add

examples/loadimage/loadimage.go

@@ -1,23 +1,28 @@
 package main
 
 import (
+	"context"
 	"fmt"
 	"image"
 	_ "image/jpeg"
 	_ "image/png"
 	"log"
+	"net/http"
+	"time"
 
 	g "github.com/AllenDang/giu"
 )
 
 var (
-	fallback = &g.ReflectiveBoundTexture{}
-	gopher   = &g.ReflectiveBoundTexture{}
-	rgba     *image.RGBA
+	fallback      = &g.ReflectiveBoundTexture{}
+	gopher        = &g.ReflectiveBoundTexture{}
+	urlWidgetLike = &g.ReflectiveBoundTexture{}
+	rgba          *image.RGBA
 )
 
 func loop() {
 
+	urlWidgetLike.SetSurfaceFn(downloadUrlFn("https://static.wikia.nocookie.net/smashbros/images/0/0e/Art_Sonic_TSR.png/revision/latest?cb=20200210122913&path-prefix=fr", time.Second*10), true)
 	g.SingleWindow().Layout(
 		g.Label("Display image from texture"),
 		gopher.ToImageWidget(),
@@ -30,14 +35,16 @@ func loop() {
 			fmt.Println("image from file was clicked")
 		}).Size(860, 561),
 
+		// TODO Rewrite via func (i *ReflectiveBoundTexture) SetSurfaceFn(fn func() *image.RGBA, commit bool) error {
+		g.Label("Display image from url (wait few seconds to download)"),
+		g.ImageWithURL("https://png.pngitem.com/pimgs/s/3-36108_gopher-golang-hd-png-download.png").OnClick(func() {
+			fmt.Println("image from url clicked")
+		}).Size(300, 200),
 		/*
-			g.Label("Display image from url (wait few seconds to download)"),
-			g.ImageWithURL("https://png.pngitem.com/pimgs/s/3-36108_gopher-golang-hd-png-download.png").OnClick(func() {
-				fmt.Println("image from url clicked")
-
-				}).Size(300, 200),
-
 			g.Label("Display images from url with loading and fallback"),
+			g.Label("Display image from url without placeholder (no size when loading)"),
+			urlWidgetLike.ToImageWidget().Size(300, 200),
+
 			g.ImageWithURL(
 				"https://png.pngitem.com/pimgs/s/424-4241958_transparent-gopher-png-golang-gopher-png-png-download.png").
 				Timeout(5*time.Second).
@@ -48,7 +55,7 @@ func loop() {
 					}),
 				).
 				LayoutForFailure(
-					fallback.Image().Size(300, 200),
+					fallback.ToImageWidget().Size(300, 200),
 				).
 				OnReady(func() {
 					fmt.Println("Image is downloaded.")
@@ -57,11 +64,8 @@ func loop() {
 			g.Label("Handle failure event"),
 			g.ImageWithURL("http://x.y/z.jpg").Timeout(2*time.Second).OnFailure(func(err error) {
 				fmt.Printf("Failed to download image, Error msg is %s\n", err.Error())
-			}),
+			}),*/
 
-			g.Label("Display image from url without placeholder (no size when loading)"),
-			g.ImageWithURL("https://www.pngitem.com/pimgs/m/424-4242405_go-lang-gopher-clipart-png-download-golang-gopher.png").Size(300, 200),
-		*/
 		g.Label("Footer"),
 	)
 }
@@ -79,3 +83,32 @@ func main() {
 	//wnd.SetIcon(rgba)
 	wnd.Run(loop)
 }
+
+func downloadUrlFn(imgUrl string, timeout time.Duration) func() *image.RGBA {
+	return func() *image.RGBA {
+		client := &http.Client{Timeout: timeout}
+		req, err := http.NewRequestWithContext(context.Background(), "GET", imgUrl, http.NoBody)
+		if err != nil {
+			//errorFn(err)
+			return nil
+		}
+		resp, err := client.Do(req)
+		if err != nil {
+			//errorFn(err)
+			return nil
+		}
+		defer resp.Body.Close()
+		/*defer func() {
+			if closeErr := resp.Body.Close(); closeErr != nil {
+				errorFn(closeErr)
+			}
+		}()*/
+		img, _, err := image.Decode(resp.Body)
+		if err != nil {
+			//errorFn(err)
+			return nil
+		}
+		return g.ImageToRgba(img)
+
+	}
+}