macOS: Transition to new QPA dag-and-drop API

The new API allows us to pass the mouse buttons and
keyboard modifiers along with the QWSI event.

Task-number: QTBUG-57168
Change-Id: Ic54c012d1593d922e7dcd31facab2f2c630c7996
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 71 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index a1cf1bc632..12be222ab3 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -278,6 +278,77 @@ Qt::MouseButton cocoaButton2QtButton(NSInteger buttonNum)
     return Qt::NoButton;
 }
 
+/*!
+  \fn Qt::MouseButton cocoaButton2QtButton(NSEvent *event)
+
+  Returns the Qt::Button that corresponds to an NSEvent.buttonNumber.
+
+  \note AppKit will use buttonNumber 0 to indicate both "left button"
+  and "no button". Only NSEvents that describes mouse press/release/dragging
+  events (e.g NSEventTypeOtherMouseDown) will contain a valid
+  button number.
+*/
+Qt::MouseButton cocoaButton2QtButton(NSEvent *event)
+{
+    if (event.type == NSMouseMoved)
+        return Qt::NoButton;
+
+    return cocoaButton2QtButton(event.buttonNumber);
+}
+
+/*!
+  \fn QEvent::Type cocoaEvent2QtMouseEvent(NSEvent *event)
+
+  Returns the QEvent::Type that corresponds to an NSEvent.type.
+*/
+QEvent::Type cocoaEvent2QtMouseEvent(NSEvent *event)
+{
+    switch (event.type) {
+    case NSLeftMouseDown:
+    case NSRightMouseDown:
+    case NSOtherMouseDown:
+        return QEvent::MouseButtonPress;
+
+    case NSLeftMouseUp:
+    case NSRightMouseUp:
+    case NSOtherMouseUp:
+        return QEvent::MouseButtonRelease;
+
+    case NSLeftMouseDragged:
+    case NSRightMouseDragged:
+    case NSOtherMouseDragged:
+        return QEvent::MouseMove;
+
+    case NSMouseMoved:
+        return QEvent::MouseMove;
+
+    default:
+        break;
+    }
+
+    return QEvent::None;
+}
+
+/*!
+  \fn Qt::MouseButtons cocoaMouseButtons2QtMouseButtons(NSInteger pressedMouseButtons)
+
+  Returns the Qt::MouseButtons that corresponds to an NSEvent.pressedMouseButtons.
+*/
+Qt::MouseButtons cocoaMouseButtons2QtMouseButtons(NSInteger pressedMouseButtons)
+{
+  return static_cast<Qt::MouseButton>(pressedMouseButtons & Qt::MouseButtonMask);
+}
+
+/*!
+  \fn Qt::MouseButtons currentlyPressedMouseButtons()
+
+  Returns the Qt::MouseButtons that corresponds to an NSEvent.pressedMouseButtons.
+*/
+Qt::MouseButtons currentlyPressedMouseButtons()
+{
+  return cocoaMouseButtons2QtMouseButtons(NSEvent.pressedMouseButtons);
+}
+
 QString qt_mac_removeAmpersandEscapes(QString s)
 {
     return QPlatformTheme::removeMnemonics(s).trimmed();