QScriptEngine::importExtension()

Hello All,
I have read the describe about QScriptEngine::importExtension() and the artical "Creating QtScript Extensions",but I have not found out how to use this function. Anyone can give me a sample. Thanks.

First way.
Create 'script' directory near your executable file.
Create 'script/org' subdirectory.
Create 'script/org/__init__.js' file:

Code:

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__setupPackage__(__extension__);

---

Create 'script/org/mylib' subdirectory.
Create 'script/org/mylib' file:

Code:

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__setupPackage__(__extension__);
org.mylib.myAddition = function(a, b) {
  return a + b;
}

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You have created an extension 'org.mylib' that provides a function myAddition.

Code:

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QScriptEngine::importExtension('org.mylib');
// print QVariant(int, 3);
qDebug() << QScriptEngine::globalObject()::property('org').property('mylib').property('myAddition').call(QScriptEngine::globalObject(), QScriptValueList() << 1 << 2).toVariant();

---

For second way, see Qt Script Generator, which generate qt script plugin extensions for all qt classes.

Hi,asvil
Thanks very much for you reply .I have try your ways .
but I still have some questions.
1. Can I change the script files path,not only put them in the script near the executable file?
2. The artical "creating qtscript extention" introduces that "QScriptEngine will look for a QScriptExtensionPlugin that provides the relevant extension by querying each plugin for its keys() until a match is found. The plugin's initialize() function will be called after the relevant __init__.js (if any) has been evaluated."
If I create a QScriptExtensionPlugin class , whether I import the plugin only can by the way of static extensions.

Quote:

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Originally Posted by wookoon

Hi,asvil
Thanks very much for you reply .I have try your ways .
but I still have some questions.
1. Can I change the script files path,not only put them in the script near the executable file?

---

Yes, QCoreApplication::addLibraryPath();

Quote:

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Originally Posted by wookoon

......If I create a QScriptExtensionPlugin class , whether I import the plugin only can by the way of static extensions.

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What do you mean? Link qt plugins statically? QScriptExtensionPlugin class may be linked statically or dynamically. It depends on your project architecture.

Hello!

I have registered just today, since I also have a problem with this. I am developing on Linux with 4.6. I have followed the above steps carefully, double checked these steps:

-> created a directory in the same path as the executable is in called "Extensions"
-> added the path including Extensions to libraryPaths() of my QApplication instance, confirmed that by calling libraryPaths()
-> created a directory "math" in "Extensions"
-> created a file __init__js in "math"
-> put the following code into __init__.js:

Code:

---

__setupPackage__("math");
 
math.add = function(a, b)
{
	return a+b;
}

---

Closed all files, compiled the whole thing from scratch, but

Code:

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eng->importExtension("math");

---

complains that there is no "math"-Extension available. Any advice?

May be create 'script' directory in your 'Extensions', and work only in 'script'.

Wow, thank you very much for the great answer, works like a charm now. Is it necessary to a "script" directory? It's not a big issue, just some "make-up", because all files in the project's folder are starting with a capital.

Yes, it's necessary to a "script" directory. This string hard-coded in qt.

I can't seem to get namespaces to work at all. It actually throws a parse error when I try to make a namespace. I can only seem to create functions and variables in global space.

This is from a different post, but it has a simple example of mine I haven't been able to get working.

http://www.qtcentre.org/threads/4307...ght=namespaces

Does anyone see a problem with what I'm doing? It seems exactly like the examples in previous replies.