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decreased text limit which we consider to be set by user (and not built in the control) to 10001 which is less than default 30000

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35005 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2005-07-29 23:01:56 +00:00
parent f3d0213e5b
commit 4fa8085100
2 changed files with 38 additions and 35 deletions
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4
include/wx/msw/textctrl.h
View File

@ -201,6 +201,10 @@ protected:
// intercept WM_GETDLGCODE
virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
// return true if this control has a user-set limit on amount of text (i.e.
// the limit is due to a previous call to SetMaxLength() and not built in)
bool HasSpaceLimit(unsigned int *len) const;
// call this to increase the size limit (will do nothing if the current
// limit is big enough)
//

69
src/msw/textctrl.cpp
View File

@ -1560,11 +1560,22 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
void wxTextCtrl::SetMaxLength(unsigned long len)
{
#if wxUSE_RICHEDIT
if (IsRich())
::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, (LPARAM) (DWORD) len);
if ( IsRich() )
{
::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, len ? len : 0x7fffffff);
}
else
#endif
::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
#endif // wxUSE_RICHEDIT
{
if ( len >= 0xffff )
{
// this will set it to a platform-dependent maximum (much more
// than 64Kb under NT)
len = 0;
}
::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
}
}
// ----------------------------------------------------------------------------
@ -1894,48 +1905,36 @@ WXHBRUSH wxTextCtrl::MSWControlColor(WXHDC hDC, WXHWND hWnd)
return wxTextCtrlBase::MSWControlColor(hDC, hWnd);
}
bool wxTextCtrl::AdjustSpaceLimit()
bool wxTextCtrl::HasSpaceLimit(unsigned int *len) const
{
unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
// HACK: we try to automatically extend the limit for the amount of text
// to allow (interactively) entering more than 64Kb of text under
// Win9x but we shouldn't reset the text limit which was previously
// set explicitly with SetMaxLength()
//
// we could solve this by storing the limit we set in wxTextCtrl but
// to save space we prefer to simply test here the actual limit
// value: we consider that SetMaxLength() can only be called for
// values < 32Kb
if ( limit < 0x8000 )
{
// we've got more text than limit set by SetMaxLength()
// Unfortunately there is no EM_GETLIMITTEXTSETBYUSER and so we don't
// know the limit we set (if any). We could solve this by storing the
// limit we set in wxTextCtrl but to save space we prefer to simply
// test here the actual limit value: we consider that SetMaxLength()
// can only be called for small values while EN_MAXTEXT is only sent
// for large values (in practice the default limit seems to be 30000
// but make it smaller just to be on the safe side)
*len = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
return *len < 10001;
}
bool wxTextCtrl::AdjustSpaceLimit()
{
unsigned int limit;
if ( HasSpaceLimit(&limit) )
return false;
}
unsigned int len = ::GetWindowTextLength(GetHwnd());
if ( len >= limit )
{
limit = len + 0x8000; // 32Kb
#if wxUSE_RICHEDIT
if ( IsRich() )
{
// as a nice side effect, this also allows passing limit > 64Kb
::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
}
else
#endif // wxUSE_RICHEDIT
{
if ( limit > 0xffff )
{
// this will set it to a platform-dependent maximum (much more
// than 64Kb under NT)
limit = 0;
}
::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
}
// increment in 32Kb chunks
SetMaxLength(len + 0x8000);
}
// we changed the limit