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package main
import (
"fmt"
"math/rand"
"os"
"time"
"gopkg.in/qml.v1"
)
func main() {
if err := qml.Run(run); err != nil {
fmt.Fprintf(os.Stderr, "error: %v\n", err)
os.Exit(1)
}
}
func run() error {
engine := qml.NewEngine()
component, err := engine.LoadFile("particle.qml")
if err != nil {
return err
}
ctrl := Control{Message: "Hello from Go!"}
context := engine.Context()
context.SetVar("ctrl", &ctrl)
window := component.CreateWindow(nil)
ctrl.Root = window.Root()
rand.Seed(time.Now().Unix())
window.Show()
window.Wait()
return nil
}
type Control struct {
Root qml.Object
Message string
}
func (ctrl *Control) TextReleased(text qml.Object) {
x := text.Int("x")
y := text.Int("y")
width := text.Int("width")
height := text.Int("height")
ctrl.Emit(x+15, y+height/2)
ctrl.Emit(x+width/2, 1.0*y+height/2)
ctrl.Emit(x+width-15, 1.0*y+height/2)
go func() {
time.Sleep(500 * time.Millisecond)
messages := []string{"Hello", "Hello", "Hacks"}
ctrl.Message = messages[rand.Intn(len(messages))] + " from Go!"
qml.Changed(ctrl, &ctrl.Message)
}()
}
func (ctrl *Control) Emit(x, y int) {
component := ctrl.Root.Object("emitterComponent")
for i := 0; i < 8; i++ {
emitter := component.Create(nil)
emitter.Set("x", x)
emitter.Set("y", y)
emitter.Set("targetX", rand.Intn(240)-120+x)
emitter.Set("targetY", rand.Intn(240)-120+y)
emitter.Set("life", rand.Intn(2400)+200)
emitter.Set("emitRate", rand.Intn(32)+32)
emitter.ObjectByName("xAnim").Call("start")
emitter.ObjectByName("yAnim").Call("start")
emitter.Set("enabled", true)
}
}
func (ctrl *Control) Done(emitter qml.Object) {
emitter.Destroy()
}
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