QDesignerPropertyEditorInterface

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

Detailed Description

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 = 0
propertyEditor = formEditor.propertyEditor()
connect(propertyEditor, SIGNAL(propertyChanged(QString,QVariant)),
        self, SLOT(checkProperty(QString,QVariant)))

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 = 0
    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 Designer's property editor using the propertyEditor() function. A pointer to Qt 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 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 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 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.

See also

QDesignerFormEditorInterface

class PySide6.QtDesigner.QDesignerPropertyEditorInterface(parent[, flags={}])

Parameters

• flags – WindowFlags

• parent – PySide6.QtWidgets.QWidget

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

PySide6.QtDesigner.QDesignerPropertyEditorInterface.core()

Return type

PySide6.QtDesigner.QDesignerFormEditorInterface

Returns a pointer to Qt Designer's current QDesignerFormEditorInterface object.

PySide6.QtDesigner.QDesignerPropertyEditorInterface.currentPropertyName()

Return type

str

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

See also

setPropertyValue()

PySide6.QtDesigner.QDesignerPropertyEditorInterface.isReadOnly()

Return type

bool

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

See also

setReadOnly()

PySide6.QtDesigner.QDesignerPropertyEditorInterface.object()

Return type

PySide6.QtCore.QObject

Returns the currently selected object in Qt Designer's workspace.

See also

setObject()

PySide6.QtDesigner.QDesignerPropertyEditorInterface.propertyChanged(name, value)

Parameters

• name – str

• value – object

PySide6.QtDesigner.QDesignerPropertyEditorInterface.setObject(object)

Parameters

object – PySide6.QtCore.QObject

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

See also

object()

PySide6.QtDesigner.QDesignerPropertyEditorInterface.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.

See also

currentPropertyName() propertyChanged()

PySide6.QtDesigner.QDesignerPropertyEditorInterface.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()