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// Copyright 2014 The gocui Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"log"
"github.com/jroimartin/gocui"
)
var (
viewArr = []string{"v1", "v2", "v3", "v4"}
active = 0
)
func setCurrentViewOnTop(g *gocui.Gui, name string) (*gocui.View, error) {
if _, err := g.SetCurrentView(name); err != nil {
return nil, err
}
return g.SetViewOnTop(name)
}
func nextView(g *gocui.Gui, v *gocui.View) error {
nextIndex := (active + 1) % len(viewArr)
name := viewArr[nextIndex]
out, err := g.View("v2")
if err != nil {
return err
}
fmt.Fprintln(out, "Going from view "+v.Name()+" to "+name)
if _, err := setCurrentViewOnTop(g, name); err != nil {
return err
}
if nextIndex == 0 || nextIndex == 3 {
g.Cursor = true
} else {
g.Cursor = false
}
active = nextIndex
return nil
}
func layout(g *gocui.Gui) error {
maxX, maxY := g.Size()
if v, err := g.SetView("v1", 0, 0, maxX/2-1, maxY/2-1); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Title = "v1 (editable)"
v.Editable = true
v.Wrap = true
if _, err = setCurrentViewOnTop(g, "v1"); err != nil {
return err
}
}
if v, err := g.SetView("v2", maxX/2-1, 0, maxX-1, maxY/2-1); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Title = "v2"
v.Wrap = true
v.Autoscroll = true
}
if v, err := g.SetView("v3", 0, maxY/2-1, maxX/2-1, maxY-1); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Title = "v3"
v.Wrap = true
v.Autoscroll = true
fmt.Fprint(v, "Press TAB to change current view")
}
if v, err := g.SetView("v4", maxX/2, maxY/2, maxX-1, maxY-1); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Title = "v4 (editable)"
v.Editable = true
}
return nil
}
func quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}
func main() {
g, err := gocui.NewGui(gocui.OutputNormal)
if err != nil {
log.Panicln(err)
}
defer g.Close()
g.Highlight = true
g.Cursor = true
g.SelFgColor = gocui.ColorGreen
g.SetManagerFunc(layout)
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
log.Panicln(err)
}
if err := g.SetKeybinding("", gocui.KeyTab, gocui.ModNone, nextView); err != nil {
log.Panicln(err)
}
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
log.Panicln(err)
}
}
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