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Fix handling keys also used as accelerators in wxMSW wxComboBox

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wxComboBox::MSWShouldPreProcessMessage() didn't take into account many
keys that must be handled in wxComboBox even if they're used as
accelerators, including plain (i.e. without Ctrl modifier) Delete, Home
and End that are used by the embedded text control, if there is one.

Fix this by reusing wxTextCtrl::MSWShouldPreProcessMessage() which
already handled these keys correctly, by moving it to wxTextEntry, which
can be used from both classes.

Also add a check for wxCB_READONLY to prevent overriding the
accelerators using the keys that the combobox doesn't need when there is
no text control in it.

Closes #19227.
This commit is contained in:
Vadim Zeitlin
2021-07-23 16:59:08 +01:00
parent af019685da
commit 8004002e5e
4 changed files with 94 additions and 88 deletions
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85
src/msw/textctrl.cpp
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@@ -2058,80 +2058,29 @@ void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* msg)
{
// check for our special keys here: if we don't do it and the parent frame
// uses them as accelerators, they wouldn't work at all, so we disable
// usual preprocessing for them
if ( msg->message == WM_KEYDOWN )
// Handle keys specific to (multiline) text controls here.
if ( msg->message == WM_KEYDOWN && !(HIWORD(msg->lParam) & KF_ALTDOWN) )
{
const WPARAM vkey = msg->wParam;
if ( HIWORD(msg->lParam) & KF_ALTDOWN )
switch ( msg->wParam )
{
// Alt-Backspace is accelerator for "Undo"
if ( vkey == VK_BACK )
return false;
}
else // no Alt
{
// we want to process some Ctrl-foo and Shift-bar but no key
// combinations without either Ctrl or Shift nor with both of them
// pressed
const int ctrl = wxIsCtrlDown(),
shift = wxIsShiftDown();
switch ( ctrl + shift )
{
default:
wxFAIL_MSG( wxT("how many modifiers have we got?") );
wxFALLTHROUGH;
case VK_RETURN:
// This key must be handled only by multiline controls and only
// if it's pressed on its own, not with some modifier.
if ( !wxIsShiftDown() && !wxIsCtrlDown() && IsMultiLine() )
return false;
break;
case 0:
switch ( vkey )
{
case VK_RETURN:
// This one is only special for multi line controls.
if ( !IsMultiLine() )
break;
wxFALLTHROUGH;
case VK_DELETE:
case VK_HOME:
case VK_END:
return false;
}
wxFALLTHROUGH;
case 2:
break;
case 1:
// either Ctrl or Shift pressed
if ( ctrl )
{
switch ( vkey )
{
case 'A':
case 'C':
case 'V':
case 'X':
case VK_INSERT:
case VK_DELETE:
case VK_HOME:
case VK_END:
return false;
case VK_BACK:
if ( MSWNeedsToHandleCtrlBackspace() )
return false;
}
}
else // Shift is pressed
{
if ( vkey == VK_INSERT || vkey == VK_DELETE )
return false;
}
}
case VK_BACK:
if ( wxIsCtrlDown() && !wxIsShiftDown() &&
MSWNeedsToHandleCtrlBackspace() )
return false;
break;
}
}
return wxControl::MSWShouldPreProcessMessage(msg);
// Delegate all the other checks to the base classes.
return wxTextEntry::MSWShouldPreProcessMessage(msg) &&
wxControl::MSWShouldPreProcessMessage(msg);
}
void wxTextCtrl::OnChar(wxKeyEvent& event)