Added parallax feature to simple slide

Author: janheinrichmerker

library/src/main/java/com/heinrichreimersoftware/materialintro/slide/FragmentSlide.java

@@ -3,9 +3,7 @@
 import android.content.Context;
 import android.os.Bundle;
 import android.support.annotation.ColorRes;
-import android.support.annotation.FloatRange;
 import android.support.annotation.LayoutRes;
-import android.support.annotation.Nullable;
 import android.support.annotation.StyleRes;
 import android.support.v4.app.Fragment;
 import android.support.v7.view.ContextThemeWrapper;
@@ -14,10 +12,7 @@
 import android.view.ViewGroup;
 
 import com.heinrichreimersoftware.materialintro.app.SlideFragment;
-import com.heinrichreimersoftware.materialintro.view.parallax.Parallaxable;
-
-import java.util.LinkedList;
-import java.util.Queue;
+import com.heinrichreimersoftware.materialintro.view.parallax.ParallaxFragment;
 
 public class FragmentSlide implements Slide, RestorableSlide {
 
@@ -128,15 +123,12 @@ public FragmentSlide build(){
         }
     }
 
-    public static class FragmentSlideFragment extends Fragment implements Parallaxable {
+    public static class FragmentSlideFragment extends ParallaxFragment {
         private static final String ARGUMENT_LAYOUT_RES =
                 "com.heinrichreimersoftware.materialintro.SimpleFragment.ARGUMENT_LAYOUT_RES";
         private static final String ARGUMENT_THEME_RES =
                 "com.heinrichreimersoftware.materialintro.SimpleFragment.ARGUMENT_THEME_RES";
 
-        @Nullable
-        private Parallaxable parallaxLayout;
-
         public FragmentSlideFragment() {
         }
 
@@ -167,32 +159,7 @@ public View onCreateView(LayoutInflater inflater, ViewGroup container,
             }
             LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);
 
-            View root = localInflater.inflate(getArguments().getInt(ARGUMENT_LAYOUT_RES), container, false);
-            parallaxLayout = findParallaxLayout(root);
-            return root;
-        }
-
-        public Parallaxable findParallaxLayout(View root) {
-            Queue<View> queue = new LinkedList<>();
-            queue.add(root);
-            while (!queue.isEmpty()) {
-                View child = queue.remove();
-                if (child instanceof Parallaxable) {
-                    return (Parallaxable) child;
-                } else if (child instanceof ViewGroup) {
-                    ViewGroup viewGroup = (ViewGroup) child;
-                    for (int i = viewGroup.getChildCount() - 1; i >= 0; i--) {
-                        queue.add(viewGroup.getChildAt(i));
-                    }
-                }
-            }
-            return null;
-        }
-
-        @Override
-        public void setOffset(@FloatRange(from = -1.0, to = 1.0) float offset) {
-            if (parallaxLayout != null)
-                parallaxLayout.setOffset(offset);
+            return localInflater.inflate(getArguments().getInt(ARGUMENT_LAYOUT_RES), container, false);
         }
     }
 }

library/src/main/java/com/heinrichreimersoftware/materialintro/slide/SimpleSlide.java

@@ -23,7 +23,7 @@
 import android.widget.TextView;
 
 import com.heinrichreimersoftware.materialintro.R;
-import com.heinrichreimersoftware.materialintro.app.SlideFragment;
+import com.heinrichreimersoftware.materialintro.view.parallax.ParallaxSlideFragment;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -314,7 +314,7 @@ public SimpleSlide build() {
         }
     }
 
-    public static class SimpleSlideFragment extends SlideFragment {
+    public static class SimpleSlideFragment extends ParallaxSlideFragment {
         private static final String ARGUMENT_TITLE =
                 "com.heinrichreimersoftware.materialintro.SimpleFragment.ARGUMENT_TITLE";
         private static final String ARGUMENT_TITLE_RES =

library/src/main/java/com/heinrichreimersoftware/materialintro/view/parallax/ParallaxFragment.java

@@ -0,0 +1,45 @@
+package com.heinrichreimersoftware.materialintro.view.parallax;
+
+import android.os.Bundle;
+import android.support.annotation.FloatRange;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.view.View;
+import android.view.ViewGroup;
+
+import java.util.LinkedList;
+import java.util.Queue;
+
+public class ParallaxFragment extends Fragment implements Parallaxable {
+    @Nullable
+    private Parallaxable parallaxLayout;
+
+    @Override
+    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+        parallaxLayout = findParallaxLayout(view);
+    }
+
+    public Parallaxable findParallaxLayout(View root) {
+        Queue<View> queue = new LinkedList<>();
+        queue.add(root);
+        while (!queue.isEmpty()) {
+            View child = queue.remove();
+            if (child instanceof Parallaxable) {
+                return (Parallaxable) child;
+            }
+            else if (child instanceof ViewGroup) {
+                ViewGroup viewGroup = (ViewGroup) child;
+                for (int i = viewGroup.getChildCount() - 1; i >= 0; i--) {
+                    queue.add(viewGroup.getChildAt(i));
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public void setOffset(@FloatRange(from = -1.0, to = 1.0) float offset) {
+        if (parallaxLayout != null)
+            parallaxLayout.setOffset(offset);
+    }
+}

library/src/main/java/com/heinrichreimersoftware/materialintro/view/parallax/ParallaxSlideFragment.java

@@ -0,0 +1,46 @@
+package com.heinrichreimersoftware.materialintro.view.parallax;
+
+import android.os.Bundle;
+import android.support.annotation.FloatRange;
+import android.support.annotation.Nullable;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.heinrichreimersoftware.materialintro.app.SlideFragment;
+
+import java.util.LinkedList;
+import java.util.Queue;
+
+public class ParallaxSlideFragment extends SlideFragment implements Parallaxable {
+    @Nullable
+    private Parallaxable parallaxLayout;
+
+    @Override
+    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+        parallaxLayout = findParallaxLayout(view);
+    }
+
+    public Parallaxable findParallaxLayout(View root) {
+        Queue<View> queue = new LinkedList<>();
+        queue.add(root);
+        while (!queue.isEmpty()) {
+            View child = queue.remove();
+            if (child instanceof Parallaxable) {
+                return (Parallaxable) child;
+            }
+            else if (child instanceof ViewGroup) {
+                ViewGroup viewGroup = (ViewGroup) child;
+                for (int i = viewGroup.getChildCount() - 1; i >= 0; i--) {
+                    queue.add(viewGroup.getChildAt(i));
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public void setOffset(@FloatRange(from = -1.0, to = 1.0) float offset) {
+        if (parallaxLayout != null)
+            parallaxLayout.setOffset(offset);
+    }
+}