Fix text input and completion in wxComboCtrl and wxOwnerDrawnComboBox.

Both wxEVT_KEY_DOWN and wxEVT_CHAR must be handled and only the latter
used for completion (or any characters input). Don't make incorrect
assumptions about wxEVT_CHAR keycodes either, it's only the Unicode
character and printability that matter.

Otherwise, completion in readonly controls wouldn't work correctly
for e.g. numbers on numpad or non-ASCII characters.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63864 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/combo.h

@@ -523,6 +523,7 @@ protected:
     void OnTextCtrlEvent(wxCommandEvent& event);
     void OnSysColourChanged(wxSysColourChangedEvent& event);
     void OnKeyEvent(wxKeyEvent& event);
+    void OnCharEvent(wxKeyEvent& event);
 
     // Set customization flags (directs how wxComboCtrlBase helpers behave)
     void Customize( wxUint32 flags ) { m_iFlags |= flags; }
@@ -726,10 +727,14 @@ public:
     // Default implementation draws value as string.
     virtual void PaintComboControl( wxDC& dc, const wxRect& rect );
 
-    // Receives key events from the parent wxComboCtrl.
+    // Receives wxEVT_KEY_DOWN key events from the parent wxComboCtrl.
     // Events not handled should be skipped, as usual.
     virtual void OnComboKeyEvent( wxKeyEvent& event );
 
+    // Receives wxEVT_CHAR key events from the parent wxComboCtrl.
+    // Events not handled should be skipped, as usual.
+    virtual void OnComboCharEvent( wxKeyEvent& event );
+
     // Implement if you need to support special action when user
     // double-clicks on the parent wxComboCtrl.
     virtual void OnComboDoubleClick();

include/wx/odcombo.h

@@ -89,6 +89,7 @@ public:
     virtual wxSize GetAdjustedSize( int minWidth, int prefHeight, int maxHeight );
     virtual void PaintComboControl( wxDC& dc, const wxRect& rect );
     virtual void OnComboKeyEvent( wxKeyEvent& event );
+    virtual void OnComboCharEvent( wxKeyEvent& event );
     virtual void OnComboDoubleClick();
     virtual bool LazyCreate();
 
@@ -117,8 +118,8 @@ public:
 
 protected:
 
-    // Called by OnComboDoubleClick and OnComboKeyEvent
-    bool HandleKey( int keycode, bool saturate, wxChar unicode = 0 );
+    // Called by OnComboDoubleClick and OnCombo{Key,Char}Event
+    bool HandleKey( int keycode, bool saturate, wxChar keychar = 0 );
 
     // sends combobox select event from the parent combo control
     void SendComboBoxEvent( int selection );
@@ -164,6 +165,7 @@ protected:
     void OnMouseMove(wxMouseEvent& event);
     void OnMouseWheel(wxMouseEvent& event);
     void OnKey(wxKeyEvent& event);
+    void OnChar(wxKeyEvent& event);
     void OnLeftClick(wxMouseEvent& event);
 
     // Return the widest item width (recalculating it if necessary)

src/common/combocmn.cpp

@@ -465,6 +465,7 @@ private:
 BEGIN_EVENT_TABLE(wxComboPopupWindowEvtHandler, wxEvtHandler)
     EVT_KEY_DOWN(wxComboPopupWindowEvtHandler::OnKeyEvent)
     EVT_KEY_UP(wxComboPopupWindowEvtHandler::OnKeyEvent)
+    EVT_CHAR(wxComboPopupWindowEvtHandler::OnKeyEvent)
 #if USES_GENERICTLW
     EVT_ACTIVATE(wxComboPopupWindowEvtHandler::OnActivate)
 #endif
@@ -552,6 +553,11 @@ void wxComboPopup::OnComboKeyEvent( wxKeyEvent& event )
     event.Skip();
 }
 
+void wxComboPopup::OnComboCharEvent( wxKeyEvent& event )
+{
+    event.Skip();
+}
+
 void wxComboPopup::OnComboDoubleClick()
 {
 }
@@ -780,6 +786,7 @@ BEGIN_EVENT_TABLE(wxComboCtrlBase, wxControl)
     EVT_IDLE(wxComboCtrlBase::OnIdleEvent)
     //EVT_BUTTON(wxID_ANY,wxComboCtrlBase::OnButtonClickEvent)
     EVT_KEY_DOWN(wxComboCtrlBase::OnKeyEvent)
+    EVT_CHAR(wxComboCtrlBase::OnCharEvent)
     EVT_TEXT_ENTER(wxID_ANY,wxComboCtrlBase::OnTextCtrlEvent)
     EVT_SYS_COLOUR_CHANGED(wxComboCtrlBase::OnSysColourChanged)
 END_EVENT_TABLE()
@@ -1830,6 +1837,27 @@ void wxComboCtrlBase::OnKeyEvent(wxKeyEvent& event)
     }
 }
 
+void wxComboCtrlBase::OnCharEvent(wxKeyEvent& event)
+{
+    if ( IsPopupShown() )
+    {
+        // pass it to the popped up control
+        GetPopupControl()->GetControl()->GetEventHandler()->ProcessEvent(event);
+    }
+    else // no popup
+    {
+        wxComboPopup* popupInterface = GetPopupControl();
+        if ( popupInterface )
+        {
+            popupInterface->OnComboCharEvent(event);
+        }
+        else
+        {
+            event.Skip();
+        }
+    }
+}
+
 void wxComboCtrlBase::OnFocusEvent( wxFocusEvent& event )
 {
     if ( event.GetEventType() == wxEVT_SET_FOCUS )

src/generic/odcombo.cpp

@@ -54,6 +54,7 @@
 BEGIN_EVENT_TABLE(wxVListBoxComboPopup, wxVListBox)
     EVT_MOTION(wxVListBoxComboPopup::OnMouseMove)
     EVT_KEY_DOWN(wxVListBoxComboPopup::OnKey)
+    EVT_CHAR(wxVListBoxComboPopup::OnChar)
     EVT_LEFT_UP(wxVListBoxComboPopup::OnLeftClick)
 END_EVENT_TABLE()
 
@@ -244,7 +245,7 @@ void wxVListBoxComboPopup::SendComboBoxEvent( int selection )
 }
 
 // returns true if key was consumed
-bool wxVListBoxComboPopup::HandleKey( int keycode, bool saturate, wxChar unicode )
+bool wxVListBoxComboPopup::HandleKey( int keycode, bool saturate, wxChar keychar )
 {
     const int itemCount = GetCount();
 
@@ -256,19 +257,12 @@ bool wxVListBoxComboPopup::HandleKey( int keycode, bool saturate, wxChar unicode
     int value = m_value;
     int comboStyle = m_combo->GetWindowStyle();
 
-    // this is the character equivalent of the code
-    wxChar keychar = 0;
-    if ( keycode < WXK_START )
+    if ( keychar > 0 )
     {
-        if ( unicode > 0 )
-        {
-            if ( wxIsprint(unicode) )
-                keychar = unicode;
-        }
-        else if ( wxIsprint(keycode) )
-        {
-            keychar = (wxChar) keycode;
-        }
+        // we have character equivalent of the keycode; filter out these that
+        // are not printable characters
+        if ( !wxIsprint(keychar) )
+            keychar = 0;
     }
 
     if ( keycode == WXK_DOWN || keycode == WXK_NUMPAD_DOWN || keycode == WXK_RIGHT )
@@ -395,13 +389,21 @@ void wxVListBoxComboPopup::OnComboDoubleClick()
 void wxVListBoxComboPopup::OnComboKeyEvent( wxKeyEvent& event )
 {
     // Saturated key movement on
-    if ( !HandleKey(event.GetKeyCode(),true,
+    if ( !HandleKey(event.GetKeyCode(), true) )
+        event.Skip();
+}
+
+void wxVListBoxComboPopup::OnComboCharEvent( wxKeyEvent& event )
+{
+    // unlike in OnComboKeyEvent, wxEVT_CHAR contains meaningful
+    // printable character information, so pass it
 #if wxUSE_UNICODE
-        event.GetUnicodeKey()
+    const wxChar charcode = event.GetUnicodeKey();
 #else
-        0
+    const wxChar charcode = (wxChar)event.GetKeyCode();
 #endif
-        ) )
+
+    if ( !HandleKey(event.GetKeyCode(), true, charcode) )
         event.Skip();
 }
 
@@ -466,20 +468,33 @@ void wxVListBoxComboPopup::OnKey(wxKeyEvent& event)
     }
     else
     {
-        int comboStyle = m_combo->GetWindowStyle();
-        int keycode = event.GetKeyCode();
-        // Process partial completion key codes here, but not the arrow keys as the base class will do that for us
-        if ((comboStyle & wxCB_READONLY) &&
-            (keycode >= WXK_SPACE) && (keycode <=255) && (keycode != WXK_DELETE) && wxIsprint(keycode))
-        {
-            OnComboKeyEvent(event);
-            SetSelection(m_value); // ensure the highlight bar moves
-        }
-        else
-            event.Skip();
+        // completion is handled in OnChar() below
+        event.Skip();
     }
 }
 
+void wxVListBoxComboPopup::OnChar(wxKeyEvent& event)
+{
+    if ( m_combo->GetWindowStyle() & wxCB_READONLY )
+    {
+        // Process partial completion key codes here, but not the arrow keys as
+        // the base class will do that for us
+#if wxUSE_UNICODE
+        const wxChar charcode = event.GetUnicodeKey();
+#else
+        const wxChar charcode = (wxChar)event.GetKeyCode();
+#endif
+        if ( wxIsprint(charcode) )
+        {
+            OnComboCharEvent(event);
+            SetSelection(m_value); // ensure the highlight bar moves
+            return; // don't skip the event
+        }
+    }
+
+    event.Skip();
+}
+
 void wxVListBoxComboPopup::Insert( const wxString& item, int pos )
 {
     // Need to change selection?