| /* |
| * Copyright (C) 2011 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 android.widget; |
| |
| import android.content.Context; |
| import android.graphics.Canvas; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| /** |
| * Space is a lightweight View subclass that may be used to create gaps between components |
| * in general purpose layouts. |
| */ |
| public final class Space extends View { |
| /** |
| * {@inheritDoc} |
| */ |
| public Space(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| if (getVisibility() == VISIBLE) { |
| setVisibility(INVISIBLE); |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Space(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Space(Context context) { |
| //noinspection NullableProblems |
| this(context, null); |
| } |
| |
| /** |
| * Draw nothing. |
| * |
| * @param canvas an unused parameter. |
| */ |
| @Override |
| public void draw(Canvas canvas) { |
| } |
| |
| /** |
| * Compare to: {@link View#getDefaultSize(int, int)} |
| * If mode is AT_MOST, return the child size instead of the parent size |
| * (unless it is too big). |
| */ |
| private static int getDefaultSize2(int size, int measureSpec) { |
| int result = size; |
| int specMode = MeasureSpec.getMode(measureSpec); |
| int specSize = MeasureSpec.getSize(measureSpec); |
| |
| switch (specMode) { |
| case MeasureSpec.UNSPECIFIED: |
| result = size; |
| break; |
| case MeasureSpec.AT_MOST: |
| result = Math.min(size, specSize); |
| break; |
| case MeasureSpec.EXACTLY: |
| result = specSize; |
| break; |
| } |
| return result; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| setMeasuredDimension( |
| getDefaultSize2(getSuggestedMinimumWidth(), widthMeasureSpec), |
| getDefaultSize2(getSuggestedMinimumHeight(), heightMeasureSpec)); |
| } |
| } |