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/** \file
* Anchors implementation.
*/
/*
* Authors:
* Copyright (C) 2000 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
* Copyright (C) 2002 Lauris Kaplinski
* Copyright (C) 2004 Monash University
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include "draw-anchor.h"
#include "desktop.h"
#include "desktop-handles.h"
#include "event-context.h"
#include "lpe-tool-context.h"
#include "display/sodipodi-ctrl.h"
#include "display/curve.h"
#include "ui/control-manager.h"
using Inkscape::ControlManager;
#define FILL_COLOR_NORMAL 0xffffff7f
#define FILL_COLOR_MOUSEOVER 0xff0000ff
/**
* Creates an anchor object and initializes it.
*/
SPDrawAnchor *sp_draw_anchor_new(SPDrawContext *dc, SPCurve *curve, gboolean start, Geom::Point delta)
{
if (SP_IS_LPETOOL_CONTEXT(dc)) {
// suppress all kinds of anchors in LPEToolContext
return NULL;
}
SPDesktop *dt = SP_EVENT_CONTEXT_DESKTOP(dc);
SPDrawAnchor *a = g_new(SPDrawAnchor, 1);
a->dc = dc;
a->curve = curve;
curve->ref();
a->start = start;
a->active = FALSE;
a->dp = delta;
a->ctrl = ControlManager::getManager().createControl(sp_desktop_controls(dt), Inkscape::CTRL_TYPE_ANCHOR);
SP_CTRL(a->ctrl)->moveto(delta);
ControlManager::getManager().track(a->ctrl);
return a;
}
/**
* Destroys the anchor's canvas item and frees the anchor object.
*/
SPDrawAnchor *sp_draw_anchor_destroy(SPDrawAnchor *anchor)
{
if (anchor->curve) {
anchor->curve->unref();
}
if (anchor->ctrl) {
sp_canvas_item_destroy(anchor->ctrl);
}
g_free(anchor);
return NULL;
}
/**
* Test if point is near anchor, if so fill anchor on canvas and return
* pointer to it or NULL.
*/
SPDrawAnchor *sp_draw_anchor_test(SPDrawAnchor *anchor, Geom::Point w, gboolean activate)
{
SPDesktop *dt = SP_EVENT_CONTEXT_DESKTOP(anchor->dc);
SPCtrl *ctrl = SP_CTRL(anchor->ctrl);
if ( activate && ( Geom::LInfty( w - dt->d2w(anchor->dp) ) <= (ctrl->box.width() / 2.0) ) ) {
if (!anchor->active) {
g_object_set(anchor->ctrl, "fill_color", FILL_COLOR_MOUSEOVER, NULL);
anchor->active = TRUE;
}
return anchor;
}
if (anchor->active) {
g_object_set(anchor->ctrl, "fill_color", FILL_COLOR_NORMAL, NULL);
anchor->active = FALSE;
}
return NULL;
}
/*
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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