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#ifndef __kregexpeditorinterface_h__
#define __kregexpeditorinterface_h__
#include <tqstring.h>
/**
* A graphical editor for regular expressions.
*
* @author Jesper K. Pedersen blackie@kde.org
*
* The actual editor is located in kdeutils, with an interface in
* kdelibs. This means that it is a bit more complicated to create an
* instance of the editor, but only a little bit more complicated.
*
* To check if kregexpeditor in kdeutils is installed and available use this line:
*
* \code
* bool installed=!KTrader::self()->query("KRegExpEditor/KRegExpEditor").isEmpty();
* \endcode
*
* The following is a template for what you need to do to create an instance of the
* regular expression dialog:
*
* \code
* TQDialog *editorDialog = KParts::ComponentFactory::createInstanceFromQuery<TQDialog>( "KRegExpEditor/KRegExpEditor" );
* if ( editorDialog ) {
* // kdeutils was installed, so the dialog was found fetch the editor interface
* KRegExpEditorInterface *editor = ::tqqt_cast<KRegExpEditorInterface *>( editorDialog );
* Q_ASSERT( editor ); // This should not fail!
*
* // now use the editor.
* editor->setRegExp("^kde$");
*
* // Finally exec the dialog
* editorDialog->exec();
* }
* else {
* // Don't offer the dialog.
* }
* \endcode
*
* Note: signals and slots must be connected to the editorDialog object, not to the editor object:
* \code
* connect( editorDialog, TQT_SIGNAL( canUndo( bool ) ), undoBut, TQT_SLOT( setEnabled( bool ) ) );
* \endcode
*
* If you want to create an instance of the editor widget, i.e. not the
* dialog, then you must do it in the following way:
*
* \code
* TQWidget *editorWidget =
* KParts::ComponentFactory::createInstanceFromQuery<TQWidget>(
* "KRegExpEditor/KRegExpEditor", TQString::null, parent );
* if ( editorWidget ) {
* // kdeutils was installed, so the widget was found fetch the editor interface
* KRegExpEditorInterface *editor = ::tqqt_cast<KRegExpEditorInterface *>( editorWidget );
* Q_ASSERT( editor ); // This should not fail!
*
* // now use the editor.
* editor->setRegExp("^kde$");
* // Finally insert the widget into the layout of its parent
* layout->addWidget( editorWidget );
* }
* else {
* // Don't offer the editor widget.
* }
* \endcode
*
*/
class KRegExpEditorInterface
{
public:
/**
* returns the regular expression of the editor in Qt3 QRegExp
* syntax. Note, there is also a 'regexp' Qt property available.
*/
virtual TQString regExp() const = 0;
protected:
// These are signals: in classes that actually implement the interface.
/**
* This signal tells whether undo is available.
*/
virtual void canUndo( bool ) = 0;
/**
* This signal tells whether redo is available.
*/
virtual void canRedo( bool ) = 0;
/**
* This signal is emited whenever the regular expression changes.
* The argument is true when the regular expression is different from
* the loaded regular expression and false when it is equal to the
* loaded regular expression.
*/
virtual void changes( bool ) = 0;
public:
// These are public slots: in classes that implement the interface.
/**
* Set the regular expression for the editor. The syntax must be Qt3
* TQRegExp syntax.
*/
virtual void setRegExp( const TQString ®exp ) = 0;
virtual void redo() = 0;
virtual void undo() = 0;
/**
* Set text to use when showing matches. NOT IMPLEMENTED YET!
*
* This method is not yet implemented. In later version of the widget
* this method will be used to give the widget a text to show matches of
* the regular expression on.
*/
virtual void setMatchText( const TQString& ) = 0;
/**
* This method allows for future changes that will not break binary
* compatibility. DONT USE!
*
* KDE has a policy of keeping binary compatibility for all major
* version of KDE. This means that new methods can not be added to this
* API before KDE version 4.0.
*
* This method is an escape door for that.
*
* Conclusion: You should not use this method in this version of KDE!
*/
virtual void doSomething( TQString method, void* arguments ) = 0;
};
#endif
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