encoderselectiondialog.h

Symbian OS 图片转换程序源代码 可以学习一下

/*
* ============================================================================
*  Name     : CEncoderSelectionDialog from EncoderSelectionDialog.h
*  Part of  : ImageConverter
*  Created  : 25.11.2003 Forum Nokia
*  Description:
*     Used to select encoding format.
*  Version  :
*  Copyright: Nokia Corporation
* ============================================================================
*/


#ifndef __ENCODERSELECTIONDIALOG_H__
#define __ENCODERSELECTIONDIALOG_H__

// INCLUDES
#include <aknview.h>
#include <eikdialg.h>

// FORWARD DECLARATIONS
class CImageConverterEngine;
class CEikTextListBox;

// CLASS DECLARATION

/**
*  Dialog class
*  Test various controls.
*/
class CEncoderSelectionDialog:public CEikDialog
    {
    public: // Constructors and destructor
        /**
        * Constructor
		* @param aImageTypes Image types to choose from.
		* @param sSelectedIdx The selected index is stored here.
        */      
        CEncoderSelectionDialog( 
			RImageTypeDescriptionArray& aImageTypes, 
			TInt& aSelectedIdx );
        
		/**
		* Destructor
		*/
		~CEncoderSelectionDialog();

	public: // from base classes
        /**
        * From CAknDialog set parameters before showing dialog.
        */
        void PreLayoutDynInitL();
		
		void PostLayoutDynInitL();

		/**
		* From CCoeControl. Pass key events to contained listbox.
		*/
		TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,
			TEventCode aType);

        /**
        * From CAknDialog update member variables of CAknExEditorDialog.
        * @param aButtonId The ID of the button that was activated.
        * @return Should return ETrue if the dialog should exit,
        *    and EFalse if it should not
        */
        TBool OkToExitL(TInt aButtonId);

	private: // from base classes
		/**
        * From CoeControl,CountComponentControls.
        */
        TInt CountComponentControls() const;

       /**
        * From CCoeControl,ComponentControl.
        */
        CCoeControl* ComponentControl(TInt aIndex) const;

    
	private: // data

		/*! @var iImageTypes the image types to choose from. */
		RImageTypeDescriptionArray& iImageTypes;

		/*! @var iSelectedIdx the selected index from image types */
		TInt& iSelectedIdx;
	
		/*! @var iListBox the control used to display the results */
	    CEikTextListBox* iListBox;

		/*! @var iMessageList the list of messages to display */
		CDesCArrayFlat* iMessageList;

    };

#endif //__ENCODERSELECTIONDIALOG_H__