1 files changed, 114 insertions, 0 deletions
diff --git a/src/org/cyanogenmod/wallpapers/photophase/widgets/VerticalEndlessScroller.java b/src/org/cyanogenmod/wallpapers/photophase/widgets/VerticalEndlessScroller.java
new file mode 100644
index 0000000..67a1f17
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+++ b/src/org/cyanogenmod/wallpapers/photophase/widgets/VerticalEndlessScroller.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2013 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.cyanogenmod.wallpapers.photophase.widgets;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.ScrollView;
+
+/**
+ * A scroll view that notifies the end of the scroll to create new views
+ * dynamically.
+ */
+public class VerticalEndlessScroller extends ScrollView {
+
+    /**
+     * Interface to communicate end-scroll events
+     */
+    public interface OnEndScrollListener {
+        /**
+         * Called when the scroll reachs the end of the scroll
+         */
+        void onEndScroll();
+    }
+
+    private OnEndScrollListener mCallback;
+    private int mEndPadding = 0;
+    private boolean mSwitch = false;
+
+    /**
+     * Constructor of <code>VerticalEndlessScroller</code>.
+     *
+     * @param context The current context
+     */
+    public VerticalEndlessScroller(Context context) {
+        super(context);
+    }
+
+    /**
+     * Constructor of <code>VerticalEndlessScroller</code>.
+     *
+     * @param context The current context
+     * @param attrs The attributes of the XML tag that is inflating the view.
+     */
+    public VerticalEndlessScroller(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    /**
+     * Constructor of <code>VerticalEndlessScroller</code>.
+     *
+     * @param context The current context
+     * @param attrs The attributes of the XML tag that is inflating the view.
+     * @param defStyle The default style to apply to this view. If 0, no style
+     *        will be applied (beyond what is included in the theme). This may
+     *        either be an attribute resource, whose value will be retrieved
+     *        from the current theme, or an explicit style resource.
+     */
+    public VerticalEndlessScroller(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    /**
+     * Method that set the callback for notify end-scroll events
+     *
+     * @param callback The callback
+     */
+    public void setCallback(OnEndScrollListener callback) {
+        mCallback = callback;
+    }
+
+    /**
+     * Method that set the end padding for fired the event
+     *
+     * @param endPadding The end padding
+     */
+    public void setEndPadding(int endPadding) {
+        this.mEndPadding = endPadding;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
+        // We take the last child in the scrollview
+        View view = getChildAt(getChildCount() - 1);
+        int diff = (view.getBottom() - (getHeight() + getScrollY()));
+        if ((!mSwitch && diff <= mEndPadding)) {
+            if (mCallback != null) {
+                mCallback.onEndScroll();
+                mSwitch = true;
+                return;
+            }
+        } else if (diff > mEndPadding) {
+            mSwitch = false;
+        }
+    }
+
+}