Java RectangleAnchor.TOP_LEFT屬性代碼示例

/**
 * Constructs a new marker.
 *
 * @param paint  the paint (<code>null</code> not permitted).
 * @param stroke  the stroke (<code>null</code> not permitted).
 * @param outlinePaint  the outline paint (<code>null</code> permitted).
 * @param outlineStroke  the outline stroke (<code>null</code> permitted).
 * @param alpha  the alpha transparency.
 */
public Marker(Paint paint, Stroke stroke, 
              Paint outlinePaint, Stroke outlineStroke, 
              float alpha) {

    if (paint == null) {
        throw new IllegalArgumentException("Null 'paint' argument.");
    }
    if (stroke == null) {
        throw new IllegalArgumentException("Null 'stroke' argument.");
    }
    
    this.paint = paint;
    this.stroke = stroke;
    this.outlinePaint = outlinePaint;
    this.outlineStroke = outlineStroke;
    this.alpha = alpha;
    
    this.labelFont = new Font("SansSerif", Font.PLAIN, 9);
    this.labelPaint = Color.black;
    this.labelAnchor = RectangleAnchor.TOP_LEFT;
    this.labelOffset = new RectangleInsets(UnitType.ABSOLUTE, 3.0, 3.0, 3.0, 3.0);
    this.labelTextAnchor = TextAnchor.CENTER;
    
}
 

private RectangleAnchor flipAnchorH(RectangleAnchor anchor) {
    RectangleAnchor result = anchor;
    if (anchor.equals(RectangleAnchor.TOP_LEFT)) {
        result = RectangleAnchor.TOP_RIGHT;
    }
    else if (anchor.equals(RectangleAnchor.TOP_RIGHT)) {
        result = RectangleAnchor.TOP_LEFT;
    }
    else if (anchor.equals(RectangleAnchor.LEFT)) {
        result = RectangleAnchor.RIGHT;
    }
    else if (anchor.equals(RectangleAnchor.RIGHT)) {
        result = RectangleAnchor.LEFT;
    }
    else if (anchor.equals(RectangleAnchor.BOTTOM_LEFT)) {
        result = RectangleAnchor.BOTTOM_RIGHT;
    }
    else if (anchor.equals(RectangleAnchor.BOTTOM_RIGHT)) {
        result = RectangleAnchor.BOTTOM_LEFT;
    }
    return result;
}
 

private RectangleAnchor flipAnchorV(RectangleAnchor anchor) {
    RectangleAnchor result = anchor;
    if (anchor.equals(RectangleAnchor.TOP_LEFT)) {
        result = RectangleAnchor.BOTTOM_LEFT;
    }
    else if (anchor.equals(RectangleAnchor.TOP_RIGHT)) {
        result = RectangleAnchor.BOTTOM_RIGHT;
    }
    else if (anchor.equals(RectangleAnchor.TOP)) {
        result = RectangleAnchor.BOTTOM;
    }
    else if (anchor.equals(RectangleAnchor.BOTTOM)) {
        result = RectangleAnchor.TOP;
    }
    else if (anchor.equals(RectangleAnchor.BOTTOM_LEFT)) {
        result = RectangleAnchor.TOP_LEFT;
    }
    else if (anchor.equals(RectangleAnchor.BOTTOM_RIGHT)) {
        result = RectangleAnchor.TOP_RIGHT;
    }
    return result;
}
 

/**
 * Constructs a new marker.
 *
 * @param paint  the paint (<code>null</code> not permitted).
 * @param stroke  the stroke (<code>null</code> not permitted).
 * @param outlinePaint  the outline paint (<code>null</code> permitted).
 * @param outlineStroke  the outline stroke (<code>null</code> permitted).
 * @param alpha  the alpha transparency (must be in the range 0.0f to 
 *     1.0f).
 *     
 * @throws IllegalArgumentException if <code>paint</code> or 
 *     <code>stroke</code> is <code>null</code>, or <code>alpha</code> is 
 *     not in the specified range.
 */
protected Marker(Paint paint, Stroke stroke, 
                 Paint outlinePaint, Stroke outlineStroke, 
                 float alpha) {

    if (paint == null) {
        throw new IllegalArgumentException("Null 'paint' argument.");
    }
    if (stroke == null) {
        throw new IllegalArgumentException("Null 'stroke' argument.");
    }
    if (alpha < 0.0f || alpha > 1.0f)
        throw new IllegalArgumentException(
                "The 'alpha' value must be in the range 0.0f to 1.0f");
    
    this.paint = paint;
    this.stroke = stroke;
    this.outlinePaint = outlinePaint;
    this.outlineStroke = outlineStroke;
    this.alpha = alpha;
    
    this.labelFont = new Font("SansSerif", Font.PLAIN, 9);
    this.labelPaint = Color.black;
    this.labelAnchor = RectangleAnchor.TOP_LEFT;
    this.labelOffset = new RectangleInsets(3.0, 3.0, 3.0, 3.0);
    this.labelOffsetType = LengthAdjustmentType.CONTRACT;
    this.labelTextAnchor = TextAnchor.CENTER;
    
    this.listenerList = new EventListenerList();
}
 

/**
 * Constructs a new marker.
 *
 * @param paint  the paint ({@code null} not permitted).
 * @param stroke  the stroke ({@code null} not permitted).
 * @param outlinePaint  the outline paint ({@code null} permitted).
 * @param outlineStroke  the outline stroke ({@code null} permitted).
 * @param alpha  the alpha transparency (must be in the range 0.0f to
 *     1.0f).
 *
 * @throws IllegalArgumentException if {@code paint} or
 *     {@code stroke} is {@code null}, or {@code alpha} is
 *     not in the specified range.
 */
protected Marker(Paint paint, Stroke stroke, Paint outlinePaint, 
        Stroke outlineStroke, float alpha) {

    ParamChecks.nullNotPermitted(paint, "paint");
    ParamChecks.nullNotPermitted(stroke, "stroke");
    if (alpha < 0.0f || alpha > 1.0f) {
        throw new IllegalArgumentException(
                "The 'alpha' value must be in the range 0.0f to 1.0f");
    }

    this.paint = paint;
    this.stroke = stroke;
    this.outlinePaint = outlinePaint;
    this.outlineStroke = outlineStroke;
    this.alpha = alpha;

    this.labelFont = new Font("SansSerif", Font.PLAIN, 9);
    this.labelPaint = Color.black;
    this.labelBackgroundColor = new Color(100, 100, 100, 100);
    this.labelAnchor = RectangleAnchor.TOP_LEFT;
    this.labelOffset = new RectangleInsets(3.0, 3.0, 3.0, 3.0);
    this.labelOffsetType = LengthAdjustmentType.CONTRACT;
    this.labelTextAnchor = TextAnchor.CENTER;

    this.listenerList = new EventListenerList();
}
 

/**
 * Calculates the anchor point for a label.
 *
 * @param line  the line for the crosshair.
 * @param anchor  the anchor point.
 * @param deltaX  the x-offset.
 * @param deltaY  the y-offset.
 *
 * @return The anchor point.
 */
private Point2D calculateLabelPoint(Line2D line, RectangleAnchor anchor,
        double deltaX, double deltaY) {
    double x, y;
    boolean left = (anchor == RectangleAnchor.BOTTOM_LEFT 
            || anchor == RectangleAnchor.LEFT 
            || anchor == RectangleAnchor.TOP_LEFT);
    boolean right = (anchor == RectangleAnchor.BOTTOM_RIGHT 
            || anchor == RectangleAnchor.RIGHT 
            || anchor == RectangleAnchor.TOP_RIGHT);
    boolean top = (anchor == RectangleAnchor.TOP_LEFT 
            || anchor == RectangleAnchor.TOP 
            || anchor == RectangleAnchor.TOP_RIGHT);
    boolean bottom = (anchor == RectangleAnchor.BOTTOM_LEFT
            || anchor == RectangleAnchor.BOTTOM
            || anchor == RectangleAnchor.BOTTOM_RIGHT);
    Rectangle rect = line.getBounds();
    
    // we expect the line to be vertical or horizontal
    if (line.getX1() == line.getX2()) {  // vertical
        x = line.getX1();
        y = (line.getY1() + line.getY2()) / 2.0;
        if (left) {
            x = x - deltaX;
        }
        if (right) {
            x = x + deltaX;
        }
        if (top) {
            y = Math.min(line.getY1(), line.getY2()) + deltaY;
        }
        if (bottom) {
            y = Math.max(line.getY1(), line.getY2()) - deltaY;
        }
    }
    else {  // horizontal
        x = (line.getX1() + line.getX2()) / 2.0;
        y = line.getY1();
        if (left) {
            x = Math.min(line.getX1(), line.getX2()) + deltaX;
        }
        if (right) {
            x = Math.max(line.getX1(), line.getX2()) - deltaX;
        }
        if (top) {
            y = y - deltaY;
        }
        if (bottom) {
            y = y + deltaY;
        }
    }
    return new Point2D.Double(x, y);
}