为样式d3的工具提示 [英] Styling d3´s tooltip

问题描述

我在这样的leafletmap上通过d3实现一个工具提示：

I implement a tooltip over circles placed through d3 on a leafletmap like this:

var tooltip = d3.select("body")
    .append("div")
    .attr("id", "mytooltip")
    .style("position", "absolute")
    .style("z-index", "10")
    .style("visibility", "hidden")
    .text("a simple tooltip");



feature.on("mouseover",function(d) { 
    d3.select(this)
    .transition()
    .ease("elastic")
    .duration(500)
    .attr('r', function (d){ 
        return (d.properties.xy * 5)
        .style("stroke", "black")
        d3.select("#mytooltip")
            .style("visibility", "visible")
            .text(d.properties.xy1 + " " + d.properties.xy2)
    });

feature.on("mousemove", function() {
    return tooltip.style("top", (d3.event.pageY-10)+"px")
    .style("left",(d3.event.pageX+10)+"px");

    });

feature.on("mouseout",function(d) { 
    d3.select(this)
    .transition()
    .ease("elastic")
    .duration(500)
    .attr('r', function (d){ 
            return (d.properties.xy);
        })
        .style("stroke", "none")
        d3.select("#mytooltip")
            .style("visibility", "hidden")
    });

我的功能是这样的：

var feature = g.selectAll("circle")
      .data(myData.features)
      .enter()
      //...

我不知道如何设置显示的工具提示样式？有没有办法给它一个背景，写一些粗体，斜体，不同的颜色等等？

I wonder how I can style the tooltip that shows up? Is there a way to give it a background, write something in bold, italic, different colors etc?

推荐答案

喜欢做。首先，我设置工具提示的CSS样式，使用一个名为tooltip的类的div：

This is what I like to do. First, I set the CSS style for the tooltip, using a div with a class named "tooltip":

    div.tooltip {   
        position: /*whatever*/;         
        text-align: /*whatever*/;           
        white-space: /*whatever*/;                  
        padding: /*whatever*/;              
        font-size: /*whatever*/;        
        background: /*whatever*/;   
        border: /*whatever*/;   
        border-radius: /*whatever*/;            
        pointer-events: /*whatever*/;
        etc...          
    }

然后我设置一个工具提示var ，#svgId是您添加svg的元素的ID，与选择body时没有太大区别）：

Then I set a tooltip var (here, #svgId is the Id of the element where you append your svg, not much different of selecting "body" as you did):

var tooltip = d3.select("#svgId").append("div") 
                .attr("class", "tooltip")               
                .style("opacity", 0);

div有0个不透明度。然后它只是一个问题在鼠标悬停或mousemove显示工具提示。我喜欢mousemove：

The div has 0 opacity. Then it's just a matter of showing the tooltip on mouseover or mousemove. I like mousemove:

feature.on("mousemove", function(d) {
                tooltip.html("<strong> Look, I'm bold !</strong> and now I'm 
                        not bold <br> and this is another line! and this
                        is my data:" + d.whatever)
                        .style('top', d3.event.pageY - 12 + 'px')
                        .style('left', d3.event.pageX + 25 + 'px')
                        .style("opacity", 1);
            });

您可以使用HTML标签为工具提示中的文本设置样式，使其粗体，斜体等。 ，最后，我们使鼠标移出时的工具提示消失（如你所做）：

You can use HTML tags to style your text inside the tooltip, making it bold, italic etc. And, finally, we make the tooltip disappear on mouseout (as you did):

feature.on("mouseout", function(d) {
                tooltip.style("opacity", 0);
            });

这篇关于为样式d3的工具提示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IT屋！