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<script type="text/javascript">
function plotDragZoomTree(treeData) {
// $("#theme-drag-zoom-tree").html("");
// Calculate total nodes, max label length
var totalNodes = 0;
var maxLabelLength = 0;
// variables for drag/drop
var selectedNode = null;
var draggingNode = null;
// panning variables
var panSpeed = 200;
var panBoundary = 20; // Within 20px from edges will pan when dragging.
// Misc. variables
var i = 0;
var duration = 750;
var root;
// size of the diagram
var viewerHeight = $(window).height() * 0.80;
var viewerWidth = $(document).width() * 0.80;
var tree = d3.layout.tree()
.size([viewerHeight, viewerWidth]);
// define a d3 diagonal projection for use by the node paths later on.
var diagonal = d3.svg.diagonal()
.projection(function(d) {
return [d.y, d.x];
});
// A recursive helper function for performing some setup by walking through all nodes
function visit(parent, visitFn, childrenFn) {
if (!parent) return;
visitFn(parent);
var children = childrenFn(parent);
if (children) {
var count = children.length;
for (var i = 0; i < count; i++) {
visit(children[i], visitFn, childrenFn);
}
}
}
// Call visit function to establish maxLabelLength
visit(treeData, function(d) {
totalNodes++;
maxLabelLength = Math.max(d.name.length, maxLabelLength);
}, function(d) {
return d.children && d.children.length > 0 ? d.children : null;
});
// sort the tree according to the node names
function sortTree() {
tree.sort(function(a, b) {
return b.name.toLowerCase() < a.name.toLowerCase() ? 1 : -1;
});
}
// Sort the tree initially incase the JSON isn't in a sorted order.
sortTree();
// TODO: Pan function, can be better implemented.
function pan(domNode, direction) {
var speed = panSpeed;
if (panTimer) {
clearTimeout(panTimer);
translateCoords = d3.transform(svgGroup.attr("transform"));
if (direction == 'left' || direction == 'right') {
translateX = direction == 'left' ? translateCoords.translate[0] + speed : translateCoords.translate[0] - speed;
translateY = translateCoords.translate[1];
} else if (direction == 'up' || direction == 'down') {
translateX = translateCoords.translate[0];
translateY = direction == 'up' ? translateCoords.translate[1] + speed : translateCoords.translate[1] - speed;
}
scaleX = translateCoords.scale[0];
scaleY = translateCoords.scale[1];
scale = zoomListener.scale();
svgGroup.transition().attr("transform", "translate(" + translateX + "," + translateY + ")scale(" + scale + ")");
d3.select(domNode).select('g.node').attr("transform", "translate(" + translateX + "," + translateY + ")");
zoomListener.scale(zoomListener.scale());
zoomListener.translate([translateX, translateY]);
panTimer = setTimeout(function() {
pan(domNode, speed, direction);
}, 50);
}
}
// Define the zoom function for the zoomable tree
function zoom() {
svgGroup.attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
// define the zoomListener which calls the zoom function on the "zoom" event constrained within the scaleExtents
var zoomListener = d3.behavior.zoom().scaleExtent([0.1, 3]).on("zoom", zoom);
// function initiateDrag(d, domNode) {
// draggingNode = d;
// d3.select(domNode).select('.ghostCircle').attr('pointer-events', 'none');
// d3.selectAll('.ghostCircle').attr('class', 'ghostCircle show');
// d3.select(domNode).attr('class', 'node activeDrag');
// svgGroup.selectAll("g.node").sort(function(a, b) { // select the parent and sort the path's
// if (a.id != draggingNode.id) return 1; // a is not the hovered element, send "a" to the back
// else return -1; // a is the hovered element, bring "a" to the front
// });
// // if nodes has children, remove the links and nodes
// if (nodes.length > 1) {
// // remove link paths
// links = tree.links(nodes);
// nodePaths = svgGroup.selectAll("path.link")
// .data(links, function(d) {
// return d.target.id;
// }).remove();
// // remove child nodes
// nodesExit = svgGroup.selectAll("g.node")
// .data(nodes, function(d) {
// return d.id;
// }).filter(function(d, i) {
// if (d.id == draggingNode.id) {
// return false;
// }
// return true;
// }).remove();
// }
// // remove parent link
// parentLink = tree.links(tree.nodes(draggingNode.parent));
// svgGroup.selectAll('path.link').filter(function(d, i) {
// if (d.target.id == draggingNode.id) {
// return true;
// }
// return false;
// }).remove();
// dragStarted = null;
// }
// define the baseSvg, attaching a class for styling and the zoomListener
var baseSvg = d3.select("#theme-drag-zoom-tree").append("svg")
.attr("width", viewerWidth)
.attr("height", viewerHeight)
.attr("class", "overlay")
.call(zoomListener);
// // Define the drag listeners for drag/drop behaviour of nodes.
// dragListener = d3.behavior.drag()
// .on("dragstart", function(d) {
// if (d == root) {
// return;
// }
// dragStarted = true;
// nodes = tree.nodes(d);
// d3.event.sourceEvent.stopPropagation();
// // it's important that we suppress the mouseover event on the node being dragged. Otherwise it will absorb the mouseover event and the underlying node will not detect it d3.select(this).attr('pointer-events', 'none');
// })
// .on("drag", function(d) {
// if (d == root) {
// return;
// }
// if (dragStarted) {
// domNode = this;
// initiateDrag(d, domNode);
// }
// // get coords of mouseEvent relative to svg container to allow for panning
// relCoords = d3.mouse($('svg').get(0));
// if (relCoords[0] < panBoundary) {
// panTimer = true;
// pan(this, 'left');
// } else if (relCoords[0] > ($('svg').width() - panBoundary)) {
// panTimer = true;
// pan(this, 'right');
// } else if (relCoords[1] < panBoundary) {
// panTimer = true;
// pan(this, 'up');
// } else if (relCoords[1] > ($('svg').height() - panBoundary)) {
// panTimer = true;
// pan(this, 'down');
// } else {
// try {
// clearTimeout(panTimer);
// } catch (e) {
// }
// }
// d.x0 += d3.event.dy;
// d.y0 += d3.event.dx;
// var node = d3.select(this);
// node.attr("transform", "translate(" + d.y0 + "," + d.x0 + ")");
// // updateTempConnector();
// })
// .on("dragend", function(d) {
// if (d == root) {
// return;
// }
// domNode = this;
// if (selectedNode) {
// // now remove the element from the parent, and insert it into the new elements children
// var index = draggingNode.parent.children.indexOf(draggingNode);
// if (index > -1) {
// draggingNode.parent.children.splice(index, 1);
// }
// if (typeof selectedNode.children !== 'undefined' || typeof selectedNode._children !== 'undefined') {
// if (typeof selectedNode.children !== 'undefined') {
// selectedNode.children.push(draggingNode);
// } else {
// selectedNode._children.push(draggingNode);
// }
// } else {
// selectedNode.children = [];
// selectedNode.children.push(draggingNode);
// }
// // Make sure that the node being added to is expanded so user can see added node is correctly moved
// expand(selectedNode);
// sortTree();
// endDrag();
// } else {
// endDrag();
// }
// });
// function endDrag() {
// selectedNode = null;
// d3.selectAll('.ghostCircle').attr('class', 'ghostCircle');
// d3.select(domNode).attr('class', 'node');
// // now restore the mouseover event or we won't be able to drag a 2nd time
// d3.select(domNode).select('.ghostCircle').attr('pointer-events', '');
// updateTempConnector();
// if (draggingNode !== null) {
// update(root);
// centerNode(draggingNode);
// draggingNode = null;
// }
// }
// Helper functions for collapsing and expanding nodes.
function collapse(d) {
if (d.children) {
d._children = d.children;
d._children.forEach(collapse);
d.children = null;
}
}
function expand(d) {
if (d._children) {
d.children = d._children;
d.children.forEach(expand);
d._children = null;
}
}
function getHierarchyIds(d) {
hierarchyIdsArr = [d.id];
while(d.parent)
{
hierarchyIdsArr.push(d.parent.id);
d = d.parent;
}
// currently treeData doesn't hold top-theme _id,
// so by default it's 1 in that place. Replace 1 with top theme's _id:
hierarchyIdsArr.pop(hierarchyIdsArr.indexOf(1));
// hierarchyIdsArr.push("{{node.pk}}");
hierarchyIdsArr.reverse();
// console.log(hierarchyIdsArr)
return hierarchyIdsArr
}
var overCircle = function(d) {
selectedNode = d;
updateTempConnector();
};
var outCircle = function(d) {
selectedNode = null;
updateTempConnector();
};
// Function to update the temporary connector indicating dragging affiliation
var updateTempConnector = function() {
var data = [];
if (draggingNode !== null && selectedNode !== null) {
// have to flip the source coordinates since we did this for the existing connectors on the original tree
data = [{
source: {
x: selectedNode.y0,
y: selectedNode.x0
},
target: {
x: draggingNode.y0,
y: draggingNode.x0
}
}];
}
var link = svgGroup.selectAll(".templink").data(data);
link.enter().append("path")
.attr("class", "templink")
.attr("d", d3.svg.diagonal())
.attr('pointer-events', 'none');
link.attr("d", d3.svg.diagonal());
link.exit().remove();
};
// Function to center node when clicked/dropped so node doesn't get lost when collapsing/moving with large amount of children.
function centerNode(source) {
scale = zoomListener.scale();
x = -source.y0;
y = -source.x0;
x = x * scale + viewerWidth / 4;
y = y * scale + viewerHeight / 2;
d3.select('#theme-drag-zoom-tree g').transition()
.duration(duration)
.attr("transform", "translate(" + x + "," + y + ")scale(" + scale + ")");
zoomListener.scale(scale);
zoomListener.translate([x, y]);
}
// Toggle children function
function toggleChildren(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else if (d._children) {
d.children = d._children;
d._children = null;
}
return d;
}
// Toggle children on click.
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
console.log("non-leaf 1");
}
else {
if(d._children){
d.children = d._children;
d._children = null;
console.log("non-leaf 2");
}
else if (d.node_type == "Topic"){
console.log("Leaf!");
hierarchyIdsArr = getHierarchyIds(d);
// alert("dddddd");
// var a = document.createElement('a');
// a.setAttribute('href', "/{{group_name_tag}}/topic_details/"+d.id+"");
// // a.setAttribute('target', '_blank');
// document.body.appendChild(a);
// a.click();
// a.remove();
location.href = "/{{group_name_tag}}/topic_details/" + d.id +
"?nav_li=" + hierarchyIdsArr.toString() + "";
// location.href = "/{{group_name_tag}}/topic_details/"+d.id+"";
// $('#collaps_topic_details').foundation('reveal', 'open');
}
}
update(d);
}
// function click(d) {
// if (d3.event.defaultPrevented) return; // click suppressed
// d = toggleChildren(d);
// update(d);
// centerNode(d);
// }
function update(source) {
// Compute the new height, function counts total children of root node and sets tree height accordingly.
// This prevents the layout looking squashed when new nodes are made visible or looking sparse when nodes are removed
// This makes the layout more consistent.
var levelWidth = [1];
var childCount = function(level, n) {
if (n.children && n.children.length > 0) {
if (levelWidth.length <= level + 1) levelWidth.push(0);
levelWidth[level + 1] += n.children.length;
n.children.forEach(function(d) {
childCount(level + 1, d);
});
}
};
childCount(0, root);
var newHeight = d3.max(levelWidth) * 25; // 25 pixels per line
tree = tree.size([newHeight, viewerWidth]);
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse(),
links = tree.links(nodes);
// Set widths between levels based on maxLabelLength.
nodes.forEach(function(d) {
d.y = (d.depth * (maxLabelLength * 5)); //maxLabelLength * 10px
// alternatively to keep a fixed scale one can set a fixed depth per level
// Normalize for fixed-depth by commenting out below line
// d.y = (d.depth * 500); //500px per level.
});
// Update the nodes…
node = svgGroup.selectAll("#theme-drag-zoom-tree 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")
// .call(dragListener)
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + source.y0 + "," + source.x0 + ")";
})
.attr("data-coll-node-id", function(d) {return d.id || (d.id = ++i); })
.style("cursor", "pointer")
.on('click', click);
nodeEnter.append("circle")
.attr('class', 'nodeCircle')
.attr("r", 0)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
})
.style("stroke-width", "1.5px")
.style("stroke", "steelblue");
nodeEnter.append("text")
.attr("x", function(d) {
return d.children || d._children ? -10 : 10;
})
.attr("dy", ".35em")
.attr('class', 'nodeText')
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
})
.style("fill-opacity", 0)
.style("font-family", "sans-serif")
.style("font-size", "10px");
// phantom node to give us mouseover in a radius around it
// nodeEnter.append("circle")
// .attr('class', 'ghostCircle')
// .attr("r", 30)
// .attr("opacity", 0.2) // change this to zero to hide the target area
// // .style("fill", "red")
// .attr('pointer-events', 'mouseover')
// .on("mouseover", function(node) {
// overCircle(node);
// })
// .on("mouseout", function(node) {
// outCircle(node);
// });
// Update the text to reflect whether node has children or not.
node.select('text')
.attr("x", function(d) {
return d.children || d._children ? -10 : 10;
})
.attr("text-anchor", function(d) {
return d.children || d._children ? "end" : "start";
})
.text(function(d) {
return d.name;
});
// Change the circle fill depending on whether it has children and is collapsed
node.select("circle.nodeCircle")
.attr("r", 4.5)
.style("fill", function(d) {
return d._children ? "lightsteelblue" : "#fff";
});
// Transition nodes to their new position.
var nodeUpdate = node.transition()
.duration(duration)
.attr("transform", function(d) {
return "translate(" + d.y + "," + d.x + ")";
});
// Fade the text in
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 = svgGroup.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
});
})
.style("stroke", "#ccc")
.style("stroke-width", "1.5px")
.style("fill", "none");
// 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;
});
}
// Append a group which holds all nodes and which the zoom Listener can act upon.
svgGroup = baseSvg.append("g");
// Define the root
root = treeData;
aaa = root;
root.x0 = viewerHeight / 2;
root.y0 = 0;
// Layout the tree initially and center on the root node.
// getData(root);
root.children.forEach(collapse);
update(root);
centerNode(root);
// recursive function needed to get data for {{selected}} node
// result = ""
// function getData (d) {
// console.log("{{selected}} : " + d.name + " : " + d.id);
// if(d.id == "{{selected}}")
// {
// console.log("======================================================");
// result = d
// }
// if(d.children)
// {
// console.log(d.children)
// d.children.forEach(function(i){
// res = getData(i);
// if (res)
// {
// return res
// }
// })
// }
// else if(d._children)
// {
// console.log(d._children)
// d._children.forEach(function(i){
// res = getData(i);
// if (res)
// {
// return res
// }
// })
// }
// }
// console.log(getData(root))
}
// alert("{{selected}}");
//called with every property and it's value
// selected = document.querySelector('[data-coll-node-id="{{selected}}"]');
// selectedNodeData = d3.select(selected).data();
// d = selectedNodeData[0];
// hierarchyIdsArr = getHierarchyIds(d);
// console.log(hierarchyIdsArr);
// while(d && d.parent)
// {
// console.log("11")
// click(d)
// d = d.parent;
// }
// function expandHierarchy(d) {
// console.log(d)
// }
// expandHierarchy(selectedNodeData[0]);
function downloadCollapsibleGraph(filename)
{
var blob = new Blob([$("#theme-drag-zoom-tree").html()], {type: "image/svg+xml"});
filename = filename.replace(/\ /g, '-');
filename += "-Collapsible-Graph.svg";
saveAs(blob, filename);
}
</script>
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