PySide6.QtDesigner.QDesignerPropertyEditorInterface

class QDesignerPropertyEditorInterface

The QDesignerPropertyEditorInterface class allows you to query and manipulate the current state of Qt Widgets Designer’s property editor. More…

Inheritance diagram of PySide6.QtDesigner.QDesignerPropertyEditorInterface

Synopsis

Methods

Virtual methods

Signals

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description

Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

QDesignerPropertyEditorInterface contains a collection of functions that is typically used to query the property editor for its current state, and several slots manipulating it’s state. The interface also provide a signal, propertyChanged() , which is emitted whenever a property changes in the property editor. The signal’s arguments are the property that changed and its new value.

For example, when implementing a custom widget plugin, you can connect the signal to a custom slot:

propertyEditor = formEditor.propertyEditor()
propertyEditor.propertyChanged.connect(
        self.checkProperty)

Then the custom slot can check if the new value is within the range we want when a specified property, belonging to a particular widget, changes:

def checkProperty(property, value):

    propertyEditor = formEditor.propertyEditor()
    object = propertyeditor.object()
    widget = MyCustomWidget(object)
    if widget and property == aProperty and value != expectedValue:
        {...}

The QDesignerPropertyEditorInterface class is not intended to be instantiated directly. You can retrieve an interface to Qt Widgets Designer’s property editor using the propertyEditor() function. A pointer to Qt Widgets Designer’s current QDesignerFormEditorInterface object (formEditor in the examples above) is provided by the initialize() function’s parameter. When implementing a custom widget plugin, you must subclass the QDesignerCustomWidgetInterface to expose your plugin to Qt Widgets Designer.

The functions accessing the property editor are the core() function that you can use to retrieve an interface to the form editor, the currentPropertyName() function that returns the name of the currently selected property in the property editor, the object() function that returns the currently selected object in Qt Widgets Designer’s workspace, and the isReadOnly() function that returns true if the property editor is write proteced (otherwise false).

The slots manipulating the property editor’s state are the setObject() slot that you can use to change the currently selected object in Qt Widgets Designer’s workspace, the setPropertyValue() slot that changes the value of a given property and the setReadOnly() slot that control the write protection of the property editor.

__init__(parent[, flags={}])
Parameters:

Constructs a property editor interface with the given parent and the specified window flags.

core()
Return type:

QDesignerFormEditorInterface

Returns a pointer to Qt Widgets Designer’s current QDesignerFormEditorInterface object.

abstract currentPropertyName()
Return type:

str

Returns the name of the currently selected property in the property editor.

abstract isReadOnly()
Return type:

bool

Returns true if the property editor is write protected; otherwise false.

See also

setReadOnly()

abstract object()
Return type:

QObject

Returns the currently selected object in Qt Widgets Designer’s workspace.

See also

setObject()

propertyChanged(name, value)
Parameters:

  • name – str

  • value – object

This signal is emitted whenever a property changes in the property editor. The property that changed and its new value are specified by name and value respectively.

abstract setObject(object)
Parameters:

object – QObject

Changes the currently selected object in Qt Widgets Designer’s workspace, to object.

See also

object()

abstract setPropertyValue(name, value[, changed=true])
Parameters:

  • name – str

  • value – object

  • changed – bool

Sets the value of the property specified by name to value.

In addition, the property is marked as changed in the property editor, i.e. its value is different from the default value.

abstract setReadOnly(readOnly)
Parameters:

readOnly – bool

If readOnly is true, the property editor is made write protected; otherwise the write protection is removed.

See also

isReadOnly()