Java Jtable,使用自定义渲染器和系统L&;显示排序图标TableHeader时出现问题;F
我为我的JTabe头创建了一个自定义渲染器,但在对表进行排序后,当我使用默认系统L&F(在我的情况下是windows 8)时,排序图标不会出现,但当我使用Java L&F时,该图标会出现。Java Jtable,使用自定义渲染器和系统L&;显示排序图标TableHeader时出现问题;F,java,swing,renderer,jtableheader,Java,Swing,Renderer,Jtableheader,我为我的JTabe头创建了一个自定义渲染器,但在对表进行排序后,当我使用默认系统L&F(在我的情况下是windows 8)时,排序图标不会出现,但当我使用Java L&F时,该图标会出现。 使用Java L&F: 带系统L&F: 这是我的类渲染器: private class HeaderRenderer implements TableCellRenderer{ private final LineBorder lb = new LineBorder(new Color(0
使用Java L&F:
带系统L&F:
这是我的类渲染器:
private class HeaderRenderer implements TableCellRenderer{
private final LineBorder lb = new LineBorder(new Color(0, 152, 206));
private final Dimension dim = new Dimension(150, 25);
private TableCellRenderer delegate;
public HeaderRenderer(TableCellRenderer delegate) {
this.delegate = delegate;
}
@Override
public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocused, int row, int column) {
Component comp = delegate.getTableCellRendererComponent(table, value, isSelected, hasFocused, row, column);
if (comp instanceof JLabel) {
JLabel label = (JLabel) comp;
label.setBackground(Color.WHITE);
label.setPreferredSize(dim);
label.setHorizontalAlignment(SwingConstants.CENTER);
label.setBorder(lb);
}
return comp;
}
}
用法:JTableHeader tableHeaderCompnoent = table.getTableHeader();
tableHeaderCompnoent.setDefaultRenderer(new HeaderRenderer(tableHeaderCompnoent.getDefaultRenderer()));
编辑:import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
public class TableRenderingAndSorting extends JFrame {
private JPanel contentPane;
private JTable table_1;
/**
* Launch the application.
*/
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (UnsupportedLookAndFeelException e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
TableRenderingAndSorting frame = new TableRenderingAndSorting();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public TableRenderingAndSorting() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 497, 347);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(new BorderLayout(0, 0));
table_1 = new JTable();
table_1.setModel(new DefaultTableModel(
new Object[][] {
{"1", "Jack", "Developper"},
{"2", "Richard", "Developper"},
{"3", "Jassmine", "Developper"},
{"4", "Tom", "Project leader"},
{"5", "Anna", null},
},
new String[] {
"Col1", "Col2", "Col3"
}
));
table_1.setAutoCreateRowSorter(true);
contentPane.add(new JScrollPane(table_1), BorderLayout.CENTER);
JTableHeader tableHeaderCompnoent = table_1.getTableHeader();
tableHeaderCompnoent.setDefaultRenderer(new HeaderRenderer(tableHeaderCompnoent.getDefaultRenderer()));
table_1.getTableHeader().setDefaultRenderer(new HeaderRenderer(tableHeaderCompnoent.getDefaultRenderer()));
}
private class HeaderRenderer implements TableCellRenderer{
private final LineBorder lb = new LineBorder(new Color(0, 152, 206));
private final Dimension dim = new Dimension(150, 25);
private TableCellRenderer delegate;
public HeaderRenderer(TableCellRenderer delegate) {
this.delegate = delegate;
}
@Override
public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocused, int row, int column) {
Component comp = delegate.getTableCellRendererComponent(table, value, isSelected, hasFocused, row, column);
if (comp instanceof JLabel) {
JLabel label = (JLabel) comp;
label.setBackground(Color.WHITE);
label.setPreferredSize(dim);
label.setHorizontalAlignment(SwingConstants.CENTER);
label.setBorder(lb);
}
return comp;
}
}
}
[…]当我使用默认系统L&F(在我的例子中是windows 8)时,排序图标不会出现,但当我使用Java L&F时,该图标会出现
默认L&F(金属)和系统L&F之间的区别在于,第一个在标题单元格的中心(垂直对齐)绘制排序图标,后者在标题单元格的顶部绘制
接下来要做的是为标题单元格绘制边框。边框是从构件的边缘向内绘制的,这意味着它在构件的区域上绘制。由于排序图标位于系统L&F的边缘,因此它由边框覆盖
您可以通过删除边框或将标签添加到将处理边框的JPanel
来解决此问题:
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocused, int row, int column) {
Component comp = delegate.getTableCellRendererComponent(table, value, isSelected, hasFocused, row, column);
JPanel panel = new JPanel(new BorderLayout());
if (comp instanceof JLabel) {
JLabel label = (JLabel) comp;
label.setBackground(Color.WHITE);
label.setHorizontalAlignment(SwingConstants.CENTER);
panel.add(label);
panel.setBorder(lb);
}
return panel;
}
如@mKorbel所述,我删除了setPreferredSize
,并且dim
字段也应随之删除
还有,排队
JTableHeader tableHeaderCompnoent = table_1.getTableHeader();
tableHeaderCompnoent.setDefaultRenderer(new HeaderRenderer(tableHeaderCompnoent.getDefaultRenderer()));
table_1.getTableHeader().setDefaultRenderer(new HeaderRenderer(tableHeaderCompnoent.getDefaultRenderer()));
第二个和第三个是相同的,您可以删除第三个。它正常工作(排序图标)吗?是的,Java L&F正常工作,但当我更改L&F时,它不会出现。您是在启动时设置L&F,还是在JTable已经显示时(即通过从应用程序菜单中选择系统L&F)设置L&F?@Axel我正在设置应用程序启动时的L&F(主类)句子中没有上下文的空单词,为了更好地帮助您更快地发布一个SSCCE/MCVE,简短、可运行、可编译,在局部变量中为JTable/XxxTableModel硬编码值,AFAIK Win8/8.1在使用/不使用SystemL&F对icongood catch+1进行排序时没有任何问题,-1Mio用于标签。设置首选尺寸(dim);,为什么不重复使用排序图标JLabel.setIcon并使用不透明的JPanel和LayoutManager@mKorbel我没有添加
标签。setPreferredSize(dim)
,这是OP拥有的。我只是指出了问题所在,并提出了解决方法,因为他们没有提出问题或请求。我没有试图修复整个代码。什么是“Mio”?@user1803551-1Mio==-1.000.000,-@mKorbel I删除了setPreferredSize
。至于图标,我认为要获得列的排序顺序并正确设置图标需要做很多工作。如果您希望图标仍然位于北面,则必须使用布局管理器。@user1803551 JLabel有两种直接拥有文本和图标的方法,这是XxxRenderer的正确工作