#define __INKSCAPE_CTRLLINE_C__

#include "display-forward.h"

#include "sp-canvas-util.h"

#include "sp-ctrlline.h"

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <color.h>

#include "display/inkscape-cairo.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, NR::Matrix const &affine, unsigned int flags);

static void sp_ctrlline_render (SPCanvasItem *item, SPCanvasBuf *buf);

static SPCanvasItemClass *parent_class;

sp_ctrlline_get_type (void)

{

static GtkType type = 0;

if (!type) {

GtkTypeInfo info = {

"SPCtrlLine",

sizeof (SPCtrlLine),

sizeof (SPCtrlLineClass),

(GtkClassInitFunc) sp_ctrlline_class_init,

(GtkObjectInitFunc) sp_ctrlline_init,

NULL, NULL, NULL

};

type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);

}

return type;

}

static void

sp_ctrlline_class_init (SPCtrlLineClass *klass)

{

GtkObjectClass *object_class = (GtkObjectClass *) klass;

SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;

parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);

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[NR::X] = ctrlline->s[NR::Y] = ctrlline->e[NR::X] = ctrlline->e[NR::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;

sp_canvas_prepare_buffer (buf);

guint32 rgba = cl->rgba;

cairo_set_source_rgba(buf->ct, SP_RGBA32_B_F(rgba), SP_RGBA32_G_F(rgba), SP_RGBA32_R_F(rgba), SP_RGBA32_A_F(rgba));

cairo_set_line_width(buf->ct, 1);

cairo_new_path(buf->ct);

NR::Point s = cl->s * cl->affine;

NR::Point e = cl->e * cl->affine;

cairo_move_to (buf->ct, s[NR::X] - buf->rect.x0, s[NR::Y] - buf->rect.y0);

cairo_line_to (buf->ct, e[NR::X] - buf->rect.x0, e[NR::Y] - buf->rect.y0);

cairo_stroke(buf->ct);

}

static void

sp_ctrlline_update (SPCanvasItem *item, NR::Matrix 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;

NR::Point s = cl->s * affine;

NR::Point e = cl->e * affine;

item->x1 = round(MIN(s[NR::X], e[NR::X]) - 1);

item->y1 = round(MIN(s[NR::Y], e[NR::Y]) - 1);

item->x2 = round(MAX(s[NR::X], e[NR::X]) + 1);

item->y2 = round(MAX(s[NR::Y], e[NR::Y]) + 1);

sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);

}

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)

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[NR::X]) || DIFFER (y0, cl->s[NR::Y]) || DIFFER (x1, cl->e[NR::X]) || DIFFER (y1, cl->e[NR::Y])) {

cl->s[NR::X] = x0;

cl->s[NR::Y] = y0;

cl->e[NR::X] = x1;

cl->e[NR::Y] = y1;

sp_canvas_item_request_update (SP_CANVAS_ITEM (cl));

}

}

sp_ctrlline_set_coords (SPCtrlLine *cl, const NR::Point start, const NR::Point end)

{

sp_ctrlline_set_coords(cl, start[0], start[1], end[0], end[1]);

}