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/***************************************************************************
kvalueeditor.cpp - description
-------------------
begin : Sa Dez 4 2004
copyright : (C) 2004 by Friedrich W. H. Kossebau
email : Friedrich.W.H@Kossebau.de
***************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
// qt specific
#include <qevent.h>
// lib specific
#include "kvaluecolumn.h"
#include "kbufferranges.h"
#include "kbuffercursor.h"
#include "khexedit.h"
#include "kvalueeditor.h"
using namespace KHE;
KValueEditor::KValueEditor( KValueColumn *VC, KBufferCursor *BC, KHexEdit* HE, KController *P )
: KEditor( BC, HE, P ),
ValueColumn( VC ),
InEditMode( false ),
EditModeByInsert( false )
{
}
bool KValueEditor::handleKeyPress( QKeyEvent *KeyEvent )
{
bool KeyUsed = true;
// TODO: for now we don't touch it if there are selections
if( !HexEdit->BufferRanges->hasSelection() )
{
//
switch( KeyEvent->key() )
{
case Qt::Key_Plus:
doValueEditAction( IncValue );
break;
case Qt::Key_Minus:
doValueEditAction( DecValue );
break;
case Qt::Key_Space:
if( !InEditMode )
{
KeyUsed = false;
break;
}
case Qt::Key_Enter:
case Qt::Key_Return:
doValueEditAction( InEditMode?LeaveValue:EnterValue );
break;
case Qt::Key_Escape:
if( InEditMode )
doValueEditAction( CancelValue );
else
KeyUsed = false;
break;
case Qt::Key_Backspace:
if( InEditMode )
doValueEditAction( ValueBackspace );
else
KeyUsed = false;
break;
default:
// is plain char?
if( KeyEvent->text().length() > 0
&& ( !(KeyEvent->state()&( Qt::ControlButton | Qt::AltButton | Qt::MetaButton )) ) )
{
QChar C = KeyEvent->text()[0];
// no usable char?
if( !C.isLetterOrNumber() )
{
KeyUsed = false;
break;
}
int Input = C.latin1();
if( InEditMode )
doValueEditAction( ValueAppend, Input );
else
{
unsigned char InputValue = 0;
const KByteCodec *ByteCodec = ValueColumn->byteCodec();
// valid digit?
if( ByteCodec->appendDigit(&InputValue,Input) )
{
if( HexEdit->OverWrite )
doValueEditAction( ValueEdit, InputValue );
else
{
int Index = BufferCursor->realIndex();
if( HexEdit->DataBuffer->insert(Index,(char*)&InputValue,1) > 0 )
{
HexEdit->pauseCursor();
HexEdit->updateLength();
InEditMode = true;
EditModeByInsert = true;
OldValue = EditValue = InputValue;
ByteCodec->encode( ByteBuffer, 0, EditValue );
BufferCursor->gotoRealIndex();
KSection ChangedRange( Index,HexEdit->DataBuffer->size()-1 );
HexEdit->BufferRanges->addChangedRange( ChangedRange );
HexEdit->repaintChanged();
HexEdit->ensureCursorVisible();
HexEdit->unpauseCursor();
HexEdit->updateCursor();
emit HexEdit->bufferChanged( ChangedRange.start(), ChangedRange.end() );
}
}
}
}
}
else
KeyUsed = false;
}
}
else
KeyUsed = false;
return KeyUsed ? true : KEditor::handleKeyPress(KeyEvent);
}
void KValueEditor::doValueEditAction( KValueEditAction Action, int Input )
{
// we are not yet in edit mode?
if( !InEditMode )
{
int ValidIndex = BufferCursor->validIndex();
// no valid cursor position?
if( ValidIndex == -1 || (!HexEdit->OverWrite && Input == -1) || BufferCursor->isBehind() )
return;
InEditMode = true;
EditModeByInsert = false; // default, to be overwritten if so
// save old value
OldValue = EditValue = (unsigned char)HexEdit->DataBuffer->datum(ValidIndex);
}
const KByteCodec *ByteCodec = ValueColumn->byteCodec();
//
unsigned char NewValue = EditValue;
bool StayInEditMode = true;
bool MoveToNext = false;
switch( Action )
{
case ValueEdit:
NewValue = Input;
EditValue = NewValue^255; // force update
EditModeByInsert = true;
break;
case ValueBackspace:
if( NewValue > 0 )
ByteCodec->removeLastDigit( &NewValue );
break;
case EnterValue:
EditValue ^= 255; // force update
break;
case IncValue:
if( NewValue < 255 )
++NewValue;
break;
case DecValue:
if( NewValue > 0 )
--NewValue;
break;
case ValueAppend:
if( ByteCodec->appendDigit(&NewValue,Input) )
if( EditModeByInsert && NewValue >= ByteCodec->digitsFilledLimit() )
{
StayInEditMode = false;
MoveToNext = true;
}
break;
case LeaveValue:
StayInEditMode = false;
MoveToNext = EditModeByInsert;
break;
case CancelValue:
NewValue = OldValue;
StayInEditMode = false;
break;
}
bool Changed = (NewValue != EditValue);
int Index = BufferCursor->index();
if( Changed )
{
// sync value
EditValue = NewValue;
ByteCodec->encode( ByteBuffer, 0, EditValue );
HexEdit->DataBuffer->replace( Index, 1, (char*)&EditValue, 1 );
}
HexEdit->updateCursor();
if( !StayInEditMode )
{
HexEdit->pauseCursor();
InEditMode = false;
if( MoveToNext )
BufferCursor->gotoNextByte();
HexEdit->unpauseCursor();
}
if( Changed )
if( Action != EnterValue ) emit HexEdit->bufferChanged( Index, Index );
}
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