我正在使用D3渲染可折叠树。
(function () {
Ext.define("d3.widgets.Treeview", {
extend: 'Ext.Panel',
alias: 'widget.d3_treeview',
tree: '',
svg: '',
duration: 1000,
diagonal: '',
i: 0,
me: null,
constructor: function (config) {
console.log('1) Tree View Constructor called');
this.callParent([config]);
console.log("Treeview - constructor FINISH");
me = this;
},
initComponent: function () {
console.log('2) Tree View initComponent called');
this.on('afterRender', function(){
this.loadScript(this.onD3Loaded, this);
}, this);
this.callParent(arguments);
},
/* afterRender: function () {
console.log('4) Tree View afterRender called');
this.loadScript(this.onD3Loaded, this);
return this.callParent(arguments);
}, */
loadScript: function (callback, scope) {
console.log('5) loadScript called');
Ext.Loader.injectScriptElement('http://d3js.org/d3.v3.js', this.onLoad, this.onError, this);
console.log('Treeview - D3 script loaded ');
},
onError: function () {
console.log('Treeview On Error');
},
onLoad1: function () {
console.log('Treeview On onLoad1');
},
onD3Loaded: function () {
console.log('Treeview onD3Loaded - D3 script load callback');
},
onLoad: function () {
console.log('Tree View Store --------------------------- ');
var data = [{ "name": "Orders", "parent": ""},
{ "name": "Order-No: ON57677", "parent": "Orders"},
{ "name": "Vehicle-No: VN33255", "parent": "Order-No: ON57677"},
{ "name": "Make: BMW", "parent": "Vehicle-No: VN33255"},
{ "name": "Model: Z4", "parent": "Vehicle-No: VN33255"},
{ "name": "VIN: 52465236", "parent": "Vehicle-No: VN33255"},
{ "name": "Vehicle-No: VN22345", "parent": "Order-No: ON57677"},
{ "name": "Make: Chevrolet", "parent": "Vehicle-No: VN22345"},
{ "name": "Model: SS 454", "parent": "Vehicle-No: VN22345"},
{ "name": "VIN: 32659852", "parent": "Vehicle-No: VN22345"},
{ "name": "Vehicle-No: VN11234", "parent": "Order-No: ON57677"},
{ "name": "Make: Ford", "parent": "Vehicle-No: VN11234"},
{ "name": "Model: Fiesta", "parent": "Vehicle-No: VN11234"},
{ "name": "VIN: 45218569", "parent": "Vehicle-No: VN11234"}];
var dataMap = data.reduce(function (map, node) {
map[node.name] = node;
return map;
}, {});
console.log('dataMap --' + dataMap);
var treeData = [];
data.forEach(function (node) {
// add to parent
var parent = dataMap[node.parent];
if (parent) {
// create child array if it doesn't exist
(parent.children || (parent.children = []))
// add node to child array
.push(node);
} else {
// parent is null or missing
treeData.push(node);
}
});
console.log('treeData --' + treeData);
// ************** Generate the tree diagram *****************
var margin = {
top: 20,
right: 120,
bottom: 20,
left: 120
},
width = 960 - margin.right - margin.left,
height = 500 - margin.top - margin.bottom;
// var i = 0;
i=0;
// var duration = 1000;
duration = 1000;
// var tree = d3.layout.tree()
tree = d3.layout.tree()
.size([height, width]);
// var diagonal = d3.svg.diagonal()
diagonal = d3.svg.diagonal()
.projection(function (d) {
return [d.y, d.x];
});
d3.select("#treesvg").remove();
svg = d3.select("#tree").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("id","treesvg");
root = treeData[0];
this.update(root);
d3.select(self.frameElement).style("height", "800px");
},
update: function (source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function (d) {
d.y = d.depth * 180;
});
// Update the nodes…
var node = svg.selectAll("g.node")
.data(nodes, function (d) {
return d.id || (d.id = ++i);
});
// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("g")
.attr("class", "node")
.attr("transform", function (d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.on("click", function (d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
me.update(d);
});
nodeEnter.append("circle")
.attr("r", 1e-6)
.style("fill", function (d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeEnter.append("text")
.attr("x", function (d) {
return d.children || d._children ? -10 : 10;
})
.attr("dy", ".35em")
.attr("text-anchor", function (d) {
return d.children || d._children ? "end" : "start";
})
.text(function (d) {
return d.name;
})
.style("fill-opacity", 1e-6);
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function (d) {
return "translate(" + d.y + "," + d.x + ")";
});
nodeUpdate.select("circle")
.attr("r", 4.5)
.style("fill", function (d) {
return d._children ? "lightsteelblue" : "#fff";
});
nodeUpdate.select("text")
.style("fill-opacity", 1);
// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function (d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
nodeExit.select("circle")
.attr("r", 1e-6);
nodeExit.select("text")
.style("fill-opacity", 1e-6);
// Update the links…
var link = svg.selectAll("path.link")
.data(links, function (d) {
return d.target.id;
});
// Enter any new links at the parent's previous position.
link.enter().insert("path", "g")
.attr("class", "link")
.attr("d", function (d) {
var o = {
x: source.x0,
y: source.y0
};
return diagonal({
source: o,
target: o
});
});
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function (d) {
var o = {
x: source.x,
y: source.y
};
return diagonal({
source: o,
target: o
});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function (d) {
d.x0 = d.x;
d.y0 = d.y;
});
},
// Toggle children on click.
/* click: function(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
},
*/
onRender: function (ct, position) {
console.log('3) onRender called ');
this.callParent(arguments);
},
setValue: function (value) {
console.log('Set Value called');
this.callParent(arguments)
},
getValue: function () {
console.log('Get Value called');
return '';
},
});
})();
Ext.create('d3.widgets.Treeview', {
renderTo : Ext.getBody()
});.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="http://cdn.sencha.com/ext/gpl/4.2.0/ext-all.js" charset="utf-8"></script>
<body>
<div id="tree"></div>
</body>此D3树在Ext JS应用程序中呈现。根据用户选择的订单号，显示树的相关部分。例如，如果选择了“订货号：ON31225”，则会显示“订货号：ON31225”及其相关项目。
当用户首次选择订单时，一切都会按预期进行。源代码中也有一个svg元素。
目的是当用户单击第二个订单时，该图将刷新并显示新的订单号。
但是，现在，它最终创建了另一个svg元素，并继续显示旧图。
我需要一种删除旧的svg元素并将其替换为新的svg元素的方法，以便每当用户选择OrderNumer时，都会显示该Order的树。
有人可以帮忙吗？
谢谢
最佳答案
替换此代码：
d3.select("#treesvg").remove();
svg = d3.select("#tree").append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("id","treesvg");
具有以下内容：
svg = d3.select("#tree").selectAll("svg")
.data([treedata]);
svg.enter()
.append("svg")
.attr("width", width + margin.right + margin.left)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")")
.attr("id","treesvg");
关于javascript - 替换SVG元素，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30521230/