+/* note that the drawing order between siblings is not defined under 10.4 */
+/* only starting from 10.5 the subview order is respected */
+
+/* NSComparisonResult is typedef'd as an enum pre-Leopard but typedef'd as
+ * NSInteger post-Leopard. Pre-Leopard the Cocoa toolkit expects a function
+ * returning int and not NSComparisonResult. Post-Leopard the Cocoa toolkit
+ * expects a function returning the new non-enum NSComparsionResult.
+ * Hence we create a typedef named CocoaWindowCompareFunctionResult.
+ */
+#if defined(NSINTEGER_DEFINED)
+typedef NSComparisonResult CocoaWindowCompareFunctionResult;
+#else
+typedef int CocoaWindowCompareFunctionResult;
+#endif
+
+class CocoaWindowCompareContext
+{
+ wxDECLARE_NO_COPY_CLASS(CocoaWindowCompareContext);
+public:
+ CocoaWindowCompareContext(); // Not implemented
+ CocoaWindowCompareContext(NSView *target, NSArray *subviews)
+ {
+ m_target = target;
+ // Cocoa sorts subviews in-place.. make a copy
+ m_subviews = [subviews copy];
+ }
+
+ ~CocoaWindowCompareContext()
+ { // release the copy
+ [m_subviews release];
+ }
+ NSView* target()
+ { return m_target; }
+
+ NSArray* subviews()
+ { return m_subviews; }
+
+ /* Helper function that returns the comparison based off of the original ordering */
+ CocoaWindowCompareFunctionResult CompareUsingOriginalOrdering(id first, id second)
+ {
+ NSUInteger firstI = [m_subviews indexOfObjectIdenticalTo:first];
+ NSUInteger secondI = [m_subviews indexOfObjectIdenticalTo:second];
+ // NOTE: If either firstI or secondI is NSNotFound then it will be NSIntegerMax and thus will
+ // likely compare higher than the other view which is reasonable considering the only way that
+ // can happen is if the subview was added after our call to subviews but before the call to
+ // sortSubviewsUsingFunction:context:. Thus we don't bother checking. Particularly because
+ // that case should never occur anyway because that would imply a multi-threaded GUI call
+ // which is a big no-no with Cocoa.
+
+ // Subviews are ordered from back to front meaning one that is already lower will have an lower index.
+ NSComparisonResult result = (firstI < secondI)
+ ? NSOrderedAscending /* -1 */
+ : (firstI > secondI)
+ ? NSOrderedDescending /* 1 */
+ : NSOrderedSame /* 0 */;
+
+ return result;
+ }
+private:
+ /* The subview we are trying to Raise or Lower */
+ NSView *m_target;
+ /* A copy of the original array of subviews */
+ NSArray *m_subviews;
+};
+
+/* Causes Cocoa to raise the target view to the top of the Z-Order by telling the sort function that
+ * the target view is always higher than every other view. When comparing two views neither of
+ * which is the target, it returns the correct response based on the original ordering
+ */
+static CocoaWindowCompareFunctionResult CocoaRaiseWindowCompareFunction(id first, id second, void *ctx)
+{
+ CocoaWindowCompareContext *compareContext = (CocoaWindowCompareContext*)ctx;
+ // first should be ordered higher
+ if(first==compareContext->target())
+ return NSOrderedDescending;
+ // second should be ordered higher
+ if(second==compareContext->target())
+ return NSOrderedAscending;
+ return compareContext->CompareUsingOriginalOrdering(first,second);
+}
+
projects / wxWidgets.git / blobdiff