/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* 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 com.alibaba.druid.support.jconsole.model;
import java.awt.Component;
import java.awt.Dimension;
import java.util.Enumeration;
import java.util.Vector;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class ColumnGroup {
/** 合并的JTableHeader的Renderer */
protected TableCellRenderer renderer = null;
/** 合并的单元格的各个实际的最小单元格存储结构 */
protected Vector<Object> vector = null;
/** 合并后单元格显示的文本信息 */
protected String text = null;
/** 合并的单元格内部两个最小JTableHeader的间隙,其实就是去掉线后那个Border */
private int margin = 0;
public ColumnGroup(String text){
this(null, text);
}
public ColumnGroup(TableCellRenderer renderer, String text){
if (renderer == null) {
this.renderer = new DefaultTableCellRenderer() {
private static final long serialVersionUID = 1L;
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {
JTableHeader header = table.getTableHeader();
if (header != null) {
setForeground(header.getForeground());
setBackground(header.getBackground());
setFont(header.getFont());
}
setHorizontalAlignment(JLabel.CENTER);
this.setText((value == null) ? "" : value.toString());
setBorder(UIManager.getBorder("TableHeader.cellBorder"));
return this;
}
};
} else {
this.renderer = renderer;
}
this.text = text;
vector = new Vector<Object>();
}
/**
* 增加单元格
*
* @param obj
*/
public void add(Object obj) {
if (obj == null) return;
vector.addElement(obj);
}
/**
* 根据JTable的某一列取得它的所有的包含列,
*
* @param column
* @param group
* @return
*/
public Vector<ColumnGroup> getColumnGroups(TableColumn column, Vector<ColumnGroup> group) {
// 通过递归判断列到底属于那个ColumnGroup
group.addElement(this);
if (vector.contains(column)) return group;
Enumeration<Object> enumeration = vector.elements();
while (enumeration.hasMoreElements()) {
Object obj = enumeration.nextElement();
if (obj instanceof ColumnGroup) {
@SuppressWarnings("unchecked")
Vector<ColumnGroup> groups = ((ColumnGroup) obj).getColumnGroups(column,
(Vector<ColumnGroup>) group.clone());
if (groups != null) {
return groups;
}
}
}
return null;
}
public TableCellRenderer getHeaderRenderer() {
return renderer;
}
public Object getHeaderValue() {
return text;
}
/**
* 取得合并后的单元格的大小
*
* @return
*/
public int getSize() {
return vector == null ? 0 : vector.size();
}
/**
* 取得合并后的单元格的大小,这个方法需要计算,首先 是取得一个没有合并的最小单元格的JTableHeader 的大小
* 通过Renderer取得组件
*
* @return
*/
public Dimension getSize(JTable table) {
Component comp = renderer.getTableCellRendererComponent(table, getHeaderValue(), false, false, -1, -1);
int height = comp.getPreferredSize().height;
int width = 0;
// 宽度需要计算合并的还要加上间隙
Enumeration<Object> enumeration = vector.elements();
while (enumeration.hasMoreElements()) {
Object obj = enumeration.nextElement();
if (obj instanceof TableColumn) {
TableColumn aColumn = (TableColumn) obj;
width += aColumn.getWidth();
width += margin;
} else {
width += ((ColumnGroup) obj).getSize(table).width;
}
}
return new Dimension(width, height);
}
public java.lang.String getText() {
return text;
}
public boolean removeColumn(ColumnGroup ptg, TableColumn tc) {
boolean retFlag = false;
if (tc != null) {
for (int i = 0; i < ptg.vector.size(); i++) {
Object tmpObj = ptg.vector.get(i);
if (tmpObj instanceof ColumnGroup) {
retFlag = removeColumn((ColumnGroup) tmpObj, tc);
if (retFlag) {
break;
}
} else if (tmpObj instanceof TableColumn) {
if (tmpObj == tc) {
ptg.vector.remove(i);
retFlag = true;
break;
}
}
}
}
return retFlag;
}
public boolean removeColumnGrp(ColumnGroup ptg, ColumnGroup tg) {
boolean retFlag = false;
if (tg != null) {
for (int i = 0; i < ptg.vector.size(); i++) {
Object tmpObj = ptg.vector.get(i);
if (tmpObj instanceof ColumnGroup) {
if (tmpObj == tg) {
ptg.vector.remove(i);
retFlag = true;
break;
} else {
retFlag = removeColumnGrp((ColumnGroup) tmpObj, tg);
if (retFlag) {
break;
}
}
} else if (tmpObj instanceof TableColumn) {
break;
}
}
}
return retFlag;
}
public void setColumnMargin(int margin) {
this.margin = margin;
Enumeration<Object> enumeration = vector.elements();
while (enumeration.hasMoreElements()) {
Object obj = enumeration.nextElement();
if (obj instanceof ColumnGroup) {
((ColumnGroup) obj).setColumnMargin(margin);
}
}
}
public void setHeaderRenderer(TableCellRenderer renderer) {
if (renderer != null) {
this.renderer = renderer;
}
}
public void setText(java.lang.String newText) {
text = newText;
}
}