Exemplo n.º 1
0
        protected override void OnItemLayout(LayoutItemEventArgs args)
        {
            AnimatedWrapPanelItemState state;

             var accuState =
            args.AccumulateState as WrapPanelAccumulatedItemState
            ?? new WrapPanelAccumulatedItemState (args.LayoutItemState, AnimationDuration);

             if (Orientation == Orientation.Vertical)
             {
            if (accuState.NextY + args.DesiredSize.Height > args.AvailableSize.Height)
            {
               accuState.X = accuState.NextX;
               accuState.Y = 0;
               accuState.NextX = 0;
            }
            else
            {
               accuState.Y = accuState.NextY;
            }

            accuState.NextX = Math.Max (accuState.NextX, accuState.X + args.DesiredSize.Width);
            accuState.NextY = accuState.Y + args.DesiredSize.Height;
             }
             else
             {
            if (accuState.NextX + args.DesiredSize.Width > args.AvailableSize.Width)
            {
               accuState.X = 0;
               accuState.Y = accuState.NextY;
               accuState.NextY = 0;
            }
            else
            {
               accuState.X = accuState.NextX;
            }

            accuState.NextX = accuState.X + args.DesiredSize.Width;
            accuState.NextY = Math.Max (accuState.NextY, accuState.Y + args.DesiredSize.Height);
             }

             args.AccumulateState = accuState;

             var newX = accuState.X;
             var newY = accuState.Y;

             switch (args.LayoutItemState)
             {
            case LayoutItemState.IsMeasuring:
               state =
                  new AnimatedWrapPanelItemState
                     {
                        TranslateTransform =
                           new TranslateTransform
                           {
                              X = newX,
                              Y = newY,
                           },
                     };
               break;
            case LayoutItemState.IsArranging:
               state = args.State as AnimatedWrapPanelItemState;

               if (state == null)
               {
                  state =
                     new AnimatedWrapPanelItemState
                        {
                           TranslateTransform =
                              new TranslateTransform
                              {
                                 X = newX,
                                 Y = newY,
                              },
                        };

                  AnimateOpacity (args, accuState);
               }
               else if (
                     newX != state.TranslateTransform.X
                  || newY != state.TranslateTransform.Y
                  )
               {
                  AnimateOpacity (args, accuState);
               }

               if (newX != state.TranslateTransform.X)
               {
                  accuState.ShowStoryboard.AnimateProperty (
                     state.TranslateTransform,
                     TranslateTransform.XProperty,
                     TimeSpan.Zero,
                     newX
                     );
               }

               if (newY != state.TranslateTransform.Y)
               {
                  accuState.ShowStoryboard.AnimateProperty (
                     state.TranslateTransform,
                     TranslateTransform.YProperty,
                     TimeSpan.Zero,
                     newY
                     );
               }

               break;
            default:
               throw new ArgumentOutOfRangeException ();
             }
             args.State = state;
             args.Transform = state.TranslateTransform;
        }
Exemplo n.º 2
0
 protected abstract void OnItemLayout(LayoutItemEventArgs layoutItemEventArgs);
Exemplo n.º 3
0
        protected override Size ArrangeOverride(Size finalSize)
        {
            if (Children == null || Children.Count < 1)
             {
            return finalSize;
             }

             object accumulatedState = null;
             try
             {
            var count = Children.Count;
            for (var iter = 0; iter < Children.Count; ++iter)
            {
               var child = Children[iter];
               var desiredSize = child.DesiredSize;
               var args = new LayoutItemEventArgs
               {
                  LayoutItemState = LayoutItemState.IsArranging,
                  UiElement = child,
                  AccumulateState = accumulatedState,
                  State = GetUIElementState (child),
                  AvailableSize = finalSize,
                  DesiredSize = desiredSize,
                  Count = count,
                  Index = iter,
                  Transform = child.RenderTransform,
               };

               OnItemLayout (args);

               accumulatedState = args.AccumulateState;
               child.RenderTransform = args.Transform ?? s_identityTransform;
               SetUIElementState (child, args.State);
               child.Arrange (new Rect (0, 0, child.DesiredSize.Width, child.DesiredSize.Height));
            }

            return finalSize;
            }
             finally
             {
            Common.Dispose (accumulatedState);
             }
        }
Exemplo n.º 4
0
        protected override Size MeasureOverride(Size availableSize)
        {
            if (Children == null || Children.Count < 1)
             {
            return new Size (0, 0);
             }

             var resultingRect = new Rect ();

             object accumulatedState = null;
             try
             {
            var count = Children.Count;
            for (var iter = 0; iter < count; ++iter)
            {
               var child = Children[iter];
               child.Measure (availableSize);
               var desiredSize = child.DesiredSize;
               var args = new LayoutItemEventArgs
               {
                  LayoutItemState = LayoutItemState.IsMeasuring,
                  UiElement = child,
                  AccumulateState = accumulatedState,
                  State = GetUIElementState (child),
                  AvailableSize = availableSize,
                  DesiredSize = desiredSize,
                  Count = count,
                  Index = iter,
                  Transform = child.RenderTransform,
               };

               OnItemLayout (args);

               accumulatedState = args.AccumulateState;
               var childRect = (args.Transform ?? s_identityTransform).TransformBounds (new Rect (0, 0, desiredSize.Width, desiredSize.Height));
               resultingRect.Union (childRect);
            }

            return availableSize.Merge (resultingRect.ToSize ());
             }
             finally
             {
            Common.Dispose (accumulatedState);
             }
        }
Exemplo n.º 5
0
        void AnimateOpacity(LayoutItemEventArgs args, WrapPanelAccumulatedItemState accuState)
        {
            args.UiElement.Opacity = 0;

             accuState.ShowStoryboard.AnimateProperty (
            args.UiElement,
            OpacityProperty,
            AnimationDuration,
            1.0,
            0.0
            );
        }