Getting Started
Last updated
Last updated
A layout and view system that draws stuff on canvas, has no external dependencies besides TypeScript typings (for now :wink: ). The idea is similar to what we can do with RelativeLayout (or ConstraintLayout) and Views on Android. Base classes are:
It's like component in React. It has it's own lifecycle and is able to accept properties. To access properties from React wrapper, properties need to have Java-style setters and getters (i.e. for property myProperty, you have setMyProperty() and getMyProperty()). Usually we want to see the change after setting a value, this is why view needs to call require() method inside property setters.
The lifecycle looks like this:
This is what lets us position the view inside another view. One can set the LayoutParams' values by chaining available methods. The dimensions of View can be set as a number (in pixels), MATCH_PARENT or WRAP_CONTENT. The calculated size is then wrapped to minWidth/maxWidth and minHeight/maxHeight.
MATCH_PARENT - the view is as big as it's parent
WRAP_CONTENT - view takes the smallest amount of space possible
Views can be positioned absolutely or relatively. Absolute positioning is the simplest one: just set the desired x and y coordinates and view will appear there. Relative positioning is a bit more complex concept, illustrated below.
This section is unfortunately still work in progress...
