Recovered ExtendedListView; ExtendedListFragment updated to handle to possible layouts

[pub/Android/ownCloud.git] / src / com / owncloud / android / ui / ExtendedListView.java

diff --git a/src/com/owncloud/android/ui/ExtendedListView.java b/src/com/owncloud/android/ui/ExtendedListView.java
new file mode 100644 (file)
index 0000000..33affb6
--- /dev/null
+++ b/src/com/owncloud/android/ui/ExtendedListView.java
@@ -0,0 +1,74 @@
+/* ownCloud Android client application
+ *   Copyright (C) 2012 Bartek Przybylski
+ *   Copyright (C) 2012-2015 ownCloud Inc.
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package com.owncloud.android.ui;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.widget.ListView;
+
+/**
+ * ListView allowing to specify the position of an item that should be centered in the visible area, if possible.
+ *
+ * The cleanest way I found to overcome the problem due to getHeight() returns 0 until the view is really drawn. 
+ *
+ * @author David A. Velasco
+ */
+public class ExtendedListView extends ListView {
+
+    private int mPositionToSetAndCenter = 0;
+
+    public ExtendedListView(Context context) {
+        super(context);
+    }
+
+    public ExtendedListView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ExtendedListView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     *
+     */
+    @Override
+    protected void onDraw (Canvas canvas) {
+        super.onDraw(canvas);
+        if (mPositionToSetAndCenter > 0) {
+            this.setSelectionFromTop(mPositionToSetAndCenter, getHeight() / 2);
+            mPositionToSetAndCenter = 0;
+        }
+    }
+
+    /**
+     * Public method to set the position of the item that should be centered in the visible area of the view.
+     *
+     * The position is saved here and checked in onDraw().
+     *
+     * @param position         Position (in the list of items) of the item to center in the visible area.     
+     */
+    public void setAndCenterSelection(int position) {
+        mPositionToSetAndCenter = position;
+    }
+
+}
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