package ui import ( "github.com/gdamore/tcell" ) type Tabs struct { Tabs []*Tab TabStrip *TabStrip TabContent *TabContent Selected int onInvalidateStrip func(d Drawable) onInvalidateContent func(d Drawable) } type Tab struct { Content Drawable Name string invalid bool } type TabStrip Tabs type TabContent Tabs func NewTabs() *Tabs { tabs := &Tabs{} tabs.TabStrip = (*TabStrip)(tabs) tabs.TabContent = (*TabContent)(tabs) return tabs } func (tabs *Tabs) Add(content Drawable, name string) { tabs.Tabs = append(tabs.Tabs, &Tab{ Content: content, Name: name, }) tabs.TabStrip.Invalidate() content.OnInvalidate(tabs.invalidateChild) } func (tabs *Tabs) invalidateChild(d Drawable) { for i, tab := range tabs.Tabs { if tab.Content == d { if i == tabs.Selected { tabs.TabContent.Invalidate() } return } } } func (tabs *Tabs) Remove(content Drawable) { for i, tab := range tabs.Tabs { if tab.Content == content { tabs.Tabs = append(tabs.Tabs[:i], tabs.Tabs[i+1:]...) break } } tabs.TabStrip.Invalidate() } func (tabs *Tabs) Select(index int) { if tabs.Selected != index { tabs.Selected = index tabs.TabStrip.Invalidate() tabs.TabContent.Invalidate() } } // TODO: Color repository func (strip *TabStrip) Draw(ctx *Context) { x := 0 for i, tab := range strip.Tabs { style := tcell.StyleDefault. Background(tcell.ColorWhite). Foreground(tcell.ColorBlack) if strip.Selected == i { style = tcell.StyleDefault. Background(tcell.ColorDefault). Foreground(tcell.ColorDefault) } x += ctx.Printf(x, 0, style, " %s ", tab.Name) } style := tcell.StyleDefault. Background(tcell.ColorWhite). Foreground(tcell.ColorBlack) ctx.Fill(x, 0, ctx.Width()-x, 1, ' ', style) } func (strip *TabStrip) Invalidate() { if strip.onInvalidateStrip != nil { strip.onInvalidateStrip(strip) } } func (strip *TabStrip) OnInvalidate(onInvalidate func(d Drawable)) { strip.onInvalidateStrip = onInvalidate } func (content *TabContent) Draw(ctx *Context) { tab := content.Tabs[content.Selected] tab.Content.Draw(ctx) } func (content *TabContent) Invalidate() { if content.onInvalidateContent != nil { content.onInvalidateContent(content) } } func (content *TabContent) OnInvalidate(onInvalidate func(d Drawable)) { content.onInvalidateContent = onInvalidate }