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a case for gocui which does not work setCurrentView on key press
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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" | |
"io" | |
"io/ioutil" | |
"log" | |
"strings" | |
"github.com/jroimartin/gocui" | |
) | |
func nextView(g *gocui.Gui, v *gocui.View) error { | |
if v == nil || v.Name() == "side" { | |
_, err := g.SetCurrentView("main") | |
return err | |
} | |
_, err := g.SetCurrentView("side") | |
return err | |
} | |
func cursorDown(g *gocui.Gui, v *gocui.View) error { | |
if v != nil { | |
cx, cy := v.Cursor() | |
if err := v.SetCursor(cx, cy+1); err != nil { | |
ox, oy := v.Origin() | |
if err := v.SetOrigin(ox, oy+1); err != nil { | |
return err | |
} | |
} | |
} | |
return nil | |
} | |
func cursorUp(g *gocui.Gui, v *gocui.View) error { | |
if v != nil { | |
ox, oy := v.Origin() | |
cx, cy := v.Cursor() | |
if err := v.SetCursor(cx, cy-1); err != nil && oy > 0 { | |
if err := v.SetOrigin(ox, oy-1); err != nil { | |
return err | |
} | |
} | |
} | |
return nil | |
} | |
func getLine(g *gocui.Gui, v *gocui.View) error { | |
var l string | |
var err error | |
_, cy := v.Cursor() | |
if l, err = v.Line(cy); err != nil { | |
l = "" | |
} | |
maxX, maxY := g.Size() | |
if v, err := g.SetView("msg", maxX/2-30, maxY/2, maxX/2+30, maxY/2+2); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
fmt.Fprintln(v, l) | |
if _, err := g.SetCurrentView("msg"); err != nil { | |
return err | |
} | |
} | |
return nil | |
} | |
func delMsg(g *gocui.Gui, v *gocui.View) error { | |
if err := g.DeleteView("msg"); err != nil { | |
return err | |
} | |
if _, err := g.SetCurrentView("side"); err != nil { | |
return err | |
} | |
return nil | |
} | |
func quit(g *gocui.Gui, v *gocui.View) error { | |
return gocui.ErrQuit | |
} | |
func keybindings(g *gocui.Gui) error { | |
if err := g.SetKeybinding("side", gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyArrowDown, gocui.ModNone, cursorDown); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyArrowUp, gocui.ModNone, cursorUp); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyEnter, gocui.ModNone, getLine); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("msg", gocui.KeyEnter, gocui.ModNone, delMsg); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlS, gocui.ModNone, saveMain); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlW, gocui.ModNone, saveVisualMain); err != nil { | |
return err | |
} | |
return nil | |
} | |
func saveMain(g *gocui.Gui, v *gocui.View) error { | |
f, err := ioutil.TempFile("", "gocui_demo_") | |
if err != nil { | |
return err | |
} | |
defer f.Close() | |
p := make([]byte, 5) | |
v.Rewind() | |
for { | |
n, err := v.Read(p) | |
if n > 0 { | |
if _, err := f.Write(p[:n]); err != nil { | |
return err | |
} | |
} | |
if err == io.EOF { | |
break | |
} | |
if err != nil { | |
return err | |
} | |
} | |
return nil | |
} | |
func saveVisualMain(g *gocui.Gui, v *gocui.View) error { | |
f, err := ioutil.TempFile("", "gocui_demo_") | |
if err != nil { | |
return err | |
} | |
defer f.Close() | |
vb := v.ViewBuffer() | |
if _, err := io.Copy(f, strings.NewReader(vb)); err != nil { | |
return err | |
} | |
return nil | |
} | |
func layout(g *gocui.Gui) error { | |
maxX, maxY := g.Size() | |
if v, err := g.SetView("side", -1, -1, 30, maxY); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
v.Highlight = true | |
v.SelBgColor = gocui.ColorGreen | |
v.SelFgColor = gocui.ColorBlack | |
fmt.Fprintln(v, "Item 1") | |
fmt.Fprintln(v, "Item 2") | |
fmt.Fprintln(v, "Item 3") | |
fmt.Fprint(v, "\rWill be") | |
fmt.Fprint(v, "deleted\rItem 4\nItem 5") | |
} | |
if v, err := g.SetView("main", 30, -1, maxX, maxY); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
b, err := ioutil.ReadFile("Mark.Twain-Tom.Sawyer.txt") | |
if err != nil { | |
panic(err) | |
} | |
fmt.Fprintf(v, "%s", b) | |
v.Editable = true | |
v.Wrap = true | |
if _, err := g.SetCurrentView("main"); err != nil { | |
return err | |
} | |
} | |
return nil | |
} | |
func main() { | |
g, err := gocui.NewGui(gocui.OutputNormal) | |
if err != nil { | |
log.Panicln(err) | |
} | |
defer g.Close() | |
g.Cursor = true | |
g.SetManagerFunc(layout) | |
if err := keybindings(g); err != nil { | |
log.Panicln(err) | |
} | |
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit { | |
log.Panicln(err) | |
} | |
} |
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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" | |
"io" | |
"io/ioutil" | |
"log" | |
"strings" | |
"github.com/jroimartin/gocui" | |
) | |
func nextView(g *gocui.Gui, v *gocui.View) error { | |
if v == nil || v.Name() == "side" { | |
_, err := g.SetCurrentView("main") | |
return err | |
} | |
_, err := g.SetCurrentView("side") | |
return err | |
} | |
func cursorDown(g *gocui.Gui, v *gocui.View) error { | |
if v != nil { | |
cx, cy := v.Cursor() | |
if err := v.SetCursor(cx, cy+1); err != nil { | |
ox, oy := v.Origin() | |
if err := v.SetOrigin(ox, oy+1); err != nil { | |
return err | |
} | |
} | |
} | |
return nil | |
} | |
func cursorUp(g *gocui.Gui, v *gocui.View) error { | |
if v != nil { | |
ox, oy := v.Origin() | |
cx, cy := v.Cursor() | |
if err := v.SetCursor(cx, cy-1); err != nil && oy > 0 { | |
if err := v.SetOrigin(ox, oy-1); err != nil { | |
return err | |
} | |
} | |
} | |
return nil | |
} | |
func getLine(g *gocui.Gui, v *gocui.View) error { | |
var l string | |
var err error | |
_, cy := v.Cursor() | |
if l, err = v.Line(cy); err != nil { | |
l = "" | |
} | |
maxX, maxY := g.Size() | |
if v, err := g.SetView("msg", maxX/2-30, maxY/2, maxX/2+30, maxY/2+2); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
fmt.Fprintln(v, l) | |
if _, err := g.SetCurrentView("msg"); err != nil { | |
return err | |
} | |
} | |
return nil | |
} | |
func delMsg(g *gocui.Gui, v *gocui.View) error { | |
if err := g.DeleteView("msg"); err != nil { | |
return err | |
} | |
if _, err := g.SetCurrentView("side"); err != nil { | |
return err | |
} | |
return nil | |
} | |
func quit(g *gocui.Gui, v *gocui.View) error { | |
return gocui.ErrQuit | |
} | |
func keybindings(g *gocui.Gui) error { | |
if err := g.SetKeybinding("side", gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyArrowDown, gocui.ModNone, cursorDown); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyArrowUp, gocui.ModNone, cursorUp); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("side", gocui.KeyEnter, gocui.ModNone, getLine); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("msg", gocui.KeyEnter, gocui.ModNone, delMsg); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlS, gocui.ModNone, saveMain); err != nil { | |
return err | |
} | |
if err := g.SetKeybinding("main", gocui.KeyCtrlW, gocui.ModNone, saveVisualMain); err != nil { | |
return err | |
} | |
return nil | |
} | |
func saveMain(g *gocui.Gui, v *gocui.View) error { | |
f, err := ioutil.TempFile("", "gocui_demo_") | |
if err != nil { | |
return err | |
} | |
defer f.Close() | |
p := make([]byte, 5) | |
v.Rewind() | |
for { | |
n, err := v.Read(p) | |
if n > 0 { | |
if _, err := f.Write(p[:n]); err != nil { | |
return err | |
} | |
} | |
if err == io.EOF { | |
break | |
} | |
if err != nil { | |
return err | |
} | |
} | |
return nil | |
} | |
func saveVisualMain(g *gocui.Gui, v *gocui.View) error { | |
f, err := ioutil.TempFile("", "gocui_demo_") | |
if err != nil { | |
return err | |
} | |
defer f.Close() | |
vb := v.ViewBuffer() | |
if _, err := io.Copy(f, strings.NewReader(vb)); err != nil { | |
return err | |
} | |
return nil | |
} | |
func layout(g *gocui.Gui) error { | |
maxX, maxY := g.Size() | |
if v, err := g.SetView("side", -1, -1, 30, maxY); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
v.Highlight = true | |
v.SelBgColor = gocui.ColorGreen | |
v.SelFgColor = gocui.ColorBlack | |
fmt.Fprintln(v, "Item 1") | |
fmt.Fprintln(v, "Item 2") | |
fmt.Fprintln(v, "Item 3") | |
fmt.Fprint(v, "\rWill be") | |
fmt.Fprint(v, "deleted\rItem 4\nItem 5") | |
} | |
if v, err := g.SetView("main", 30, -1, maxX, maxY); err != nil { | |
if err != gocui.ErrUnknownView { | |
return err | |
} | |
b, err := ioutil.ReadFile("Mark.Twain-Tom.Sawyer.txt") | |
if err != nil { | |
panic(err) | |
} | |
fmt.Fprintf(v, "%s", b) | |
v.Editable = true | |
v.Wrap = true | |
} | |
// This line is changed | |
if _, err := g.SetCurrentView("main"); err != nil { | |
return err | |
} | |
return nil | |
} | |
func main() { | |
g, err := gocui.NewGui(gocui.OutputNormal) | |
if err != nil { | |
log.Panicln(err) | |
} | |
defer g.Close() | |
g.Cursor = true | |
g.SetManagerFunc(layout) | |
if err := keybindings(g); err != nil { | |
log.Panicln(err) | |
} | |
if err := g.MainLoop(); err != nil && err != gocui.ErrQuit { | |
log.Panicln(err) | |
} | |
} |
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If we put the following block in
layout function
outside of the setView block, it will not workdifference :
happypath:
sadpath