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Defining label position on x-axis

LabPusher

Hi,

in my chart, I want to define the interval of the labels shown on the x-axis.
I can do this by choosing interval = 3 very simple.
Now the 1. label, the 4. label are displayed and so on.

How can I change this to be shown the 3. , 6. ... ?

Since there is no option in the GUI, I think it has to be done by a script ?

Thx a lot

Axel

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mwilliams

Hi Axel, 
 
Try this: 
 
<pre class='_prettyXprint _lang-auto _linenums:0'>
i=1;
function beforeDrawAxisLabel( axis, label, icsc )
{
if (axis.isCategoryAxis()){
if (i%3 == 0){
label.setVisible(true);
}
else{
label.setVisible(false);
}
i++;
}
}
</pre>

LabPusher

very nice !

Does this have effect on all charts of my report ?
Shouldn't I reduce the script on one special chart ? By any restrictions in the script ?

I just tried out, it changed the behaviour of reporting, but till now I didn't get the desired result.

Have a nice day !

mwilliams

This code should only change the chart that you put it in. Is this not what you're seeing?

LabPusher

<blockquote class='ipsBlockquote' data-author="'mwilliams'" data-cid="77300" data-time="1305899385" data-date="20 May 2011 - 06:49 AM">
This code should only change the chart that you put it in. Is this not what you're seeing? </blockquote>
Hi, 
 
I put the script on the main level, belonging to the report. 
 
As I understand you, it has to be put directly to the chart. 
I expected the place to put the script in, should be : 
Format chart -> chart area -> X-axis 
 
but I couldn't find any position to integrate it properly :wacko: 
 
HAND

mwilliams

The script above should just go in the onRender script of the chart. Let me know if you have any questions!

LabPusher

hi,

I am using Birt Report Designer with Birt 2.3.1
And I don't see an "onRender"-option belonging to the chart.

I just can add a (onRender-)script to the whole report.

Does it depend on the (birt) version ?

HAND

mwilliams

In the designer, if you click on your chart and then select the script tab under the design window, you'll see the onRender method there.

LabPusher

<blockquote class='ipsBlockquote' data-author="'mwilliams'" data-cid="77398" data-time="1306160422" data-date="23 May 2011 - 07:20 AM">
In the designer, if you click on your chart and then select the script tab under the design window, you'll see the onRender method there. </blockquote>
 
:blink: That's what I did without knowning.

Now I also know why the other chart was not effected by the script. 
 
there's one reason why I didn't see that at the first time: 
Since my labels are too long to be displayed one by one, the engine automatically removes every 2nd label. when I tell the engine to display every 3rd one (as in your script), the effect is , that 1 of 6 labels is displayed !!! 
 
I found out by taking short labels. 
 
My final solution is turn the labels for 90 degrees. That works fine !

Thx a lot

mwilliams

Glad you found the rotation setting! Let us know whenever you have questions!