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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Simple straight line
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 2007 Johan Engelen
* Copyright (C) 1999-2002 Lauris Kaplinski
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
/*
* TODO:
* Draw it by hand - we really do not need aa stuff for it
*
*/
#include "display/sp-ctrlline.h"
#include "display/sp-canvas-util.h"
#include "display/cairo-utils.h"
#include "color.h"
#include "display/sp-canvas.h"
namespace {
void sp_ctrlline_destroy(SPCanvasItem *object);
void sp_ctrlline_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
void sp_ctrlline_render(SPCanvasItem *item, SPCanvasBuf *buf);
} // namespace
G_DEFINE_TYPE(SPCtrlLine, sp_ctrlline, SP_TYPE_CANVAS_ITEM);
static void sp_ctrlline_class_init(SPCtrlLineClass *klass)
{
klass->destroy = sp_ctrlline_destroy;
klass->update = sp_ctrlline_update;
klass->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=nullptr;
ctrlline->is_fill = true;
}
namespace {
void sp_ctrlline_destroy(SPCanvasItem *object)
{
g_return_if_fail(object != nullptr);
g_return_if_fail(SP_IS_CTRLLINE(object));
SPCtrlLine *ctrlline = SP_CTRLLINE(object);
ctrlline->item = nullptr;
if(SP_CANVAS_ITEM_CLASS (sp_ctrlline_parent_class)->destroy) {
SP_CANVAS_ITEM_CLASS (sp_ctrlline_parent_class)->destroy(object);
}
}
void sp_ctrlline_render(SPCanvasItem *item, SPCanvasBuf *buf)
{
SPCtrlLine *cl = SP_CTRLLINE(item);
if (!buf->ct) {
return;
}
if (cl->s == cl->e) {
return;
}
Geom::Point s = cl->s * cl->affine;
Geom::Point e = cl->e * cl->affine;
ink_cairo_set_source_rgba32(buf->ct, 0xffffff7f);
cairo_set_line_width(buf->ct, 2);
cairo_new_path(buf->ct);
cairo_move_to(buf->ct, s[Geom::X] - buf->rect.left(), s[Geom::Y] - buf->rect.top());
cairo_line_to(buf->ct, e[Geom::X] - buf->rect.left(), e[Geom::Y] - buf->rect.top());
cairo_stroke(buf->ct);
ink_cairo_set_source_rgba32(buf->ct, cl->rgba);
cairo_set_line_width(buf->ct, 1);
cairo_new_path(buf->ct);
cairo_move_to(buf->ct, s[Geom::X] - buf->rect.left(), s[Geom::Y] - buf->rect.top());
cairo_line_to(buf->ct, e[Geom::X] - buf->rect.left(), e[Geom::Y] - buf->rect.top());
cairo_stroke(buf->ct);
}
void sp_ctrlline_update(SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)
{
SPCtrlLine *cl = SP_CTRLLINE(item);
item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);
if (SP_CANVAS_ITEM_CLASS(sp_ctrlline_parent_class)->update) {
SP_CANVAS_ITEM_CLASS(sp_ctrlline_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);
item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);
}
}
} // namespace
void SPCtrlLine::setRgba32(guint32 rgba)
{
if (rgba != this->rgba) {
this->rgba = rgba;
canvas->requestRedraw(x1, y1, x2, y2);
}
}
#define EPSILON 1e-6
#define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)
void SPCtrlLine::setCoords(gdouble x0, gdouble y0, gdouble x1, gdouble y1)
{
if (DIFFER(x0, s[Geom::X]) || DIFFER(y0, s[Geom::Y]) || DIFFER(x1, e[Geom::X]) || DIFFER(y1, e[Geom::Y])) {
s[Geom::X] = x0;
s[Geom::Y] = y0;
e[Geom::X] = x1;
e[Geom::Y] = y1;
sp_canvas_item_request_update(this);
}
}
void SPCtrlLine::setCoords(Geom::Point const &start, Geom::Point const &end)
{
setCoords(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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