Method DoDragDrop

Source/Engine/Platform/SDL/SDLPlatform.Mac.cpp:393–446

}

@end

DragDropEffect SDLWindow::DoDragDrop(const StringView& data)
{
    NSWindow* window = (NSWindow*)_handle;
    ClipboardDataProviderImpl* clipboardDataProvider = [ClipboardDataProviderImpl alloc];
    clipboardDataProvider->Window = this;

    // Create mouse drag event
    NSEvent* event = [NSEvent
        mouseEventWithType:NSEventTypeLeftMouseDragged
        location:window.mouseLocationOutsideOfEventStream
        modifierFlags:0
        timestamp:NSApp.currentEvent.timestamp
        windowNumber:window.windowNumber
        context:nil
        eventNumber:0
        clickCount:1
        pressure:1.0];

    // Create drag item
    NSPasteboardItem* pasteItem = [NSPasteboardItem new];
    [pasteItem setDataProvider:clipboardDataProvider forTypes:[NSArray arrayWithObjects:NSPasteboardTypeString, nil]];
    NSDraggingItem* dragItem = [[NSDraggingItem alloc] initWithPasteboardWriter:pasteItem];
    [dragItem setDraggingFrame:NSMakeRect(event.locationInWindow.x, event.locationInWindow.y, 100, 100) contents:nil];

    // Start dragging session
    NSDraggingSession* draggingSession = [window.contentView beginDraggingSessionWithItems:[NSArray arrayWithObject:dragItem] event:event source:clipboardDataProvider];
    DragDropEffect result = DragDropEffect::None;

#if USE_EDITOR
    //ASSERT(!MacImpl::MacDragSession);
    // TODO: Dragging item from dropdown box in a floating window attempts to init dragging twice
    if (MacImpl::MacDragSession != nullptr)
        return result;

    MacImpl::MacDragSession = draggingSession;
    MacImpl::MacDragExitFlag = 0;
    MacImpl::DraggingData = data;
    MacImpl::DraggingActive = true;
    while (Platform::AtomicRead(&MacImpl::MacDragExitFlag) == 0)
    {
        // The internal event loop will block here during the drag operation,
        // events are processed in the event filter callback instead.
        SDLPlatform::Tick();
        Platform::Sleep(1);
    }
    MacImpl::DraggingActive = false;
    MacImpl::DraggingData.Clear();
    MacImpl::MacDragSession = nullptr;
#endif

    return result;
}

DragDropEffect SDLWindow::DoDragDrop(const StringView& data, const Float2& offset, Window* dragSourceWindow)
{