The following example shows how you can change the line colors in a LineChart in Flex by setting the lineStroke style in MXML or ActionScript, as seen in the following snippets:
MXML:
<mx:LineSeries id="closeSeries" yField="@close" form="curve" displayName="Close">
<mx:lineStroke>
<mx:Stroke color="haloGreen" weight="2" alpha="0.6" />
</mx:lineStroke>
</mx:LineSeries>
ActionScript:
<mx:LineSeries id="closeSeries" yField="@close" form="curve" displayName="Close" />
...
closeSeries.setStyle("lineStroke", new Stroke(0xFF0000, 2, 0.4));
Full code after the jump.
<?xml version="1.0"?>
<!-- http://blog.flexexamples.com/2007/11/13/changing-default-line-colors-in-a-flex-linechart-control/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:Script>
<![CDATA[
import mx.styles.StyleManager;
]]>
</mx:Script>
<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:Button label="0xFF0000" click="closeSeries.setStyle('lineStroke', new Stroke(0xFF0000, 2, 0.4));" />
<mx:Button label="0xFF00FF" click="closeSeries.setStyle('lineStroke', new Stroke(0xFF00FF, 2, 1.0));" />
<mx:Button label="haloSilver" click="closeSeries.setStyle('lineStroke', new Stroke(StyleManager.getColorName('haloSilver'), 2, 1.0));" />
<mx:Spacer width="100%" />
<mx:Legend dataProvider="{lineChart}" />
</mx:ApplicationControlBar>
<mx:LineChart id="lineChart"
showDataTips="true"
dataProvider="{dp}"
width="100%"
height="100%">
<!-- series filters -->
<mx:seriesFilters>
<mx:Array />
</mx:seriesFilters>
<!-- 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 id="closeSeries" yField="@close" form="curve" displayName="Close">
<mx:lineStroke>
<mx:Stroke color="haloGreen" weight="2" alpha="0.6" />
</mx:lineStroke>
</mx:LineSeries>
<mx:LineSeries yField="@open" form="curve" displayName="Open">
<mx:lineStroke>
<mx:Stroke color="haloOrange" weight="2" alpha="0.6" />
</mx:lineStroke>
</mx:LineSeries>
</mx:series>
</mx:LineChart>
</mx:Application>
View source is enabled in the following example.
When setting a stroke in ActionScript, note that you must pass the stroke color as a numeric value (like 0xFF0000), not as a color name (like “red”):
closeSeries.setStyle("lineStroke", new Stroke(0xFF0000, 2, 0.4));
If you want to use a named color, you can use the static StyleManager.getColorName() method, as shown in the following snippet:
closeSeries.setStyle("lineStroke", new Stroke(StyleManager.getColorName("red"), 2, 1.0));
{ 4 comments… read them below or add one }
Thank You!!
How do you do this using CSS? I have a bar chart and a line chart, and using the fill style, can change the bar chart columns, but not the line chart colours, like:
.line0 {
fill: #fad31e;
}
And creating the lineseries dynamically, using:
ls = new LineSeries();
ls.id = "Series" + i;
ls.displayName = currentLabels[i];
ls.dataProvider = currentChartData[i];
ls.xField = "year";
ls.yField = "value";
ls.styleName = ".line" + i;
But the fill doesn’t seem to do anything. How do you set a stroke in CSS?
you can define stroke with css, but can’t initiate a stroke object in css.
= can’t use css in this case because lineseries is expecting a stroke object
for a columnchart you can use:
ColumnChart{
chartSeriesStyles: Series1, Series2, Series3, Series4, Series5;
}
.Series1 {fill: #XXXXX;}
.Series2 {fill: #SSSSS;}
…
but for a linechart you will have to use a work around like a loop in an array of color:uint
How do I do this using actionScript 3 for barchart.
Help me please.