Mercurial > projects > doodle
annotate doodle/dia/grid_layer.d @ 80:b759414d2b72
Switched from cairo to Drawable abstraction
| author | "David Bryant <bagnose@gmail.com>" |
|---|---|
| date | Sun, 15 Aug 2010 23:43:04 +0930 |
| parents | c03ed75c0f8e |
| children | d92b9f04b1e8 |
| rev | line source |
|---|---|
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1754cb773d41
Part-way through getting to compile with configure/builder.
Graham St Jack <graham.stjack@internode.on.net>
parents:
27
diff
changeset
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1 module doodle.dia.grid_layer; |
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16
9e63308b749c
* Fix up public/private includes
David Bryant <daveb@acres.com.au>
parents:
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diff
changeset
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2 |
| 24 | 3 public { |
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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
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4 import doodle.dia.icanvas; |
| 24 | 5 } |
| 6 | |
| 7 private { | |
| 73 | 8 import doodle.tk.cairo; |
| 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 | |
| 57 | 20 class GridLayer : Layer, IGrid { |
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c63719604adb
Beginnings of creating a rectangle...
"David Bryant <bagnose@gmail.com>"
parents:
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diff
changeset
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21 immutable double MIN_SPACING = 5.0; // pixels |
| 35 | 22 |
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c63719604adb
Beginnings of creating a rectangle...
"David Bryant <bagnose@gmail.com>"
parents:
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diff
changeset
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23 this(in string name = "Grid") { |
| 24 | 24 super(name); |
| 48 | 25 _zoomValid = 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 | |
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80
b759414d2b72
Switched from cairo to Drawable abstraction
"David Bryant <bagnose@gmail.com>"
parents:
74
diff
changeset
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35 override void draw(in Rectangle screenDamage, scope Drawable screenDrawable, |
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b759414d2b72
Switched from cairo to Drawable abstraction
"David Bryant <bagnose@gmail.com>"
parents:
74
diff
changeset
|
36 in Rectangle modelDamage, scope Drawable modelDrawable) const { |
|
b759414d2b72
Switched from cairo to Drawable abstraction
"David Bryant <bagnose@gmail.com>"
parents:
74
diff
changeset
|
37 /+ |
| 48 | 38 assert(_zoomValid); |
| 35 | 39 |
| 36 | 40 double xx = 1.0, yy = 1.0; |
| 48 | 41 modelCr.userToDeviceDistance(xx, yy); |
| 36 | 42 |
| 48 | 43 modelCr.save(); { |
| 44 modelCr.setSourceRgba(0.0, 0.0, 0.0, 0.3); | |
| 45 modelCr.setLineWidth(0.5); | |
| 35 | 46 |
| 47 { | |
| 48 // vertical grid lines | |
| 70 | 49 double x = start(modelDamage.corner0.x, _spacing); |
| 35 | 50 |
| 51 for (;;) { | |
| 70 | 52 vline(modelCr, x, modelDamage.corner0.y, modelDamage.corner1.y); |
| 36 | 53 |
| 54 // Ensure 1 pixel wide FIXME is this naughty? We are sneaking | |
| 55 // through cairo to mix model and pixel coordinates... | |
| 48 | 56 modelCr.save(); { |
| 57 modelCr.scale(1.0 / xx, 1.0 / yy); | |
| 58 modelCr.stroke(); | |
| 59 } modelCr.restore(); | |
| 35 | 60 |
| 70 | 61 if (x > modelDamage.corner1.x) { |
| 35 | 62 break; |
| 63 } | |
| 64 | |
| 48 | 65 x += _spacing; |
| 35 | 66 } |
| 67 } | |
| 68 | |
| 69 { | |
| 70 // horizontal grid lines | |
| 70 | 71 double y = start(modelDamage.corner0.y, _spacing); |
| 35 | 72 |
| 73 for (;;) { | |
| 70 | 74 hline(modelCr, y, modelDamage.corner0.x, modelDamage.corner1.x); |
| 36 | 75 |
| 41 | 76 // FIXME? |
| 48 | 77 modelCr.save(); { |
| 78 modelCr.scale(1.0 / xx, 1.0 / yy); | |
| 79 modelCr.stroke(); | |
| 80 } modelCr.restore(); | |
| 35 | 81 |
| 70 | 82 if (y > modelDamage.corner1.y) { |
| 35 | 83 break; |
| 84 } | |
| 85 | |
| 48 | 86 y += _spacing; |
| 35 | 87 } |
| 88 } | |
| 48 | 89 } modelCr.restore(); |
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80
b759414d2b72
Switched from cairo to Drawable abstraction
"David Bryant <bagnose@gmail.com>"
parents:
74
diff
changeset
|
90 +/ |
| 11 | 91 } |
| 92 | |
| 57 | 93 // IGrid overrides: |
| 35 | 94 |
| 48 | 95 override void zoomChanged(double zoom) { |
| 96 _zoom = zoom; | |
| 97 _zoomValid = true; | |
| 36 | 98 |
| 99 // FIXME compute spacing properly | |
| 48 | 100 _spacing = 20.0 / _zoom; // mm |
| 35 | 101 } |
| 102 | |
| 36 | 103 // FIXME use inout parameter? |
| 104 override bool snap(in Point a, out Point b) const { | |
| 35 | 105 b = a; |
| 106 return false; | |
| 107 } | |
| 108 | |
| 11 | 109 private { |
| 48 | 110 bool _zoomValid; |
| 111 double _zoom; // pixels per millimetre | |
| 35 | 112 |
| 48 | 113 double _spacing; // model spacing |
| 11 | 114 } |
| 115 } |