It is a bit of a complicated one.
This is all part of a web application.
The application allows the user to select some parameters, they click
submit and the charts are drawn.
I have two scenarios:
1. I am rendering the charts in a number of tabs using Richfaces
<rich:tabPanel
There is an ontabenter event from which I call my javascript function to
draw the chart
e.g. <rich:tab label="My Tab" ….. ontabenter="createHitRatioChartData();”>
<a4j:jsFunction name="createHitRatioChartData"
oncomplete="drawHitRatioChart(#{behaviourAnalysisToolSession.behaviourChartData.hitRatioString});"
immediate="true">
</a4j:jsFunction>
The <a4j:jsFunction calls the javascript as above.
This working fine and the charts are displayed and I am not using a
callback here.
2. Unfortunately this will not work for the first tab - I want to
load the charts here when the tab is loaded and ontabenter only fires when
the tab is actually clicked on.
So I have been trying to call the same <a4j:jsFunction from my submit
button.
<a4j:commandButton oncomplete="createHitRatioChartData();"
However when I do it this way the charts appear for a moment then disappear.
Any ideas you might have would be great.
Thanks again.
On Monday, 29 June 2015 16:38:58 UTC+1, Daniel LaLiberte wrote:
>
> Hi Aine,
>
> The code you copied isn't showing what you are doing with loading and
> calling your chart drawing function after the ajax call. If you want to
> copy more of your code, or better, point to a page running your code, then
> we can tell what you are doing and what the problems might be.
>
> Generally, loading the visualization library takes some time, and you have
> to use a callback to do the next thing that depends on the visualization
> library. If you are calling google.load() when the page first loads, then
> you can also call google.setOnLoadCallback() to draw your chart. But since
> you also need to wait for the ajax call to finish, you have to wait for two
> things. It's simpler if you can chain things so your callback function is
> called first, at which time you can make your ajax call to get your data
> and then draw the chart.
>
> On Mon, Jun 29, 2015 at 9:02 AM, Aine Mitchell <[email protected]
> <javascript:>> wrote:
>
>> Hi,
>>
>>
>>
>> I am having an issue with my Google charts using an Ajax request to fetch
>> the chart data.
>>
>>
>>
>> Through debugging the code I can see the Javascript function which draws
>> my chart is being called.
>>
>>
>>
>> The issue is the chart appears for a few seconds then disappears.
>>
>>
>>
>> From looking through the forum I am thinking it is some kind of issue
>> with how the Google charts library is loaded.
>>
>>
>>
>> I am loading the library and calling the Javascript function which
>> draws the chart after the Dom has completely loaded.
>>
>>
>>
>> Could you perhaps give me some tips on what is the best way to debug this
>> situation?
>>
>>
>>
>> Any assistance you could give me would be much appreciated.
>>
>>
>> Below is a quick example of my chart script
>>
>>
>>
>> Many thanks.
>>
>> Aine
>>
>>
>>
>> <script type="text/javascript">
>>
>>
>> google.load("visualization", "1",
>> {packages:["corechart","gauge"]});
>>
>> function drawHitRatioChart(dataPoints) {
>>
>> var data = google.visualization.arrayToDataTable([
>> ['Label', 'Value'],
>> ['Hit Ratio', {v: 50, f: ''}]
>> ]);
>>
>> var options = {
>> width: 450, height: 140,
>> redFrom: 0, redTo: dataPoints, redColor:
>> "#C1DAD6",
>> yellowFrom: dataPoints, yellowTo: 100,
>> yellowColor: "#ACD1E9",
>> minorTicks: 10,
>> max: 100
>>
>> };
>>
>> var chart = new
>> google.visualization.Gauge(document.getElementById('hitRatioGraph'));
>>
>> chart.draw(data, options);
>> }
>>
>>
>> }
>>
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>>
>
>
>
> --
> Daniel LaLiberte <https://plus.google.com/100631381223468223275?prsrc=2>
> - 978-394-1058
> [email protected] <javascript:> 5CC, Cambridge MA
> [email protected] <javascript:> 9 Juniper Ridge Road, Acton MA
>
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