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How to create a Text Editor in Symbian

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Article Metadata
Platform Security
Signing Required: Self-Signed
Capabilities: None
Article
Created: symbianyucca (04 Apr 2007)
Last edited: hamishwillee (10 Oct 2012)

This article shows how to add a rich text editor to your Symbian C++ application.

The example defines CEditorContainer, a simple container which you can use to add the editor into your project. To modify the font used with the editor you can select another font in the CreateEditorL() method instead of LatinBold16(). The font color can be set by changing the KRgbBlack constant used in the TCharFormat.

Note that using a rich text editor can cause wasted resources if you don't need different paragraph or character formatting. In these cases you should use CEikEdwin which will allow you to set the font and color for the whole text. Also you could use CEikRichTextEditor directly or derive from it rather than using a container within a container.


Contents

Link against:

avkon.lib eikcoctl.lib eikctl.lib form.lib uiklaf.lib


Header Required:

#include <eikrted.h>


Required capabilities:

None

Editor_Container.cpp

#include<Editor_container.h>
void CEditorContainer::ConstructL(void)
{
CreateWindowL();
 
SetRect(CEikonEnv::Static()->EikAppUi()->ClientRect());
 
CreateEditorL();
 
ActivateL();
}
 
void CEditorContainer::CreateEditorL(void)
{
iEditor = new (ELeave) CEikRichTextEditor;
iEditor->SetAknEditorFlags(EAknEditorFlagEnableScrollBars);
iEditor->SetContainerWindowL(*this);
iEditor->SetAvkonWrap(ETrue);
iEditor->ConstructL(this,0,0,0);
 
iEditor->SetFocus(ETrue);
iEditor->EnableCcpuSupportL(ETrue);
iEditor->SetCursorPosL(0, EFalse);
iEditor->SetAvkonWrap(ETrue);
 
TFontSpec fontspec = LatinBold16()->FontSpecInTwips();
TCharFormat charFormat( fontspec.iTypeface.iName, fontspec.iHeight );
TCharFormatMask charFormatMask;
 
charFormat.iFontPresentation.iTextColor = KRgbBlack;
charFormatMask.SetAttrib(EAttColor);
 
charFormatMask.SetAttrib(EAttFontTypeface);
charFormatMask.SetAttrib(EAttFontHeight);
iEditor->ApplyCharFormatL(charFormat, charFormatMask);
 
iEditor->UpdateScrollBarsL();
SizeChanged();
}
 
 
CEditorContainer::~CEditorContainer()
{
delete iEditor;
}
 
void CEditorContainer::HandleResourceChange(TInt aType)
{
TRect rect;
 
if ( aType==KEikDynamicLayoutVariantSwitch )
{
AknLayoutUtils::LayoutMetricsRect( AknLayoutUtils::EMainPane, rect );
SetRect(rect);
}
 
CCoeControl::HandleResourceChange(aType);
}
 
void CEditorContainer::SizeChanged()
{
TRect rect = Rect();
 
if(iEditor)
{
#ifdef __SERIES60_3X__
TRect ScrollBarRect = iEditor->ScrollBarFrame()->VerticalScrollBar()->Rect();
iEditor->SetExtent(TPoint(0,StatusLineHeight),
TSize(rect.Width()-ScrollBarRect.Width(), rect.Height()-StatusLineHeight));
#else
iEditor->SetExtent(TPoint(0,StatusLineHeight),
TSize(rect.Width(), rect.Height()-StatusLineHeight));
#endif
}
}
 
TInt CEditorContainer::CountComponentControls() const
{
if(iEditor)
{
return 1;
}
else
{
return 0;
}
}
 
CCoeControl* CEditorContainer::ComponentControl(TInt /*aIndex*/) const
{
return iEditor;
}
 
void CEditorContainer::Draw(const TRect& aRect) const
{
CWindowGc& gc = SystemGc();
gc.Clear();
}
 
TKeyResponse CEditorContainer::OfferKeyEventL(const TKeyEvent& aKeyEvent,
TEventCode aType)
{
TKeyResponse Ret(EKeyWasNotConsumed);
 
if (iEditor)
{
Ret = iEditor->OfferKeyEventL(aKeyEvent, aType);
}
 
return Ret;
}
 
void CEditorContainer::SetEditorTextL(const TDesC& aText)
{
if (iEditor)
{
iEditor->ClearSelectionL();
iEditor->RichText()->Reset();
 
iEditor->RichText()->InsertL(0,aText);
iEditor->RichText()->InsertL(iEditor->RichText()->LdDocumentLength(),CEditableText::ELineBreak);
 
iEditor->UpdateScrollBarsL();
iEditor->DrawNow();
}
}

Editor_Container.h

class CEditorContainer : public CCoeControl
{
public:
void ConstructL(void);
~CEditorContainer();
void SetEditorTextL(const TDesC& aText);
public:
TInt CountComponentControls() const;
CCoeControl* ComponentControl(TInt aIndex) const;
TKeyResponse OfferKeyEventL(const TKeyEvent& aKeyEvent,TEventCode aType);
private:
void CreateEditorL(void);
virtual void SizeChanged();
virtual void HandleResourceChange(TInt aType);
void Draw(const TRect& aRect) const;
private:
CEikRichTextEditor* iEditor;
};
This page was last modified on 10 October 2012, at 08:05.
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