void BeginMouseSelection(object sender, MouseEventArgs e)
{
_mouseDown = true;
if(!_shiftDown)
{
_bpiStart = new BytePositionInfo(_hexBox._bytePos, _hexBox._byteCharacterPos);
_hexBox.ReleaseSelection();
}
else
{
UpdateMouseSelection(this, e);
}
}
void UpdateMouseSelection(object sender, MouseEventArgs e)
{
if(!_mouseDown)
return;
_bpi = GetBytePositionInfo(new Point(e.X, e.Y));
long selEnd = _bpi.Index;
long realselStart;
long realselLength;
if(selEnd < _bpiStart.Index)
{
realselStart = selEnd;
realselLength = _bpiStart.Index - selEnd;
}
else if(selEnd > _bpiStart.Index)
{
realselStart = _bpiStart.Index;
realselLength = selEnd - realselStart;
}
else
{
realselStart = _hexBox._bytePos;
realselLength = 0;
}
if(realselStart != _hexBox._bytePos || realselLength != _hexBox._selectionLength)
{
_hexBox.InternalSelect(realselStart, realselLength);
}
}
protected virtual bool PreProcessWmKeyDown_ShiftShiftKey(ref Message m)
{
if(_mouseDown)
return true;
if(_shiftDown)
return true;
_shiftDown = true;
if(_hexBox._selectionLength > 0)
return true;
_bpiStart = new BytePositionInfo(_hexBox._bytePos, _hexBox._byteCharacterPos);
return true;
}
