From f86190702bb433f139dc2c335e2c551755def81f Mon Sep 17 00:00:00 2001
From: Stefan Csomor <csomor@advancedconcepts.ch>
Date: Mon, 17 Jun 2013 17:41:34 +0000
Subject: [PATCH] adding magnification API into the wxWindow classes for best
 retina support

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74247 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/osx/cocoa/private.h | 2 ++
 include/wx/osx/core/private.h  | 2 ++
 include/wx/osx/nonownedwnd.h   | 2 ++
 include/wx/osx/window.h        | 2 ++
 include/wx/window.h            | 5 +++++
 src/osx/cocoa/nonownedwnd.mm   | 5 +++++
 src/osx/nonownedwnd_osx.cpp    | 5 +++++
 src/osx/window_osx.cpp         | 7 +++++++
 8 files changed, 30 insertions(+)

diff --git a/include/wx/osx/cocoa/private.h b/include/wx/osx/cocoa/private.h
index b99e9dae19..d5008ee052 100644
--- a/include/wx/osx/cocoa/private.h
+++ b/include/wx/osx/cocoa/private.h
@@ -247,6 +247,8 @@ public :
 
     virtual void WindowToScreen( int *x, int *y );
 
+    virtual double GetMagnificationFactor() const;
+
     virtual bool IsActive();
 
     virtual void SetModified(bool modified);
diff --git a/include/wx/osx/core/private.h b/include/wx/osx/core/private.h
index f6fe11ee68..c93a02c7ea 100644
--- a/include/wx/osx/core/private.h
+++ b/include/wx/osx/core/private.h
@@ -873,6 +873,8 @@ public :
     virtual void ScreenToWindow( int *x, int *y ) = 0;
 
     virtual void WindowToScreen( int *x, int *y ) = 0;
+    
+    virtual double GetMagnificationFactor() const { return 1.0; }
 
     virtual bool IsActive() = 0;
 
diff --git a/include/wx/osx/nonownedwnd.h b/include/wx/osx/nonownedwnd.h
index a972612b2b..273cf5ddc0 100644
--- a/include/wx/osx/nonownedwnd.h
+++ b/include/wx/osx/nonownedwnd.h
@@ -65,6 +65,8 @@ public:
     virtual void UnsubclassWin();
 
     virtual wxPoint GetClientAreaOrigin() const;
+    
+    virtual double GetMagnificationFactor() const;
 
     // implement base class pure virtuals
 
diff --git a/include/wx/osx/window.h b/include/wx/osx/window.h
index 57afc42463..69f910a574 100644
--- a/include/wx/osx/window.h
+++ b/include/wx/osx/window.h
@@ -97,6 +97,8 @@ public:
 
     virtual int GetCharHeight() const;
     virtual int GetCharWidth() const;
+    
+    virtual double GetMagnificationFactor() const;
 
 public:
     virtual void SetScrollbar( int orient, int pos, int thumbVisible,
diff --git a/include/wx/window.h b/include/wx/window.h
index a5cc6c4fa5..8376fb7731 100644
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -521,6 +521,11 @@ public:
         return wxSize( wxMax( client.x, best.x ), wxMax( client.y, best.y ) );
     }
 
+    // returns the magnification of the backing store of this window
+    // eg 2.0 for a window on a retina screen
+    virtual double GetMagnificationFactor() const
+    { return 1.0; }
+    
     // return the size of the left/right and top/bottom borders in x and y
     // components of the result respectively
     virtual wxSize GetWindowBorderSize() const;
diff --git a/src/osx/cocoa/nonownedwnd.mm b/src/osx/cocoa/nonownedwnd.mm
index 030b1e6a23..7ca8cf85f5 100644
--- a/src/osx/cocoa/nonownedwnd.mm
+++ b/src/osx/cocoa/nonownedwnd.mm
@@ -1035,6 +1035,11 @@ void wxNonOwnedWindowCocoaImpl::WindowToScreen( int *x, int *y )
         *y = p.y;
 }
 
+double wxNonOwnedWindowCocoaImpl::GetMagnificationFactor() const
+{
+    return [m_macWindow backingScaleFactor];
+}
+
 bool wxNonOwnedWindowCocoaImpl::IsActive()
 {
     return [m_macWindow isKeyWindow];
diff --git a/src/osx/nonownedwnd_osx.cpp b/src/osx/nonownedwnd_osx.cpp
index edcba5d9ce..183fe42d7f 100644
--- a/src/osx/nonownedwnd_osx.cpp
+++ b/src/osx/nonownedwnd_osx.cpp
@@ -478,6 +478,11 @@ void wxNonOwnedWindow::DoGetClientSize( int *width, int *height ) const
        *height = h ;
 }
 
+double wxNonOwnedWindow::GetMagnificationFactor() const
+{
+    return m_nowpeer->GetMagnificationFactor();
+}
+
 void wxNonOwnedWindow::WindowWasPainted()
 {
     s_lastFlush = clock();
diff --git a/src/osx/window_osx.cpp b/src/osx/window_osx.cpp
index 33e376ad8d..1a44f25e42 100644
--- a/src/osx/window_osx.cpp
+++ b/src/osx/window_osx.cpp
@@ -877,6 +877,13 @@ void wxWindowMac::DoGetClientSize( int *x, int *y ) const
        *y = hh;
 }
 
+double wxWindowMac::GetMagnificationFactor() const
+{
+    wxNonOwnedWindow* tlw = MacGetTopLevelWindow() ;
+    wxCHECK_MSG( tlw , 1.0, wxT("TopLevel Window missing") ) ;
+    return tlw->GetMagnificationFactor();    
+}
+
 bool wxWindowMac::SetCursor(const wxCursor& cursor)
 {
     if (m_cursor.IsSameAs(cursor))