrivate *priv = arrow->priv;
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_ARROW_TYPE:
|
|
gtk_arrow_set (arrow,
|
|
g_value_get_enum (value),
|
|
priv->shadow_type);
|
|
break;
|
|
case PROP_SHADOW_TYPE:
|
|
gtk_arrow_set (arrow,
|
|
priv->arrow_type,
|
|
g_value_get_enum (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_arrow_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkArrow *arrow = GTK_ARROW (object);
|
|
GtkArrowPrivate *priv = arrow->priv;
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_ARROW_TYPE:
|
|
g_value_set_enum (value, priv->arrow_type);
|
|
break;
|
|
case PROP_SHADOW_TYPE:
|
|
g_value_set_enum (value, priv->shadow_type);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_arrow_init (GtkArrow *arrow)
|
|
{
|
|
arrow->priv = gtk_arrow_get_instance_private (arrow);
|
|
|
|
gtk_widget_set_has_window (GTK_WIDGET (arrow), FALSE);
|
|
|
|
arrow->priv->arrow_type = GTK_ARROW_RIGHT;
|
|
arrow->priv->shadow_type = GTK_SHADOW_OUT;
|
|
}
|
|
|
|
static void
|
|
gtk_arrow_get_preferred_width (GtkWidget *widget,
|
|
gint *minimum_size,
|
|
gint *natural_size)
|
|
{
|
|
GtkBorder border;
|
|
|
|
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
|
_gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
|
|
G_GNUC_END_IGNORE_DEPRECATIONS
|
|
|
|
*minimum_size = MIN_ARROW_SIZE + border.left + border.right;
|
|
*natural_size = MIN_ARROW_SIZE + border.left + border.right;
|
|
}
|
|
|
|
static void
|
|
gtk_arrow_get_preferred_height (GtkWidget *widget,
|
|
gint *minimum_size,
|
|
gint *natural_size)
|
|
{
|
|
GtkBorder border;
|
|
|
|
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
|
_gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
|
|
G_GNUC_END_IGNORE_DEPRECATIONS
|
|
|
|
*minimum_size = MIN_ARROW_SIZE + border.top + border.bottom;
|
|
*natural_size = MIN_ARROW_SIZE + border.top + border.bottom;
|
|
}
|
|
|
|
/**
|
|
* gtk_arrow_new:
|
|
* @arrow_type: a valid #GtkArrowType.
|
|
* @shadow_type: a valid #GtkShadowType.
|
|
*
|
|
* Creates a new #GtkArrow widget.
|
|
*
|
|
* Returns: the new #GtkArrow widget.
|
|
*/
|
|
GtkWidget*
|
|
gtk_arrow_new (GtkArrowType arrow_type,
|
|
GtkShadowType shadow_type)
|
|
{
|
|
GtkArrowPrivate *priv;
|
|
GtkArrow *arrow;
|
|
|
|
arrow = g_object_new (GTK_TYPE_ARROW, NULL);
|
|
|
|
priv = arrow->priv;
|
|
|
|
priv->arrow_type = arrow_type;
|
|
priv->shadow_type = shadow_type;
|
|
|
|
return GTK_WIDGET (arrow);
|
|
}
|
|
|
|
/**
|
|
* gtk_arrow_set:
|
|
* @arrow: a widget of type #GtkArrow.
|
|
* @arrow_type: a valid #GtkArrowType.
|
|
* @shadow_type: a valid #GtkShadowType.
|
|
*
|
|
* Sets the direction and style of the #GtkArrow, @arrow.
|
|
*/
|
|
void
|
|
gtk_arrow_set (GtkArrow *arrow,
|
|
GtkArrowType arrow_type,
|
|
GtkShadowType shadow_type)
|
|
{
|
|
GtkArrowPrivate *priv;
|
|
GtkWidget *widget;
|
|
|
|
g_return_if_fail (GTK_IS_ARROW (arrow));
|
|
|
|
priv = arrow->priv;
|
|
|
|
if (priv->arrow_type != arrow_type
|
|
|| priv->shadow_type != shadow_type)
|
|
{
|
|
g_object_freeze_notify (G_OBJECT (arrow));
|
|
|
|
if ((GtkArrowType) priv->arrow_type != arrow_type)
|
|
{
|
|
priv->arrow_type = arrow_type;
|
|
g_object_notify (G_OBJECT (arrow), "arrow-type");
|
|
}
|
|
|
|
if (priv->shadow_type != shadow_type)
|
|
{
|
|
priv->shadow_type = shadow_type;
|
|
g_object_notify (G_OBJECT (arrow), "shadow-type");
|
|
}
|
|
|
|
g_object_thaw_notify (G_OBJECT (arrow));
|
|
|
|
widget = GTK_WIDGET (arrow);
|
|
if (gtk_widget_is_drawable (widget))
|
|
gtk_widget_queue_draw (widget);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gtk_arrow_draw (GtkWidget *widget,
|
|
cairo_t *cr)
|
|
{
|
|
GtkArrow *arrow = GTK_ARROW (widget);
|
|
GtkArrowPrivate *priv = arrow->priv;
|
|
GtkStyleContext *context;
|
|
gdouble x, y;
|
|
gint width, height;
|
|
gint extent;
|
|
GtkBorder border;
|
|
gfloat xalign, yalign;
|
|
GtkArrowType effective_arrow_type;
|
|
gfloat arrow_scaling;
|
|
gdouble angle;
|
|
|
|
if (priv->arrow_type == GTK_ARROW_NONE)
|
|
return FALSE;
|
|
|
|
context = gtk_widget_get_style_context (widget);
|
|
gtk_widget_style_get (widget, "arrow-scaling", &arrow_scaling, NULL);
|
|
|
|
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
|
_gtk_misc_get_padding_and_border (GTK_MISC (widget), &border);
|
|
gtk_misc_get_alignment (GTK_MISC (widget), &xalign, &yalign);
|
|
G_GNUC_END_IGNORE_DEPRECATIONS
|
|
|
|
width = gtk_widget_get_allocated_width (widget) - border.left - border.right;
|
|
height = gtk_widget_get_allocated_height (widget) - border.top - border.bottom;
|
|
|
|
extent = MIN (width, height) * arrow_scaling;
|
|
effective_arrow_type = priv->arrow_type;
|
|
|
|
if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
|
|
{
|
|
xalign = 1.0 - xalign;
|
|
if (priv->arrow_type == GTK_ARROW_LEFT)
|
|
effective_arrow_type = GTK_ARROW_RIGHT;
|
|
else if (priv->arrow_type == GTK_ARROW_RIGHT)
|
|
effective_arrow_type = GTK_ARROW_LEFT;
|
|
}
|
|
|
|
x = border.left + ((width - extent) * xalign);
|
|
y = border.top + ((height - extent) * yalign);
|
|
|
|
switch (effective_arrow_type)
|
|
{
|
|
case GTK_ARROW_UP:
|
|
angle = 0;
|
|
break;
|
|
case GTK_ARROW_RIGHT:
|
|
angle = G_PI / 2;
|
|
break;
|
|
case GTK_ARROW_DOWN:
|
|
angle = G_PI;
|
|
break;
|
|
case GTK_ARROW_LEFT:
|
|
default:
|
|
angle = (3 * G_PI) / 2;
|
|
break;
|
|
}
|
|
|
|
gtk_render_arrow (context, cr, angle, x, y, extent);
|
|
|
|
return FALSE;
|
|
}
|