--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extras/converter/Ui/Src/CCnvMainForm.h	Mon Jan 18 20:20:33 2010 +0200
@@ -0,0 +1,395 @@
+/*
+* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0""
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  
+*     An AVKON form class containing popup fields and floating point editors.
+*     Implements the 'Main State' of the application.
+*
+*/
+
+
+
+#ifndef __CCNVMAINFORM_H__
+#define __CCNVMAINFORM_H__
+
+// INCLUDES
+#include <AknForm.h>
+#include <TCnvCategory.h>
+
+//Select Edwin
+#include <eikedwob.h>
+
+
+// FORWARD DECLARATIONS
+class CCnvConverter;
+class CAknPopupField;
+class CErrorUI;
+
+// CLASS DEFINITION
+/**
+* An AVKON form class containing popup fields and floating point editors.
+* Implements the 'Main State' of the application.
+*/
+class CCnvMainForm : public CAknForm , public MEikEdwinObserver
+	{
+
+	public: // constructors and destructor
+
+		/**
+		* Default constructor.
+		*/
+		CCnvMainForm( TBool &aAlreadyDead );
+
+		/**
+		* Destructor.
+		*/
+		~CCnvMainForm();
+
+		/**
+		* 2nd phase constructor.
+		*/
+		void ConstructL();
+
+	private: // constructors
+
+		/**
+		* Default constructor. Not implemented.
+		*/
+		CCnvMainForm();
+
+	public: // from CCoeControl
+
+		/**
+		* Specifies the help context for this form.
+		* @param aContext the context IDs are placed here
+		*/
+		void GetHelpContext( TCoeHelpContext& aContext ) const;
+
+	public: // from MEikCommandObserver
+
+		/**
+		* Handles menu commands.
+		* @param aCommandId Command identifier.
+		*/
+		void ProcessCommandL( TInt aCommandId );
+
+	public:	// from MEikDialogPageObserver
+
+		/**
+		* Takes any action required when the current line is
+		* changed to aControlId.
+		* @param aControlId Control identifier.
+		*/
+		void LineChangedL( TInt aControlId );
+
+	public:	// from MEikMenuObserver
+
+		/**
+		* Dynamically initialises a menu pane. The Uikon framework calls this
+		* function, immediately before the menu pane is activated.
+		* @param aResourceId Resource ID identifying a menu pane to initialise
+		* @param aMenuPane The in-memory representation of the menu pane.
+		*/
+		void DynInitMenuPaneL( TInt aResourceId, CEikMenuPane* aMenuPane );
+
+	protected: // from MCoeControlObserver
+
+		/**
+		* Handles an event originating from one of the form's controls.
+		* @param aControl The control that reported the event.
+		* @param aEventType The type of the reported event.
+		*/
+		void HandleControlEventL( CCoeControl* aControl,
+			TCoeEvent aEventType );
+
+	protected: // from CAknForm
+
+		/**
+		* Saves form popup field states to a file (not implemented, yet).
+		* @return ETrue if the editable state can be left
+		*         (always in this case).
+		*/
+		TBool SaveFormData();
+
+        /**
+        * Deal with that the field is empty,when move focus to other field.
+        * The Uikon framework calls this function,immediately before focus move. 
+        */
+        void PrepareForFocusTransitionL();
+	protected: // from CEikDialog
+
+		/**
+		* Tests if it is OK to exit the dialog.
+		* @param aButtonId The ID of the button that was activated.
+		* @return ETrue to validate and exit the dialog,
+		*         EFalse to keep the dialog active.
+		*/
+		TBool OkToExitL( TInt aButtonId );
+
+		/**
+		* Pre-layout dialog initialisation.
+		*/
+		void PreLayoutDynInitL();
+
+	private: // new methods
+		/**
+		* returns ETrue if the the character is an integer
+		*/
+		TBool IsDigit(TUint aChar);
+
+		/**
+		* Checks if a form control has REALLY changed (uses history knowledge)
+		* Form controls report bogus state changed events, this is used to
+		* filter them out.
+		* @param controlId Form ID of the control to be checked
+		* @return ETrue if the specified control's state has changed
+		*/
+		TBool HasReallyChanged( TInt controlId );
+
+		/**
+		* Initialised change history (for HasReallyChanged)
+		*/
+		void InitialiseChangeHistory();
+
+		/**
+		* Called when the user has changed
+		* the unit type popup field selection.
+		*/
+		void HandleCategoryChangedL();
+
+		/**
+		* Called when the user has changed
+		* either of the unit popup field selections.
+		*/
+		void HandleUnitChangedL();
+
+		/**
+		* Checks if the unit rates (factors) are defined in the model
+		* for the currently selected unit type.
+		* @param aShowNote If ETrue "rates missing note" is shown, if
+		*                  rates are not valid.
+		* @return ETrue if rates are valid, EFalse otherwise.
+		*/
+		TBool AreRatesValidL(TBool aShowNote);
+
+		/**
+		* Checks if a floating point editor's value is within allowable range.
+		* @param aEditorId Resource ID of the editor control to be checked.
+		* @return ETrue If value is in range, EFalse otherwise.
+		*/
+		TBool IsEditorValueValidL( TUint aEditorId );
+
+		/**
+		* Checks if a floating point editor's value is such that no conversion
+		* should be made and no "invalid value" error should be reported.
+		* @param aEditorId Resource ID of the editor control to be checked.
+		* @return ETrue Indicates that conversion should not proceed.
+		*/
+		TBool EditorValueCausesHold( TUint aEditorId );
+
+		/**
+		* Handles the ECmdRates command. Launches the Rates Form.
+		*/
+		void CmdRatesL();
+
+		/**
+		* Handles the ECmdSetType command.
+		*/
+		void CmdSetTypeL();
+
+		/**
+		* Handles the ECmdSetUnit command.
+		*/
+		void CmdSetUnitL();
+
+		/**
+		* Tells the model to load its state from a file.
+		*/
+		void LoadStateL();
+
+		/**
+		* Tells the model to save its state to a file.
+		* Displays an error note if there is not enough space in permanent
+		* storage.
+		*/
+		void SaveState();
+
+		/**
+		* Calculates and displays the unit conversion immediately.
+		*/
+		void SynchronousConversionL( TBool aShowRateInvalidNote = ETrue );
+
+		/**
+		* Calculates and displays the unit conversion after 0.75 seconds.
+		*/
+		void AsynchronousConversion();
+
+		/**
+		* Cancels a queued asynchronous conversion request, if any.
+		*/
+		void CancelConversion();
+
+		/**
+		* Called by the conversion timer after the 0.75 second timeout
+		* has exipred. Calls SynchronousConversion() to do
+		* the actual conversion.
+		* @param aMainForm Pointer to the CCnvMainForm instance.
+		*/
+		static TInt TimerCallback( TAny* aMainForm );
+
+		/**
+		* Shows an error note for invalid value situation
+		* @param aEditorId Id of the editor that holds the invalid value
+		*/
+		void ShowInvalidValueNoteL(TInt aEditorId);
+
+		/**
+		* From CCoeControl processing of a key event
+		* @param aKeyEvent : Key event information
+		*        aType : EEventKeyDown | EEventKey | EEventKeyUp
+		* @return : EKeyWasConsumed if keyevent is consumed.   
+		*           EKeyWasNotConsumed if keyevent is not consumed.
+		* Handling of the keys is taken care for the editor fields
+		*/
+		TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,
+			TEventCode aType);
+
+		/**
+		*Checks if the number entered in the editor field is a valid number
+		*@param aEditroId : Id of the editor that needs to be evaluated
+		*@return : EFalse if the editor value is not a vaild number	
+		*		 : ETrue if the number is a valid number
+		*/
+		TBool IsVaildNumberEntered(TInt aEditorId);
+
+		/**
+		*From MEikEdwinObserver. handles the Navigation on the editor control. 
+		*/
+		void HandleEdwinEventL(CEikEdwin* aEdwin,TEdwinEvent aEventType);
+		
+		/**
+		*Do the calculation and change the value for the related edit field
+		*/
+		void ValueCalculationL( TUint aUnit1Popup, TUint aUnit2Popup, TReal aMount );
+
+	private: // data
+
+		/**
+		* Pointer to our model. Owned.
+		*/
+		CCnvConverter* iModel;
+
+		/**
+		* Model accessor for unit types.
+		*/
+		TCnvCategory iTypeCategory;
+
+		/**
+		* Model accessor for source units.
+		*/
+		TCnvCategory iUnit1Category;
+
+		/**
+		* Model accessor for destination units.
+		*/
+		TCnvCategory iUnit2Category;
+
+		/**
+		* Pointer to the Unit Type popup field. Not owned.
+		*/
+		CAknPopupField* iTypePopupCtrl;
+
+		/**
+		* Pointer to the source Unit popup field. Not owned.
+		*/
+		CAknPopupField* iUnit1PopupCtrl;
+
+		/**
+		* Pointer to the destination Unit popup field. Not owned.
+		*/
+		CAknPopupField* iUnit2PopupCtrl;
+
+		/**
+		* Id of the currency category in the model.
+		*/
+		TUint iCurrencyCategoryId;
+
+		/**
+		* ETrue if this instance is fully constructed, EFalse otherwise.
+		*/
+		TBool iIsFullyConstructed;
+
+		/**
+		* ETrue if the user has already been notified that the disk is full.
+		*/
+		TBool iHasNotifiedDiscFull;
+
+		/**
+		* ETrue if the iLastUsedEditorId has changed after the focus
+		* has entered the editor.
+		*/
+		TBool iActiveEditorChanged;
+
+		/**
+		* Pointer to the timer used for asynchronous conversions
+		* (which need a0.75 second delay..)
+		*/
+		CPeriodic* iConversionTimer;
+
+		/**
+		* The id of the unit amount field that the user has modified last.
+		*/
+		TInt iLastUsedEditorId;
+
+		/**
+		* The id of the line that was last active in the form.
+		*/
+		TInt iLastActiveEditorLine;
+
+		/**
+		* The previous type selection.
+		*/
+		TInt iHistoryTypeCategory;
+
+		/**
+		* The previous source unit selection.
+		*/
+		TInt iHistoryUnit1Category;
+
+		/**
+		* The previous destination unit selection.
+		*/
+		TInt iHistoryUnit2Category;
+
+		/**
+		* Pointer to the Error UI object. Owned
+		* Used for displaying the Disk Full error message.
+		*/
+		CErrorUI* iErrorUI;
+
+		/**
+		* Reference to a flag in this form's owner.
+		* Used to indicate that we have been deleted by someone
+		* (could be the app framework.. <sigh>)
+		*/
+		TBool& iAlreadyDead;	
+
+		TKeyEvent iKeyEvent;
+
+		TBool isEdwinNavigated;
+		TBool isEdwinUpdateText;
+
+	};
+
+#endif // __CCNVMAINFORM_H__
+