From 4196dfb215557368ed8f98df2de9b55c70818353 Mon Sep 17 00:00:00 2001
From: tibbi <tibor@kaputa.sk>
Date: Tue, 23 Feb 2016 21:50:47 +0100
Subject: [PATCH] toggle fullscreen mode at viewpager on click

---
 .../com/ViewPagerFragment.java                | 10 ++++-
 .../com/activities/ViewPagerActivity.java     | 38 +++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/gallery/simplemobiletools/com/ViewPagerFragment.java b/app/src/main/java/gallery/simplemobiletools/com/ViewPagerFragment.java
index 0d04e3c57..dac9877c7 100644
--- a/app/src/main/java/gallery/simplemobiletools/com/ViewPagerFragment.java
+++ b/app/src/main/java/gallery/simplemobiletools/com/ViewPagerFragment.java
@@ -9,7 +9,9 @@ import android.view.ViewGroup;
 import com.davemorrissey.labs.subscaleview.ImageSource;
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView;
 
-public class ViewPagerFragment extends Fragment {
+import gallery.simplemobiletools.com.activities.ViewPagerActivity;
+
+public class ViewPagerFragment extends Fragment implements View.OnClickListener {
     private String path;
 
     public void setPath(String path) {
@@ -24,8 +26,14 @@ public class ViewPagerFragment extends Fragment {
             final SubsamplingScaleImageView imageView = (SubsamplingScaleImageView) view.findViewById(R.id.photo);
             imageView.setImage(ImageSource.uri(path));
             imageView.setMaxScale(5f);
+            imageView.setOnClickListener(this);
         }
 
         return view;
     }
+
+    @Override
+    public void onClick(View v) {
+        ((ViewPagerActivity) getActivity()).photoClicked();
+    }
 }
diff --git a/app/src/main/java/gallery/simplemobiletools/com/activities/ViewPagerActivity.java b/app/src/main/java/gallery/simplemobiletools/com/activities/ViewPagerActivity.java
index c38a9df44..f2dcd0b08 100644
--- a/app/src/main/java/gallery/simplemobiletools/com/activities/ViewPagerActivity.java
+++ b/app/src/main/java/gallery/simplemobiletools/com/activities/ViewPagerActivity.java
@@ -5,6 +5,7 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.provider.MediaStore;
 import android.support.v7.app.AppCompatActivity;
+import android.view.View;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -18,6 +19,7 @@ import gallery.simplemobiletools.com.adapters.MyPagerAdapter;
 
 public class ViewPagerActivity extends AppCompatActivity {
     private int pos;
+    private boolean isFullScreen;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -25,11 +27,23 @@ public class ViewPagerActivity extends AppCompatActivity {
         setContentView(R.layout.activity_photo);
 
         pos = 0;
+        isFullScreen = true;
+        hideSystemUI();
+
         final MyViewPager pager = (MyViewPager) findViewById(R.id.view_pager);
         final MyPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager());
         adapter.setPaths(getPhotos());
         pager.setAdapter(adapter);
         pager.setCurrentItem(pos);
+
+        getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
+            @Override
+            public void onSystemUiVisibilityChange(int visibility) {
+                if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
+                    isFullScreen = false;
+                }
+            }
+        });
     }
 
     private List<String> getPhotos() {
@@ -62,4 +76,28 @@ public class ViewPagerActivity extends AppCompatActivity {
         }
         return photos;
     }
+
+    public void photoClicked() {
+        isFullScreen = !isFullScreen;
+        if (isFullScreen) {
+            hideSystemUI();
+        } else {
+            showSystemUI();
+        }
+    }
+
+    private void hideSystemUI() {
+        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
+                        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
+                        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_FULLSCREEN |
+                        View.SYSTEM_UI_FLAG_IMMERSIVE);
+    }
+
+    private void showSystemUI() {
+        getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
+                        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
+                        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
+    }
 }