The FilterWidget
class is completed and ready to be used. We now have to register FilterWidget
with the Qt Designer plugin system. This glue code is made using a child class of QDesignerCustomWidgetInterface
.
Create a new C++ class named FilterPluginDesigner
and update FilterPluginDesigner.h
like so:
#include <QtUiPlugin/QDesignerCustomWidgetInterface> class FilterPluginDesigner : public QObject, public QDesignerCustomWidgetInterface { Q_OBJECT Q_PLUGIN_METADATA(IID "org.masteringqt.imagefilter.FilterWidgetPluginInterface") Q_INTERFACES(QDesignerCustomWidgetInterface) public: FilterPluginDesigner(QObject* parent = 0); };
The FilterPlugin
class inherits from two classes:
The
QObject
class, to rely on the Qt parenting systemThe
QDesignerCustomWidgetInterface
class to properly expose theFilterWidget
information to the plugin system
The QDesignerCustomWidgetInterface
class brings two new macros:
The
Q_PLUGIN_METADATA()
macro...