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

/*
Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of Nokia Corporation nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Description:  
*/

#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();
        }       

---