| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.widget; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.util.AttributeSet; |
| import android.util.DisplayMetrics; |
| import android.widget.LinearLayout; |
| |
| import static android.view.View.MeasureSpec.*; |
| import static com.android.internal.R.*; |
| |
| /** |
| * A special layout when measured in AT_MOST will take up a given percentage of |
| * the available space. |
| */ |
| public class WeightedLinearLayout extends LinearLayout { |
| private float mMajorWeightMin; |
| private float mMinorWeightMin; |
| private float mMajorWeightMax; |
| private float mMinorWeightMax; |
| |
| public WeightedLinearLayout(Context context) { |
| super(context); |
| } |
| |
| public WeightedLinearLayout(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| TypedArray a = |
| context.obtainStyledAttributes(attrs, styleable.WeightedLinearLayout); |
| |
| mMajorWeightMin = a.getFloat(styleable.WeightedLinearLayout_majorWeightMin, 0.0f); |
| mMinorWeightMin = a.getFloat(styleable.WeightedLinearLayout_minorWeightMin, 0.0f); |
| mMajorWeightMax = a.getFloat(styleable.WeightedLinearLayout_majorWeightMax, 0.0f); |
| mMinorWeightMax = a.getFloat(styleable.WeightedLinearLayout_minorWeightMax, 0.0f); |
| |
| a.recycle(); |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| final DisplayMetrics metrics = getContext().getResources().getDisplayMetrics(); |
| final int screenWidth = metrics.widthPixels; |
| final boolean isPortrait = screenWidth < metrics.heightPixels; |
| |
| final int widthMode = getMode(widthMeasureSpec); |
| |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| int width = getMeasuredWidth(); |
| boolean measure = false; |
| |
| widthMeasureSpec = MeasureSpec.makeMeasureSpec(width, EXACTLY); |
| |
| final float widthWeightMin = isPortrait ? mMinorWeightMin : mMajorWeightMin; |
| final float widthWeightMax = isPortrait ? mMinorWeightMax : mMajorWeightMax; |
| if (widthMode == AT_MOST) { |
| final int weightedMin = (int) (screenWidth * widthWeightMin); |
| final int weightedMax = (int) (screenWidth * widthWeightMin); |
| if (widthWeightMin > 0.0f && width < weightedMin) { |
| widthMeasureSpec = MeasureSpec.makeMeasureSpec(weightedMin, EXACTLY); |
| measure = true; |
| } else if (widthWeightMax > 0.0f && width > weightedMax) { |
| widthMeasureSpec = MeasureSpec.makeMeasureSpec(weightedMax, EXACTLY); |
| measure = true; |
| } |
| } |
| |
| // TODO: Support height? |
| |
| if (measure) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| } |
| } |
| } |