implement View.invalidate()

src/api-impl-jni/generated_headers/android_view_View.h

@@ -205,6 +205,14 @@ JNIEXPORT void JNICALL Java_android_view_View_native_1constructor
 JNIEXPORT void JNICALL Java_android_view_View_native_1set_1size_1request
   (JNIEnv *, jobject, jint, jint);
 
+/*
+ * Class:     android_view_View
+ * Method:    nativeInvalidate
+ * Signature: (J)V
+ */
+JNIEXPORT void JNICALL Java_android_view_View_nativeInvalidate
+  (JNIEnv *, jclass, jlong);
+
 /*
  * Class:     android_view_View
  * Method:    setVisibility

src/api-impl-jni/views/android_view_View.c

@@ -231,3 +231,9 @@ JNIEXPORT void JNICALL Java_android_view_View_native_1constructor(JNIEnv *env, j
 
 	_SET_LONG_FIELD(this, "widget", (long)area);
 }
+
+JNIEXPORT void JNICALL Java_android_view_View_nativeInvalidate(JNIEnv *env, jclass, jlong widget_ptr) {
+	GtkWidget *widget = GTK_WIDGET(_PTR(widget_ptr));
+
+	gtk_widget_queue_draw(gtk_widget_get_parent(widget));
+}

src/api-impl/android/view/View.java

@@ -802,7 +802,10 @@ public class View extends Object {
 
 	public void invalidate(Rect dirty) {}
 	public void invalidate(int l, int t, int r, int b) {}
-	public void invalidate() {}
+	public void invalidate() {
+		nativeInvalidate(widget);
+	}
+	private static native void nativeInvalidate(long widget);
 
 	public void setBackgroundColor(int color) {}
 	public native void setVisibility(int visibility);