28 lines
1019 B
Go
28 lines
1019 B
Go
package tomo
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import "image"
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// LayoutEntry associates an element with layout and positioning information so
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// it can be arranged by a Layout.
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type LayoutEntry struct {
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Element
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Position image.Point
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Expand bool
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}
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// Layout is capable of arranging elements within a container. It is also able
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// to determine the minimum amount of room it needs to do so.
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type Layout interface {
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// Arrange takes in a slice of entries and a bounding width and height,
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// and changes the position of the entiries in the slice so that they
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// are properly laid out. The given width and height should not be less
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// than what is returned by MinimumSize.
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Arrange (entries []LayoutEntry, width, height int)
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// MinimumSize returns the minimum width and height that the layout
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// needs to properly arrange the given slice of layout entries, given a
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// "suqeeze" width so that the height can be determined for elements
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// fulfilling the Expanding interface.
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MinimumSize (entries []LayoutEntry, squeeze int) (width, height int)
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}
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