-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdtree.html
More file actions
1188 lines (1006 loc) · 50.9 KB
/
Copy pathdtree.html
File metadata and controls
1188 lines (1006 loc) · 50.9 KB
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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>决策树构建仿真平台</title>
<script src="https://cdn.tailwindcss.com"></script>
<link href="https://cdn.jsdelivr.net/npm/font-awesome@4.7.0/css/font-awesome.min.css" rel="stylesheet">
<!-- Tailwind 配置 -->
<script>
tailwind.config = {
theme: {
extend: {
colors: {
primary: '#4F46E5',
secondary: '#10B981',
neutral: '#64748B',
light: '#F1F5F9',
dark: '#1E293B'
},
fontFamily: {
inter: ['Inter', 'system-ui', 'sans-serif'],
},
}
}
}
</script>
<style type="text/tailwindcss">
@layer utilities {
.node-shadow {
box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}
.node-selected {
box-shadow: 0 0 0 2px #4F46E5, 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}
.connection-path {
stroke: #94A3B8;
stroke-width: 2;
fill: none;
transition: all 0.2s ease;
}
.connection-path-selected {
stroke: #4F46E5;
stroke-width: 3;
}
.connection-handle {
transition: all 0.2s ease;
opacity: 0;
}
.node-group:hover .connection-handle {
opacity: 1;
}
.connection-label {
font-size: 12px;
fill: #64748B;
pointer-events: none;
}
.connection-label-selected {
fill: #4F46E5;
font-weight: 500;
}
}
</style>
</head>
<body class="font-inter bg-gray-50 text-dark min-h-screen flex flex-col">
<!-- 顶部导航 -->
<header class="bg-white shadow-sm sticky top-0 z-50">
<div class="container mx-auto px-4 py-3 flex justify-between items-center">
<div class="flex items-center gap-2">
<i class="fa fa-sitemap text-primary text-2xl"></i>
<h1 class="text-xl font-bold text-primary">决策树构建仿真平台</h1>
</div>
<div class="flex items-center gap-3">
<button id="new-tree" class="flex items-center gap-1 px-3 py-2 rounded-md bg-light text-dark hover:bg-gray-200 transition-colors">
<i class="fa fa-file-o"></i>
<span class="hidden sm:inline">新建</span>
</button>
<button id="save-tree" class="flex items-center gap-1 px-3 py-2 rounded-md bg-light text-dark hover:bg-gray-200 transition-colors">
<i class="fa fa-save"></i>
<span class="hidden sm:inline">保存</span>
</button>
<button id="export-tree" class="flex items-center gap-1 px-3 py-2 rounded-md bg-primary text-white hover:bg-primary/90 transition-colors">
<i class="fa fa-download"></i>
<span class="hidden sm:inline">导出</span>
</button>
</div>
</div>
</header>
<!-- 主内容区 -->
<main class="flex-1 container mx-auto px-4 py-6">
<div class="flex flex-col lg:flex-row gap-6">
<!-- 左侧工具栏 -->
<div class="lg:w-1/5 bg-white rounded-lg shadow-sm p-4 h-fit">
<h2 class="text-lg font-semibold mb-4 flex items-center">
<i class="fa fa-wrench text-primary mr-2"></i>节点工具
</h2>
<!-- 节点类型 -->
<div class="mb-6">
<h3 class="text-sm font-medium text-neutral mb-3">节点类型</h3>
<div class="grid grid-cols-2 gap-3">
<div class="node-template p-3 bg-primary/10 border-2 border-primary rounded-lg text-center cursor-move hover:bg-primary/20 transition-all" data-type="decision">
<i class="fa fa-question-circle text-primary text-xl mb-1"></i>
<p class="text-xs font-medium">决策节点</p>
</div>
<div class="node-template p-3 bg-secondary/10 border-2 border-secondary rounded-lg text-center cursor-move hover:bg-secondary/20 transition-all" data-type="result">
<i class="fa fa-check-circle text-secondary text-xl mb-1"></i>
<p class="text-xs font-medium">结果节点</p>
</div>
</div>
</div>
<!-- 操作按钮 -->
<div class="space-y-3 mb-6">
<button id="add-root" class="w-full flex items-center justify-center gap-2 px-3 py-2 rounded-md bg-primary text-white hover:bg-primary/90 transition-colors">
<i class="fa fa-plus"></i> 添加根节点
</button>
<button id="clear-canvas" class="w-full flex items-center justify-center gap-2 px-3 py-2 rounded-md bg-light text-dark hover:bg-gray-200 transition-colors border border-gray-200">
<i class="fa fa-trash"></i> 清空画布
</button>
</div>
<!-- 节点编辑面板 -->
<div id="node-editor" class="border-t border-gray-200 pt-4 hidden">
<h3 class="text-sm font-medium text-neutral mb-3">节点编辑</h3>
<input type="hidden" id="current-node-id">
<div class="space-y-3">
<div>
<label class="block text-xs text-gray-500 mb-1">节点名称 *</label>
<input type="text" id="node-name" class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-primary/50 focus:border-primary">
</div>
<div>
<label class="block text-xs text-gray-500 mb-1">节点描述</label>
<textarea id="node-description" rows="2" class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-primary/50 focus:border-primary"></textarea>
</div>
<!-- 决策节点选项 -->
<div id="decision-options" class="hidden">
<label class="block text-xs text-gray-500 mb-1">决策选项</label>
<div id="options-container">
<div class="option-item flex items-center gap-2 mb-2">
<input type="text" class="option-text flex-1 px-3 py-1.5 border border-gray-300 rounded-md text-sm" placeholder="选项内容">
<button type="button" class="remove-option p-1.5 text-red-500 hover:bg-red-50 rounded-full transition-colors">
<i class="fa fa-times"></i>
</button>
</div>
</div>
<button type="button" id="add-option" class="w-full py-1.5 text-xs bg-light text-dark rounded-md hover:bg-gray-200 transition-colors mt-1 flex items-center justify-center gap-1">
<i class="fa fa-plus"></i> 添加选项
</button>
</div>
<div class="flex gap-2 pt-2 border-t border-gray-100">
<button id="save-node" class="flex-1 py-2 bg-primary text-white text-sm rounded-md hover:bg-primary/90 transition-colors">
保存
</button>
<button id="delete-node" class="flex-1 py-2 bg-red-500 text-white text-sm rounded-md hover:bg-red-600 transition-colors">
删除
</button>
</div>
</div>
</div>
<!-- 操作指南 -->
<div class="border-t border-gray-200 pt-4 mt-4">
<h3 class="text-sm font-medium text-neutral mb-3">操作指南</h3>
<ul class="text-xs text-gray-500 space-y-2">
<li class="flex items-start gap-2">
<i class="fa fa-arrows-v mt-0.5 text-primary"></i>
<span>从节点上下连接点拖动创建连接</span>
</li>
<li class="flex items-start gap-2">
<i class="fa fa-mouse-pointer mt-0.5 text-primary"></i>
<span>点击连接选中，按删除键删除</span>
</li>
<li class="flex items-start gap-2">
<i class="fa fa-arrows mt-0.5 text-primary"></i>
<span>拖动节点调整位置</span>
</li>
<li class="flex items-start gap-2">
<i class="fa fa-square-o mt-0.5 text-primary"></i>
<span>点击空白处取消选择</span>
</li>
</ul>
</div>
</div>
<!-- 右侧画布区域 -->
<div class="lg:w-4/5 bg-white rounded-lg shadow-sm p-4 flex flex-col">
<div class="flex justify-between items-center mb-4">
<h2 class="text-lg font-semibold flex items-center">
<i class="fa fa-tree text-primary mr-2"></i>决策树画布
</h2>
<div class="flex items-center gap-2">
<button id="zoom-in" class="p-2 bg-light rounded-md hover:bg-gray-200 transition-colors" title="放大">
<i class="fa fa-search-plus"></i>
</button>
<button id="zoom-out" class="p-2 bg-light rounded-md hover:bg-gray-200 transition-colors" title="缩小">
<i class="fa fa-search-minus"></i>
</button>
<button id="zoom-reset" class="p-2 bg-light rounded-md hover:bg-gray-200 transition-colors" title="重置视图">
<i class="fa fa-compress"></i>
</button>
</div>
</div>
<div id="canvas-container" class="flex-1 bg-gray-50 rounded-md border border-gray-200 relative overflow-hidden min-h-[600px]">
<!-- 空状态提示 -->
<div id="empty-state" class="absolute inset-0 flex flex-col items-center justify-center text-gray-400">
<i class="fa fa-sitemap text-5xl mb-4 opacity-30"></i>
<p class="text-center max-w-md">从左侧添加根节点开始<br>或拖动节点类型到画布上</p>
</div>
<!-- 决策树 SVG 画布 -->
<svg id="tree-svg" class="w-full h-full"></svg>
<!-- 临时连接线 -->
<svg id="temp-connection" class="absolute top-0 left-0 w-full h-full pointer-events-none"></svg>
</div>
</div>
</div>
</main>
<!-- 通知提示 -->
<div id="notification" class="fixed bottom-4 right-4 px-4 py-3 rounded-md shadow-lg transform translate-y-20 opacity-0 transition-all duration-300 z-50 flex items-center max-w-xs">
<i id="notification-icon" class="mr-2 text-lg"></i>
<span id="notification-message"></span>
</div>
<script>
// 决策树数据结构
let decisionTree = {
nodes: [], // 所有节点
connections: [] // 节点间连接
};
// 当前选中的元素
let selectedNodeId = null;
let selectedConnectionId = null;
// 视图控制变量
let scale = 1;
let translateX = 0;
let translateY = 0;
let isPanning = false;
let panStart = { x: 0, y: 0 };
// 连接创建状态
let creatingConnection = false;
let connectionSource = {
nodeId: null,
handle: null // 'top' 或 'bottom'
};
let tempLine = null;
// DOM 元素引用
const treeSvg = document.getElementById('tree-svg');
const tempConnection = document.getElementById('temp-connection');
const canvasContainer = document.getElementById('canvas-container');
const emptyState = document.getElementById('empty-state');
const nodeEditor = document.getElementById('node-editor');
const currentNodeId = document.getElementById('current-node-id');
const nodeName = document.getElementById('node-name');
const nodeDescription = document.getElementById('node-description');
const decisionOptions = document.getElementById('decision-options');
const optionsContainer = document.getElementById('options-container');
const addOption = document.getElementById('add-option');
const saveNode = document.getElementById('save-node');
const deleteNode = document.getElementById('delete-node');
const addRoot = document.getElementById('add-root');
const clearCanvas = document.getElementById('clear-canvas');
const newTree = document.getElementById('new-tree');
const saveTree = document.getElementById('save-tree');
const exportTree = document.getElementById('export-tree');
const zoomIn = document.getElementById('zoom-in');
const zoomOut = document.getElementById('zoom-out');
const zoomReset = document.getElementById('zoom-reset');
const notification = document.getElementById('notification');
const notificationIcon = document.getElementById('notification-icon');
const notificationMessage = document.getElementById('notification-message');
// 初始化应用
function init() {
setupEventListeners();
checkEmptyState();
}
// 设置所有事件监听器
function setupEventListeners() {
// 根节点添加
addRoot.addEventListener('click', addRootNode);
// 清空画布和新建
clearCanvas.addEventListener('click', clearAll);
newTree.addEventListener('click', createNewTree);
// 保存和导出
saveTree.addEventListener('click', saveToLocalStorage);
exportTree.addEventListener('click', exportAsJson);
// 节点编辑
saveNode.addEventListener('click', saveNodeChanges);
deleteNode.addEventListener('click', deleteSelectedNode);
addOption.addEventListener('click', addNewOption);
// 选项删除事件委托
optionsContainer.addEventListener('click', (e) => {
if (e.target.closest('.remove-option')) {
const optionItem = e.target.closest('.option-item');
optionItem.remove();
}
});
// 缩放控制
zoomIn.addEventListener('click', () => zoom(0.1));
zoomOut.addEventListener('click', () => zoom(-0.1));
zoomReset.addEventListener('click', resetZoom);
// 画布拖动
canvasContainer.addEventListener('mousedown', startPan);
document.addEventListener('mousemove', pan);
document.addEventListener('mouseup', endPan);
canvasContainer.addEventListener('wheel', handleWheelZoom);
// 空白处点击取消选择
treeSvg.addEventListener('click', (e) => {
if (e.target === treeSvg) {
deselectAll();
}
});
// 键盘事件 - 删除连接
document.addEventListener('keydown', (e) => {
if (e.key === 'Delete' && selectedConnectionId) {
deleteSelectedConnection();
}
});
// 节点拖放功能
setupNodeDragAndDrop();
// 窗口大小变化时重绘
window.addEventListener('resize', renderTree);
}
// 设置节点拖放功能
function setupNodeDragAndDrop() {
const nodeTemplates = document.querySelectorAll('.node-template');
// 使模板可拖动
nodeTemplates.forEach(template => {
template.setAttribute('draggable', true);
template.addEventListener('dragstart', (e) => {
e.dataTransfer.setData('text/plain', template.dataset.type);
template.classList.add('opacity-50');
});
template.addEventListener('dragend', () => {
template.classList.remove('opacity-50');
});
});
// 画布接收拖放
canvasContainer.addEventListener('dragover', (e) => {
e.preventDefault();
canvasContainer.classList.add('bg-gray-100');
});
canvasContainer.addEventListener('dragleave', () => {
canvasContainer.classList.remove('bg-gray-100');
});
canvasContainer.addEventListener('drop', (e) => {
e.preventDefault();
canvasContainer.classList.remove('bg-gray-100');
const nodeType = e.dataTransfer.getData('text/plain');
const rect = canvasContainer.getBoundingClientRect();
// 计算相对于画布的位置（考虑缩放和平移）
const x = (e.clientX - rect.left - translateX) / scale;
const y = (e.clientY - rect.top - translateY) / scale;
addNode(nodeType, x, y);
});
}
// 添加根节点
function addRootNode() {
if (decisionTree.nodes.length > 0) {
if (!confirm('已存在节点，添加新根节点将清除现有决策树。继续？')) {
return;
}
clearAll(false);
}
const rect = canvasContainer.getBoundingClientRect();
const centerX = rect.width / 2;
const centerY = rect.height / 2;
const nodeId = addNode('decision', centerX, centerY, '根决策', '请编辑此决策节点');
selectNode(nodeId);
showNotification('success', '根节点已添加');
}
// 添加新节点
function addNode(type, x, y, name = '', description = '') {
const nodeId = 'node_' + Date.now();
const defaultName = type === 'decision' ? '新决策' : '新结果';
const node = {
id: nodeId,
type: type,
x: x,
y: y,
name: name || defaultName,
description: description || '',
options: type === 'decision' ? ['选项 1', '选项 2'] : []
};
decisionTree.nodes.push(node);
renderTree();
checkEmptyState();
return nodeId;
}
// 选择节点
function selectNode(nodeId) {
// 先取消其他选择
deselectAll();
const node = decisionTree.nodes.find(n => n.id === nodeId);
if (!node) return;
selectedNodeId = nodeId;
currentNodeId.value = nodeId;
// 更新编辑面板
nodeName.value = node.name;
nodeDescription.value = node.description;
// 显示/隐藏决策选项
if (node.type === 'decision') {
decisionOptions.classList.remove('hidden');
renderOptions(node.options);
} else {
decisionOptions.classList.add('hidden');
}
// 显示编辑面板
nodeEditor.classList.remove('hidden');
// 重绘以高亮选中节点
renderTree();
}
// 选择连接
function selectConnection(connectionId) {
// 先取消其他选择
deselectAll();
selectedConnectionId = connectionId;
renderTree();
// 隐藏节点编辑面板
nodeEditor.classList.add('hidden');
}
// 取消所有选择
function deselectAll() {
selectedNodeId = null;
selectedConnectionId = null;
nodeEditor.classList.add('hidden');
renderTree();
}
// 渲染选项列表
function renderOptions(options) {
optionsContainer.innerHTML = '';
options.forEach(optionText => {
addOptionElement(optionText);
});
}
// 添加选项元素
function addOptionElement(optionText = '') {
const optionItem = document.createElement('div');
optionItem.className = 'option-item flex items-center gap-2 mb-2';
optionItem.innerHTML = `
<input type="text" class="option-text flex-1 px-3 py-1.5 border border-gray-300 rounded-md text-sm"
value="${optionText}" placeholder="选项内容">
<button type="button" class="remove-option p-1.5 text-red-500 hover:bg-red-50 rounded-full transition-colors">
<i class="fa fa-times"></i>
</button>
`;
optionsContainer.appendChild(optionItem);
}
// 添加新选项
function addNewOption() {
addOptionElement();
}
// 保存节点更改
function saveNodeChanges() {
if (!selectedNodeId) return;
const node = decisionTree.nodes.find(n => n.id === selectedNodeId);
if (!node) return;
// 验证名称
const nodeNameVal = nodeName.value.trim();
if (!nodeNameVal) {
showNotification('error', '节点名称不能为空');
nodeName.focus();
return;
}
// 更新基本信息
node.name = nodeNameVal;
node.description = nodeDescription.value.trim();
// 更新选项（仅决策节点）
if (node.type === 'decision') {
const optionInputs = optionsContainer.querySelectorAll('.option-text');
node.options = Array.from(optionInputs)
.map(input => input.value.trim())
.filter(text => text);
// 确保至少有一个选项
if (node.options.length === 0) {
node.options = ['选项 1'];
renderOptions(node.options);
}
}
renderTree();
showNotification('success', '节点已更新');
}
// 删除选中节点
function deleteSelectedNode() {
if (!selectedNodeId) return;
if (confirm('确定要删除此节点吗？相关连接也将被删除。')) {
// 删除节点
decisionTree.nodes = decisionTree.nodes.filter(n => n.id !== selectedNodeId);
// 删除相关连接
decisionTree.connections = decisionTree.connections.filter(conn =>
conn.source !== selectedNodeId && conn.target !== selectedNodeId
);
deselectAll();
renderTree();
checkEmptyState();
showNotification('success', '节点已删除');
}
}
// 删除选中连接
function deleteSelectedConnection() {
if (!selectedConnectionId) return;
decisionTree.connections = decisionTree.connections.filter(conn =>
conn.id !== selectedConnectionId
);
deselectAll();
renderTree();
showNotification('success', '连接已删除');
}
// 渲染决策树
function renderTree() {
// 清空SVG
treeSvg.innerHTML = '';
// 应用缩放和平移
treeSvg.style.transform = `translate(${translateX}px, ${translateY}px) scale(${scale})`;
// 创建箭头标记
const defs = document.createElementNS('http://www.w3.org/2000/svg', 'defs');
// 普通箭头
const marker = document.createElementNS('http://www.w3.org/2000/svg', 'marker');
marker.setAttribute('id', 'arrowhead');
marker.setAttribute('viewBox', '0 -5 10 10');
marker.setAttribute('refX', '20');
marker.setAttribute('refY', '0');
marker.setAttribute('orient', 'auto');
marker.setAttribute('markerWidth', '6');
marker.setAttribute('markerHeight', '6');
const arrow = document.createElementNS('http://www.w3.org/2000/svg', 'path');
arrow.setAttribute('d', 'M 0,-5 L 10,0 L 0,5');
arrow.setAttribute('fill', '#94A3B8');
marker.appendChild(arrow);
defs.appendChild(marker);
// 选中状态箭头
const selectedMarker = document.createElementNS('http://www.w3.org/2000/svg', 'marker');
selectedMarker.setAttribute('id', 'selected-arrowhead');
selectedMarker.setAttribute('viewBox', '0 -5 10 10');
selectedMarker.setAttribute('refX', '20');
selectedMarker.setAttribute('refY', '0');
selectedMarker.setAttribute('orient', 'auto');
selectedMarker.setAttribute('markerWidth', '6');
selectedMarker.setAttribute('markerHeight', '6');
const selectedArrow = document.createElementNS('http://www.w3.org/2000/svg', 'path');
selectedArrow.setAttribute('d', 'M 0,-5 L 10,0 L 0,5');
selectedArrow.setAttribute('fill', '#4F46E5');
selectedMarker.appendChild(selectedArrow);
defs.appendChild(selectedMarker);
treeSvg.appendChild(defs);
// 绘制连接线
drawConnections();
// 绘制节点
drawNodes();
}
// 绘制连接线
function drawConnections() {
decisionTree.connections.forEach(connection => {
const sourceNode = decisionTree.nodes.find(n => n.id === connection.source);
const targetNode = decisionTree.nodes.find(n => n.id === connection.target);
if (!sourceNode || !targetNode) return;
// 计算节点连接点坐标
let sourceX = sourceNode.x;
let sourceY = connection.sourceHandle === 'top'
? sourceNode.y - 30 // 节点高度的一半
: sourceNode.y + 30;
let targetX = targetNode.x;
let targetY = connection.targetHandle === 'top'
? targetNode.y - 30
: targetNode.y + 30;
// 创建连接组，使连接可点击
const connectionGroup = document.createElementNS('http://www.w3.org/2000/svg', 'g');
connectionGroup.setAttribute('id', `connection_${connection.id}`);
connectionGroup.setAttribute('class', 'connection-group cursor-pointer');
// 创建路径
const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
// 计算曲线控制点 - 根据连接方向优化路径
const dx = Math.abs(targetX - sourceX);
const controlDistance = Math.max(dx / 2, 50); // 确保有足够的弯曲
let controlX1, controlX2;
if (connection.sourceHandle === 'top') {
// 顶部连接使用垂直曲线
controlX1 = sourceX;
controlX2 = targetX;
} else {
// 底部连接使用水平曲线
controlX1 = sourceX + controlDistance;
controlX2 = targetX - controlDistance;
}
// 创建贝塞尔曲线路径
const d = `M ${sourceX} ${sourceY} C ${controlX1} ${sourceY}, ${controlX2} ${targetY}, ${targetX} ${targetY}`;
path.setAttribute('d', d);
path.setAttribute('class', selectedConnectionId === connection.id ? 'connection-path-selected' : 'connection-path');
path.setAttribute('marker-end', selectedConnectionId === connection.id ? 'url(#selected-arrowhead)' : 'url(#arrowhead)');
// 添加点击事件
connectionGroup.addEventListener('click', (e) => {
e.stopPropagation();
selectConnection(connection.id);
});
// 添加到组
connectionGroup.appendChild(path);
// 添加选项文本标签
if (connection.optionText) {
const pathLength = path.getTotalLength();
const midPoint = path.getPointAtLength(pathLength / 2);
const text = document.createElementNS('http://www.w3.org/2000/svg', 'text');
text.setAttribute('x', midPoint.x);
text.setAttribute('y', midPoint.y - 8);
text.setAttribute('text-anchor', 'middle');
text.setAttribute('class', selectedConnectionId === connection.id ? 'connection-label-selected' : 'connection-label');
text.textContent = connection.optionText;
connectionGroup.appendChild(text);
}
treeSvg.appendChild(connectionGroup);
});
}
// 绘制节点
function drawNodes() {
decisionTree.nodes.forEach(node => {
// 创建节点组
const nodeGroup = document.createElementNS('http://www.w3.org/2000/svg', 'g');
nodeGroup.setAttribute('id', node.id);
nodeGroup.setAttribute('transform', `translate(${node.x}, ${node.y})`);
nodeGroup.setAttribute('class', 'node-group cursor-pointer');
// 节点背景
const nodeWidth = 120;
const nodeHeight = 60;
const cornerRadius = 6;
const nodeBg = document.createElementNS('http://www.w3.org/2000/svg', 'rect');
nodeBg.setAttribute('width', nodeWidth);
nodeBg.setAttribute('height', nodeHeight);
nodeBg.setAttribute('rx', cornerRadius);
nodeBg.setAttribute('ry', cornerRadius);
nodeBg.setAttribute('x', -nodeWidth / 2);
nodeBg.setAttribute('y', -nodeHeight / 2);
// 设置节点样式
if (node.type === 'decision') {
nodeBg.setAttribute('fill', '#EEF2FF');
nodeBg.setAttribute('stroke', '#4F46E5');
nodeBg.setAttribute('stroke-width', selectedNodeId === node.id ? '2' : '1');
} else {
nodeBg.setAttribute('fill', '#ECFDF5');
nodeBg.setAttribute('stroke', '#10B981');
nodeBg.setAttribute('stroke-width', selectedNodeId === node.id ? '2' : '1');
}
// 添加选中状态样式
if (selectedNodeId === node.id) {
nodeBg.classList.add('node-selected');
} else {
nodeBg.classList.add('node-shadow');
}
// 节点文本
const nodeText = document.createElementNS('http://www.w3.org/2000/svg', 'text');
nodeText.setAttribute('x', 0);
nodeText.setAttribute('y', 0);
nodeText.setAttribute('text-anchor', 'middle');
nodeText.setAttribute('dominant-baseline', 'middle');
nodeText.setAttribute('font-size', '14');
nodeText.setAttribute('fill', node.type === 'decision' ? '#4F46E5' : '#10B981');
// 处理长文本
const displayText = node.name.length > 12 ? node.name.substring(0, 10) + '...' : node.name;
nodeText.textContent = displayText;
// 顶部连接点
const topHandle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
topHandle.setAttribute('cx', 0);
topHandle.setAttribute('cy', -nodeHeight / 2);
topHandle.setAttribute('r', 6);
topHandle.setAttribute('fill', 'white');
topHandle.setAttribute('stroke', '#94A3B8');
topHandle.setAttribute('stroke-width', '1.5');
topHandle.setAttribute('class', 'connection-handle');
topHandle.setAttribute('data-handle', 'top');
topHandle.setAttribute('title', '拖动创建连接');
// 底部连接点
const bottomHandle = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
bottomHandle.setAttribute('cx', 0);
bottomHandle.setAttribute('cy', nodeHeight / 2);
bottomHandle.setAttribute('r', 6);
bottomHandle.setAttribute('fill', 'white');
bottomHandle.setAttribute('stroke', '#94A3B8');
bottomHandle.setAttribute('stroke-width', '1.5');
bottomHandle.setAttribute('class', 'connection-handle');
bottomHandle.setAttribute('data-handle', 'bottom');
bottomHandle.setAttribute('title', '拖动创建连接');
// 添加到组
nodeGroup.appendChild(nodeBg);
nodeGroup.appendChild(nodeText);
nodeGroup.appendChild(topHandle);
nodeGroup.appendChild(bottomHandle);
// 添加到SVG
treeSvg.appendChild(nodeGroup);
// 设置节点事件
setupNodeEvents(nodeGroup, node.id);
});
}
// 设置节点事件
function setupNodeEvents(nodeElement, nodeId) {
let isDraggingNode = false;
let nodeStartPos = { x: 0, y: 0 };
let mouseStartPos = { x: 0, y: 0 };
// 节点点击事件
nodeElement.addEventListener('click', (e) => {
// 如果点击的是连接点，则不触发节点选择
if (e.target.classList.contains('connection-handle') ||
e.target.closest('.connection-handle')) {
return;
}
e.stopPropagation();
selectNode(nodeId);
});
// 节点鼠标按下事件
nodeElement.addEventListener('mousedown', (e) => {
// 如果点击的是连接点，则开始创建连接
const handle = e.target.closest('.connection-handle');
if (handle) {
const handleType = handle.getAttribute('data-handle');
startConnection(nodeId, handleType, e);
return;
}
e.stopPropagation();
isDraggingNode = true;
const node = decisionTree.nodes.find(n => n.id === nodeId);
if (node) {
nodeStartPos = { x: node.x, y: node.y };
}
mouseStartPos = {
x: e.clientX,
y: e.clientY
};
nodeElement.style.cursor = 'grabbing';
});
// 节点拖动
document.addEventListener('mousemove', (e) => {
if (isDraggingNode && !creatingConnection) {
const dx = (e.clientX - mouseStartPos.x) / scale;
const dy = (e.clientY - mouseStartPos.y) / scale;
const node = decisionTree.nodes.find(n => n.id === nodeId);
if (node) {
node.x = nodeStartPos.x + dx;
node.y = nodeStartPos.y + dy;
renderTree();
}
}
});
// 结束拖动
document.addEventListener('mouseup', () => {
if (isDraggingNode) {
isDraggingNode = false;
nodeElement.style.cursor = 'pointer';
}
});
}
// 开始创建连接
function startConnection(sourceId, handleType, e) {
creatingConnection = true;
connectionSource = {
nodeId: sourceId,
handle: handleType
};
// 获取源节点
const sourceNode = decisionTree.nodes.find(n => n.id === sourceId);
if (!sourceNode) return;
// 创建临时连接线
tempConnection.innerHTML = '';
tempLine = document.createElementNS('http://www.w3.org/2000/svg', 'path');
tempLine.setAttribute('class', 'connection-path');
tempConnection.appendChild(tempLine);
// 创建临时箭头
const defs = document.createElementNS('http://www.w3.org/2000/svg', 'defs');
const marker = document.createElementNS('http://www.w3.org/2000/svg', 'marker');
marker.setAttribute('id', 'temp-arrowhead');
marker.setAttribute('viewBox', '0 -5 10 10');
marker.setAttribute('refX', '20');
marker.setAttribute('refY', '0');
marker.setAttribute('orient', 'auto');
marker.setAttribute('markerWidth', '6');
marker.setAttribute('markerHeight', '6');
const arrow = document.createElementNS('http://www.w3.org/2000/svg', 'path');
arrow.setAttribute('d', 'M 0,-5 L 10,0 L 0,5');
arrow.setAttribute('fill', '#94A3B8');
marker.appendChild(arrow);
defs.appendChild(marker);
tempConnection.appendChild(defs);
tempLine.setAttribute('marker-end', 'url(#temp-arrowhead)');
// 鼠标移动时更新临时线
const moveHandler = (e) => {
if (!creatingConnection) return;
const rect = canvasContainer.getBoundingClientRect();
// 计算源点在屏幕上的位置
let sourceX = sourceNode.x * scale + translateX;
let sourceY = handleType === 'top'
? (sourceNode.y - 30) * scale + translateY
: (sourceNode.y + 30) * scale + translateY;
// 鼠标位置（屏幕坐标）
const mouseX = e.clientX - rect.left;
const mouseY = e.clientY - rect.top;
// 更新临时线
const dx = Math.abs(mouseX - sourceX);
const controlDistance = Math.max(dx / 2, 50);
let controlX1, controlX2;
if (handleType === 'top') {
controlX1 = sourceX;
controlX2 = mouseX;
} else {
controlX1 = sourceX + controlDistance;
controlX2 = mouseX - controlDistance;
}
const d = `M ${sourceX} ${sourceY} C ${controlX1} ${sourceY}, ${controlX2} ${mouseY}, ${mouseX} ${mouseY}`;
tempLine.setAttribute('d', d);
};
// 鼠标释放时处理连接
const upHandler = (e) => {
if (!creatingConnection) return;
// 移除事件监听
document.removeEventListener('mousemove', moveHandler);
document.removeEventListener('mouseup', upHandler);
// 清除临时线
tempConnection.innerHTML = '';
creatingConnection = false;
// 检查是否点击了目标节点的连接点
const targetElement = e.target.closest('.node-group');
if (targetElement && targetElement.id !== sourceId) {
const targetNodeId = targetElement.id;
// 确定目标节点的哪个连接点被点击
const rect = targetElement.getBoundingClientRect();
const centerY = rect.top + rect.height / 2;
const targetHandle = e.clientY < centerY ? 'top' : 'bottom';
// 检查连接是否已存在
const connectionExists = decisionTree.connections.some(conn =>
conn.source === sourceId &&
conn.target === targetNodeId &&
conn.sourceHandle === handleType &&
conn.targetHandle === targetHandle
);
if (!connectionExists) {
// 获取源节点
const sourceNode = decisionTree.nodes.find(n => n.id === sourceId);
// 对于决策节点，使用第一个选项作为连接文本
let optionText = '';
if (sourceNode.type === 'decision' && sourceNode.options.length > 0) {
optionText = sourceNode.options[0];
}
// 创建新连接
decisionTree.connections.push({
id: 'conn_' + Date.now(),
source: sourceId,
target: targetNodeId,
sourceHandle: handleType,
targetHandle: targetHandle,
optionText: optionText
});
renderTree();
showNotification('success', '连接已创建');
} else {
showNotification('warning', '连接已存在');
}
}