我有一个 JTable,为了在 JTable 和其他属性中设置图片作为背景,我使用了这段代码。
tblMainView= new JTable(dtModel){
public Component prepareRenderer(TableCellRenderer renderer, int row,
int column)
{
Component c = super.prepareRenderer( renderer, row, column);
// We want renderer component to be transparent so background image
// is visible
if( c instanceof JComponent )
((JComponent)c).setOpaque(false);
return c;
}
ImageIcon image = new ImageIcon( "images/watermark.png" );
public void paint( Graphics g )
{
// First draw the background image - tiled
Dimension d = getSize();
for( int x = 0; x < d.width; x += image.getIconWidth() )
for( int y = 0; y < d.height; y += image.getIconHeight() )
g.drawImage( image.getImage(), x, y, null, null );
// Now let the regular paint code do it's work
super.paint(g);
}
public boolean isCellEditable(int rowIndex, int colIndex) {
return false;
}
public Class getColumnClass(int col){
if (col == 0)
{
return Icon.class;
}else if(col==7){
return String.class;
} else
return String.class;
}
public boolean getScrollableTracksViewportWidth() {
if (autoResizeMode != AUTO_RESIZE_OFF) {
if (getParent() instanceof JViewport) {
return (((JViewport)getParent()).getWidth() > getPreferredSize().width);
}
}
return false;
}
};
tblMainView.setOpaque(false);
一切正常。但是当我选择一行时,行数据隐藏了。它显示我的行,如
我想要这样的结果, dtModel 是我名为 tblMainView
的 JTable 的 deafultTableModel最佳答案
重写 prepareRenderer()
是一个 recommended为整个表格行进行自定义呈现的方法,但你不能让它做所有事情。特别是 default renderer Icon
应该做你想做的,根本没有理由重写 paint()
。
附录:仔细观察,您选择的字段显示为空,因为 setOpaque(false)
干扰了 DefaultTableCellRenderer
中提到的优化应用程序接口(interface)。 example您复制的内容无效。
作为引用,下面的示例覆盖了 DefaultTableModel
的 getColumnClass()
以获取 default renderer对于类型 Icon
和 Date
。
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.util.Calendar;
import java.util.Date;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
/** @see https://stackoverflow.com/questions/6873665 */
public class JavaGUI extends JPanel {
private static final int ICON_COL = 0;
private static final int DATE_COL = 1;
private static final Icon icon = UIManager.getIcon("Tree.closedIcon");
private final Calendar calendar = Calendar.getInstance();
public JavaGUI() {
CustomModel model = new CustomModel();
JTable table = new JTable(model) {
@Override
public Component prepareRenderer(
TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
if (isRowSelected(row)) {
c.setBackground(Color.blue);
} else {
c.setBackground(Color.white);
}
return c;
}
};
for (int i = 1; i <= 16; i++) {
model.addRow(newRow(i));
}
this.add(table);
}
private Object[] newRow(int i) {
calendar.add(Calendar.DAY_OF_YEAR, 1);
return new Object[]{icon, calendar.getTime()};
}
private static class CustomModel extends DefaultTableModel {
private final String[] columnNames = {"Icon", "Date"};
@Override
public Class<?> getColumnClass(int col) {
if (col == ICON_COL) {
return Icon.class;
} else if (col == DATE_COL) {
return Date.class;
}
return super.getColumnClass(col);
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public String getColumnName(int col) {
return columnNames[col];
}
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
}
private void display() {
JFrame f = new JFrame("JavaGUI");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new JavaGUI().display();
}
});
}
}
关于java - JTable 行选择后台问题。,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6873665/