<
package gui.panel;

import java.awt.BorderLayout;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JToolBar;

import gui.listener.ToolBarListener;
import util.CenterPanel;
import util.GuiUtil;

public class MainPanel extends JPanel {
	// 如何让这个基本面板显示出来
	// 如何让button能在Frame中完美契合
	
	static{
		   GuiUtil.useLNF();
		}
	
	public static MainPanel instance = new MainPanel();
	public JButton bSpend = new JButton("消费一览");
	JButton bRecord = new JButton("记一笔");
	JButton bCategory = new JButton("消费分类");
	JButton bChart = new JButton("月消费报表");
	JButton bSetting = new JButton("设置");
	JButton bRecover = new JButton("备份");
	JButton bBackup = new JButton("恢复");
	Font bigFont = new Font("Grandstander", Font.BOLD, 14);
	JToolBar toolBar = new JToolBar();
	//public JPanel workingPanel;  // It should be modified.
	
	public CenterPanel workingPanel;

	private MainPanel() {
		String parent = "C:\\Users\\ASUS\\Downloads\\hutubill (1)\\img";
		
		GuiUtil.SetFont(bSpend, bigFont, 50, 50);
		GuiUtil.SetFont(bRecord, bigFont, 50, 50);
		GuiUtil.SetFont(bCategory, bigFont, 50, 50);
		GuiUtil.SetFont(bChart, bigFont, 50, 50);
		GuiUtil.SetFont(bSetting, bigFont, 50, 50);
		GuiUtil.SetFont(bRecover, bigFont, 50, 50);
		GuiUtil.SetFont(bBackup, bigFont, 50, 50);
		
		GuiUtil.setImage(bSpend, parent, "home.png");
		GuiUtil.setImage(bRecord, parent, "record.png");
		GuiUtil.setImage(bCategory, parent, "category2.png");
		GuiUtil.setImage(bChart, parent, "report.png");
		GuiUtil.setImage(bSetting, parent, "config.png");
		GuiUtil.setImage(bRecover, parent, "restore.png");
		GuiUtil.setImage(bBackup, parent, "backup.png");
		
		toolBar.add(bSpend);
		toolBar.add(bRecord);
		toolBar.add(bCategory);
		toolBar.add(bChart);
		toolBar.add(bSetting);
		toolBar.add(bRecover);
		toolBar.add(bBackup);
		toolBar.setFloatable(false);
		
		workingPanel = new CenterPanel(0.8);
		
		this.setLayout(new BorderLayout());
		this.add(toolBar, BorderLayout.NORTH);
		this.add(workingPanel, BorderLayout.CENTER);
		
		workingPanel.show(SpendPanel.instance);
		addListener();
	}
	
	public void addListener() {
		ToolBarListener listener = new ToolBarListener();
		bSpend.addActionListener(listener);
	}
	
	public static void main(String[] args) {
		GuiUtil.showPanel(MainPanel.instance, 1);
	}
}
>

<
	// set the font of a button
	public static void SetFont(JButton j, Font font, int sizex, int sizey) {
		j.setSize(sizex, sizey);
		j.setFont(font);
	}
		//setImage method, set the text of button under the img
    public static void setImage(JButton b, String parent, String child) {
		ImageIcon icon = new ImageIcon(new File(parent, child).getAbsolutePath());
		icon.setImage(icon.getImage().getScaledInstance(b.getWidth(),
				b.getHeight(), icon.getImage().SCALE_DEFAULT));
		b.setIcon(icon);
		b.setVerticalTextPosition(JButton.BOTTOM);
		b.setHorizontalTextPosition(JButton.CENTER);
	}
>

<
package startup;
 
import javax.swing.SwingUtilities;
 
import gui.frame.MainFrame;
import gui.panel.MainPanel;
import gui.panel.SpendPanel;
import util.GuiUtil;
 
public class Bootstrap {
    public static void main(String[] args) throws Exception{
        GuiUtil.useLNF();
 
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override
            public void run() {
                MainFrame.instance.setVisible(true);
                MainPanel.instance.workingPanel.show(SpendPanel.instance);
            }
        });
    }
}
>