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package main
import (
"image"
"image/draw"
"github.com/faiface/gui"
)
type envPair struct {
events <-chan gui.Event
draw chan<- func(draw.Image) image.Rectangle
}
func (ep *envPair) Events() <-chan gui.Event { return ep.events }
func (ep *envPair) Draw() chan<- func(draw.Image) image.Rectangle { return ep.draw }
func FixedLeft(env gui.Env, x1 int) gui.Env {
out, in := gui.MakeEventsChan()
go func() {
for e := range env.Events() {
var x0, y0, dummy, y1 int
switch {
case e.Matches("resize/%d/%d/%d/%d", &x0, &y0, &dummy, &y1):
in <- gui.Eventf("resize/%d/%d/%d/%d", x0, y0, x1, y1)
default:
in <- e
}
}
close(in)
}()
return &envPair{out, env.Draw()}
}
func FixedRight(env gui.Env, x0 int) gui.Env {
out, in := gui.MakeEventsChan()
go func() {
for e := range env.Events() {
var dummy, y0, x1, y1 int
switch {
case e.Matches("resize/%d/%d/%d/%d", &dummy, &y0, &x1, &y1):
in <- gui.Eventf("resize/%d/%d/%d/%d", x0, y0, x1, y1)
default:
in <- e
}
}
close(in)
}()
return &envPair{out, env.Draw()}
}
func FixedTop(env gui.Env, y1 int) gui.Env {
out, in := gui.MakeEventsChan()
go func() {
for e := range env.Events() {
var x0, y0, x1, dummy int
switch {
case e.Matches("resize/%d/%d/%d/%d", &x0, &y0, &x1, &dummy):
in <- gui.Eventf("resize/%d/%d/%d/%d", x0, y0, x1, y1)
default:
in <- e
}
}
close(in)
}()
return &envPair{out, env.Draw()}
}
func FixedBottom(env gui.Env, y0 int) gui.Env {
out, in := gui.MakeEventsChan()
go func() {
for e := range env.Events() {
var x0, dummy, x1, y1 int
switch {
case e.Matches("resize/%d/%d/%d/%d", &x0, &dummy, &x1, &y1):
in <- gui.Eventf("resize/%d/%d/%d/%d", x0, y0, x1, y1)
default:
in <- e
}
}
close(in)
}()
return &envPair{out, env.Draw()}
}
func EvenHorizontal(env gui.Env, minI, maxI, n int) gui.Env {
out, in := gui.MakeEventsChan()
go func() {
for e := range env.Events() {
var x0, y0, x1, y1 int
switch {
case e.Matches("resize/%d/%d/%d/%d", &x0, &y0, &x1, &y1):
x0, x1 := x0+(x1-x0)*minI/n, x0+(x1-x0)*maxI/n
in <- gui.Eventf("resize/%d/%d/%d/%d", x0, y0, x1, y1)
default:
in <- e
}
}
close(in)
}()
return &envPair{out, env.Draw()}
}
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