1 /* 2 * Copyright (C) 2017 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 package com.android.launcher3.allapps; 17 18 import android.content.Context; 19 import android.content.SharedPreferences; 20 import android.graphics.Canvas; 21 import android.graphics.Paint; 22 import android.support.annotation.NonNull; 23 import android.support.annotation.Nullable; 24 import android.util.AttributeSet; 25 import android.view.View; 26 import android.widget.Button; 27 import android.widget.LinearLayout; 28 29 import com.android.launcher3.Launcher; 30 import com.android.launcher3.R; 31 import com.android.launcher3.Utilities; 32 import com.android.launcher3.pageindicators.PageIndicator; 33 import com.android.launcher3.util.Themes; 34 35 /** 36 * Supports two indicator colors, dedicated for personal and work tabs. 37 */ 38 public class PersonalWorkSlidingTabStrip extends LinearLayout implements PageIndicator { 39 private static final int POSITION_PERSONAL = 0; 40 private static final int POSITION_WORK = 1; 41 42 private static final String KEY_SHOWED_PEEK_WORK_TAB = "showed_peek_work_tab"; 43 44 private final Paint mSelectedIndicatorPaint; 45 private final Paint mDividerPaint; 46 private final SharedPreferences mSharedPreferences; 47 48 private int mSelectedIndicatorHeight; 49 private int mIndicatorLeft = -1; 50 private int mIndicatorRight = -1; 51 private float mScrollOffset; 52 private int mSelectedPosition = 0; 53 54 private AllAppsContainerView mContainerView; 55 private int mLastActivePage = 0; 56 private boolean mIsRtl; 57 PersonalWorkSlidingTabStrip(@onNull Context context, @Nullable AttributeSet attrs)58 public PersonalWorkSlidingTabStrip(@NonNull Context context, @Nullable AttributeSet attrs) { 59 super(context, attrs); 60 setOrientation(HORIZONTAL); 61 setWillNotDraw(false); 62 63 mSelectedIndicatorHeight = 64 getResources().getDimensionPixelSize(R.dimen.all_apps_tabs_indicator_height); 65 66 mSelectedIndicatorPaint = new Paint(); 67 mSelectedIndicatorPaint.setColor( 68 Themes.getAttrColor(context, android.R.attr.colorAccent)); 69 70 mDividerPaint = new Paint(); 71 mDividerPaint.setColor(Themes.getAttrColor(context, android.R.attr.colorControlHighlight)); 72 mDividerPaint.setStrokeWidth( 73 getResources().getDimensionPixelSize(R.dimen.all_apps_divider_height)); 74 75 mSharedPreferences = Launcher.getLauncher(getContext()).getSharedPrefs(); 76 mIsRtl = Utilities.isRtl(getResources()); 77 } 78 updateIndicatorPosition(float scrollOffset)79 private void updateIndicatorPosition(float scrollOffset) { 80 mScrollOffset = scrollOffset; 81 updateIndicatorPosition(); 82 } 83 updateTabTextColor(int pos)84 private void updateTabTextColor(int pos) { 85 mSelectedPosition = pos; 86 for (int i = 0; i < getChildCount(); i++) { 87 Button tab = (Button) getChildAt(i); 88 tab.setSelected(i == pos); 89 } 90 } 91 92 @Override onLayout(boolean changed, int l, int t, int r, int b)93 protected void onLayout(boolean changed, int l, int t, int r, int b) { 94 super.onLayout(changed, l, t, r, b); 95 updateTabTextColor(mSelectedPosition); 96 updateIndicatorPosition(mScrollOffset); 97 } 98 updateIndicatorPosition()99 private void updateIndicatorPosition() { 100 int left = -1, right = -1; 101 final View leftTab = getLeftTab(); 102 if (leftTab != null) { 103 left = (int) (leftTab.getLeft() + leftTab.getWidth() * mScrollOffset); 104 right = left + leftTab.getWidth(); 105 } 106 setIndicatorPosition(left, right); 107 } 108 getLeftTab()109 private View getLeftTab() { 110 return mIsRtl ? getChildAt(1) : getChildAt(0); 111 } 112 setIndicatorPosition(int left, int right)113 private void setIndicatorPosition(int left, int right) { 114 if (left != mIndicatorLeft || right != mIndicatorRight) { 115 mIndicatorLeft = left; 116 mIndicatorRight = right; 117 invalidate(); 118 } 119 } 120 121 @Override onDraw(Canvas canvas)122 protected void onDraw(Canvas canvas) { 123 super.onDraw(canvas); 124 125 float y = getHeight() - mDividerPaint.getStrokeWidth(); 126 canvas.drawLine(getPaddingLeft(), y, getWidth() - getPaddingRight(), y, mDividerPaint); 127 canvas.drawRect(mIndicatorLeft, getHeight() - mSelectedIndicatorHeight, 128 mIndicatorRight, getHeight(), mSelectedIndicatorPaint); 129 } 130 highlightWorkTabIfNecessary()131 public void highlightWorkTabIfNecessary() { 132 if (mSharedPreferences.getBoolean(KEY_SHOWED_PEEK_WORK_TAB, false)) { 133 return; 134 } 135 if (mLastActivePage != POSITION_PERSONAL) { 136 return; 137 } 138 highlightWorkTab(); 139 mSharedPreferences.edit().putBoolean(KEY_SHOWED_PEEK_WORK_TAB, true).apply(); 140 } 141 highlightWorkTab()142 private void highlightWorkTab() { 143 View v = getChildAt(POSITION_WORK); 144 v.post(() -> { 145 v.setPressed(true); 146 v.setPressed(false); 147 }); 148 } 149 150 @Override setScroll(int currentScroll, int totalScroll)151 public void setScroll(int currentScroll, int totalScroll) { 152 float scrollOffset = ((float) currentScroll) / totalScroll; 153 updateIndicatorPosition(scrollOffset); 154 } 155 156 @Override setActiveMarker(int activePage)157 public void setActiveMarker(int activePage) { 158 updateTabTextColor(activePage); 159 if (mContainerView != null && mLastActivePage != activePage) { 160 mContainerView.onTabChanged(activePage); 161 } 162 mLastActivePage = activePage; 163 } 164 setContainerView(AllAppsContainerView containerView)165 public void setContainerView(AllAppsContainerView containerView) { 166 mContainerView = containerView; 167 } 168 169 @Override setMarkersCount(int numMarkers)170 public void setMarkersCount(int numMarkers) { } 171 172 @Override hasOverlappingRendering()173 public boolean hasOverlappingRendering() { 174 return false; 175 } 176 } 177