PyQt QStackedWidget小部件

QStackedWidget的功能类似于QTabWidget。它还有助于有效利用窗口的客户区。

QStackedWidget提供了一组小部件，一次只能查看其中一个小部件。它是建立在QStackedLayout之上的有用布局。

示例

一个父级QStackedWidget对象中填充了多个子部件。

self.Stack = QStackedWidget (self)
self.stack1 = QWidget()
self.stack2 = QWidget()
self.stack3 = QWidget()

self.Stack.addWidget (self.stack1)
self.Stack.addWidget (self.stack2)
self.Stack.addWidget (self.stack3)

每个子部件都可以有自己的表单元素布局。QStackedWidget本身不能在页面之间切换。它与QListWidget的当前选择的索引相关联。

self.leftlist = QListWidget ()
self.leftlist.insertItem (0, 'Contact' )
self.leftlist.insertItem (1, 'Personal' )
self.leftlist.insertItem (2, 'Educational' )
self.leftlist.currentRowChanged.connect(self.display)

这里，QListWidget 的 currentRowChanged() 信号被连接到 display() 函数，该函数会改变 stacked widget 的视图。

def display(self,i):
   self.Stack.setCurrentIndex(i)

完整的代码如下：

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class stackedExample(QWidget):

   def __init__(self):
      super(stackedExample, self).__init__()
        self.leftlist = QListWidget ()
      self.leftlist.insertItem (0, 'Contact' )
      self.leftlist.insertItem (1, 'Personal' )
      self.leftlist.insertItem (2, 'Educational' )

      self.stack1 = QWidget()
      self.stack2 = QWidget()
      self.stack3 = QWidget()

      self.stack1UI()
      self.stack2UI()
      self.stack3UI()

      self.Stack = QStackedWidget (self)
      self.Stack.addWidget (self.stack1)
      self.Stack.addWidget (self.stack2)
      self.Stack.addWidget (self.stack3)

      hbox = QHBoxLayout(self)
      hbox.addWidget(self.leftlist)
      hbox.addWidget(self.Stack)

      self.setLayout(hbox)
      self.leftlist.currentRowChanged.connect(self.display)
      self.setGeometry(300, 50, 10,10)
      self.setWindowTitle('StackedWidget demo')
      self.show()

   def stack1UI(self):
      layout = QFormLayout()
      layout.addRow("Name",QLineEdit())
      layout.addRow("Address",QLineEdit())
      #self.setTabText(0,"Contact Details")
      self.stack1.setLayout(layout)

   def stack2UI(self):
      layout = QFormLayout()
      sex = QHBoxLayout()
      sex.addWidget(QRadioButton("Male"))
      sex.addWidget(QRadioButton("Female"))
      layout.addRow(QLabel("Sex"),sex)
      layout.addRow("Date of Birth",QLineEdit())

      self.stack2.setLayout(layout)

   def stack3UI(self):
      layout = QHBoxLayout()
      layout.addWidget(QLabel("subjects"))
      layout.addWidget(QCheckBox("Physics"))
      layout.addWidget(QCheckBox("Maths"))
      self.stack3.setLayout(layout)

   def display(self,i):
      self.Stack.setCurrentIndex(i)

def main():
   app = QApplication(sys.argv)
   ex = stackedExample()
   sys.exit(app.exec_())

if __name__ == '__main__':
   main()

以上代码产生以下输出−

PyQt QStackedWidget小部件