我在從屏外JPanel創建BufferedImage時遇到了問題。具體來說,我正在嘗試繪製一個JPanel(包含一些Java3D元素)的圖像作爲我正在處理的應用程序的背景圖像。獲取JPanel的圖像
我發現了幾個線程描述瞭如何通過將JPanel繪製到BufferedImage的圖形上下文來獲得JPanel的圖像,但是當我繪製BufferedImage時,我得到的只是一個大的白色矩形。
這裏是我的代碼:
SimpleWorld j3DPanel; // a custom JPanel that contains some simple Java3D elements
// CONSTRUCTOR
public GameBackgroundObject()
{
super();
// Here I set up a JPanel that contains some Java3D elements.
j3DPanel = new SimpleWorld();
j3DPanel.setSize(mainLevel.SCREENW, mainLevel.SCREENH);
j3DPanel.setBounds(0,0,mainLevel.SCREENW, mainLevel.SCREENH);
j3DPanel.doLayout();
j3DPanel.validate();
}
protected void draw(Graphics2D parentComponentGraphics, ...)
{
super.draw(parentComponentGraphics, ...);
int w = j3DPanel.getWidth();
int h = j3DPanel.getHeight();
BufferedImage j3DImg = new BufferedImage(w,h,BufferedImage.TYPE_INT_ARGB);
Graphics2D g = j3DImg.createGraphics();
j3DPanel.paint(g);
parentComponentGraphics.drawImage(j3DImg, null, null);
}
而且,我試着將我的JPanel到JFrame的內容。它在那裏工作並正確顯示呈現的Java3D元素。但是,只要我嘗試獲取JPanel的BufferedImage並繪製該圖像,我就會得到這個大的白色矩形。
我會在稍後看看。謝謝! – Cazra