我想将zoom listener(scale)与translate结合使用,使所有节点,文本和路径很好地适应viewport / d3容器。
我正在使用树形布局和力布局。
有没有办法获得所有对象的外部限制(具有高度/宽度和矩形的X + y位置的对象周围的非现有矩形)?这样就可以让我使用translate / scale来很好地适应一切。
答案 0 :(得分:1)
我试图解决这个问题时尝试了几种方法。我通过D3尝试了getBoundingClientRect()和getBBox(),但都没有给出正确的坐标。
所以我所做的就是遍历每个圈子并进入它的数据。我有一些逻辑来获得最低的左值,最高的右值,最低的最高值和最高的最低值。
为此,我只使用了这个逻辑:
var thisNodeData = allNodes[i].__data__;
var thisLeft = thisNodeData.x;
var thisRight = thisNodeData.x;
var thisTop = thisNodeData.y;
var thisBottom = thisNodeData.y;
if (i == 0) { //set it on first one
left = thisLeft;
right = thisRight;
top = thisTop;
bottom = thisBottom;
};
//overwrite values where needed
if (left > thisLeft) {
left = thisLeft
}
if (right < thisRight) {
right = thisRight
}
if (top > thisTop) {
top = thisTop
}
if (bottom < thisBottom) {
bottom = thisBottom
}
现在这些left,right,bottom和top值将是rect的值。但是,这种方式得到每个圆的中心点,以弥补这个我组成一个半径值,但这可以编程方式找到:
所以我用这些来创建一个像这样的矩形:
var circleRadius = 20;
var rectAttr = [{
x: top - circleRadius / 2,
y: left - circleRadius / 2,
width: bottom - top + circleRadius,
height: right - left + circleRadius,
}]
我必须说,我搞砸了这些价值观。你会认为x 将会离开,你会是最好的,但这并没有得到正确的结果。 如果有人能告诉我这里做错了什么,那就是 赞赏。但是现在这种方法很好,它看起来并不像 正确的逻辑。
现在使用rectAttr创建边界矩形:
svg.selectAll('rectangle')
.data(rectAttr)
.enter() //.append('svg')
.append('rect')
.attr('x', function(d) {
return d.x;
})
.attr('y', function(d) {
return d.y;
})
.attr('width', function(d) {
return d.width;
})
.attr('height', function(d) {
return d.height;
})
.style('stroke', 'red').style('fill', 'none')
我已添加此功能,以便在点击节点时调用,以便我可以向您显示它的工作情况。
更新了小提琴:http://jsfiddle.net/thatOneGuy/JnNwu/916/
编辑:
现在根据尺寸进行缩放。
你需要做的就是获得新矩形与旧版相比的差异。
首先,我从矩形的宽度和高度中获得了最大值,以得到正确的比例:
var testScale = Math.max(rectAttr[0].width,rectAttr[0].height)
var widthScale = width/testScale
var heightScale = height/testScale
var scale = Math.max(widthScale,heightScale);
然后在翻译中使用此比例。要放大矩形,只需要获得中心点并相应地调整它,如下所示:
var transX = -(parseInt(d3.select('#invisRect').attr("x")) + parseInt(d3.select('#invisRect').attr("width"))/2) *scale + width/2;
var transY = -(parseInt(d3.select('#invisRect').attr("y")) + parseInt(d3.select('#invisRect').attr("height"))/2) *scale + height/2;
return 'translate(' + transX + ','+ transY + ')scale('+scale+')' ;
我还添加了这一行:
d3.select('#invisRect').remove();
在创建新的之前,否则在获取上述翻译尺寸时,我会得到错误的矩形。
最后的工作小提琴:http://jsfiddle.net/thatOneGuy/JnNwu/919/
var json = {
"name": "Base",
"children": [{
"name": "Type A",
"children": [{
"name": "Section 1",
"children": [{
"name": "Child 1"
}, {
"name": "Child 2"
}, {
"name": "Child 3"
}]
}, {
"name": "Section 2",
"children": [{
"name": "Child 1"
}, {
"name": "Child 2"
}, {
"name": "Child 3"
}]
}]
}, {
"name": "Type B",
"children": [{
"name": "Section 1",
"children": [{
"name": "Child 1"
}, {
"name": "Child 2"
}, {
"name": "Child 3"
}]
}, {
"name": "Section 2",
"children": [{
"name": "Child 1"
}, {
"name": "Child 2"
}, {
"name": "Child 3"
}]
}]
}]
};
var width = 700;
var height = 650;
var maxLabel = 150;
var duration = 500;
var radius = 5;
var i = 0;
var root;
var tree = d3.layout.tree()
.size([height, width]);
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.y, d.x];
});
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(" + maxLabel + ",0)");
root = json;
root.x0 = height / 2;
root.y0 = 0;
root.children.forEach(collapse);
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse();
var links = tree.links(nodes);
// Normalize for fixed-depth.
nodes.forEach(function(d) {
d.y = d.depth * maxLabel;
});
// 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", click);
nodeEnter.append("circle").attr('class', 'circleNode')
.attr("r", 0)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "white";
});
nodeEnter.append("text")
.attr("x", function(d) {
var spacing = computeRadius(d) + 5;
return d.children || d._children ? -spacing : spacing;
})
.attr("dy", "3")
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 0);
// 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", function(d) {
return computeRadius(d);
})
.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", 0);
nodeExit.select("text").style("fill-opacity", 0);
// 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;
});
}
function computeRadius(d) {
if (d.children || d._children) return radius + (radius * nbEndNodes(d) / 10);
else return radius;
}
function nbEndNodes(n) {
nb = 0;
if (n.children) {
n.children.forEach(function(c) {
nb += nbEndNodes(c);
});
} else if (n._children) {
n._children.forEach(function(c) {
nb += nbEndNodes(c);
});
} else nb++;
return nb;
}
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
getBoundingBox();
}
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
update(root);
getBoundingBox();
function getBoundingBox() {
var left = 0,
right = 0,
top = 0,
bottom = 0;
var allNodes = document.getElementsByTagName('circle');
for (var i = 0; i < allNodes.length; i++) {
var thisNodeData = allNodes[i].__data__;
var thisLeft = thisNodeData.x;
var thisRight = thisNodeData.x;
var thisTop = thisNodeData.y;
var thisBottom = thisNodeData.y;
if (i == 0) { //set it on first one
left = thisLeft;
right = thisRight;
top = thisTop;
bottom = thisBottom;
};
//overwrite values where needed
if (left > thisLeft) {
left = thisLeft
}
if (right < thisRight) {
right = thisRight
}
if (top > thisTop) {
top = thisTop
}
if (bottom < thisBottom) {
bottom = thisBottom
}
}
var circleRadius = 20;
var rectAttr = [{
x: top - circleRadius / 2,
y: left - circleRadius / 2,
width: bottom - top + circleRadius,
height: right - left + circleRadius,
}]
d3.select('#invisRect').remove();
svg.selectAll('rectangle')
.data(rectAttr)
.enter() //.append('svg')
.append('rect').attr('id','invisRect')
.attr('x', function(d) {
return d.x;
})
.attr('y', function(d) {
return d.y;
})
.attr('width', function(d) {
return d.width;
})
.attr('height', function(d) {
return d.height;
})
.style('stroke', 'red').style('fill', 'none')
svg.attr('transform',function(d){
var testScale = Math.max(rectAttr[0].width,rectAttr[0].height)
var widthScale = width/testScale
var heightScale = height/testScale
var scale = Math.max(widthScale,heightScale);
var transX = -(parseInt(d3.select('#invisRect').attr("x")) + parseInt(d3.select('#invisRect').attr("width"))/2) *scale + width/2;
var transY = -(parseInt(d3.select('#invisRect').attr("y")) + parseInt(d3.select('#invisRect').attr("height"))/2) *scale + height/2;
return 'translate(' + transX + ','+ transY + ')scale('+scale+')' ;
})
}
&#13;
html {
font: 10px sans-serif;
}
svg {
border: 1px solid silver;
}
.node {
cursor: pointer;
}
.node circle {
stroke: steelblue;
stroke-width: 1.5px;
}
.link {
fill: none;
stroke: lightgray;
stroke-width: 1.5px;
}
&#13;
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.11/d3.min.js"></script>
<div id=tree></div>
&#13;