Examples of java.awt.Graphics2D.rotate()

java.awt.Graphics2D.rotate()
Concatenates the current Graphics2D Transform with a rotation transform. Subsequent rendering is rotated by the specified radians relative to the previous origin. This is equivalent to calling transform(R), where R is an AffineTransform represented by the following matrix:
```
 [   cos(theta)    -sin(theta)    0   ] [   sin(theta)     cos(theta)    0   ] [       0              0         1   ] 
```
Rotating with a positive angle theta rotates points on the positive x axis toward the positive y axis. @param theta the angle of rotation in radians

    if (!isValid()) super.validate();
    Graphics2D g2d = (Graphics2D)g;
    if (tappedAngle > 0) {
      g2d = (Graphics2D)g2d.create();
      float edgeOffset = cardWidth / 2f;
      g2d.rotate(tappedAngle, cardXOffset + edgeOffset, cardYOffset + cardHeight - edgeOffset);
    }
    super.paint(g2d);
  }


  protected void paintComponent (Graphics g) {

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                case VERTICAL: {
                    dataRenderer.setSize(Math.max(getHeight() - (buttonPadding.top + buttonPadding.bottom + 2), 0),
                        Math.max(getWidth() - (buttonPadding.left + buttonPadding.right + 2), 0));


                    contentGraphics.translate(buttonPadding.top + 1, buttonPadding.left + 1);
                    contentGraphics.rotate(-Math.PI / 2d);
                    contentGraphics.translate(-dataRenderer.getWidth(), 0);
                    break;
                }
            }

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    float bendPercent = (float)Math.asin(ey / length);
    if (endX > startX) bendPercent = -bendPercent;
    Area arrow = getArrow(length, bendPercent);
    Graphics2D g2d = (Graphics2D)g;
    g2d.translate(startX, startY);
    g2d.rotate(Math.atan2(ey, ex));
    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.setComposite(composite);
    g2d.setColor(this.color);
    g2d.fill(arrow);
    g2d.setColor(Color.BLACK);

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            g.setComposite( AlphaComposite.getInstance( AlphaComposite.SRC_OVER, 0.5f ) );


            g.translate( cx+translateX, cy+translateY );
            g.scale( 1.0001+scale, 1.0001+scale );  // The .0001 works round a bug on Windows where drawImage throws an ArrayIndexOutofBoundException
            if ( rotation != 0 )
                g.rotate( rotate );
            g.translate( -cx, -cy );


            g.drawImage( dst, null, null );
            g.dispose();
            BufferedImage ti = dst;

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                    break;
                default:
                    break;
            }
            graphics.translate(translateX,translateY);
            graphics.rotate((float)Math.toRadians(rotationAngle));
        }
        graphics.scale( scaling, scaling );
        PageDrawer drawer = new PageDrawer();
        drawer.drawPage( graphics, this, pageDimension );

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                        default:
                                break;
                }
                if (isStringPainted()) {
                        if (getOrientation() == VERTICAL) {
                                g2.rotate(-Math.PI * 3.0 / 2.0, str_x, str_y);
                                g2.drawString(getString(), str_x, str_y);
                                g2.rotate(Math.PI * 3.0 / 2.0, str_x, str_y);
                        } else {
                                g2.drawString(getString(), str_x, str_y);
                        }

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                }
                if (isStringPainted()) {
                        if (getOrientation() == VERTICAL) {
                                g2.rotate(-Math.PI * 3.0 / 2.0, str_x, str_y);
                                g2.drawString(getString(), str_x, str_y);
                                g2.rotate(Math.PI * 3.0 / 2.0, str_x, str_y);
                        } else {
                                g2.drawString(getString(), str_x, str_y);
                        }
                }
                if (isBorderPainted()) {

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        for (int i = 0; i < c; i++) {
            float f = ((i + 1) / (float)c);
            Color col = new Color(0.0f, 1 - f, 0.0f);
            copy.setColor(col);
            copy.fillRect(70, 90, 50, 50);
            copy.rotate(-2 * Math.PI / c, 70, 90);
        }
        copy.dispose();


        //Some text
        g2d.rotate(-0.25);

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        for (int i = 0; i < c; i++) {
            float f = ((i + 1) / (float)c);
            Color col = new Color(0.0f, 1 - f, 0.0f);
            copy.setColor(col);
            copy.fillRect(0, 0, 120, 120);
            copy.rotate(-2 * Math.PI / c);
        }
        copy.dispose();


        //the same in gray scales
        copy = (Graphics2D)g2d.create();

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        for (int i = 0; i < c; i++) {
            float f = ((i + 1) / (float)c);
            Color col = new Color(f, f, f);
            copy.setColor(col);
            copy.fillRect(0, 0, 120, 120);
            copy.rotate(-2 * Math.PI / c);
        }
        copy.dispose();
        return buf;
    }

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