// 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:

//

#ifndef __COECNTRL_H__

#define __COECNTRL_H__

#include <e32std.h>

#include <e32base.h>

#include <w32std.h>

#include <gulalign.h>

#include <coedef.h>

#include <coecobs.h>

#include <coehelp.h>

#include <coeinput.h>

#include <coemop.h>

#include <coemain.h>

#include <coefont.h>

#include <coetextdrawer.h>

#include <coecontrolarray.h>

#include <coecoloruse.h>	// class TCoeColorUse

class TResourceReader;

class CCoeEnv;

class MCoeControlContext;

class CCoeControlStorage;

class MCoeLayoutManager;

class TCoeZoomWithType; 

class CCoeFontProvider;

// forward declarations.	

class CCoeControl;

class CCoeTextDrawerBase;

/** Interface to be used if a control elects to be a background drawer.

Parent controls can elect to take responsibility for drawing the background for their child

controls. To achieve this, they should aggregate an object that implements this interface.

CCoeControl::SetBackground() accepts the object and sets it as the background drawer

@see CCoeControl::EnableWindowTransparency()

@publishedAll

@released

*/

class MCoeControlBackground

	{

public:

	/** Draw the background for a given control.

	The text drawer that shall be used to draw text on the specific background can be 

	fetched through the GetTextDrawer() method. 

	@param aGc Graphics context used for drawing

	@param aControl The control being drawn (may be a child of the drawer)

	@param aRect The area to be redrawn

	@publishedAll

	@released

	*/

	virtual void Draw(CWindowGc& aGc, const CCoeControl& aControl, const TRect& aRect) const = 0;

	/**

	This function retrieves the text drawer associated with the background.

	@param aTextDrawer The text drawer associated with the background. This may be null. The default implementation

	always sets this to 0.

	@param aDrawingControl The control that is requesting the text drawer.

	*/

	IMPORT_C virtual void GetTextDrawer(CCoeTextDrawerBase*& aTextDrawer, const CCoeControl* aDrawingControl) const;

protected:

	IMPORT_C MCoeControlBackground();

private:  

  	IMPORT_C virtual void MCoeControlBackground_Reserved1();

  	IMPORT_C virtual void MCoeControlBackground_Reserved2();

  	IMPORT_C virtual void MCoeControlBackground_Reserved3();

  	IMPORT_C virtual void MCoeControlBackground_Reserved4();

  	IMPORT_C virtual void MCoeControlBackground_Reserved5();

private:

	TInt iMCoeControlBackground_Reserved1();

	};

/** Abstract interface for defining a control's hit region.

This could be implemented by a CCoeControl-derived class to 

define hit region checking. The object is installed by calling CCoeControl::SetHitTest().

The hit region is the area inside the control's rectangle in which pointer events are handled.

It can be any shape, not necessarily rectangular.

@publishedAll

@released

*/

class MCoeControlHitTest

	{

public:	

	/** Tests whether a pointer event occurred inside the control's hit region.

	This function is called by CCoeControl::HandlePointerEventL().

	@param aPoint The position of the pointer event.

	@return ETrue if the specified point lies inside the hit region, EFalse if not.

	@publishedAll

	@released

	*/

	virtual TBool HitRegionContains(const TPoint& aPoint, const CCoeControl& aControl) const = 0;

protected:

	IMPORT_C MCoeControlHitTest();

private:

	IMPORT_C virtual void MCoeControlHitTest_Reserved1();

	IMPORT_C virtual void MCoeControlHitTest_Reserved2();

private: 

    TInt iMCoeControlHitTest_Reserved1;

	};

/** 

Control base class from which all other controls are derived. 

@publishedAll

@released 

*/

class CCoeControl : public CBase, public MObjectProvider

	{

public:

    enum TZoomType 

        { 

        EAbsoluteZoom,        // absolute 

        ERelativeZoom         // relative to parent's zoom 

        }; 

public:    

    // Construction and destruction    

	IMPORT_C CCoeControl();

	IMPORT_C CCoeControl(CCoeEnv* aCoeEnv);

	IMPORT_C ~CCoeControl();

	IMPORT_C TBool ComponentArrayExists() const;

public: // Virtuals (see more related non-virtuals further down)

	// Key input

	IMPORT_C virtual TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType);

	// Visual state

	IMPORT_C virtual void MakeVisible(TBool aVisible);

	IMPORT_C virtual void SetDimmed(TBool aDimmed);

	// Construction

	IMPORT_C virtual void SetContainerWindowL(const CCoeControl& aContainer);

	IMPORT_C virtual void ConstructFromResourceL(TResourceReader& aReader);

	IMPORT_C virtual void ActivateL();

	// Focus

	IMPORT_C virtual void PrepareForFocusLossL();

	IMPORT_C virtual void PrepareForFocusGainL();

	// Control proximity

	IMPORT_C virtual void SetAdjacent(TInt aAdjacent);

	IMPORT_C virtual void SetNeighbor(CCoeControl* aNeighbor);

	IMPORT_C virtual TBool HasBorder() const;	// deprecated from 9.2

	// Control size

	IMPORT_C virtual TSize MinimumSize();

	// Resource change handling

	IMPORT_C virtual void HandleResourceChange(TInt aType);

	// Logical color use (for Java)

	IMPORT_C virtual void GetColorUseListL(CArrayFix<TCoeColorUse>& aColorUseList) const;

	// User help

	IMPORT_C virtual void GetHelpContext(TCoeHelpContext& aContext) const;

	// Text input

	IMPORT_C virtual TCoeInputCapabilities InputCapabilities() const;

public:	

	// Environment

	inline CCoeEnv* ControlEnv() const;

	// Container window

	IMPORT_C RDrawableWindow* DrawableWindow() const;

	IMPORT_C TBool OwnsWindow() const;

	IMPORT_C TBool IsBackedUp() const;

	IMPORT_C void SetContainerWindowL(RWindow& aWindow); 			// deprecated from 9.2

	IMPORT_C void SetContainerWindowL(RBackedUpWindow& aWindow);	// deprecated from 9.2

	// Control parent

	IMPORT_C CCoeControl* Parent();

	IMPORT_C const CCoeControl* Parent() const;

	IMPORT_C virtual TInt SetParent(CCoeControl* aParent);

	// Size and position

	IMPORT_C TRect Rect() const;

	IMPORT_C void SetRect(const TRect& aRect);

	IMPORT_C void SetExtent(const TPoint& aPosition,const TSize& aSize);

	IMPORT_C void SetExtentToWholeScreen();

	IMPORT_C TSize Size() const;

	IMPORT_C void SetSize(const TSize& aSize);

	IMPORT_C TPoint Position() const;

	IMPORT_C TPoint PositionRelativeToScreen() const;

	IMPORT_C void SetPosition(const TPoint& aPosition);

	IMPORT_C TInt MaximumWidth() const;

	IMPORT_C TInt SetMaximumWidth(TInt aMaxWidth);

	// Layout	

	IMPORT_C MCoeLayoutManager* LayoutManager() const;

	IMPORT_C virtual void SetLayoutManagerL(MCoeLayoutManager* aLayout);

	IMPORT_C virtual TBool RequestRelayout(const CCoeControl* aChildControl);

	// Visibility

	IMPORT_C TBool IsVisible() const;

	IMPORT_C void SetComponentsToInheritVisibility(TBool aInherit=ETrue);

	// Dimmed

	IMPORT_C TBool IsDimmed() const;

	// State observer

	IMPORT_C void SetObserver(MCoeControlObserver* aObserver);

	IMPORT_C MCoeControlObserver* Observer() const;

	// Focus

	IMPORT_C TBool IsFocused() const;

	IMPORT_C void SetFocus(TBool aFocus,TDrawNow aDrawNow=ENoDrawNow);

	IMPORT_C void SetNonFocusing();

	IMPORT_C void SetFocusing(TBool aFocusing);

	IMPORT_C TBool IsNonFocusing() const;

	// Drawing (see also Draw() below)

	IMPORT_C void DrawNow() const;

	IMPORT_C void DrawNow(const TRect &aRect) const;

	IMPORT_C void DrawDeferred() const;

	IMPORT_C CWindowGc& SystemGc() const;

	IMPORT_C TInt SetCustomGc(CWindowGc* aGraphicsContext);

	IMPORT_C CWindowGc* CustomGc() const;	

	// Control context (background color etc). Deprecated (use MCoeControlBackground)

	IMPORT_C void SetControlContext(MCoeControlContext* aContext);		// deprecated from 9.2

	IMPORT_C void CopyControlContextFrom(const CCoeControl* aControl);	// deprecated from 9.2

	IMPORT_C MCoeControlContext* ControlContext() const;				// deprecated from 9.2

	// Pointer events

	IMPORT_C void SetPointerCapture(TBool aCapture=ETrue);

	IMPORT_C void ClaimPointerGrab(TBool aSendUpEvent=ETrue);

	IMPORT_C TInt ClaimPointerGrab(TInt aPointerNumber, TBool aSendUpEvent);

	IMPORT_C void IgnoreEventsUntilNextPointerUp();

	IMPORT_C void SetGloballyCapturing(TBool aGlobal);

	// Pointer hit test

	IMPORT_C TInt SetHitTest(const MCoeControlHitTest* aHitTestControl);

	IMPORT_C const MCoeControlHitTest* HitTest() const;

	// Logical colors

	IMPORT_C void OverrideColorL(TInt aLogicalColor,TRgb aColor);

	IMPORT_C TBool GetColor(TInt aLogicalColor,TRgb& aColor) const;

	// Control background

	IMPORT_C void DrawBackground(const TRect& aRect) const;

	IMPORT_C void DrawForeground(const TRect& aRect) const;

	IMPORT_C const MCoeControlBackground* Background() const;

	IMPORT_C const MCoeControlBackground* FindBackground() const;

	IMPORT_C void SetBackground(const MCoeControlBackground* aBackground);

	// Zooming

	IMPORT_C void SetZoomFactorL(TInt aZoomFactor, TZoomType aZoomType = ERelativeZoom);

   	IMPORT_C TZoomFactor AccumulatedZoom() const;

   	IMPORT_C const TCoeZoomWithType* ZoomWithType() const;

  	// Font provider (see ScreenFont() below)

    IMPORT_C const CCoeFontProvider& FindFontProvider() const;

	IMPORT_C void SetFontProviderL(const CCoeFontProvider& aFontProvider);

	// Text baseline (virtuals)

	IMPORT_C virtual TInt TextBaselineOffset(const TSize& aSize) const;

	IMPORT_C virtual void SetTextBaselineSpacing(TInt aSpacing);

	// Input capabilities

	IMPORT_C TCoeInputCapabilities RecursivelyMergedInputCapabilities() const;

	// Interface access

	IMPORT_C void SetMopParent(MObjectProvider* aParent);

	// Instance identification

	IMPORT_C TInt UniqueHandle() const;

	IMPORT_C TInt SetUniqueHandle(TInt aUniqueHandle); 

public: // Pointer events (virtuals)

	IMPORT_C virtual void HandlePointerEventL(const TPointerEvent& aPointerEvent);

protected: // Virtuals. Override to handle these events.

	IMPORT_C virtual void HandlePointerBufferReadyL();	// See HandlePointerEventL()

	// Change of focus

	IMPORT_C virtual void FocusChanged(TDrawNow aDrawNow);

	// Change of size and position

	IMPORT_C virtual void SizeChanged();

	IMPORT_C virtual void PositionChanged();

public:

	// Component control access

	IMPORT_C virtual TInt CountComponentControls() const;

	IMPORT_C virtual CCoeControl* ComponentControl(TInt aIndex) const;

	IMPORT_C TInt Index(const CCoeControl* aControl) const;

protected:

	// Control state	

	IMPORT_C TBool IsActivated() const;

	IMPORT_C TBool IsBeingDestroyed() const;

	// Component ownership

	IMPORT_C void InitComponentArrayL();

	IMPORT_C CCoeControlArray& Components();

	IMPORT_C const CCoeControlArray& Components() const;

	// Container window

	IMPORT_C RWindow& Window() const;

	IMPORT_C RBackedUpWindow& BackedUpWindow() const;

	IMPORT_C void CloseWindow();

	IMPORT_C void CreateWindowL();

	IMPORT_C void CreateWindowL(const CCoeControl* aParent);

	IMPORT_C void CreateWindowL(RWindowTreeNode& aParent);

	IMPORT_C void CreateWindowL(RWindowGroup* aParent);

	IMPORT_C void CreateBackedUpWindowL(RWindowTreeNode& aParent);

	IMPORT_C void CreateBackedUpWindowL(RWindowTreeNode& aParent,TDisplayMode aDisplayMode);

	IMPORT_C void EnableWindowTransparency();

	// Size and position

	IMPORT_C void SetCornerAndSize(TGulAlignment aCorner,const TSize& aSize);

	IMPORT_C void SetSizeWithoutNotification(const TSize& aSize);

	// Font access

	IMPORT_C const CFont& ScreenFont(const TCoeFont& aFont) const;

	// Text drawer

	IMPORT_C CCoeTextDrawerBase& TextDrawer(TInt aKey = KErrNotFound) const; 

	// Pointer events

	IMPORT_C void EnableDragEvents();

	IMPORT_C void HandleRedrawEvent(const TRect& aRect) const;

	IMPORT_C void SetAllowStrayPointers();

	IMPORT_C CCoeControl* GrabbingComponent() const;

	IMPORT_C CCoeControl* GrabbingComponent(TInt aPointer) const;

	IMPORT_C TBool CapturesPointer() const;

	// Drawing	

	IMPORT_C TBool IsReadyToDraw() const;

	IMPORT_C TBool IsBlank() const;

	IMPORT_C void SetBlank();

	IMPORT_C void SetCanDrawOutsideRect();

	IMPORT_C void ActivateGc() const;

	IMPORT_C void DeactivateGc() const;

	IMPORT_C void ResetGc() const;

	// State events

	IMPORT_C void ReportEventL(MCoeControlObserver::TCoeEvent aEvent);

	// Resource changes	

	IMPORT_C void HandleComponentControlsResourceChange(TInt aType);

	// Copy Constructor and Assignment Operator

	inline CCoeControl(const CCoeControl& aControl);

	inline CCoeControl& operator=(const CCoeControl& aControl);

protected:	

	friend class CCoeControlArray;   

	IMPORT_C virtual void HandleControlArrayEventL(CCoeControlArray::TEvent aEvent, const CCoeControlArray* aArray, CCoeControl* aControl, TInt aControlId);

private: // reserved

	IMPORT_C virtual void Reserved_CCoeControl_10();

	IMPORT_C virtual void Reserved_CCoeControl_11();

	IMPORT_C virtual void Reserved_CCoeControl_12();

	IMPORT_C virtual void Reserved_CCoeControl_13();

private:

	IMPORT_C virtual void GetTextDrawer(CCoeTextDrawerBase*& aTextDrawer, const CCoeControl* aDrawingControl, TInt aKey) const;

private: // reserved

	IMPORT_C virtual void Reserved_CCoeControl_8();

	IMPORT_C virtual void Reserved_CCoeControl_9();

protected: // from MObjectProvider

	IMPORT_C TTypeUid::Ptr MopSupplyObject(TTypeUid aId);

private: // from MObjectProvider

	IMPORT_C MObjectProvider* MopNext();

private: 

	// Drawing (override this to draw)

	IMPORT_C virtual void Draw(const TRect& aRect) const;

protected: 

	// Debugging

	IMPORT_C virtual void WriteInternalStateL(RWriteStream& aWriteStream) const;

private: // reserved

	IMPORT_C virtual void Reserved_2();

public: // but not exported

	void ProcessPointerEventL(const TPointerEvent& aPointerEvent);

	void ProcessPointerBufferReadyL();

	void RecursivelyMergeInputCapabilities(TCoeInputCapabilities& aInputCapabilities) const;

	void WriteInternalStateNowL(RWriteStream& aWriteStream) const;

    void NotifyFontChange(const CCoeFontProvider* aFontProvider);

    void RemoveFromParent();

    void RefetchPixelMappingL();

public: // deprecated

	inline TInt SetGc(CWindowGc* aGraphicsContext) const;

	inline CWindowGc* GetGc() const;

private:

	friend class CCoeRedrawer;

	void DrawWindowOwningComponentsNow() const;

	void SetGrabbed(TBool aGrabbed, TInt aPointerNumber);

	TBool IsGrabbed(TInt aPointerNumber = 0) const;

	void DoMakeVisible(TBool aVisible);

	void CheckPointerEventPurge() const;

	void RecursivelyMergeTextDrawers(CCoeTextDrawerBase*& aTextDrawer, const CCoeControl* aDrawingControl, TInt aKey) const;

	CCoeControl* WindowOwningParent();

	const CCoeControl* WindowOwningParent() const { return const_cast<CCoeControl*>(this)->WindowOwningParent(); }

	const CCoeControl* SearchParent(const CCoeControl* aParentToFind) const;

	TInt SetZoomWithType(TCoeZoomWithType* aZoomWithType);

	TCoeZoomWithType* GetZoomWithType() const;

	TInt SetFontProvider(const CCoeFontProvider* aFontProvider);

	const CCoeFontProvider* GetFontProvider() const;

	TInt FindColor(TInt aLogicalColor) const;

	void ActivateGcRecursive() const;

	void DeactivateGcRecursive() const;

	void ReportControlStateChange(MCoeControlStateObserver::TCoeState aType);

	TInt ValidateAdvancedPointerNumber( const TPointerEvent& aPointerEvent ) const;

	void ControlClaimPointerGrab(TInt aPointerNumber);

public:	

	IMPORT_C void EnableReportControlStateChange(TBool aState);

protected:

	CCoeEnv* iCoeEnv;

	MCoeControlContext* iContext;	// deprecated

	TPoint iPosition;

	TSize iSize;

private:

	TInt iFlags;

	RDrawableWindow* iWin;

	CCoeControlStorage* iData;

	MObjectProvider* iMopParent;

	};

/** 

Gets the control environment object for this control.

@return The control's control environment object. 

*/

inline CCoeEnv* CCoeControl::ControlEnv() const

	{ return(iCoeEnv); }

/**

Deprecated. See CCoeControl::SetCustomGc().

@deprecated

*/

inline TInt CCoeControl::SetGc(CWindowGc* aGraphicsContext) const

	{ return const_cast<CCoeControl*>(this)->SetCustomGc(aGraphicsContext); }

/**

Deprecated. See CCoeControl::CustomGc().

@deprecated

*/

inline CWindowGc* CCoeControl::GetGc() const

	{ return CustomGc(); }

#endif	// __COECNTRL_H__