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examples/AppFramework/UIControls/ControlFramework/src/ControlFrameworkView.cpp

// Copyright (c) 2006-2009 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:
// ControlFrameworkAppView.cpp
//

#include <eikenv.h>
#include <controlframework.rsg>

#include "ControlFrameworkView.h"
#include "ControlFrameworkAppUi.h"
#include "ControlFrameworkGlobals.h"

// Maximum number of lines that the text can be split into 
const TInt KMaxLines = 2;
// Maximum number of characters that the text object can hold
const TInt KMaxStringLength = 64;
_LIT(KPointerEventMessage, "Pointer event %d at (%d,%d)");
_LIT(KKeyEventMessage, "Key 0x%x, modifier 0x%x");

CControlFrameworkView::CControlFrameworkView(CControlFrameworkAppUi& aAppUi) : iAppUi(aAppUi), iFont(TCoeFont::ELarge, TCoeFont::EPlain)
        {
        }

CControlFrameworkView* CControlFrameworkView::NewLC(CControlFrameworkAppUi& aAppUi)
        {
        CControlFrameworkView* view = new(ELeave) CControlFrameworkView(aAppUi);
        CleanupStack::PushL(view);
        return view;
        }

CControlFrameworkView::~CControlFrameworkView()
        {
        iRunInfoArray.Close();
        delete iBidiText;
        }

// Called by the UI framework the first time the view is activated.
// As much as possible of the code normally found in ConstructL() has 
// been moved here to improve application startup time.
void CControlFrameworkView::ViewConstructL()
        {
        // The control is window-owning.
        CreateWindowL();

        iBidiText = TBidiText::NewL(KMaxStringLength, KMaxLines);
        iRunInfoArray.OpenL();
        HBufC* message = iEikonEnv->AllocReadResourceLC(R_WELCOME_TEXT);
        iBidiText->SetText(*message, iRunInfoArray); // TDirectionality determined by resource
        CleanupStack::PopAndDestroy(message);
        
        // Set extent of the view. ClientRect calculates to ScreenSize minus Toolbar, Menubar, Statusbar etc.
        SetRect(iAppUi.ClientRect());
        
        // The control is ready to draw, so notify the UI framework.
        ActivateL();
        }       


// Uniquely identifies the view 
TVwsViewId CControlFrameworkView::ViewId() const
        {
        return TVwsViewId(KUidControlFrameworkAppUid, KUidControlFrameworkView);
        }


void CControlFrameworkView::ViewActivatedL(const TVwsViewId& /*aPrevViewId*/, TUid /*aCustomMessageId*/, const TDesC8& /*aCustomMessage*/)
        {
        }

void CControlFrameworkView::ViewDeactivated()
        {
        }

// Receives pointer events and prepares to write a description of 
// the pointer event to the screen.
void CControlFrameworkView::HandlePointerEventL(const TPointerEvent& aPointerEvent)
        {
        TBuf<KMaxStringLength> text;
        text.Format(KPointerEventMessage, aPointerEvent.iType,aPointerEvent.iPosition.iX,aPointerEvent.iPosition.iY);
        iBidiText->SetText(text, TBidiText::ELeftToRight, iRunInfoArray);
        Window().Invalidate();
        }

// Draws the border and the message text
void CControlFrameworkView::Draw(const TRect& aRect) const
        {
        TRect rect = aRect;
        DrawBorder(rect);
        DrawMessage(rect);
        }

// Draws a 5 pixel wide border around the window 
void CControlFrameworkView::DrawBorder(TRect& aRect) const
        {
        CWindowGc& gc=SystemGc();
        gc.SetPenSize(TSize(5,5));
        gc.DrawRect(aRect);
        aRect.Shrink(5,5);
        }

// Displays the message stored in iBidiText centered vertically and horizontally.
void CControlFrameworkView::DrawMessage(const TRect& aRect) const
        {
        CWindowGc& gc=SystemGc();

        if (IsStrikethrough())
                gc.SetStrikethroughStyle(EStrikethroughOn);
        
        if (IsUnderline())
                gc.SetUnderlineStyle(EUnderlineOn);

        XCoeTextDrawer textDrawer(TextDrawer());
        textDrawer->SetAlignment(EHCenterVCenter);
        const CFont& font = ScreenFont(iFont);
        iBidiText->WrapText((aRect.iBr.iX - aRect.iTl.iX) , font, NULL, KMaxLines);
        textDrawer.DrawText(gc, *iBidiText, aRect, font);
        }

/*
Moves the window and prints key event information to the screen.
The following key combinations cause the window to move: 
1. Shift + KeyLeft arrow
2. Shift + KeyRight arrow
3. Shift + KeyDown arrow
4. Shift + KeyUp arrow
*/
TKeyResponse CControlFrameworkView::OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType)
        {
        if (aType == EEventKey)
                {
                TInt modifiers=aKeyEvent.iModifiers;
                TInt code=aKeyEvent.iCode;

                // Write a description of the key event to the screen
                TBuf<KMaxStringLength> text;
                text.Format(KKeyEventMessage, code,modifiers);
                iBidiText->SetText(text, TBidiText::ELeftToRight, iRunInfoArray);
                Window().Invalidate();
                
                if (modifiers&EModifierShift)
                        {
                        TPoint pos=Position();
                        switch (code)
                                {
                                case EKeyLeftArrow:
                                        pos.iX--;
                                        break;
                                case EKeyRightArrow:
                                        pos.iX++;
                                        break;
                                case EKeyUpArrow:
                                        pos.iY--;
                                        break;
                                case EKeyDownArrow:
                                        pos.iY++;
                                        break;
                                default:
                                        break;
                                }
                        if (pos != Position())
                                {
                                SetPosition(pos);
                                return(EKeyWasConsumed);
                                }
                        }
                }
        return(EKeyWasNotConsumed);
        }

TBool CControlFrameworkView::IsStrikethrough() const
        {
        return iFontFlags.IsSet(EStrikethrough);
        }

void CControlFrameworkView::ToggleStrikethrough()
        {
        if (IsStrikethrough())
                iFontFlags.Clear(EStrikethrough);
        else 
                iFontFlags.Set(EStrikethrough);
        
        Window().Invalidate();
        }     
        
TBool CControlFrameworkView::IsUnderline() const
        { 
        return iFontFlags.IsSet(EUnderline);
        }

void CControlFrameworkView::ToggleUnderline()
        {
        if (IsUnderline())
                iFontFlags.Clear(EUnderline);
        else 
                iFontFlags.Set(EUnderline);
        
        Window().Invalidate();
        } 
        
TBool CControlFrameworkView::IsBold() const
        {
        return iFontFlags.IsSet(EBold);
        }

void CControlFrameworkView::ToggleBold()
        {
        if (IsBold())
                {
                iFontFlags.Clear(EBold);
                iFontFlags.Clear(EItalic);
                iFont = TCoeFont(iFont.LogicalSize(), TCoeFont::EPlain);
                }
        else 
                {
                iFontFlags.Set(EBold);
                iFontFlags.Clear(EItalic);
                iFont = TCoeFont(iFont.LogicalSize(), TCoeFont::EBold);
                }
        
        Window().Invalidate();
        }     
        
TBool CControlFrameworkView::IsItalic() const
        {
        return iFontFlags.IsSet(EItalic);
        }
    

void CControlFrameworkView::ToggleItalic()
        {
        if (IsItalic())
                {
                iFontFlags.Clear(EBold);
                iFontFlags.Clear(EItalic);
                iFont = TCoeFont(iFont.LogicalSize(), TCoeFont::EPlain);
                }
        else 
                {       
                iFontFlags.Set(EItalic);
                iFontFlags.Clear(EBold);
                iFont = TCoeFont(iFont.LogicalSize(), TCoeFont::EItalic);
                }
                
        Window().Invalidate();
        }       

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Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License v1.0.