private LayoutViewResult LayoutView(PointF layoutOrigin, ref LayoutParams layoutParams)
{
var freeSpaceSize = new SizeF(Math.Max(0, _layoutSpaceBounds.Right - layoutOrigin.X),
Math.Max(0, _layoutSpaceBounds.Bottom - layoutOrigin.Y));
//Free space available a view in layout coordinates
var freeSpace = new RectangleF(layoutOrigin, freeSpaceSize);
//Free space available for a view in view coordinates
var viewFreeSpace = _layoutToView.Transform(freeSpace);
//Area which view wants to occupy in view coordinates
var viewBox = _layoutBuilder.View(layoutParams.View, viewFreeSpace);
_views.Add(viewBox);
layoutParams.Layout(viewBox);
//Area which view wants to occupy in layout coordinates
var layoutFrame = _viewToLayout.Transform(viewBox.Frame());
//Space required for view starting from layout origin in layout coordinates
var viewFrame = new RectangleF(layoutOrigin, new SizeF(layoutFrame.Right - layoutOrigin.X, layoutFrame.Bottom - layoutOrigin.Y));
var newLayoutOrigin = new PointF(viewFrame.Right + LayoutStep, viewFrame.Top);
return(new LayoutViewResult()
{
ViewLayoutBox = viewBox,
NewLayoutOrigin = newLayoutOrigin,
LayoutViewFrame = viewFrame
});
}
private LayoutViewResult LayoutView(PointF layoutOrigin, ref LayoutParams layoutParams)
{
var freeSpaceSize = new SizeF(_layoutBounds.Right - layoutOrigin.X, _layoutBounds.Bottom - layoutOrigin.Y);
//Free space available a view in layout coordinates
var freeSpace = new RectangleF(layoutOrigin, freeSpaceSize);
//Free space available for a view in view coordinates
var viewFreeSpace = _layoutToView.Transform(freeSpace);
//Postion which view wants to occupy in view coordinates
var viewBox = layoutParams.LayoutView(viewFreeSpace);
//Postion which view wants to occupy in layout coordinates
var layoutFrame = _viewToLayout.Transform(viewBox.LayoutBounds);
//Space required for view starting from layout origin in layout coordinates
var viewFrame = new RectangleF(layoutOrigin, new SizeF(layoutFrame.Right - layoutOrigin.X, layoutFrame.Bottom - layoutOrigin.Y));
var newLayoutOrigin = new PointF(viewFrame.Right, viewFrame.Top);
return(new LayoutViewResult()
{
ViewLayoutBox = viewBox,
NewLayoutOrigin = newLayoutOrigin,
LayoutViewFrame = viewFrame
});
}
public IViewLayoutBox Add(LayoutParams layoutParams)
{
Assert.State(_layoutBuilder).NotNull("Layout is not started. Did you call StartLayout?");
var layoutResult = LayoutView(_layoutOrigin, ref layoutParams);
var newLayoutOrigin = layoutResult.NewLayoutOrigin;
if (Flow && newLayoutOrigin.X - LayoutStep > _layoutSpaceBounds.Right)
{
var nextLine = new PointF(_layoutSpaceBounds.X, _layoutOrigin.Y + _maxSize + FlowStep);
layoutResult = LayoutView(nextLine, ref layoutParams);
newLayoutOrigin = layoutResult.NewLayoutOrigin;
if (newLayoutOrigin.X > _layoutSpaceBounds.Right)
{
newLayoutOrigin.X = _layoutSpaceBounds.X;
newLayoutOrigin.Y = _layoutOrigin.Y + layoutResult.LayoutViewFrame.Height + FlowStep;
}
}
_layoutBounds = RectangleF.Union(_layoutBounds, layoutResult.ViewLayoutBox.Frame());
_maxSize = Math.Max(_maxSize, layoutResult.LayoutViewFrame.Height);
_layoutOrigin = newLayoutOrigin;
return(layoutResult.ViewLayoutBox);
}
public LinearLayoutBuilder Add(LayoutParams layoutParams)
{
Assert.State(_views).NotNull("Layout is not started. Did you call StartLayout?");
var layoutResult = LayoutView(_layoutOrigin, ref layoutParams);
var newLayoutOrigin = layoutResult.NewLayoutOrigin;
if (Flow && newLayoutOrigin.X > _layoutBounds.Right)
{
var nextLine = new PointF(_layoutBounds.X, _layoutOrigin.Y + _maxSize);
layoutResult = LayoutView(nextLine, ref layoutParams);
newLayoutOrigin = layoutResult.NewLayoutOrigin;
if (newLayoutOrigin.X > _layoutBounds.Right)
{
newLayoutOrigin.X = _layoutBounds.X;
newLayoutOrigin.Y = _layoutOrigin.Y + layoutResult.LayoutViewFrame.Height;
}
}
_maxSize = Math.Max(_maxSize, layoutResult.LayoutViewFrame.Height);
_layoutOrigin = newLayoutOrigin;
_views.Add(layoutResult.ViewLayoutBox);
return(this);
}
protected virtual void CreateView()
{
Builder = new ViewHierarchyBuilder(Context);
hierarchy = new ViewHierarchy(this, Builder);
LayoutParameters = new LayoutParams(LayoutParams.WrapContent, LayoutParams.WrapContent);
}