/*

* Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

* which accompanies this distribution, and is available

* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#if !defined(__EIKMFNE_H__)

#define __EIKMFNE_H__

#if !defined(__EIKBCTRL_H__)

#include <eikbctrl.h>

#endif

#if !defined(__COEDEF_H__)

#include <coedef.h>

#endif

#if !defined(__COEINPUT_H__)

#include <coeinput.h>

#endif

// For MEikCalendarObserver

#if !defined(__EIKCAL_H__)

#include <eikcal.h>	

#endif

#if !defined(__EIKDEF_H__)

#include <eikdef.h>

#endif

#if !defined(__BABITFLAGS_H__)

#include <babitflags.h>

#endif

// For MAknMfneCommandObserver

#if !defined(__AKNMFNECOMMANDOBSERVER)

#include <AknMfneCommandObserver.h>

#endif //!defined(__AKNMFNECOMMANDOBSERVER)

//

// Forward Declarations

//

class CEikonEnv;

class CTimeEditor;

class CDateEditor;

// Skin-related API forward declarations

class MAknsControlContext;

// Extension object within CEikMfne

class CEikMfneExtension;

//

/**

 * Abstract base class for fields within a multi-field numeric editor.

 */

class CEikMfneField : public CBase

	{

public:

    /**

     * The type of highlight.

     */

	enum THighlightType

		{

		/** Inverse video. */

		EInverseVideo,

		/** The cursor is visible in the field so that highlighting is not used. */

		ECursor

		};

protected:

    /**

     * Protected default constructor.

     *

     * Sets the minimum width of the field to zero pixels.

     */

	IMPORT_C CEikMfneField();

public:

	void Draw(CWindowGc& aGc, const CFont& aFont, const TPoint& aTopLeft) const;

	TInt WidthInPixels(const CFont& aFont) const;

	TInt DistanceFromStartOfFieldToEndOfTextInPixels(const CFont& aFont) const;

    /**

     * An implementation of this pure virtual function should

     * get the field's maximum width in pixels.

     *

     * @param aFont The font.

     * @param aShrinkToMinimumSize ETrue to shrink the width to the minimum required.

     * @return The field's maximum width in pixels.

     */

	virtual TInt MaximumWidthInPixels(const CFont& aFont, TBool aShrinkToMinimumSize)=0;

    /**

     * An implementation of this pure virtual function should

     * return the field's input capabilities.

     *

     * @return The field's input capabilities.

     */

	virtual TCoeInputCapabilities InputCapabilities() const=0;

	/**

	 * Derived classes' implementation of function should

	 * return whether the field is editable.

	 *

	 * This implementation returns EFalse.

	 *

	 * @return EFalse.

     */

	IMPORT_C virtual TBool IsEditable() const;

	/**

	 * Derived classes' implementation of function should

	 * return whether the field is valid

	 *

	 * This implementation returns ETrue.

	 *

	 * @return ETrue.

     */	

	IMPORT_C virtual TBool IsValid() const;

	/**

	 * An implementation of this function should get the

	 * field's highlight type.

     * 

     * May only be called if IsEditable() returns ETrue.

     * 

     * This implementation panics in debug builds and returns

     * a dummy value in release builds.

     *

     * @return EInverseVideo.

     */

	IMPORT_C virtual THighlightType HighlightType() const;

	/**

	 * An implementation of this function should handle a key event.

     *

     * May only be called if IsEditable() returns ETrue.

     * This implementation panics in debug builds and is

     * empty in release builds.

     *

     * @param aFont The control's font.

     * @param aKeyEvent The key event passed on from the multi-field numeric editor.

     * @param aInterpretLeftAndRightAsEarEvents Not used. 

     * @param aDataAltered On return, indicates whether or not the field

     *                     contents changed. If EFalse, left and right arrow

     *                     key presses indicate a movement to the preceding of

     *                     following field, if ETrue they are ignored.

     * @param aHighlightIncrement On return: -1 indicates the previous field is

     *                            highlighted,0 indicates the highlight is

     *                            unchanged and 1 indicates the following field

     *                            is highlighted.

     */

	IMPORT_C virtual void HandleKey(const CFont& aFont, const TKeyEvent& aKeyEvent, TBool aInterpretLeftAndRightAsEarEvents, TBool& aDataAltered, TInt& aHighlightIncrement);

 	/**

 	* An implementation of this function should

 	* handle de-highlighting the field.

    *

    * May only be called if IsEditable() returns ETrue.

    *

    * This implementation panics in debug builds and is empty

    * in release builds.

    * 

    * @param aFont The control's font.

    * @param aEikonEnv The control's environment.

    * @param aDataAltered On return, set to ETrue if the function caused

    *                     the field's contents to change, otherwise unchanged.

    * @param aError On return, changed to ETrue if an error occurred e.g.

    *               the user entered an invalid value, otherwise unchanged.

    */

	IMPORT_C virtual void HandleDeHighlight(const CFont& aFont, CEikonEnv& aEikonEnv, TBool& aDataAltered, TBool& aError);

	const TDesC& FieldText() const;

protected:

    /**

     * Handles a left or right arrow key press.

     *

     * @param aKey Left or right arrow key: either EKeyLeftArrow or EKeyRightArrow. 

     * @param aDataAltered On return, ETrue if data is altered as a result of this function.

     * @param aHighlightIncrement On return, the direction to move the cursor:

     *                            either -1 if aKey is a left arrow key, or 1 if aKey is a right arrow key.

     * @panic 3 In debug builds, if aKey is neither a left nor a right arrow key.

     */

	IMPORT_C void HandleLeftOrRightArrow(TChar aKey, TBool& aDataAltered, TInt& aHighlightIncrement);

    TInt AdditionalWidthForHighlights(const CFont& aFont) const;

private:

	virtual const TDesC& Text() const=0;

protected:

    /**

     * The field's minimum width in pixels.

     */

	TInt iMinimumWidthInPixels;

	};

//

/**

 * A separator field for a multi-field numeric editor.

 *

 * For instance, the character that separates time or date components.

 */

NONSHARABLE_CLASS(CEikMfneSeparator) : public CEikMfneField

	{

private:

	CEikMfneSeparator(HBufC* aText);

public:

    /**

     * Destructor.

     *

     * Deletes the separator text that is owned by the object.

     */

	IMPORT_C virtual ~CEikMfneSeparator();

	/**

	 * Allocates and constructs a CEikMfneSeparator from resource.

     * 

     * Uses an MFNE_SEPARATOR resource.

     * 

     * @param aResourceReader The resource reader to use.

     * @return A newly constructed separator field.

     */

	IMPORT_C static CEikMfneSeparator* NewL(TResourceReader& aResourceReader);

	/**

	 * Allocates and constructs a separator.

     *

     * @param aText The separator's text. Ownership of aText is transferred.

     * @return A newly constructed separator.

     */

	IMPORT_C static CEikMfneSeparator* NewL(HBufC* aText); // ownership of aText is transferred when everything that can leave has successfully been done

	/**

	 * Sets the separator's text.

     *

     * This function transfers ownership of the text and can only be called if the field's text was previously NULL.

     * 

     * @param aText The separator's text.

     * @panic 4 If the separator's text was not previously Null.

     */

	IMPORT_C void SetText(HBufC* aText); // allows later transfer of ownership of text - can only be called if aText was previously NULL

private: // framework

	virtual TInt MaximumWidthInPixels(const CFont& aFont, TBool aShrinkToMinimumSize);

	virtual TCoeInputCapabilities InputCapabilities() const;

	virtual const TDesC& Text() const;

private:

	HBufC* iText;

	};

//

/**

 * A number field within a multi-field numeric editor.

 */

NONSHARABLE_CLASS(CEikMfneNumber) : public CEikMfneField

	{

public:

    /**

     * Flags for the number field.

     *

     * EFillWithLeadingZeros, EPreserveOldWidthBeforeEditing and ERepresentsYear can only be set if EPublicallySettableFlags is set.

     */

	enum

		{

		/** Prepends the number field's value with leading zeros up to the maximum allowable width of the field. */

		EFillWithLeadingZeros			=0x1,

		/** The field's minimum width in pixels is set to the current text's width in pixels. */

		EPreserveOldWidthBeforeEditing	=0x2,

		/** The number is a year. */

		ERepresentsYear					=0x4,

		/** Used internally to make sure only the previous three values are set. */

		EPublicallySettableFlags		=EFillWithLeadingZeros|EPreserveOldWidthBeforeEditing|ERepresentsYear

		};

private:

	enum

		{

		EIsBeingEditedWithCursor		=0x8,

		EIsUninitialised				=0x10,

		EFillWithTrailingZeros          =0x20

		};

private:

	CEikMfneNumber(TInt aMinimumValue, TInt aMaximumValue, TUint32 aFlags);

	void ConstructL();

public:

    /**

     * Destructor.

     *

     * Deletes the number field's text.

     */

	IMPORT_C virtual ~CEikMfneNumber();

	/**

	 * Allocates and constructs a CEikMfneNumber from resource.

     *

     * Obtains flags and the minimum and maximum values from an MFNE_NUMBER resource. Then calls the overloaded NewL() function.

     *

     * @param aFont The font to use.

     * @param aResourceReader The resource reader to use.

     * @return A newly constructed number field.

	 */

	IMPORT_C static CEikMfneNumber* NewL(const CFont& aFont, TResourceReader& aResourceReader);

    /**

     * Allocates and constructs a CEikMfneNumber with the specified parameters.

     *

     * @param aFont The font to use.

     * @param aMinimumValue The minimum value.

     * @param aMaximumValue The maximum value.

     * @param aInitialValue The initial value. This must be greater than the minimum value and less than the maximum value.

     * @param aFlags The number field's flags. See the Anonymous enum.

     * @return A newly constructed number field.

     * @panic 8 If the initial value is not greater than or equal to the minimum value and less than or equal to the maximum value.

     */

	IMPORT_C static CEikMfneNumber* NewL(const CFont& aFont, TInt aMinimumValue, TInt aMaximumValue, TInt aInitialValue, TUint32 aFlags);

	/**

	 * Sets the minimum and maximum allowable values.

     *

     * @param aMinimumValue The minimum value. Must be less than or equal to the maximum value.

     * @param aMaximumValue The maximum value.

     * @param aFont The font in use.

     * @panic 9 If the minimum value is greater than the maximum value or if the minimum/maximum text length is greater than the maximum number of digits.

     */

	IMPORT_C void SetMinimumAndMaximum(TInt aMinimumValue, TInt aMaximumValue, const CFont& aFont); // only values inside the initial minimum and maximum are permitted

	/**

	 * Gets the minimum and maximum allowable values.

	 *

	 * @param aMinimumValue On return, the minimum allowable value.

	 * @param aMaximumValue On return, the maximum allowable value.

     */

	IMPORT_C void GetMinimumAndMaximum(TInt& aMinimumValue, TInt& aMaximumValue) const;

	/** 

	 * Sets the field's current value.

     * @param aValue The field's current value. This must be between the minimum value and the maximum value.

     * @param aFont The font.

     * @panic 11 In debug builds only, if the value is less than the minimum value or greater than the maximum value.

     */

	IMPORT_C void SetValue(TInt aValue, const CFont& aFont);

 	/**

 	 * Gets the number field's value. Note that this function will leave

 	 * if the value is not valid, i.e. the number of digits is zero

 	 * or the value is outside of the minimum and maximum range.

     *

     * @return The field's value.

     */

	IMPORT_C TInt Value() const;

    /**

	 * Returns ETrue if the field contains more than zero

	 * digits.

     *

	 * @return ETrue if the field contains more than zero digits.

     */	

	IMPORT_C virtual TBool IsValid() const;

    /**

     * Sets the uninitialized status of the field.

     * 

     * @param aUninitialised If ETrue, sets the field as uninitialized,

     *                       i.e. it doesn't display anything.

     */

	IMPORT_C void SetUninitialised(TBool aUninitialised);

	/**

	 * Gets the uninitialized status of the field.

	 * 

	 * @return ETrue, if the field is set as uninitialized.

	 */

	IMPORT_C TBool IsUninitialised() const;

public:

    /**

     * Sets the digit display type.

     *

     * @since S60 v3.1

     * @param aDigitType The digit display type to bet set for this number field

     * @param aFont The font of the MFNE that owns this field, usually retrieved with CEikMfne::Font()

     */

	IMPORT_C void SetDigitType(TDigitType aDigitType, const CFont& aFont);

    /**

     * Gets the digit display type.

     *

     * @since S60 v3.1

     * @return The digit display type of this number field

     */

	IMPORT_C TDigitType DigitType() const;

	/**

	 * Derive and set digit display type from locale information.

	 *

	 * @since S60 v3.1

	 * @param aFont The font of the MFNE that owns this field, usually retrieved with CEikMfne::Font()

	 */

	IMPORT_C void RefreshDigitType(const CFont& aFont);

	void SetTrailingZeros();

public:

	TBool IsTextNull() const;

private: // framework

	virtual TInt MaximumWidthInPixels(const CFont& aFont, TBool aShrinkToMinimumSize);

	virtual TCoeInputCapabilities InputCapabilities() const;

	virtual TBool IsEditable() const;

	virtual THighlightType HighlightType() const;

	virtual void HandleKey(const CFont& aFont, const TKeyEvent& aKeyEvent, TBool aInterpretLeftAndRightAsEarEvents, TBool& aDataAltered, TInt& aHighlightIncrement);

	virtual void HandleDeHighlight(const CFont& aFont, CEikonEnv& aEikonEnv, TBool& aDataAltered, TBool& aError);

	virtual const TDesC& Text() const;

private:

	TInt MaximumNumberOfDigits() const;

	TInt NumberOfDigits() const;

	void SetTextToValue(TInt aValue, const CFont& aFont);

	TInt ValueFromText() const;

	TBool ConvertsIntoValidValue(TInt& aValue) const;

private: // International digit support

	TChar NormalizeDigit(TChar aChar);

	TText ZeroCharacter() const;

	TText NegativeCharacter() const;

private:

	TInt iMinimumValue;

	TInt iMaximumValue;

	TInt iMaxDigits;

	TUint32 iFlags;

	HBufC* iText;

	TChar iNudgeCharMinus;

	TChar iNudgeCharPlus;

	TInt iMaxDigitsMinimumValue;

    TInt iMaxDigitsMaximumValue;

	TDigitType	iDigitType;

	};

//

/**

 * A symbol field for a multi-field numeric editor.

 *

 * For instance, the AM / PM text in a time editor. In this case, the field contains 2 symbolic items one each for the AM and PM text strings.

 */

NONSHARABLE_CLASS(CEikMfneSymbol) : public CEikMfneField

	{

public:

    /**

     * An item within a symbol field in an MFNE.

     */

	NONSHARABLE_CLASS(CItem) : public CBase

		{

	private:

		CItem(TInt aId, TChar aKeyToMatch, HBufC* aText);

	public:

	    /**

	     * Destructor.

         *

         * Deletes the item's text.

         */

		IMPORT_C virtual ~CItem();

		/**

		 * Allocates and constructs a symbolic item from resource.

         *

         * Uses a MFNE_SYMBOLIC_ITEM resource.

         * @param aResourceReader The resource reader to use.

         * @return A newly constructed symbolic item.

         */

		IMPORT_C static CItem* NewL(TResourceReader& aResourceReader);

		/**

		 * Allocates and constructs a symbolic item.

         *

         * @param aId The ID of the symbolic item that uniquely identifies the item in the field.

         * @param aKeyToMatch The key that represents the item. This is for character matching, not for display.

         * @param aText The text to be drawn. Ownership of aText is transferred when everything that can leave has successfully completed.

         * @return A newly constructed symbolic item.

         */

		IMPORT_C static CItem* NewL(TInt aId, TChar aKeyToMatch, HBufC* aText); // ownership of aText is transferred when everything that can leave has successfully been done

        /**

         * Sets the symbolic item's text. 

         *