The following example shows how you can adjust the interval of horizontal grid lines in a LineChart by setting the horizontalChangeCount style.
Full code after the jump.
<?xml version="1.0"?>
<!-- http://blog.flexexamples.com/2007/11/15/changing-the-horizontal-grid-line-frequency-in-a-flex-linechart-control-using-the-horizontalchangecount-style/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:XMLListCollection id="dp">
<mx:source>
<mx:XMLList>
<quote date="8/27/2007" open="40.38" close="40.81" />
<quote date="8/24/2007" open="40.5" close="40.41" />
<quote date="8/23/2007" open="40.82" close="40.6" />
<quote date="8/22/2007" open="40.4" close="40.77" />
<quote date="8/21/2007" open="40.41" close="40.13" />
<quote date="8/20/2007" open="40.55" close="40.74" />
<quote date="8/17/2007" open="40.18" close="40.32" />
<quote date="8/16/2007" open="39.83" close="39.96" />
<quote date="8/15/2007" open="40.22" close="40.18" />
<quote date="8/14/2007" open="41.01" close="40.41" />
<quote date="8/13/2007" open="41" close="40.83" />
<quote date="8/10/2007" open="41.3" close="41.06" />
<quote date="8/9/2007" open="39.9" close="40.75" />
<quote date="8/8/2007" open="39.61" close="40.23" />
<quote date="8/7/2007" open="39.08" close="39.42" />
<quote date="8/6/2007" open="38.71" close="39.38" />
<quote date="8/3/2007" open="39.47" close="38.75" />
<quote date="8/2/2007" open="39.4" close="39.52" />
<quote date="8/1/2007" open="40.29" close="39.58" />
</mx:XMLList>
</mx:source>
</mx:XMLListCollection>
<mx:ApplicationControlBar dock="true">
<mx:Label text="horizontalChangeCount:" />
<mx:HSlider id="slider"
minimum="1"
maximum="5"
liveDragging="true"
snapInterval="1" />
<mx:Spacer width="100%" />
<mx:Legend dataProvider="{lineChart}"
direction="horizontal" />
</mx:ApplicationControlBar>
<mx:LineChart id="lineChart"
showDataTips="true"
dataProvider="{dp}"
width="100%"
height="100%">
<mx:backgroundElements>
<mx:GridLines direction="horizontal"
horizontalChangeCount="{slider.value}">
<mx:horizontalStroke>
<mx:Stroke color="black" weight="0" alpha="0.2" />
</mx:horizontalStroke>
</mx:GridLines>
</mx:backgroundElements>
<!-- vertical axis -->
<mx:verticalAxis>
<mx:LinearAxis baseAtZero="false" title="Price" />
</mx:verticalAxis>
<!-- horizontal axis -->
<mx:horizontalAxis>
<mx:CategoryAxis id="ca" categoryField="@date" title="Date" />
</mx:horizontalAxis>
<!-- horizontal axis renderer -->
<mx:horizontalAxisRenderers>
<mx:AxisRenderer axis="{ca}" canDropLabels="true" />
</mx:horizontalAxisRenderers>
<!-- series -->
<mx:series>
<mx:LineSeries yField="@open" displayName="Open" />
</mx:series>
</mx:LineChart>
</mx:Application>
View source is enabled in the following example.
You can also change the horizontalChangeCount style using CSS, similar to the following snippet:
<mx:Style>
GridLines {
horizontalChangeCount: 2;
}
</mx:Style>
Or you can change the horizontalChangeCount style using ActionScript, using the setStyle() method, similar to the following snippet:
myGridLines.setStyle("horizontalChangeCount", 2);
If you want to alternate background row colors in the LineChart, simply set the horizontalAlternateFill style, as seen in the following example:
<?xml version="1.0"?>
<!-- http://blog.flexexamples.com/2007/11/15/changing-the-horizontal-grid-line-frequency-in-a-flex-linechart-control-using-the-horizontalchangecount-style/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:Style>
GridLines {
horizontalChangeCount: 3;
horizontalAlternateFill: white;
}
</mx:Style>
<mx:XMLListCollection id="dp">
<mx:source>
<mx:XMLList>
<quote date="8/27/2007" open="40.38" close="40.81" />
<quote date="8/24/2007" open="40.5" close="40.41" />
<quote date="8/23/2007" open="40.82" close="40.6" />
<quote date="8/22/2007" open="40.4" close="40.77" />
<quote date="8/21/2007" open="40.41" close="40.13" />
<quote date="8/20/2007" open="40.55" close="40.74" />
<quote date="8/17/2007" open="40.18" close="40.32" />
<quote date="8/16/2007" open="39.83" close="39.96" />
<quote date="8/15/2007" open="40.22" close="40.18" />
<quote date="8/14/2007" open="41.01" close="40.41" />
<quote date="8/13/2007" open="41" close="40.83" />
<quote date="8/10/2007" open="41.3" close="41.06" />
<quote date="8/9/2007" open="39.9" close="40.75" />
<quote date="8/8/2007" open="39.61" close="40.23" />
<quote date="8/7/2007" open="39.08" close="39.42" />
<quote date="8/6/2007" open="38.71" close="39.38" />
<quote date="8/3/2007" open="39.47" close="38.75" />
<quote date="8/2/2007" open="39.4" close="39.52" />
<quote date="8/1/2007" open="40.29" close="39.58" />
</mx:XMLList>
</mx:source>
</mx:XMLListCollection>
<mx:ApplicationControlBar dock="true">
<mx:Label text="horizontalChangeCount:" />
<mx:HSlider id="slider"
minimum="1"
maximum="5"
liveDragging="true"
snapInterval="1" />
<mx:Spacer width="100%" />
<mx:Legend dataProvider="{lineChart}"
direction="horizontal" />
</mx:ApplicationControlBar>
<mx:LineChart id="lineChart"
showDataTips="true"
dataProvider="{dp}"
width="100%"
height="100%">
<mx:backgroundElements>
<mx:GridLines direction="horizontal"
horizontalChangeCount="{slider.value}">
<mx:horizontalStroke>
<mx:Stroke color="black" weight="0" alpha="0.2" />
</mx:horizontalStroke>
</mx:GridLines>
</mx:backgroundElements>
<!-- vertical axis -->
<mx:verticalAxis>
<mx:LinearAxis baseAtZero="false" title="Price" />
</mx:verticalAxis>
<!-- horizontal axis -->
<mx:horizontalAxis>
<mx:CategoryAxis id="ca" categoryField="@date" title="Date" />
</mx:horizontalAxis>
<!-- horizontal axis renderer -->
<mx:horizontalAxisRenderers>
<mx:AxisRenderer axis="{ca}" canDropLabels="true" />
</mx:horizontalAxisRenderers>
<!-- series -->
<mx:series>
<mx:LineSeries yField="@open" displayName="Open" />
</mx:series>
</mx:LineChart>
</mx:Application>
View source is enabled in the following example.
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