protected override MeasuredLayout calculateMeasuredLayout(Bounds perantBounds)
{
MeasuredLayout calculatedRootItem = base.calculateMeasuredLayout(perantBounds);
calculatedRootItem.type = "CustomPlacementLayout";
calculatedRootItem.drawable = this;
calculatedRootItem.reactiveView = this;
Bounds resultBounds = calculatedRootItem.getBounds().clone();
double largestX = 0;
double largestY = 0;
foreach (ILayoutItem layoutItem in childLayoutItems)
{
MeasuredLayout nextChild = layoutItem.getMeasuredLayout(resultBounds);
nextChild.reactiveView = (ReactiveView)layoutItem;
double width = nextChild.getBounds().rect.Width;
double height = nextChild.getBounds().rect.Height;
if (width > largestX)
{
largestX = width;
}
if (height > largestY)
{
largestY = height;
}
calculatedRootItem.addCalculatedChild(nextChild);
}
if (sizeParams.Width == WRAP_CONTENTS)
{
calculatedRootItem.getBounds().rect.Width = largestX;
foreach (MeasuredLayout layoutItem in calculatedRootItem.getCalculatedChildren())
{
layoutItem.getBounds().rect.Location = new Point(layoutItem.getBounds().rect.Location.X + largestX / 2, layoutItem.getBounds().rect.Location.Y);
}
}
if (sizeParams.Width == WRAP_CONTENTS)
{
calculatedRootItem.getBounds().rect.Height = largestY;
foreach (MeasuredLayout layoutItem in calculatedRootItem.getCalculatedChildren())
{
layoutItem.getBounds().rect.Location = new Point(layoutItem.getBounds().rect.Location.X, layoutItem.getBounds().rect.Location.Y + largestY / 2);
}
}
return(calculatedRootItem);
}
private void drawTree(MeasuredLayout item, DrawCanvas canvas)
{
foreach (MeasuredLayout child in item.getCalculatedChildren())
{
DrawCanvas canvasClone = canvas.Clone();
canvasClone.setTopLeft(item.getBounds().rect.Left, item.getBounds().rect.Top);
child.drawable.draw(canvasClone, child.getBounds().rect);
drawTree(child, canvasClone);
}
}
private bool handleItem(MeasuredLayout item, MouseEvent motionEvent)
{
if (isPointInBounds(motionEvent.coordinates, item.getBounds().rect))// Give a chance to handle and alter the motion event before passing on to children
{
if (item.reactiveView != null && item.reactiveView != latchedView)
{
currentMouseOverViews.Add(item.reactiveView);
if (item.reactiveView.handleMouseEvent != null)
{
MouseHandleResult motionResult = item.reactiveView.handleMouseEvent(motionEvent);
if (motionResult.shouldLatch == true)
{
latchedView = item.reactiveView;
}
if (motionResult.shouldLatch == false)
{
if (latchedView == item.reactiveView)
{
latchedView = null;
}
}
if (motionResult.handled == HandledStatus.HANDLED)
{
return(true);
}
}
}
}
else
{
return(false);
}
MouseEvent motionEventClone = motionEvent.clone();
motionEventClone.coordinates.X -= item.getBounds().rect.Left;
motionEventClone.coordinates.Y -= item.getBounds().rect.Top;
foreach (MeasuredLayout childItem in item.getCalculatedChildren())
{
bool thisHandledIt = handleItem(childItem, motionEventClone);
if (thisHandledIt == true)
{
return(true);
}
}
return(false);
}
private void inverseBounds(MeasuredLayout item, bool xAxis, bool yAxis)
{
foreach (MeasuredLayout childItem in item.getCalculatedChildren())
{
if (xAxis)
{
childItem.getBounds().rect.Offset(item.getBounds().rect.Width - childItem.getBounds().rect.Right - childItem.getBounds().rect.Left, 0);
}
if (yAxis)
{
childItem.getBounds().rect.Offset(0, item.getBounds().rect.Height - childItem.getBounds().rect.Top - childItem.getBounds().rect.Bottom);
}
}
}
private bool handleLatchedLayout(MeasuredLayout item, MouseEvent motionEvent)
{
if (item.reactiveView == latchedView)
{
MouseHandleResult res = item.reactiveView.handleMouseEvent(motionEvent);
return(res.handled == HandledStatus.HANDLED);
}
MouseEvent motionEventClone = motionEvent.clone();
motionEventClone.coordinates.X -= item.getBounds().rect.Left;
motionEventClone.coordinates.Y -= item.getBounds().rect.Top;
bool childHandledIt = false;
foreach (MeasuredLayout childItem in item.getCalculatedChildren())
{
if (handleLatchedLayout(childItem, motionEventClone))
{
childHandledIt = true;
}
}
return(childHandledIt);
}
