Jquery Flot pie charts show data value instead of

问题:

I can't figure out how to get flot.pie to change the data shown in the labels from a percentage of the "raw data" to the actual data. In my example i've created a pie chart with the numbers of read/unread messages.

Number of read messages: 50. Number of unread messages: 150.

The created pie shows the percentage of read messages as 25%. On this spot i want to show the actual 50 messages. See image below:

The code i used to create the pie:

var data = [
    { label: "Read", data: 50, color: '#614E43' },
    { label: "Unread", data: 150, color: '#F5912D' }
];

And:

    $(function () {
        $.plot($("#placeholder"), data,
           {
            series: {
                pie: {
                    show: true,
                    radius: 1,
                    label: {
                        show: true,
                        radius: 2 / 3,
                        formatter: function (label, series) {
                            return '<div style="font-size:8pt;text-align:center;padding:2px;color:white;">' + label + '<br/>' + Math.round(series.percent) + '%</div>';

                        },
                        threshold: 0.1
                    }
                }
            },
            legend: {
                show: false
            }
        });
    });

Is this possible?

With the answer of @Ryley I came to a dirty solution. When I output the series.data the values "1,150" and "1,50" were returned. I came up with the idea to substract the first 2 characters of the returned value and display the substracted value.

String(str).substring(2, str.lenght)

This is the pie chart I created with this solution:

This is not the best solution, but it works for me. if someone knows a better solution....

回答1:

I found the answer to the question. The data object is a multi-dimensional array. To get the acual data use the following code:

    $(function () {
    $.plot($("#placeholder"), data,
       {
        series: {
            pie: {
                show: true,
                radius: 1,
                label: {
                    show: true,
                    radius: 2 / 3,
                    formatter: function (label, series) {
                        return '<div style="font-size:8pt;text-align:center;padding:2px;color:white;">' + label + '<br/>' + series.data[0][1] + '</div>';

                    },
                    threshold: 0.1
                }
            }
        },
        legend: {
            show: false
        }
    });
});

Notice the code " series.data[0][1] " to extract the data.

回答2:

This somewhat depends on what you mean with "On this spot i want to show the actual 50 messages".
Let's assume that you want to have a div popup when they mouseover the Read or Unread section and then show the messages in there.

First step is to make your pie chart interactive. You need to add the grid option like so:

legend: {
    show: true;
},
grid: {
    hoverable: true,
    clickable: true
}

Next, you have to bind the click/hover events to functions that retrieve your messages and display them:

$("#placeholder").bind('plothover',function(e,pos,obj){

});

$("#placeholder").bind('plotclick',function(e,pos,obj){
    if (obj.series.label == 'Read'){
       //show your read messages
    } else {
       //show your unread messages
    }       
});

That's it!

---

Now, if what you meant is simply that you want to display all the messages directly in the pie all the time, you just need to change your formatter to reference a global variable that contains your messages.

回答3:

You could use:

formatter: function (label, series) {
    return '<div style="font-size:8pt;text-align:center;padding:2px;color:white;">'+Math.round(series.percent)+"%<br/>" + series.data[0][1] +'</div>';
},

回答4:

Try something like ProtoVis. There are also a few good answers on SO with links to other free useful data visualization libraries. If you have some $ fusion charts is also quite good.