Intro In previous articles we discussed how to create leaf Widget without children and Widget with a single child. Now it is time to create more complex Widget with multiple children. Today I will describe how to create a SimpleOverlay Widget. The only thing it does is placing one Widget and…

Into In previous article we have created a custom Widget to notify us when its child size changes. To accomplish this task SingleChildRenderObjectWidget helper was used. It simplifies some parts of the code because we don’t need to write our own Element. This time we will write everything from scratch. Writing…

Intro The time has come for my second article. This time it will be a pretty simple Widget that notifies us when its child size changes. The task is pretty simple but the main point of it is to show you how to manage children in RenderObject. When I just started…

Intro Declarative UI in Flutter is pretty nice, easy to use and it is very enticing to use it as much as possible. But very often developers just go overboard with it — writing everything in a declarative style even when sometimes task can be done much more efficiently and easier…