d3js缩放圈子组 [英] d3js zooming groups of circles
问题描述
我第一次尝试d3.js缩放行为,我很努力得到它的工作。我的要求是有一个放大,缩小行为在svg元素,其中浏览器的缩放行为应该禁用,只有svg中的圆圈应该增加/减少其半径放大/缩小。
总之,当用户滚动鼠标时,svg的宽度,高度不应该改变。只是圈子应该改变其半径。
这是我现在,任何人都可以帮助我填补它?
< g&
< circle id ='top'cx =180cy =120r =30style =stroke:white; stroke-width:2px; fill:white/>
< / g>
< g>
< circle id ='top'cx =200cy =220r =30style =stroke:white; stroke-width:2px; fill:white/>
< / g>
< g>
< circle id ='top'cx =320cy =150r =50style =stroke:white; stroke-width:2px; fill:white/>
< / g>
var zoom = d3.behavior.zoom()
.scaleExtent([1,8])
.on(zoom,function(){
console .log('zoom');
var graph = d3.select('svg');
graph
.selectAll('g')
.attr(transform,translate(+ d3.event.translate +)scale(+ d3.event.scale +));
} );
var svg = d3.select('svg')。append('g')。call(zoom);
将缩放监听器绑定到SVG
$ b 更改下列代码行
var svg = d3 .select('svg')。append('g')。call(zoom);
至
var svg = d3.select('svg')。call(zoom);
完成代码:
var zoom = d3.behavior.zoom()
.scaleExtent([1,8])
.on(zoom,function {
var graph = d3.select('svg');
graph
.selectAll('g')
.attr(transform,translate .event.translate +)scale(+ d3.event.scale +));
});
var svg = d3.select('svg')。call(zoom);
这里是工作的 JSFiddle
I am trying d3.js zoom behavior for the first time, I am quite struggling to get it worked. My requirement is to have a zoom in, zoom out behaviour in a svg element where browser's zoom behaviour should be disabled and only the circles inside the svg should increase/decrease its radius upon zoom in/out.
In summary, when the user scrolls the mouse the svg width, height should not change. Just the circles should change its radius.
This is what I have now, can anyone help me to fill it in?
<g>
<circle id='top' cx="180" cy="120" r="30" style="stroke: white; stroke-width: 2px; fill:white"/>
</g>
<g>
<circle id='top' cx="200" cy="220" r="30" style="stroke: white; stroke-width: 2px; fill:white"/>
</g>
<g>
<circle id='top' cx="320" cy="150" r="50" style="stroke: white; stroke-width: 2px; fill:white"/>
</g>
var zoom = d3.behavior.zoom()
.scaleExtent([1, 8])
.on("zoom", function () {
console.log('zooming');
var graph = d3.select('svg');
graph
.selectAll('g')
.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
});
var svg = d3.select('svg').append('g').call(zoom);
Bind the zoom listener to the SVG instead of the new group.
Change following line of code
var svg = d3.select('svg').append('g').call(zoom);
To
var svg = d3.select('svg').call(zoom);
Complete Code:
var zoom = d3.behavior.zoom()
.scaleExtent([1, 8])
.on("zoom", function() {
var graph = d3.select('svg');
graph
.selectAll('g')
.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
});
var svg = d3.select('svg').call(zoom);
Here is the working JSFiddle
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