[SOLVED] How to find out about "read only properties"

[3dch]

I try to populate a QObject descendant with the properties of another QObject descendant to have them identical (for example set a QTreeView to have the same property values as another QTreeView). Retrieving all properties poses no problems:

QStringList properties;
 
for(int i = 0; i < myTreeView->propertyCount(); ++i)
    properties << QString::fromLatin1(myTreeView->property(i).name());

QStringList properties;

for(int i = 0; i < myTreeView->propertyCount(); ++i)
    properties << QString::fromLatin1(myTreeView->property(i).name());

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When applying the properties to another object I do verify that a property exists like this:

const  QMetaObject* moOtherTreeView = otherTreeView->metaObject();
 
...
 
QByteArray propName = properties[ix].toLatin1();
 
// Make sure prop exists
 
if (moOtherTreeView->indexOfProperty(propName) < 0)
    continue;    // ignore this property
 
...
 
// Ok, apply property
 
otherTreeView->setProperty(propName, myTreeView->property(propName));

const  QMetaObject* moOtherTreeView = otherTreeView->metaObject();

...

QByteArray propName = properties[ix].toLatin1();

// Make sure prop exists

if (moOtherTreeView->indexOfProperty(propName) < 0)
    continue;    // ignore this property

...

// Ok, apply property

otherTreeView->setProperty(propName, myTreeView->property(propName));

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But unfortunately some of the properties are read only, which is reported by Qt in the debug output:

...
 
updatesEnabled
visible
minimized
QTreeView::setProperty: Property "minimized" invalid, read-only or does not exist
maximized
QTreeView::setProperty: Property "maximized" invalid, read-only or does not exist
fullScreen
QTreeView::setProperty: Property "fullScreen" invalid, read-only or does not exist
sizeHint
 
...

...

updatesEnabled
visible
minimized
QTreeView::setProperty: Property "minimized" invalid, read-only or does not exist
maximized
QTreeView::setProperty: Property "maximized" invalid, read-only or does not exist
fullScreen
QTreeView::setProperty: Property "fullScreen" invalid, read-only or does not exist
sizeHint

...

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My question now is how to find out whether a property is read only or not?

thanks for any reply!
Ernst

[SABROG]

Try checkout return value
bool QObject::setProperty ( const char * name, const QVariant & value )

or

QMetaProperty QMetaObject::property ( int index ) const
bool QMetaProperty::isWritable () const

QMetaProperty QMetaObject::property ( int index ) const
bool QMetaProperty::isWritable () const

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[3dch]

Thank you, SABROG

The isWritable() method perfectly solves my problem (next time I should have a deeper look at the Qt docs).

Regards
Ernst