NotificationPanelView.java revision f0b06c773867610d747d2063e74f13c12e3595c4
1/* 2 * Copyright (C) 2012 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 17package com.android.systemui.statusbar.phone; 18 19import android.content.Context; 20import android.util.AttributeSet; 21import android.view.MotionEvent; 22import android.view.View; 23import android.view.accessibility.AccessibilityEvent; 24 25import com.android.systemui.R; 26import com.android.systemui.statusbar.GestureRecorder; 27import com.android.systemui.statusbar.stack.NotificationStackScrollLayout; 28 29public class NotificationPanelView extends PanelView { 30 public static final boolean DEBUG_GESTURES = true; 31 32 PhoneStatusBar mStatusBar; 33 private View mHeader; 34 private View mKeyguardStatusView; 35 36 private NotificationStackScrollLayout mNotificationStackScroller; 37 private int[] mTempLocation = new int[2]; 38 private int[] mTempChildLocation = new int[2]; 39 private View mNotificationParent; 40 private boolean mTrackingSettings; 41 private float mExpandedHeight = -1; 42 43 public NotificationPanelView(Context context, AttributeSet attrs) { 44 super(context, attrs); 45 } 46 47 public void setStatusBar(PhoneStatusBar bar) { 48 if (mStatusBar != null) { 49 mStatusBar.setOnFlipRunnable(null); 50 } 51 mStatusBar = bar; 52 if (bar != null) { 53 mStatusBar.setOnFlipRunnable(new Runnable() { 54 @Override 55 public void run() { 56 requestPanelHeightUpdate(); 57 } 58 }); 59 } 60 } 61 62 @Override 63 protected void onFinishInflate() { 64 super.onFinishInflate(); 65 66 mHeader = findViewById(R.id.header); 67 mKeyguardStatusView = findViewById(R.id.keyguard_status_view); 68 mNotificationStackScroller = (NotificationStackScrollLayout) 69 findViewById(R.id.notification_stack_scroller); 70 mNotificationParent = findViewById(R.id.notification_container_parent); 71 } 72 73 @Override 74 public void fling(float vel, boolean always) { 75 GestureRecorder gr = ((PhoneStatusBarView) mBar).mBar.getGestureRecorder(); 76 if (gr != null) { 77 gr.tag( 78 "fling " + ((vel > 0) ? "open" : "closed"), 79 "notifications,v=" + vel); 80 } 81 super.fling(vel, always); 82 } 83 84 @Override 85 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 86 if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) { 87 event.getText() 88 .add(getContext().getString(R.string.accessibility_desc_notification_shade)); 89 return true; 90 } 91 92 return super.dispatchPopulateAccessibilityEvent(event); 93 } 94 95 /** 96 * Gets the relative position of a view on the screen in regard to this view. 97 * 98 * @param requestedView the view we want to find the relative position for 99 * @return 100 */ 101 private int getRelativeTop(View requestedView) { 102 getLocationOnScreen(mTempLocation); 103 requestedView.getLocationOnScreen(mTempChildLocation); 104 return mTempChildLocation[1] - mTempLocation[1]; 105 } 106 107 @Override 108 public boolean onInterceptTouchEvent(MotionEvent event) { 109 // intercept for quick settings 110 if (event.getAction() == MotionEvent.ACTION_DOWN) { 111 final View target = mStatusBar.isOnKeyguard() ? mKeyguardStatusView : mHeader; 112 final boolean inTarget = PhoneStatusBar.inBounds(target, event, true); 113 if (inTarget && !isInSettings()) { 114 mTrackingSettings = true; 115 return true; 116 } 117 if (!inTarget && isInSettings()) { 118 mTrackingSettings = true; 119 return true; 120 } 121 } 122 return super.onInterceptTouchEvent(event); 123 } 124 125 @Override 126 public boolean onTouchEvent(MotionEvent event) { 127 // TODO: Handle doublefinger swipe to notifications again. Look at history for a reference 128 // implementation. 129 if (mTrackingSettings) { 130 mStatusBar.onSettingsEvent(event); 131 if (event.getAction() == MotionEvent.ACTION_UP 132 || event.getAction() == MotionEvent.ACTION_CANCEL) { 133 mTrackingSettings = false; 134 } 135 return true; 136 } 137 if (isInSettings()) { 138 return true; 139 } 140 return super.onTouchEvent(event); 141 } 142 143 @Override 144 protected boolean isScrolledToBottom() { 145 if (!isInSettings()) { 146 return mNotificationStackScroller.isScrolledToBottom(); 147 } 148 return super.isScrolledToBottom(); 149 } 150 151 @Override 152 protected int getMaxPanelHeight() { 153 if (!isInSettings()) { 154 int maxPanelHeight = super.getMaxPanelHeight(); 155 int emptyBottomMargin = mNotificationStackScroller.getEmptyBottomMargin(); 156 return maxPanelHeight - emptyBottomMargin; 157 } 158 return super.getMaxPanelHeight(); 159 } 160 161 private boolean isInSettings() { 162 return mStatusBar != null && mStatusBar.isFlippedToSettings(); 163 } 164 165 @Override 166 protected void onHeightUpdated(float expandedHeight) { 167 updateNotificationStackHeight(expandedHeight); 168 } 169 170 /** 171 * Update the height of the {@link #mNotificationStackScroller} to the new expanded height. 172 * This is much more efficient than doing it over the layout pass. 173 * 174 * @param expandedHeight the new expanded height 175 */ 176 private void updateNotificationStackHeight(float expandedHeight) { 177 if (mExpandedHeight == expandedHeight) return; 178 mExpandedHeight = expandedHeight; 179 mNotificationStackScroller.setIsExpanded(expandedHeight > 0.0f); 180 float childOffset = getRelativeTop(mNotificationStackScroller) 181 - mNotificationParent.getTranslationY(); 182 int newStackHeight = (int) (expandedHeight - childOffset); 183 int itemHeight = mNotificationStackScroller.getItemHeight(); 184 int bottomStackPeekSize = mNotificationStackScroller.getBottomStackPeekSize(); 185 int minStackHeight = itemHeight + bottomStackPeekSize; 186 if (newStackHeight >= minStackHeight) { 187 mNotificationParent.setTranslationY(0); 188 mNotificationStackScroller.setCurrentStackHeight(newStackHeight); 189 } else { 190 191 // We did not reach the position yet where we actually start growing, 192 // so we translate the stack upwards. 193 int translationY = (newStackHeight - minStackHeight); 194 // A slight parallax effect is introduced in order for the stack to catch up with 195 // the top card. 196 float partiallyThere = (float) newStackHeight / minStackHeight; 197 partiallyThere = Math.max(0, partiallyThere); 198 translationY += (1 - partiallyThere) * bottomStackPeekSize; 199 mNotificationParent.setTranslationY(translationY); 200 mNotificationStackScroller.setCurrentStackHeight( 201 (int) (expandedHeight - (childOffset + translationY))); 202 } 203 } 204 205 @Override 206 protected int getDesiredMeasureHeight() { 207 return mMaxPanelHeight; 208 } 209 210 @Override 211 protected void onExpandingStarted() { 212 super.onExpandingStarted(); 213 mNotificationStackScroller.onExpansionStarted(); 214 } 215 216 @Override 217 protected void onExpandingFinished() { 218 super.onExpandingFinished(); 219 mNotificationStackScroller.onExpansionStopped(); 220 } 221} 222