Java RectangleEdge.LEFT属性代码示例

/**
 * Adds a block to the arrangement manager at the specified edge.
 * If the key is not an instance of {@link RectangleEdge} the block will
 * be added in the center.
 *
 * @param block  the block ({@code null} permitted).
 * @param key  the edge (an instance of {@link RectangleEdge}) or
 *             {@code null} for the center block.
 */
@Override
public void add(Block block, Object key) {

    if (!(key instanceof RectangleEdge)) { // catches null also
        this.centerBlock = block;
    }
    else {
        RectangleEdge edge = (RectangleEdge) key;
        if (edge == RectangleEdge.TOP) {
            this.topBlock = block;
        }
        else if (edge == RectangleEdge.BOTTOM) {
            this.bottomBlock = block;
        }
        else if (edge == RectangleEdge.LEFT) {
            this.leftBlock = block;
        }
        else if (edge == RectangleEdge.RIGHT) {
            this.rightBlock = block;
        }
    }
}
 

/**
 * Adds space to the top, bottom, left or right edge of the plot area.
 *
 * @param space  the space (in Java2D units).
 * @param edge  the edge ({@code null} not permitted).
 */
public void add(double space, RectangleEdge edge) {
    Args.nullNotPermitted(edge, "edge");
    if (edge == RectangleEdge.TOP) {
        this.top += space;
    }
    else if (edge == RectangleEdge.BOTTOM) {
        this.bottom += space;
    }
    else if (edge == RectangleEdge.LEFT) {
        this.left += space;
    }
    else if (edge == RectangleEdge.RIGHT) {
        this.right += space;
    }
    else {
        throw new IllegalStateException("Unrecognised 'edge' argument.");
    }
}
 

/**
 * Draws an axis line at the current cursor position and edge.
 *
 * @param g2  the graphics device.
 * @param cursor  the cursor position.
 * @param dataArea  the data area.
 * @param edge  the edge.
 */
protected void drawAxisLine(Graphics2D g2, double cursor,
        Rectangle2D dataArea, RectangleEdge edge) {
    Line2D axisLine = null;
    double x = dataArea.getX();
    double y = dataArea.getY();
    if (edge == RectangleEdge.TOP) {
        axisLine = new Line2D.Double(x, cursor, dataArea.getMaxX(), cursor);
    } else if (edge == RectangleEdge.BOTTOM) {
        axisLine = new Line2D.Double(x, cursor, dataArea.getMaxX(), cursor);
    } else if (edge == RectangleEdge.LEFT) {
        axisLine = new Line2D.Double(cursor, y, cursor, dataArea.getMaxY());
    } else if (edge == RectangleEdge.RIGHT) {
        axisLine = new Line2D.Double(cursor, y, cursor, dataArea.getMaxY());
    }
    g2.setPaint(this.axisLinePaint);
    g2.setStroke(this.axisLineStroke);
    Object saved = g2.getRenderingHint(RenderingHints.KEY_STROKE_CONTROL);
    g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, 
            RenderingHints.VALUE_STROKE_NORMALIZE);
    g2.draw(axisLine);
    g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, saved);
}
 

/**
 * Returns the starting coordinate for the specified category.
 *
 * @param category  the category.
 * @param categoryCount  the number of categories.
 * @param area  the data area.
 * @param edge  the axis location.
 *
 * @return The coordinate.
 *
 * @see #getCategoryMiddle(int, int, Rectangle2D, RectangleEdge)
 * @see #getCategoryEnd(int, int, Rectangle2D, RectangleEdge)
 */
public double getCategoryStart(int category, int categoryCount, 
        Rectangle2D area, RectangleEdge edge) {

    double result = 0.0;
    if ((edge == RectangleEdge.TOP) || (edge == RectangleEdge.BOTTOM)) {
        result = area.getX() + area.getWidth() * getLowerMargin();
    }
    else if ((edge == RectangleEdge.LEFT)
            || (edge == RectangleEdge.RIGHT)) {
        result = area.getMinY() + area.getHeight() * getLowerMargin();
    }

    double categorySize = calculateCategorySize(categoryCount, area, edge);
    double categoryGapWidth = calculateCategoryGapSize(categoryCount, area,
            edge);

    result = result + category * (categorySize + categoryGapWidth);
    return result;
}
 

/**
 * Returns the category label position specification for an axis at the
 * given location.
 *
 * @param edge  the axis location.
 *
 * @return The category label position specification.
 */
public CategoryLabelPosition getLabelPosition(RectangleEdge edge) {
    CategoryLabelPosition result = null;
    if (edge == RectangleEdge.TOP) {
        result = this.positionForAxisAtTop;
    }
    else if (edge == RectangleEdge.BOTTOM) {
        result = this.positionForAxisAtBottom;
    }
    else if (edge == RectangleEdge.LEFT) {
        result = this.positionForAxisAtLeft;
    }
    else if (edge == RectangleEdge.RIGHT) {
        result = this.positionForAxisAtRight;
    }
    return result;
}
 

/**
 * Calculates the anchor point for a tick label.
 *
 * @param tick  the tick.
 * @param cursor  the cursor.
 * @param dataArea  the data area.
 * @param edge  the edge on which the axis is drawn.
 *
 * @return The x and y coordinates of the anchor point.
 */
protected float[] calculateAnchorPoint(ValueTick tick, double cursor,
        Rectangle2D dataArea, RectangleEdge edge) {

    RectangleInsets insets = getTickLabelInsets();
    float[] result = new float[2];
    if (edge == RectangleEdge.TOP) {
        result[0] = (float) valueToJava2D(tick.getValue(), dataArea, edge);
        result[1] = (float) (cursor - insets.getBottom() - 2.0);
    }
    else if (edge == RectangleEdge.BOTTOM) {
        result[0] = (float) valueToJava2D(tick.getValue(), dataArea, edge);
        result[1] = (float) (cursor + insets.getTop() + 2.0);
    }
    else if (edge == RectangleEdge.LEFT) {
        result[0] = (float) (cursor - insets.getLeft() - 2.0);
        result[1] = (float) valueToJava2D(tick.getValue(), dataArea, edge);
    }
    else if (edge == RectangleEdge.RIGHT) {
        result[0] = (float) (cursor + insets.getRight() + 2.0);
        result[1] = (float) valueToJava2D(tick.getValue(), dataArea, edge);
    }
    return result;
}
 

/**
 * Draws the title on a Java 2D graphics device (such as the screen or a
 * printer).
 *
 * @param g2  the graphics device.
 * @param area  the area allocated for the title.
 */
@Override
public void draw(Graphics2D g2, Rectangle2D area) {
    RectangleEdge position = getPosition();
    if (position == RectangleEdge.TOP || position == RectangleEdge.BOTTOM) {
        drawHorizontal(g2, area);
    }
    else if (position == RectangleEdge.LEFT
                 || position == RectangleEdge.RIGHT) {
        drawVertical(g2, area);
    }
    else {
        throw new RuntimeException("Invalid title position.");
    }
}
 

/**
 * Draws a the title vertically within the specified area.  This method
 * will be called from the {@link #draw(Graphics2D, Rectangle2D) draw}
 * method.
 *
 * @param g2  the graphics device.
 * @param area  the area for the title.
 */
protected void drawVertical(Graphics2D g2, Rectangle2D area) {
    Rectangle2D titleArea = (Rectangle2D) area.clone();
    g2.setFont(this.font);
    g2.setPaint(this.paint);
    TextBlockAnchor anchor = null;
    float y = 0.0f;
    VerticalAlignment verticalAlignment = getVerticalAlignment();
    if (verticalAlignment == VerticalAlignment.TOP) {
        y = (float) titleArea.getY();
        anchor = TextBlockAnchor.TOP_RIGHT;
    }
    else if (verticalAlignment == VerticalAlignment.BOTTOM) {
        y = (float) titleArea.getMaxY();
        anchor = TextBlockAnchor.TOP_LEFT;
    }
    else if (verticalAlignment == VerticalAlignment.CENTER) {
        y = (float) titleArea.getCenterY();
        anchor = TextBlockAnchor.TOP_CENTER;
    }
    float x = 0.0f;
    RectangleEdge position = getPosition();
    if (position == RectangleEdge.LEFT) {
        x = (float) titleArea.getX();
    }
    else if (position == RectangleEdge.RIGHT) {
        x = (float) titleArea.getMaxX();
        if (verticalAlignment == VerticalAlignment.TOP) {
            anchor = TextBlockAnchor.BOTTOM_RIGHT;
        }
        else if (verticalAlignment == VerticalAlignment.CENTER) {
            anchor = TextBlockAnchor.BOTTOM_CENTER;
        }
        else if (verticalAlignment == VerticalAlignment.BOTTOM) {
            anchor = TextBlockAnchor.BOTTOM_LEFT;
        }
    }
    this.content.draw(g2, x, y, anchor, x, y, -Math.PI / 2.0);
}
 

/**
 * Adjusts the supplied x-value.
 *
 * @param x  the x-value.
 * @param w1  width 1.
 * @param w2  width 2.
 * @param edge  the edge (left or right).
 *
 * @return The adjusted x-value.
 */
protected double getRectX(double x, double w1, double w2,
                          RectangleEdge edge) {

    double result = x;
    if (edge == RectangleEdge.LEFT) {
        result = result + w1;
    }
    else if (edge == RectangleEdge.RIGHT) {
        result = result + w2;
    }
    return result;

}
 

/**
 * Ensures there is a minimum amount of space at the edge corresponding to
 * the specified axis location.
 *
 * @param space  the space.
 * @param edge  the location.
 */
public void ensureAtLeast(double space, RectangleEdge edge) {
    if (edge == RectangleEdge.TOP) {
        if (this.top < space) {
            this.top = space;
        }
    }
    else if (edge == RectangleEdge.BOTTOM) {
        if (this.bottom < space) {
            this.bottom = space;
        }
    }
    else if (edge == RectangleEdge.LEFT) {
        if (this.left < space) {
            this.left = space;
        }
    }
    else if (edge == RectangleEdge.RIGHT) {
        if (this.right < space) {
            this.right = space;
        }
    }
    else {
        throw new IllegalStateException(
            "AxisSpace.ensureAtLeast(): unrecognised AxisLocation."
        );
    }
}
 

/**
 * Calculates the reserved area.
 *
 * @param area  the area.
 * @param edge  the edge.
 *
 * @return The reserved area.
 */
public Rectangle2D reserved(Rectangle2D area, RectangleEdge edge) {
    Rectangle2D result = null;
    if (edge == RectangleEdge.TOP) {
        result = new Rectangle2D.Double(
            area.getX(), area.getY(), area.getWidth(), this.top
        );
    }
    else if (edge == RectangleEdge.BOTTOM) {
        result = new Rectangle2D.Double(
            area.getX(), area.getMaxY() - this.top,
            area.getWidth(), this.bottom
        );
    }
    else if (edge == RectangleEdge.LEFT) {
        result = new Rectangle2D.Double(
            area.getX(), area.getY(), this.left, area.getHeight()
        );
    }
    else if (edge == RectangleEdge.RIGHT) {
        result = new Rectangle2D.Double(
            area.getMaxX() - this.right, area.getY(),
            this.right, area.getHeight()
        );
    }
    return result;
}
 

/**
 * Returns a rectangle that encloses the axis label.  This is typically
 * used for layout purposes (it gives the maximum dimensions of the label).
 *
 * @param g2  the graphics device.
 * @param edge  the edge of the plot area along which the axis is measuring.
 *
 * @return The enclosing rectangle.
 */
protected Rectangle2D getLabelEnclosure(Graphics2D g2, RectangleEdge edge) {
    Rectangle2D result = new Rectangle2D.Double();
    Rectangle2D bounds = null;
    if (this.attributedLabel != null) {
        TextLayout layout = new TextLayout(
                this.attributedLabel.getIterator(), 
                g2.getFontRenderContext());
        bounds = layout.getBounds();
    } else {
        String axisLabel = getLabel();
        if (axisLabel != null && !axisLabel.equals("")) {
            FontMetrics fm = g2.getFontMetrics(getLabelFont());
            bounds = TextUtils.getTextBounds(axisLabel, g2, fm);
        }
    }
    if (bounds != null) {
        RectangleInsets insets = getLabelInsets();
        bounds = insets.createOutsetRectangle(bounds);
        double angle = getLabelAngle();
        if (edge == RectangleEdge.LEFT || edge == RectangleEdge.RIGHT) {
            angle = angle - Math.PI / 2.0;
        }
        double x = bounds.getCenterX();
        double y = bounds.getCenterY();
        AffineTransform transformer
            = AffineTransform.getRotateInstance(angle, x, y);
        Shape labelBounds = transformer.createTransformedShape(bounds);
        result = labelBounds.getBounds2D();
    }
    return result;
}
 

/**
 * Draws the tick marks and labels.
 *
 * @param g2  the graphics device.
 * @param cursor  the cursor.
 * @param plotArea  the plot area.
 * @param dataArea  the area inside the axes.
 * @param edge  the side on which the axis is displayed.
 *
 * @return The axis state.
 */
@Override
protected AxisState drawTickMarksAndLabels(Graphics2D g2, double cursor,
        Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge) {
    this.internalMarkerWhenTicksOverlap = false;
    AxisState ret = super.drawTickMarksAndLabels(g2, cursor, plotArea,
            dataArea, edge);

    // continue and separate the labels only if necessary
    if (!this.internalMarkerWhenTicksOverlap) {
        return ret;
    }

    double ol;
    FontMetrics fm = g2.getFontMetrics(getTickLabelFont());
    if (isVerticalTickLabels()) {
        ol = fm.getMaxAdvance();
    }
    else {
        ol = fm.getHeight();
    }

    double il = 0;
    if (isTickMarksVisible()) {
        float xx = (float) valueToJava2D(getRange().getUpperBound(),
                dataArea, edge);
        Line2D mark = null;
        g2.setStroke(getTickMarkStroke());
        g2.setPaint(getTickMarkPaint());
        if (edge == RectangleEdge.LEFT) {
            mark = new Line2D.Double(cursor - ol, xx, cursor + il, xx);
        }
        else if (edge == RectangleEdge.RIGHT) {
            mark = new Line2D.Double(cursor + ol, xx, cursor - il, xx);
        }
        else if (edge == RectangleEdge.TOP) {
            mark = new Line2D.Double(xx, cursor - ol, xx, cursor + il);
        }
        else if (edge == RectangleEdge.BOTTOM) {
            mark = new Line2D.Double(xx, cursor + ol, xx, cursor - il);
        }
        g2.draw(mark);
    }
    return ret;
}
 

/**
 * Creates a temporary list of ticks that can be used when drawing the axis.
 *
 * @param g2  the graphics device (used to get font measurements).
 * @param state  the axis state.
 * @param dataArea  the area inside the axes.
 * @param edge  the location of the axis.
 *
 * @return A list of ticks.
 */
@Override
public List refreshTicks(Graphics2D g2, AxisState state, 
        Rectangle2D dataArea, RectangleEdge edge) {

    List ticks = new java.util.ArrayList();

    // sanity check for data area...
    if (dataArea.getHeight() <= 0.0 || dataArea.getWidth() < 0.0) {
        return ticks;
    }

    CategoryPlot plot = (CategoryPlot) getPlot();
    List categories = plot.getCategoriesForAxis(this);
    double max = 0.0;

    if (categories != null) {
        CategoryLabelPosition position
                = this.categoryLabelPositions.getLabelPosition(edge);
        float r = this.maximumCategoryLabelWidthRatio;
        if (r <= 0.0) {
            r = position.getWidthRatio();
        }

        float l;
        if (position.getWidthType() == CategoryLabelWidthType.CATEGORY) {
            l = (float) calculateCategorySize(categories.size(), dataArea,
                    edge);
        }
        else {
            if (RectangleEdge.isLeftOrRight(edge)) {
                l = (float) dataArea.getWidth();
            }
            else {
                l = (float) dataArea.getHeight();
            }
        }
        int categoryIndex = 0;
        Iterator iterator = categories.iterator();
        while (iterator.hasNext()) {
            Comparable category = (Comparable) iterator.next();
            g2.setFont(getTickLabelFont(category));
            TextBlock label = createLabel(category, l * r, edge, g2);
            if (edge == RectangleEdge.TOP || edge == RectangleEdge.BOTTOM) {
                max = Math.max(max, calculateTextBlockHeight(label,
                        position, g2));
            }
            else if (edge == RectangleEdge.LEFT
                    || edge == RectangleEdge.RIGHT) {
                max = Math.max(max, calculateTextBlockWidth(label,
                        position, g2));
            }
            Tick tick = new CategoryTick(category, label,
                    position.getLabelAnchor(),
                    position.getRotationAnchor(), position.getAngle());
            ticks.add(tick);
            categoryIndex = categoryIndex + 1;
        }
    }
    state.setMax(max);
    return ticks;

}
 

/**
 * Creates a shadow for the bar.
 *
 * @param bar  the bar shape.
 * @param xOffset  the x-offset for the shadow.
 * @param yOffset  the y-offset for the shadow.
 * @param base  the edge that is the base of the bar.
 * @param pegShadow  peg the shadow to the base?
 *
 * @return A rectangle for the shadow.
 */
private Rectangle2D createShadow(RectangularShape bar, double xOffset,
        double yOffset, RectangleEdge base, boolean pegShadow) {
    double x0 = bar.getMinX();
    double x1 = bar.getMaxX();
    double y0 = bar.getMinY();
    double y1 = bar.getMaxY();
    if (base == RectangleEdge.TOP) {
        x0 += xOffset;
        x1 += xOffset;
        if (!pegShadow) {
            y0 += yOffset;
        }
        y1 += yOffset;
    }
    else if (base == RectangleEdge.BOTTOM) {
        x0 += xOffset;
        x1 += xOffset;
        y0 += yOffset;
        if (!pegShadow) {
            y1 += yOffset;
        }
    }
    else if (base == RectangleEdge.LEFT) {
        if (!pegShadow) {
            x0 += xOffset;
        }
        x1 += xOffset;
        y0 += yOffset;
        y1 += yOffset;
    }
    else if (base == RectangleEdge.RIGHT) {
        x0 += xOffset;
        if (!pegShadow) {
            x1 += xOffset;
        }
        y0 += yOffset;
        y1 += yOffset;
    }
    return new Rectangle2D.Double(x0, y0, (x1 - x0), (y1 - y0));
}