attaching user data pointer to images in QTextEdit

[Workeml]

Hi,

I'd like to create a QTextEdit subclass in which image icons with some associated data can be included within the text.

To add an image icon and associate data, I'm using QTextFormat::setProperty():

QTextImageFormat textImage;
textImage.setName(myImageName);
QVariant v = qVariantFromValue((void *) myUserDataPtr);
textImage.setProperty(myUserDataPropertyId, v);
QTextCursor tc = textCursor();
tc.insertImage(textImage);

QTextImageFormat textImage;
textImage.setName(myImageName);
QVariant v = qVariantFromValue((void *) myUserDataPtr);
textImage.setProperty(myUserDataPropertyId, v);
QTextCursor tc = textCursor();
tc.insertImage(textImage);

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To retrieve the data for an image icon in the QTextEdit:

QTextFormat format = textCursor.charFormat(); 
if (format.isImageFormat())
{
	if (format.hasProperty(myUserDataPropertyId))
	{
		QVariant v = format.property(myUserDataPropertyId);
		// ...
	}
}

QTextFormat format = textCursor.charFormat(); 
if (format.isImageFormat())
{
	if (format.hasProperty(myUserDataPropertyId))
	{
		QVariant v = format.property(myUserDataPropertyId);
		// ...
	}
}

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This works as long as the image icons are not displaced. If I select a section of text and icons, and drag-and-drop them to a different position within the QTextEdit, the user property seems to get lost.

Is this the expected behaviour or am I doing something wrong? Should I be using a different approach than QTextFormat::setProperty()?