Registering Name Property Hooks

Gantt > Using the Gantt Chart Through Examples > Registering Gantt Data Change Hooks > Registering Name Property Hooks

After have defined the hook function, it must be registered before being called by the Gantt chart object. The registration is based on the Rogue Wave® Views class property feature, in which a property is registered at the class level.

In the Gantt library, the key for allowing the property value to be retrieved is an IlSymbol defined in the IlvGanttChart class:

IlSymbol* IlvGanttChart::nameProperty() const;

where IlSymbol is defined as GanttName. Here is an example of registering the hook function we defined above. You can find this function in <ILVHOME>/samples/gantt/common/src/utils.cpp:

// --------------------------------------------------------------------------

void RegisterGanttNameProperty(IlvGraphic* graphic)

{

// Test if the Gantt name property is added to the IlvGraphic.

IlvGanttSetGraphicName function =

IL_FPTRTOANYCAST(IlvGanttSetGraphicName)

(graphic->getClassProperty(IlvGanttChart::nameProperty(), IlTrue));

if (function)

return;

graphic->AddProperty(IlvGanttChart::nameProperty(), (IlAny)

IL_FPTRTOANYCAST(IlvGanttSetGraphicName)(OnGanttObjectNameChanged));

}

Version 6.0