文本字段查询以替换前缀

问题描述

我正忙于在装配工具中创建一个函数，该函数允许对关节进行镜像并替换前缀.关节(行为和方向)的镜像都起作用，但是当我search and replace两个文本字段中的内容时出现错误.场景中关节的前缀是R_或L_，我想用这个替换它们.

I'm busy creating a function in my rigging tool which allows mirroring of joints and replacing the prefix. The mirroring of joints (both behaviours and orientation) is working but I get an error when I search and replace what is in my two text fields. The prefix of joints in the scene is either R_ or L_ and I would like to replace them with this.

错误如下:NameError:名称searchFor未定义.奇怪的是，我实际上创建了一个名为searchFor的变量和一个名为replaceWith的变量.请参见下面的代码:

The error is as follows: NameError: name searchFor is not defined. The odd part here is that I actually create a variable called searchFor and one called replaceWith. See the code below:

import maya.cmds as cmds

child2 = cmds.gridLayout( cw = self.size[ 0 ] / 2 - 10, nc = 2 )
cmds.text( l = ' Mirror Joints', al = 'left', font = "boldLabelFont" )
cmds.separator( style = 'none' )
searchFor = cmds.textFieldGrp( tx = 'Search for...' )
replaceWith = cmds.textFieldGrp( tx = 'Replace with...' )

cmds.button( label = 'Mirror Orientation',
             command = "cmds.mirrorJoint( cmds.ls( sl = True ),
             mirrorYZ = True,
             mirrorBehavior = False,
             searchReplace = cmds.textFieldGrp( searchFor, q = True, tx = True),
             cmds.textFieldGrp( replaceWith, q = True, tx = True )" )

cmds.button( label = 'Mirror Behaviour',
             command = "cmds.mirrorJoint( cmds.ls ( sl = True ),
             mirrorYZ = True,
             mirrorBehavior = True )" )

该代码是UI的一部分，就像在其他模块中调用其他功能一样.是否可能需要在UI模块中创建一个包含mirrorJoint命令的函数?还是这是可行的方法?

The code is part of the UI as where the other functions are called forth from another module. Can it be that I need to create a function which includes the mirrorJoint command in the UI module? Or is this a viable approach?

为更好地查看代码，请执行以下操作:https://dl.dropboxusercontent.com/u/545575/python .zip

For a better view of the code:https://dl.dropboxusercontent.com/u/545575/python.zip

推荐答案

您正在使用字符串来调用该函数，并且该字符串将在全局范围内进行解释-就像您在侦听器中键入了该字符串一样；在您的函数主体之外，'searchFor'不存在.

You're using a string to call the function, and that string gets interpreted in the global scope - as if you'd typed it in the listener; outside the body of your function, 'searchFor' does not exist.

以下是有关Maya如何看待回调命令的参考: http: //techartsurvival.blogspot.com/2014/04/maya-callbacks-cheat-sheet.html

Here's a reference on how maya sees callback commands: http://techartsurvival.blogspot.com/2014/04/maya-callbacks-cheat-sheet.html

MHLester的示例可以满足您的要求，您必须提防闭包. Lambda将从定义它的作用域中继承变量-但是在作用域关闭时而不是在定义时；这可能会引起一些意外.例如，如果您尝试这样做:

MHLester's example will do what you want, you will have to watch out for closures. The lambda will inherit variables from the scope where it is defined -- but at the time the scope closes, not at the time it was defined; this might cause some surprises. For example if you tried this:

def test():
    w = cmds.window()
    cmds.columnLayout()
    example = 1
    cmds.button("test", c= lambda *_:  sys.stdout.write( "example: %i" % example ) )
    example = 4
    cmds.showWindow(w)

单击该按钮将显示"4"，即使它看起来应该是"1".

clicking the button will print '4', even though it looks like it should be '1'.

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