hades
3 years ago
5 changed files with 82 additions and 15 deletions
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package com.fr.common.listener; |
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import com.fr.design.data.DesignTableDataManager; |
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import javax.swing.event.AncestorEvent; |
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import javax.swing.event.AncestorListener; |
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import javax.swing.event.ChangeListener; |
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/** |
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* 管理数据集相关监听的注册 |
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* |
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* 原本的监听生命周期注册与销毁: |
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* |
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* 创建时组件时进行注册,在模板关闭时进行销毁 |
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* 但是在模板未关闭的这段时间,如果不断的打开和关闭某些弹窗,次数达到一定程度,会导致出现大量内存占用,除非此时关闭模板 |
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* |
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* 改成以下模式: |
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* |
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* 当组件可见或者被添加到某个大组件 注册相关监听 |
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* 当组件不可见或者被移除时 立即移除相关监听 |
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* 及时清理无效监听,减少实时内存占用 |
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* |
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* |
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* @author hades |
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* @version 11.0 |
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* Created by hades on 2022/2/14 |
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*/ |
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public class ManageDsListenerRegisterListener implements AncestorListener { |
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private ChangeListener changeListener; |
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public ManageDsListenerRegisterListener(ChangeListener changeListener) { |
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this.changeListener = changeListener; |
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} |
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@Override |
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public void ancestorAdded(AncestorEvent event) { |
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DesignTableDataManager.addDsChangeListener(changeListener); |
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} |
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@Override |
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public void ancestorRemoved(AncestorEvent event) { |
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DesignTableDataManager.removeDsChangeLister(changeListener); |
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} |
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@Override |
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public void ancestorMoved(AncestorEvent event) { |
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// do nothing
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} |
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} |
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