sky/examples/widgets/sector.dart - Issue 1218593002: Move sky/examples to sky/sdk/lib/example, and code changes to support that change. Fixes T277.

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Issue 1218593002: Move sky/examples to sky/sdk/lib/example, and code changes to support that change. Fixes T277. (Closed) Base URL: git@github.com:domokit/mojo.git@master

Patch Set: Created 5 years, 5 months ago

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1 // Copyright 2015 The Chromium Authors. All rights reserved.

2 // Use of this source code is governed by a BSD-style license that can be

3 // found in the LICENSE file.

4

5 import 'dart:math' as math;

6

7 import 'package:sky/rendering/box.dart';

8 import 'package:sky/rendering/flex.dart';

9 import 'package:sky/rendering/sky_binding.dart';

10 import 'package:sky/theme/colors.dart' as colors;

11 import 'package:sky/theme/edges.dart';

12 import 'package:sky/theme/theme_data.dart';

13 import 'package:sky/theme/typography.dart' as typography;

14 import 'package:sky/widgets/basic.dart';

15 import 'package:sky/widgets/material.dart';

16 import 'package:sky/widgets/raised_button.dart';

17 import 'package:sky/widgets/scaffold.dart';

18 import 'package:sky/widgets/theme.dart';

19 import 'package:sky/widgets/tool_bar.dart';

20 import 'package:sky/widgets/widget.dart';

21

22 import '../rendering/sector_layout.dart';

23

24 RenderBox initCircle() {

25 return new RenderBoxToRenderSectorAdapter(

26 innerRadius: 25.0,

27 child: new RenderSectorRing(padding: 0.0)

28 );

29 }

30

31 class SectorApp extends App {

32

33 RenderBoxToRenderSectorAdapter sectors = initCircle();

34 math.Random rand = new math.Random(1);

35

36 void addSector() {

37 double deltaTheta;

38 var ring = (sectors.child as RenderSectorRing);

39 SectorDimensions currentSize = ring.getIntrinsicDimensions(const SectorConst raints(), ring.deltaRadius);

40 if (currentSize.deltaTheta >= kTwoPi - (math.PI * 0.2 + 0.05))

41 deltaTheta = kTwoPi - currentSize.deltaTheta;

42 else

43 deltaTheta = math.PI * rand.nextDouble() / 5.0 + 0.05;

44 Color color = new Color(((0xFF << 24) + rand.nextInt(0xFFFFFF)) \| 0x808080);

45 ring.add(new RenderSolidColor(color, desiredDeltaTheta: deltaTheta));

46 updateEnabledState();

47 }

48

49 void removeSector() {

50 (sectors.child as RenderSectorRing).remove((sectors.child as RenderSectorRin g).lastChild);

51 updateEnabledState();

52 }

53

54 static RenderBox initSector(Color color) {

55 RenderSectorRing ring = new RenderSectorRing(padding: 1.0);

56 ring.add(new RenderSolidColor(const Color(0xFF909090), desiredDeltaTheta: kT woPi * 0.15));

57 ring.add(new RenderSolidColor(const Color(0xFF909090), desiredDeltaTheta: kT woPi * 0.15));

58 ring.add(new RenderSolidColor(color, desiredDeltaTheta: kTwoPi * 0.2));

59 return new RenderBoxToRenderSectorAdapter(

60 innerRadius: 5.0,

61 child: ring

62 );

63 }

64 RenderBoxToRenderSectorAdapter sectorAddIcon = initSector(const Color(0xFF00DD 00));

65 RenderBoxToRenderSectorAdapter sectorRemoveIcon = initSector(const Color(0xFFD D0000));

66

67 bool enabledAdd = true;

68 bool enabledRemove = false;

69 void updateEnabledState() {

70 setState(() {

71 var ring = (sectors.child as RenderSectorRing);

72 SectorDimensions currentSize = ring.getIntrinsicDimensions(const SectorCon straints(), ring.deltaRadius);

73 enabledAdd = currentSize.deltaTheta < kTwoPi;

74 enabledRemove = ring.firstChild != null;

75 });

76 }

77

78 Widget build() {

79 return new Theme(

80 data: new ThemeData.light(primary: colors.Blue, darkToolbar: true),

81 child: new Scaffold(

82 toolbar: new ToolBar(

83 center: new Text('Sector Layout in a Widget Tree')),

84 body: new Material(

85 edge: MaterialEdge.canvas,

86 child: new Flex([

87 new Container(

88 padding: new EdgeDims.symmetric(horizontal: 8.0, vertical: 25.0) ,

89 child: new Flex([

90 new RaisedButton(

91 enabled: enabledAdd,

92 child: new ShrinkWrapWidth(

93 child: new Flex([

94 new Container(

95 padding: new EdgeDims.all(4.0),

96 margin: new EdgeDims.only(right: 10.0),

97 child: new WidgetToRenderBoxAdapter(sectorAddIcon)

98 ),

99 new Text('ADD SECTOR'),

100 ])

101 ),

102 onPressed: addSector

103 ),

104 new RaisedButton(

105 enabled: enabledRemove,

106 child: new ShrinkWrapWidth(

107 child: new Flex([

108 new Container(

109 padding: new EdgeDims.all(4.0),

110 margin: new EdgeDims.only(right: 10.0),

111 child: new WidgetToRenderBoxAdapter(sectorRemoveIcon )

112 ),

113 new Text('REMOVE SECTOR'),

114 ])

115 ),

116 onPressed: removeSector

117 )

118 ],

119 justifyContent: FlexJustifyContent.spaceAround

120 )

121 ),

122 new Flexible(

123 child: new Container(

124 margin: new EdgeDims.all(8.0),

125 decoration: new BoxDecoration(

126 border: new Border.all(new BorderSide(color: new Color(0xFF0 00000)))

127 ),

128 padding: new EdgeDims.all(8.0),

129 child: new WidgetToRenderBoxAdapter(sectors)

130 )

131 ),

132 ],

133 direction: FlexDirection.vertical,

134 justifyContent: FlexJustifyContent.spaceBetween

135 )

136 )

137 )

138 );

139 }

140 }

141

142 void main() {

143 runApp(new SectorApp());

144 SkyBinding.instance.onFrame = () {

145 // uncomment this for debugging:

146 // SkyBinding.instance.debugDumpRenderTree();

147 };

148 }

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