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package main
import (
"fmt"
"gopkg.in/qml.v1"
"image/png"
"os"
)
const webview = `
import QtQuick 2.0
import QtWebKit 3.0
WebView {
width: 1024
height: 768
}
`
func main() {
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, "usage: %s <url> <png path>\n", os.Args[0])
os.Exit(1)
}
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.LoadString("webview.qml", webview)
if err != nil {
return err
}
ctrl := &Control{
done: make(chan error),
win: component.CreateWindow(nil),
}
engine.Context().SetVar("ctrl", ctrl)
root := ctrl.win.Root()
root.On("loadingChanged", ctrl.Snapshot)
root.Set("url", os.Args[1])
ctrl.win.Show()
return <-ctrl.done
}
type Control struct {
win *qml.Window
done chan error
}
func (ctrl *Control) Snapshot(request qml.Object) {
if request.Int("status") != 2 {
return
}
f, err := os.Create(os.Args[2])
if err != nil {
ctrl.done <- err
return
}
defer f.Close()
img := ctrl.win.Snapshot()
err = png.Encode(f, img)
if err != nil {
os.Remove(os.Args[2])
}
ctrl.done <- err
}
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