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[wxWidgets.git] / src / cocoa / dc.mm

diff --git a/src/cocoa/dc.mm b/src/cocoa/dc.mm
index 66702e5abc0194c37f90b79b6bfc2281954e4fe5..b6ee3bf591301e93d35f4570f356e20fd568c7b8 100644 (file)
--- a/src/cocoa/dc.mm
+++ b/src/cocoa/dc.mm
@@ -28,6 +28,7 @@
 #import <AppKit/NSTypesetter.h>
 #import <AppKit/NSImage.h>
 
+#include "wx/math.h" //math constants
 #include "wx/listimpl.cpp"
 WX_DEFINE_LIST(wxCocoaDCStack);
 
@@ -140,13 +141,13 @@ bool wxDC::CocoaUnwindStackAndTakeFocus()
 
 wxDC::wxDC(void)
 {
-    m_cocoaFlipped = false;
-    m_cocoaHeight = 0.0;
+    m_cocoaWxToBoundsTransform = nil;
     m_pen = *wxBLACK_PEN;
 }
 
 wxDC::~wxDC(void)
 {
+    [m_cocoaWxToBoundsTransform release];
 }
 
 bool wxDC::CocoaLockFocus()
@@ -159,26 +160,49 @@ bool wxDC::CocoaUnlockFocus()
     return false;
 }
 
-void wxDC::CocoaApplyTransformations()
+/*static*/ WX_NSAffineTransform wxDC::CocoaGetWxToBoundsTransform(bool isFlipped, float height)
 {
+    NSAffineTransform *transform = nil;
     // This transform flips the graphics since wxDC uses top-left origin
-    if(!m_cocoaFlipped)
+    if(!isFlipped)
     {
         // The transform is auto released
-        NSAffineTransform *transform = [NSAffineTransform transform];
+        transform = [NSAffineTransform transform];
         /*  x' = 1x + 0y + 0
             y' = 0x + -1y + window's height
         */
         NSAffineTransformStruct matrix = {
             1,  0
         ,   0, -1
-        ,   0, m_cocoaHeight
+        ,   0, height
         };
         [transform setTransformStruct: matrix];
-        // Apply the transform 
-        [transform concat];
     }
-    // TODO: Apply scaling transformation
+    return transform;
+}
+
+void wxDC::CocoaApplyTransformations()
+{
+    [m_cocoaWxToBoundsTransform concat];
+    // TODO: Apply device/logical/user position/scaling transformations
+}
+
+void wxDC::CocoaUnapplyTransformations()
+{
+    // NOTE: You *must* call this with focus held.
+    // Undo all transforms so we're back in true Cocoa coords with
+    // no scaling or flipping.
+    NSAffineTransform *invertTransform;
+    invertTransform = [m_cocoaWxToBoundsTransform copy];
+    [invertTransform invert];
+    [invertTransform concat];
+    [invertTransform release];
+}
+
+bool wxDC::CocoaGetBounds(void *rectData)
+{
+    // We don't know what we are so we can't return anything.
+    return false;
 }
 
 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
@@ -342,17 +366,6 @@ int wxDCBase::LogicalToDeviceYRel(int y) const
 // cut here, the rest is stubs
 ///////////////////////////////////////////////////////////////////////////
 
-//-----------------------------------------------------------------------------
-// constants
-//-----------------------------------------------------------------------------
-
-#define mm2inches              0.0393700787402
-#define inches2mm              25.4
-#define mm2twips               56.6929133859
-#define twips2mm               0.0176388888889
-#define mm2pt                  2.83464566929
-#define pt2mm                  0.352777777778
-
 //-----------------------------------------------------------------------------
 // wxDC
 //-----------------------------------------------------------------------------
@@ -549,6 +562,22 @@ void wxDC::SetTextBackground( const wxColour &col )
 
 void wxDC::Clear()
 {
+    if(!CocoaTakeFocus()) return;
+
+    NSRect boundsRect;
+    if(!CocoaGetBounds(&boundsRect)) return;
+
+    NSGraphicsContext *context = [NSGraphicsContext currentContext];
+    [context saveGraphicsState];
+
+    // Undo all transforms so when we draw our bounds rect we
+    // really overwrite our bounds rect.
+    CocoaUnapplyTransformations();
+
+    [m_backgroundBrush.GetNSColor() set];
+    [NSBezierPath fillRect:boundsRect];
+
+    [context restoreGraphicsState];
 }
 
 void wxDC::SetBackground(const wxBrush& brush)