diff options
Diffstat (limited to 'src/plugins/platforms/cocoa/qcocoahelpers.mm')
| -rw-r--r-- | src/plugins/platforms/cocoa/qcocoahelpers.mm | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm index 1dee11678e..c57567bdd6 100644 --- a/src/plugins/platforms/cocoa/qcocoahelpers.mm +++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm @@ -40,7 +40,7 @@ #include <qpa/qplatformtheme.h> #include "qcocoahelpers.h" - +#include "qnsview.h" #include <QtCore> #include <QtGui> @@ -143,7 +143,30 @@ Qt::DropActions qt_mac_mapNSDragOperations(NSDragOperation nsActions) return actions; } +/*! + Returns the view cast to a QNSview if possible. + + If the view is not a QNSView, nil is returned, which is safe to + send messages to, effectivly making [qnsview_cast(view) message] + a no-op. + For extra verbosity and clearer code, please consider checking + that window()->type() != Qt::ForeignWindow before using this cast. + + Do not use this method soley to check for foreign windows, as + that will make the code harder to read for people not working + primarily on macOS, who do not know the difference between the + NSView and QNSView cases. +*/ +QNSView *qnsview_cast(NSView *view) +{ + if (![view isKindOfClass:[QNSView class]]) { + qCWarning(lcQpaCocoaWindow) << "NSView is not QNSView, consider checking for Qt::ForeignWindow"; + return nil; + } + + return static_cast<QNSView *>(view); +} // // Misc |