コード例 #1
0
            public bool HandleMotionEvent(IViewParent parent, MotionEvent motionEvent)
            {
                if (_isInViewCell || _element.InputTransparent || motionEvent.Action == MotionEventActions.Cancel)
                {
                    return(false);
                }

                var renderer = parent as VisualElementRenderer <Xamarin.Forms.View>;

                if (renderer == null)
                {
                    return(false);
                }

                var type = parent.GetType();

                if (type.Name.Contains("DefaultRenderer"))
                {
                    try
                    {
                        // Let the container know that we're "fake" handling this event
                        var method = type.GetTypeInfo().GetDeclaredMethod("NotifyFakeHandling");
                        if (method != null)
                        {
                            method.Invoke(parent, null);
                            return(true);
                        }
                    }
                    catch (Exception) { }
                }

                return(true);
            }
コード例 #2
0
            public bool HandleMotionEvent(IViewParent parent, MotionEvent motionEvent)
            {
                if (_isInViewCell || _element.InputTransparent || motionEvent.Action == MotionEventActions.Cancel)
                {
                    return(false);
                }

                var rendererType = parent.GetType();

                if (!_platformDefaultRendererType.IsAssignableFrom(rendererType))
                {
                    return(false);
                }

                try
                {
                    // Let the container know that we're "fake" handling this event
                    if (_platformDefaultRendererTypeNotifyFakeHandling != null)
                    {
                        _platformDefaultRendererTypeNotifyFakeHandling.Invoke(parent, null);
                        return(true);
                    }
                }
                catch { }

                return(false);
            }
コード例 #3
0
        public bool RequestFocus(global::Android.Views.View control, Func <bool> baseRequestFocus)
        {
            IViewParent ancestor             = control.Parent;
            var         previousFocusability = DescendantFocusability.BlockDescendants;


            LinearLayout cfl = null;

            // Work our way up through the tree until we find a ConditionalFocusLayout
            while (ancestor is ViewGroup)
            {
                cfl = ancestor as LinearLayout;

                var found = ancestor.GetType().Name == "ConditionalFocusLayout";

                if (cfl != null && found)
                {
                    previousFocusability = cfl.DescendantFocusability;
                    // Toggle DescendantFocusability to allow this control to get focus
                    cfl.DescendantFocusability = DescendantFocusability.AfterDescendants;
                    break;
                }

                ancestor = ancestor.Parent;
            }

            // Call the original RequestFocus implementation for the View
            bool result = baseRequestFocus();

            if (cfl != null)
            {
                // Toggle descendantfocusability back to whatever it was
                cfl.DescendantFocusability = previousFocusability;
            }

            return(result);
        }