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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.launcher3;
     18 
     19 import android.content.Context;
     20 import android.view.MotionEvent;
     21 import android.view.View;
     22 import android.widget.FrameLayout;
     23 import android.widget.GridLayout;
     24 
     25 /**
     26  * The grid based layout used strictly for the widget/wallpaper tab of the AppsCustomize pane
     27  */
     28 public class PagedViewGridLayout extends GridLayout implements Page {
     29     static final String TAG = "PagedViewGridLayout";
     30 
     31     private int mCellCountX;
     32     private int mCellCountY;
     33     private Runnable mOnLayoutListener;
     34 
     35     public PagedViewGridLayout(Context context, int cellCountX, int cellCountY) {
     36         super(context, null, 0);
     37         mCellCountX = cellCountX;
     38         mCellCountY = cellCountY;
     39     }
     40 
     41     int getCellCountX() {
     42         return mCellCountX;
     43     }
     44 
     45     int getCellCountY() {
     46         return mCellCountY;
     47     }
     48 
     49     /**
     50      * Clears all the key listeners for the individual widgets.
     51      */
     52     public void resetChildrenOnKeyListeners() {
     53         int childCount = getChildCount();
     54         for (int j = 0; j < childCount; ++j) {
     55             getChildAt(j).setOnKeyListener(null);
     56         }
     57     }
     58 
     59     @Override
     60     protected void onDetachedFromWindow() {
     61         super.onDetachedFromWindow();
     62         mOnLayoutListener = null;
     63     }
     64 
     65     public void setOnLayoutListener(Runnable r) {
     66         mOnLayoutListener = r;
     67     }
     68 
     69     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
     70         super.onLayout(changed, left, top, right, bottom);
     71         if (mOnLayoutListener != null) {
     72             mOnLayoutListener.run();
     73         }
     74     }
     75 
     76     @Override
     77     public boolean onTouchEvent(MotionEvent event) {
     78         boolean result = super.onTouchEvent(event);
     79         int count = getPageChildCount();
     80         if (count > 0) {
     81             // We only intercept the touch if we are tapping in empty space after the final row
     82             View child = getChildOnPageAt(count - 1);
     83             int bottom = child.getBottom();
     84             result = result || (event.getY() < bottom);
     85         }
     86         return result;
     87     }
     88 
     89     @Override
     90     public void removeAllViewsOnPage() {
     91         removeAllViews();
     92         mOnLayoutListener = null;
     93         setLayerType(LAYER_TYPE_NONE, null);
     94     }
     95 
     96     @Override
     97     public void removeViewOnPageAt(int index) {
     98         removeViewAt(index);
     99     }
    100 
    101     @Override
    102     public int getPageChildCount() {
    103         return getChildCount();
    104     }
    105 
    106     @Override
    107     public View getChildOnPageAt(int i) {
    108         return getChildAt(i);
    109     }
    110 
    111     @Override
    112     public int indexOfChildOnPage(View v) {
    113         return indexOfChild(v);
    114     }
    115 
    116     public static class LayoutParams extends FrameLayout.LayoutParams {
    117         public LayoutParams(int width, int height) {
    118             super(width, height);
    119         }
    120     }
    121 }
    122