Allow changing alignment styles after wxTextCtrl creation (wxOSX)

Update NSTextView/NSTextField alignment mode when wxTextCtrl alignment styles are changed with SetWindowStyleFlag().

Closes #17952.

docs/changes.txt

@@ -241,6 +241,7 @@ wxOSX:
 - Add support for wxTE_CHARWRAP style to wxTextCtrl.
 - Fix selecting RGB bitmaps (with no alpha channel) into wxMemoryDC.
 - Fix updating radio groups when menu item is inserted/removed from wxMenu.
+- Allow changing alignment styles after wxTextCtrl creation (Andreas Falkenhahn).
 
 Unix:
 

include/wx/osx/cocoa/private/textimpl.h

@@ -69,6 +69,7 @@ public :
     virtual void WriteText(const wxString& str) wxOVERRIDE ;
     virtual bool HasOwnContextMenu() const wxOVERRIDE { return true; }
     virtual bool SetHint(const wxString& hint) wxOVERRIDE;
+    virtual void SetJustification() wxOVERRIDE;
 
     virtual void controlAction(WXWidget slf, void* _cmd, void *sender) wxOVERRIDE;
     virtual bool becomeFirstResponder(WXWidget slf, void *_cmd) wxOVERRIDE;
@@ -125,6 +126,7 @@ public:
     virtual void EnableAutomaticDashSubstitution(bool enable) wxOVERRIDE;
 
     virtual wxSize GetBestSize() const wxOVERRIDE;
+    virtual void SetJustification() wxOVERRIDE;
 
     virtual void controlTextDidChange() wxOVERRIDE;
 

include/wx/osx/core/private.h

@@ -695,6 +695,7 @@ public :
     virtual wxSize GetBestSize() const { return wxDefaultSize; }
 
     virtual bool SetHint(const wxString& WXUNUSED(hint)) { return false; }
+    virtual void SetJustification();
 private:
     wxTextEntry * const m_entry;
 

include/wx/osx/textctrl.h

@@ -100,6 +100,7 @@ public:
     virtual void Command(wxCommandEvent& event) wxOVERRIDE;
 
     virtual bool AcceptsFocus() const wxOVERRIDE;
+    virtual void SetWindowStyleFlag(long style) wxOVERRIDE;
 
     // callbacks
     void OnDropFiles(wxDropFilesEvent& event);

interface/wx/textctrl.h

@@ -1004,9 +1004,10 @@ public:
     @endStyleTable
 
     Note that alignment styles (wxTE_LEFT, wxTE_CENTRE and wxTE_RIGHT) can be
-    changed dynamically after control creation on wxMSW and wxGTK. wxTE_READONLY,
-    wxTE_PASSWORD and wrapping styles can be dynamically changed under wxGTK but
-    not wxMSW. The other styles can be only set during control creation.
+    changed dynamically after control creation on wxMSW, wxGTK and wxOSX.
+    wxTE_READONLY, wxTE_PASSWORD and wrapping styles can be dynamically changed
+    under wxGTK but not wxMSW. The other styles can be only set during control
+    creation.
 
 
     @section textctrl_text_format wxTextCtrl Text Format

src/osx/cocoa/textctrl.mm

@@ -1142,6 +1142,23 @@ wxSize wxNSTextViewControl::GetBestSize() const
     return wxSize(0,0);
 }
 
+void wxNSTextViewControl::SetJustification()
+{
+    if ( !m_textView )
+        return;
+
+    NSTextAlignment align;
+
+    if ( m_wxPeer->HasFlag(wxTE_RIGHT) )
+        align = NSRightTextAlignment;
+    else if ( m_wxPeer->HasFlag(wxTE_CENTRE) )
+        align = NSCenterTextAlignment;
+    else // wxTE_LEFT == 0
+        align = NSLeftTextAlignment;
+
+    [m_textView setAlignment:align];
+}
+
 // wxNSTextFieldControl
 
 wxNSTextFieldControl::wxNSTextFieldControl( wxTextCtrl *text, WXWidget w )
@@ -1425,6 +1442,23 @@ bool wxNSTextFieldControl::SetHint(const wxString& hint)
     return true;
 }
 
+void wxNSTextFieldControl::SetJustification()
+{
+    if ( !m_textField )
+        return;
+
+    NSTextAlignment align;
+
+    if ( m_wxPeer->HasFlag(wxTE_RIGHT) )
+        align = NSRightTextAlignment;
+    else if ( m_wxPeer->HasFlag(wxTE_CENTRE) )
+        align = NSCenterTextAlignment;
+    else // wxTE_LEFT == 0
+        align = NSLeftTextAlignment;
+
+    [m_textField setAlignment:align];
+}
+
 //
 //
 //

src/osx/textctrl_osx.cpp

@@ -482,6 +482,17 @@ void wxTextCtrl::Command(wxCommandEvent & event)
     ProcessCommand(event);
 }
 
+void wxTextCtrl::SetWindowStyleFlag(long style)
+{
+    long styleOld = GetWindowStyleFlag();
+
+    wxTextCtrlBase::SetWindowStyleFlag(style);
+
+    static const long flagsAlign = wxTE_LEFT | wxTE_CENTRE | wxTE_RIGHT;
+    if ( (style & flagsAlign) != (styleOld & flagsAlign) )
+        GetTextPeer()->SetJustification();
+}
+
 // ----------------------------------------------------------------------------
 // standard handlers for standard edit menu events
 // ----------------------------------------------------------------------------
@@ -774,4 +785,7 @@ int wxTextWidgetImpl::GetLineLength(long lineNo) const
     return 0 ;
 }
 
+void wxTextWidgetImpl::SetJustification()
+{
+}
 #endif // wxUSE_TEXTCTRL