Nebula2探秘07-使用Tcl脚本服务II

2007-05-16     推荐:7872270    收藏:5093813    评论:0     来源:e800开发者频道

Nebula2探秘07-使用Tcl脚本服务II

happykevins文

在前一节中已经介绍了如何在程序中创建和使用TclServer,在程序中调用Tcl指令;这一节我们将学习如何通过与前一节完全相反的途径来使用Tcl。

Nebula2的程序与脚本联系的纽带是NOH,NOH是Nebula2的程序和脚本可以共同访问的数据结构,因此我们可以通过在脚本中访问NOH来实现与程序的交互。

下面用代码来说明这个交互过程:

下面是创建tcl-server的代码(与上一节相同),/sys/servers/script”是Nebula2脚本服务在NOH中的固定路径,不能改变:

/// 创建tclserver
nTclServer* tcl = (nTclServer*)ks->New(ntclserver, /sys/servers/script);

下面一段代码调用了”T07_UsingTclServerII.tcl”脚本程序:

/// 调用脚本文件,在脚本文件中将会通过NOH系统回调Nebula对象
nString ret;
tcl
->RunScript(bin:../../DataFiles/Scripts/T07_UsingTclServerII.tcl, ret);

”T07_UsingTclServerII.tcl”的内容如下:

#-------------------------------------------------------------------------------
# T07 UsingTclServer II - 在Tcl脚本中调用KernelServer对象
# @by happykevins
#-------------------------------------------------------------------------------

puts *****Begin Script File!*****
puts
*****Create nkernelinfohelper*****

new nkernelinfohelper
/sys/servers/ks_info

sel
/sys/servers/ks_info
puts
*****Invoke logcls cmd*****
.logcls
puts
*****Invoke lognoh cmd*****
.lognoh /

puts
*****End Script File!*****

这段tcl脚本首先使用new语句在NOH中的”/sys/servers/ks_info”位置创建了一个nkernelinfohelper 的对象,然后通过sel语句将其设置成当前工作对象,接着调用了logcls和lognoh方法。

下面给出Nebula2文档中列出的一些Tcl的简单语法:

Common Commands (Nebula2Docs@nTclServer)
-----------------------------------------------------------------------------------------------------------------------------
new classname path
Create a new object of the specified class at the specified path in the NOH. Returns true on success and nil on failure.

example:
new ''ntransformnode'' ''tm''
new ''nd3d9server'' ''/sys/servers/gfx''
-----------------------------------------------------------------------------------------------------------------------------
delete path
Delete the NOH object at the specified location in the NOH. Returns true on success and nil on failure.

example:
delete ''/usr/scene/myobject''
-----------------------------------------------------------------------------------------------------------------------------
sel path
Set the current working directory of the NOH to the specified path. Returns true on success and nil on failure.

example:
sel ''/sys/servers/gfx''
-----------------------------------------------------------------------------------------------------------------------------
psel
Returns the full path of the currently selected object.
-----------------------------------------------------------------------------------------------------------------------------
exit
Exit Nebula. Exit does not return a value.
-----------------------------------------------------------------------------------------------------------------------------
puts string
Echo the provided string to the Kernel server''s log handler chain.(only on Micro TCL)

example:
puts ''fish <)))<''<br>
-----------------------------------------------------------------------------------------------------------------------------
dir
Return a table containing the names of the children of the current working directory in the NOH.
-----------------------------------------------------------------------------------------------------------------------------
exists path
RCheck whether object exists. Return ”1” if yes, return ”0” if no.
-----------------------------------------------------------------------------------------------------------------------------
emit object.signal arg1 arg2 arg3
Implement signal emission (emit command).
-----------------------------------------------------------------------------------------------------------------------------
post time object.signal arg1 arg2 arg3
Post signal and commands (post command).

Nebula2还另外提供了luaserver,pythonserver等脚本服务器,创建过程和使用方法与tclserver差不多;关于Nebula2的Tcl及脚本服务的使用方法就介绍到这儿,你现在应该已经掌握了其基本用法,是不是觉得很容易:)

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