python3+PyQt5+Qt Designer实现扩展对话框

本文是对《python qt gui快速编程》的第9章的扩展对话框例子find and replace用python3+pyqt5+qt designer进行改写。

第一部分无借用qt designer，完全用代码实现。
第二部分则借用qt designer，快速实现。

第一部分：

import sys
from pyqt5.qtcore import qt,pyqtsignal
from pyqt5.qtwidgets import (qapplication, qcheckbox, qdialog, qframe,
    qgridlayout, qhboxlayout, qlabel, qlayout, qlineedit,
    qpushbutton, qvboxlayout)



class findandreplacedlg(qdialog):
  find = pyqtsignal(str,bool,bool,bool,bool,bool)
  replace = pyqtsignal(str,str,bool,bool,bool,bool,bool)   

  def __init__(self, parent=none):
    super(findandreplacedlg, self).__init__(parent)

    findlabel = qlabel("find &what:")
    self.findlineedit = qlineedit()
    findlabel.setbuddy(self.findlineedit)
    replacelabel = qlabel("replace w&ith:")
    self.replacelineedit = qlineedit()
    replacelabel.setbuddy(self.replacelineedit)
    self.casecheckbox = qcheckbox("&case sensitive")
    self.wholecheckbox = qcheckbox("wh&ole words")
    self.wholecheckbox.setchecked(true)
    self.moreframe = qframe()
    self.moreframe.setframestyle(qframe.styledpanel|qframe.sunken)
    self.backwardscheckbox = qcheckbox("search &backwards")
    self.regexcheckbox = qcheckbox("regular e&xpression")
    self.ignorenotescheckbox = qcheckbox("ignore foot&notes "
                          "and endnotes")
    line = qframe()
    line.setframestyle(qframe.vline|qframe.sunken)
    self.findbutton = qpushbutton("&find")
    self.replacebutton = qpushbutton("&replace")
    closebutton = qpushbutton("close")
    self.morebutton = qpushbutton("&more")
    self.morebutton.setcheckable(true)


    gridlayout = qgridlayout()
    gridlayout.addwidget(findlabel, 0, 0)
    gridlayout.addwidget(self.findlineedit, 0, 1)
    gridlayout.addwidget(replacelabel, 1, 0)
    gridlayout.addwidget(self.replacelineedit, 1, 1)
    framelayout = qvboxlayout()
    framelayout.addwidget(self.backwardscheckbox)
    framelayout.addwidget(self.regexcheckbox)
    framelayout.addwidget(self.ignorenotescheckbox)
    self.moreframe.setlayout(framelayout)
    leftlayout = qvboxlayout()
    leftlayout.addlayout(gridlayout)
    leftlayout.addwidget(self.casecheckbox)
    leftlayout.addwidget(self.wholecheckbox)
    leftlayout.addwidget(self.moreframe)
    buttonlayout = qvboxlayout()
    buttonlayout.addwidget(self.findbutton)
    buttonlayout.addwidget(self.replacebutton)
    buttonlayout.addwidget(closebutton)
    buttonlayout.addwidget(self.morebutton)
    buttonlayout.addstretch()
    mainlayout = qhboxlayout()
    mainlayout.addlayout(leftlayout)
    mainlayout.addwidget(line)
    mainlayout.addlayout(buttonlayout)
    self.setlayout(mainlayout)

    self.moreframe.hide()
    mainlayout.setsizeconstraint(qlayout.setfixedsize)

    self.morebutton.toggled[bool].connect(self.setvisible)


    self.findlineedit.textedited.connect(self.updateui)
    self.findbutton.clicked.connect(self.findclicked)
    self.replacebutton.clicked.connect(self.replaceclicked)

    self.updateui()
    self.setwindowtitle("find and replace")

  def setvisible(self,yn):
    self.moreframe.setvisible(yn)


  def findclicked(self):
    self.find.emit(self.findlineedit.text(),
        self.casecheckbox.ischecked(),
        self.wholecheckbox.ischecked(),
        self.backwardscheckbox.ischecked(),
        self.regexcheckbox.ischecked(),
        self.ignorenotescheckbox.ischecked())


  def replaceclicked(self):
    self.replace.emit(self.findlineedit.text(),
        self.replacelineedit.text(),
        self.casecheckbox.ischecked(),
        self.wholecheckbox.ischecked(),
        self.backwardscheckbox.ischecked(),
        self.regexcheckbox.ischecked(),
        self.ignorenotescheckbox.ischecked())


  def updateui(self):
    enable = self.findlineedit.text()
    self.findbutton.setenabled(bool(enable))
    self.replacebutton.setenabled(bool(enable))


if __name__ == "__main__":

  def find(what, *args):
    print("find {0} {1}".format(what, [x for x in args]))

  def replace(old, new, *args):
    print("replace {0} with {1} {2}".format(
       old, new, [x for x in args]))

  app = qapplication(sys.argv)
  form = findandreplacedlg()
  form.find.connect(find)
  form.replace.connect(replace)    
  form.show()
  app.exec_()

第二部分：

/home/yrd/eric_workspace/chap09/findandreplacedlg/ui_findandreplacedlg.py

# -*- coding: utf-8 -*-

# form implementation generated from reading ui file '/home/yrd/eric_workspace/chap09/findandreplacedlg/findandreplacedlg.ui'
#
# created by: pyqt5 ui code generator 5.7
#
# warning! all changes made in this file will be lost!

from pyqt5 import qtcore, qtgui, qtwidgets

class ui_findandreplacedlg(object):
  def setupui(self, findandreplacedlg):
    findandreplacedlg.setobjectname("findandreplacedlg")
    findandreplacedlg.resize(355, 274)
    self.mainlayout = qtwidgets.qhboxlayout(findandreplacedlg)
    self.mainlayout.setsizeconstraint(qtwidgets.qlayout.setfixedsize)
    self.mainlayout.setcontentsmargins(9, 9, 9, 9)
    self.mainlayout.setspacing(6)
    self.mainlayout.setobjectname("mainlayout")
    self.vboxlayout = qtwidgets.qvboxlayout()
    self.vboxlayout.setcontentsmargins(0, 0, 0, 0)
    self.vboxlayout.setspacing(6)
    self.vboxlayout.setobjectname("vboxlayout")
    self.gridlayout = qtwidgets.qgridlayout()
    self.gridlayout.setcontentsmargins(0, 0, 0, 0)
    self.gridlayout.setspacing(6)
    self.gridlayout.setobjectname("gridlayout")
    self.replacelineedit = qtwidgets.qlineedit(findandreplacedlg)
    self.replacelineedit.setobjectname("replacelineedit")
    self.gridlayout.addwidget(self.replacelineedit, 1, 1, 1, 1)
    self.findlineedit = qtwidgets.qlineedit(findandreplacedlg)
    self.findlineedit.setobjectname("findlineedit")
    self.gridlayout.addwidget(self.findlineedit, 0, 1, 1, 1)
    self.label_2 = qtwidgets.qlabel(findandreplacedlg)
    self.label_2.setobjectname("label_2")
    self.gridlayout.addwidget(self.label_2, 1, 0, 1, 1)
    self.label = qtwidgets.qlabel(findandreplacedlg)
    self.label.setobjectname("label")
    self.gridlayout.addwidget(self.label, 0, 0, 1, 1)
    self.vboxlayout.addlayout(self.gridlayout)
    self.vboxlayout1 = qtwidgets.qvboxlayout()
    self.vboxlayout1.setcontentsmargins(0, 0, 0, 0)
    self.vboxlayout1.setspacing(6)
    self.vboxlayout1.setobjectname("vboxlayout1")
    self.casecheckbox = qtwidgets.qcheckbox(findandreplacedlg)
    self.casecheckbox.setobjectname("casecheckbox")
    self.vboxlayout1.addwidget(self.casecheckbox)
    self.wholecheckbox = qtwidgets.qcheckbox(findandreplacedlg)
    self.wholecheckbox.setchecked(true)
    self.wholecheckbox.setobjectname("wholecheckbox")
    self.vboxlayout1.addwidget(self.wholecheckbox)
    self.vboxlayout.addlayout(self.vboxlayout1)
    spaceritem = qtwidgets.qspaceritem(231, 16, qtwidgets.qsizepolicy.minimum, qtwidgets.qsizepolicy.expanding)
    self.vboxlayout.additem(spaceritem)
    self.moreframe = qtwidgets.qframe(findandreplacedlg)
    self.moreframe.setframeshape(qtwidgets.qframe.styledpanel)
    self.moreframe.setframeshadow(qtwidgets.qframe.raised)
    self.moreframe.setobjectname("moreframe")
    self.vboxlayout2 = qtwidgets.qvboxlayout(self.moreframe)
    self.vboxlayout2.setcontentsmargins(9, 9, 9, 9)
    self.vboxlayout2.setspacing(6)
    self.vboxlayout2.setobjectname("vboxlayout2")
    self.backwardscheckbox = qtwidgets.qcheckbox(self.moreframe)
    self.backwardscheckbox.setobjectname("backwardscheckbox")
    self.vboxlayout2.addwidget(self.backwardscheckbox)
    self.regexcheckbox = qtwidgets.qcheckbox(self.moreframe)
    self.regexcheckbox.setobjectname("regexcheckbox")
    self.vboxlayout2.addwidget(self.regexcheckbox)
    self.ignorenotescheckbox = qtwidgets.qcheckbox(self.moreframe)
    self.ignorenotescheckbox.setobjectname("ignorenotescheckbox")
    self.vboxlayout2.addwidget(self.ignorenotescheckbox)
    self.vboxlayout.addwidget(self.moreframe)
    self.mainlayout.addlayout(self.vboxlayout)
    self.line = qtwidgets.qframe(findandreplacedlg)
    self.line.setframeshape(qtwidgets.qframe.vline)
    self.line.setframeshadow(qtwidgets.qframe.sunken)
    self.line.setobjectname("line")
    self.mainlayout.addwidget(self.line)
    self.vboxlayout3 = qtwidgets.qvboxlayout()
    self.vboxlayout3.setcontentsmargins(0, 0, 0, 0)
    self.vboxlayout3.setspacing(6)
    self.vboxlayout3.setobjectname("vboxlayout3")
    self.findbutton = qtwidgets.qpushbutton(findandreplacedlg)
    self.findbutton.setfocuspolicy(qtcore.qt.nofocus)
    self.findbutton.setobjectname("findbutton")
    self.vboxlayout3.addwidget(self.findbutton)
    self.replacebutton = qtwidgets.qpushbutton(findandreplacedlg)
    self.replacebutton.setfocuspolicy(qtcore.qt.nofocus)
    self.replacebutton.setobjectname("replacebutton")
    self.vboxlayout3.addwidget(self.replacebutton)
    self.closebutton = qtwidgets.qpushbutton(findandreplacedlg)
    self.closebutton.setfocuspolicy(qtcore.qt.nofocus)
    self.closebutton.setobjectname("closebutton")
    self.vboxlayout3.addwidget(self.closebutton)
    self.morebutton = qtwidgets.qpushbutton(findandreplacedlg)
    self.morebutton.setfocuspolicy(qtcore.qt.nofocus)
    self.morebutton.setcheckable(true)
    self.morebutton.setobjectname("morebutton")
    self.vboxlayout3.addwidget(self.morebutton)
    spaceritem1 = qtwidgets.qspaceritem(21, 16, qtwidgets.qsizepolicy.minimum, qtwidgets.qsizepolicy.expanding)
    self.vboxlayout3.additem(spaceritem1)
    self.mainlayout.addlayout(self.vboxlayout3)
    self.label_2.setbuddy(self.replacelineedit)
    self.label.setbuddy(self.findlineedit)

    self.retranslateui(findandreplacedlg)
    self.closebutton.clicked.connect(findandreplacedlg.reject)
    self.morebutton.toggled['bool'].connect(self.moreframe.setvisible)
    qtcore.qmetaobject.connectslotsbyname(findandreplacedlg)
    findandreplacedlg.settaborder(self.findlineedit, self.replacelineedit)
    findandreplacedlg.settaborder(self.replacelineedit, self.casecheckbox)
    findandreplacedlg.settaborder(self.casecheckbox, self.wholecheckbox)
    findandreplacedlg.settaborder(self.wholecheckbox, self.backwardscheckbox)
    findandreplacedlg.settaborder(self.backwardscheckbox, self.regexcheckbox)
    findandreplacedlg.settaborder(self.regexcheckbox, self.ignorenotescheckbox)

  def retranslateui(self, findandreplacedlg):
    _translate = qtcore.qcoreapplication.translate
    findandreplacedlg.setwindowtitle(_translate("findandreplacedlg", "find and replace"))
    self.label_2.settext(_translate("findandreplacedlg", "replace w&ith:"))
    self.label.settext(_translate("findandreplacedlg", "find &what:"))
    self.casecheckbox.settext(_translate("findandreplacedlg", "&case sensitive"))
    self.wholecheckbox.settext(_translate("findandreplacedlg", "wh&ole words"))
    self.backwardscheckbox.settext(_translate("findandreplacedlg", "search &backwards"))
    self.regexcheckbox.settext(_translate("findandreplacedlg", "regular e&xpression"))
    self.ignorenotescheckbox.settext(_translate("findandreplacedlg", "ignore foot&notes and endnotes"))
    self.findbutton.settext(_translate("findandreplacedlg", "&find"))
    self.replacebutton.settext(_translate("findandreplacedlg", "&replace"))
    self.closebutton.settext(_translate("findandreplacedlg", "close"))
    self.morebutton.settext(_translate("findandreplacedlg", "&more"))

/home/yrd/eric_workspace/chap09/findandreplacedlg/findandreplacedlg.py

# -*- coding: utf-8 -*-

"""
module implementing findandreplacedlg.
"""

from pyqt5.qtcore import pyqtslot,pyqtsignal
from pyqt5.qtwidgets import qdialog,qapplication

from ui_findandreplacedlg import ui_findandreplacedlg


class findandreplacedlg(qdialog, ui_findandreplacedlg):
  """
  class documentation goes here.
  """
  find = pyqtsignal(str,bool,bool,bool,bool,bool)
  replace = pyqtsignal(str,str,bool,bool,bool,bool,bool)   
  def __init__(self, parent=none):
    """
    constructor

    @param parent reference to the parent widget
    @type qwidget
    """
    super(findandreplacedlg, self).__init__(parent)
    self.setupui(self)
    self.moreframe.hide()
    #self.layout().setsizeconstraint(qlayout.setfixedsize)
    self.updateui()    

  @pyqtslot(str)
  def on_findlineedit_textedited(self, text):
    """
    slot documentation goes here.

    @param p0 description
    @type str
    """
    # todo: not implemented yet
    self.updateui()

  @pyqtslot()
  def on_findbutton_clicked(self):
    self.find.emit(self.findlineedit.text(),
            self.casecheckbox.ischecked(),
            self.wholecheckbox.ischecked(),
            self.backwardscheckbox.ischecked(),
            self.regexcheckbox.ischecked(),
            self.ignorenotescheckbox.ischecked())    


  @pyqtslot()
  def on_replacebutton_clicked(self):
    self.replace.emit(self.findlineedit.text(),
             self.replacelineedit.text(),
             self.casecheckbox.ischecked(),
             self.wholecheckbox.ischecked(),
             self.backwardscheckbox.ischecked(),
             self.regexcheckbox.ischecked(),
             self.ignorenotescheckbox.ischecked())

  def updateui(self):
    enable = self.findlineedit.text()
    self.findbutton.setenabled(bool(enable))
    self.replacebutton.setenabled(bool(enable))

if __name__ == "__main__":
  import sys

  def find(what, *args):
    print("find {0} {1}".format(what, [x for x in args]))

  def replace(old, new, *args):
    print("replace {0} with {1} {2}".format(
       old, new, [x for x in args]))

  app = qapplication(sys.argv)
  form = findandreplacedlg()
  form.find.connect(find)
  form.replace.connect(replace)
  form.show()
  app.exec_()

运行结果：

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