Add Tabpane
This commit is contained in:
marigs
parent
9d0302382d
commit
5a0bce64fa
79
example/tabs.go
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79
example/tabs.go
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@ -0,0 +1,79 @@
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package main
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import (
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"github.com/gizak/termui"
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//"fmt"
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//"os"
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)
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func main() {
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err := termui.Init()
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if err != nil {
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panic(err)
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}
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defer termui.Close()
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termui.UseTheme("helloworld")
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header := termui.NewPar("Press q to quit, Press j or k to switch tabs")
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header.Height = 1
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header.Width = 50
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header.HasBorder = false
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header.TextBgColor = termui.ColorBlue
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tab1 := termui.NewTab("pierwszy")
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par2 := termui.NewPar("Press q to quit\nPress j or k to switch tabs\n")
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par2.Height = 5
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par2.Width = 37
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par2.Y = 0
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par2.Border.Label = "Keys"
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par2.Border.FgColor = termui.ColorYellow
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tab1.AddBlocks(par2)
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tab2 := termui.NewTab("drugi")
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bc := termui.NewBarChart()
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data := []int{3, 2, 5, 3, 9, 5, 3, 2, 5, 8, 3, 2, 4, 5, 3, 2, 5, 7, 5, 3, 2, 6, 7, 4, 6, 3, 6, 7, 8, 3, 6, 4, 5, 3, 2, 4, 6, 4, 8, 5, 9, 4, 3, 6, 5, 3, 6}
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bclabels := []string{"S0", "S1", "S2", "S3", "S4", "S5"}
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bc.Border.Label = "Bar Chart"
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bc.Data = data
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bc.Width = 26
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bc.Height = 10
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bc.DataLabels = bclabels
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bc.TextColor = termui.ColorGreen
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bc.BarColor = termui.ColorRed
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bc.NumColor = termui.ColorYellow
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tab2.AddBlocks(bc)
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tab3 := termui.NewTab("trzeci")
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tab4 := termui.NewTab("żółw")
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tab5 := termui.NewTab("four")
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tab6 := termui.NewTab("five")
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tabpane := termui.NewTabpane()
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tabpane.Y = 1
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tabpane.Width = 30
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tabpane.HasBorder = true
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tabpane.SetTabs(*tab1, *tab2, *tab3, *tab4, *tab5, *tab6)
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termui.Render(header, tabpane)
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evt := termui.EventCh()
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for {
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select {
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case e := <- evt:
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if e.Type == termui.EventKey {
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switch e.Ch {
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case 'q':
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return
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case 'j':
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tabpane.SetActiveLeft()
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termui.Render(header, tabpane)
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case 'k':
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tabpane.SetActiveRight()
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termui.Render(header, tabpane)
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}
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}
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}
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}
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}
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235
tabpane.go
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235
tabpane.go
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@ -0,0 +1,235 @@
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package termui
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import (
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"unicode/utf8"
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)
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type Tab struct {
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Label string
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RuneLen int
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Blocks []Bufferer
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}
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func NewTab(label string) *Tab {
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return &Tab {
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Label: label,
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RuneLen: utf8.RuneCount([]byte(label)) }
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}
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func (tab *Tab) AddBlocks(rs ...Bufferer) {
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for _, r := range rs {
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tab.Blocks = append(tab.Blocks, r)
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}
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}
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func (tab *Tab) Buffer() []Point {
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points := []Point{}
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for blockNum := 0; blockNum < len(tab.Blocks); blockNum++ {
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b := &tab.Blocks[blockNum]
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blockPoints := (*b).Buffer()
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points = append(points, blockPoints...)
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}
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return points
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}
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type Tabpane struct {
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Block
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Tabs []Tab
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activeTabIndex int
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posTabText []int
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offTabText int
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}
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func NewTabpane() *Tabpane {
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tp := Tabpane {
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Block: *NewBlock(),
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activeTabIndex: 0,
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offTabText: 0}
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return &tp
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}
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func (tp *Tabpane) SetTabs(tabs ...Tab) {
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tp.Tabs = make([]Tab, len(tabs))
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tp.posTabText = make([]int, len(tabs)+1)
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off := 0
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for i :=0; i < len(tp.Tabs); i++ {
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tp.Tabs[i] = tabs[i]
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tp.posTabText[i] = off
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off += tp.Tabs[i].RuneLen+1 //+1 for space between tabs
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}
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tp.posTabText[len(tabs)] = off-1 //total length of Tab's text
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}
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func (tp *Tabpane) SetActiveLeft() {
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if tp.activeTabIndex == 0 {
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return
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}
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tp.activeTabIndex -= 1
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if tp.posTabText[tp.activeTabIndex] < tp.offTabText {
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tp.offTabText = tp.posTabText[tp.activeTabIndex]
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}
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}
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func (tp *Tabpane) SetActiveRight() {
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if tp.activeTabIndex == len(tp.Tabs)-1 {
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return
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}
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tp.activeTabIndex += 1
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endOffset := tp.posTabText[tp.activeTabIndex] + tp.Tabs[tp.activeTabIndex].RuneLen
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if endOffset + tp.offTabText > tp.innerWidth {
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tp.offTabText = endOffset - tp.innerWidth
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}
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}
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// Checks if left and right tabs are fully visible
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// if only left tabs are not visible return -1
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// if only right tabs are not visible return 1
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// if both return 0
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// use only if fitsWidth() returns false
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func (tp *Tabpane) checkAlignment() int {
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ret := 0
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if tp.offTabText > 0 {
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ret = -1
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}
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if tp.offTabText + tp.innerWidth < tp.posTabText[len(tp.Tabs)] {
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ret += 1
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}
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return ret
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}
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// Checks if all tabs fits innerWidth of Tabpane
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func (tp *Tabpane) fitsWidth() bool {
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return tp.innerWidth >= tp.posTabText[len(tp.Tabs)]
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}
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func (tp *Tabpane) align() {
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if !tp.fitsWidth() && !tp.HasBorder {
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tp.innerWidth -= 2
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tp.innerX += 1
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}
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}
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// Adds the point only if it is visible in Tabpane.
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// Point can be invisible if concatenation of Tab's texts is widther then
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// innerWidth of Tabpane
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func (tp *Tabpane) addPoint(ptab []Point, charOffset *int, oftX *int, points ...Point) []Point {
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if *charOffset < tp.offTabText || tp.offTabText + tp.innerWidth < *charOffset {
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*charOffset++
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return ptab
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}
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for _, p := range(points) {
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p.X = *oftX
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ptab = append(ptab, p)
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}
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*oftX++
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*charOffset++
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return ptab
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}
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// Draws the point and redraws upper and lower border points (if it has one)
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func (tp *Tabpane) drawPointWithBorder(p Point, ch rune, chbord rune, chdown rune, chup rune) []Point {
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var addp []Point
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p.Ch = ch
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if tp.HasBorder {
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p.Ch = chdown
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p.Y = tp.innerY-1
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addp = append(addp, p)
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p.Ch = chup
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p.Y = tp.innerY+1
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addp = append(addp, p)
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p.Ch = chbord
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}
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p.Y = tp.innerY
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return append(addp, p)
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}
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func (tp *Tabpane) Buffer() []Point {
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if tp.HasBorder {
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tp.Height = 3
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} else {
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tp.Height = 1
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}
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if tp.Width > tp.posTabText[len(tp.Tabs)]+2 {
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tp.Width = tp.posTabText[len(tp.Tabs)]+2
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}
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ps := tp.Block.Buffer()
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tp.align()
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if tp.innerHeight <= 0 || tp.innerWidth <= 0 {
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return nil
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}
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oftX := tp.innerX
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charOffset := 0
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pt := Point{Bg: tp.Border.BgColor, Fg: tp.Border.FgColor}
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for i, tab := range tp.Tabs {
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if i != 0 {
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pt.X = oftX
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pt.Y = tp.innerY
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addp := tp.drawPointWithBorder(pt, ' ', VERTICAL_LINE, HORIZONTAL_DOWN, HORIZONTAL_UP)
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ps = tp.addPoint(ps, &charOffset, &oftX, addp...)
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}
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if i == tp.activeTabIndex {
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pt.Bg = theme.TabActiveBg
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}
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rs := str2runes(tab.Label)
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for k := 0; k < len(rs); k++ {
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addp := make([]Point, 0, 2)
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if i == tp.activeTabIndex && tp.HasBorder {
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pt.Ch = ' '
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pt.Y = tp.innerY + 1
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pt.Bg = tp.Border.BgColor
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addp = append(addp, pt)
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pt.Bg = theme.TabActiveBg
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}
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pt.Y = tp.innerY
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pt.Ch = rs[k]
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addp = append(addp, pt)
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ps = tp.addPoint(ps, &charOffset, &oftX, addp...)
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}
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pt.Bg = tp.Border.BgColor
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if !tp.fitsWidth() {
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all := tp.checkAlignment()
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pt.X = tp.innerX-1
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pt.Ch = '*'
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if tp.HasBorder {
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pt.Ch = VERTICAL_LINE
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}
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ps = append(ps, pt)
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if all <= 0 {
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addp := tp.drawPointWithBorder(pt, '<', '«', HORIZONTAL_LINE, HORIZONTAL_LINE)
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ps = append(ps, addp...)
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}
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pt.X = tp.innerX + tp.innerWidth
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pt.Ch = '*'
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if tp.HasBorder {
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pt.Ch = VERTICAL_LINE
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}
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ps = append(ps, pt)
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if all >= 0 {
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addp := tp.drawPointWithBorder(pt, '>', '»', HORIZONTAL_LINE, HORIZONTAL_LINE)
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ps = append(ps, addp...)
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}
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}
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//draw tab content below the Tabpane
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if i == tp.activeTabIndex {
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blockPoints := tab.Buffer()
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for i := 0; i < len(blockPoints); i++ {
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blockPoints[i].Y += tp.Height + tp.Y
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}
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ps = append(ps, blockPoints...)
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}
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}
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return ps
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}
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