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我试图调整一个图像我已经绘制到ImagePanel(扩展JPanel),它似乎并没有工作。我从互联网上得到了一些覆盖组件paint()方法的示例代码,我想这可能是问题,这是我的代码。Java Swing:调整JPanel的大小与图像
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (img != null) { // Scale it by width int scaledWidth = (int)((img.getWidth() * getHeight()/img.getHeight()));
// If the image is not off the screen horizontally...
if (scaledWidth < getWidth()) {
// Center the left and right destination x coordinates.
int leftOffset = getWidth()/2 - scaledWidth/2;
int rightOffset = getWidth()/2 + scaledWidth/2;
g.drawImage(img, leftOffset, 0, rightOffset, getHeight(), 0, 0, img.getWidth(), img.getHeight(), null);
}
// Otherwise, the image width is too much, even scaled
// So we need to center it the other direction
else {
int scaledHeight = (img.getHeight() * getWidth())/img.getWidth();
int topOffset = getHeight()/2 - scaledHeight/2;
int bottomOffset = getHeight()/2 + scaledHeight/2;
g.drawImage(img, 0, topOffset, getWidth(), bottomOffset, 0, 0, img.getWidth(), img.getHeight(), null);
}
}
}
,我从调用它...
public void resetImage(double width, double height) {
BufferedImage scaledImage = new BufferedImage((int)width, (int)height,BufferedImage.TYPE_INT_ARGB);
// Paint scaled version of image to new image
Graphics2D graphics2D = scaledImage.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
this.setSize((int)img.getWidth(), (int)img.getHeight());
graphics2D.drawImage(this.img, 0, 0, (int)width, (int)height, null); graphics2D.dispose();
}
(其中宽度和高度,在此blurp是新的宽度和高度加以应用。
感谢。
什么不起作用?你期望发生什么?给我们更多的好处 - 我们不会重新创建你的环境来帮助你。 – I82Much 2011-01-13 21:34:44