我正在尝试创建一个带有行头的JTable,它看起来就像一个列头,但我已经花费了太多时间:/
我的情况类似于这个问题:JTable Row Header Implementation
也可能是这个问题:customizing jtable cellrenderer with table's cell header color
它们似乎还没有完全解决我的问题。我已经搜索并尝试了许多示例,但都不够完美。甚至Oracle/Sun公司也没有任何关于带有行头的表格示例。这种类型的表格似乎不应该那么罕见。
其中一个示例只是格式化了第一列,但它看起来并不像列头:http://java-swing-tips.blogspot.com/2011/01/jtable-rowheader.html
另一个示例似乎使用JList作为行头,并且存在对齐问题(每行+1像素偏移),当我设置外观时也不好看。http://www.java2s.com/Code/Java/Swing-Components/TableRowHeaderExample.htm
这个示例看起来像我需要使用的思路(行头是单独的JTable,然后作为行头加载到JScrollPane中),但我需要将其适应我的代码,并确保行头获得正确的头部外观和风格。
http://www.chka.de/swing/table/row-headers/JTable.html
除了最后一点之外,我已经这样做了。我尝试让表头的渲染器也成为行头的渲染器。现在,行头/第一列是灰色的,而不是当它只是另一列数据时的白色,但仍然不像列头。这是正确的吗?还是我应该将其保留为主表中的常规列并对其进行其他处理?
下面是我更新表格的代码。此方法只采用一个字符串数组作为列标题,一个字符串数组作为行标题和一个2D字符串数组作为主数据。我有一个用于行头的JTable dispTableRowHeader和一个用于主数据表的JTable dispTable。
private void updateDispTable(String[][] graphicalTable, String[] graphicalTableColumnHeader, String[] graphicalTableRowHeader) {
//set model for the main data table, put in data. Also prevent editing cells
dispTable.setModel(new javax.swing.table.DefaultTableModel(
graphicalTable,
graphicalTableColumnHeader
){
@Override
public boolean isCellEditable(int rowIndex, int mColIndex) {
return false;
}
});
//some mods for main data table
dispTable.getTableHeader().setReorderingAllowed(false);//Was also able to do this within NetBeans GUI Builder by doing Table Contents from Jtable inspector item
dispTable.getTableHeader().setResizingAllowed(false);
//load main table to scrollpane
jScrollPane2.setViewportView(dispTable);
//get model for JTable that will be used as the row header, fill in values
DefaultTableModel rowHeaderTableModel = new DefaultTableModel(0, 1);//one column
for (int i = 0; i < graphicalTable.length; i++)
rowHeaderTableModel.addRow(new Object[] { graphicalTableRowHeader[i] } );
//set model for row header, put in data. Alter renderer to make it like col header
dispTableRowHeader.setModel(rowHeaderTableModel);
dispTableRowHeader.setDefaultRenderer(Object.class, dispTableRowHeader.getTableHeader().getDefaultRenderer());//makes it gray but not like the header :/
//dispTableRowHeader.setDefaultRenderer(Object.class, jScrollPane2.getColumnHeader().getDefaultRenderer());
//load row header to scrollpane's row header
jScrollPane2.setRowHeaderView(dispTableRowHeader);
//set the table corner and disallow reordering and resizing
JTableHeader corner = dispTableRowHeader.getTableHeader();
corner.setReorderingAllowed(false);
corner.setResizingAllowed(false);
jScrollPane2.setCorner(JScrollPane.UPPER_LEFT_CORNER, corner);//load to scrollpane
}
非常感谢任何帮助!
编辑以下内容 我创建了一个全新的项目进行实验,并尝试了trashgod的方法(虽然是针对行标题而不是第二行),我发现它给出了与只将单元格样式设置为灰色相同的结果,而不是像标题一样进行样式设置。然后我尝试删除我的外观调整。
// Set System L&F
UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
然后行头看起来和列头一样!但那是在Nimbus或其他默认外观下。请参见以下图像。第一张是使用系统的外观(在Win7中),第二张是默认设置。
系统外观(Win7)-
Java的Nimbus外观-
果然,我的程序也发生了同样的情况。所以现在似乎我的问题出在外观上。我想让它看起来像第一张图片(系统的外观),但左边也要样式化。
顺便说一句,在Win7中有一个MySQL Workbench的示例,它具有适当样式的行和列标题,并且它们甚至在鼠标悬停时都会给单元格带来蓝色阴影。太糟糕了它不是用Java制作的,否则我可以尝试检查他们是如何做到的。
MySQL Workbench截图-
以下是SSCCE代码
package mytableexample2;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
public class MyTableExample2 extends javax.swing.JFrame {
public MyTableExample2() {
initComponents();
}
@SuppressWarnings("unchecked")
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable(){
@Override
public Component prepareRenderer(
TableCellRenderer renderer, int row, int col) {
if (col == 0) {
return this.getTableHeader().getDefaultRenderer()
.getTableCellRendererComponent(this,
this.getValueAt(row, col), false, false, row, col);
} else {
return super.prepareRenderer(renderer, row, col);
}
}
};
jTable1.setAutoCreateRowSorter(false);
final JTableHeader header = jTable1.getTableHeader();
header.setDefaultRenderer(new HeaderRenderer(jTable1));
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"Row 1", "Data 2", "Data 3", "Data 4", "Data 5"},
{"Row 2", "Data 6", "Data 7", "Data 8", "Data 9"},
{"Row 3", "Data 10", "Data 11", "Data 12", "Data 13"}
},
new String [] {
"", "Col 1", "Col 2", "Col 3", "Col 4"
}
));
jScrollPane1.setViewportView(jTable1);
//Netbeans generated layout
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 278, Short.MAX_VALUE)
.addContainerGap())
);
pack();
}
public static void main(String args[]) {
try {
//THIS SETS TO SYSTEM'S LOOK AND FEEL
UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
//THIS SETS TO OTHER JAVA LOOK AND FEEL
//UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
//UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MyTableExample2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MyTableExample2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MyTableExample2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MyTableExample2.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MyTableExample2().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
}
class HeaderRenderer implements TableCellRenderer {
TableCellRenderer renderer;
public HeaderRenderer(JTable jTable1) {
renderer = jTable1.getTableHeader().getDefaultRenderer();
}
@Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int col) {
return renderer.getTableCellRendererComponent(
table, value, isSelected, hasFocus, row, col);
}
}