Java JLabel.getWidth方法代码示例

import javax.swing.JLabel; //导入方法依赖的package包/类
private static HashSet getAntialiasedColors(Object aaHint, int lcdContrast) {

        JLabel label = new JLabel("ABCD");
        label.setSize(label.getPreferredSize());
        label.putClientProperty(KEY_TEXT_ANTIALIASING, aaHint);
        label.putClientProperty(KEY_TEXT_LCD_CONTRAST, lcdContrast);

        int w = label.getWidth();
        int h = label.getHeight();

        BufferedImage buffImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = buffImage.createGraphics();
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, w, h);
        label.paint(g);
        g.dispose();

        HashSet<Color> colors = new HashSet<>();

        for (int i = 0; i < w; i++) {
            for (int j = 0; j < h; j++) {
                Color color = new Color(buffImage.getRGB(i, j));
                colors.add(color);
            }
        }

        return colors;
    }
 

import javax.swing.JLabel; //导入方法依赖的package包/类
/**
 * Scales the given image to fit the label dimensions.
 * @param bImage: The image to fit.
 * @param label: The label to display the image.
 */
private void scaleAndShowImage(BufferedImage bImage, JLabel label) {
    int bImageHeight = bImage.getHeight();
    int bImageWidth = bImage.getWidth();
    int labelHeight = label.getHeight();
    int labelWidth = label.getWidth();
    
    // Does this need to be scaled?
    if (labelHeight >= bImageHeight && labelWidth >= bImageWidth) {
        // If not, display the image and return.
        ImageIcon image = new ImageIcon(bImage);
        label.setIcon(image);
        return;
    }
    
    // Calculate the new width and height for the image.
    int newHeight;
    int newWidth;
    double bImageAspect = (double)bImageHeight / (double)bImageWidth;
    double labelAspect = (double)labelHeight / (double)labelWidth;
    
    if (bImageAspect > labelAspect) {
        newHeight = labelHeight;
        newWidth = (int)(((double)labelHeight / (double)bImageHeight) * (double)bImageWidth);
    } else {
        newWidth = labelWidth;
        newHeight = (int)(((double)labelWidth / (double)bImageWidth) * (double)bImageHeight);
    }
    
    // Create a new image scaled to the correct size.
    Image newImage = bImage.getScaledInstance(newWidth, newHeight, Image.SCALE_SMOOTH);
    
    // Display the scaled image.
    ImageIcon labelImage = new ImageIcon(newImage);
    label.setIcon(labelImage);
    label.validate();
    label.repaint();
}
 

import javax.swing.JLabel; //导入方法依赖的package包/类
/**
 * Aplicar uma textura como plano de fundo no JLabel passado por parâmetro
 * @param textura imagem da textura a ser aplicada
 * @param label label que receberá a textura
 */
public static void aplicarTextura(ImageIcon textura, JLabel label) {
    BufferedImage bi = Img.ImageIconToBufferedImage(textura);
    BufferedImage bi2 = new BufferedImage(label.getWidth(), label.getHeight(), BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2 = (Graphics2D) bi2.getGraphics();
    Rectangle r = new Rectangle(0, 0, bi.getWidth(), bi.getHeight());
    g2.setPaint(new TexturePaint(bi, r));
    Rectangle rect = new Rectangle(0, 0, label.getWidth(), label.getHeight());
    g2.fill(rect);
    g2.dispose();
    label.setIcon(new ImageIcon(bi2));
}
 

import javax.swing.JLabel; //导入方法依赖的package包/类
/**
 * {@inheritDoc}
 */
@Override
public void executeWithUnitOutForAnimation(JLabel unitLabel) {
    final SwingGUI gui = (SwingGUI)getGUI();
    final float scale = gui.getMapScale();
    final int movementRatio = (int)(Math.pow(2, this.speed + 1) * scale);
    final Rectangle r1 = gui.getTileBounds(this.sourceTile);
    final Rectangle r2 = gui.getTileBounds(this.destinationTile);
    final Rectangle bounds = r1.union(r2);
    final double xratio = ImageLibrary.TILE_SIZE.width
        / (double)ImageLibrary.TILE_SIZE.height;

    // Tile positions should be valid at this point.
    final Point srcP = gui.getTilePosition(this.sourceTile);
    if (srcP == null) {
        logger.warning("Failed move animation for " + this.unit
            + " at source tile: " + this.sourceTile);
        return;
    }
    final Point dstP = gui.getTilePosition(this.destinationTile);
    if (dstP == null) {
        logger.warning("Failed move animation for " + this.unit
            + " at destination tile: " + this.destinationTile);
        return;
    }
        
    final int labelWidth = unitLabel.getWidth();
    final int labelHeight = unitLabel.getHeight();
    final Point srcPoint = gui.calculateUnitLabelPositionInTile(labelWidth,
        labelHeight, srcP);
    final Point dstPoint = gui.calculateUnitLabelPositionInTile(labelWidth,
        labelHeight, dstP);
    final int stepX = (srcPoint.getX() == dstPoint.getX()) ? 0
        : (srcPoint.getX() > dstPoint.getX()) ? -1 : 1;
    final int stepY = (srcPoint.getY() == dstPoint.getY()) ? 0
        : (srcPoint.getY() > dstPoint.getY()) ? -1 : 1;

    int dropFrames = 0;
    Point point = srcPoint;
    while (!point.equals(dstPoint)) {
        long time = System.currentTimeMillis();
        point.x += stepX * xratio * movementRatio;
        point.y += stepY * movementRatio;
        if ((stepX < 0 && point.x < dstPoint.x)
            || (stepX > 0 && point.x > dstPoint.x)) {
            point.x = dstPoint.x;
        }
        if ((stepY < 0 && point.y < dstPoint.y)
            || (stepY > 0 && point.y > dstPoint.y)) {
            point.y = dstPoint.y;
        }
        if (dropFrames <= 0) {
            unitLabel.setLocation(point);
            gui.paintImmediatelyCanvasIn(bounds);
            int timeTaken = (int)(System.currentTimeMillis()-time);
            final int waitTime = ANIMATION_DELAY - timeTaken;
            if (waitTime > 0) {
                Utils.delay(waitTime, "Animation interrupted.");
                dropFrames = 0;
            } else {
                dropFrames = timeTaken / ANIMATION_DELAY - 1;
            }
        } else {
            dropFrames--;
        }
    }
    gui.refresh();
}