Qt Signal Slot Base Class

1. Qt Connect Signal Slot
2. How Qt Signal And Slots Works
3. Qt Signal Slot Base Classic
4. Qt Signal Slot Performance
5. Qt Signal Slot Base Classification
6. Qt Signals And Slots Tutorial

Signals, slots, QOBJECT, emit, SIGNAL, SLOT. Those are known as the Qt extension to C. Those are known as the Qt extension to C. They are in fact simple macros, defined in qobjectdefs.h. quote All classes that contain signals or slots must mention QOBJECT at the top of their declaration. They must also derive (directly or indirectly) from QObject.

Standard Qt classes¶

Squish test scripts can access methods and members of standard Qt classes.

Custom Qt classes¶

For custom Qt classes, their methods are accessible in test scripts if they have been declared as Qt slots or marked with Q_INVOKABLE. Jewel of india slot machine. In addition properties that have been declared as QObject properties via Q_PROPERTY are available for both verifications and search by name.

Using properties for object name generation¶

Make money playing online craps. Properties declared via Q_PROPERTY can be configured and used by the Squish name generator.

Dynamic properties set via QObject.setProperty() can be queried via QObject.property() but are unfortunately not available as properties and automatic name generation.

Qt Connect Signal Slot

(Also seeObject Name Generation.)

Custom enums¶

In addition, theQ_ENUMSmacro can be used to declare custom enum types to the (Qt) 'moc' tool, which should make them accessible from Squish.

Properties returning QVariant¶

Some Properties in Qt Quick return their value wrapped in QVariants. This is for example most common in the case of the model, for example for listviews. The QVariant itself can be converted to the base class as shown in the example below

The realmodel variable contains the original value if the conversion was successful.

How Qt Signal And Slots Works

Properties returning QVariantMap¶

Assuming the object myObject has a property of type QVariantMap accessing its contents works almost the same way as in Qt. It is only necessary to manually convert the returned QVariant objects to their actual value types. That means calling QVariant::toMap() for example. This is done through Squish'sobject.convertTo(obj, typename)function.

Qt Signal Slot Base Classic

The following code example retrieves a QVariantMap property from myObject and prints all the keys of the map. It works for QVariantMaps where the values are of type QVariant. For different value types, the conversion of valueVariant needs to be adjusted.

Limitations¶

Standard Qt classes¶

Squish test scripts can access methods and members of standard Qt classes.

Custom Qt classes¶

For custom Qt classes, their methods are accessible in test scripts if they have been declared as Qt slots or marked with Q_INVOKABLE. Jewel of india slot machine. In addition properties that have been declared as QObject properties via Q_PROPERTY are available for both verifications and search by name.

Using properties for object name generation¶

Make money playing online craps. Properties declared via Q_PROPERTY can be configured and used by the Squish name generator.

Dynamic properties set via QObject.setProperty() can be queried via QObject.property() but are unfortunately not available as properties and automatic name generation.

Qt Connect Signal Slot

(Also seeObject Name Generation.)

Custom enums¶

In addition, theQ_ENUMSmacro can be used to declare custom enum types to the (Qt) 'moc' tool, which should make them accessible from Squish.

Properties returning QVariant¶

Some Properties in Qt Quick return their value wrapped in QVariants. This is for example most common in the case of the model, for example for listviews. The QVariant itself can be converted to the base class as shown in the example below

The realmodel variable contains the original value if the conversion was successful.

How Qt Signal And Slots Works

Properties returning QVariantMap¶

Assuming the object myObject has a property of type QVariantMap accessing its contents works almost the same way as in Qt. It is only necessary to manually convert the returned QVariant objects to their actual value types. That means calling QVariant::toMap() for example. This is done through Squish'sobject.convertTo(obj, typename)function.

Qt Signal Slot Base Classic

The following code example retrieves a QVariantMap property from myObject and prints all the keys of the map. It works for QVariantMaps where the values are of type QVariant. For different value types, the conversion of valueVariant needs to be adjusted.

Limitations¶

Qt Signal Slot Performance

Please note that template based return types are not supported and the respective property or slot will not be listed in the Properties or Methods views in the Squish IDE.

Qt Signal Slot Base Classification

A possible workaround can be to return an object based on a non template based class.

Qt Signals And Slots Tutorial

Related Information¶