mpandroidchart - 如何避免在Y轴的重复值？ [英] mpandroidchart - How can I avoid the repeated values in Y-Axis?

问题描述

我想避免的重复值和Y轴的-0值，避免了图像的情况。

I want to avoid the repeated values and the -0 values in Y-Axis, avoiding the image situation.

我的这些想法解决这个问题，但任何解决方案：

I have these ideas to solve this, but any solution:

1. 具有Y轴重复的值之前限制变焦，因此停止无限放大，在图表上
2. 获取的Y轴值并删除重复值。

1. Limit the zoom before having repeated values in YAxis, therefore stop the infinite zoom-in on the chart
2. Get the YAxis values and remove the duplicate values.

推荐答案

TL;博士的您可以通过更改标签计数 onChartScale 。

tl;dr You can do this by changing the label count in onChartScale.

首先，你希望你的听众设置：

First, you want your listener set up:

chart.setOnChartGestureListener(this); // set a listener ;)

您尝试获得顶部/底部抽出的价值观和检查什么被绘制在屏幕上。应用一些基本的计算，你设置。

You try to get the top/bottom drawn values and check what gets drawn on the screen. Apply some basic calculations, and you're set.

下面code将利用2个标签，如果缩放水平得到（太）高以及多达9个，否则：

The following code will draw 2 labels if the zoom level gets (too) high and up to 9 otherwise:

@Override
public void onChartScale(MotionEvent me, float scaleX, float scaleY) {
    final YAxis yAxis = mChart.getAxisLeft();
    final Transformer transformer = mChart.getTransformer(YAxis.AxisDependency.LEFT);

    // ...minor dirty hack
    final PointD top = transformer.getValuesByTouchPoint(0, 0);
    final PointD bottom = transformer.getValuesByTouchPoint(0, mChart.getHeight());
    final int diff = (int)(top.y - bottom.y);

    // draw 2-9 axis labels
    final int count = Math.min(9, Math.max(diff, 2));

    Log.d("scale", String.format("scale %f: diff %d and count %d", scaleY, diff, count));

    // "force" the count, for there are drawing issues where none get drawn on high zoom levels (just try it out)
    yAxis.setLabelCount(count, true);
}

// todo implement other interface methods

价值格式化和其他一切保持不变。

The value formatter and everything else stays the same.

和一些丑陋的截图显示，它的工作原理：D

And some ugly screenshot to show that it works :D

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