Scrollable APEX chart legends

Question

I'm using various apex charts for a dashboard application, and am utilizing the legend. However, on some of the charts, the dynamically generated legend has numerous items that exceed the height of the chart region. I noticed a scrollable tag in the xml, which would be ideal, but when I set it to yes it just displays a non-functioning scroll bar, and adding width and heighth parameters doesn't seem to change anything. Does anyone have any suggestions for this?
Thanks!

Answer 1

You can't get axis scale variables to work in the APEX declaritive GUI because it's not designed for that. You will have to switch to custom XML.
Set everything you want -- that you can set -- because once you switch to XML, if you switch back I think you lose all those custom settings. Then when you set Custom to "Yes", drag the window widget to enlarge the window so you can edit more easily.
Find the y_xis section of the XML.
        <axes>
          <y_axis >
            <scale   mode="Normal"    />
            <title>
              <text>Directory Size (Gigabytes)</text>
              <font family="Tahoma" size="16" color="0x000000" />
            </title>
            <labels enabled="true" position="Outside">
              <font family="Tahoma" size="10" color="0x000000" />
              <format><![CDATA[{%Value}{numDecimals:1,decimalSeparator:.,thousandsSeparator:\,}]]></format>
            </labels>
            <major_grid enabled="True" interlaced="false">
                <line color="Black" />
              </major_grid>
<minor_grid enabled="True">
              </minor_grid>
          </y_axis>You want to change the scale line between <y_axis>   </y_axis> to
<scale mode="Normal"  maximum="100" minimum="0" />Or maybe it's just <scale maximum="100" minimum="0" />Except instead of constants, you want variables. I'm not sure you can use bind variable (:P7_YMAX, :P7_YMIN) you may have to use (#YMAX#, #YMIN#) variables.
I would make a new page and experiment with some VERY simple data -- maybe constants in a SELECT -- SELECT ..., 1, 2, 3 from dual ...... until you get what works.
And, again. This assumes you decide on some computation to compute the values of (:P7_YMAX, :P7_YMIN) or (#YMAX#, #YMIN#) you want it to use.
Howard