--- /dev/null
+package org.anbox.appmgr;
+
+/*
+ * Created by Thomas Barrasso on 9/11/12.
+ * Copyright (c) 2012 Loupe Inc.
+ *
+ * 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.
+ */
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Handler;
+import android.support.v4.app.Fragment;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.animation.AnimationUtils;
+import android.widget.AdapterView;
+import android.widget.FrameLayout;
+import android.widget.GridView;
+import android.widget.LinearLayout;
+import android.widget.ListAdapter;
+import android.widget.ListView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+/**
+ * Based on {@link android.app.ListFragment} but adapted for {@link GridView}.
+ */
+public class GridFragment extends Fragment {
+
+ static final int INTERNAL_EMPTY_ID = 0x00ff0001;
+ static final int INTERNAL_PROGRESS_CONTAINER_ID = 0x00ff0002;
+ static final int INTERNAL_LIST_CONTAINER_ID = 0x00ff0003;
+
+ final private Handler mHandler = new Handler();
+
+ final private Runnable mRequestFocus = new Runnable() {
+ public void run() {
+ mGrid.focusableViewAvailable(mGrid);
+ }
+ };
+
+ final private AdapterView.OnItemClickListener mOnClickListener
+ = new AdapterView.OnItemClickListener() {
+ public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
+ onGridItemClick((GridView) parent, v, position, id);
+ }
+ };
+
+ ListAdapter mAdapter;
+ GridView mGrid;
+ View mEmptyView;
+ TextView mStandardEmptyView;
+ View mProgressContainer;
+ View mGridContainer;
+ CharSequence mEmptyText;
+ boolean mGridShown;
+
+ public GridFragment() { }
+
+ /**
+ * Provide default implementation to return a simple grid view. Subclasses
+ * can override to replace with their own layout. If doing so, the
+ * returned view hierarchy <em>must</em> have a GridView whose id
+ * is {@link android.R.id#list android.R.id.list} and can optionally
+ * have a sibling view id {@link android.R.id#empty android.R.id.empty}
+ * that is to be shown when the grid is empty.
+ *
+ * <p>If you are overriding this method with your own custom content,
+ * consider including the standard layout {@link android.R.layout#list_content}
+ * in your layout file, so that you continue to retain all of the standard
+ * behavior of ListFragment. In particular, this is currently the only
+ * way to have the built-in indeterminant progress state be shown.
+ */
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+ final Context context = getActivity();
+
+ FrameLayout root = new FrameLayout(context);
+
+ // ------------------------------------------------------------------
+
+ LinearLayout pframe = new LinearLayout(context);
+ pframe.setId(INTERNAL_PROGRESS_CONTAINER_ID);
+ pframe.setOrientation(LinearLayout.VERTICAL);
+ pframe.setVisibility(View.GONE);
+ pframe.setGravity(Gravity.CENTER);
+
+ ProgressBar progress = new ProgressBar(context, null,
+ android.R.attr.progressBarStyleLarge);
+ pframe.addView(progress, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
+
+ root.addView(pframe, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+ // ------------------------------------------------------------------
+
+ FrameLayout lframe = new FrameLayout(context);
+ lframe.setId(INTERNAL_LIST_CONTAINER_ID);
+
+ TextView tv = new TextView(getActivity());
+ tv.setId(INTERNAL_EMPTY_ID);
+ tv.setGravity(Gravity.CENTER);
+ lframe.addView(tv, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+ GridView lv = new GridView(getActivity());
+ lv.setId(android.R.id.list);
+ lv.setDrawSelectorOnTop(false);
+ lv.setColumnWidth(convertDpToPixels(60, getActivity()));
+ lv.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);
+ lv.setNumColumns(GridView.AUTO_FIT);
+ lv.setHorizontalSpacing(convertDpToPixels(20, getActivity()));
+ lv.setVerticalSpacing(convertDpToPixels(20, getActivity()));
+ lv.setSmoothScrollbarEnabled(true);
+
+ // disable overscroll
+ if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
+ lv.setOverScrollMode(ListView.OVER_SCROLL_NEVER);
+ }
+
+ lframe.addView(lv, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+ root.addView(lframe, new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+ // ------------------------------------------------------------------
+
+ root.setLayoutParams(new FrameLayout.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+
+ return root;
+ }
+
+ /**
+ * Attach to grid view once the view hierarchy has been created.
+ */
+ @Override
+ public void onViewCreated(View view, Bundle savedInstanceState) {
+ super.onViewCreated(view, savedInstanceState);
+ ensureGrid();
+ }
+
+ /**
+ * Detach from {@link GridView}
+ */
+ @Override
+ public void onDestroyView() {
+ mHandler.removeCallbacks(mRequestFocus);
+ mGrid = null;
+ mGridShown = false;
+ mEmptyView = mProgressContainer = mGridContainer = null;
+ mStandardEmptyView = null;
+ super.onDestroyView();
+ }
+
+ public static int convertDpToPixels(float dp, Context context){
+ Resources resources = context.getResources();
+ return (int) TypedValue.applyDimension(
+ TypedValue.COMPLEX_UNIT_DIP,
+ dp,
+ resources.getDisplayMetrics()
+ );
+ }
+
+ /**
+ * This method will be called when an item in the grid is selected.
+ * Subclasses should override. Subclasses can call
+ * getGridView().getItemAtPosition(position) if they need to access the
+ * data associated with the selected item.
+ *
+ * @param g The {@link GridView} where the click happened
+ * @param v The view that was clicked within the {@link GridView}
+ * @param position The position of the view in the grid
+ * @param id The row id of the item that was clicked
+ */
+ public void onGridItemClick(GridView g, View v, int position, long id) {
+
+ }
+
+ /**
+ * Provide the cursor for the {@link GridView}.
+ */
+ public void setGridAdapter(ListAdapter adapter) {
+ final boolean hadAdapter = (mAdapter != null);
+ mAdapter = adapter;
+ if (mGrid != null) {
+ mGrid.setAdapter(adapter);
+ if (!mGridShown && !hadAdapter) {
+ // The grid was hidden, and previously didn't have an
+ // adapter. It is now time to show it.
+ setGridShown(true, (getView().getWindowToken() != null));
+ }
+ }
+ }
+
+ /**
+ * Set the currently selected grid item to the specified
+ * position with the adapter's data
+ *
+ * @param position
+ */
+ public void setSelection(int position) {
+ ensureGrid();
+ mGrid.setSelection(position);
+ }
+
+ /**
+ * Get the position of the currently selected grid item.
+ */
+ public int getSelectedItemPosition() {
+ ensureGrid();
+ return mGrid.getSelectedItemPosition();
+ }
+
+ /**
+ * Get the cursor row ID of the currently selected grid item.
+ */
+ public long getSelectedItemId() {
+ ensureGrid();
+ return mGrid.getSelectedItemId();
+ }
+
+ /**
+ * Get the activity's {@link GridView} widget.
+ */
+ public GridView getGridView() {
+ ensureGrid();
+ return mGrid;
+ }
+
+ /**
+ * The default content for a ListFragment has a TextView that can
+ * be shown when the grid is empty. If you would like to have it
+ * shown, call this method to supply the text it should use.
+ */
+ public void setEmptyText(CharSequence text) {
+ ensureGrid();
+ if (mStandardEmptyView == null) {
+ throw new IllegalStateException("Can't be used with a custom content view");
+ }
+ mStandardEmptyView.setText(text);
+ if (mEmptyText == null) {
+ mGrid.setEmptyView(mStandardEmptyView);
+ }
+ mEmptyText = text;
+ }
+
+ /**
+ * Control whether the grid is being displayed. You can make it not
+ * displayed if you are waiting for the initial data to show in it. During
+ * this time an indeterminant progress indicator will be shown instead.
+ *
+ * <p>Applications do not normally need to use this themselves. The default
+ * behavior of ListFragment is to start with the grid not being shown, only
+ * showing it once an adapter is given with {@link #setGridAdapter(ListAdapter)}.
+ * If the grid at that point had not been shown, when it does get shown
+ * it will be do without the user ever seeing the hidden state.
+ *
+ * @param shown If true, the grid view is shown; if false, the progress
+ * indicator. The initial value is true.
+ */
+ public void setGridShown(boolean shown) {
+ setGridShown(shown, true);
+ }
+
+ /**
+ * Like {@link #setGridShown(boolean)}, but no animation is used when
+ * transitioning from the previous state.
+ */
+ public void setGridShownNoAnimation(boolean shown) {
+ setGridShown(shown, false);
+ }
+
+ /**
+ * Control whether the grid is being displayed. You can make it not
+ * displayed if you are waiting for the initial data to show in it. During
+ * this time an indeterminant progress indicator will be shown instead.
+ *
+ * @param shown If true, the grid view is shown; if false, the progress
+ * indicator. The initial value is true.
+ * @param animate If true, an animation will be used to transition to the
+ * new state.
+ */
+ private void setGridShown(boolean shown, boolean animate) {
+ ensureGrid();
+ if (mProgressContainer == null) {
+ throw new IllegalStateException("Can't be used with a custom content view");
+ }
+ if (mGridShown == shown) {
+ return;
+ }
+ mGridShown = shown;
+ if (shown) {
+ if (animate) {
+ mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_out));
+ mGridContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_in));
+ } else {
+ mProgressContainer.clearAnimation();
+ mGridContainer.clearAnimation();
+ }
+ mProgressContainer.setVisibility(View.GONE);
+ mGridContainer.setVisibility(View.VISIBLE);
+ } else {
+ if (animate) {
+ mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_in));
+ mGridContainer.startAnimation(AnimationUtils.loadAnimation(
+ getActivity(), android.R.anim.fade_out));
+ } else {
+ mProgressContainer.clearAnimation();
+ mGridContainer.clearAnimation();
+ }
+ mProgressContainer.setVisibility(View.VISIBLE);
+ mGridContainer.setVisibility(View.GONE);
+ }
+ }
+
+ /**
+ * Get the ListAdapter associated with this activity's {@link GridView}.
+ */
+ public ListAdapter getGridAdapter() {
+ return mAdapter;
+ }
+
+ private void ensureGrid() {
+ if (mGrid != null) {
+ return;
+ }
+ View root = getView();
+ if (root == null) {
+ throw new IllegalStateException("Content view not yet created");
+ }
+ if (root instanceof GridView) {
+ mGrid = (GridView) root;
+ } else {
+ mStandardEmptyView = (TextView)root.findViewById(INTERNAL_EMPTY_ID);
+ if (mStandardEmptyView == null) {
+ mEmptyView = root.findViewById(android.R.id.empty);
+ } else {
+ mStandardEmptyView.setVisibility(View.GONE);
+ }
+ mProgressContainer = root.findViewById(INTERNAL_PROGRESS_CONTAINER_ID);
+ mGridContainer = root.findViewById(INTERNAL_LIST_CONTAINER_ID);
+ View rawGridView = root.findViewById(android.R.id.list);
+ if (!(rawGridView instanceof GridView)) {
+ if (rawGridView == null) {
+ throw new RuntimeException(
+ "Your content must have a GridView whose id attribute is " +
+ "'android.R.id.list'");
+ }
+ throw new RuntimeException(
+ "Content has view with id attribute 'android.R.id.list' "
+ + "that is not a GridView class");
+ }
+ mGrid = (GridView) rawGridView;
+ if (mEmptyView != null) {
+ mGrid.setEmptyView(mEmptyView);
+ } else if (mEmptyText != null) {
+ mStandardEmptyView.setText(mEmptyText);
+ mGrid.setEmptyView(mStandardEmptyView);
+ }
+ }
+ mGridShown = true;
+ mGrid.setOnItemClickListener(mOnClickListener);
+ if (mAdapter != null) {
+ ListAdapter adapter = mAdapter;
+ mAdapter = null;
+ setGridAdapter(adapter);
+ } else {
+ // We are starting without an adapter, so assume we won't
+ // have our data right away and start with the progress indicator.
+ if (mProgressContainer != null) {
+ setGridShown(false, false);
+ }
+ }
+ mHandler.post(mRequestFocus);
+ }
+}
Code Review / iec.git / blobdiff