}
// ----------------------------------------------------------------------------
-// set this button as the default one in its panel
+// default button handling
// ----------------------------------------------------------------------------
+/*
+ "Everything you ever wanted to know about the default buttons" or "Why do we
+ have to do all this?"
+
+ In MSW the default button should be activated when the user presses Enter
+ and the current control doesn't process Enter itself somehow. This is
+ handled by ::DefWindowProc() (or maybe ::DefDialogProc()) using DM_SETDEFID
+ Another aspect of "defaultness" is that the default button has different
+ appearance: this is due to BS_DEFPUSHBUTTON style which is completely
+ separate from DM_SETDEFID stuff (!).
+
+ Final complication is that when a button is active, it should be the default
+ one, i.e. pressing Enter on a button always activates it and not another
+ one.
+
+ We handle this by maintaining a permanent and a temporary default items in
+ wxControlContainer (both may be NULL). When a button becomes the current
+ control (i.e. gets focus) it sets itself as the temporary default which
+ ensures that it has the right appearance and that Enter will be redirected
+ to it. When the button loses focus, it unsets the temporary default and so
+ the default item will be the permanent default -- that is the default button
+ if any had been set or none otherwise, which is just what we want.
+
+ Remark that we probably don't need to send DM_SETDEFID as we don't use
+ ::IsDialogMessage() (which relies on it) any longer but OTOH it probably
+ doesn't hurt neither.
+ */
+
+// set this button as the (permanently) default one in its panel
void wxButton::SetDefault()
{
wxWindow *parent = GetParent();
- wxButton *btnOldDefault;
- if ( parent )
- {
- wxWindow *winOldDefault = parent->SetDefaultItem(this);
- btnOldDefault = wxDynamicCast(winOldDefault, wxButton);
- ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ // set this one as the default button both for wxWindows and Windows
+ wxWindow *winOldDefault = parent->SetDefaultItem(this);
+ ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
+
+ UpdateDefaultStyle(this, winOldDefault);
+}
+
+void wxButton::SetTmpDefault()
+{
+ wxWindow *parent = GetParent();
+
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+ parent->SetTmpDefaultItem(this);
+ if ( winOldDefault != this )
+ {
+ UpdateDefaultStyle(this, winOldDefault);
}
- else // is a button without parent really normal?
+ //else: no styles to update
+}
+
+void wxButton::UnsetTmpDefault()
+{
+ wxWindow *parent = GetParent();
+
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ parent->SetTmpDefaultItem(NULL);
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+ if ( winOldDefault != this )
{
- btnOldDefault = NULL;
+ UpdateDefaultStyle(winOldDefault, this);
}
+ //else: we had been default before anyhow
+}
- if ( btnOldDefault && btnOldDefault != this )
+/* static */
+void
+wxButton::UpdateDefaultStyle(wxWindow *winDefault, wxWindow *winOldDefault)
+{
+ // clear the BS_DEFPUSHBUTTON for the old default button
+ wxButton *btnOldDefault = wxDynamicCast(winOldDefault, wxButton);
+ if ( btnOldDefault && btnOldDefault != winDefault )
{
// remove the BS_DEFPUSHBUTTON style from the other button
- long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
+ long style = ::GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
// don't do it with the owner drawn buttons because it will reset
// BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
{
style &= ~BS_DEFPUSHBUTTON;
- SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
+ ::SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
}
else
{
}
}
- // set this button as the default
- long style = GetWindowLong(GetHwnd(), GWL_STYLE);
- if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
+ // and set BS_DEFPUSHBUTTON for this button
+ wxButton *btnDefault = wxDynamicCast(winDefault, wxButton);
+ if ( btnDefault )
{
- style |= BS_DEFPUSHBUTTON;
- SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L);
+ long style = ::GetWindowLong(GetHwndOf(btnDefault), GWL_STYLE);
+ if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
+ {
+ style |= BS_DEFPUSHBUTTON;
+ ::SendMessage(GetHwndOf(btnDefault), BM_SETSTYLE, style, 1L);
+ }
+ else
+ {
+ btnDefault->Refresh();
+ }
}
}
long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- // when we receive focus, we want to become the default button in our
- // parent panel
+ // when we receive focus, we want to temporary become the default button in
+ // our parent panel so that pressing "Enter" would activate us -- and when
+ // losing it we should restore the previous default button as well
if ( nMsg == WM_SETFOCUS )
{
- SetDefault();
+ SetTmpDefault();
- // let the default processign take place too
+ // let the default processing take place too
+ }
+ else if ( nMsg == WM_KILLFOCUS )
+ {
+ UnsetTmpDefault();
}
else if ( nMsg == WM_LBUTTONDBLCLK )
{
// appearance - without this, it won't do it
(void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
- // and conitnue with processing the message normally as well
+ // and continue with processing the message normally as well
}
// let the base class do all real processing
projects / wxWidgets.git / blobdiff