Merge pull request #193 from Dorofeev/placeholder-for-image

added placeholder for Image.network

Author: Alex009

widgets/src/androidMain/kotlin/dev/icerock/moko/widgets/core/Image.kt

@@ -19,8 +19,8 @@ actual abstract class Image {
             return ResourceImage(imageResource)
         }
 
-        actual fun network(url: String): Image {
-            return NetworkImage(url)
+        actual fun network(url: String, placeholder: ImageResource?): Image {
+            return NetworkImage(url, placeholder)
         }
 
         actual fun bitmap(bitmap: Bitmap): Image {
@@ -35,11 +35,18 @@ private class ResourceImage(val imageResource: ImageResource) : Image() {
     }
 }
 
-private class NetworkImage(val url: String) : Image() {
+private class NetworkImage(val url: String, val placeholder: ImageResource?) : Image() {
     override fun loadIn(imageView: ImageView) {
+
         Glide.with(imageView)
             .load(Uri.parse(url))
+            .apply {
+                if(placeholder != null) {
+                    placeholder(placeholder.drawableResId)
+                }
+            }
             .into(imageView)
+
     }
 }
 

widgets/src/commonMain/kotlin/dev/icerock/moko/widgets/core/Image.kt

@@ -11,7 +11,7 @@ expect abstract class Image {
 
     companion object {
         fun resource(imageResource: ImageResource): Image
-        fun network(url: String): Image
+        fun network(url: String, placeholder: ImageResource? = null): Image
         fun bitmap(bitmap: Bitmap): Image
     }
 }

widgets/src/iosMain/kotlin/dev/icerock/moko/widgets/core/Image.kt

@@ -22,8 +22,8 @@ actual abstract class Image {
             return ResourceImage(imageResource)
         }
 
-        actual fun network(url: String): Image {
-            return NetworkImage(url)
+        actual fun network(url: String, placeholder: ImageResource?): Image {
+            return NetworkImage(url, placeholder)
         }
 
         actual fun bitmap(bitmap: Bitmap): Image {
@@ -51,10 +51,11 @@ class BitmapImage(
 
 // TODO add https://github.com/SDWebImage/SDWebImage to cache images
 class NetworkImage(
-    private val url: String
+    private val url: String,
+    private val placeholder: ImageResource?
 ) : Image() {
     override fun apply(view: UIView, block: (UIImage?) -> Unit) {
-        block(null)
+        block(placeholder?.toUIImage())
 
         try {
             val tag = url.hashCode().toLong()