#include "sp-canvas-util.h"

#include "sp-ctrlpoint.h"

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <color.h>

#include "display/cairo-utils.h"

#include "display/sp-canvas.h"

static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);

static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);

static void sp_ctrlpoint_destroy(SPCanvasItem *object);

static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);

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

static SPCanvasItemClass *parent_class;

sp_ctrlpoint_get_type (void)

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPCtrlPointClass),

NULL, NULL,

(GClassInitFunc) sp_ctrlpoint_class_init,

NULL, NULL,

sizeof(SPCtrlPoint),

0,

(GInstanceInitFunc) sp_ctrlpoint_init,

NULL

};

type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlPoint", &info, (GTypeFlags)0);

}

return type;

}

static void sp_ctrlpoint_class_init(SPCtrlPointClass *klass)

{

SPCanvasItemClass *item_class = SP_CANVAS_ITEM_CLASS(klass);

parent_class = SP_CANVAS_ITEM_CLASS(g_type_class_peek_parent(klass));

item_class->destroy = sp_ctrlpoint_destroy;

item_class->update = sp_ctrlpoint_update;

item_class->render = sp_ctrlpoint_render;

}

static void

sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint)

{

ctrlpoint->rgba = 0x0000ff7f;

ctrlpoint->pt[Geom::X] = ctrlpoint->pt[Geom::Y] = 0.0;

ctrlpoint->item=NULL;

ctrlpoint->radius = 2;

}

static void sp_ctrlpoint_destroy(SPCanvasItem *object)

{

g_return_if_fail (object != NULL);

g_return_if_fail (SP_IS_CTRLPOINT (object));

SPCtrlPoint *ctrlpoint = SP_CTRLPOINT (object);

ctrlpoint->item=NULL;

if (SP_CANVAS_ITEM_CLASS(parent_class)->destroy)

(* SP_CANVAS_ITEM_CLASS(parent_class)->destroy) (object);

}

static void

sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf)

{

SPCtrlPoint *cp = SP_CTRLPOINT (item);

if (!buf->ct)

return;

sp_canvas_prepare_buffer (buf);

guint32 rgba = cp->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);

Geom::Point pt = cp->pt * cp->affine;

cairo_arc(buf->ct, pt[Geom::X] - buf->rect.left(), pt[Geom::Y] - buf->rect.top(), cp->radius, 0.0, 2 * M_PI);

cairo_stroke(buf->ct);

}

static void sp_ctrlpoint_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)

{

SPCtrlPoint *cp = SP_CTRLPOINT(item);

item->canvas->requestRedraw((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);

cp->affine = affine;

Geom::Point pt = cp->pt * affine;

item->x1 = pt[Geom::X] - cp->radius;

item->y1 = pt[Geom::Y] - cp->radius;

item->x2 = pt[Geom::X] + cp->radius;

item->y2 = pt[Geom::Y] + cp->radius;

item->canvas->requestRedraw((int)item->x1 - 15, (int)item->y1 - 15,

(int)item->x1 + 15, (int)item->y1 + 15);

}

sp_ctrlpoint_set_color (SPCtrlPoint *cp, guint32 rgba)

{

g_return_if_fail (cp != NULL);

g_return_if_fail (SP_IS_CTRLPOINT (cp));

if (rgba != cp->rgba) {

SPCanvasItem *item;

cp->rgba = rgba;

item = SP_CANVAS_ITEM (cp);

item->canvas->requestRedraw((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_ctrlpoint_set_coords (SPCtrlPoint *cp, const gdouble x, const gdouble y)

{

g_return_if_fail (cp != NULL);

g_return_if_fail (SP_IS_CTRLPOINT (cp));

if (DIFFER (x, cp->pt[Geom::X]) || DIFFER (y, cp->pt[Geom::Y])) {

cp->pt[Geom::X] = x;

cp->pt[Geom::Y] = y;

sp_canvas_item_request_update (SP_CANVAS_ITEM (cp));

}

}

sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const Geom::Point pt)

{

sp_ctrlpoint_set_coords(cp, pt[Geom::X], pt[Geom::Y]);

}

sp_ctrlpoint_set_radius (SPCtrlPoint *cp, const double r)

{

cp->radius = r;

}