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Diffstat (limited to 'src/display/sp-ctrlline.cpp')
| -rw-r--r-- | src/display/sp-ctrlline.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/display/sp-ctrlline.cpp b/src/display/sp-ctrlline.cpp new file mode 100644 index 0000000..504e3d0 --- /dev/null +++ b/src/display/sp-ctrlline.cpp @@ -0,0 +1,173 @@ +// 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 : |