d3缩放和刷子同时工作 [英] d3 zoom and brush working at the same time
问题描述
我想知道如何同时处理缩放和画笔行为。
想象一下,您有一个应用程序可以控制选择区域选项是否激活。如果激活,那么当用户开始视觉选择时,它将刷新一组SVG元素。如果停用,那么用户将移动一些SVG容器(pan)。
如何声明两个本机d3行为,而不相互覆盖, ?或者,它是唯一的解决方案,我必须去摧毁事件,宣布新的,反之亦然,当用户想要不同的行为?
或者,是有另一种不同的方式
我拥有的一段代码如下:
var zoomer,brush;
zoomer = self.get('zoomer');
if(zoomer === undefined){
self.set({zoomer:d3.behavior.zoom()。translate([0,0])。scale(1)} );
} else {
self.zoomCurrent();
}
brush = self.get('brush');
if(brush === undefined){
self.set({brush:d3.svg.brush()。x(d3.scale.identity()。domain([0,self.get ('config')。width]))
.y(d3.scale.identity()。domain([0,self.get('config')。
}
svgObject = d3.select(self.get('target'))。append('svg')
.attr('xmlns' 'http://www.w3.org/2000/svg')
.attr('xlink','http://www.w3.org/1999/xlink')
.attr 'id',self.get('targetNoChar')+'SVG')
.attr('width',self.get('config')。width)
.attr self.get('config')。height)
.attr(pointer-events,all)
.call(self.get('zoomer')。on function(d){self.zoomFunction(d3.event,this,d)}))
.append('g')
.attr('class','zoomer')
.attr(pointer-events,all)
.append('g')
.attr(pointer-events,all);
d3.select('svg')。append('g')
.attr('class','brush')
.attr(pointer-events ,all)
.datum(function(){return {selected:false,previousSelected:false};})
.call(self.get('brush')。on('brushstart' ,function(d){self.brushStart(d3.event,this,d)})
.on('brush',function(d){self.brush(d3.event,this,d)})
.on('brushend',function(d){self.brushEnd(d3.event,this,d)}));
我如何处理d3.behaviour.zoom并且也可以不重写它们呢?
第一个解决方案:
最后,我的决定是在状态更改时重新声明事件定义,最后使用以下代码:
setAreaMode:function(){
var self = this;
if(self.get('selectAreaMode')=== true){
self.setCursorToCrosshair();
/ *停用缩放工具* /
self.get('zoomer')。on('zoom',null);
/ *添加刷子到DOM * /
d3.select('svg')。append('g')
.attr('class','brush')
.attr(pointer-events,all)
.datum(function(){return {selected:false,previouslySelected:false};});
/ *附加监听器到刷子* /
d3.select('。brush')。call(self.get('brush')。on('brushstart',function ){self.brushStart(d3.event,this,d)})
.on('brush',function(d){self.brush(d3.event,this,d)})
.on('brushend',function(d){self.brushEnd(d3.event,this,d)})
);
} else if(self.get('selectAreaMode')=== false){
self.setCursorToDefault();
/ *激活zoomer * /
self.get('zoomer')。on('zoom',function(d){self.zoomFunction(d3.event,this,d)});
/ *停用监听器画笔工具* /
d3.select('。brush')。call(self.get('brush')。on('brushstart',null)
.on('brush',null)
.on('brushend',null));
/ *从DOM中删除画笔* /
d3.select('。brush')。remove();
}
}
任何其他想法?
I would like to know how can I deal with Zoom and Brush behaviours at the same time.
Imagine you have an application that controls whether a "Select Area" option is activated or not. If activated, then when an user starts selecting visually it's expected to brush a set of SVG elements. If deactivated, then the user would be moving some SVG container (pan).
How can I declare both native d3 behaviours without overriding between each other and working properly using an state? Or, is it the only solution I have to go destroying events and declaring new ones and viceversa when the user wants a different behaviour?
Or, is there another different way of doing it?
A piece of code I have is the following one:
var zoomer, brush;
zoomer = self.get('zoomer');
if (zoomer === undefined){
self.set({zoomer: d3.behavior.zoom().translate([0,0]).scale(1)});
} else{
self.zoomCurrent();
}
brush = self.get('brush');
if (brush === undefined) {
self.set({brush: d3.svg.brush().x(d3.scale.identity().domain([0, self.get('config').width]))
.y(d3.scale.identity().domain([0, self.get('config').height]))});
}
svgObject = d3.select(self.get('target')).append('svg')
.attr('xmlns', 'http://www.w3.org/2000/svg')
.attr('xlink', 'http://www.w3.org/1999/xlink')
.attr('id', self.get('targetNoChar')+'SVG')
.attr('width',self.get('config').width)
.attr('height',self.get('config').height)
.attr("pointer-events", "all")
.call(self.get('zoomer').on("zoom", function (d) { self.zoomFunction(d3.event, this,d) }))
.append('g')
.attr('class', 'zoomer')
.attr("pointer-events", "all")
.append('g')
.attr("pointer-events", "all");
d3.select('svg').append('g')
.attr('class', 'brush')
.attr("pointer-events", "all")
.datum(function() { return { selected: false, previouslySelected: false};})
.call(self.get('brush').on('brushstart', function (d) { self.brushStart(d3.event, this,d) })
.on('brush', function (d) { self.brush(d3.event, this,d) })
.on('brushend', function (d) { self.brushEnd(d3.event, this,d) }));
How can I deal with d3.behaviour.zoom and also brush without they override each other?
Thanks a lot in advance.
FIRST SOLUTION FOUND:
Finally, my decision has been re-declaring events definition when the state changes, ending up with the following code:
setAreaMode: function () {
var self = this;
if (self.get('selectAreaMode')===true) {
self.setCursorToCrosshair();
/* Deactivating zoom tool */
self.get('zoomer').on('zoom', null);
/* Adding brush to DOM */
d3.select('svg').append('g')
.attr('class', 'brush')
.attr("pointer-events", "all")
.datum(function() { return { selected: false, previouslySelected: false};});
/* Attaching listeners to brush */
d3.select('.brush').call(self.get('brush').on('brushstart', function (d) { self.brushStart(d3.event, this,d) })
.on('brush', function (d) { self.brush(d3.event, this,d) })
.on('brushend', function (d) { self.brushEnd(d3.event, this,d) })
);
} else if (self.get('selectAreaMode')===false) {
self.setCursorToDefault();
/* Activating zoomer */
self.get('zoomer').on('zoom', function (d) { self.zoomFunction(d3.event, this,d) });
/* Deactivating listeners brush tool */
d3.select('.brush').call(self.get('brush').on('brushstart', null)
.on('brush', null)
.on('brushend', null));
/* Removing brush from DOM */
d3.select('.brush').remove();
}
}
Any other ideas?
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