Add center view button.

app/src/main/java/com/codigoparallevar/minicards/CanvasView.java

@@ -469,8 +469,13 @@ class CanvasView extends View implements PartGrid {
     public void setDevMode(boolean devMode) {
         _devMode = devMode;
         if (!_devMode) {
-            this._viewOrigin = new Tuple2<>(0, 0);
+            CenterView();
         }
         this.invalidate();
     }
+
+    public void CenterView() {
+        this._viewOrigin = new Tuple2<>(0, 0);
+        this.invalidate();
+    }
 }

app/src/main/java/com/codigoparallevar/minicards/MainActivity.java

@@ -18,6 +18,7 @@ public class MainActivity extends AppCompatActivity {
     com.getbase.floatingactionbutton.AddFloatingActionButton AddPartButton;
     com.getbase.floatingactionbutton.FloatingActionButton SetDevModeButton;
     com.getbase.floatingactionbutton.FloatingActionButton SetUserModeButton;
+    com.getbase.floatingactionbutton.FloatingActionButton CenterViewButton;
 
     com.getbase.floatingactionbutton.FloatingActionsMenu devFabMenu;
     com.getbase.floatingactionbutton.FloatingActionsMenu userFabMenu;
@@ -73,6 +74,15 @@ public class MainActivity extends AppCompatActivity {
             }
         });
 
+        CenterViewButton = (com.getbase.floatingactionbutton.FloatingActionButton)
+                findViewById(R.id.center_view_button);
+        CenterViewButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                canvasView.CenterView();
+            }
+        });
+
         SetDevModeButton = (com.getbase.floatingactionbutton.FloatingActionButton)
                 findViewById(R.id.set_developer_mode_button);
         SetDevModeButton.setOnClickListener(new View.OnClickListener() {

app/src/main/res/layout/activity_main.xml

@@ -93,6 +93,15 @@
             fab:fab_title="Add new part"
             fab:fab_colorPressed="@color/white_pressed"/>
 
+        <com.getbase.floatingactionbutton.FloatingActionButton
+            android:id="@+id/center_view_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            fab:fab_icon="@drawable/ic_center_focus_weak_black"
+            fab:fab_colorNormal="@color/white"
+            fab:fab_title="Center view"
+            fab:fab_colorPressed="@color/white_pressed" />
+
         <com.getbase.floatingactionbutton.FloatingActionButton
             android:id="@+id/set_user_mode_button"
             android:layout_width="wrap_content"