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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.launcher2;
     18 
     19 import android.content.ComponentName;
     20 import android.content.Context;
     21 import android.content.res.ColorStateList;
     22 import android.content.res.Configuration;
     23 import android.content.res.Resources;
     24 import android.graphics.drawable.TransitionDrawable;
     25 import android.os.UserHandle;
     26 import android.util.AttributeSet;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 
     30 import com.android.launcher.R;
     31 
     32 public class InfoDropTarget extends ButtonDropTarget {
     33 
     34     private ColorStateList mOriginalTextColor;
     35     private TransitionDrawable mDrawable;
     36 
     37     public InfoDropTarget(Context context, AttributeSet attrs) {
     38         this(context, attrs, 0);
     39     }
     40 
     41     public InfoDropTarget(Context context, AttributeSet attrs, int defStyle) {
     42         super(context, attrs, defStyle);
     43     }
     44 
     45     @Override
     46     protected void onFinishInflate() {
     47         super.onFinishInflate();
     48 
     49         mOriginalTextColor = getTextColors();
     50 
     51         // Get the hover color
     52         Resources r = getResources();
     53         mHoverColor = r.getColor(R.color.info_target_hover_tint);
     54         mDrawable = (TransitionDrawable) getCurrentDrawable();
     55         if (null != mDrawable) {
     56             mDrawable.setCrossFadeEnabled(true);
     57         }
     58 
     59         // Remove the text in the Phone UI in landscape
     60         int orientation = getResources().getConfiguration().orientation;
     61         if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
     62             if (!LauncherApplication.isScreenLarge()) {
     63                 setText("");
     64             }
     65         }
     66     }
     67 
     68     private boolean isFromAllApps(DragSource source) {
     69         return (source instanceof AppsCustomizePagedView);
     70     }
     71 
     72     @Override
     73     public boolean acceptDrop(DragObject d) {
     74         // acceptDrop is called just before onDrop. We do the work here, rather than
     75         // in onDrop, because it allows us to reject the drop (by returning false)
     76         // so that the object being dragged isn't removed from the drag source.
     77         ComponentName componentName = null;
     78         if (d.dragInfo instanceof ApplicationInfo) {
     79             componentName = ((ApplicationInfo) d.dragInfo).componentName;
     80         } else if (d.dragInfo instanceof ShortcutInfo) {
     81             componentName = ((ShortcutInfo) d.dragInfo).intent.getComponent();
     82         } else if (d.dragInfo instanceof PendingAddItemInfo) {
     83             componentName = ((PendingAddItemInfo) d.dragInfo).componentName;
     84         }
     85         final UserHandle user;
     86         if (d.dragInfo instanceof ItemInfo) {
     87             user = ((ItemInfo) d.dragInfo).user;
     88         } else {
     89             user = android.os.Process.myUserHandle();
     90         }
     91         if (componentName != null) {
     92             mLauncher.startApplicationDetailsActivity(componentName, user);
     93         }
     94 
     95         // There is no post-drop animation, so clean up the DragView now
     96         d.deferDragViewCleanupPostAnimation = false;
     97         return false;
     98     }
     99 
    100     @Override
    101     public void onDragStart(DragSource source, Object info, int dragAction) {
    102         boolean isVisible = true;
    103 
    104         // Hide this button unless we are dragging something from AllApps
    105         if (!isFromAllApps(source)) {
    106             isVisible = false;
    107         }
    108 
    109         mActive = isVisible;
    110         mDrawable.resetTransition();
    111         setTextColor(mOriginalTextColor);
    112         ((ViewGroup) getParent()).setVisibility(isVisible ? View.VISIBLE : View.GONE);
    113     }
    114 
    115     @Override
    116     public void onDragEnd() {
    117         super.onDragEnd();
    118         mActive = false;
    119     }
    120 
    121     public void onDragEnter(DragObject d) {
    122         super.onDragEnter(d);
    123 
    124         mDrawable.startTransition(mTransitionDuration);
    125         setTextColor(mHoverColor);
    126     }
    127 
    128     public void onDragExit(DragObject d) {
    129         super.onDragExit(d);
    130 
    131         if (!d.dragComplete) {
    132             mDrawable.resetTransition();
    133             setTextColor(mOriginalTextColor);
    134         }
    135     }
    136 }
    137