/*
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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"); you may not use this file
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* except in compliance with the License. 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 distributed under the
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* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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package com.android.systemui;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.ViewGroup.LayoutParams;
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public class ResizingSpace extends View {
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private final int mWidth;
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private final int mHeight;
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public ResizingSpace(Context context, AttributeSet attrs) {
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super(context, attrs);
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if (getVisibility() == VISIBLE) {
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setVisibility(INVISIBLE);
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}
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TypedArray a = context.obtainStyledAttributes(attrs, android.R.styleable.ViewGroup_Layout);
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mWidth = a.getResourceId(android.R.styleable.ViewGroup_Layout_layout_width, 0);
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mHeight = a.getResourceId(android.R.styleable.ViewGroup_Layout_layout_height, 0);
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}
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@Override
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protected void onConfigurationChanged(Configuration newConfig) {
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super.onConfigurationChanged(newConfig);
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LayoutParams params = getLayoutParams();
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boolean changed = false;
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if (mWidth > 0) {
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int width = getContext().getResources().getDimensionPixelOffset(mWidth);
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if (width != params.width) {
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params.width = width;
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changed = true;
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}
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}
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if (mHeight > 0) {
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int height = getContext().getResources().getDimensionPixelOffset(mHeight);
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if (height != params.height) {
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params.height = height;
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changed = true;
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}
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}
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if (changed) {
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setLayoutParams(params);
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}
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}
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/**
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* Draw nothing.
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*
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* @param canvas an unused parameter.
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*/
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@Override
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public void draw(Canvas canvas) {
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}
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/**
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* Compare to: {@link View#getDefaultSize(int, int)}
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* If mode is AT_MOST, return the child size instead of the parent size
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* (unless it is too big).
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*/
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private static int getDefaultSize2(int size, int measureSpec) {
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int result = size;
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int specMode = MeasureSpec.getMode(measureSpec);
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int specSize = MeasureSpec.getSize(measureSpec);
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switch (specMode) {
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case MeasureSpec.UNSPECIFIED:
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result = size;
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break;
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case MeasureSpec.AT_MOST:
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result = Math.min(size, specSize);
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break;
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case MeasureSpec.EXACTLY:
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result = specSize;
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break;
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}
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return result;
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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setMeasuredDimension(
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getDefaultSize2(getSuggestedMinimumWidth(), widthMeasureSpec),
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getDefaultSize2(getSuggestedMinimumHeight(), heightMeasureSpec));
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}
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}
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