2da78450d5
- Add FillContentLayout, which is a (frame)layout which, when set to fill the remaining space of its parent, will make sure its children are sized between minWidth/minHeight and maxWidth/maxHeight. - Renamed styleable SuwIntrinsicSizeFrameLayout to be consistent with the name of the view that uses it. Test: ./gradlew connectedAndroidTest test Bug: 38210310 Change-Id: I5b2aa6cfe8b4a05843de25d39cae776609f3d161
93 lines
3.7 KiB
Java
93 lines
3.7 KiB
Java
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.setupwizardlib.view;
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import android.annotation.TargetApi;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.os.Build.VERSION_CODES;
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import android.util.AttributeSet;
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import android.widget.FrameLayout;
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import com.android.setupwizardlib.R;
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/**
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* A FrameLayout subclass that has an "intrinsic size", which is the size it wants to be if that is
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* within the constraints given by the parent. The intrinsic size can be set with the
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* {@code android:width} and {@code android:height} attributes in XML.
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*
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* Note that for the intrinsic size to be meaningful, {@code android:layout_width} and/or
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* {@code android:layout_height} will need to be {@code wrap_content}.
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*/
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public class IntrinsicSizeFrameLayout extends FrameLayout {
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private int mIntrinsicHeight = 0;
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private int mIntrinsicWidth = 0;
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public IntrinsicSizeFrameLayout(Context context) {
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super(context);
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init(context, null, 0);
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}
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public IntrinsicSizeFrameLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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init(context, attrs, 0);
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}
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@TargetApi(VERSION_CODES.HONEYCOMB)
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public IntrinsicSizeFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context, attrs, defStyleAttr);
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}
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private void init(Context context, AttributeSet attrs, int defStyleAttr) {
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final TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.SuwIntrinsicSizeFrameLayout, defStyleAttr, 0);
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mIntrinsicHeight =
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a.getDimensionPixelSize(R.styleable.SuwIntrinsicSizeFrameLayout_android_height, 0);
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mIntrinsicWidth =
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a.getDimensionPixelSize(R.styleable.SuwIntrinsicSizeFrameLayout_android_width, 0);
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a.recycle();
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(getIntrinsicMeasureSpec(widthMeasureSpec, mIntrinsicWidth),
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getIntrinsicMeasureSpec(heightMeasureSpec, mIntrinsicHeight));
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}
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private int getIntrinsicMeasureSpec(int measureSpec, int intrinsicSize) {
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if (intrinsicSize <= 0) {
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// Intrinsic size is not set, just return the original spec
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return measureSpec;
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}
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final int mode = MeasureSpec.getMode(measureSpec);
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final int size = MeasureSpec.getSize(measureSpec);
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if (mode == MeasureSpec.UNSPECIFIED) {
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// Parent did not give any constraint, so we'll be the intrinsic size
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return MeasureSpec.makeMeasureSpec(mIntrinsicHeight, MeasureSpec.EXACTLY);
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} else if (mode == MeasureSpec.AT_MOST) {
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// If intrinsic size is within parents constraint, take the intrinsic size.
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// Otherwise take the parents size because that's closest to the intrinsic size.
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return MeasureSpec.makeMeasureSpec(Math.min(size, mIntrinsicHeight),
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MeasureSpec.EXACTLY);
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}
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// Parent specified EXACTLY, or in all other cases, just return the original spec
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return measureSpec;
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}
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}
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