gridbadlayout垂直间隙

Question

我正在用som按钮制作面板。

但我希望按钮彼此接触，换句话说，我希望垂直差距消失。但按钮不应调整大小。我该怎么去做这件事？

我的代码：

this.setLayout(new GridBagLayout()); 
    GridBagConstraints constraints = new GridBagConstraints(); 

    constraints.fill = GridBagConstraints.HORIZONTAL; 
    constraints.gridwidth = 2; 
    constraints.weightx = 1D; 
    constraints.weighty = 1D; 
    constraints.gridx = 0; 
    constraints.gridy = 0; 
    int row = 0; 
    for (MainAction actie : mainActions) { 
     constraints.gridy = row; 
     row++; 
     SelectedActionButton but = new SelectedActionButton(selectedActionModel, actie); 
     this.add(but, constraints); 

    } 
    constraints.gridwidth = 1; 
    constraints.weightx = 0.5D; 
    row *=2; 
    for (AbstractAction actie : objectActions) { 
     constraints.gridy = row/2; 
     constraints.gridx = row%2; 
     row++; 
     SelectedObjectButton but = new SelectedObjectButton(selectedObjectModel, actie); 
     but.setMargin(new Insets(0, 0, 0, 0)); 
     this.add(but, constraints); 
    } 

在此先感谢

Answer 1

更改以下行

constraints.weighty = 1D; 

到

constraints.weighty = 0D; 

将解决您的问题。

更新：调整所有按钮北您可以在最后一行添加一个附加组件吃的所有可用空间：

constraints.weighty = 1D; 
constraints.gridy = row; 
this.add(Box.createGlue(), constraints);