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  How to use tips without dislplaying labels
Posted by Leonid on Apr-21-2009 23:02
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I use CharDirector v. 5.0 (C++ Edition) and VS 2008.
I need to use
   1) TIPS without displaying x-axe labels for vertical bar-charts
   2) TIPS without displaying labels for pie-charts

Is it possible?

Thanks in advance,
   Leonid

  Re: How to use tips without dislplaying labels
Posted by Peter Kwan on Apr-22-2009 00:46
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Hi Leonid,

In ChartDirector, the tooltips are configurable. You can display anything you like.

For example, in mfcdemo version of the "Simple Bar Chart" sample code, the tooltip is configured as:

"title='{xLabel}: US${value}K'"

If you just want to show the value, you may remove the {xLabel}, like:

"title='{value}'"

Similarly, in the mfcdemo version of the "Simple Bar Chart" sample code, the tooltip is configured as:

"title='{label}: US${value}K ({percent}%)'"

If you just want to show the value and/or the percentage, you may use:

"title='{value} ({percent}%)'"

Hope this can help.

Regards
Peter Kwan

  Re: How to use tips without dislplaying labels
Posted by Leonid on Apr-22-2009 14:52
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Hi Peter,
   thank you for such fast answer!
But my problem is another one you tried to help me. Probably I explained it not well.

This is the fragment om my usage of Simple Bar Chart:

...
   double data[] = {26, 14, ...};
   const char *labels[] = {"124/002 Normal Mode", "026/014 Testing Mode",...};
...
   c->addBarLayer(DoubleArray(data, sizeof(data)/sizeof(data[0])))
   c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0])));
*imageMap = c->getHTMLImageMap("clickable", "", "title='Device {xLabel} : Failed {value}%'");

  In that case tips are "Device 124/002 Normal Mode : Failed 26%" and
                              "Device 026/014 Testing Mode : Failed 14%"...

Now the problem.
   I don't want to display lables at all because of two reasons: large amount of labels (more than 40-50) and long label names. From another side, the information in tip completely satisfies me.
   That is why I want TO HIDE (if possible) x-axis lables at all and use only tips.
As I understand, getHTMLImageMap(...) uses lables array only if previously was called xAxis()->setLabels(...). If "//c->xAxis()->setLabels(...)" tips are
  "Device  : Failed 26%" and
  "Device  : Failed 14%"...
That is unacceptable.
   In the case of Simple Bar Chart I partially solved the problem with
   "c->xAxis()->setLabelStep(1000)". Better than nothing:) But I have the first lable mandatory.
Another solution for bar-charts is to use Borderless Bars, but it is something else:(
   In the case of Pie-Chart the problem becomes awful...I can't use them at all:(

Once more, thanks a lot, Peter! Maybe you'll have any ideas: )

Leonid.

  Re: How to use tips without dislplaying labels
Posted by Peter Kwan on Apr-22-2009 16:26
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Hi Leonid,

There are many methods to hide the x-axis labels. For example, you may set their colors to transparent:

c->xAxis()->setLabelStyle("normal", 8, Chart::Transparent);

Alternatively, you can choose not to use x-axis labels at all. Instead, the text strings can be added as an "extra field" to the chart, like:

c->addExtraField(StringArray(labels, sizeof(labels)/sizeof(labels[0])));

Your tooltips can then be configured to show the extra field instead of the x-axis labels.

*imageMap = c->getHTMLImageMap("clickable", "", "title='Device {field0} : Failed {value}%'");

Hope this can help.

Regards
Peter Kwan

  Re: How to use tips without dislplaying labels
Posted by Leonid on Apr-22-2009 18:24
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Hi, Peter, thank you very much! You solved my problem:)

Regards,
   Leonid.

  Re: How to use tips without dislplaying labels
Posted by Rob on Sep-03-2009 01:47
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I to need to format the tool-tip differently, but am having an issue with the syntax.

My need is to format the value as currency, but based on the regional settings.

Here is what I am currently doing:

.ImageMap = c.getHTMLImageMap("clickable", "PrimaryKey={field0}", "title='{label}: " & _
                                             NumberFormatInfo.CurrentInfo.CurrencySymbol & "{value}'")

What I need is more detail. I need the commas and decimal point also.

  Re: How to use tips without dislplaying labels
Posted by Peter Kwan on Sep-03-2009 03:01
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Hi Rob,

You may try:

NumberFormatInfo.CurrentInfo.CurrencySymbol & "{value|" & NumberFormatInfo.CurrentInfo.NumberGroupSeparator &  NumberFormatInfo.CurrentInfo.NumberDecimalSeparator "}'"

Hope this can help.

Regards
Peter Kwan