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#define __INKSCAPE_CTRLPOINT_C__
/*
* Simple point
*
* Author:
* Maximilian Albert <maximilian.albert@gmail.com>
*
* Copyright (C) 2008 Maximilian Albert
*
* Released under GNU GPL
*/
#include "display-forward.h"
#include "sp-canvas-util.h"
#include "sp-ctrlpoint.h"
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <color.h>
#include "display/inkscape-cairo.h"
static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);
static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);
static void sp_ctrlpoint_destroy (GtkObject *object);
static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
static void sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf);
static SPCanvasItemClass *parent_class;
GType
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)
{
GtkObjectClass *object_class = (GtkObjectClass *) klass;
SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
object_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 (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (SP_IS_CTRLPOINT (object));
SPCtrlPoint *ctrlpoint = SP_CTRLPOINT (object);
ctrlpoint->item=NULL;
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_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.x0, pt[Geom::Y] - buf->rect.y0, cp->radius, 0.0, 2 * M_PI);
cairo_stroke(buf->ct);
}
static void
sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
{
SPCtrlPoint *cp = SP_CTRLPOINT (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);
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;
sp_canvas_request_redraw (item->canvas,
(int)item->x1 - 15, (int)item->y1 - 15,
(int)item->x1 + 15, (int)item->y1 + 15);
}
void
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);
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_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));
}
}
void
sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const Geom::Point pt)
{
sp_ctrlpoint_set_coords(cp, pt[Geom::X], pt[Geom::Y]);
}
void
sp_ctrlpoint_set_radius (SPCtrlPoint *cp, const double r)
{
cp->radius = r;
}
/*
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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