diff --git a/layout.go b/layout.go new file mode 100644 index 0000000..e4fda38 --- /dev/null +++ b/layout.go @@ -0,0 +1,40 @@ +package ui + +// Recursively removes border margins and padding from controls, replaces +// nil values with stretchy spaces and reorients nested stack to have +// opposing orientations. +func resetControls(parent *Stack) { + for i, control := range parent.controls { + switch control.(type) { + case *Stack: + stack := control.(*Stack) + stack.borderMargin = 0 + stack.orientation = !parent.orientation + resetControls(stack) + case nil: + emptySpace := newStack(horizontal) + parent.controls[i] = emptySpace + parent.stretchy[i] = true + } + } +} + +// Creates a new Stack from the given controls. The topmost Stack will have +// vertical orientation and margin borders, with each nested stack being +// oriented oppositely. Controls are displayed with a default padding +// between them. +func Layout(controls ...Control) *Stack { + stack := &Stack{ + orientation: vertical, + controls: controls, + stretchy: make([]bool, len(controls)), + width: make([]int, len(controls)), + height: make([]int, len(controls)), + padding: 10, + borderMargin: 15, + } + + resetControls(stack) + + return stack +}