92 lines
3.0 KiB
Plaintext
92 lines
3.0 KiB
Plaintext
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Schema for Validation of XRC files
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==================================
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0. Overview
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-----------
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The files in this directory allow you to check correctness of the XRC files by
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verifying that their contents conforms to wxWidgets XRC schema. Doing this is a
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good way to detect some common errors in manually-written XRC files, even
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though it doesn't currently detect all the possible errors.
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1. Installation
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---------------
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To use them, you need to install Jing, a RELAX NG validator, on your system.
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Jing is available from http://www.thaiopensource.com/relaxng/jing.html and is a
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Java program, so it requires a working Java Runtime Environment installation.
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If you are using Windows and already have a working JRE, you can download Jing
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packaged as a Windows executable from
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http://sourceforge.net/projects/wxwindows/files/tools/jing.zip/download
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2. Usage
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--------
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Once you have a working version of Jing, you can use it directly as following:
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jing -c http://www.wxwidgets.org/wxxrc your-file.xrc
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Alternatively, you can also use wxrc --validate or --validate-only options:
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wxrc --validate-only your-file.xrc
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(notice that this still requires jing to be installed).
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3. Customization
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----------------
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Using xrc_schema.rnc only validates the standard wxWidgets classes and skips
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any custom ones, for which you might have your own XRC handlers defined. If
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you don't use any custom XRC handlers at all, you may prefer to use
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xrc_schema_builtin_only.rnc schema instead of xrc_schema.rnc which won't accept
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any non-standard classes at all -- this is useful for detecting any typos.
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If you do use your own custom classes, then you need to define your own
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validations rules for them. Please see comments in xrc_schema.rnc for more
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details about how to do it, but here is a motivating example showing that it is
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not too difficult to validate your own classes:
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#
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# RELAX NG schema for extended XRC with support for custom handlers.
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#
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default namespace = "http://www.wxwidgets.org/wxxrc"
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namespace xrc = "http://www.wxwidgets.org/wxxrc"
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include "http://www.wxwidgets.org/wxxrc" {
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customClasses = RoundingButtons | InputSequenceEntry
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}
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# Simplest possible example: no special properties for this handler.
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RoundingButtons =
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element object {
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attribute class { "RoundingButtons" } &
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stdObjectNodeAttributes &
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stdWindowProperties
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}
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# This handler has an optional property called "title" containing text.
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InputSequenceEntry =
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element object {
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attribute class { "InputSequenceEntry" } &
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stdObjectNodeAttributes &
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stdWindowProperties &
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[xrc:p="o"] element title {_, t_text }*
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}
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To use a custom schema, you need to pass the full path to the local file
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containing it to Jing or use wxrc --xrc-schema command line option, so you
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could do, for example:
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jing -c $(WXWIN)/misc/schema/xrc_schema_builtin_only.rnc your-file.xrc
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or
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wxrc --validate-only --xrc-schema=my_custom.rnc your-file.xrc
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