1 files changed, 172 insertions, 0 deletions
diff --git a/src/com/viewpagerindicator/IconPageIndicator.java b/src/com/viewpagerindicator/IconPageIndicator.java
new file mode 100644
index 0000000..2e7d246
--- /dev/null
+++ b/src/com/viewpagerindicator/IconPageIndicator.java
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ * Copyright (C) 2012 Jake Wharton
+ *
+ * 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 com.viewpagerindicator;
+
+import android.content.Context;
+import android.support.v4.view.PagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v4.view.ViewPager.OnPageChangeListener;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.HorizontalScrollView;
+import android.widget.ImageView;
+
+import static android.view.ViewGroup.LayoutParams.FILL_PARENT;
+import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
+
+/**
+ * This widget implements the dynamic action bar tab behavior that can change
+ * across different configurations or circumstances.
+ */
+public class IconPageIndicator extends HorizontalScrollView implements PageIndicator {
+    private final IcsLinearLayout mIconsLayout;
+
+    private ViewPager mViewPager;
+    private OnPageChangeListener mListener;
+    private Runnable mIconSelector;
+    private int mSelectedIndex;
+
+    public IconPageIndicator(Context context) {
+        this(context, null);
+    }
+
+    public IconPageIndicator(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setHorizontalScrollBarEnabled(false);
+
+        mIconsLayout = new IcsLinearLayout(context, R.attr.vpiIconPageIndicatorStyle);
+        addView(mIconsLayout, new LayoutParams(WRAP_CONTENT, FILL_PARENT, Gravity.CENTER));
+    }
+
+    private void animateToIcon(final int position) {
+        final View iconView = mIconsLayout.getChildAt(position);
+        if (mIconSelector != null) {
+            removeCallbacks(mIconSelector);
+        }
+        mIconSelector = new Runnable() {
+            public void run() {
+                final int scrollPos = iconView.getLeft() - (getWidth() - iconView.getWidth()) / 2;
+                smoothScrollTo(scrollPos, 0);
+                mIconSelector = null;
+            }
+        };
+        post(mIconSelector);
+    }
+
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+        if (mIconSelector != null) {
+            // Re-post the selector we saved
+            post(mIconSelector);
+        }
+    }
+
+    @Override
+    public void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        if (mIconSelector != null) {
+            removeCallbacks(mIconSelector);
+        }
+    }
+
+    @Override
+    public void onPageScrollStateChanged(int arg0) {
+        if (mListener != null) {
+            mListener.onPageScrollStateChanged(arg0);
+        }
+    }
+
+    @Override
+    public void onPageScrolled(int arg0, float arg1, int arg2) {
+        if (mListener != null) {
+            mListener.onPageScrolled(arg0, arg1, arg2);
+        }
+    }
+
+    @Override
+    public void onPageSelected(int arg0) {
+        setCurrentItem(arg0);
+        if (mListener != null) {
+            mListener.onPageSelected(arg0);
+        }
+    }
+
+    @Override
+    public void setViewPager(ViewPager view) {
+        if (mViewPager == view) {
+            return;
+        }
+        if (mViewPager != null) {
+            mViewPager.setOnPageChangeListener(null);
+        }
+        PagerAdapter adapter = view.getAdapter();
+        if (adapter == null) {
+            throw new IllegalStateException("ViewPager does not have adapter instance.");
+        }
+        mViewPager = view;
+        view.setOnPageChangeListener(this);
+        notifyDataSetChanged();
+    }
+
+    public void notifyDataSetChanged() {
+        mIconsLayout.removeAllViews();
+        IconPagerAdapter iconAdapter = (IconPagerAdapter) mViewPager.getAdapter();
+        int count = iconAdapter.getCount();
+        for (int i = 0; i < count; i++) {
+            ImageView view = new ImageView(getContext(), null, R.attr.vpiIconPageIndicatorStyle);
+            view.setImageResource(iconAdapter.getIconResId(i));
+            mIconsLayout.addView(view);
+        }
+        if (mSelectedIndex > count) {
+            mSelectedIndex = count - 1;
+        }
+        setCurrentItem(mSelectedIndex);
+        requestLayout();
+    }
+
+    @Override
+    public void setViewPager(ViewPager view, int initialPosition) {
+        setViewPager(view);
+        setCurrentItem(initialPosition);
+    }
+
+    @Override
+    public void setCurrentItem(int item) {
+        if (mViewPager == null) {
+            throw new IllegalStateException("ViewPager has not been bound.");
+        }
+        mSelectedIndex = item;
+        mViewPager.setCurrentItem(item);
+
+        int tabCount = mIconsLayout.getChildCount();
+        for (int i = 0; i < tabCount; i++) {
+            View child = mIconsLayout.getChildAt(i);
+            boolean isSelected = (i == item);
+            child.setSelected(isSelected);
+            if (isSelected) {
+                animateToIcon(item);
+            }
+        }
+    }
+
+    @Override
+    public void setOnPageChangeListener(OnPageChangeListener listener) {
+        mListener = listener;
+    }
+}