mxvmlcanvas.java

经典的java图像处理程序源码

			int inset = (int) ((3 + strokeWidth) * scale);

			String points = "ar 0 0 " + w + " " + h + " 0 " + (int) (h / 2)
					+ " " + (int) (w / 2) + " " + (int) (h / 2) + " e ar "
					+ inset + " " + inset + " " + (w - inset) + " "
					+ (h - inset) + " 0 " + (int) (h / 2) + " " + (int) (w / 2)
					+ " " + (int) (h / 2);

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_RHOMBUS))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			String points = "m " + (int) (w / 2) + " 0 l " + w + " "
					+ (int) (h / 2) + " l " + (int) (w / 2) + " " + h + " l 0 "
					+ (int) (h / 2);

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_TRIANGLE))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			String direction = mxUtils.getString(style,
					mxConstants.STYLE_DIRECTION, "");
			String points = null;

			if (direction.equals(mxConstants.DIRECTION_NORTH))
			{
				points = "m 0 " + h + " l " + (int) (w / 2) + " 0 " + " l " + w
						+ " " + h;
			}
			else if (direction.equals(mxConstants.DIRECTION_SOUTH))
			{
				points = "m 0 0 l " + (int) (w / 2) + " " + h + " l " + w
						+ " 0";
			}
			else if (direction.equals(mxConstants.DIRECTION_WEST))
			{
				points = "m " + w + " 0 l " + w + " " + (int) (h / 2) + " l "
						+ w + " " + h;
			}
			else
			// east
			{
				points = "m 0 0 l " + w + " " + (int) (h / 2) + " l 0 " + h;
			}

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_HEXAGON))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			String direction = mxUtils.getString(style,
					mxConstants.STYLE_DIRECTION, "");
			String points = null;

			if (direction.equals(mxConstants.DIRECTION_NORTH)
					|| direction.equals(mxConstants.DIRECTION_SOUTH))
			{
				points = "m " + (int) (0.5 * w) + " 0 l " + w + " "
						+ (int) (0.25 * h) + " l " + w + " " + (int) (0.75 * h)
						+ " l " + (int) (0.5 * w) + " " + h + " l 0 "
						+ (int) (0.75 * h) + " l 0 " + (int) (0.25 * h);
			}
			else
			{
				points = "m " + (int) (0.25 * w) + " 0 l " + (int) (0.75 * w)
						+ " 0 l " + w + " " + (int) (0.5 * h) + " l "
						+ (int) (0.75 * w) + " " + h + " l " + (int) (0.25 * w)
						+ " " + h + " l 0 " + (int) (0.5 * h);
			}

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_CLOUD))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			String points = "m " + (int) (0.25 * w) + " " + (int) (0.25 * h)
					+ " c " + (int) (0.05 * w) + " " + (int) (0.25 * h) + " 0 "
					+ (int) (0.5 * h) + " " + (int) (0.16 * w) + " "
					+ (int) (0.55 * h) + " c 0 " + (int) (0.66 * h) + " "
					+ (int) (0.18 * w) + " " + (int) (0.9 * h) + " "
					+ (int) (0.31 * w) + " " + (int) (0.8 * h) + " c "
					+ (int) (0.4 * w) + " " + (int) (h) + " " + (int) (0.7 * w)
					+ " " + (int) (h) + " " + (int) (0.8 * w) + " "
					+ (int) (0.8 * h) + " c " + (int) (w) + " "
					+ (int) (0.8 * h) + " " + (int) (w) + " " + (int) (0.6 * h)
					+ " " + (int) (0.875 * w) + " " + (int) (0.5 * h) + " c "
					+ (int) (w) + " " + (int) (0.3 * h) + " " + (int) (0.8 * w)
					+ " " + (int) (0.1 * h) + " " + (int) (0.625 * w) + " "
					+ (int) (0.2 * h) + " c " + (int) (0.5 * w) + " "
					+ (int) (0.05 * h) + " " + (int) (0.3 * w) + " "
					+ (int) (0.05 * h) + " " + (int) (int) (0.25 * w) + " "
					+ (int) (0.25 * h);

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_ACTOR))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			double width3 = w / 3;
			String points = "m 0 " + (int) (h) + " C 0 " + (int) (3 * h / 5)
					+ " 0 " + (int) (2 * h / 5) + " " + (int) (w / 2) + " "
					+ (int) (2 * h / 5) + " c " + (int) (w / 2 - width3) + " "
					+ (int) (2 * h / 5) + " " + (int) (w / 2 - width3) + " 0 "
					+ (int) (w / 2) + " 0 c " + (int) (w / 2 + width3) + " 0 "
					+ (int) (w / 2 + width3) + " " + (int) (2 * h / 5) + " "
					+ (int) (w / 2) + " " + (int) (2 * h / 5) + " c "
					+ (int) (w) + " " + (int) (2 * h / 5) + " " + (int) (w)
					+ " " + (int) (3 * h / 5) + " " + (int) (w) + " "
					+ (int) (h);

			elem.setAttribute("path", points + " x e");
		}
		else if (shape.equals(mxConstants.SHAPE_CYLINDER))
		{
			elem = document.createElement("v:shape");
			elem.setAttribute("coordsize", w + " " + h);

			double dy = Math.min(40, Math.floor(h / 5));
			String points = "m 0 " + (int) (dy) + " C 0 " + (int) (dy / 3)
					+ " " + (int) (w) + " " + (int) (dy / 3) + " " + (int) (w)
					+ " " + (int) (dy) + " L " + (int) (w) + " "
					+ (int) (h - dy) + " C " + (int) (w) + " "
					+ (int) (h + dy / 3) + " 0 " + (int) (h + dy / 3) + " 0 "
					+ (int) (h - dy) + " x e" + " m 0 " + (int) (dy) + " C 0 "
					+ (int) (2 * dy) + " " + (int) (w) + " " + (int) (2 * dy)
					+ " " + (int) (w) + " " + (int) (dy);

			elem.setAttribute("path", points + " e");
		}
		else
		{
			elem = document.createElement("v:rect");
		}

		String s = "position:absolute;left:" + String.valueOf(x) + "px;top:"
				+ String.valueOf(y) + "px;width:" + String.valueOf(w)
				+ "px;height:" + String.valueOf(h) + "px;";

		// Applies rotation
		double rotation = mxUtils.getDouble(style, mxConstants.STYLE_ROTATION);

		if (rotation != 0)
		{
			s += "rotation:" + rotation + ";";
		}

		elem.setAttribute("style", s);

		// Adds the shadow element
		if (mxUtils.isTrue(style, mxConstants.STYLE_SHADOW, false)
				&& fillColor != null)
		{
			Element shadow = document.createElement("v:shadow");
			shadow.setAttribute("on", "true");
			elem.appendChild(shadow);
		}

		float opacity = mxUtils.getFloat(style, mxConstants.STYLE_OPACITY, 100);

		// Applies opacity to fill
		if (fillColor != null)
		{
			Element fill = document.createElement("v:fill");
			fill.setAttribute("color", fillColor);

			if (opacity != 100)
			{
				fill.setAttribute("opacity", String.valueOf(opacity / 100));
			}

			elem.appendChild(fill);
		}
		else
		{
			elem.setAttribute("filled", "false");
		}

		// Applies opacity to stroke
		if (strokeColor != null)
		{
			elem.setAttribute("strokecolor", strokeColor);
			Element stroke = document.createElement("v:stroke");

			if (opacity != 100)
			{
				stroke.setAttribute("opacity", String.valueOf(opacity / 100));
			}

			elem.appendChild(stroke);
		}
		else
		{
			elem.setAttribute("stroked", "false");
		}

		elem.setAttribute("strokeweight", String.valueOf(strokeWidth) + "pt");
		appendVmlElement(elem);

		return elem;
	}

	/**
	 * Draws the given lines as segments between all points of the given list
	 * of mxPoints.
	 * 
	 * @param pts List of points that define the line.
	 * @param style Style to be used for painting the line.
	 */
	public Element drawLine(List pts, Hashtable style)
	{
		String strokeColor = mxUtils.getString(style,
				mxConstants.STYLE_STROKECOLOR);
		float strokeWidth = (float) (mxUtils.getFloat(style,
				mxConstants.STYLE_STROKEWIDTH, 1) * scale);

		Element elem = document.createElement("v:shape");

		if (strokeColor != null && strokeWidth > 0)
		{
			mxPoint pt = (mxPoint) pts.get(0);
			Rectangle r = new Rectangle(pt.getPoint());

			String d = "m " + Math.round(pt.getX()) + " "
					+ Math.round(pt.getY());

			for (int i = 1; i < pts.size(); i++)
			{
				pt = (mxPoint) pts.get(i);
				d += " l " + Math.round(pt.getX()) + " "
						+ Math.round(pt.getY());

				r = r.union(new Rectangle(pt.getPoint()));
			}

			elem.setAttribute("path", d);
			elem.setAttribute("filled", "false");
			elem.setAttribute("strokecolor", strokeColor);
			elem.setAttribute("strokeweight", String.valueOf(strokeWidth)
					+ "pt");

			String s = "position:absolute;" + "left:" + String.valueOf(r.x)
					+ "px;" + "top:" + String.valueOf(r.y) + "px;" + "width:"
					+ String.valueOf(r.width) + "px;" + "height:"
					+ String.valueOf(r.height) + "px;";
			elem.setAttribute("style", s);

			elem.setAttribute("coordorigin", String.valueOf(r.x) + " "
					+ String.valueOf(r.y));
			elem.setAttribute("coordsize", String.valueOf(r.width) + " "
					+ String.valueOf(r.height));
		}

		appendVmlElement(elem);

		return elem;
	}

	/**
	 * Draws the specified text either using drawHtmlString or using drawString.
	 * 
	 * @param text Text to be painted.
	 * @param x X-coordinate of the text.
	 * @param y Y-coordinate of the text.
	 * @param w Width of the text.
	 * @param h Height of the text.
	 * @param style Style to be used for painting the text.
	 */
	public Element drawText(String text, int x, int y, int w, int h,
			Hashtable style)
	{
		Element table = mxUtils.createTable(document, text, x, y, w, h, scale,
				style);
		appendVmlElement(table);

		return table;
	}

}