[英]Java Swing - Null Layout - How to set Z index for components?
我正在嘗試創建一個freecell游戲,但由於布局方面的問題,我尚未實現邏輯。
我無法解決的主要問題是,JFrame按繪制卡片的順序對卡片Z索引值進行排序,以使繪制的第一張卡片具有最高的Z索引。
我正在嘗試使z索引可變。
我使用的是空布局-教授的指示說不要利用任何經理或外部布局幫助。 (啊)
嘗試的解決方案:
我嘗試通過實例化窗格,將其邊界設置為恰好適合JFrame,將我的所有卡添加到“分層”窗格中,然后將窗格添加到JFrame中來使用JLayeredPane,但這沒有用。
我嘗試使用“ setComponentZOrder(comp,index)”,但這也沒有改變軸。
下面是我的代碼。 沒有辦法在null布局上執行此操作嗎?
如果您嘗試運行該程序,則該oneDrive鏈接包含卡映像。
主要:
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.io.File;
import java.util.*;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
@SuppressWarnings("serial")
public class FreeCellGame extends JFrame implements MouseListener, MouseMotionListener
{
public ArrayList<String> randomizedKeys = new ArrayList<String>();
public HashMap<String, CardImagePanel> allCards;
public static void main(String[] args)
{
FreeCellGame projectBoard = new FreeCellGame();
projectBoard.allCards = new HashMap<String, CardImagePanel>();
projectBoard.setSize(1218,800);
projectBoard.setLayout(null);
projectBoard.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
projectBoard.allCards = projectBoard.loadCardObjects(projectBoard.allCards);
projectBoard = projectBoard.placeCardsOnBoard(projectBoard);
projectBoard = addshapes(projectBoard);
projectBoard.repaint();
projectBoard.revalidate();
projectBoard.setVisible(true);
}
private static FreeCellGame addshapes(FreeCellGame projectBoard) {
int xPos = 0;
int yPos = 50;
JLabel foundations = new JLabel("Foundations");
foundations.setBounds(790, 50, 300, 50);
foundations.setFont(new Font("Courier New", Font.BOLD, 30));
projectBoard.add(foundations);
JLabel freeCells = new JLabel("Free Cells");
freeCells.setBounds(210, 200, 300, 50);
freeCells.setFont(new Font("Courier New", Font.BOLD, 30));
projectBoard.add(freeCells);
for(int i = 0; i < 8; i++)
{
JPanel rect = new JPanel();
rect.setBorder(BorderFactory.createLineBorder(Color.black));
rect.setBounds(xPos, yPos, 150, 150);
projectBoard.add(rect);
xPos+=150;
if(i == 3)
{
yPos = 100;
}
}
return projectBoard;
}
private HashMap<String, CardImagePanel> loadCardObjects(HashMap<String, CardImagePanel> allCards)
{
File folder = new File("C:/Users/chris/Documents/GitHub/EclipseProjects/C585-FreeCell/src/images");
File[] listOfFiles = folder.listFiles();
allCards = new HashMap<String, CardImagePanel>();
for (File file : listOfFiles) {
if (file.isFile()) {
String hashKey = file.getName();
randomizedKeys.add(hashKey);
CardImagePanel currentImage = new CardImagePanel(file);
currentImage.setPreferredSize(new Dimension(157, 157));//5px on both sides as margin
allCards.put(hashKey, currentImage);
allCards.get(hashKey).addMouseListener(allCards.get(hashKey));
allCards.get(hashKey).addMouseMotionListener(allCards.get(hashKey));
}
}
Collections.shuffle(randomizedKeys);
return allCards;
}
private FreeCellGame placeCardsOnBoard(FreeCellGame projectBoard)
{
int x = 0;
int y = 540;
int count = 0;
for(String newRandomKey : randomizedKeys)
{
System.out.println(newRandomKey);
if(count == 7 || count == 14 || count == 21)
{
x+=150;
y=540;
}
else if( count == 28 || count == 34 || count == 40 || count == 46)
{
x+=150;
y=500;
}
else if (count != 0)
{
y-=40;
}
allCards.get(newRandomKey).setBounds(x, y, 150, 150);
projectBoard.add(allCards.get(newRandomKey));
count++;
}
return projectBoard;
}
@Override
public void mouseDragged(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseClicked(MouseEvent e) {
// ((CardImagePanel) e.getSource()).setComponentZOrder(projectBoard, 5000);
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}
JPanel類別:
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
@SuppressWarnings("serial")
public class CardImagePanel extends JPanel implements MouseListener, MouseMotionListener
{
private BufferedImage picture;
private char cardType;
private int cardNum;
public CardImagePanel(File newImageFile)
{
try {
picture = ImageIO.read(newImageFile);
} catch (IOException e){
e.printStackTrace();
}
cardType = newImageFile.getName().charAt(0);
String tempString = newImageFile.getName();
cardNum = Integer.parseInt(tempString.substring(1,tempString.lastIndexOf('.')));
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(picture, 0, 0, 150, 150, this);
}
public BufferedImage getPicture() {
return picture;
}
public char getCardType() {
return cardType;
}
public int getCardNum() {
return cardNum;
}
@Override
public void mouseDragged(MouseEvent e) {
this.setBounds(e.getX() + this.getX()-75, e.getY() + this.getY()-75, 150, 150);
}
@Override
public void mouseMoved(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
}
我使用的是空布局-教授的指示說不要利用任何經理或外部布局幫助。 (啊)
因此,基本上,您需要編寫自己的布局管理器。
下面是我的代碼。 沒有辦法在null布局上執行此操作嗎?
空布局不會影響Z-Ordering的工作方式。 Z-Ordering將自動為您完成。 關鍵是將組件添加到面板的順序,以便獲得所需的Z順序。
我正在嘗試使z索引可變。
將組件添加到面板將影響Z順序。
查看Overlap Layout ,這是專門為此設計的布局管理器。 我知道您不能使用布局管理器,但是更好地了解Z-Order的工作原理將使您可以輕松地編寫代碼。
例如,查看下面的簡單代碼。 通過簡單地玩您使用哪種add(...)
方法將卡片添加到面板中,就可以控制Z順序以發揮自己的優勢:
import java.awt.*;
import java.util.*;
import javax.swing.*;
public class SSCCE extends JPanel
{
ArrayList<JLabel> cards = new ArrayList<JLabel>();
public SSCCE()
{
setLayout( null );
cards.add( createCard("1", Color.RED) );
cards.add( createCard("2", Color.GREEN) );
cards.add( createCard("3", Color.BLUE) );
cards.add( createCard("4", Color.YELLOW) );
// This would be your first natural attempt (but it doesn't work)
for (int i = 0; i < cards.size(); i++)
add( cards.get(i) );
// This affects the Z-Order to do what you want
// for (int i = 0; i < cards.size(); i++)
// add(cards.get(i), 0);
}
public JLabel createCard(String text, Color background)
{
JLabel label = new JLabel(text);
label.setOpaque( true );
label.setBackground( background );
label.setSize(30, 70);
label.setLocation((cards.size() + 1) * 20 , 20);
return label;
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("SSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new SSCCE());
frame.setLocationByPlatform( true );
frame.setSize(200, 200);
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
我不經常支持null
布局,我認為其中有一些用例確實有用,但是,您認為這是其中一種情況,因此我強烈建議使用JLayeredPane
,因為它將允許您控制組件的z順序。
看看如何使用分層窗格了解更多詳細信息
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