sc: Get rid of the Idle hack in the Special Filter Dialog.

The problem is that with LOK, the creation of Idle here causes a
deadlock when the dialog is being opened and its first paint is
requested.

No real idea what change now causes the problem (this used to work), but
given that the use of the Idle is a hack in the first place, let's use
the GetFocus/LoseFocus handlers instead, and act accordingly only when
the focus of the interesting controls changes.

Change-Id: Ib6c0267a064cb31438544e47fe3e0869b575ef7c
Reviewed-on: https://gerrit.libreoffice.org/70917Reviewed-by: Aron Budea <aron.budea@collabora.com>
Tested-by: Aron Budea <aron.budea@collabora.com>

sc/source/ui/dbgui/sfiltdlg.cxx

@@ -57,8 +57,7 @@ ScSpecialFilterDlg::ScSpecialFilterDlg( SfxBindings* pB, SfxChildWindow* pCW, vc
         pViewData       ( nullptr ),
         pDoc            ( nullptr ),
         pRefInputEdit   ( nullptr ),
-        bRefInputMode   ( false ),
-        pIdle          ( nullptr )
+        bRefInputMode   ( false )
 {
         get(pLbFilterArea,"lbfilterarea");
         get(pEdFilterArea,"edfilterarea");
@@ -83,14 +82,18 @@ ScSpecialFilterDlg::ScSpecialFilterDlg( SfxBindings* pB, SfxChildWindow* pCW, vc
         get(pExpander,"more");
 
     Init( rArgSet );
-    pEdFilterArea->GrabFocus();
 
-    // hack: control of RefInput
-    pIdle = new Idle("Special Filter Dialog");
-    // FIXME: this is an abomination
-    pIdle->SetPriority( TaskPriority::LOWEST );
-    pIdle->SetInvokeHandler( LINK( this, ScSpecialFilterDlg, TimeOutHdl ) );
-    pIdle->Start();
+    Link<Control&, void> aLink = LINK(this, ScSpecialFilterDlg, RefInputControlHdl);
+    pEdCopyArea->SetGetFocusHdl(aLink);
+    pRbCopyArea->SetGetFocusHdl(aLink);
+    pEdFilterArea->SetGetFocusHdl(aLink);
+    pRbFilterArea->SetGetFocusHdl(aLink);
+    pEdCopyArea->SetLoseFocusHdl(aLink);
+    pRbCopyArea->SetLoseFocusHdl(aLink);
+    pEdFilterArea->SetLoseFocusHdl(aLink);
+    pRbFilterArea->SetLoseFocusHdl(aLink);
+
+    pEdFilterArea->GrabFocus();
 }
 
 ScSpecialFilterDlg::~ScSpecialFilterDlg()
@@ -109,10 +112,6 @@ void ScSpecialFilterDlg::dispose()
 
     delete pOutItem;
 
-    // hack: control of RefInput
-    pIdle->Stop();
-    delete pIdle;
-
     pLbFilterArea.clear();
     pEdFilterArea.clear();
     pRbFilterArea.clear();
@@ -389,11 +388,9 @@ IMPL_LINK( ScSpecialFilterDlg, EndDlgHdl, Button*, pBtn, void )
     }
 }
 
-IMPL_LINK( ScSpecialFilterDlg, TimeOutHdl, Timer*, _pIdle, void )
+IMPL_LINK_NOARG(ScSpecialFilterDlg, RefInputControlHdl, Control&, void)
 {
-    // every 50ms check whether RefInputMode is still true
-
-    if( (_pIdle == pIdle) && IsActive() )
+    if (IsActive())
     {
         if( pEdCopyArea->HasFocus() || pRbCopyArea->HasFocus() )
         {
@@ -411,8 +408,6 @@ IMPL_LINK( ScSpecialFilterDlg, TimeOutHdl, Timer*, _pIdle, void )
             bRefInputMode = false;
         }
     }
-
-    pIdle->Start();
 }
 
 IMPL_LINK( ScSpecialFilterDlg, FilterAreaSelHdl, ListBox&, rLb, void )

sc/source/ui/inc/filtdlg.hxx

@@ -206,9 +206,6 @@ private:
     VclPtr<formula::RefEdit>   pRefInputEdit;
     bool                bRefInputMode;
 
-    // Hack: RefInput control
-    Idle*  pIdle;
-
 private:
     void            Init( const SfxItemSet& rArgSet );
     ScQueryItem*    GetOutputItem( const ScQueryParam& rParam,
@@ -219,8 +216,8 @@ private:
     DECL_LINK( FilterAreaModHdl, Edit&, void );
     DECL_LINK( EndDlgHdl,  Button*, void );
 
-    // Hack: RefInput control
-    DECL_LINK( TimeOutHdl, Timer*, void );
+    // RefInput control
+    DECL_LINK( RefInputControlHdl, Control&, void );
 };
 
 #endif // INCLUDED_SC_SOURCE_UI_INC_FILTDLG_HXX