/**
@mainpage The KDevelop Designer Integration Support Library

This library contains base classes to implement GUI designer integration in language support plugins.

<b>Link with</b>: -ldesignerintegration

<b>Include path</b>: -I\$(kde_includes)/languages/designer_integration

\section usingintegration Using designer integration support library
Each language support which wants to use integrated designer, must reimplement 
@code
virtual TDevDesignerIntegration *TDevLanguageSupport::designer(KInterfaceDesigner::DesignerType type)
@endcode
method and return designer integration object (@ref TDevLanguageSupport base class returns 0).

Qt designer integration can be easily implemented by reusing @ref QtDesignerIntegration
base class.

For example, designer method of a language support could look like:
@code
TDevDesignerIntegration * MyLanguageSupportPart::designer(KInterfaceDesigner::DesignerType type)
{
    TDevDesignerIntegration *des = 0;
    switch (type)
    {
        case KInterfaceDesigner::QtDesigner:
            des = m_designers[type];
            if (des == 0)
            {
                MyLanguageImplementationWidget *impl = new MyLanguageImplementationWidget(this);
                des = new MyLanguageQtDesignerIntegration(this, impl);
                m_designers[type] = des;
            }
            break;
    }
    return des;
}
return des;
@endcode
In the code above m_designers is a designer cache declared as:
@code
QMap<KInterfaceDesigner::DesignerType, TDevDesignerIntegration*> m_designers;
@endcode
MyLanguageImplementationWidget and MyLanguageQtDesignerIntegration classes are subclasses
of @ref QtDesignerIntegration and @ref ImplementationWidget base classes.
*/