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tomo-old/layout.go
2023-01-31 18:04:12 -05:00

31 lines
1.1 KiB
Go

package tomo
import "image"
// LayoutEntry associates an element with layout and positioning information so
// it can be arranged by a Layout.
type LayoutEntry struct {
Element
Bounds image.Rectangle
Expand bool
}
// Layout is capable of arranging elements within a container. It is also able
// to determine the minimum amount of room it needs to do so.
type Layout interface {
// Arrange takes in a slice of entries and a bounding width and height,
// and changes the position of the entiries in the slice so that they
// are properly laid out. The given width and height should not be less
// than what is returned by MinimumSize.
Arrange (entries []LayoutEntry, bounds image.Rectangle)
// MinimumSize returns the minimum width and height that the layout
// needs to properly arrange the given slice of layout entries.
MinimumSize (entries []LayoutEntry) (width, height int)
// FlexibleHeightFor Returns the minimum height the layout needs to lay
// out the specified elements at the given width, taking into account
// flexible elements.
FlexibleHeightFor (entries []LayoutEntry, squeeze int) (height int)
}