Mercurial > projects > doodle
annotate doodle/dia/grid_layer.d @ 38:452915ecd1f4
Basic logging functionality
| author | David Bryant <bagnose@gmail.com> |
|---|---|
| date | Sun, 27 Sep 2009 22:51:03 +0930 |
| parents | 188397ef9a12 |
| children | f2e4e1d29b98 |
| rev | line source |
|---|---|
|
28
1754cb773d41
Part-way through getting to compile with configure/builder.
Graham St Jack <graham.stjack@internode.on.net>
parents:
27
diff
changeset
|
1 module doodle.dia.grid_layer; |
|
16
9e63308b749c
* Fix up public/private includes
David Bryant <daveb@acres.com.au>
parents:
12
diff
changeset
|
2 |
| 24 | 3 public { |
|
28
1754cb773d41
Part-way through getting to compile with configure/builder.
Graham St Jack <graham.stjack@internode.on.net>
parents:
27
diff
changeset
|
4 import doodle.dia.icanvas; |
| 24 | 5 } |
| 6 | |
| 7 private { | |
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28
1754cb773d41
Part-way through getting to compile with configure/builder.
Graham St Jack <graham.stjack@internode.on.net>
parents:
27
diff
changeset
|
8 import doodle.cairo.routines; |
| 24 | 9 import std.math; |
| 35 | 10 import std.stdio; |
| 24 | 11 } |
| 11 | 12 |
| 35 | 13 private { |
| 14 double start(in double value, in double spacing) { | |
| 15 real r = floor(value / spacing); | |
| 16 return r * spacing; | |
| 17 } | |
| 11 | 18 } |
| 19 | |
| 20 class GridLayer : Layer, Grid { | |
| 35 | 21 static const double MIN_SPACING = 5.0; // pixels |
| 22 | |
| 24 | 23 this(in string name) { |
| 24 super(name); | |
| 36 | 25 mZoomValid = false; |
| 24 | 26 } |
| 27 | |
| 35 | 28 // Layer overrides: |
| 29 | |
| 11 | 30 override Rectangle bounds() const { |
| 31 // We don't require any geometry | |
| 32 return Rectangle(); | |
| 33 } | |
| 34 | |
| 26 | 35 override void draw(in Viewport viewport, |
| 24 | 36 in Rectangle pixel_damage, scope Context pixel_cr, |
| 37 in Rectangle model_damage, scope Context model_cr) const { | |
| 35 | 38 assert(mZoomValid); |
| 39 | |
| 36 | 40 double xx = 1.0, yy = 1.0; |
| 41 model_cr.userToDeviceDistance(xx, yy); | |
| 42 | |
| 35 | 43 model_cr.save(); { |
| 36 | 44 model_cr.setSourceRgba(0.0, 0.0, 0.0, 0.3); |
| 45 model_cr.setLineWidth(0.5); | |
| 35 | 46 |
| 47 { | |
| 48 // vertical grid lines | |
| 49 double x = start(model_damage.min_corner.x, mSpacing); | |
| 50 double y0 = model_damage.min_corner.y; | |
| 51 double y1 = model_damage.max_corner.y; | |
| 52 | |
| 53 for (;;) { | |
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38
452915ecd1f4
Basic logging functionality
David Bryant <bagnose@gmail.com>
parents:
36
diff
changeset
|
54 vline(model_cr, x, y0, y1); |
| 36 | 55 |
| 56 // Ensure 1 pixel wide FIXME is this naughty? We are sneaking | |
| 57 // through cairo to mix model and pixel coordinates... | |
| 58 model_cr.save(); { | |
| 59 model_cr.scale(1.0 / xx, 1.0 / yy); | |
| 60 model_cr.stroke(); | |
| 61 } model_cr.restore(); | |
| 35 | 62 |
| 63 if (x > model_damage.max_corner.x) { | |
| 64 break; | |
| 65 } | |
| 66 | |
| 67 x += mSpacing; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 { | |
| 72 // horizontal grid lines | |
| 73 double y = start(model_damage.min_corner.y, mSpacing); | |
| 74 double x0 = model_damage.min_corner.x; | |
| 75 double x1 = model_damage.max_corner.x; | |
| 76 | |
| 77 for (;;) { | |
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38
452915ecd1f4
Basic logging functionality
David Bryant <bagnose@gmail.com>
parents:
36
diff
changeset
|
78 hline(model_cr, y, x0, x1); |
| 36 | 79 |
| 80 model_cr.save(); { | |
| 81 model_cr.scale(1.0 / xx, 1.0 / yy); | |
| 82 model_cr.stroke(); | |
| 83 } model_cr.restore(); | |
| 35 | 84 |
| 85 if (y > model_damage.max_corner.y) { | |
| 86 break; | |
| 87 } | |
| 88 | |
| 89 y += mSpacing; | |
| 90 } | |
| 91 } | |
| 92 } model_cr.restore(); | |
| 11 | 93 } |
| 94 | |
| 35 | 95 // Grid overrides: |
| 96 | |
| 36 | 97 override void zoom_changed(double zoom) { |
| 35 | 98 mZoom = zoom; |
| 99 mZoomValid = true; | |
| 36 | 100 |
| 101 // FIXME compute spacing properly | |
| 102 mSpacing = 10.0 / mZoom; // mm | |
| 35 | 103 } |
| 104 | |
| 36 | 105 // FIXME use inout parameter? |
| 106 override bool snap(in Point a, out Point b) const { | |
| 35 | 107 b = a; |
| 108 return false; | |
| 109 } | |
| 110 | |
| 11 | 111 private { |
| 35 | 112 bool mZoomValid; |
| 113 double mZoom; // pixels per millimetre | |
| 114 | |
| 115 double mSpacing; // model spacing | |
| 11 | 116 } |
| 117 } |