2016/7/20 1:14:45 PyQT5 实现点击隐藏，展开效果

2016/7/20 1:14:45

code

#!/usr/bin/env python
 
 
#############################################################################
##
## Copyright (C) 2013 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
##   * Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer.
##   * Redistributions in binary form must reproduce the above copyright
##     notice, this list of conditions and the following disclaimer in
##     the documentation and/or other materials provided with the
##     distribution.
##   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
##     the names of its contributors may be used to endorse or promote
##     products derived from this software without specific prior written
##     permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
## $QT_END_LICENSE$
##
#############################################################################
 
 
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QApplication, QCheckBox, QDialog,
        QDialogButtonBox, QGridLayout, QHBoxLayout, QLabel, QLayout, QLineEdit,
        QPushButton, QVBoxLayout, QWidget)
 
 
class FindDialog(QDialog):
    def __init__(self, parent=None):
        super(FindDialog, self).__init__(parent)
 
        label = QLabel("Find &what:")
        lineEdit = QLineEdit()
        label.setBuddy(lineEdit)
 
        caseCheckBox = QCheckBox("Match &case")
        fromStartCheckBox = QCheckBox("Search from &start")
        fromStartCheckBox.setChecked(True)
 
        findButton = QPushButton("&Find")
        findButton.setDefault(True)
 
        moreButton = QPushButton("&More")
        moreButton.setCheckable(True)
        moreButton.setAutoDefault(False)
 
        extension = QWidget()
 
        wholeWordsCheckBox = QCheckBox("&Whole words")
        backwardCheckBox = QCheckBox("Search &backward")
        searchSelectionCheckBox = QCheckBox("Search se&lection")
 
        buttonBox = QDialogButtonBox(Qt.Vertical)
        buttonBox.addButton(findButton, QDialogButtonBox.ActionRole)
        buttonBox.addButton(moreButton, QDialogButtonBox.ActionRole)
 
        moreButton.toggled.connect(extension.setVisible)
 
        extensionLayout = QVBoxLayout()
        extensionLayout.setContentsMargins(0, 0, 0, 0)
        extensionLayout.addWidget(wholeWordsCheckBox)
        extensionLayout.addWidget(backwardCheckBox)
        extensionLayout.addWidget(searchSelectionCheckBox)
        extension.setLayout(extensionLayout)
 
        topLeftLayout = QHBoxLayout()
        topLeftLayout.addWidget(label)
        topLeftLayout.addWidget(lineEdit)
 
        leftLayout = QVBoxLayout()
        leftLayout.addLayout(topLeftLayout)
        leftLayout.addWidget(caseCheckBox)
        leftLayout.addWidget(fromStartCheckBox)
 
        mainLayout = QGridLayout()
        #关键性的参数设置
        mainLayout.setSizeConstraint(QLayout.SetFixedSize)
         
        mainLayout.addLayout(leftLayout, 0, 0)
        mainLayout.addWidget(buttonBox, 0, 1)
        mainLayout.addWidget(extension, 1, 0, 1, 2)
        mainLayout.setRowStretch(2, 1)
        self.setLayout(mainLayout)
 
        self.setWindowTitle("Extension")
        extension.hide()
 
 
if __name__ == '__main__':
 
    import sys
 
    app = QApplication(sys.argv)
    dialog = FindDialog()
    dialog.show()
    sys.exit(app.exec_())

来自为知笔记(Wiz)