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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
// SPDX-License-Identifier: GPL-2.0-or-later
/**
* A class to represent a control quadrilateral. Used to highlight selected text.
*/
/*
* Author:
* Tavmjong Bah
*
* Copyright (C) 2020 Tavmjong Bah
*
* Rewrite of SPCtrlQuadr
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "canvas-item-quad.h"
#include "color.h" // SP_RGBA_x_F
#include "ui/widget/canvas.h"
namespace Inkscape {
/**
* Create an null control quad.
*/
CanvasItemQuad::CanvasItemQuad(CanvasItemGroup *group)
: CanvasItem(group)
{
_name = "CanvasItemQuad:Null";
_pickable = false; // For now, nobody gets events from this class!
}
/**
* Create a control quad. Point are in document coordinates.
*/
CanvasItemQuad::CanvasItemQuad(CanvasItemGroup *group,
Geom::Point const &p0, Geom::Point const &p1,
Geom::Point const &p2, Geom::Point const &p3)
: CanvasItem(group)
, _p0(p0)
, _p1(p1)
, _p2(p2)
, _p3(p3)
{
_name = "CanvasItemQuad";
_pickable = false; // For now, nobody gets events from this class!
request_update();
}
/**
* Set a control quad. Points are in document coordinates.
*/
void CanvasItemQuad::set_coords(Geom::Point const &p0, Geom::Point const &p1, Geom::Point const &p2, Geom::Point const &p3)
{
std::cout << "Canvas_ItemQuad::set_cords: " << p0 << ", " << p1 << ", " << p2 << ", " << p3 << std::endl;
_p0 = p0;
_p1 = p1;
_p2 = p2;
_p3 = p3;
request_update();
}
/**
* Returns distance between point in canvas units and nearest point on quad.
*/
double CanvasItemQuad::closest_distance_to(Geom::Point const &p)
{
double d = Geom::infinity();
std::cerr << "CanvasItemQuad::closest_distance_to: Not implemented!" << std::endl;
return d;
}
/**
* Returns true if point p (in canvas units) is within tolerance (canvas units) distance of quad.
*/
bool CanvasItemQuad::contains(Geom::Point const &p, double tolerance)
{
if (tolerance != 0) {
std::cerr << "CanvasItemQuad::contains: Non-zero tolerance not implemented!" << std::endl;
}
Geom::Point p0 = _p0 * _affine;
Geom::Point p1 = _p1 * _affine;
Geom::Point p2 = _p2 * _affine;
Geom::Point p3 = _p3 * _affine;
// From 2geom rotated-rect.cpp
return
Geom::cross(p1 - p0, p - p0) >= 0 &&
Geom::cross(p2 - p1, p - p1) >= 0 &&
Geom::cross(p3 - p2, p - p2) >= 0 &&
Geom::cross(p0 - p3, p - p3) >= 0;
}
/**
* Update and redraw control quad.
*/
void CanvasItemQuad::update(Geom::Affine const &affine)
{
if (_affine == affine && !_need_update) {
// Nothing to do.
return;
}
if (_p0 == _p1 ||
_p1 == _p2 ||
_p2 == _p3 ||
_p3 == _p0) {
return; // Not quad or not initialized.
}
// Queue redraw of old area (erase previous content).
request_redraw(); // This is actually never useful as quads are always deleted
// and recreated when a node is moved! But keep it in case we
// change that. CHECK
// Get new bounds
_affine = affine;
Geom::Rect bounds;
bounds.expandTo(_p0);
bounds.expandTo(_p1);
bounds.expandTo(_p2);
bounds.expandTo(_p3);
bounds *= _affine; // Document to canvas.
bounds.expandBy(2); // Room for anti-aliasing effects.
_bounds = bounds;
// Queue redraw of new area
request_redraw();
_need_update = false;
}
/**
* Render quad to screen via Cairo.
*/
void CanvasItemQuad::render(Inkscape::CanvasItemBuffer *buf)
{
if (!buf) {
std::cerr << "CanvasItemQuad::Render: No buffer!" << std::endl;
return;
}
if (_p0 == _p1 ||
_p1 == _p2 ||
_p2 == _p3 ||
_p3 == _p0) {
return; // Not quad or not initialized.
}
if (!_visible) {
// Hidden
return;
}
// Document to canvas
Geom::Point p0 = _p0 * _affine;
Geom::Point p1 = _p1 * _affine;
Geom::Point p2 = _p2 * _affine;
Geom::Point p3 = _p3 * _affine;
// Canvas to screen
p0 *= Geom::Translate(-buf->rect.min());
p1 *= Geom::Translate(-buf->rect.min());
p2 *= Geom::Translate(-buf->rect.min());
p3 *= Geom::Translate(-buf->rect.min());
buf->cr->save();
buf->cr->begin_new_path();
buf->cr->move_to(p0.x(), p0.y());
buf->cr->line_to(p1.x(), p1.y());
buf->cr->line_to(p2.x(), p2.y());
buf->cr->line_to(p3.x(), p3.y());
buf->cr->close_path();
buf->cr->set_source_rgba(SP_RGBA32_R_F(_fill), SP_RGBA32_G_F(_fill),
SP_RGBA32_B_F(_fill), SP_RGBA32_A_F(_fill));
buf->cr->fill();
// Uncomment to show bounds
// Geom::Rect bounds = _bounds;
// bounds.expandBy(-1);
// bounds -= buf->rect.min();
// buf->cr->set_source_rgba(1.0, 0.0, 0.0, 1.0);
// buf->cr->rectangle(bounds.min().x(), bounds.min().y(), bounds.width(), bounds.height());
// buf->cr->stroke();
buf->cr->restore();
}
} // namespace Inkscape
/*
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 :
|
