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.musicfx; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.util.Log; 22 import android.view.View; 23 import android.view.ViewGroup; 24 25 26 /* 27 * This ViewGroup contains a single view, which will be rotated by 90 degrees counterclockwise. 28 */ 29 30 public class SeekBarRotator extends ViewGroup { 31 32 SeekBarRotator(Context context)33 public SeekBarRotator(Context context) { 34 super(context); 35 } 36 SeekBarRotator(Context context, AttributeSet attrs)37 public SeekBarRotator(Context context, AttributeSet attrs) { 38 super(context, attrs); 39 } 40 SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr)41 public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr) { 42 super(context, attrs, defStyleAttr); 43 } 44 SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)45 public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr, 46 int defStyleRes) { 47 super(context, attrs, defStyleAttr, defStyleRes); 48 } 49 50 @Override onMeasure(int widthMeasureSpec, int heightMeasureSpec)51 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 52 final View child = getChildAt(0); 53 54 if (child.getVisibility() != GONE) { 55 // swap width and height for child 56 measureChild(child, heightMeasureSpec, widthMeasureSpec); 57 setMeasuredDimension( 58 child.getMeasuredHeightAndState(), 59 child.getMeasuredWidthAndState()); 60 } else { 61 setMeasuredDimension( 62 resolveSizeAndState(0, widthMeasureSpec, 0), 63 resolveSizeAndState(0, heightMeasureSpec, 0)); 64 } 65 } 66 67 @Override onLayout(boolean changed, int l, int t, int r, int b)68 protected void onLayout(boolean changed, int l, int t, int r, int b) { 69 final View child = getChildAt(0); 70 71 if (child.getVisibility() != GONE) { 72 // rotate the child 90 degrees counterclockwise around its upper-left 73 child.setPivotX(0); 74 child.setPivotY(0); 75 child.setRotation(-90); 76 77 // place the child below this view, so it rotates into view 78 int mywidth = r - l; 79 int myheight = b - t; 80 int childwidth = myheight; 81 int childheight = mywidth; 82 83 child.layout(0, myheight, childwidth, myheight + childheight); 84 } 85 } 86 87 } 88