--- /dev/null
+
+/*
+ * Copyright (C) 2013 The Android Open Source 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 third_parties.in.srain.cube;
+
+
+ import android.annotation.TargetApi;
+ import android.content.Context;
+ import android.database.DataSetObservable;
+ import android.database.DataSetObserver;
+ import android.os.Build;
+ import android.util.AttributeSet;
+ import android.util.Log;
+ import android.view.View;
+ import android.view.ViewGroup;
+ import android.widget.*;
+
+ import java.lang.reflect.Field;
+ import java.util.ArrayList;
+
+/**
+ * A {@link GridView} that supports adding header rows in a
+ * very similar way to {@link android.widget.ListView}.
+ * See {@link GridViewWithHeaderAndFooter#addHeaderView(View, Object, boolean)}
+ * See {@link GridViewWithHeaderAndFooter#addFooterView(View, Object, boolean)}
+ */
+public class GridViewWithHeaderAndFooter extends GridView {
+
+ public static boolean DEBUG = false;
+
+ /**
+ * A class that represents a fixed view in a list, for example a header at the top
+ * or a footer at the bottom.
+ */
+ private static class FixedViewInfo {
+ /**
+ * The view to add to the grid
+ */
+ public View view;
+ public ViewGroup viewContainer;
+ /**
+ * The data backing the view. This is returned from {@link ListAdapter#getItem(int)}.
+ */
+ public Object data;
+ /**
+ * <code>true</code> if the fixed view should be selectable in the grid
+ */
+ public boolean isSelectable;
+ }
+
+ private int mNumColumns = AUTO_FIT;
+ private View mViewForMeasureRowHeight = null;
+ private int mRowHeight = -1;
+ private static final String LOG_TAG = "grid-view-with-header-and-footer";
+
+ private ArrayList<FixedViewInfo> mHeaderViewInfos = new ArrayList<FixedViewInfo>();
+ private ArrayList<FixedViewInfo> mFooterViewInfos = new ArrayList<FixedViewInfo>();
+
+ private void initHeaderGridView() {
+ }
+
+ public GridViewWithHeaderAndFooter(Context context) {
+ super(context);
+ initHeaderGridView();
+ }
+
+ public GridViewWithHeaderAndFooter(Context context, AttributeSet attrs) {
+ super(context, attrs);
+ initHeaderGridView();
+ }
+
+ public GridViewWithHeaderAndFooter(Context context, AttributeSet attrs, int defStyle) {
+ super(context, attrs, defStyle);
+ initHeaderGridView();
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+ ListAdapter adapter = getAdapter();
+ if (adapter != null && adapter instanceof HeaderViewGridAdapter) {
+ ((HeaderViewGridAdapter) adapter).setNumColumns(getNumColumnsCompatible());
+ ((HeaderViewGridAdapter) adapter).setRowHeight(getRowHeight());
+ }
+ }
+
+ @Override
+ public void setClipChildren(boolean clipChildren) {
+ // Ignore, since the header rows depend on not being clipped
+ }
+
+ /**
+ * Do not call this method unless you know how it works.
+ *
+ * @param clipChildren
+ */
+ public void setClipChildrenSupper(boolean clipChildren) {
+ super.setClipChildren(false);
+ }
+
+ /**
+ * Add a fixed view to appear at the top of the grid. If addHeaderView is
+ * called more than once, the views will appear in the order they were
+ * added. Views added using this call can take focus if they want.
+ * <p/>
+ * NOTE: Call this before calling setAdapter. This is so HeaderGridView can wrap
+ * the supplied cursor with one that will also account for header views.
+ *
+ * @param v The view to add.
+ */
+ public void addHeaderView(View v) {
+ addHeaderView(v, null, true);
+ }
+
+ /**
+ * Add a fixed view to appear at the top of the grid. If addHeaderView is
+ * called more than once, the views will appear in the order they were
+ * added. Views added using this call can take focus if they want.
+ * <p/>
+ * NOTE: Call this before calling setAdapter. This is so HeaderGridView can wrap
+ * the supplied cursor with one that will also account for header views.
+ *
+ * @param v The view to add.
+ * @param data Data to associate with this view
+ * @param isSelectable whether the item is selectable
+ */
+ public void addHeaderView(View v, Object data, boolean isSelectable) {
+ ListAdapter adapter = getAdapter();
+ if (adapter != null && !(adapter instanceof HeaderViewGridAdapter)) {
+ throw new IllegalStateException(
+ "Cannot add header view to grid -- setAdapter has already been called.");
+ }
+
+ ViewGroup.LayoutParams lyp = v.getLayoutParams();
+
+ FixedViewInfo info = new FixedViewInfo();
+ FrameLayout fl = new FullWidthFixedViewLayout(getContext());
+
+ if (lyp != null) {
+ v.setLayoutParams(new FrameLayout.LayoutParams(lyp.width, lyp.height));
+ fl.setLayoutParams(new AbsListView.LayoutParams(lyp.width, lyp.height));
+ }
+ fl.addView(v);
+ info.view = v;
+ info.viewContainer = fl;
+ info.data = data;
+ info.isSelectable = isSelectable;
+ mHeaderViewInfos.add(info);
+ // in the case of re-adding a header view, or adding one later on,
+ // we need to notify the observer
+ if (adapter != null) {
+ ((HeaderViewGridAdapter) adapter).notifyDataSetChanged();
+ }
+ }
+
+ public void addFooterView(View v) {
+ addFooterView(v, null, true);
+ }
+
+ public void addFooterView(View v, Object data, boolean isSelectable) {
+ ListAdapter mAdapter = getAdapter();
+ if (mAdapter != null && !(mAdapter instanceof HeaderViewGridAdapter)) {
+ throw new IllegalStateException(
+ "Cannot add header view to grid -- setAdapter has already been called.");
+ }
+
+ ViewGroup.LayoutParams lyp = v.getLayoutParams();
+
+ FixedViewInfo info = new FixedViewInfo();
+ FrameLayout fl = new FullWidthFixedViewLayout(getContext());
+
+ if (lyp != null) {
+ v.setLayoutParams(new FrameLayout.LayoutParams(lyp.width, lyp.height));
+ fl.setLayoutParams(new AbsListView.LayoutParams(lyp.width, lyp.height));
+ }
+ fl.addView(v);
+ info.view = v;
+ info.viewContainer = fl;
+ info.data = data;
+ info.isSelectable = isSelectable;
+ mFooterViewInfos.add(info);
+
+ if (mAdapter != null) {
+ ((HeaderViewGridAdapter) mAdapter).notifyDataSetChanged();
+ }
+ }
+
+ public int getHeaderViewCount() {
+ return mHeaderViewInfos.size();
+ }
+
+ public int getFooterViewCount() {
+ return mFooterViewInfos.size();
+ }
+
+ /**
+ * Removes a previously-added header view.
+ *
+ * @param v The view to remove
+ * @return true if the view was removed, false if the view was not a header
+ * view
+ */
+ public boolean removeHeaderView(View v) {
+ if (mHeaderViewInfos.size() > 0) {
+ boolean result = false;
+ ListAdapter adapter = getAdapter();
+ if (adapter != null && ((HeaderViewGridAdapter) adapter).removeHeader(v)) {
+ result = true;
+ }
+ removeFixedViewInfo(v, mHeaderViewInfos);
+ return result;
+ }
+ return false;
+ }
+
+ /**
+ * Removes a previously-added footer view.
+ *
+ * @param v The view to remove
+ * @return true if the view was removed, false if the view was not a header
+ * view
+ */
+ public boolean removeFooterView(View v) {
+ if (mFooterViewInfos.size() > 0) {
+ boolean result = false;
+ ListAdapter adapter = getAdapter();
+ if (adapter != null && ((HeaderViewGridAdapter) adapter).removeFooter(v)) {
+ result = true;
+ }
+ removeFixedViewInfo(v, mFooterViewInfos);
+ return result;
+ }
+ return false;
+ }
+
+ private void removeFixedViewInfo(View v, ArrayList<FixedViewInfo> where) {
+ int len = where.size();
+ for (int i = 0; i < len; ++i) {
+ FixedViewInfo info = where.get(i);
+ if (info.view == v) {
+ where.remove(i);
+ break;
+ }
+ }
+ }
+
+ @TargetApi(11)
+ private int getNumColumnsCompatible() {
+ if (Build.VERSION.SDK_INT >= 11) {
+ return super.getNumColumns();
+ } else {
+ try {
+ Field numColumns = getClass().getSuperclass().getDeclaredField("mNumColumns");
+ numColumns.setAccessible(true);
+ return numColumns.getInt(this);
+ } catch (Exception e) {
+ if (mNumColumns != -1) {
+ return mNumColumns;
+ }
+ throw new RuntimeException("Can not determine the mNumColumns for this API platform, please call setNumColumns to set it.");
+ }
+ }
+ }
+
+ @TargetApi(16)
+ private int getColumnWidthCompatible() {
+ if (Build.VERSION.SDK_INT >= 16) {
+ return super.getColumnWidth();
+ } else {
+ try {
+ Field numColumns = getClass().getSuperclass().getDeclaredField("mColumnWidth");
+ numColumns.setAccessible(true);
+ return numColumns.getInt(this);
+ } catch (NoSuchFieldException e) {
+ throw new RuntimeException(e);
+ } catch (IllegalAccessException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ }
+
+ @Override
+ protected void onDetachedFromWindow() {
+ super.onDetachedFromWindow();
+ mViewForMeasureRowHeight = null;
+ }
+
+ public void invalidateRowHeight() {
+ mRowHeight = -1;
+ }
+
+ public int getRowHeight() {
+ if (mRowHeight > 0) {
+ return mRowHeight;
+ }
+ ListAdapter adapter = getAdapter();
+ int numColumns = getNumColumnsCompatible();
+
+ // adapter has not been set or has no views in it;
+ if (adapter == null || adapter.getCount() <= numColumns * (mHeaderViewInfos.size() + mFooterViewInfos.size())) {
+ return -1;
+ }
+ int mColumnWidth = getColumnWidthCompatible();
+ View view = getAdapter().getView(numColumns * mHeaderViewInfos.size(), mViewForMeasureRowHeight, this);
+ AbsListView.LayoutParams p = (AbsListView.LayoutParams) view.getLayoutParams();
+ if (p == null) {
+ p = new AbsListView.LayoutParams(-1, -2, 0);
+ view.setLayoutParams(p);
+ }
+ int childHeightSpec = getChildMeasureSpec(
+ MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 0, p.height);
+ int childWidthSpec = getChildMeasureSpec(
+ MeasureSpec.makeMeasureSpec(mColumnWidth, MeasureSpec.EXACTLY), 0, p.width);
+ view.measure(childWidthSpec, childHeightSpec);
+ mViewForMeasureRowHeight = view;
+ mRowHeight = view.getMeasuredHeight();
+ return mRowHeight;
+ }
+
+ @TargetApi(11)
+ public void tryToScrollToBottomSmoothly() {
+ int lastPos = getAdapter().getCount() - 1;
+ if (Build.VERSION.SDK_INT >= 11) {
+ smoothScrollToPositionFromTop(lastPos, 0);
+ } else {
+ setSelection(lastPos);
+ }
+ }
+
+ @TargetApi(11)
+ public void tryToScrollToBottomSmoothly(int duration) {
+ int lastPos = getAdapter().getCount() - 1;
+ if (Build.VERSION.SDK_INT >= 11) {
+ smoothScrollToPositionFromTop(lastPos, 0, duration);
+ } else {
+ setSelection(lastPos);
+ }
+ }
+
+ @Override
+ public void setAdapter(ListAdapter adapter) {
+ if (mHeaderViewInfos.size() > 0 || mFooterViewInfos.size() > 0) {
+ HeaderViewGridAdapter headerViewGridAdapter = new HeaderViewGridAdapter(mHeaderViewInfos, mFooterViewInfos, adapter);
+ int numColumns = getNumColumnsCompatible();
+ if (numColumns > 1) {
+ headerViewGridAdapter.setNumColumns(numColumns);
+ }
+ headerViewGridAdapter.setRowHeight(getRowHeight());
+ super.setAdapter(headerViewGridAdapter);
+ } else {
+ super.setAdapter(adapter);
+ }
+ }
+
+ /**
+ * full width
+ */
+ private class FullWidthFixedViewLayout extends FrameLayout {
+
+ public FullWidthFixedViewLayout(Context context) {
+ super(context);
+ }
+
+ @Override
+ protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+ int realLeft = GridViewWithHeaderAndFooter.this.getPaddingLeft() + getPaddingLeft();
+ // Try to make where it should be, from left, full width
+ if (realLeft != left) {
+ offsetLeftAndRight(realLeft - left);
+ }
+ super.onLayout(changed, left, top, right, bottom);
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ int targetWidth = GridViewWithHeaderAndFooter.this.getMeasuredWidth()
+ - GridViewWithHeaderAndFooter.this.getPaddingLeft()
+ - GridViewWithHeaderAndFooter.this.getPaddingRight();
+ widthMeasureSpec = MeasureSpec.makeMeasureSpec(targetWidth,
+ MeasureSpec.getMode(widthMeasureSpec));
+ super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+ }
+ }
+
+ @Override
+ public void setNumColumns(int numColumns) {
+ super.setNumColumns(numColumns);
+ mNumColumns = numColumns;
+ ListAdapter adapter = getAdapter();
+ if (adapter != null && adapter instanceof HeaderViewGridAdapter) {
+ ((HeaderViewGridAdapter) adapter).setNumColumns(numColumns);
+ }
+ }
+
+ /**
+ * ListAdapter used when a HeaderGridView has header views. This ListAdapter
+ * wraps another one and also keeps track of the header views and their
+ * associated data objects.
+ * <p>This is intended as a base class; you will probably not need to
+ * use this class directly in your own code.
+ */
+ private static class HeaderViewGridAdapter implements WrapperListAdapter, Filterable {
+ // This is used to notify the container of updates relating to number of columns
+ // or headers changing, which changes the number of placeholders needed
+ private final DataSetObservable mDataSetObservable = new DataSetObservable();
+ private final ListAdapter mAdapter;
+ static final ArrayList<FixedViewInfo> EMPTY_INFO_LIST =
+ new ArrayList<FixedViewInfo>();
+
+ // This ArrayList is assumed to NOT be null.
+ ArrayList<FixedViewInfo> mHeaderViewInfos;
+ ArrayList<FixedViewInfo> mFooterViewInfos;
+ private int mNumColumns = 1;
+ private int mRowHeight = -1;
+ boolean mAreAllFixedViewsSelectable;
+ private final boolean mIsFilterable;
+ private boolean mCachePlaceHoldView = true;
+ // From Recycle Bin or calling getView, this a question...
+ private boolean mCacheFirstHeaderView = false;
+
+ public HeaderViewGridAdapter(ArrayList<FixedViewInfo> headerViewInfos, ArrayList<FixedViewInfo> footViewInfos, ListAdapter adapter) {
+ mAdapter = adapter;
+ mIsFilterable = adapter instanceof Filterable;
+ if (headerViewInfos == null) {
+ mHeaderViewInfos = EMPTY_INFO_LIST;
+ } else {
+ mHeaderViewInfos = headerViewInfos;
+ }
+
+ if (footViewInfos == null) {
+ mFooterViewInfos = EMPTY_INFO_LIST;
+ } else {
+ mFooterViewInfos = footViewInfos;
+ }
+ mAreAllFixedViewsSelectable = areAllListInfosSelectable(mHeaderViewInfos)
+ && areAllListInfosSelectable(mFooterViewInfos);
+ }
+
+ public void setNumColumns(int numColumns) {
+ if (numColumns < 1) {
+ return;
+ }
+ if (mNumColumns != numColumns) {
+ mNumColumns = numColumns;
+ notifyDataSetChanged();
+ }
+ }
+
+ public void setRowHeight(int height) {
+ mRowHeight = height;
+ }
+
+ public int getHeadersCount() {
+ return mHeaderViewInfos.size();
+ }
+
+ public int getFootersCount() {
+ return mFooterViewInfos.size();
+ }
+
+ @Override
+ public boolean isEmpty() {
+ return (mAdapter == null || mAdapter.isEmpty()) && getHeadersCount() == 0 && getFootersCount() == 0;
+ }
+
+ private boolean areAllListInfosSelectable(ArrayList<FixedViewInfo> infos) {
+ if (infos != null) {
+ for (FixedViewInfo info : infos) {
+ if (!info.isSelectable) {
+ return false;
+ }
+ }
+ }
+ return true;
+ }
+
+ public boolean removeHeader(View v) {
+ for (int i = 0; i < mHeaderViewInfos.size(); i++) {
+ FixedViewInfo info = mHeaderViewInfos.get(i);
+ if (info.view == v) {
+ mHeaderViewInfos.remove(i);
+ mAreAllFixedViewsSelectable =
+ areAllListInfosSelectable(mHeaderViewInfos) && areAllListInfosSelectable(mFooterViewInfos);
+ mDataSetObservable.notifyChanged();
+ return true;
+ }
+ }
+ return false;
+ }
+
+ public boolean removeFooter(View v) {
+ for (int i = 0; i < mFooterViewInfos.size(); i++) {
+ FixedViewInfo info = mFooterViewInfos.get(i);
+ if (info.view == v) {
+ mFooterViewInfos.remove(i);
+ mAreAllFixedViewsSelectable =
+ areAllListInfosSelectable(mHeaderViewInfos) && areAllListInfosSelectable(mFooterViewInfos);
+ mDataSetObservable.notifyChanged();
+ return true;
+ }
+ }
+ return false;
+ }
+
+ @Override
+ public int getCount() {
+ if (mAdapter != null) {
+ return (getFootersCount() + getHeadersCount()) * mNumColumns + getAdapterAndPlaceHolderCount();
+ } else {
+ return (getFootersCount() + getHeadersCount()) * mNumColumns;
+ }
+ }
+
+ @Override
+ public boolean areAllItemsEnabled() {
+ if (mAdapter != null) {
+ return mAreAllFixedViewsSelectable && mAdapter.areAllItemsEnabled();
+ } else {
+ return true;
+ }
+ }
+
+ private int getAdapterAndPlaceHolderCount() {
+ final int adapterCount = (int) (Math.ceil(1f * mAdapter.getCount() / mNumColumns) * mNumColumns);
+ return adapterCount;
+ }
+
+ @Override
+ public boolean isEnabled(int position) {
+ // Header (negative positions will throw an IndexOutOfBoundsException)
+ int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+ if (position < numHeadersAndPlaceholders) {
+ return position % mNumColumns == 0
+ && mHeaderViewInfos.get(position / mNumColumns).isSelectable;
+ }
+
+ // Adapter
+ final int adjPosition = position - numHeadersAndPlaceholders;
+ int adapterCount = 0;
+ if (mAdapter != null) {
+ adapterCount = getAdapterAndPlaceHolderCount();
+ if (adjPosition < adapterCount) {
+ return adjPosition < mAdapter.getCount() && mAdapter.isEnabled(adjPosition);
+ }
+ }
+
+ // Footer (off-limits positions will throw an IndexOutOfBoundsException)
+ final int footerPosition = adjPosition - adapterCount;
+ return footerPosition % mNumColumns == 0
+ && mFooterViewInfos.get(footerPosition / mNumColumns).isSelectable;
+ }
+
+ @Override
+ public Object getItem(int position) {
+ // Header (negative positions will throw an ArrayIndexOutOfBoundsException)
+ int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+ if (position < numHeadersAndPlaceholders) {
+ if (position % mNumColumns == 0) {
+ return mHeaderViewInfos.get(position / mNumColumns).data;
+ }
+ return null;
+ }
+
+ // Adapter
+ final int adjPosition = position - numHeadersAndPlaceholders;
+ int adapterCount = 0;
+ if (mAdapter != null) {
+ adapterCount = getAdapterAndPlaceHolderCount();
+ if (adjPosition < adapterCount) {
+ if (adjPosition < mAdapter.getCount()) {
+ return mAdapter.getItem(adjPosition);
+ } else {
+ return null;
+ }
+ }
+ }
+
+ // Footer (off-limits positions will throw an IndexOutOfBoundsException)
+ final int footerPosition = adjPosition - adapterCount;
+ if (footerPosition % mNumColumns == 0) {
+ return mFooterViewInfos.get(footerPosition).data;
+ } else {
+ return null;
+ }
+ }
+
+ @Override
+ public long getItemId(int position) {
+ int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+ if (mAdapter != null && position >= numHeadersAndPlaceholders) {
+ int adjPosition = position - numHeadersAndPlaceholders;
+ int adapterCount = mAdapter.getCount();
+ if (adjPosition < adapterCount) {
+ return mAdapter.getItemId(adjPosition);
+ }
+ }
+ return -1;
+ }
+
+ @Override
+ public boolean hasStableIds() {
+ if (mAdapter != null) {
+ return mAdapter.hasStableIds();
+ }
+ return false;
+ }
+
+ @Override
+ public View getView(int position, View convertView, ViewGroup parent) {
+ if (DEBUG) {
+ Log.d(LOG_TAG, String.format("getView: %s, reused: %s", position, convertView == null));
+ }
+ // Header (negative positions will throw an ArrayIndexOutOfBoundsException)
+ int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+ if (position < numHeadersAndPlaceholders) {
+ View headerViewContainer = mHeaderViewInfos
+ .get(position / mNumColumns).viewContainer;
+ if (position % mNumColumns == 0) {
+ return headerViewContainer;
+ } else {
+ if (convertView == null) {
+ convertView = new View(parent.getContext());
+ }
+ // We need to do this because GridView uses the height of the last item
+ // in a row to determine the height for the entire row.
+ convertView.setVisibility(View.INVISIBLE);
+ convertView.setMinimumHeight(headerViewContainer.getHeight());
+ return convertView;
+ }
+ }
+ // Adapter
+ final int adjPosition = position - numHeadersAndPlaceholders;
+ int adapterCount = 0;
+ if (mAdapter != null) {
+ adapterCount = getAdapterAndPlaceHolderCount();
+ if (adjPosition < adapterCount) {
+ if (adjPosition < mAdapter.getCount()) {
+ View view = mAdapter.getView(adjPosition, convertView, parent);
+ return view;
+ } else {
+ if (convertView == null) {
+ convertView = new View(parent.getContext());
+ }
+ convertView.setVisibility(View.INVISIBLE);
+ convertView.setMinimumHeight(mRowHeight);
+ return convertView;
+ }
+ }
+ }
+ // Footer
+ final int footerPosition = adjPosition - adapterCount;
+ if (footerPosition < getCount()) {
+ View footViewContainer = mFooterViewInfos
+ .get(footerPosition / mNumColumns).viewContainer;
+ if (position % mNumColumns == 0) {
+ return footViewContainer;
+ } else {
+ if (convertView == null) {
+ convertView = new View(parent.getContext());
+ }
+ // We need to do this because GridView uses the height of the last item
+ // in a row to determine the height for the entire row.
+ convertView.setVisibility(View.INVISIBLE);
+ convertView.setMinimumHeight(footViewContainer.getHeight());
+ return convertView;
+ }
+ }
+ throw new ArrayIndexOutOfBoundsException(position);
+ }
+
+ @Override
+ public int getItemViewType(int position) {
+
+ final int numHeadersAndPlaceholders = getHeadersCount() * mNumColumns;
+ final int adapterViewTypeStart = mAdapter == null ? 0 : mAdapter.getViewTypeCount() - 1;
+ int type = AdapterView.ITEM_VIEW_TYPE_HEADER_OR_FOOTER;
+ if (mCachePlaceHoldView) {
+ // Header
+ if (position < numHeadersAndPlaceholders) {
+ if (position == 0) {
+ if (mCacheFirstHeaderView) {
+ type = adapterViewTypeStart + mHeaderViewInfos.size() + mFooterViewInfos.size() + 1 + 1;
+ }
+ }
+ if (position % mNumColumns != 0) {
+ type = adapterViewTypeStart + (position / mNumColumns + 1);
+ }
+ }
+ }
+
+ // Adapter
+ final int adjPosition = position - numHeadersAndPlaceholders;
+ int adapterCount = 0;
+ if (mAdapter != null) {
+ adapterCount = getAdapterAndPlaceHolderCount();
+ if (adjPosition >= 0 && adjPosition < adapterCount) {
+ if (adjPosition < mAdapter.getCount()) {
+ type = mAdapter.getItemViewType(adjPosition);
+ } else {
+ if (mCachePlaceHoldView) {
+ type = adapterViewTypeStart + mHeaderViewInfos.size() + 1;
+ }
+ }
+ }
+ }
+
+ if (mCachePlaceHoldView) {
+ // Footer
+ final int footerPosition = adjPosition - adapterCount;
+ if (footerPosition >= 0 && footerPosition < getCount() && (footerPosition % mNumColumns) != 0) {
+ type = adapterViewTypeStart + mHeaderViewInfos.size() + 1 + (footerPosition / mNumColumns + 1);
+ }
+ }
+ if (DEBUG) {
+ Log.d(LOG_TAG, String.format("getItemViewType: pos: %s, result: %s", position, type, mCachePlaceHoldView, mCacheFirstHeaderView));
+ }
+ return type;
+ }
+
+ /**
+ * content view, content view holder, header[0], header and footer placeholder(s)
+ *
+ * @return
+ */
+ @Override
+ public int getViewTypeCount() {
+ int count = mAdapter == null ? 1 : mAdapter.getViewTypeCount();
+ if (mCachePlaceHoldView) {
+ int offset = mHeaderViewInfos.size() + 1 + mFooterViewInfos.size();
+ if (mCacheFirstHeaderView) {
+ offset += 1;
+ }
+ count += offset;
+ }
+ if (DEBUG) {
+ Log.d(LOG_TAG, String.format("getViewTypeCount: %s", count));
+ }
+ return count;
+ }
+
+ @Override
+ public void registerDataSetObserver(DataSetObserver observer) {
+ mDataSetObservable.registerObserver(observer);
+ if (mAdapter != null) {
+ mAdapter.registerDataSetObserver(observer);
+ }
+ }
+
+ @Override
+ public void unregisterDataSetObserver(DataSetObserver observer) {
+ mDataSetObservable.unregisterObserver(observer);
+ if (mAdapter != null) {
+ mAdapter.unregisterDataSetObserver(observer);
+ }
+ }
+
+ @Override
+ public Filter getFilter() {
+ if (mIsFilterable) {
+ return ((Filterable) mAdapter).getFilter();
+ }
+ return null;
+ }
+
+ @Override
+ public ListAdapter getWrappedAdapter() {
+ return mAdapter;
+ }
+
+ public void notifyDataSetChanged() {
+ mDataSetObservable.notifyChanged();
+ }
+ }
+}
projects / pub / Android / ownCloud.git / blobdiff