101 lines
2.8 KiB
Java
101 lines
2.8 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 android.widget;
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import android.content.Context;
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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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/**
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* Space is a lightweight View subclass that may be used to create gaps between components
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* in general purpose layouts.
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*/
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public final class Space extends View {
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/**
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* {@inheritDoc}
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*/
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public Space(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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if (getVisibility() == VISIBLE) {
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setVisibility(INVISIBLE);
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}
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}
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/**
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* {@inheritDoc}
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*/
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public Space(Context context, AttributeSet attrs, int defStyleAttr) {
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this(context, attrs, defStyleAttr, 0);
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}
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/**
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* {@inheritDoc}
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*/
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public Space(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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/**
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* {@inheritDoc}
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*/
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public Space(Context context) {
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//noinspection NullableProblems
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this(context, null);
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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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