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package main
import (
"image"
"image/draw"
"time"
"github.com/faiface/gui"
"github.com/faiface/gui/layout"
"github.com/faiface/gui/win"
"github.com/faiface/mainthread"
)
var (
bg = gui.HexToColor("#999999") // background color
)
func main() {
mainthread.Run(run)
}
func run() {
w, err := win.New(win.Title("Grid Layout Test"), win.Resizable())
if err != nil {
panic(err)
}
mux, env := gui.NewMux(w)
// Background
back := layout.NewRegion(mux.MakeEnv(), layout.ResizeAll, layout.Background(bg))
// Create region on top of background, in bottom-right quadrant
region := layout.NewRegion(back, layout.ResizeQuad4)
go blinker(region)
for event := range env.Events() {
switch event.(type) {
case win.WiClose:
close(env.Draw())
return
}
}
}
// Blinker is a widget that blinks three times when it is clicked.
func blinker(env gui.Env) {
redraw := func(visible bool) func(draw.Image) image.Rectangle {
return func(img draw.Image) image.Rectangle {
if visible {
draw.Draw(img, img.Bounds(), image.White, image.ZP, draw.Src)
} else {
draw.Draw(img, img.Bounds(), image.Black, image.ZP, draw.Src)
}
return img.Bounds()
}
}
area := (<-env.Events()).(gui.Resize).Rectangle // first event guaranteed to be Resize
env.Draw() <- redraw(true)
for event := range env.Events() {
switch event := event.(type) {
case gui.Resize:
area = event.Rectangle
env.Draw() <- redraw(true)
case win.MoDown:
if event.Point.In(area) {
go func() {
for i := 0; i < 3; i++ {
env.Draw() <- redraw(false)
time.Sleep(time.Second / 6)
env.Draw() <- redraw(true)
time.Sleep(time.Second / 6)
}
}()
}
}
}
close(env.Draw())
}
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