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      1 /*
      2  * Copyright (C) 2010 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.email.activity;
     18 
     19 import com.android.email.R;
     20 import com.android.emailcommon.provider.Account;
     21 import com.android.emailcommon.provider.Mailbox;
     22 
     23 import android.content.Context;
     24 import android.content.res.Resources;
     25 import android.graphics.drawable.Drawable;
     26 import android.util.AttributeSet;
     27 import android.widget.RelativeLayout;
     28 import android.widget.TextView;
     29 
     30 public class MailboxListItem extends RelativeLayout {
     31     // Colors used for drop targets
     32     private static Integer sDropAvailableBgColor;
     33     private static Integer sDropTrashBgColor;
     34 
     35     /**
     36      * Owner account ID for the mailbox, {@link Account#ACCOUNT_ID_COMBINED_VIEW} for a combined
     37      * mailbox, or the ID for the current account, if it's an account row.
     38      */
     39     public long mAccountId;
     40 
     41     /**
     42      * ID for the current mailbox, or {@link Mailbox#NO_MAILBOX} if it's an account row.
     43      */
     44     public long mMailboxId;
     45     public Integer mMailboxType;
     46     /** If {@code true} this item can be used as a drop target. Otherwise, drop is prohibited. */
     47     public boolean mIsValidDropTarget;
     48     /** If {@code true} this item can be navigated to. Otherwise, it can just be selected. */
     49     public boolean mIsNavigable;
     50     public MailboxFragmentAdapter mAdapter;
     51 
     52     private Drawable mBackground;
     53     private TextView mLabelName;
     54     private TextView mLabelCount;
     55 
     56     /**
     57      * Drawable for an active item for D&D.  Note the drawable has state, so we can't share it
     58      * between items.
     59      * DO NOT use this directly; use {@link #getDropActiveBgDrawable()} instead, as it's lazily-
     60      * initialized.
     61      */
     62     private Drawable mDropActiveBgDrawable;
     63 
     64     public MailboxListItem(Context context) {
     65         super(context);
     66     }
     67 
     68     public MailboxListItem(Context context, AttributeSet attrs) {
     69         super(context, attrs);
     70     }
     71 
     72     public MailboxListItem(Context context, AttributeSet attrs, int defStyle) {
     73         super(context, attrs, defStyle);
     74     }
     75 
     76     @Override
     77     protected void onFinishInflate() {
     78         super.onFinishInflate();
     79         mBackground = getBackground();
     80         if (sDropAvailableBgColor == null) {
     81             Resources res = getResources();
     82             sDropAvailableBgColor = res.getColor(R.color.mailbox_drop_available_bg_color);
     83             sDropTrashBgColor = res.getColor(R.color.mailbox_drop_destructive_bg_color);
     84         }
     85         mLabelName = (TextView)findViewById(R.id.mailbox_name);
     86         mLabelCount = (TextView)findViewById(R.id.message_count);
     87     }
     88 
     89     /**
     90      * Whether or not this mailbox item is a drop target. Only valid mailboxes or those
     91      * not forbidden by the system (see {@link Mailbox#INVALID_DROP_TARGETS}) will return
     92      * {@code true}.
     93      */
     94     public boolean isDropTarget(long itemMailboxId) {
     95         return mIsValidDropTarget && (itemMailboxId != mMailboxId);
     96     }
     97 
     98     /**
     99      * Returns whether or not this item can be navigated to.
    100      */
    101     public boolean isNavigable() {
    102         return mIsNavigable;
    103     }
    104 
    105     private Drawable getDropActiveBgDrawable() {
    106         if (mDropActiveBgDrawable == null) {
    107             mDropActiveBgDrawable =
    108                 getContext().getResources().getDrawable(R.drawable.list_activated_holo);
    109         }
    110         return mDropActiveBgDrawable;
    111     }
    112 
    113     @Override
    114     public void setBackgroundDrawable(Drawable d) {
    115         // Don't override with the same instance.
    116         // If we don't do the check, something bad will happen to the fade-out animation for
    117         // the selected to non-selected transition.  (Looks like if you re-set the same
    118         // StateListDrawable instance, it'll get confused.)
    119         if (d != getBackground()) {
    120             super.setBackgroundDrawable(d);
    121         }
    122     }
    123 
    124     /**
    125      * Set the "trash" drop target background.
    126      */
    127     public void setDropTrashBackground() {
    128         setBackgroundColor(sDropTrashBgColor);
    129     }
    130 
    131     /**
    132      * Set the "active" drop target background.  (Used for the items that the user is hovering over)
    133      */
    134     public void setDropActiveBackground() {
    135         setBackgroundDrawable(getDropActiveBgDrawable());
    136     }
    137 
    138     public void setDropTargetBackground(boolean dragInProgress, long itemMailbox) {
    139         boolean isBackgroundSet = false;
    140         if (dragInProgress) {
    141             if (isDropTarget(itemMailbox)) {
    142                 setBackgroundColor(sDropAvailableBgColor);
    143                 isBackgroundSet = true;
    144             } else {
    145                 mLabelName.setEnabled(false);
    146                 mLabelCount.setEnabled(false);
    147             }
    148         } else {
    149             mLabelName.setEnabled(true);
    150             mLabelCount.setEnabled(true);
    151         }
    152         if (!isBackgroundSet) {
    153             // Drag not in progress, or it's not a drop target.
    154             setBackgroundDrawable(mBackground);
    155         }
    156     }
    157 }
    158