26 lines
1 KiB
Go
26 lines
1 KiB
Go
package points
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import (
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"image"
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"gioui.org/layout"
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)
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// ContextCenter returns a point representing the center of the provide layout context.
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func ContextCenter(gtx layout.Context) image.Point {
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return image.Pt(gtx.Constraints.Max.X/2, gtx.Constraints.Max.Y/2)
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}
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// ContextCenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the context center.
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func ContextCenterSquare(gtx layout.Context, apothem int) (min image.Point, max image.Point) {
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min = image.Pt(gtx.Constraints.Max.X/2-apothem, gtx.Constraints.Max.Y/2-apothem)
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max = image.Pt(gtx.Constraints.Max.X/2+apothem, gtx.Constraints.Max.Y/2+apothem)
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return
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}
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// CenterSquare returns two points representing the upper left corner (min) and lower right corner (max) of a square around the given center point.
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func CenterSquare(center image.Point, apothem int) (min image.Point, max image.Point) {
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min = image.Pt(center.X-apothem, center.Y-apothem)
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max = image.Pt(center.X+apothem, center.Y+apothem)
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return
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}
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