[英]JButton disappears when GUI is clicked
我正在用Java進行檢查,當我單擊GUI時,“新游戲”按鈕消失了。 當我將鼠標懸停在它上面時,它會重新出現,但是如果單擊GUI,它將再次消失。 你知道我做錯了/我做錯了嗎?
public void setFrame()
{
boardSize = 10;
squareSize = 50;
int imageSize = boardSize * squareSize;
image = new BufferedImage(imageSize, imageSize, BufferedImage.TYPE_INT_ARGB);
imageIcon = new ImageIcon(image);
jLabel = new JLabel(imageIcon);
button = new JButton("New Game");
button.setFocusable(false);
button.setBounds(375, 5, 100, 20);
pnl = new JPanel();
pnl.setBounds(400, 10, 200, 100);
pnl.setLayout(null);
pnl.add(button);
jFrame = new JFrame("Checker Board");
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jFrame.add(jLabel, BorderLayout.CENTER);
jFrame.add(pnl);
jFrame.setSize(506, 558);
jFrame.setResizable(false);
jFrame.setLocationRelativeTo(null);
jFrame.setVisible(true);
jFrame.validate();
}
/**
* Paint the checker board onto the Image.
*/
public void paint()
{
Graphics graphics = jFrame.getGraphics();
pnl.paint(graphics);
button.paint(graphics);
graphics.setColor(Color.black);
Font font = new Font("Score", Font.BOLD, 20);
graphics.setFont(font);
graphics.drawString("Score: ", 150, 47);
graphics.drawString("Turn: ", 20, 47);
graphics.setFont(font.deriveFont(0, 16.0F));
graphics.drawString("Red: " + Game.score.getScoreRed() + " Black: " + Game.score.getScoreBlack(), 230, 47);
graphics.drawString((Game.redTurn ? "Red" : "Black"), 80, 47);
// paint a red board
graphics.setColor(Color.red);
graphics.fillRect(xShift, zShift, boardSize * squareSize, boardSize * squareSize);
// paint the black squares
graphics.setColor(Color.black);
for (int row = 0; row < boardSize; row++)
{
for (int col = row % 2; col < boardSize; col += 2)
{
graphics.fillRect( row * squareSize + xShift, col * squareSize + zShift, squareSize, squareSize );
}
}
for(int i = 0; i < 10; i++)
{
for(int j = 0; j < 10; j++)
{
if(Game.board.pieces[i][j] != null)
{
Color pieceColor = Game.board.pieces[i][j].getColor().equals(EnumTeam.BLACK) ? Color.gray : Color.pink;
graphics.setColor(pieceColor);
graphics.fillOval((i * 50) + 10 + xShift, (j * 50) + 10 + zShift, 30, 30);
if(Game.board.pieces[i][j].isKing())
{
pieceColor = Game.board.pieces[i][j].getColor().equals(EnumTeam.BLACK) ? Color.darkGray : Color.magenta;
graphics.setColor(pieceColor);
graphics.fillOval((i * 50) + 20 + xShift, (j * 50) + 20 + zShift, 10, 10);
}
}
}
}
graphics.setColor(Color.cyan);
drawRect(graphics, Game.board.getSelectedX(), Game.board.getSelectedZ(), 5);
}
永遠不要使用Graphics graphics = jFrame.getGraphics();
(或通常的getGraphics
)! 這不是在Swing中完成自定義繪畫的方式。 然后清除圖形上下文的事實是您的核心問題。
所有繪畫都應在繪畫API的上下文中完成,最好是從擴展JComponent
任何組件中重寫paintComponent
(我個人更喜歡JPanel
)
創建一個自定義組件並使用它執行自定義繪制。 將其與框架上的其他組件一起布置。
設置“ 在AWT和Swing中 執行自定義繪畫和繪畫”,以獲取有關繪畫如何在Swing中工作的更多詳細信息。
MouseListener
並不是真正適合用於按鈕的偵聽器,更好的選擇是使用考慮到鼠標單擊和鍵盤事件的ActionListener
。
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