qtExampleUI-PyQt4与maya互动的例子

在 python_inside_maya中看到的一个简单的PyQt例子，我已经加入注释希望对大家有帮助。
如下图，点击Refresh按钮会将maya中所选的物体添加到列表中，如没选择任何物体则清空列表。



使用方法：
将qtExampleUI.py和pumpThread.py文件放到以下路径中

引用

C:/Documents and Settings/你的用户名/My Documents/maya/2008/prefs/scripts 
C:/Documents and Settings/你的用户名/My Documents/maya/scripts

在maya的脚本编辑器中的python面板中执行

import qtExampleUI
qtExampleUI.ExampleUI.Display()

# import qtExampleUI as qeui
# qeui.ExampleUI.Display()

qtExampleUI.py

# -*- coding: UTF-8 -*-

from PyQt4 import QtCore, QtGui 
import maya.cmds as cmds 
import pumpThread 

# UI class
class ExampleUI( QtGui.QDialog ): 
    def __init__( self, parent=None ): 
        super( ExampleUI, self ).__init__( parent ) 
        # Set some basic properties on the UI 
        # 设置UI的基本属性
        self.setWindowTitle( 'ExampleUI' ) 
        self.setObjectName( "ExampleUI" ) 
        self.setAttribute( QtCore.Qt.WA_DeleteOnClose ) 
        # Add a Layout and set it to the UI 
        # 添加一个Layout(布局)并设置到UI中
        self.mainLayout = QtGui.QVBoxLayout( self ) 
        self.setLayout( self.mainLayout ) 
        # Add a Button and set some properties. 
        # Also add it to a layout. 
        # 添加一个按钮并设置一些属性
        # 同时将它添加到layout中
        self.RefreshButton = QtGui.QPushButton() 
        self.RefreshButton.setText( "Refresh" ) 
        self.mainLayout.addWidget( self.RefreshButton ) 
        # Add a list and set it to the layout 
        # 添加一个列表并将它添加到layout中
        self.SelectionList = QtGui.QListWidget() 
        self.SelectionList.setMinimumSize( 250, 250 ) 
        self.mainLayout.addWidget( self.SelectionList ) 
        # Connect the Refresh Button to a function to populate the list 
        # using SIGNAL's 
        # 给Refresh按钮连接信号
        # 当按钮被点击，会调用_RefreshButtonFunc方法
        self.connect( self.RefreshButton, QtCore.SIGNAL( "clicked()" ),
                      self._RefreshButtonFunc ) 
        
    # 将maya中选择的物体添加到列表中的方法
    def _RefreshButtonFunc( self ): 
        ''' 
        Fill the list based on a maya selection 
        ''' 
        oSel = cmds.ls( sl=1 ) 
        if oSel: 
            self.SelectionList.clear() 
            for i in oSel: self.SelectionList.addItem( i )
            #[self.SelectionList.addItem(s) for s in oSel] 
        else: 
            self.SelectionList.clear() 
            
    @staticmethod 
    def Display(): 
        ''' 
        calls the window.  Typical PumpThread call 
        Use's a modified pumpThread that properly set's up the thread. 
        ''' 
        # We need a global to stop python gc the UI 
        global mainWindow 
        # We need pumpThread to make the UI responsive
        # 我们需要 pumpThread来让UI有回应
        pumpThread.initializePumpThread() 
        app = pumpThread.get_app() 
        if app: 
            # We can set the app to use a nice style 
            # 我们可以设置一个好看的样式
            app.setStyle( 'Plastique' ) 
            mainWindow = ExampleUI() 
            mainWindow.show()
            
#ExampleUI.Display()

pumpThread.py

########################### 
from PyQt4 import QtCore, QtGui 
import maya.utils as utils 
import sys 
import time 
import threading 
import maya.cmds as cmds 
pumpedThread = None 
app = None 
gPump = True 
def get_app(): 
    global app 
    return app 
def set_app( i_app ): 
    global app 
    testAppInstance = QtCore.QCoreApplication.instance() 
    if testAppInstance: 
        app = testAppInstance 
    else: 
        app = i_app 
def get_pt(): 
    global pumpedThread 
    return pumpedThread 
def set_pt( i_pt ): 
    global pumpedThread 
    pumpedThread = i_pt 
def pumpQt(): 
    global app 
    global gPump 
    processorEv = threading.Event() 
    def processor(): 
        app.processEvents() 
        processorEv.set() 
    while gPump: 
        utils.executeDeferred( processor ) 
        processorEv.wait() 
        processorEv.clear() 
        time.sleep( 0.01 ) 
def killProcess(): 
    global gPump 
    gPump = False 
def killPumpThread(): 
    if get_app(): 
        get_app().closeAllWindows() 
    if get_pt(): 
        while get_pt().isAlive(): 
            killProcess() 
        set_pt( None ) 
        set_app( None ) 
def initializePumpThread(): 
    global gPump 
    gPump = True 
    if get_pt() == None:
        set_app( QtGui.QApplication( sys.argv ) ) 
        set_pt( threading.Thread( target=pumpQt, args=() ) ) 
        get_pt().start()