1 /* 2 * Copyright (C) 2016 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.documentsui; 18 19 import com.android.documentsui.DragAndDropManager.State; 20 21 import android.content.Context; 22 import android.graphics.drawable.Drawable; 23 import android.graphics.drawable.LayerDrawable; 24 import android.util.AttributeSet; 25 import android.view.Gravity; 26 import android.widget.ImageView; 27 28 /** 29 * Provides a way to encapsulate droppable badge toggling logic into a single class. 30 */ 31 public final class DropBadgeView extends ImageView { 32 private static final int[] STATE_REJECT_DROP = { R.attr.state_reject_drop }; 33 private static final int[] STATE_COPY = { R.attr.state_copy }; 34 35 private @State int mState; 36 private LayerDrawable mBackground; 37 DropBadgeView(Context context, AttributeSet attrs)38 public DropBadgeView(Context context, AttributeSet attrs) { 39 super(context, attrs); 40 41 final int badgeHeight = context.getResources() 42 .getDimensionPixelSize(R.dimen.drop_icon_height); 43 final int badgeWidth = context.getResources() 44 .getDimensionPixelSize(R.dimen.drop_icon_width); 45 final int iconSize = context.getResources().getDimensionPixelSize(R.dimen.root_icon_size); 46 47 Drawable okBadge = context.getResources().getDrawable(R.drawable.drop_badge_states, null); 48 Drawable defaultIcon = context.getResources() 49 .getDrawable(R.drawable.ic_doc_generic, null); 50 51 Drawable[] list = {defaultIcon, okBadge}; 52 mBackground = new LayerDrawable(list); 53 54 mBackground.setLayerGravity(1, Gravity.BOTTOM | Gravity.RIGHT); 55 mBackground.setLayerGravity(0, Gravity.TOP | Gravity.LEFT); 56 mBackground.setLayerSize(1, badgeWidth, badgeHeight); 57 mBackground.setLayerSize(0, iconSize, iconSize); 58 59 setBackground(mBackground); 60 } 61 62 @Override onCreateDrawableState(int extraSpace)63 public int[] onCreateDrawableState(int extraSpace) { 64 // STATE_REJECT_DROP and STATE_COPY can't exist at the same time. 65 final int[] drawableState = super.onCreateDrawableState(extraSpace + 1); 66 67 switch (mState) { 68 case DragAndDropManager.STATE_NOT_ALLOWED: 69 mergeDrawableStates(drawableState, STATE_REJECT_DROP); 70 break; 71 case DragAndDropManager.STATE_COPY: 72 mergeDrawableStates(drawableState, STATE_COPY); 73 break; 74 } 75 76 return drawableState; 77 } 78 updateState(@tate int state)79 void updateState(@State int state) { 80 mState = state; 81 refreshDrawableState(); 82 } 83 updateIcon(Drawable icon)84 void updateIcon(Drawable icon) { 85 mBackground.setDrawable(0, icon); 86 } 87 }