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implemented, tested and documented wxTextCtrl::SetMaxLength()

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11383 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2001-08-15 12:45:53 +00:00
parent 2cefcb34d2
commit d7eee191c5
13 changed files with 119 additions and 12 deletions
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42
src/msw/textctrl.cpp
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@@ -878,6 +878,11 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
return str;
}
void wxTextCtrl::SetMaxLength(unsigned long len)
{
::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
}
// ----------------------------------------------------------------------------
// Undo/redo
// ----------------------------------------------------------------------------
@@ -1020,8 +1025,8 @@ bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
case EN_KILLFOCUS:
{
wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
: wxEVT_SET_FOCUS,
m_windowId);
: wxEVT_SET_FOCUS,
m_windowId);
event.SetEventObject( this );
GetEventHandler()->ProcessEvent(event);
}
@@ -1038,7 +1043,13 @@ bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
case EN_MAXTEXT:
// the text size limit has been hit - increase it
AdjustSpaceLimit();
if ( !AdjustSpaceLimit() )
{
wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
InitCommandEvent(event);
event.SetString(GetValue());
ProcessCommand(event);
}
break;
// the other notification messages are not processed
@@ -1127,11 +1138,27 @@ void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
}
#endif
void wxTextCtrl::AdjustSpaceLimit()
bool wxTextCtrl::AdjustSpaceLimit()
{
#ifndef __WIN16__
unsigned int len = ::GetWindowTextLength(GetHwnd()),
limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
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()
return FALSE;
}
unsigned int len = ::GetWindowTextLength(GetHwnd());
if ( len >= limit )
{
limit = len + 0x8000; // 32Kb
@@ -1156,6 +1183,9 @@ void wxTextCtrl::AdjustSpaceLimit()
}
}
#endif // !Win16
// we changed the limit
return TRUE;
}
bool wxTextCtrl::AcceptsFocus() const