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 17 package com.android.gallery3d.filtershow; 18 19 import android.content.Context; 20 import android.content.res.Resources; 21 import android.content.res.TypedArray; 22 import android.util.AttributeSet; 23 import android.util.TypedValue; 24 import android.widget.LinearLayout; 25 26 import com.android.gallery3d.R; 27 28 public class CenteredLinearLayout extends LinearLayout { 29 private final int mMaxWidth; 30 31 public CenteredLinearLayout(Context context, AttributeSet attrs) { 32 super(context, attrs); 33 TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.CenteredLinearLayout); 34 mMaxWidth = a.getDimensionPixelSize(R.styleable.CenteredLinearLayout_max_width, 0); 35 } 36 37 @Override 38 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 39 int parentWidth = MeasureSpec.getSize(widthMeasureSpec); 40 int parentHeight = MeasureSpec.getSize(heightMeasureSpec); 41 Resources r = getContext().getResources(); 42 float value = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, parentWidth, 43 r.getDisplayMetrics()); 44 if (mMaxWidth > 0 && parentWidth > mMaxWidth) { 45 int measureMode = MeasureSpec.getMode(widthMeasureSpec); 46 widthMeasureSpec = MeasureSpec.makeMeasureSpec(mMaxWidth, measureMode); 47 } 48 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 49 } 50 51 } 52
