79 lines
1.6 KiB
Go
79 lines
1.6 KiB
Go
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// Copyright 2017 Zack Guo <zack.y.guo@gmail.com>. All rights reserved.
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// Use of this source code is governed by a MIT license that can
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// be found in the LICENSE file.
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package termui
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import "image"
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// Align is the position of the gauge's label.
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type Align uint
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// All supported positions.
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const (
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AlignNone Align = 0
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AlignLeft Align = 1 << iota
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AlignRight
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AlignBottom
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AlignTop
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AlignCenterVertical
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AlignCenterHorizontal
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AlignCenter = AlignCenterVertical | AlignCenterHorizontal
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)
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func AlignArea(parent, child image.Rectangle, a Align) image.Rectangle {
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w, h := child.Dx(), child.Dy()
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// parent center
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pcx, pcy := parent.Min.X+parent.Dx()/2, parent.Min.Y+parent.Dy()/2
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// child center
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ccx, ccy := child.Min.X+child.Dx()/2, child.Min.Y+child.Dy()/2
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if a&AlignLeft == AlignLeft {
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child.Min.X = parent.Min.X
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child.Max.X = child.Min.X + w
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}
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if a&AlignRight == AlignRight {
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child.Max.X = parent.Max.X
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child.Min.X = child.Max.X - w
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}
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if a&AlignBottom == AlignBottom {
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child.Max.Y = parent.Max.Y
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child.Min.Y = child.Max.Y - h
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}
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if a&AlignTop == AlignRight {
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child.Min.Y = parent.Min.Y
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child.Max.Y = child.Min.Y + h
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}
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if a&AlignCenterHorizontal == AlignCenterHorizontal {
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child.Min.X += pcx - ccx
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child.Max.X = child.Min.X + w
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}
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if a&AlignCenterVertical == AlignCenterVertical {
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child.Min.Y += pcy - ccy
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child.Max.Y = child.Min.Y + h
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}
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return child
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}
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func MoveArea(a image.Rectangle, dx, dy int) image.Rectangle {
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a.Min.X += dx
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a.Max.X += dx
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a.Min.Y += dy
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a.Max.Y += dy
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return a
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}
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var termWidth int
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var termHeight int
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func TermRect() image.Rectangle {
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return image.Rect(0, 0, termWidth, termHeight)
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}
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