1 /* 2 * Copyright (C) 2014 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 androidx.appcompat.widget; 18 19 import android.content.Context; 20 import android.os.Build; 21 import android.util.AttributeSet; 22 import android.view.View; 23 import android.widget.PopupWindow; 24 25 import androidx.annotation.AttrRes; 26 import androidx.annotation.NonNull; 27 import androidx.annotation.Nullable; 28 import androidx.annotation.StyleRes; 29 import androidx.appcompat.R; 30 import androidx.core.widget.PopupWindowCompat; 31 32 class AppCompatPopupWindow extends PopupWindow { 33 34 private static final boolean COMPAT_OVERLAP_ANCHOR = Build.VERSION.SDK_INT < 21; 35 36 private boolean mOverlapAnchor; 37 38 public AppCompatPopupWindow(@NonNull Context context, @Nullable AttributeSet attrs, 39 @AttrRes int defStyleAttr) { 40 super(context, attrs, defStyleAttr); 41 init(context, attrs, defStyleAttr, 0); 42 } 43 44 public AppCompatPopupWindow(@NonNull Context context, @Nullable AttributeSet attrs, 45 @AttrRes int defStyleAttr, @StyleRes int defStyleRes) { 46 super(context, attrs, defStyleAttr, defStyleRes); 47 init(context, attrs, defStyleAttr, defStyleRes); 48 } 49 50 private void init(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 51 TintTypedArray a = TintTypedArray.obtainStyledAttributes(context, attrs, 52 R.styleable.PopupWindow, defStyleAttr, defStyleRes); 53 if (a.hasValue(R.styleable.PopupWindow_overlapAnchor)) { 54 setSupportOverlapAnchor(a.getBoolean(R.styleable.PopupWindow_overlapAnchor, false)); 55 } 56 // We re-set this for tinting purposes 57 setBackgroundDrawable(a.getDrawable(R.styleable.PopupWindow_android_popupBackground)); 58 59 a.recycle(); 60 } 61 62 @Override 63 public void showAsDropDown(View anchor, int xoff, int yoff) { 64 if (COMPAT_OVERLAP_ANCHOR && mOverlapAnchor) { 65 // If we're pre-L, emulate overlapAnchor by modifying the yOff 66 yoff -= anchor.getHeight(); 67 } 68 super.showAsDropDown(anchor, xoff, yoff); 69 } 70 71 @Override 72 public void showAsDropDown(View anchor, int xoff, int yoff, int gravity) { 73 if (COMPAT_OVERLAP_ANCHOR && mOverlapAnchor) { 74 // If we're pre-L, emulate overlapAnchor by modifying the yOff 75 yoff -= anchor.getHeight(); 76 } 77 super.showAsDropDown(anchor, xoff, yoff, gravity); 78 } 79 80 @Override 81 public void update(View anchor, int xoff, int yoff, int width, int height) { 82 if (COMPAT_OVERLAP_ANCHOR && mOverlapAnchor) { 83 // If we're pre-L, emulate overlapAnchor by modifying the yOff 84 yoff -= anchor.getHeight(); 85 } 86 super.update(anchor, xoff, yoff, width, height); 87 } 88 89 private void setSupportOverlapAnchor(boolean overlapAnchor) { 90 if (COMPAT_OVERLAP_ANCHOR) { 91 mOverlapAnchor = overlapAnchor; 92 } else { 93 PopupWindowCompat.setOverlapAnchor(this, overlapAnchor); 94 } 95 } 96 } 97
