hiding year on date format

TeeChart for Javascript for the HTML5 Canvas
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goodsj
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Posts: 4
Joined: Thu Jan 25, 2018 12:00 am

hiding year on date format

Post by goodsj » Fri Nov 23, 2018 2:24 am

before.jpg
before.jpg (12.62 KiB) Viewed 226 times
current date format is show years (yyyy - mm - dd hh:ii:ss)


I wish to fix it like following pictures.

1 . Year format is displayed only first time or when next year
after.jpg
after.jpg (11.2 KiB) Viewed 226 times

How to fix it like this picture?

Yeray
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Posts: 8558
Joined: Tue Dec 05, 2006 12:00 am
Location: Girona, Catalonia
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Re: hiding year on date format

Post by Yeray » Fri Nov 23, 2018 3:02 pm

Hello,

Find below a simple example:
chrome_2018-11-23_16-03-22.png
chrome_2018-11-23_16-03-22.png (84.02 KiB) Viewed 221 times

Code: Select all

      var Chart1;

      function draw() {
        Chart1 = new Tee.Chart("canvas1");

        Chart1.legend.visible = false;
        Chart1.axes.bottom.labels.dateFormat = "yyyy-mm-dd hh:MM:ss";

        var drawingLabels = false;
        var yearsDrawn;
        Chart1.axes.bottom.oldDrawLabels = Chart1.axes.bottom.drawLabels;
        Chart1.axes.bottom.drawLabels = function(){
          drawingLabels = true;
          yearsDrawn = [];
          this.oldDrawLabels();
          drawingLabels = false;
          console.log(yearsDrawn);
        }

        Chart1.axes.bottom.labels.ongetlabel = function(value, text) {
          if (drawingLabels) {
            console.log(text);
            var year = text.substr(0, 4);
            if (yearsDrawn.indexOf(year) === -1) {
              yearsDrawn.push(year);
            }
            else {
              text = text.substr(5);
            }
          }

          return text;
        }

        var series1 = Chart1.addSeries(new Tee.Line()).addRandom(500);

        var msecsInADay=86400000; //24*60*60*1000
        series1.data.x=new Array(series1.count());
        var now=new Date();
        for (var t=0; t<series1.count(); t++) {
          series1.data.x[t] = new Date(now.getTime() + t * msecsInADay);
        }

        Chart1.draw();
      }
Best Regards,
ImageYeray Alonso
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