textfiguare.java

一个简易的java画图软件

package draw.figuare;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import app.pane.FontDialog;

/**
 * 文字图形
 * 
 * @author Thihy
 * 
 */
public class TextFiguare extends RectangularFiguare {
	protected String text;
	protected Font font;
	protected boolean shouldChangeBound;
	protected Color textColor;// 保留未用
	protected double textWidth, textLineHeight, textDesent;

	public TextFiguare() {
		this(0, 0, null, null);
	}

	public TextFiguare(double x, double y, Color lineColor, Color fillColor) {
		super(x, y, lineColor, fillColor, "draw Text");
		shouldChangeBound = false;
		font = new Font("微软雅黑", Font.PLAIN, 16);
		figuare = new Rectangle2D.Double(x, y, 10.0, 10.0);
		textColor = Color.black;
		this.strokeColor = null;
		this.fillColor = fillColor;
		editText();
	}

	@Override
	public int getID() {
		return TEXT;
	}

	@Override
	public Object clone() {
		Object a = super.clone();
		TextFiguare tf = (TextFiguare) a;
		tf.text = new String(text);
		tf.scaleX = scaleX;
		tf.scaleY = scaleY;
		tf.font = font;
		tf.shouldChangeBound = shouldChangeBound;
		tf.textColor = textColor;
		tf.textDesent = textDesent;
		tf.textLineHeight = textLineHeight;
		tf.textWidth = textWidth;
		return a;
	}

	/**
	 * 编辑文本，会弹出对话框
	 */
	public void editText() {
		FontDialog fd = new FontDialog(font, textColor, text);
		fd.setVisible(true);
		font = fd.getChoosedFont();
		fillColor = textColor = fd.getChoosedColor();
		setText(fd.getText());

	}

	/**
	 * 获取文本
	 */
	public String getText() {
		return text;
	}

	/**
	 * 设置文本
	 * 
	 * @param str
	 */
	public void setText(String str) {
		text = str;
		shouldChangeBound = true;
		isChanged = true;
	}

	@Override
	public void draw(Graphics2D g) {
		if (text.equals(""))
			return;// text为空就没有必要画了

		Color saveColor = g.getColor();
		AffineTransform saveAt = g.getTransform();

		g.rotate(rtTheta, rx, ry);
		g.shear(Math.tan(shXTheta), Math.tan(shYTheta));
		g.translate(-Math.max(y1, y2) * Math.tan(shXTheta), 0);

		g.setFont(font);

		if (shouldChangeBound) {
			FontRenderContext frc = g.getFontRenderContext();
			Rectangle2D rect = font.getStringBounds(text, frc);// 获得文字边框
			LineMetrics metrics = font.getLineMetrics(text, frc);

			textWidth = rect.getWidth();
			textLineHeight = metrics.getHeight();
			textDesent = metrics.getDescent();

			this.x2 = x1 + offset.left + offset.right + scaleX * textWidth;
			this.y2 = y1 + offset.top + offset.bottom + scaleY * textLineHeight;
			shouldChangeBound = false;
		} else {
			scaleX = Math.abs(Math.abs(x2 - x1) - offset.left - offset.right)
					/ textWidth;
			scaleY = Math.abs(Math.abs(y2 - y1) - offset.top - offset.bottom)
					/ textLineHeight;
		}
		updateFiguare();
		double scaleXY = Math.sqrt(scaleX * scaleX + scaleY * scaleY);
		g.setStroke(new BasicStroke((float) (lineWidth / scaleXY),
				BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 10.0f,
				new float[] { (float) ((Math.max(2.0, lineStyle / scaleXY))),
						(float) (lineStyle / scaleXY) }, 0.0f));

		Shape shape = font.createGlyphVector(g.getFontRenderContext(), text)
				.getOutline();

		g.scale(scaleX, scaleY);
		double strX = (Math.min(x1, x2) + offset.left) / scaleX;
		double strY = (Math.min(y1, y2) + offset.top) / scaleY + textLineHeight
				- textDesent;
		g.translate(strX, strY);

		if (strokeColor != null) {
			g.setColor(strokeColor);
			g.draw(shape);
		}
		if (fillColor != null) {
			g.translate(0.1, 0.1);
			g.setColor(fillColor);
			g.fill(shape);
		}
		g.setColor(saveColor);
		g.setTransform(saveAt);
	}

	@Override
	public boolean contains(double x, double y) {
		Point2D p = getPointBeforeTransform(x, y);
		boolean returnValue = figuare.contains(p);
		return returnValue;
	}

	@Override
	public Rectangle2D getExtraBounds() {
		Rectangle2D.Double rect = (Rectangle2D.Double) getBounds();
		return (Rectangle2D) rect.clone();
	}

	@Override
	public void drawTo(int x, int y) {
	}

	@Override
	public void deselect() {
	}

	@Override
	public Cursor getCursor(int Style) {
		return super.getCursor(Style);
	}

	@Override
	public void select(Graphics2D g) {
		super.select(g);
	}

	@Override
	public void updateFiguare() {
		((Rectangle2D.Double) figuare).setFrame(getBounds());
	}

	@Override
	protected Object getFiguareClone() {
		return ((Rectangle2D.Double) figuare).clone();
	}

}