定製TableHeaderUI打破習俗，TableRowSorter還

我寫了一個定製TableRowSorter改變的排序順序，當你從
SortOrder.UNSORTED =>SortOrder.ASCENDING =>SortOrder.DESCENDING =>SortOrder.ASCENDING =>SortOrder.DESCENDING => ...
在JTableHeader點擊
SortOrder.UNSORTED =>SortOrder.ASCENDING =>SortOrder.DESCENDING =>SortOrder.UNSORTED =>SortOrder.ASCENDING =>SortOrder.DESCENDING => ...定製TableHeaderUI打破習俗，TableRowSorter還

ADU_SortOrder.java

package order; 

import java.util.ArrayList; 
import java.util.List; 

import javax.swing.SortOrder; 
import javax.swing.table.TableModel; 
import javax.swing.table.TableRowSorter; 

public class ADU_SortOrder<M extends TableModel> extends TableRowSorter<M> { 
    public ADU_SortOrder(M model) { 
     setModel(model); 
    } 

    boolean firstTime = true; //Needed in case there are any initial sort keys 
    int columnHolder = -1; 

    @Override 
    public void toggleSortOrder(int column) { 
     List<? extends SortKey> sortKeys = getSortKeys(); 
     if(sortKeys.size() == 0) { //For if there are no initial sort keys 
      List<SortKey> keys = new ArrayList<SortKey>(); 
      keys.add(new SortKey(column, SortOrder.ASCENDING)); 
      setSortKeys(keys); 
      return; 
     } 

     if (sortKeys.size() > 0 && columnHolder == column || firstTime) { 
      if(firstTime) { 
       firstTime = false; 
       columnHolder = column; 
       if(column != sortKeys.get(0).getColumn()) { 
        List<SortKey> keys = new ArrayList<SortKey>(getSortKeys()); 
        keys.set(0, new SortKey(column, SortOrder.ASCENDING)); 
        setSortKeys(keys); 
        return; 
       } 
      } 

      List<SortKey> keys = new ArrayList<SortKey>(getSortKeys()); 
      keys.set(0, new SortKey(column, setNextOrder(sortKeys.get(0).getSortOrder()))); 
      setSortKeys(keys); 
      return; 
     } else if(sortKeys.size() > 0 && columnHolder != column && !firstTime) { 
      List<SortKey> keys = new ArrayList<SortKey>(getSortKeys()); 
      keys.set(0, new SortKey(column, SortOrder.ASCENDING)); 
      setSortKeys(keys); 
      columnHolder = column; 
      return; 
     } 
     super.toggleSortOrder(column); 
    } 

    private SortOrder setNextOrder(SortOrder order) { 
     switch (order) { 
      case ASCENDING: 
       return SortOrder.DESCENDING; 
      case DESCENDING: 
       return SortOrder.UNSORTED; 
      case UNSORTED: 
       return SortOrder.ASCENDING; 
      default: 
       return SortOrder.UNSORTED; 
     } 
    } 
}

當你實現它的作品真的很好弄成這個樣子

JTableTest.java - 工作實例

import java.awt.GridLayout; 

import java.util.List; 
import java.util.ArrayList; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.table.TableModel; 
import javax.swing.RowSorter; 
import javax.swing.SortOrder; 

import order.ADU_SortOrder; 

@SuppressWarnings("serial") 
public class JTableTest extends JFrame { 
    private JTableTest() { 
     super("JTable Test"); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setLayout(new GridLayout(1, 1)); 
     createPanel(); 
     pack(); 
     setVisible(true); 
    } 

    JPanel panel = new JPanel(new GridLayout(1, 1)); 
    JScrollPane scroll; 

    private void createPanel() { 
     Object[] headers = {"Select", "Title", "Artist", "Length", "Title"}; 
     Object[][] sampleData = {{true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"}, 
       {false, "Spanish Train", "Chris De Burgh", "358", "Spanish Train"}, 
       {true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"}}; 
     JTable table = new JTable(sampleData, headers); 

     //Sort Order Part 
     ADU_SortOrder<TableModel> sortOrder = new ADU_SortOrder<TableModel>(table.getModel()); 
     List<RowSorter.SortKey> sortKeys = new ArrayList<>(); 
     sortKeys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING)); 
     sortOrder.setSortKeys(sortKeys); 
     table.setRowSorter(sortOrder); 

     scroll = new JScrollPane(table); 
     panel.add(scroll); 
     getContentPane().add(panel); 
    } 

    public static void main(String[] args) { 
     new JTableTest(); 
    } 
}

然而，一旦你添加自定義的例子如BasicTableHeaderUI一個在下面。

CustomHeaderUI.java

package ui; 
import javax.swing.plaf.basic.BasicTableHeaderUI; 
import javax.swing.table.TableColumnModel; 

@SuppressWarnings("serial") 
public class CustomHeaderUI extends BasicTableHeaderUI { 
    public void canReorder(String col, boolean reorder) { 
     TableColumnModel cM = header.getColumnModel(); 

     for(int i = 0; i < cM.getColumnCount(); i++) { 
      if(header.getTable().getColumnName(i).equals(col)) { 
       canReorder(i, reorder); 
       break; 
      } 
     } 
    } 

    public void canReorder(String col, int instance, boolean reorder) { 
     TableColumnModel cM = header.getColumnModel(); 
     int column = -1; 

     for(int i = 0; i < cM.getColumnCount(); i++) { 
      if(header.getTable().getColumnName(i).equals(col)) { 
       column++; 
       if(column == instance - 1) { 
        canReorder(i, reorder); 
        break; 
       } 
      } 
     } 
    } 

    public void canReorderAll(String col, boolean reorder) { 
     TableColumnModel cM = header.getColumnModel(); 

     for(int i = 0; i < cM.getColumnCount(); i++) { 
      if(header.getTable().getColumnName(i).equals(col)) 
       canReorder(i, reorder); 
     } 
    } 

    public void canReorder(int col, boolean reorder) { 

    } 
}

JTableTest.java - SSSCE/MCVE

import java.awt.GridLayout; 

import java.util.List; 
import java.util.ArrayList; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTable; 
import javax.swing.RowSorter; 
import javax.swing.RowSorter.SortKey; 
import javax.swing.SortOrder; 
import javax.swing.table.JTableHeader; 
import javax.swing.table.TableModel; 

import order.ADU_SortOrder; 

import ui.CustomHeaderUI; 

@SuppressWarnings("serial") 
public class JTableTest extends JFrame { 
    private JTableTest() { 
     super("JTable Test"); 
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     setLayout(new GridLayout(1, 1)); 
     createPanel(); 
     pack(); 
     setVisible(true); 
    } 

    JPanel panel = new JPanel(new GridLayout(1, 1)); 
    JScrollPane scroll; 

    private void createPanel() { 
     Object[] headers = {"Select", "Title", "Artist", "Length", "Title"}; 
     Object[][] sampleData = {{true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"}, 
       {false, "Spanish Train", "Chris De Burgh", "358", "Spanish Train"}, 
       {true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"}}; 
     JTable table = new JTable(sampleData, headers); 
     ADU_SortOrder<TableModel> sortOrder = new ADU_SortOrder<TableModel>(table.getModel()); 
     List<SortKey> keys = new ArrayList<SortKey>(); 
     keys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING)); 
     sortOrder.setSortKeys(keys); 
     table.setRowSorter(sortOrder); 

     //Adds Custom UI 
     CustomHeaderUI headerUI = new CustomHeaderUI(); 
     headerUI.installUI(table.getTableHeader()); 

     headerUI.canReorder("Title", true); 
     headerUI.canReorder("Title", 1, true); 
     headerUI.canReorderAll("Title", true); 
     headerUI.canReorder(3, true); 

     scroll = new JScrollPane(table); 
     panel.add(scroll); 
     getContentPane().add(panel); 
    } 

    public static void main(String[] args) { 
     new JTableTest(); 
    } 
}

這包括一些樣品CustomHeaderUI方法清楚地顯示了這兩個問題。首先排序順序不正確。如果你開始的第一列Column 0的排序順序是
SortOrder.ASCENDING =>SortOrder.UNSORTED =>SortOrder.DESCENDING =>SortOrder.ASCENDING =>SortOrder.UNSORTED =>SortOrder.DESCENDING => ...

開始，因爲keys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING));的上升不becasue的一個小故障與我的代碼

這不是在開始描述的所需的排序順序。第二個問題是，當您拖動MCVE中的列時，它會跳轉兩列而不是一列。我真的很感謝幫助解決這些問題。

來源

2016-11-24 Dan

headerUI.installUI(table.getTableHeader());

在這種情況下，MouseListener被複制安裝在JTableHeader。

[email protected] 
[email protected]a835 
TEST: installUI 
[email protected] 
[email protected]a835 
[email protected]0210

因此，就需要使用table.getTableHeader().setUI(headerUI);代替：被執行
- BasicTableHeaderUI#uninstallUI(...)方法之前BasicTableHeaderUI#installUI(...)方法本JTableHeader#setUI()方法內自動執行（準確的說，this method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component）
- 參考：A Swing Architecture Overview - The Inside Story on JFC Component Design By Amy Fowler

import java.awt.*; 
import java.awt.event.*; 
// import java.util.List; 
// import java.util.ArrayList; 
import javax.swing.*; 
import javax.swing.plaf.basic.BasicTableHeaderUI; 
import javax.swing.table.*; 
import javax.swing.table.TableColumnModel; 
//import ui.CustomHeaderUI; 

public class JTableTest2 extends JFrame { 
    private JTableTest2() { 
    super("JTable Test"); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    setLayout(new GridLayout(1, 1)); 
    createPanel(); 
    pack(); 
    setVisible(true); 
    } 

    JPanel panel = new JPanel(new GridLayout(1, 1)); 

    private void createPanel() { 
    Object[] headers = {"Select", "Title", "Artist", "Length", "Title"}; 
    Object[][] sampleData = { 
     {true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"}, 
     {false, "Spanish Train", "Chris De Burgh", "358", "Spanish Train"}, 
     {true, "Bat Outta Hell", "Meat Loaf", "673", "Bat Outta Hell"} 
    }; 
    JTable table = new JTable(sampleData, headers); 

    // Custom TableRowSorter is completely irrelevant to this problem: 
    // //Sort Order Part 
    // ADU_SortOrder<TableModel> sortOrder = new ADU_SortOrder<>(table.getModel()); 
    // List<RowSorter.SortKey> sortKeys = new ArrayList<>(); 
    // sortKeys.add(new RowSorter.SortKey(0, SortOrder.ASCENDING)); 
    // sortOrder.setSortKeys(sortKeys); 
    // table.setRowSorter(sortOrder); 

    JTableHeader header = table.getTableHeader(); 
    testPrintMouseListener(header); 

    //Adds Custom UI 
    CustomHeaderUI headerUI = new CustomHeaderUI(); 
    //XXX: headerUI.installUI(table.getTableHeader()); 
    table.getTableHeader().setUI(headerUI); 

    testPrintMouseListener(header); 

    panel.add(new JScrollPane(table)); 
    getContentPane().add(panel); 
    } 

    private static void testPrintMouseListener(JTableHeader header) { 
    for (MouseListener l : header.getMouseListeners()) { 
     System.out.println(l); 
    } 
    } 

    public static void main(String... args) { 
    EventQueue.invokeLater(() -> { 
     new JTableTest2(); 
    }); 
    } 
} 

class CustomHeaderUI extends BasicTableHeaderUI { 
    @Override public void installUI(JComponent c) { 
    super.installUI(c); 
    System.out.println("TEST: installUI"); 
    } 
}

來源

2016-11-25 06:37:38 aterai

謝謝你這樣 – Dan

定製TableHeaderUI打破習俗，TableRowSorter還

回答

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