Python PyQt4 функции для сохранения и восстановления значений виджета пользовательского интерфейса?

Прежде чем я попытаюсь написать свои собственные функции модуля Python PyQt4... Я хотел спросить, есть ли у кого такая функция для обмена.

Во многих моих программах python, где у меня есть графический интерфейс, построенный с использованием PyQt4 и qtDesigner, я использую метод QSettings для сохранения и восстановления состояний пользовательского интерфейса и значений всех виджетов во время закрытия и запуска.

В этом примере показано, как я сохраняю и восстанавливаю некоторые поля lineEdit, checkBox и radioButton.

Есть ли у кого-нибудь функция, которая может пересекать пользовательский интерфейс и находить ВСЕ виджеты/элементы управления и их состояния и сохранять их (например, guisave()) и другую функцию, которая может их восстановить (например, guirestore())?

My closeEvent выглядит примерно так:

#---------------------------------------------
# close by x OR call to self.close
#---------------------------------------------

def closeEvent(self, event):      # user clicked the x or pressed alt-F4...

    UI_VERSION = 1   # increment this whenever the UI changes significantly

    programname = os.path.basename(__file__)
    programbase, ext = os.path.splitext(programname)  # extract basename and ext from filename
    settings = QtCore.QSettings("company", programbase)    
    settings.setValue("geometry", self.saveGeometry())  # save window geometry
    settings.setValue("state", self.saveState(UI_VERSION))   # save settings (UI_VERSION is a constant you should increment when your UI changes significantly to prevent attempts to restore an invalid state.)

    # save ui values, so they can be restored next time
    settings.setValue("lineEditUser", self.lineEditUser.text());
    settings.setValue("lineEditPass", self.lineEditPass.text());

    settings.setValue("checkBoxReplace", self.checkBoxReplace.checkState());
    settings.setValue("checkBoxFirst", self.checkBoxFirst.checkState());

    settings.setValue("radioButton1", self.radioButton1.isChecked());

    sys.exit()  # prevents second call

My MainWindow init выглядит примерно так:

def __init__(self, parent = None):
    # initialization of the superclass
    super(QtDesignerMainWindow, self).__init__(parent)
    # setup the GUI --> function generated by pyuic4
    self.setupUi(self)

    #---------------------------------------------
    # restore gui position and restore fields
    #---------------------------------------------

    UI_VERSION = 1

    settings = QtCore.QSettings("company", programbase)    # http://pyqt.sourceforge.net/Docs/PyQt4/pyqt_qsettings.html

    self.restoreGeometry(settings.value("geometry"))
    self.restoreState(settings.value("state"),UI_VERSION) 

    self.lineEditUser.setText(str(settings.value("lineEditUser")))  # restore lineEditFile
    self.lineEditPass.setText(str(settings.value("lineEditPass")))  # restore lineEditFile

    if settings.value("checkBoxReplace") != None:
        self.checkBoxReplace.setCheckState(settings.value("checkBoxReplace"))   # restore checkbox
    if settings.value("checkBoxFirst") != None:
        self.checkBoxFirst.setCheckState(settings.value("checkBoxFirst"))   # restore checkbox

    value = settings.value("radioButton1").toBool()
    self.ui.radioButton1.setChecked(value)

ОТВЕТЫ

Ответ 1

ОК, я написал модуль с 2 функциями, чтобы делать то, о чем я просил. На самом деле это не так сложно, как только я это понял, но он действительно экономит много времени, когда вы создаете новые программы guq pyqt, где вы хотите сохранить значения полей виджета между сеансами. Я в настоящее время только поля LineEdit, checkBox и поля combobox закодированы. Если кто-то хочет добавить или улучшить (например, радиокнопки... и т.д.)... Я уверен, что другие, включая меня, оценят это.

#===================================================================
# Module with functions to save & restore qt widget values
# Written by: Alan Lilly 
# Website: http://panofish.net
#===================================================================

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

#===================================================================
# save "ui" controls and values to registry "setting"
# currently only handles comboboxes editlines & checkboxes
# ui = qmainwindow object
# settings = qsettings object
#===================================================================

def guisave(ui, settings):

    #for child in ui.children():  # works like getmembers, but because it traverses the hierarachy, you would have to call guisave recursively to traverse down the tree

    for name, obj in inspect.getmembers(ui):
        #if type(obj) is QComboBox:  # this works similar to isinstance, but missed some field... not sure why?
        if isinstance(obj, QComboBox):
            name   = obj.objectName()      # get combobox name
            index  = obj.currentIndex()    # get current index from combobox
            text   = obj.itemText(index)   # get the text for current index
            settings.setValue(name, text)   # save combobox selection to registry

        if isinstance(obj, QLineEdit):
            name = obj.objectName()
            value = obj.text()
            settings.setValue(name, value)    # save ui values, so they can be restored next time

        if isinstance(obj, QCheckBox):
            name = obj.objectName()
            state = obj.checkState()
            settings.setValue(name, state)

#===================================================================
# restore "ui" controls with values stored in registry "settings"
# currently only handles comboboxes, editlines &checkboxes
# ui = QMainWindow object
# settings = QSettings object
#===================================================================

def guirestore(ui, settings):

    for name, obj in inspect.getmembers(ui):
        if isinstance(obj, QComboBox):
            index  = obj.currentIndex()    # get current region from combobox
            #text   = obj.itemText(index)   # get the text for new selected index
            name   = obj.objectName()

            value = unicode(settings.value(name))  

            if value == "":
                continue

            index = obj.findText(value)   # get the corresponding index for specified string in combobox

            if index == -1:  # add to list if not found
                obj.insertItems(0,[value])
                index = obj.findText(value)
                obj.setCurrentIndex(index)
            else:
                obj.setCurrentIndex(index)   # preselect a combobox value by index    

        if isinstance(obj, QLineEdit):
            name = obj.objectName()
            value = unicode(settings.value(name))  # get stored value from registry
            obj.setText(value)  # restore lineEditFile

        if isinstance(obj, QCheckBox):
            name = obj.objectName()
            value = settings.value(name)   # get stored value from registry
            if value != None:
                obj.setCheckState(value)   # restore checkbox

        #if isinstance(obj, QRadioButton):                

################################################################

if __name__ == "__main__":

    # execute when run directly, but not when called as a module.
    # therefore this section allows for testing this module!

    #print "running directly, not as a module!"

    sys.exit()

Ответ 2

Здесь обновленный фрагмент, изначально принадлежащий mr. Panofish. Эти прекрасные функции такие же, но теперь они могут быть использованы на любых версиях PyQt и Python с небольшими изменениями, если это необходимо. спасибо mr. Panofish, долго жить OpenSource!:)

Изменения:

  • Обновлено для Python3 и PyQt5
  • Добавлена ​​геометрия save\restore
  • Добавлен QRadioButton save\restore

  • SetCheckState() заменен SetChecked(), чтобы избежать tristate

    def guisave(self):

  # Save geometry
    self.settings.setValue('size', self.size())
    self.settings.setValue('pos', self.pos())

    for name, obj in inspect.getmembers(ui):
      # if type(obj) is QComboBox:  # this works similar to isinstance, but missed some field... not sure why?
      if isinstance(obj, QComboBox):
          name = obj.objectName()  # get combobox name
          index = obj.currentIndex()  # get current index from combobox
          text = obj.itemText(index)  # get the text for current index
          settings.setValue(name, text)  # save combobox selection to registry

      if isinstance(obj, QLineEdit):
          name = obj.objectName()
          value = obj.text()
          settings.setValue(name, value)  # save ui values, so they can be restored next time

      if isinstance(obj, QCheckBox):
          name = obj.objectName()
          state = obj.isChecked()
          settings.setValue(name, state)

      if isinstance(obj, QRadioButton):
          name = obj.objectName()
          value = obj.isChecked()  # get stored value from registry
          settings.setValue(name, value)


def guirestore(self):

  # Restore geometry  
  self.resize(self.settings.value('size', QtCore.QSize(500, 500)))
  self.move(self.settings.value('pos', QtCore.QPoint(60, 60)))

  for name, obj in inspect.getmembers(ui):
      if isinstance(obj, QComboBox):
          index = obj.currentIndex()  # get current region from combobox
          # text   = obj.itemText(index)   # get the text for new selected index
          name = obj.objectName()

          value = (settings.value(name))

          if value == "":
              continue

          index = obj.findText(value)  # get the corresponding index for specified string in combobox

            if index == -1:  # add to list if not found
                obj.insertItems(0, [value])
                index = obj.findText(value)
                obj.setCurrentIndex(index)
            else:
                obj.setCurrentIndex(index)  # preselect a combobox value by index

      if isinstance(obj, QLineEdit):
          name = obj.objectName()
          value = (settings.value(name).decode('utf-8'))  # get stored value from registry
          obj.setText(value)  # restore lineEditFile

      if isinstance(obj, QCheckBox):
          name = obj.objectName()
          value = settings.value(name)  # get stored value from registry
          if value != None:
              obj.setChecked(strtobool(value))  # restore checkbox

      if isinstance(obj, QRadioButton):
         name = obj.objectName()
         value = settings.value(name)  # get stored value from registry
         if value != None:
             obj.setChecked(strtobool(value))

Ответ 3

спасибо Панофиш и все Я добавляю некоторое обновление для QSlider/QSpinBox. он маленький и простой.

в guisave вы можете добавить:

if isinstance(obj, QSpinBox):
    name  = obj.objectName()
    value = obj.value()             # get stored value from registry
    settings.setValue(name, value)

if isinstance(obj, QSlider):
    name  = obj.objectName()
    value = obj.value()             # get stored value from registry
    settings.setValue(name, value)

в guirestore вы можете добавить:

if isinstance(obj, QSlider):
    name = obj.objectName()
    value = settings.value(name)    # get stored value from registry
    if value != None:           
        obj. setValue(int(value))   # restore value from registry

if isinstance(obj, QSpinBox):
    name = obj.objectName()
    value = settings.value(name)    # get stored value from registry
    if value != None:
        obj. setValue(int(value))   # restore value from registry

Ответ 4

Я добавляю обновление для QListWidget.

В guisave:

if isinstance(obj, QListWidget):
    name = obj.objectName()
    settings.beginWriteArray(name)
    for i in range(obj.count()):
        settings.setArrayIndex(i)
        settings.setValue(name, obj.item(i).text())
    settings.endArray()

в guirestore:

if isinstance(obj, QListWidget):
    name = obj.objectName()
    size = settings.beginReadArray(name)
    for i in range(size):
        settings.setArrayIndex(i)
        value = settings.value(name)  # get stored value from registry
        if value != None:
            obj.addItem(value)
    settings.endArray()

Ответ 5

Я нашел эти ответы полезными, поэтому я решил собрать их вместе и опубликовать версию (для PySide2/Qt5) с удаленным дублированием и именем для группировки настроек в.

from PySide2.QtWidgets import *
import inspect

def GetHandledTypes():
    return (QComboBox, QLineEdit, QCheckBox, QRadioButton, QSpinBox, QSlider, QListWidget)

def IsHandledType(widget):
    return any(isinstance(widget, t) for t in GetHandledTypes())

#===================================================================
# save "ui" controls and values to registry "setting"
#===================================================================

def GuiSave(ui : QWidget, settings : QSettings, uiName="uiwidget"):
    namePrefix = f"{uiName}/"
    settings.setValue(namePrefix + "geometry", ui.saveGeometry())

    for name, obj in inspect.getmembers(ui):
        if not IsHandledType(obj):
            continue

        name = obj.objectName()
        value = None
        if isinstance(obj, QComboBox):
            index = obj.currentIndex()  # get current index from combobox
            value = obj.itemText(index)  # get the text for current index

        if isinstance(obj, QLineEdit):
            value = obj.text()

        if isinstance(obj, QCheckBox):
            value = obj.isChecked()

        if isinstance(obj, QRadioButton):
            value = obj.isChecked()

        if isinstance(obj, QSpinBox):
            value = obj.value()

        if isinstance(obj, QSlider):
            value = obj.value()

        if isinstance(obj, QListWidget):
            settings.beginWriteArray(name)
            for i in range(obj.count()):
                settings.setArrayIndex(i)
                settings.setValue(namePrefix + name, obj.item(i).text())
            settings.endArray()
        elif value is not None:
            settings.setValue(namePrefix + name, value)

#===================================================================
# restore "ui" controls with values stored in registry "settings"
#===================================================================

def GuiRestore(ui : QWidget, settings : QSettings, uiName="uiwidget"):
    from distutils.util import strtobool

    namePrefix = f"{uiName}/"
    geometryValue = settings.value(namePrefix + "geometry")
    if geometryValue:
        ui.restoreGeometry(geometryValue)

    for name, obj in inspect.getmembers(ui):
        if not IsHandledType(obj):
            continue

        name = obj.objectName()
        value = None
        if not isinstance(obj, QListWidget):
            value = settings.value(namePrefix + name)
            if value is None:
                continue

        if isinstance(obj, QComboBox):
            index = obj.findText(value)  # get the corresponding index for specified string in combobox

            if index == -1:  # add to list if not found
                obj.insertItems(0, [value])
                index = obj.findText(value)
                obj.setCurrentIndex(index)
            else:
                obj.setCurrentIndex(index)  # preselect a combobox value by index

        if isinstance(obj, QLineEdit):
            obj.setText(value)

        if isinstance(obj, QCheckBox):
            obj.setChecked(strtobool(value))

        if isinstance(obj, QRadioButton):
            obj.setChecked(strtobool(value))

        if isinstance(obj, QSlider):
            obj.setValue(int(value))

        if isinstance(obj, QSpinBox):
            obj.setValue(int(value))

        if isinstance(obj, QListWidget):
            size = settings.beginReadArray(namePrefix + name)
            for i in range(size):
                settings.setArrayIndex(i)
                value = settings.value(namePrefix + name)
                if value is not None:
                    obj.addItem(value)
            settings.endArray()'''