1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
/** \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"
/**
* 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 = sp_canvas_item_new(sp_desktop_controls(dt), SP_TYPE_CTRL,
"size", 6.0,
"filled", 0,
"fill_color", 0xff00007f,
"stroked", 1,
"stroke_color", 0x000000ff,
NULL);
SP_CTRL(a->ctrl)->moveto(delta);
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) {
gtk_object_destroy(GTK_OBJECT(anchor->ctrl));
}
g_free(anchor);
return NULL;
}
#define A_SNAP 4.0
/**
* 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);
if ( activate && ( Geom::LInfty( w - dt->d2w(anchor->dp) ) <= A_SNAP ) ) {
if (!anchor->active) {
sp_canvas_item_set((GtkObject *) anchor->ctrl, "filled", TRUE, NULL);
anchor->active = TRUE;
}
return anchor;
}
if (anchor->active) {
sp_canvas_item_set((GtkObject *) anchor->ctrl, "filled", FALSE, 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:encoding=utf-8:textwidth=99 :
|