kiwix#1113 Add swipe gesture on the toolbar to switch tabs

yashk2000 · Jan 26, 2020 · fdb497a · fdb497a
1 parent 9724d40
commit fdb497a
Showing 1 changed file with 50 additions and 5 deletions.
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.java b/core/src/main/java/org/kiwix/kiwixmobile/core/main/CoreMainActivity.java
@@ -40,6 +40,9 @@
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
+import android.view.animation.AccelerateInterpolator;
+import android.view.animation.Animation;
+import android.view.animation.TranslateAnimation;
 import android.webkit.WebView;
 import android.widget.Button;
 import android.widget.FrameLayout;
@@ -235,21 +238,21 @@ public void onFinish() {
   private ItemTouchHelper.Callback tabCallback = new ItemTouchHelper.Callback() {
     @Override
     public int getMovementFlags(@NonNull RecyclerView recyclerView,
-      @NonNull RecyclerView.ViewHolder viewHolder) {
+                                @NonNull RecyclerView.ViewHolder viewHolder) {
       return makeMovementFlags(0, ItemTouchHelper.UP | ItemTouchHelper.DOWN);
     }
 
     @Override
     public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView,
-      @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState,
-      boolean isCurrentlyActive) {
+                            @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState,
+                            boolean isCurrentlyActive) {
       super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
       viewHolder.itemView.setAlpha(1 - Math.abs(dY) / viewHolder.itemView.getMeasuredHeight());
     }
 
     @Override
     public boolean onMove(@NonNull RecyclerView recyclerView,
-      @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
+                          @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
       return false;
     }
 
@@ -308,6 +311,22 @@ public void onCreate(Bundle savedInstanceState) {
       public void onSwipeBottom() {
         showTabSwitcher();
       }
+
+      @Override
+      public void onSwipeLeft() {
+        if (currentWebViewIndex < webViewList.size() - 1) {
+          View current = getCurrentWebView();
+          current.setAnimation(transitionLeft());
+        }
+      }
+
+      @Override
+      public void onSwipeRight() {
+        if (currentWebViewIndex > 0) {
+          View current = getCurrentWebView();
+          current.setAnimation(transitionRight());
+        }
+      }
     });
 
     tableDrawerRight =
@@ -350,6 +369,32 @@ public void onSwipeBottom() {
     new ItemTouchHelper(tabCallback).attachToRecyclerView(tabRecyclerView);
   }
 
+  public Animation transitionRight() {
+    Animation inFromRight = new TranslateAnimation(
+      Animation.RELATIVE_TO_PARENT, +1.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f
+    );
+    inFromRight.setDuration(240);
+    inFromRight.setInterpolator(new AccelerateInterpolator());
+    selectTab(currentWebViewIndex - 1);
+    return inFromRight;
+  }
+
+  public Animation transitionLeft() {
+    Animation inFromLeft = new TranslateAnimation(
+      Animation.RELATIVE_TO_PARENT, -1.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f,
+      Animation.RELATIVE_TO_PARENT, 0.0f
+    );
+    inFromLeft.setDuration(240);
+    inFromLeft.setInterpolator(new AccelerateInterpolator());
+    selectTab(currentWebViewIndex + 1);
+    return inFromLeft;
+  }
+
   //End of onCreate
   private void handleIntentExtras(Intent intent) {
 
@@ -1067,7 +1112,7 @@ private boolean isNotPreviouslyOpenZim(String canonicalPath) {
 
   @Override
   public void onRequestPermissionsResult(int requestCode,
-    @NonNull String[] permissions, @NonNull int[] grantResults) {
+                                         @NonNull String[] permissions, @NonNull int[] grantResults) {
     switch (requestCode) {
       case REQUEST_STORAGE_PERMISSION: {
         if (hasPermission(Manifest.permission.READ_EXTERNAL_STORAGE)) {