1 /* 2 * Copyright (C) 2015 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.annotation.SuppressLint; 20 import android.content.Context; 21 import android.content.res.TypedArray; 22 import android.graphics.PointF; 23 import android.graphics.Rect; 24 import android.graphics.drawable.ColorDrawable; 25 import android.graphics.drawable.Drawable; 26 import android.graphics.drawable.InsetDrawable; 27 import android.util.AttributeSet; 28 import android.view.MotionEvent; 29 import android.view.View; 30 import android.view.ViewConfiguration; 31 import android.widget.FrameLayout; 32 33 import com.android.launcher3.allapps.AllAppsContainerView; 34 import com.android.launcher3.config.FeatureFlags; 35 import com.android.launcher3.util.TransformingTouchDelegate; 36 37 /** 38 * A base container view, which supports resizing. 39 */ 40 public abstract class BaseContainerView extends FrameLayout 41 implements DeviceProfile.LauncherLayoutChangeListener { 42 43 private static final Rect sBgPaddingRect = new Rect(); 44 45 protected final Drawable mBaseDrawable; 46 47 private View mRevealView; 48 private View mContent; 49 50 private TransformingTouchDelegate mTouchDelegate; 51 52 private final PointF mLastTouchDownPosPx = new PointF(-1.0f, -1.0f); 53 54 public BaseContainerView(Context context) { 55 this(context, null); 56 } 57 58 public BaseContainerView(Context context, AttributeSet attrs) { 59 this(context, attrs, 0); 60 } 61 62 public BaseContainerView(Context context, AttributeSet attrs, int defStyleAttr) { 63 super(context, attrs, defStyleAttr); 64 65 if (FeatureFlags.LAUNCHER3_ALL_APPS_PULL_UP && this instanceof AllAppsContainerView) { 66 mBaseDrawable = new ColorDrawable(); 67 } else { 68 TypedArray a = context.obtainStyledAttributes(attrs, 69 R.styleable.BaseContainerView, defStyleAttr, 0); 70 mBaseDrawable = a.getDrawable(R.styleable.BaseContainerView_revealBackground); 71 a.recycle(); 72 } 73 } 74 75 @Override 76 protected void onAttachedToWindow() { 77 super.onAttachedToWindow(); 78 79 DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile(); 80 grid.addLauncherLayoutChangedListener(this); 81 82 View touchDelegateTargetView = getTouchDelegateTargetView(); 83 if (touchDelegateTargetView != null) { 84 mTouchDelegate = new TransformingTouchDelegate(touchDelegateTargetView); 85 ((View) touchDelegateTargetView.getParent()).setTouchDelegate(mTouchDelegate); 86 } 87 } 88 89 @Override 90 protected void onDetachedFromWindow() { 91 super.onDetachedFromWindow(); 92 93 DeviceProfile grid = Launcher.getLauncher(getContext()).getDeviceProfile(); 94 grid.removeLauncherLayoutChangedListener(this); 95 } 96 97 @Override 98 protected void onFinishInflate() { 99 super.onFinishInflate(); 100 101 mContent = findViewById(R.id.main_content); 102 mRevealView = findViewById(R.id.reveal_view); 103 104 updatePaddings(); 105 } 106 107 @Override 108 public void onLauncherLayoutChanged() { 109 updatePaddings(); 110 } 111 112 /** 113 * Calculate the background padding as it can change due to insets/content padding change. 114 */ 115 private void updatePaddings() { 116 Context context = getContext(); 117 int paddingLeft; 118 int paddingRight; 119 int paddingTop; 120 int paddingBottom; 121 122 DeviceProfile grid = Launcher.getLauncher(context).getDeviceProfile(); 123 int[] padding = grid.getContainerPadding(); 124 paddingLeft = padding[0] + grid.edgeMarginPx; 125 paddingRight = padding[1] + grid.edgeMarginPx; 126 if (!grid.isVerticalBarLayout()) { 127 paddingTop = paddingBottom = grid.edgeMarginPx; 128 } else { 129 paddingTop = paddingBottom = 0; 130 } 131 updateBackground(paddingLeft, paddingTop, paddingRight, paddingBottom); 132 } 133 134 /** 135 * Update the background for the reveal view and content view based on the background padding. 136 */ 137 protected void updateBackground(int paddingLeft, int paddingTop, 138 int paddingRight, int paddingBottom) { 139 mRevealView.setBackground(new InsetDrawable(mBaseDrawable, 140 paddingLeft, paddingTop, paddingRight, paddingBottom)); 141 mContent.setBackground(new InsetDrawable(mBaseDrawable, 142 paddingLeft, paddingTop, paddingRight, paddingBottom)); 143 } 144 145 @Override 146 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 147 super.onLayout(changed, left, top, right, bottom); 148 149 View touchDelegateTargetView = getTouchDelegateTargetView(); 150 if (touchDelegateTargetView != null) { 151 getRevealView().getBackground().getPadding(sBgPaddingRect); 152 mTouchDelegate.setBounds( 153 touchDelegateTargetView.getLeft() - sBgPaddingRect.left, 154 touchDelegateTargetView.getTop() - sBgPaddingRect.top, 155 touchDelegateTargetView.getRight() + sBgPaddingRect.right, 156 touchDelegateTargetView.getBottom() + sBgPaddingRect.bottom); 157 } 158 } 159 160 @Override 161 public boolean onInterceptTouchEvent(MotionEvent ev) { 162 return handleTouchEvent(ev); 163 } 164 165 @SuppressLint("ClickableViewAccessibility") 166 @Override 167 public boolean onTouchEvent(MotionEvent ev) { 168 return handleTouchEvent(ev); 169 } 170 171 public void setRevealDrawableColor(int color) { 172 ((ColorDrawable) mBaseDrawable).setColor(color); 173 } 174 175 public final View getContentView() { 176 return mContent; 177 } 178 179 public final View getRevealView() { 180 return mRevealView; 181 } 182 183 184 /** 185 * Handles the touch events that shows the workspace when clicking outside the bounds of the 186 * touch delegate target view. 187 */ 188 private boolean handleTouchEvent(MotionEvent ev) { 189 switch (ev.getAction()) { 190 case MotionEvent.ACTION_DOWN: 191 // Check if the touch is outside touch delegate target view 192 View touchDelegateTargetView = getTouchDelegateTargetView(); 193 float leftBoundPx = touchDelegateTargetView.getLeft(); 194 if (ev.getX() < leftBoundPx || 195 ev.getX() > (touchDelegateTargetView.getWidth() + leftBoundPx)) { 196 mLastTouchDownPosPx.set((int) ev.getX(), (int) ev.getY()); 197 } 198 break; 199 case MotionEvent.ACTION_UP: 200 if (mLastTouchDownPosPx.x > -1) { 201 ViewConfiguration viewConfig = ViewConfiguration.get(getContext()); 202 float dx = ev.getX() - mLastTouchDownPosPx.x; 203 float dy = ev.getY() - mLastTouchDownPosPx.y; 204 float distance = PointF.length(dx, dy); 205 if (distance < viewConfig.getScaledTouchSlop()) { 206 // The background was clicked, so just go home 207 Launcher.getLauncher(getContext()).showWorkspace(true); 208 return true; 209 } 210 } 211 // Fall through 212 case MotionEvent.ACTION_CANCEL: 213 mLastTouchDownPosPx.set(-1, -1); 214 break; 215 } 216 return false; 217 } 218 219 public abstract View getTouchDelegateTargetView(); 220 } 221