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#define __INKSCAPE_CTRLPOINT_C__
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* Maximilian Albert <maximilian.albert@gmail.com>
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* Copyright (C) 2008 Maximilian Albert
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* Released under GNU GPL
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#include "display-forward.h"
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#include "sp-canvas-util.h"
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#include "sp-ctrlpoint.h"
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#include "display/inkscape-cairo.h"
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static void sp_ctrlpoint_class_init (SPCtrlPointClass *klass);
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static void sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint);
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static void sp_ctrlpoint_destroy (GtkObject *object);
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static void sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags);
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static void sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf);
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static SPCanvasItemClass *parent_class;
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sp_ctrlpoint_get_type (void)
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static GType type = 0;
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sizeof(SPCtrlPointClass),
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(GClassInitFunc) sp_ctrlpoint_class_init,
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(GInstanceInitFunc) sp_ctrlpoint_init,
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type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlPoint", &info, (GTypeFlags)0);
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sp_ctrlpoint_class_init (SPCtrlPointClass *klass)
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GtkObjectClass *object_class = (GtkObjectClass *) klass;
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SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;
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parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);
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object_class->destroy = sp_ctrlpoint_destroy;
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item_class->update = sp_ctrlpoint_update;
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item_class->render = sp_ctrlpoint_render;
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sp_ctrlpoint_init (SPCtrlPoint *ctrlpoint)
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ctrlpoint->rgba = 0x0000ff7f;
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ctrlpoint->pt[Geom::X] = ctrlpoint->pt[Geom::Y] = 0.0;
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ctrlpoint->radius = 2;
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sp_ctrlpoint_destroy (GtkObject *object)
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g_return_if_fail (object != NULL);
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g_return_if_fail (SP_IS_CTRLPOINT (object));
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SPCtrlPoint *ctrlpoint = SP_CTRLPOINT (object);
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if (GTK_OBJECT_CLASS (parent_class)->destroy)
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(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
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sp_ctrlpoint_render (SPCanvasItem *item, SPCanvasBuf *buf)
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SPCtrlPoint *cp = SP_CTRLPOINT (item);
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sp_canvas_prepare_buffer (buf);
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guint32 rgba = cp->rgba;
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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));
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cairo_set_line_width(buf->ct, 1);
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cairo_new_path(buf->ct);
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Geom::Point pt = cp->pt * cp->affine;
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cairo_arc(buf->ct, pt[Geom::X] - buf->rect.x0, pt[Geom::Y] - buf->rect.y0, cp->radius, 0.0, 2 * M_PI);
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cairo_stroke(buf->ct);
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sp_ctrlpoint_update (SPCanvasItem *item, Geom::Matrix const &affine, unsigned int flags)
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SPCtrlPoint *cp = SP_CTRLPOINT (item);
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sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
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if (parent_class->update)
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(* parent_class->update) (item, affine, flags);
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sp_canvas_item_reset_bounds (item);
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Geom::Point pt = cp->pt * affine;
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item->x1 = pt[Geom::X] - cp->radius;
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item->y1 = pt[Geom::Y] - cp->radius;
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item->x2 = pt[Geom::X] + cp->radius;
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item->y2 = pt[Geom::Y] + cp->radius;
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sp_canvas_request_redraw (item->canvas,
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(int)item->x1 - 15, (int)item->y1 - 15,
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(int)item->x1 + 15, (int)item->y1 + 15);
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sp_ctrlpoint_set_color (SPCtrlPoint *cp, guint32 rgba)
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g_return_if_fail (cp != NULL);
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g_return_if_fail (SP_IS_CTRLPOINT (cp));
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if (rgba != cp->rgba) {
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item = SP_CANVAS_ITEM (cp);
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sp_canvas_request_redraw (item->canvas, (int)item->x1, (int)item->y1, (int)item->x2, (int)item->y2);
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#define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)
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sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const gdouble x, const gdouble y)
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g_return_if_fail (cp != NULL);
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g_return_if_fail (SP_IS_CTRLPOINT (cp));
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if (DIFFER (x, cp->pt[Geom::X]) || DIFFER (y, cp->pt[Geom::Y])) {
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sp_canvas_item_request_update (SP_CANVAS_ITEM (cp));
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sp_ctrlpoint_set_coords (SPCtrlPoint *cp, const Geom::Point pt)
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sp_ctrlpoint_set_coords(cp, pt[Geom::X], pt[Geom::Y]);
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sp_ctrlpoint_set_radius (SPCtrlPoint *cp, const double r)
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c-file-style:"stroustrup"
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c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
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// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :