java 在 Gridlayout 中增加行大小

Increase a row size in Gridlayout

提问by chenna

The above frame contains gridlayout with two rows. First row is text area,second is a panel with two checkboxes. I want to increase height of first row so that first row should be 75% of Total height and second row should be 25%. How can I do that? Here is my code snippet:

上面的框架包含两行的 gridlayout。第一行是文本区域，第二行是带有两个复选框的面板。我想增加第一行的高度，以便第一行应该是总高度的 75%，第二行应该是 25%。我怎样才能做到这一点？这是我的代码片段：

   setLayout(new GridLayout(2, 0, 0, 0));       
    Panel text_panel = new Panel();
    add(text_panel);
    text_panel.setLayout(new GridLayout(1, 0, 0, 0));   
    JTextArea textArea = new JTextArea();
    textArea.setText("text to be displayed");
    JScrollPane scroll = new JScrollPane (textArea);
    text_panel.add(scroll);
    textArea.setLineWrap(true);
    textArea.setWrapStyleWord(true);
    textArea.setEditable(false);
    Border border = BorderFactory.createLineBorder(Color.GRAY);
    textArea.setBorder(border);
    textArea.setFont(new Font("Arial",Font.PLAIN,12));
    textArea.setCaretPosition(0);
    textArea.requestFocus();
    Panel checebox_panel = new Panel();
    checebox_panel.setBackground(Color.WHITE);
    add(checebox_panel);
    checebox_panel.setLayout(new GridLayout(1, 0, 0, 0));


    androidCheckBox = new JCheckBox("Open start page");
    androidCheckBox.setBackground(Color.WHITE);
    androidCheckBox.addItemListener(itemListener);
    androidCheckBox.setSelected(true);
    checebox_panel.add(androidCheckBox);

    eclipseCheckBox = new JCheckBox("register for updates");
    eclipseCheckBox.setBackground(Color.WHITE);
    eclipseCheckBox.addItemListener(itemListener);
    eclipseCheckBox.setSelected(true);
    checebox_panel.add(eclipseCheckBox);

回答by Dodd10x

This is not possible with GridLayout. GridLayout will always use even spacing. Look into another layout manager.

这在 GridLayout 中是不可能的。GridLayout 将始终使用均匀间距。查看另一个布局管理器。

Here is a good reference:

这是一个很好的参考：

https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html

https://docs.oracle.com/javase/tutorial/uiswing/layout/visual.html

回答by mcCat

With GridLayout you can't have two rows that are different sizes. Look into BoxLayout. Something like this:

使用 GridLayout 你不能有两行不同的大小。查看 BoxLayout。像这样的东西：

JPanel content = new JPanel();
frame.getContentPane().add(content);
LayoutManager layout = new BoxLayout(content, BoxLayout.Y_AXIS);
Box boxes[] = new Box[2];
boxes[0] = Box.createHorizontalBox();
boxes[1] = Box.createHorizontalBox();

boxes[0].createGlue();
boxes[1].createGlue();

content.add(boxes[0]);
content.add(boxes[1]);  

JPanel panel = new JPanel();    
JPanel panel2 = new JPanel();

panel.setPreferredSize(new Dimension(500,300));
panel2.setPreferredSize(new Dimension(500,200));

boxes[0].add(panel);
boxes[1].add(panel2);

Using setPreferredSizeis never optimal, but it works. This is just an example of how you could do it, I'm sure there is better ways though! ;)

使用setPreferredSize从来都不是最优的，但它有效。这只是您如何做到的一个示例，但我相信有更好的方法！;)

回答by Jalal Hussain Barzi

"Increase a row size in Gridlayout"I came across this requirement and by trying to device a solution I got one, tried border instead grid layout. it might be helpful :)

“在 Gridlayout 中增加行大小”我遇到了这个要求，并通过尝试解决我得到的解决方案，尝试使用边框而不是网格布局。它可能会有所帮助:)

here is the code:

这是代码：

import ComponentMeta.RequiredComp;
import javax.swing.*;
import java.awt.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class PromptPopup extends JDialog {
    private final JScrollPane scrollPane = new JScrollPane();
    private int rows;
    private int cols;
    private int vGap;
    private int hGap;
    private Map<String, Component> componentRepo;

    public PromptPopup(JFrame parent) {
        super(parent);
        componentRepo = new HashMap<>();
        this.setModalityType(ModalityType.APPLICATION_MODAL);
    }

    public void setComponentsDisplayStyle(int rows, int cols, int vGap, int hGap) {
        this.rows = rows;
        this.cols = cols;
        this.vGap = vGap;
        this.hGap = hGap;
    }

    public void setComponentReop() {
        JTextField dynamicParamTextField = new JTextField();
        this.componentRepo.put("COMPANY_CODE", dynamicParamTextField);
        JTextField dynamicParamTextField2 = new JTextField();
        this.componentRepo.put("DIST_CODE", dynamicParamTextField2);
        JTextField dynamicParamTextField3 = new JTextField();
        this.componentRepo.put("LOCA_CODE", dynamicParamTextField3);
        JTextField dynamicParamTextField4 = new JTextField();
        this.componentRepo.put("TOKEN_EXEC", dynamicParamTextField4);
    }

    public void initPopupUI() {
        //Setting content panes layout
        getContentPane().setLayout(new BorderLayout(0, 0));

        //Creating a root panel(root container) to hold the child components
        JPanel rootContainer = new JPanel();
        rootContainer.setLayout(new BorderLayout());

        //Creating header panel(header container) to hold the header components
        JPanel header = new JPanel();
        header.setLayout(new FlowLayout());
        JLabel headerText = new JLabel("Source query parameters required ");
        headerText.setForeground(Color.WHITE);
        header.add(headerText);
        header.setBackground(Color.BLUE);

        //Creating footer panel(footer container ) to hold the footer components
        JPanel footer = new JPanel();
        footer.setLayout(new FlowLayout());
        JButton executeWithParamsButton = new JButton("Execute with params");
        executeWithParamsButton.setBackground(Color.BLACK);
        executeWithParamsButton.setForeground(Color.WHITE);
        JButton cancelButton = new JButton("Cancel");
        cancelButton.setBackground(Color.RED);
        cancelButton.setForeground(Color.WHITE);
        footer.add(executeWithParamsButton);
        footer.add(cancelButton);
        footer.setBackground(Color.BLUE);

        //Creating content panel(content container) to hold the all dynamically generated components
        JPanel contentContainer = new JPanel();
        GridLayout gridLayout = new GridLayout(this.rows, this.cols, this.hGap, this.vGap);
        contentContainer.setLayout(gridLayout);
        for (Map.Entry entry : componentRepo.entrySet()) {
            JLabel dynamicParamLabel = new JLabel(entry.getKey().toString());
            contentContainer.add(dynamicParamLabel);
            contentContainer.add((Component) entry.getValue());
        }


        // Adding all the created containers to the root container one by one
        rootContainer.add(header, BorderLayout.NORTH);
        rootContainer.add(contentContainer, BorderLayout.CENTER);
        rootContainer.add(footer, BorderLayout.SOUTH);

        //Adding the root container to the scroll pane in order the view to be scrollable nno matter how many components are there.
        scrollPane.setViewportView(rootContainer);
        getContentPane().add(scrollPane);
    }
}

And Here is output I wanted i.e The Header to be on top consuming space only based on it's components and same for the Center panel and The footer containing button controls.

这是我想要的输出，即 Header 位于顶部，仅基于它的组件消耗空间，对于 Center 面板和包含按钮控件的页脚也是如此。

output

输出