116 lines
3.8 KiB
Java
116 lines
3.8 KiB
Java
/*
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* Copyright (C) 2011 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.email.view;
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import com.android.email.R;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.util.AttributeSet;
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import android.widget.FrameLayout;
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/**
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* A {@link FrameLayout} with the max width/height.
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*/
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public class SizeBoundingFrameLayout extends FrameLayout {
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public static final int DIMENSION_DEFAULT = -1; // unspecified
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private int mMaxWidth = DIMENSION_DEFAULT;
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private int mMaxHeight = DIMENSION_DEFAULT;
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public SizeBoundingFrameLayout(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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initFromAttributeSet(context, attrs);
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}
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public SizeBoundingFrameLayout(Context context, AttributeSet attrs) {
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super(context, attrs);
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initFromAttributeSet(context, attrs);
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}
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public SizeBoundingFrameLayout(Context context) {
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super(context);
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}
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private void initFromAttributeSet(Context c, AttributeSet attrs) {
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TypedArray a = c.obtainStyledAttributes(attrs,
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R.styleable.SizeBoundingFrameLayout_attributes);
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mMaxWidth = a.getDimensionPixelSize(
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R.styleable.SizeBoundingFrameLayout_attributes_maxWidth, DIMENSION_DEFAULT);
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mMaxHeight = a.getDimensionPixelSize(
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R.styleable.SizeBoundingFrameLayout_attributes_maxHeight, DIMENSION_DEFAULT);
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a.recycle();
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}
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/** Set the max width. Use {@link #DIMENSION_DEFAULT} for unspecified. */
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public void setMaxWidth(int maxWidth) {
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mMaxWidth = maxWidth;
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requestLayout();
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invalidate();
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}
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public int getMaxWidth() {
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return mMaxWidth;
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}
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/** Set the max height. Use {@link #DIMENSION_DEFAULT} for unspecified. */
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public void setMaxHeight(int maxHeight) {
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mMaxHeight = maxHeight;
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requestLayout();
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invalidate();
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}
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public int getMaxHeight() {
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return mMaxHeight;
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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int widthMode = MeasureSpec.getMode(widthMeasureSpec);
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int heightMode = MeasureSpec.getMode(heightMeasureSpec);
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int widthSize = MeasureSpec.getSize(widthMeasureSpec);
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int heightSize = MeasureSpec.getSize(heightMeasureSpec);
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// Limit the size, unless MeasureSpec.EXACTLY
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if (mMaxWidth >= 0) {
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switch (widthMode) {
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case MeasureSpec.AT_MOST:
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widthSize = Math.min(widthSize, mMaxWidth);
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break;
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case MeasureSpec.UNSPECIFIED:
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widthMode = MeasureSpec.AT_MOST;
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widthSize = mMaxWidth;
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break;
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}
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}
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if (mMaxHeight >= 0) {
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switch (heightMode) {
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case MeasureSpec.AT_MOST:
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heightSize = Math.min(heightSize, mMaxHeight);
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break;
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case MeasureSpec.UNSPECIFIED:
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heightMode = MeasureSpec.AT_MOST;
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heightSize = mMaxHeight;
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break;
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}
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}
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super.onMeasure(MeasureSpec.makeMeasureSpec(widthSize, widthMode),
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MeasureSpec.makeMeasureSpec(heightSize, heightMode));
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}
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}
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