禁用画笔调整大小（DC.js，D3.js）

本文介绍了禁用画笔调整大小（DC.js，D3.js）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 画笔范围需要从下拉列表中更改为，如下所示： 2）通过点击画笔背景拖动一个新笔刷，其中出现 haircross光标。 JavaScript文件 删除了笔刷的句柄： timeSlider .on（'preRedraw'，function（chart） { var timesliderSVG = d3.select（＃bitrate-timeSlider-chart）。selectAll（g.brush）。selectAll .resize）。selectAll（*）。data（data [0]）。exit（）。remove（）;}） 如果改用css： ＃bitrate-timeSlider-chart g.resize { display：none; visibility：hidden; 现在看起来像这样： 。 resize e，resize w中的rect和路径元素已删除： 但是，resize e 用于扩展刷仍然存在： g.resize.e和g.resize.w的范围为0 * 0： Furthurmore在移除画笔后，在开发人员工具/元素中删除resize e，resize w后，它们重新出现。 尝试删除brushstart，brushes，brushend中的调整大小区域： timeSlider.on ，function（chart）{ var brushg = d3.select（＃bitrate-timeSlider-chart）。selectAll（g.brush）; var resizeg = brushg.selectAll（g.resize）。selectAll（*）。data（data [0]）; var timesliderSVG4 = brushg.on（brushstart，function（）{resizeg.exit（）。remove（）}）on（brush，function（）{resizeg.exit .remove（）}）。on（brushend，function（）{resizeg.exit（）。remove（）}） dc.js文件 尝试更改 setHandlePaths ， resizeHandlePath ： 1） 注释_chart。 setHandlePaths （gBrush） p> _chart.renderBrush = function（g）{.... // _chart.setHandlePaths（gBrush）; ...} 2） strong> setHandlePaths = function（gBrush）例如通过删除 gbrush.path ： // gBrush.selectAll（'。resize path'）。exit（）。remove（）; 3）已备份/已更改_chart。 resizeHandlePath = function（d）{...}。 d3.js文件 1）已更改调整大小，例如： move// mode：resize， var resize = g.selectAll resize）。data（resizes [0]，d3_identity）; 使用resizes [0]禁用背景上的笔刷渲染，但仍然可以重新扩展现有笔刷 2）已备份/已更改 d3_svg_brush大小 3）在d3.svg.brush = function（）中： a） ，none）： background.enter background）。style（visibility，hidden）。style（display，none）。 b） background.exit remove（）; 光标现在是pointer而不是haircross将画笔扩展到全角 strong> c） d3_svg_brushCursor 可使整个画笔消失 4） > pointer-events ： https://jsfiddle.net/gordonwoodhull/272xrsat/9/ Brush extent needs to be changed only from a dropdown as shown here: https://jsfiddle.net/dani2011/67jopfj8/3/Need to disable brush extending by: 1) Extending an existing brush using the handles/resize-area of the brushGray circles are the handels:2) Dragging a new brush by clicking on the brush background, where the haircross cursor appears.JavaScript file Removed the handles of the brush:timeSlider.on('preRedraw',function (chart) { var timesliderSVG = d3.select("#bitrate-timeSlider-chart").selectAll("g.brush").selectAll("g.resize").selectAll("*").data(data[0]).exit().remove();})If using css instead:#bitrate-timeSlider-chart g.resize { display:none; visibility:hidden;Now it looks like this:.The rect and the path elements inside "resize e","resize w" were removed:However,the "resize e", "resize w" for extanding the brush still exist: g.resize.e and g.resize.w dimesions are 0*0:Furthurmore,after deleting "resize e","resize w" in the "developer tools/elements" in chrome,they reappear after moving the brush.Tried to remove the resize-area in brushstart,brush,brushend:timeSlider.on('renderlet', function (chart) {var brushg = d3.select("#bitrate-timeSlider-chart").selectAll("g.brush");var resizeg = brushg.selectAll("g.resize").selectAll("*").data(data[0]); var timesliderSVG4 = brushg.on("brushstart", function () {resizeg.exit().remove()}).on("brush", function () { resizeg.exit().remove() }).on("brushend", function () {resizeg.exit().remove() })dc.js file Tried to change setHandlePaths,resizeHandlePath:1) Remarked the _chart.setHandlePaths(gBrush):_chart.renderBrush = function (g) {.... // _chart.setHandlePaths(gBrush); ...}2) Changed _chart.setHandlePaths = function (gBrush) for example by removing the gbrush.path: // gBrush.selectAll('.resize path').exit().remove();3) Remarked/changed _chart.resizeHandlePath = function (d) {...}.d3.js file1) Remarked/changed resize such as:mode: "move" //mode: "resize" ,var resize = g.selectAll(".resize").data(resizes[0], d3_identity); Using resizes[0] disable the brush rendering on the background but still can re-extend the existing brush2) Remarked/changed d3_svg_brushResizes3) In d3.svg.brush = function():a) Added .style("display","none"):background.enter().append("rect").attr("class", "background").style("visibility", "hidden").style("display", "none").style("cursor", "none");b) background.exit().remove();The cursor now is "pointer" instead of "haircross" extending the brush to a full widthc) d3_svg_brushCursor disabled makes the whole brush disappear4) Changed the pointer-events as specified here: https://developer.mozilla.org/en/docs/Web/CSS/pointer-events5) console.log in different places to track the different brush events:function d3_event_dragSuppress(node) { console.log("here2 "); } if (d3_event_dragSelect) { console.log("here3 d3_event_dragSelect"); ... } return function (suppressClick) { console.log("suppressClick1"); ... var off = function () { console.log("suppressClick2"); ... w.on(click, function () { console.log("suppressClick3") ... function d3_mousePoint(container, e) { console.log("d3_mousePoint1") ... if (svg.createSVGPoint) { console.log("createSVGPoint"); ... if (window.scrollX || window.scrollY) { console.log("createSVGPoint1"); svg = d3.select("body").append("svg").style({ ... function dragstart(id, position, subject, move, end) { console.log("dragstart") ... function moved() { console.log("moved "); console.log("transition1");... if (d3.event.changedTouches) { console.log("brushstart1"); ... } else { console.log("brushstart2"); .. if (dragging) { console.log("dragging4"); .... if (d3.event.keyCode == 32) { if (!dragging) { console.log("notdragging1"); ... function brushmove() { console.log("brushmove"); ... if (!dragging) { console.log("brushmove!dragging"); if (d3.event.altKey) { console.log("brushmove!dragging1"); ... if (resizingX && move1(point, x, 0)) { console.log("resizeXMove1"); ... if (resizingY && move1(point, y, 1)) { console.log("resizeYMove1"); ... if (moved) { console.log("moved"); ... } function move1(point, scale, i) { if (dragging) { console.log("dragging1"); ... if (dragging) { console.log("dragging2"); ... } else { console.log("dragging10"); ... if (extent[0] != min || extent[1] != max) { console.log("dragging11"); if (i) console.log("dragging12"); yExtentDomain = null; console.log("dragging13"); function brushend() { console.log("brushend"); ...The two changes that seemed to get closest to the needed result are in d3.js:1) Using resizes[0] disables the brush rendering on the background but still can re-extend the existing brushvar resize = g.selectAll(".resize").data(resizes[0], d3_identity); 2) Removing the brush's background changes the cursor to "pointer" instead of "haircross",extending the brush to a full width only when clicking on the graph`background.exit().remove();`Any help would be very appreciated! 解决方案 This is from the accepted answer in Disable d3 brush resize, as suggested by @altocumulus. I didn't see a response from @Dani on this idea in particular, but thought I'd go ahead and try it, since I've seen other people try it in the past. (Probably on the dc.js users group.)It looks a little twitchy, because d3.js will draw the brush at the new extent, and then a moment later we reset the extent to what we want, but functionally it seems to do what we want.In dc.js the function that handles brush "rounding" is coordinateGridMixin.extendBrush: _chart.extendBrush = function () { var extent = _brush.extent(); if (_chart.round()) { extent[0] = extent.map(_chart.round())[0]; extent[1] = extent.map(_chart.round())[1]; _g.select('.brush') .call(_brush.extent(extent)); } return extent;};Notice that it's following the same pattern as Lars' answer. Well, this is sort of like rounding, right? Let's override it.First, let's store the current number of hours when it's set through the dropdown:var graphSpan;function addHours(amountHours) { graphSpan = amountHours; // ...Next let's override coordinateGridMixin.extendBrush:timeSlider.extendBrush = function() { var extent = timeSlider.brush().extent(); if(graphSpan) { extent[1] = moment(extent[0]).add(graphSpan, 'hours'); } return extent;}We just replace the function. If we needed to reuse the old implementation in our function, we could use dc.override.If graphSpan has been set, we add that amount to the beginning to get the end. If it's not set, we allow the user to specify the brush width - you'd need to default the graphSpan and the select widget if you wanted that part to work automatically.Well, let's admit it: it's very twitchy, but it works:https://jsfiddle.net/gordonwoodhull/272xrsat/5/EDIT: Got rid of the twitch! The problem was that dc.js was setting the brush extent asynchronously after a little while (in response to the filter event). If we also set it during extentBrush then it never shows the wrong extent:timeSlider.extendBrush = function() { var extent = timeSlider.brush().extent(); if(graphSpan) { extent[1] = moment(extent[0]).add(graphSpan, 'hours'); timeSlider.brush().extent(extent); } return extent;}https://jsfiddle.net/gordonwoodhull/272xrsat/9/ 这篇关于禁用画笔调整大小（DC.js，D3.js）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！