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    Success! Looks like we've fixed this one. According to our records the fix was applied for EXTJS-4757 in a recent build.
  1. #1
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    Default Setting a chart time axis to have a grid can cause errors with certain step/start val

    Setting a chart time axis to have a grid can cause errors with certain step/start val


    REQUIRED INFORMATION


    Ext version tested:
    • Ext 4.0.7
    • Ext 4.1-pr1
    Description:
    • Setting a chart time axis to have a grid can cause errors with certain step/start values.
    Steps to reproduce the problem:
    • 4.0.7: src/draw/Draw.js Line 1080:
    Code:
    case Ext.Date.DAY:
    testFrom = new Date(fromStat[0], fromStat[1],
    Math.floor(fromStat[2] - 1 / step[1]) * step[1] + 1, 0, 0, 0, 0);
    break;
    Input:
    Code:
    var fromStat = [2011, 10, 23, 0, 0, 0, 0]; // Wed Nov 23 2011 01:00:00 GMT+0100 (CET)
    var step = [Ext.Date.DAY, 10]; // put grid marker/line every 10 days
    Problematic part:
    Code:
    Math.floor(fromStat[2] - 1 / step[1]) * step[1]+1; // 23 - 1 / 10 = 22.9 -> floor = 22 -> 22 * 10 + 1 = 221
    Possible fix:

    Code:
    Math.floor((fromStat[2] - 1) / step[1]) * step[1]+1; // (23 - 1) / 10 = 2.2 -> floor = 2 -> 2 * 10 +1 = 21
    But i'm not sure what exactly this is supposed to accomplish. I just know that a value like 221 does NOT work.


    Btw: Steps in the same function is used multiple times for division. If steps === 0, you get 123/0 === Infinity, causing other systems that don't handle this case to fail. Ultimately ending in error messages like "undefined has no method 'substring'".
    Last edited by mAritz; 14 Dec 2011 at 1:29 AM. Reason: Comments in code examples/fix were wrong

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