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#define __INKSCAPE_CTRLLINE_C__
/*
* Simple straight line
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
*
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 1999-2002 Lauris Kaplinski
*
* Released under GNU GPL
*/
/*
* TODO:
* Draw it by hand - we really do not need aa stuff for it
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "display/sp-ctrlline.h"
#include "display/display-forward.h"
#include "display/sp-canvas-util.h"
#include "display/cairo-utils.h"
#include "color.h"
static void sp_ctrlline_class_init (SPCtrlLineClass *klass);
static void sp_ctrlline_init (SPCtrlLine *ctrlline);
static void sp_ctrlline_destroy (GtkObject *object);
static void sp_ctrlline_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
static void sp_ctrlline_render (SPCanvasItem *item, SPCanvasBuf *buf);
static SPCanvasItemClass *parent_class;
GType
sp_ctrlline_get_type (void)
{
static GType type = 0;
if (!type) {
GTypeInfo info = {
sizeof(SPCtrlLineClass),
NULL, NULL,
(GClassInitFunc) sp_ctrlline_class_init,
NULL, NULL,
sizeof(SPCtrlLine),
0,
(GInstanceInitFunc) sp_ctrlline_init,
NULL
};
type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlLine", &info, (GTypeFlags)0);
}
return type;
}
static void
sp_ctrlline_class_init (SPCtrlLineClass *klass)
{
GtkObjectClass *object_class = (GtkObjectClass *) klass;
SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
parent_class = (SPCanvasItemClass*)g_type_class_peek_parent (klass);
object_class->destroy = sp_ctrlline_destroy;
item_class->update = sp_ctrlline_update;
item_class->render = sp_ctrlline_render;
}
static void
sp_ctrlline_init (SPCtrlLine *ctrlline)
{
ctrlline->rgba = 0x0000ff7f;
ctrlline->s[Geom::X] = ctrlline->s[Geom::Y] = ctrlline->e[Geom::X] = ctrlline->e[Geom::Y] = 0.0;
ctrlline->item=NULL;
}
static void
sp_ctrlline_destroy (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (SP_IS_CTRLLINE (object));
SPCtrlLine *ctrlline = SP_CTRLLINE (object);
ctrlline->item=NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
sp_ctrlline_render (SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCtrlLine *cl = SP_CTRLLINE (item);
if (!buf->ct)
return;
if (cl->s == cl->e)
return;
ink_cairo_set_source_rgba32(buf->ct, cl->rgba);
cairo_set_line_width(buf->ct, 1);
cairo_new_path(buf->ct);
Geom::Point s = cl->s * cl->affine;
Geom::Point e = cl->e * cl->affine;
cairo_move_to (buf->ct, s[Geom::X] - buf->rect.x0, s[Geom::Y] - buf->rect.y0);
cairo_line_to (buf->ct, e[Geom::X] - buf->rect.x0, e[Geom::Y] - buf->rect.y0);
cairo_stroke(buf->ct);
}
static void
sp_ctrlline_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)
{
SPCtrlLine *cl = SP_CTRLLINE (item);
sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
if (parent_class->update)
(* parent_class->update) (item, affine, flags);
sp_canvas_item_reset_bounds (item);
cl->affine = affine;
if (cl->s == cl->e) {
item->x1 = item->x2 = item->y1 = item->y2 = 0;
} else {
Geom::Point s = cl->s * affine;
Geom::Point e = cl->e * affine;
item->x1 = round(MIN(s[Geom::X], e[Geom::X]) - 1);
item->y1 = round(MIN(s[Geom::Y], e[Geom::Y]) - 1);
item->x2 = round(MAX(s[Geom::X], e[Geom::X]) + 1);
item->y2 = round(MAX(s[Geom::Y], e[Geom::Y]) + 1);
sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
}
}
void
sp_ctrlline_set_rgba32 (SPCtrlLine *cl, guint32 rgba)
{
g_return_if_fail (cl != NULL);
g_return_if_fail (SP_IS_CTRLLINE (cl));
if (rgba != cl->rgba) {
SPCanvasItem *item;
cl->rgba = rgba;
item = SP_CANVAS_ITEM (cl);
sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
}
}
#define EPSILON 1e-6
#define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)
void
sp_ctrlline_set_coords (SPCtrlLine *cl, gdouble x0, gdouble y0, gdouble x1, gdouble y1)
{
g_return_if_fail (cl != NULL);
g_return_if_fail (SP_IS_CTRLLINE (cl));
if (DIFFER (x0, cl->s[Geom::X]) || DIFFER (y0, cl->s[Geom::Y]) || DIFFER (x1, cl->e[Geom::X]) || DIFFER (y1, cl->e[Geom::Y])) {
cl->s[Geom::X] = x0;
cl->s[Geom::Y] = y0;
cl->e[Geom::X] = x1;
cl->e[Geom::Y] = y1;
sp_canvas_item_request_update (SP_CANVAS_ITEM (cl));
}
}
void
sp_ctrlline_set_coords (SPCtrlLine *cl, const Geom::Point start, const Geom::Point end)
{
sp_ctrlline_set_coords(cl, start[0], start[1], end[0], end[1]);
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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