author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 13 Oct 2010 15:34:15 +0300 | |
branch | RCL_3 |
changeset 63 | e1987ab3768a |
parent 0 | 15bf7259bb7c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Concrete editor control for plain (descriptor content) text |
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* |
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*/ |
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#ifndef C_ALFPLAINTEXTEDITORCONTROL_H |
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#define C_ALFPLAINTEXTEDITORCONTROL_H |
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#include <e32base.h> |
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#include <alf/alfcontrol.h> |
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#include <alf/alfeditorcontrol.h> |
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#include <eikon.hrh> // For Avkon key mappings |
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|
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/* Forward declarations. */ |
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class CAlfTextEditorVisualization; |
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class CAlfTextSource; |
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class CAlfEditorPlainTextModifier; |
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class CRichText; |
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class CAlfTextEditorFunctionalState; |
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|
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/** |
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* CAlfPlainTextEditorControl provides un-marked up text editing |
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* |
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* Usage: |
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* @code |
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* //Create editor control |
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* CAlfPlainTextEditorControl* control = new (ELeave) CAlfPlainTextEditorControl; |
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* control->ConstructL( *iEnv ); |
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* control->SetMaximumTextLength( KTestMaximumTextLength ); |
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* |
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* //Read entered text |
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* HBufC* readText = control->GetTextInHBufL(); |
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* |
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* //Access plain text buffer |
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* CPlainText& text = control->Text(); |
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* TPtrC readText = text.Read(control->TextLength()); |
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* |
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* @endcode |
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* @lib alfclient.lib |
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* @since S60 3.2 |
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*/ |
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NONSHARABLE_CLASS(CAlfPlainTextEditorControl) : public CAlfEditorControl |
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{ |
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public: |
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/** @beginAPI */ |
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/** |
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* Statically creates in instance of this class |
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* |
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* @param aEnv Alfred environment object |
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* @return a fully-constructed instance |
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*/ |
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IMPORT_C static CAlfPlainTextEditorControl* NewL(CAlfEnv& aEnv); |
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/** |
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* Constructor. |
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* |
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*/ |
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CAlfPlainTextEditorControl(); |
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/** |
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* 2nd stage constructor |
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* |
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* @param aEnv The Alf Environment |
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*/ |
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void ConstructL(CAlfEnv& aEnv); |
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/** |
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* Destructor. |
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*/ |
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virtual ~CAlfPlainTextEditorControl(); |
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public: // From CAlfControl |
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/** |
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* Called when the control's focus state changes. |
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* |
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* @param aDisplay The display where this control is changing focus |
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* @param aFocused EFalse iff losing focus. |
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*/ |
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void FocusChanged( CAlfDisplay& aDisplay, TBool aFocused ); |
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/** |
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* Called when an input event is being offered to the control. |
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* |
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* @param aEvent Event to be handled. |
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* |
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* @return <code>ETrue</code>, if the event was handled. |
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* Otherwise <code>EFalse</code>. |
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*/ |
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virtual TBool OfferEventL( const TAlfEvent& aEvent ); |
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|
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/** |
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* Notifies the control that its visible has been changed on a display. |
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* This is the earliest time when the control knows the dimensions of |
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* the display it is being shown on. |
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* |
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* @param aIsVisible ETrue, if the control is now visible on the display. |
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* EFalse, if the control is about to the hidden on the display. |
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* @param aDisplay The display on which the control's visibility is changing. |
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*/ |
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virtual void NotifyControlVisibility( |
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TBool aIsVisible, |
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CAlfDisplay& aDisplay ); |
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|
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public: // From MVisualOwner: |
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|
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virtual void VisualLayoutUpdated(CAlfVisual& aVisual); |
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public: // From CAlfEditorControl |
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|
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virtual void VisualizeL( CAlfLayout* aParentLayout ); |
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|
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public: // New Methods |
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|
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/** |
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* Copy a descriptor into the editor as the current text. |
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* Note this method is not suitable for long texts since a copy of the text is made. |
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* |
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* @param aText Text descriptor to be copied in |
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*/ |
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IMPORT_C void SetTextL( const TDesC& aText ); |
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|
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/** |
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* Transfer to the caller ownership of newly constructed copy of the text. |
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* Note that this method is not recommended for long texts. |
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* |
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* The returned buffer will have have length TextLength() and will not have an appended paragraph marker. |
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* |
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* @return A newly instantiated copy of the text in the editor. Owned by the caller. |
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*/ |
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IMPORT_C HBufC* GetTextInHBufL() const; |
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|
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/** |
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* Access the plain text buffer |
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* |
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* The CPlainText object will always have an end of paragraph mark (0x2029) appended. This will be at character index |
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* TextLength(). |
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* @see TextLength() |
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* |
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* @return a reference to a CPlainText object containing the document.. No ownership is transferred. |
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*/ |
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IMPORT_C CPlainText& Text() const; |
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|
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/** |
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* Access the current text length. |
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* |
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* The returned value does not count the end of paragraph mark ( 0x2029 ) which is found ad the end of the CPlainText object. |
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* |
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* @return The length of the text |
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*/ |
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IMPORT_C TInt TextLength() const; |
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|
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/** |
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* Sets the maximum text length. |
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* |
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* This method will panic if the passed-in value is greater than the current TextLength() |
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* |
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* @param maximum allowed length of text |
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*/ |
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IMPORT_C void SetMaximumTextLength( TInt aMaxTextLength ); |
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|
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/** |
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* Access the maximum text length |
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* |
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* @return maximum allowed length of text |
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*/ |
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IMPORT_C TInt MaximumTextLength() const; |
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|
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/** |
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* Set the current input position within the document. It is possible to set both the pending input position (cursor position) |
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* in logical order, and to set to which run of text that cursor should be associated with. |
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* |
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* In the following, the terms "next", "previous", "after" and "before" all refer to the logical ordering of characters in the text |
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* buffer. The terms "left" and "right" refer to visual positioning. |
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* |
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* The valid range for the position is 0 to TextLength(), inclusive. A value of TextLength() indicates the cursor is positioned after |
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* the last character. The value of the cursor position can be though of as a "gap number", where the first gap is that before |
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* character 0, and the last gap is that after TextLength(). Another way of thinking of this is the cursor position represents |
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* the 0-based index of a character that would be input at that point. More simply, it can be thought of as sharing an |
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* index value with the next character in the buffer. |
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* |
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* The leading flag can be used to associate the cursor visually with the next character in logical order (aLeading = ETrue) |
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* or with the previous character in logical order. This has an effect visually, if the previous and next characters are in runs of |
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* text with different directionality. If a cursor is at ( N, Trailing ), and character at index N-1 is in a left-to-right (L-R) run of text, |
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* then the cursor will be displayed to the right of character N-1. This would be the default for a cursor at the end of a run of |
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* L-R text. However, if the cursor is set to ( N, Leading ) and the character at index N is in a right-to-left (R-L) text run, then |
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* the cursor will adhere to that block and be positioned to the right side of character N. Note that this cursor position could |
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* potentially be at some distance to the right from the (N, Trailing) visual position. |
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* |
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* Conversely if there is a run of R-L text followed (logically) by L-R text, and the curosr is positioned at N. (i.e. N is in the |
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* L-R text and N-1 is in the R-L). In this case, if the cursor is trailing, it trails character N-1, and therefore is |
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* positioned at the end (left side) of the R-L text - which is positioned visually between the runs of text. If the cursor is |
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* set to leading, then it leads character N, and is therefore at the left end of the L-R text, probably at the left end of the whole text. |
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* |
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* Note that the values of ( 0, Trailing ), and ( TextLength(), Leading ) are both legal, and behave as they are specified. |
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* SetCursorPos(0) is generally what one wants. It will cause the cursor to adhere to the end of text that is entered/pasted. |
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* SetCursorPos( MaxLength(), ETrue ) will generally behave the same as SetCursorPos( MaxLength(), EFalse) since there |
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* will still be no "next run" of text after input. |
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* |
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* @param a "gap number" in the document. |
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* @param aLeading = EFalse iff the cursor is to be associated visually to the previous character's run of text. |
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*/ |
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IMPORT_C void SetCursorPos( TInt aNewPosition, TBool aLeading = EFalse ); |
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|
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/** |
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* Gets the current input position within the document. |
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* @see SetCursorPos( TInt, TBool ); |
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* |
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* @param returns the logical position of the cursor |
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* @param returns the leading/trailing flag |
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*/ |
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IMPORT_C void GetCursorPos( TInt& aPosition, TBool& aLeading ); |
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|
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/** |
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* Obtain the simple cursor position without leading/trailing information. |
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* This API is appropriate in many cases that the visual positioning of the cursor is not a concern. |
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* @see SetCursorPos( TInt, TBool ); |
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* |
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* @return the gap number that the cursor is presently located in |
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*/ |
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IMPORT_C TInt CursorPos() const; |
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|
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/** |
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* Set a selection on the editor contents. The selection is single contiguous range of indices with a |
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* starting cursor position (the "Anchor") and an end position (the "Cursor"). It thus has a directionality. |
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* The semantics of the selection is that it indicates what set of characters the next user input is going |
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* to affect. It is usually indicated to the user with a selection highlight. The ends of the selection may or |
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* may not be differentiated visually to the user. |
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* |
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* Both anchor and cursor follow the conventions of the the cursor in SetCursorPos. |
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* @see SetCursorPos( TInt, TBool ) |
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* Note however, that the selected set of characters comprises those characters between the anchor and cursor. |
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* So if a selection is set at (M,N), and then the selection is deleted, the characters at indices M, M+1...N-1 will be deleted. |
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* |
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* The Set/GetCursorPos APIs interoperate with the selection-oriented APIs. The cursor position is merely the |
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* end point of the selection. |
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* |
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* Setting a zero length selection is the same as setting a (non-selection) cursor position. This action leaves the |
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* leading/trailing flag state of the cursor unchanged. If the editor client needs to zero the selection and also change the |
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* leading/trailing flag, he must first call SetSelection with zero length, and then call SetCursorPos, explicitly setting the |
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* leading/trailing flag. |
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* |
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* Setting a non-zero length selection does affect the leading trailing flag, according to the following rules: |
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* If aCursorPosition > aAnchorPosition, then the flag is set to Trailing. |
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* If aCursorPosition < aAnchorPosition, then the flag is set to Leading. |
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* |
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* Deletion or replacing the selection (by user activity or via the Text() interface leaves the leading trailing state |
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* unchanged |
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* |
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* @param aAnchorPosition Starting gap position of the selection |
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* @param aCursorPosition End gap position of the selection |
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*/ |
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IMPORT_C void SetSelection( TInt aAnchorPosition, TInt aCursorPosition ); |
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|
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/** |
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* Moves only the cursor position of the selection. The anchor position remains unchanged. |
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* |
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* @param the cursor position to move the end of the selection to. |
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*/ |
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IMPORT_C void ExtendSelection( TInt aNewCursorPosition ); |
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|
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/** |
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* Obtain the current selection. |
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* @see SetSelection( TInt, TInt ); |
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* |
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* @param aAnchorPosition Returns the anchor gap number |
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* @param aCursorPosition Returns the cursor gap number |
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*/ |
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IMPORT_C void GetSelection( TInt& aAnchorPosition, TInt& aCursorPosition )const; |
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|
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/** |
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* Sets permitted cases for the editor. |
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* Possible flags from @c uikon.hrh are @c EAknEditorAllCaseModes, |
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* @c EAknEditorUpperCase, @c EAknEditorLowerCase and |
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* @c EAknEditorTextCase. |
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* @c EAknEditorAllCaseModes is default. |
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* |
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* @param aPermittedCaseModes Case modes that are available in the editor. |
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*/ |
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IMPORT_C void SetPermittedCaseModes(TInt aPermittedCaseModes); |
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|
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/** |
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* Sets default case for the editor. The case is used when the editor |
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* is focused first time. Available case flags from @c uikon.hrh |
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* are @c EAknEditorUpperCase, @c EAknEditorLowerCase and |
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* @c EAknEditorTextCase. @c EAknEditorTextCase is used if the initial |
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* case by default. |
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* |
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* @param aCase Initial case to be used in the editor. |
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*/ |
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IMPORT_C void SetDefaultCase(TInt aDefaultCase); |
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309 |
|
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/** |
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311 |
* Updates editor case. FEP is automatically notified of the |
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* case change in editor state and FEP takes new case to use immediately. |
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313 |
* Available case flags from @c uikon.hrh are @c EAknEditorUpperCase, |
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* @c EAknEditorLowerCase and @c EAknEditorTextCase. |
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|
315 |
* This method should not be used to set initial case for the editor. |
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|
316 |
* Use @c SetAknEditorCase() method instead for setting initial case. |
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|
317 |
* |
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* @param aCase New case for the editor. |
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319 |
*/ |
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IMPORT_C void SetCurrentCase(TInt aCase); |
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|
321 |
|
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322 |
/** |
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|
323 |
* Sets default input mode for the editor. The input mode is used when |
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* the editor is focused first time. |
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* @c EAknEditorTextInputMode is used if the initial input mode by default. |
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326 |
* |
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* @param aInputMode Initial input mode to be used in the editor. |
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328 |
*/ |
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IMPORT_C void SetDefaultInputMode( TInt aInputMode ); |
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330 |
|
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331 |
/** |
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|
332 |
* Updates editor input mode. FEP is automatically notified of the |
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|
333 |
* new input mode in editor state and FEP takes new input mode to use |
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334 |
* immediatelly. Current inline editing is reset. |
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|
335 |
* This method should not be used for setting initial input mode for the |
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|
336 |
* editor. Use @c SetAknEditorInputMode() method instead for setting |
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337 |
* initial input mode. |
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338 |
* |
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* @param aInputMode New input mode for the editor. |
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*/ |
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341 |
IMPORT_C void SetCurrentInputMode( TInt aInputMode ); |
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342 |
|
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343 |
/** |
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344 |
* Sets allowed input modes for the editor. |
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|
345 |
* All input modes are allowed (@c EAknEditorAllInputModes) if the value |
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346 |
* is not set from EDWIN resource @c allowed_input_modes or with this API. |
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347 |
* |
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348 |
* @param aInputModes Input modes that are allowed in the editor. |
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349 |
*/ |
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IMPORT_C void SetPermittedInputModes( TInt aInputModes ); |
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|
351 |
|
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352 |
/** |
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|
353 |
* Sets number mode key mapping for '*' and '#' keys. The key mapping is |
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|
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* used in editors when numeric input mode is used. Key mapping characters |
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|
355 |
* for '*' key are shown on special character table if also text input |
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|
356 |
* modes are allowed in the editor but the current input mode is numeric |
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|
357 |
* mode. @c EAknEditorStandardNumberModeKeymap is used in editors that |
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|
358 |
* allow only numeric input if the mapping is not set from EDWIN resource |
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|
359 |
* @c numeric_keymap or with this API. |
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|
360 |
* @c EAknEditorAlphanumericNumberModeKeymap is used as default if the |
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|
361 |
* editor allows also text input mode. |
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362 |
* |
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|
363 |
* @param aNumericKeymap Key mapping used in an editor with number input |
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* mode. |
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365 |
*/ |
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366 |
IMPORT_C void SetNumericKeymap( |
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TAknEditorNumericKeymap aNumericKeymap); |
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|
368 |
|
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369 |
/** |
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370 |
* Sets the @c EOnlyASCIIChars flag. |
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371 |
* |
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|
372 |
* @param aASCIIOnly If @c ETrue the EOnlyASCIIChars flag will be set. If |
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|
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* @c EFalse the EOnlyASCIIChars flag will be removed. |
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374 |
*/ |
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|
375 |
IMPORT_C void SetOnlyASCIIChars( TBool aASCIIOnly ); |
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376 |
|
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377 |
/** |
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|
378 |
* Autoselection of text. When set, this initially sets the editor to have the cursor position |
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|
379 |
* at the end of the document with the selection's anchor at the beginning. |
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|
380 |
* That is, the whole text is selected. |
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381 |
* |
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|
382 |
* If cursor positioning at the end is desired, but with no auto-selection, then the flag |
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|
383 |
* EAutoCursorAtEndIndex should be used. But if selection is desired, then this flag only |
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|
384 |
* is needed. |
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385 |
* |
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|
386 |
* This setting is looked at whenever SetTextL is called and not just at initial display of the editor. |
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387 |
* |
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|
388 |
* @param aAutoSelection iff not EFalse, will cause autoselection |
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389 |
*/ |
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390 |
IMPORT_C void SetAutoSelection( TBool aAutoSelection ); |
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|
391 |
|
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392 |
/** |
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393 |
* Automatic setting of the cursor at the end of the document. |
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|
394 |
* If set, this initially sets the editor to have the cursor position at the end of the document, |
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|
395 |
* but with no selection. |
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|
396 |
* |
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|
397 |
* This setting is looked at whenever SetTextL is called and not just at initial display of the editor. |
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|
398 |
* |
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|
399 |
* @param aCursorAtEnd iff not EFalse, will cause auto-positioning of the cursor at the end of the document |
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400 |
*/ |
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|
401 |
IMPORT_C void SetInitialCursorAtEnd( TBool aCursorAtEnd ); |
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|
402 |
|
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|
403 |
/** |
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Revision: 201003
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|
404 |
* Access method for visualizations to get at the non editor content state |
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405 |
* @return A pointer to a CAknEditorState object |
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406 |
*/ |
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|
407 |
CAlfTextEditorFunctionalState& State() const; |
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|
408 |
|
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|
409 |
/** |
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Revision: 201003
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|
410 |
* Set the text style for the text. The Id passed in is either a pre-allocated |
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* Alf text style ID or a derived ID using the TextStyleManager. |
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* |
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* @param aTextStyleId Alf platform-specifc text id |
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*/ |
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IMPORT_C void SetTextStyleId( TInt aTextStyleId ); |
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protected: |
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private: |
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/** |
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* Create visuals for this editor in the given parent |
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*/ |
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void CreateVisualizationL( CAlfLayout* aParentLayout ); |
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void SetSingleAknEditorFlagAndReportIfChanged( TInt aSingleFlag, TBool aNewValue ); |
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|
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private: |
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// @todo Not properly BC-proofed |
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CAlfTextSource* iTextSource; // Owned |
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CAlfEditorPlainTextModifier* iTextModifier; // Owned |
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TInt iMaximumTextLength; |
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CAlfTextEditorVisualization* iTextVisualization; // Not Owned |
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|
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// Functional flags: |
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CAlfTextEditorFunctionalState* iState; |
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// textStyleId to be passed to the visualization |
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TInt iTextStyleId; |
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|
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TInt iSpare; |
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}; |
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|
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#endif // C_ALFPLAINTEXTEDITORCONTROL_H |