Setting chart appearance from an external source?
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Topic: Setting chart appearance from an external source?
Posted By: wssdev
Subject: Setting chart appearance from an external source?
Date Posted: 03 January 2012 at 4:20am
[XTP 15.1.3]
Hi,
Am I missing something or there is no way to do chart appearance serialization to a string and back?
CXTPChartAppearance::LoadAppearance() seems to be accepting only a
resource ID, implying that the appearance data must be a resource.
Internally, CXTPChartAppearance::LoadFromResource delegates the actual
deserialization work to
CXTPPropExchangeXMLNode. CXTPPropExchangeXMLNode itself does have a
number of LoadXXX methods so apparently it can load content from a
string or a file. Unfortunately, these methods are not
exposed through CXTPChartAppearance anyhow.
I was thinking about deriving from CXTPChartAppearance and
re-implementing LoadAppearance so that it calls
CXTPPropExchangeXMLNode::LoadFromString instead of
CXTPPropExchangeXMLNode::LoadFromResource. However, that would not be
enough. Even if I had my derived instance, CXTPChartContent would not
allow me to set that instance on it. I would then need
to go through the hassle of deriving from CXTPChartContent too, only to
be able to inject my own appearance.
Is there a simpler way to achieve serialization/deserialization to a string?
Thanks in advance.
[Update]
I just realized that deriving won't work, LoadFromResource is not virtual. Besides, hijacking LoadFromResource to load from an external string would already be a hack...
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Replies:
Posted By: wssdev
Date Posted: 04 January 2012 at 10:45am
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OK, found it in Samples\Chart\ChartBrowser\ChartFromFileView.cpp, CreateChart() method.
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