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/* 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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "gtkarrow.h"
#define MIN_ARROW_SIZE 11
static void gtk_arrow_class_init (GtkArrowClass *klass);
static void gtk_arrow_init (GtkArrow *arrow);
static gint gtk_arrow_expose (GtkWidget *widget,
GdkEventExpose *event);
guint
gtk_arrow_get_type ()
{
static guint arrow_type = 0;
if (!arrow_type)
{
GtkTypeInfo arrow_info =
{
"GtkArrow",
sizeof (GtkArrow),
sizeof (GtkArrowClass),
(GtkClassInitFunc) gtk_arrow_class_init,
(GtkObjectInitFunc) gtk_arrow_init,
(GtkArgFunc) NULL,
};
arrow_type = gtk_type_unique (gtk_misc_get_type (), &arrow_info);
}
return arrow_type;
}
static void
gtk_arrow_class_init (GtkArrowClass *class)
{
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass*) class;
widget_class->expose_event = gtk_arrow_expose;
}
static void
gtk_arrow_init (GtkArrow *arrow)
{
GTK_WIDGET_SET_FLAGS (arrow, GTK_NO_WINDOW);
arrow->arrow_type = GTK_ARROW_RIGHT;
arrow->shadow_type = GTK_SHADOW_OUT;
}
GtkWidget*
gtk_arrow_new (GtkArrowType arrow_type,
GtkShadowType shadow_type)
{
GtkArrow *arrow;
arrow = gtk_type_new (gtk_arrow_get_type ());
GTK_WIDGET (arrow)->requisition.width = MIN_ARROW_SIZE + GTK_MISC (arrow)->xpad * 2;
GTK_WIDGET (arrow)->requisition.height = MIN_ARROW_SIZE + GTK_MISC (arrow)->ypad * 2;
arrow->arrow_type = arrow_type;
arrow->shadow_type = shadow_type;
return GTK_WIDGET (arrow);
}
void
gtk_arrow_set (GtkArrow *arrow,
GtkArrowType arrow_type,
GtkShadowType shadow_type)
{
g_return_if_fail (arrow != NULL);
g_return_if_fail (GTK_IS_ARROW (arrow));
if (((GtkArrowType) arrow->arrow_type != arrow_type) ||
((GtkShadowType) arrow->shadow_type != shadow_type))
{
arrow->arrow_type = arrow_type;
arrow->shadow_type = shadow_type;
if (GTK_WIDGET_DRAWABLE (arrow))
{
gdk_window_clear_area (GTK_WIDGET (arrow)->window,
GTK_WIDGET (arrow)->allocation.x + 1,
GTK_WIDGET (arrow)->allocation.y + 1,
GTK_WIDGET (arrow)->allocation.width - 2,
GTK_WIDGET (arrow)->allocation.height - 2);
gtk_widget_queue_draw (GTK_WIDGET (arrow));
}
}
}
static gint
gtk_arrow_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkArrow *arrow;
GtkMisc *misc;
GtkShadowType shadow_type;
gint width, height;
gint x, y;
gint extent;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_ARROW (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (GTK_WIDGET_DRAWABLE (widget))
{
arrow = GTK_ARROW (widget);
misc = GTK_MISC (widget);
width = widget->allocation.width - misc->xpad * 2;
height = widget->allocation.height - misc->ypad * 2;
extent = MIN (width, height);
x = ((widget->allocation.x + misc->xpad) * (1.0 - misc->xalign) +
(widget->allocation.x + widget->allocation.width - extent - misc->ypad) * misc->xalign);
y = ((widget->allocation.y + misc->ypad) * (1.0 - misc->yalign) +
(widget->allocation.y + widget->allocation.height - extent - misc->ypad) * misc->yalign);
shadow_type = arrow->shadow_type;
if (widget->state == GTK_STATE_ACTIVE)
{
if (shadow_type == GTK_SHADOW_IN)
shadow_type = GTK_SHADOW_OUT;
else if (shadow_type == GTK_SHADOW_OUT)
shadow_type = GTK_SHADOW_IN;
else if (shadow_type == GTK_SHADOW_ETCHED_IN)
shadow_type = GTK_SHADOW_ETCHED_OUT;
else if (shadow_type == GTK_SHADOW_ETCHED_OUT)
shadow_type = GTK_SHADOW_ETCHED_IN;
}
gtk_draw_arrow (widget->style, widget->window,
widget->state, shadow_type, arrow->arrow_type, TRUE,
x, y, extent, extent);
}
return FALSE;
}
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