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

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()'''