我希望在带有d3图表的布局中包含直升机视图（或迷你地图视图）。我正在使用 ariutta的svg-pan-zoom ，但缩略图视图的行为并不像预期的那样。经过多次测试，我发现无法获得它。我真的很感激任何建议。
这里有jsfiddle，有我所拥有的简化版本。为了简单起见，已删除了很大一部分代码，并使用了d3noob树形图。我们也使用 dhtmlx ，但这个部分也已经从这个jsfiddle中删除了（可能以后我们可以考虑包含它）：jsfiddle with our code
这是我想要的： enter image description here
为了在缩略图视图中显示图表，d3图表是编码（base64），并用作缩略图视图的背景图像（也作为src尝试）。
可能的原因：
提前致谢！
这是代码的简化版本（不使用dhtmlx）。
HTML代码
<div id="mainScreen" style="height:100%; width:100%; position:absolute;" >
<!-- Original: svg instead of div -->
<!-- <svg id="diagramLayout" style="height:100%;width:100%;position:absolute;">
</svg> -->
<div id="diagramLayout" style="height:100%; width:100%; position:absolute;"></div>
<div id="thumbViewContainer">
<svg id="scopeContainer" class="thumbViewClass">
<g>
<rect id="scope" fill="red" fill-opacity="0.1" stroke="red" stroke-width="2px" x="0" y="0" width="0" height="0"/>
<line id="line1" stroke="red" stroke-width="2px" x1="0" y1="0" x2="0" y2="0"/>
<line id="line2" stroke="red" stroke-width="2px" x1="0" y1="0" x2="0" y2="0"/>
</g>
</svg>
<img id="thumbView" type="image/svg+xml" src="" class="thumbViewClass" />
</div>
</div>
主要JS代码（它需要thumbnailViewer.js和svg-pan-zoom.js，但不包括在这里）
//------ Tree Layout: https://bl.ocks.org/d3noob/43a860bc0024792f8803bba8ca0d5ecd
var treeData =
{
"name": "Top Level",
"children": [
{
"name": "Level 2: A",
"children": [
{ "name": "Son of A" },
{ "name": "Daughter of A" }
]
},
{ "name": "Level 2: B" }
]
};
// Set the dimensions and margins of the diagram
var margin = {top: 20, right: 90, bottom: 30, left: 90},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
// append the svg object to the body of the page
// appends a 'group' element to 'svg'
// moves the 'group' element to the top left margin
var svg = d3.select("#diagramLayout").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 + ")");
var i = 0,
duration = 750,
root;
// declares a tree layout and assigns the size
var treemap = d3.tree().size([height, width]);
// Assigns parent, children, height, depth
root = d3.hierarchy(treeData, function(d) { return d.children; });
root.x0 = height / 2;
root.y0 = 0;
// Collapse after the second level
root.children.forEach(collapse);
update(root);
// Collapse the node and all it's children
function collapse(d) {
if(d.children) {
d._children = d.children
d._children.forEach(collapse)
d.children = null
}
}
function update(source) {
// Assigns the x and y position for the nodes
var treeData = treemap(root);
// Compute the new tree layout.
var nodes = treeData.descendants(),
links = treeData.descendants().slice(1);
// Normalize for fixed-depth.
nodes.forEach(function(d){ d.y = d.depth * 180});
// ****************** Nodes section ***************************
// Update the nodes...
var node = svg.selectAll('g.node')
.data(nodes, function(d) {return d.id || (d.id = ++i); });
// Enter any new modes 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);
// Add Circle for the nodes
nodeEnter.append('circle')
.attr('class', 'node')
.attr('r', 1e-6)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Add labels for the nodes
nodeEnter.append('text')
.attr("dy", ".35em")
.attr("x", function(d) {
return d.children || d._children ? -13 : 13;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) { return d.data.name; });
// UPDATE
var nodeUpdate = nodeEnter.merge(node);
// Transition to the proper position for the node
nodeUpdate.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Update the node attributes and style
nodeUpdate.select('circle.node')
.attr('r', 10)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
})
.attr('cursor', 'pointer');
// Remove any exiting nodes
var nodeExit = node.exit().transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + source.y + "," + source.x + ")";
})
.remove();
// On exit reduce the node circles size to 0
nodeExit.select('circle')
.attr('r', 1e-6);
// On exit reduce the opacity of text labels
nodeExit.select('text')
.style('fill-opacity', 1e-6);
// ****************** links section ***************************
// Update the links...
var link = svg.selectAll('path.link')
.data(links, function(d) { return d.id; });
// Enter any new links at the parent's previous position.
var linkEnter = link.enter().insert('path', "g")
.attr("class", "link")
.attr('d', function(d){
var o = {x: source.x0, y: source.y0}
return diagonal(o, o)
});
// UPDATE
var linkUpdate = linkEnter.merge(link);
// Transition back to the parent element position
linkUpdate.transition()
.duration(duration)
.attr('d', function(d){ return diagonal(d, d.parent) });
// Remove any exiting links
var linkExit = link.exit().transition()
.duration(duration)
.attr('d', function(d) {
var o = {x: source.x, y: source.y}
return diagonal(o, o)
})
.remove();
// Store the old positions for transition.
nodes.forEach(function(d){
d.x0 = d.x;
d.y0 = d.y;
});
// Creates a curved (diagonal) path from parent to the child nodes
function diagonal(s, d) {
path = `M ${s.y} ${s.x}
C ${(s.y + d.y) / 2} ${s.x},
${(s.y + d.y) / 2} ${d.x},
${d.y} ${d.x}`
return path
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
}
// Don't use window.onLoad like this in production, because it can only listen to one function.
function Reset() {
if(panZoom !== undefined){
panZoom.destroy();
}
panZoom = svgPanZoom('#diagramLayout', {
zoomEnabled: true,
dblClickZoomEnabled: false,
fit:true,
controlIconsEnabled: false
});
loadMiniMap();
}
function load() {
panZoom = svgPanZoom('#diagramLayout', {
zoomEnabled: true,
// dblClickZoomEnabled: false,
// fit:true,
// controlIconsEnabled: false
});
loadMiniMap();
}
function loadMiniMap() {
var emebd = document.getElementById("thumbView");
//get svg element.
var svg = document.getElementById("diagramLayout");
//get svg source.
var serializer = new XMLSerializer();
var source = serializer.serializeToString(svg);
var mySVG64 = window.btoa(source);
emebd.style.backgroundImage = "url('data:image/svg+xml;base64," + mySVG64 + "')";
emebd.style.backgroundRepeat = "no-repeat";
emebd.backgroundAttachment = "fixed";
emebd.style.backgroundPosition = "center";
emebd.style.backgroundSize = "contain";
//emebd.src = "data:image/svg+xml;base64, "+ mySVG64
thumbnailViewer({mainViewId: 'diagramLayout',thumbViewId: 'thumbView'});
}
CSS代码
.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 3px;
}
.node text {
font: 12px sans-serif;
}
.link {
fill: none;
stroke: #ccc;
stroke-width: 2px;
}
#mainViewContainer {
width: 95%;
height: 95%;
border: 1px solid black;
margin: 10px;
padding: 3px;
overflow: hidden;
}
#mainView {
width: 100%;
height: 100%;
min-height: 100%;
display: inline;
}
.thumbViewClass {
border: 1px solid black;
position: absolute;
bottom: 12px;
right: 15px;
width: 12%;
height: 15%;
margin: 3px;
padding: 3px;
overflow: hidden;
}
#thumbView {
z-index: 110;
background: white;
}
#scopeContainer {
z-index: 120;
}