How to create a text object ?

[hydlx]

I want to use the method CEikEdwin::TextLength ( )

In the SDK help ,it is:
IMPORT_C TInt CEikEdwin::TextLength ( ) const

Gets the number of characters in the Edwin control.
Returns:
the number of characters in the Edwin
Remarks:
A text object must exist prior to this call

But I don't know how to create a text object , which method should I use?

[symbianyucca]

have you just tried on using it with fully constructed Edwin (or derived class), most likely Edwin constructs the text object when you call its construct functions.

yucca

[hydlx]

yes, I have put some character into the Edwin , but when I use the TextLength(), it crash :(

[symbianyucca]

hmm, interesting. Maybe you could then try a workaround solutions, something like this:

TInt TestLength = iMyEdwin->Text()->DocumentLength();

yucca

[hydlx]

Thank you !I will have a try.

[hydlx]

My application crash too though I used the code:
TInt TestLength = iMyEdwin->Text()->DocumentLength();
instead of TextLength() to get the text length, why?

[symbianyucca]

Ok then, what is the error code shown during the crash ?
Which line is causing it ?

And how do you construct your editor ?

yucca

[hydlx]

my text editor construct:
in ConstrucL()
{
TResourceReader reader;
iCoeEnv->CreateResourceReaderLC(reader, TESTVIEWAPP_VIEW);
iEdwin = new (ELeave) CEikEdwin;
iEdwin->CreatePreAllocatedScrollBarFrameL();
iEdwin->SetContainerWindowL(*this);
iEdwin->ConstructFromResourceL(reader);
iEdwin->ScrollBarFrame()->SetScrollBarVisibilityL(CEikScrollBarFrame::EOff,CEikScrollBarFrame::EAuto);
iEdwin->ScrollBarFrame()->SetTypeOfVScrollBar(CEikScrollBarFrame::EArrowHead);
iEdwin->ScrollBarFrame()->DrawScrollBarsNow();
CleanupStack::PopAndDestroy(); // Resource reader
iEdwin->SetExtent(TPoint(EDWIN_STARTPOINT_X,EDWIN_STARTPOINT_Y), TSize(EDWIN_SIZE_WIDTH,EDWIN_SIZE_HEIGHT));
}
And my new method:
void CMyView::AppendTextL(const TDesC &aText)
{
TInt len = iEdwin->TextLength();
iEdwin->InsertDeleteCharsL(len, aText, TCursorSelection(0, 0));
iEdwin->SetCursorPosL(len+aText.Length(), EFalse);

}
I set the break point at InsertDeleteCharsL(),there are a messagebox"The thread has existed"

[symbianyucca]

hmm, I think I have never used that inserting function. Uusually I define separate RichText object and use that5 for inserting stuff into the edwin. Anyway, maybe you could use the plaintext object from edwin directly to add text into it, by doing something like this:

iMyEdwin->Text()->InsertL(iMyEdwin->Text()->DocumentLength(),aText);

yucca

[hydlx]

Thank you!symbianyucca, you are No1! Your method works. :)