7aed750f64
Merge https://github.com/Matt3o12/termui.git colored-list Merge https://github.com/funkygao/termui.git master Add subdir widget Use image Rectangle represent buffer area
131 lines
2.8 KiB
Go
131 lines
2.8 KiB
Go
// Copyright 2015 Zack Guo <gizak@icloud.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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// Block is a base struct for all other upper level widgets,
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// consider it as css: display:block.
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// Normally you do not need to create it manually.
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type Block struct {
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Area image.Rectangle
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innerArea image.Rectangle
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X int
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Y int
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Border LabeledBorder
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IsDisplay bool
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HasBorder bool
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Bg Attribute
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Width int
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Height int
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PaddingTop int
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PaddingBottom int
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PaddingLeft int
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PaddingRight int
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}
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// NewBlock returns a *Block which inherits styles from current theme.
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func NewBlock() *Block {
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d := Block{}
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d.IsDisplay = true
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d.HasBorder = theme.HasBorder
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d.Border.Left = true
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d.Border.Right = true
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d.Border.Top = true
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d.Border.Bottom = true
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d.Border.Bg = theme.BorderBg
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d.Border.Fg = theme.BorderFg
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d.Border.LabelBgClr = theme.BorderLabelTextBg
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d.Border.LabelFgClr = theme.BorderLabelTextFg
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d.Bg = theme.BlockBg
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d.Width = 2
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d.Height = 2
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return &d
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}
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// Align computes box model
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func (d *Block) Align() {
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d.Area.Min.X = d.X
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d.Area.Min.Y = d.Y
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d.Area.Max.X = d.X + d.Width - 1
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d.Area.Max.Y = d.Y + d.Height - 1
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d.innerArea.Min.X = d.X + d.PaddingLeft
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d.innerArea.Min.Y = d.Y + d.PaddingTop
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d.innerArea.Max.X = d.Area.Max.X - d.PaddingRight
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d.innerArea.Max.Y = d.Area.Max.Y - d.PaddingBottom
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d.Border.Area = d.Area
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if d.HasBorder {
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switch {
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case d.Border.Left:
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d.innerArea.Min.X++
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fallthrough
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case d.Border.Right:
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d.innerArea.Max.X--
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fallthrough
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case d.Border.Top:
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d.innerArea.Min.Y++
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fallthrough
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case d.Border.Bottom:
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d.innerArea.Max.Y--
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}
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}
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}
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// InnerBounds returns the internal bounds of the block after aligning and
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// calculating the padding and border, if any.
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func (d *Block) InnerBounds() image.Rectangle {
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d.Align()
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return d.innerArea
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}
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// Buffer implements Bufferer interface.
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// Draw background and border (if any).
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func (d *Block) Buffer() Buffer {
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d.Align()
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buf := NewBuffer()
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buf.Area = d.Area
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if !d.IsDisplay {
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return buf
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}
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// render border
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if d.HasBorder {
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buf.Union(d.Border.Buffer())
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}
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// render background
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for p := range buf.CellMap {
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if p.In(d.innerArea) {
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buf.CellMap[p] = Cell{' ', ColorDefault, d.Bg}
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}
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}
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return buf
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}
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// GetHeight implements GridBufferer.
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// It returns current height of the block.
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func (d Block) GetHeight() int {
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return d.Height
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}
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// SetX implements GridBufferer interface, which sets block's x position.
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func (d *Block) SetX(x int) {
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d.X = x
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}
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// SetY implements GridBufferer interface, it sets y position for block.
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func (d *Block) SetY(y int) {
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d.Y = y
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}
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// SetWidth implements GridBuffer interface, it sets block's width.
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func (d *Block) SetWidth(w int) {
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d.Width = w
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}
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