blob: 2965b86dd85f5f8867a5e9ef6db489b97572d34b (
plain)
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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/**
* A class to represent a grid. All the magic happens elsewhere.
*/
/*
* Author:
* Tavmjong Bah
*
* Copyright (C) 2020 Tavmjong Bah
*
* Rewrite of GridCanvasItem.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "canvas-item-grid.h"
#include "canvas-grid.h"
#include "color.h" // SP_RGBA_x_F
#include "ui/widget/canvas.h"
namespace Inkscape {
/**
* Create an null control grid.
*/
CanvasItemGrid::CanvasItemGrid(CanvasItemGroup *group, CanvasGrid *grid)
: CanvasItem(group)
, _grid(grid)
{
_name = "CanvasItemGrid:";
_name += grid->getName(grid->getGridType());
_pickable = false; // For now, nobody gets events from this class!
_bounds = Geom::Rect(-Geom::infinity(), -Geom::infinity(), Geom::infinity(), Geom::infinity());
request_update(); // Update affine
}
/**
* Destructor: must remove ourself from the CanvasGrid's vector of CanvasItemGrids.
*/
CanvasItemGrid::~CanvasItemGrid()
{
if (_grid) {
_grid->removeCanvasItem(this);
}
}
/**
* Returns distance between point in canvas units and nearest point on grid.
*/
double CanvasItemGrid::closest_distance_to(Geom::Point const &p)
{
double d = Geom::infinity();
std::cerr << "CanvasItemGrid::closest_distance_to: Not implemented!" << std::endl;
return d;
}
/**
* Returns true if point p (in canvas units) is within tolerance (canvas units) distance of grid.
*/
bool CanvasItemGrid::contains(Geom::Point const &p, double tolerance)
{
return false; // We're not pickable!
}
/**
* Update and redraw control grid.
*/
void CanvasItemGrid::update(Geom::Affine const &affine)
{
if (_affine == affine && !_need_update) {
// Nothing to do.
return;
}
_affine = affine;
_grid->Update(affine, 0); // TODO: Remove flag (not used).
_need_update = false;
// Queue redraw of grid area
request_redraw();
}
/**
* Render grid to screen via Cairo.
*/
void CanvasItemGrid::render(Inkscape::CanvasItemBuffer *buf)
{
if (!buf) {
std::cerr << "CanvasItemGrid::Render: No buffer!" << std::endl;
return;
}
if (!_visible) {
// Hidden
return;
}
if (!_grid->isVisible()) {
// Hidden: Grid code doesn't set CanvasItem::visible!
return;
}
_grid->Render(buf);
}
} // 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 :
|
