大编辑
分析了我的情况，这似乎是另一个问题/另一种情况，更普遍的是关于保存到 json。
因此，我使用以下代码向舞台上的图层添加了一个新的 Shapegroup：
...
var selectedShape, json = null;
...
function addNode(xPos, yPos)
{
//create the new node
var node = new Kinetic.Circle({
id: 'myRect',
x: xPos,
y: yPos,
radius: 30,
fill: '#FFFFFF',
stroke: '#000000',
strokeWidth: 4,
// test: "testattr"
});
// create the label
var label = new Kinetic.Text({
x: node.getX() - node.getRadius() + 10,
y: node.getY() + node.getRadius() + 4,
text: 'node',
fontSize: 12,
fontFamily: 'Arial',
fill: 'black',
});
// create group
var nodeGroup = new Kinetic.Group({
draggable: true
});
// add shapes to group
nodeGroup.add(node);
nodeGroup.add(label);
// add group to the layer
layer.add(nodeGroup);
// add layer to the stage
stage.add(layer);
/*
* Events for Nodes
* all events for the actual states / nodes
*/
// mouse over => red stroke
node.on('mouseover', function() {
$('body').css('cursor', 'pointer');
this.setStroke('red');
layer.draw();
});
// mouse out => back in black
node.on('mouseout', function() {
if(selectedShape != this){
console.log('mouseout fired, Position: ' + node.getX());
$('body').css('cursor', 'default');
this.setStroke('#000000');
writeMessage(messageLayer, node.getX()); // just for testing purposes
layer.draw();
}
});
node.on('click tap', function(){ //relevant
if(selectedShape != null){
$('body').css('cursor', 'default');
selectedShape.setStroke('#000000');
layer.draw();
}
selectedShape = null;
console.log('clicked');
selectedShape = this;
this.setStroke('red');
layer.draw();
});
/*
* Events for Node-labels
* events for labels
*/
label.on('mouseover', function() {
$('body').css('cursor', 'text');
this.setStroke('red');
this.setStrokeWidth(0.5)
layer.draw();
});
label.on('mouseout', function() {
$('body').css('cursor', 'default');
this.setStroke('');
this.setStrokeWidth(0);
layer.draw();
});
//change the Label of a node, return 'node' if nothing entered or cancelled.
label.on('click', function(){
var lblTxt = prompt('Neue Bezeichnung:', '');
if (lblTxt) {
this.setText(lblTxt);
} else {
this.setText('node');
}
layer.draw();
});
}
有一个按钮“添加新状态”，它实际上添加了一个新组。代码：
$('#createNode').click(function(e){
addNode(125, 125);
});
还有一个“删除状态”按钮，用于删除选定的节点组。代码：
$('#removeNode').click(function(e){
if(selectedShape){
var selectedGroup = selectedShape.getParent();
selectedGroup.removeChildren();
selectedGroup.remove();
layer.draw();
} else {
writeMessage(messageLayer, 'No Object chosen');
}
});
此外，还有一个“保存到 json”按钮，我想在其中保存舞台上所有实际剩余的形状。代码：
$('#saveJSON').click(function(e){
json = null;
json = stage.toJSON();
console.log(json);
});
所以，现在我测试以下情况：
案例1：保存空阶段
JSON输出：
{
"attrs": {
"width": 960,
"height": 600
},
"className": "Stage",
"children": [
{
"attrs": {},
"className": "Layer",
"children": []
}
]
}
状态：好像没问题。因此，最后一个 } 的格式问题取决于 stackoverflow，它应该（并且是）实际上包含在代码标记中。
案例2：保存空舞台后添加一个节点（这里双击/点击或使用按钮没有区别）。再次保存。
JSON输出：
{
"attrs": {
"width": 960,
"height": 600
},
"className": "Stage",
"children": [
{
"attrs": {},
"className": "Layer",
"children": []
},
{
"attrs": {},
"className": "Layer",
"children": [
{
"attrs": {
"draggable": true
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "#000000",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
}
]
}
]
}
状态：为什么有一个空层？但是：一组，两个对象，似乎还可以。
案例3
添加另一个节点。节省。
JSON输出：
{
"attrs": {
"width": 960,
"height": 600
},
"className": "Stage",
"children": [
{
"attrs": {},
"className": "Layer",
"children": []
},
{
"attrs": {},
"className": "Layer",
"children": [
{
"attrs": {
"draggable": true
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "#000000",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
},
{
"attrs": {
"draggable": true,
"x": 206,
"y": 75,
"rotation": 0,
"scaleX": 1,
"scaleY": 1,
"offsetX": 0,
"offsetY": 0,
"skewX": 0,
"skewY": 0
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "red",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
}
]
},
{
"attrs": {},
"className": "Layer",
"children": [
{
"attrs": {
"draggable": true
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "#000000",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
},
{
"attrs": {
"draggable": true,
"x": 206,
"y": 75,
"rotation": 0,
"scaleX": 1,
"scaleY": 1,
"offsetX": 0,
"offsetY": 0,
"skewX": 0,
"skewY": 0
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "red",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
}
]
}
]
}
状态：在这里你可以看到我的问题的第一次出现：我舞台上的所有对象都在我的 JSON 文件中的两个不同层上加倍。因此，当添加更多对象时，它们会增加三倍，依此类推。我的问题：我想添加一个数据模型并将数据与数据库一起使用，所以我认为这很混乱，但我不知道我哪里出错了。
** 案例 4** 从我的舞台上删除除一个节点外的所有节点：
JSON输出：
{
"attrs": {
"width": 960,
"height": 600
},
"className": "Stage",
"children": [
{
"attrs": {},
"className": "Layer",
"children": []
},
{
"attrs": {},
"className": "Layer",
"children": [
{
"attrs": {
"draggable": true
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "#000000",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
}
]
},
{
"attrs": {},
"className": "Layer",
"children": [
{
"attrs": {
"draggable": true
},
"className": "Group",
"children": [
{
"attrs": {
"id": "myRect",
"x": 125,
"y": 125,
"radius": 30,
"fill": "#FFFFFF",
"stroke": "#000000",
"strokeWidth": 4,
"test": "testattr"
},
"className": "Circle"
},
{
"attrs": {
"width": "auto",
"height": "auto",
"x": 105,
"y": 159,
"text": "node",
"fontSize": 12,
"fontFamily": "Arial",
"fill": "black"
},
"className": "Text"
}
]
}
]
}
]
}
状态：同样，剩余节点翻倍。
**案例5**：移除所有节点，再次有一个空阶段（添加2个节点后，然后移除它们）
JSON输出：
{
"attrs": {
"width": 960,
"height": 600
},
"className": "Stage",
"children": [
{
"attrs": {},
"className": "Layer",
"children": []
},
{
"attrs": {},
"className": "Layer",
"children": []
},
{
"attrs": {},
"className": "Layer",
"children": []
}
]
}
状态：阶段为空，但仍保留层。不是很好。
结论：我认为我做错了什么。这个问题中有很多 JSON，我希望有人真正通读这个问题，并可以帮助我弄清楚我做错了什么。会很棒。
最好的问候， 多米尼克
另一个编辑 问题似乎是在 addnode-function 中，使用 stage.add(layer); 添加新的形状组。非常感谢一种将新组添加到一层的不同方法，因为我对 kineticjs 还很陌生并且还不知道它。