有沒有像Windows資源管理器一樣工作的佈局？

Question

我想在文件夾視圖（不是任何列表視圖）中使用像Windows資源管理器一樣工作的佈局管理器。我需要的是Swing中的Marginal Layout panel like Windows 7 Explorer ListView。 有沒有什麼方法可以自定義標準佈局或者您是否知道任何外部佈局？

Answer 1

http://java-sl.com/tip_columns_flow_layout.html以截圖的鏈接和文章下面關於

import javax.swing.*; 
import javax.swing.border.EmptyBorder; 
import java.awt.*; 

public class ColumnsFlowLayout implements LayoutManager { 
    int hGap; 
    int vGap; 
    public ColumnsFlowLayout() { 
     this(2,2); 
    } 

    public ColumnsFlowLayout(int hGap, int vGap) { 
     this.hGap=hGap; 
     this.vGap=vGap; 
    } 
    public void addLayoutComponent(String name, Component comp) { 
    } 

    public void removeLayoutComponent(Component comp) { 
    } 

    public Dimension preferredLayoutSize(Container target) { 
     synchronized (target.getTreeLock()) { 
      Dimension dim = new Dimension(0, 0); 
      int count = target.getComponentCount(); 
      int visibleCount = 0; 
      for (int i=0; i<count; i++) { 
       if (target.getComponent(i).isVisible()) { 
        visibleCount++; 
       } 
      } 
      Insets insets = target.getInsets(); 

      Dimension maxPref=getCellSize(target); 

      if (target.getWidth()!=0) { 
       int maxWidth = target.getWidth() - (insets.left + insets.right); 
       int colCount=maxWidth/(maxPref.width+hGap); 
       int row=visibleCount/colCount; 
       if (visibleCount % colCount!=0) { 
        row++; 
       } 
       dim.width += insets.left + insets.right + hGap*(visibleCount-1)+maxPref.width*visibleCount; 
       dim.height += insets.top + insets.bottom + row*maxPref.height; 
      } 
      else { 
       dim.width += insets.left + insets.right + hGap*(visibleCount-1)+maxPref.width*visibleCount; 
       dim.height += insets.top + insets.bottom + maxPref.height; 
      } 
      return dim; 
     } 
    } 

    private Dimension getCellSize(Container target) { 
     Dimension maxPref=new Dimension(); 
     int count = target.getComponentCount(); 
     for (int i = 0 ; i < count ; i++) { 
      Component m = target.getComponent(i); 
      if (m.isVisible()) { 
       Dimension d = m.getPreferredSize(); 
       maxPref.width = Math.max(maxPref.width, d.width); 
       maxPref.height = Math.max(maxPref.height, d.height); 
      } 
     } 

     return maxPref; 
    } 

    public Dimension minimumLayoutSize(Container target) { 
     return preferredLayoutSize(target); 
    } 

    /** 
    * Lays out the container. 
    * 
    * @param target the specified component being laid out 
    * @see Container 
    * @see  java.awt.Container#doLayout 
    */ 
    public void layoutContainer(Container target) { 
     synchronized (target.getTreeLock()) { 
      Insets insets = target.getInsets(); 
      int maxWidth = target.getWidth() - (insets.left + insets.right); 
      int count = target.getComponentCount(); 
      Dimension cellSize=getCellSize(target); 
      int x=insets.left; 
      int y=insets.top; 
      int row=0; 
      int colCount=maxWidth/(cellSize.width+hGap); 
      int realHGap=colCount>1 ?(maxWidth-colCount*(cellSize.width+hGap))/(colCount-1) : 0; 
      for (int i = 0 ; i < count ; i++) { 
       Component m = target.getComponent(i); 
       if (m.isVisible()) { 
        m.setSize(cellSize.width, cellSize.height); 

        m.setLocation(x, y+row*(cellSize.height+vGap)); 
        x+=hGap+cellSize.width+realHGap; 
        if (x+cellSize.width>=maxWidth) { 
         row++; 
         x=insets.left; 
        } 

       } 
      } 
     } 
    } 

    public static void main(String[] args) { 
     JFrame frame = new JFrame("Multi column flow layout (Windows Explorer like)"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     JPanel container=new JPanel(new ColumnsFlowLayout(3,3)); 
     container.setBorder(new EmptyBorder(2,2,2,2)); 
     for (int i=0; i<27; i++) { 
      container.add(new JButton("Test "+i)); 
     } 
     frame.getContentPane().add(container); 

     frame.setSize(500, 300); 
     frame.setLocationRelativeTo(null); 
     frame.setVisible(true); 
    } 

}