Add PyQT Chinese translation

zh-cn/pyqt-cn.html.markdown

@@ -3,44 +3,44 @@ category: tool
 tool: PyQT
 filename: learnpyqt.py
 contributors:
+    - ["Nathan Hughes", "https://github.com/sirsharpest"]
+translators:
     - ["kdxcxs", "https://github.com/kdxcxs"]
+lang: zh-cn
 ---
 
-**Qt** is a widely-known framework for developing cross-platform software that can be run on various software and hardware platforms with little or no change in the code, while having the power and speed of native applications. Though **Qt** was originally written in *C++*.
+**Qt** 是一个著名的用C++实现的跨平台软件开发框架。只需更改少量甚至有时候不需要更改代码就能在多个软硬件平台上运行。
 
 
-This is an adaption on the C++ intro to QT by [Aleksey Kholovchuk](https://github.com/vortexxx192
-), some of the code examples should result in the same functionality
-this version just having been done using pyqt! 
+这是[Aleksey Kholovchuk](https://github.com/vortexxx192)对QT的C++简介的改编，用pyqt实现了一些相同功能的代码！
 
 ```python
 import sys
 from PyQt4 import QtGui
 	
 def window():
-	# Create an application object 
+	# 创建应用对象
     app = QtGui.QApplication(sys.argv)
-	# Create a widget where our label will be placed in
+	# 创建一个widget，label将会被放置在里面
     w = QtGui.QWidget()
-	# Add a label to the widget 
+	# 在widget中添加一个label
     b = QtGui.QLabel(w)
-	# Set some text for the label 
+	# 设置label的文字
     b.setText("Hello World!")
-	# Give some size and placement information 
+	# 设置尺寸和位置
     w.setGeometry(100, 100, 200, 50)
     b.move(50, 20)
-	# Give our window a nice title 
+	# 设置窗口的标题
     w.setWindowTitle("PyQt")
-	# Have everything display
+	# 将所有东西都显示出来
     w.show()
-	# Execute what we have asked for, once all setup
+	# 完成所有设置后，执行我们要求的操作
     sys.exit(app.exec_())
 if __name__ == '__main__':
     window()
 ```
 
-In order to get some of the more advanced features in **pyqt** we need to start looking at building additional elements. 
-Here we show how to introduce a dialog popup box, useful for asking the user to confirm a decision or to provide information.
+为了获得pyqt中的一些更高级的功能，我们需要开始研究构建其他元素。在这里，我们展示了如何使用弹出对话框，该对话框对于要求用户确认操作或提供信息很有用。
 
 ```Python 
 import sys
@@ -49,28 +49,31 @@ from PyQt4.QtCore import *
 def window():
     app = QApplication(sys.argv)
     w = QWidget()
-    # Create a button and attach to widget w
+    # 创建一个按钮并附加到widget w
     b = QPushButton(w)
     b.setText("Press me")
     b.move(50, 50)
-    # Tell b to call this function when clicked
-    # notice the lack of "()" on the function call
+    # 当按钮b被点击时调用下面这个函数
+    # 注意函数调用时没有“()”，这样函数就能以对象的方式传入而非调用它所得到的返回值
+    # 更多关于pyqt函数调用、传参等的内容见pyqt的信号机制
     b.clicked.connect(showdialog)
     w.setWindowTitle("PyQt Dialog")
     w.show()
     sys.exit(app.exec_())
 	
-# This function should create a dialog window with a button
-# that waits to be clicked and then exits the program
+# 此函数将会创建一个带有按钮的对话框窗口
+# 当按钮被点击时会退出这个程序
 def showdialog():
     d = QDialog()
     b1 = QPushButton("ok", d)
     b1.move(50, 50)
     d.setWindowTitle("Dialog")
+    # 这里的模态实现了在对话框弹出时阻塞程序同时屏蔽父窗口
     # This modality tells the popup to block the parent whilst it's active
     d.setWindowModality(Qt.ApplicationModal)
-    # On click I'd like the entire process to end
+    # 当按钮被点击时整个进程将会结束
     b1.clicked.connect(sys.exit)
     d.exec_()
 if __name__ == '__main__':
-    window()
+    window()
+```