Swing/MouseDrivenImageRotation のバックアップの現在との差分(No.10)
- category: swing folder: MouseDrivenImageRotation title: Mouseで画像を移動、回転 tags: [ImageIcon, MouseListener, MouseMotionListener, AffineTransform] tags: [ImageIcon, MouseListener, MouseMotionListener, AffineTransform, Area] author: aterai pubdate: 2009-05-25T13:21:41+09:00 description: 画像をマウスのドラッグで任意の位置に移動、回転します。 image:
概要
画像をマウスのドラッグで任意の位置に移動、回転します。Life is beautiful: 習作UI:初めてのFlash その2、その3のUI
を参考にしています。
概要
画像をマウスのドラッグで任意の位置に移動、回転します。Screenshot
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サンプルコード
サンプルコード
class DraggableImageMouseListener extends MouseAdapter {
private static final BasicStroke BORDER_STROKE = new BasicStroke(4f);
private static final Color BORDER_COLOR = Color.WHITE;
private static final Color HOVER_COLOR = new Color(100, 255, 200, 100);
private static final Color HOVER_COLOR = new Color(100, 255, 200, 100);
private static final int IR = 40;
private static final int OR = IR * 3;
private final RoundRectangle2D.Double border;
private final Ellipse2D.Double inner = new Ellipse2D.Double(0, 0, IR, IR);
private final Ellipse2D.Double outer = new Ellipse2D.Double(0, 0, OR, OR);
private final Point2D.Double imagePt = new Point2D.Double(10d, 50d);
private final Point2D.Double startPt = new Point2D.Double(); //drag start point
private final Point2D.Double centerPt = new Point2D.Double();
private final Shape border;
private final Shape polaroid;
private final RectangularShape inner = new Ellipse2D.Double(0, 0, IR, IR);
private final RectangularShape outer = new Ellipse2D.Double(0, 0, OR, OR);
private final Point2D startPt = new Point2D.Double();
private final Point2D centerPt = new Point2D.Double(100d, 100d);
private final Dimension imageSz;
private final Image image;
private double radian = 45d * (Math.PI / 180d);
private double startRadian; //drag start radian
private double radian = Math.toRadians(45d); // 45d / 180d * Math.PI;
private double startRadian; // drag start radian
private boolean moverHover;
private boolean rotatorHover;
protected DraggableImageMouseListener(ImageIcon ii) {
super();
image = ii.getImage();
int width = ii.getIconWidth();
int width = ii.getIconWidth();
int height = ii.getIconHeight();
centerPt.x = width / 2d;
centerPt.y = height / 2d;
inner.x = imagePt.x + centerPt.x - IR / 2;
inner.y = imagePt.y + centerPt.y - IR / 2;
outer.x = imagePt.x + centerPt.x - OR / 2;
outer.y = imagePt.y + centerPt.y - OR / 2;
border = new RoundRectangle2D.Double(0d, 0d, width, height, 10d, 10d);
imageSz = new Dimension(width, height);
border = new RoundRectangle2D.Double(0, 0, width, height, 10, 10);
polaroid = new Rectangle2D.Double(-2, -2, width + 4, height + 20);
setCirclesLocation(centerPt);
}
public void paint(Graphics g, ImageObserver ior) {
#spanadd
#spanend
private void setCirclesLocation(Point2D center) {
double cx = center.getX();
double cy = center.getY();
inner.setFrameFromCenter(cx, cy, cx + IR / 2d, cy - IR / 2d);
outer.setFrameFromCenter(cx, cy, cx + OR / 2d, cy - OR / 2d);
}
#spanadd
#spanend
public void paint(Graphics g, ImageObserver observer) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
AffineTransform at = AffineTransform.getTranslateInstance(imagePt.x, imagePt.y);
at.rotate(radian, centerPt.x, centerPt.y);
double w2 = imageSz.width / 2d;
double h2 = imageSz.height / 2d;
AffineTransform at = AffineTransform.getTranslateInstance(
centerPt.getX() - w2, centerPt.getY() - h2);
at.rotate(radian, w2, h2);
#spanadd
#spanend
g2.setPaint(BORDER_COLOR);
g2.setStroke(BORDER_STROKE);
Shape s = new Rectangle2D.Double(
border.x - 2, border.y - 2, border.width + 4, border.height + 20);
g2.fill(at.createTransformedShape(s));
g2.draw(at.createTransformedShape(s));
Shape s = at.createTransformedShape(polaroid);
g2.fill(s);
g2.draw(s);
g2.drawImage(image, at, ior);
g2.drawImage(image, at, observer);
#spanadd
#spanend
if (rotatorHover) {
Area donut = new Area(outer);
donut.subtract(new Area(inner));
g2.setPaint(HOVER_COLOR);
g2.fill(donut);
} else if (moverHover) {
g2.setPaint(HOVER_COLOR);
g2.fill(inner);
}
#spanadd
#spanend
g2.setPaint(BORDER_COLOR);
g2.setStroke(BORDER_STROKE);
g2.setPaint(BORDER_COLOR);
g2.draw(at.createTransformedShape(border));
g2.dispose();
}
#spanadd
#spanend
@Override public void mouseMoved(MouseEvent e) {
if (outer.contains(e.getX(), e.getY()) && !inner.contains(e.getX(), e.getY())) {
if (outer.contains(e.getX(), e.getY())
&& !inner.contains(e.getX(), e.getY())) {
moverHover = false;
rotatorHover = true;
} else if (inner.contains(e.getX(), e.getY())) {
moverHover = true;
rotatorHover = false;
} else {
moverHover = false;
rotatorHover = false;
}
e.getComponent().repaint();
}
#spanadd
#spanend
@Override public void mouseReleased(MouseEvent e) {
rotatorHover = false;
moverHover = false;
e.getComponent().repaint();
}
#spanadd
#spanend
@Override public void mousePressed(MouseEvent e) {
if (outer.contains(e.getX(), e.getY()) && !inner.contains(e.getX(), e.getY())) {
if (outer.contains(e.getX(), e.getY())
&& !inner.contains(e.getX(), e.getY())) {
rotatorHover = true;
startRadian = radian - Math.atan2(
e.getY() - imagePt.y - centerPt.y, e.getX() - imagePt.x - centerPt.x);
e.getY() - centerPt.getY(), e.getX() - centerPt.getX());
e.getComponent().repaint();
} else if (inner.contains(e.getX(), e.getY())) {
moverHover = true;
startPt.x = e.getX();
startPt.y = e.getY();
startPt.setLocation(e.getPoint());
e.getComponent().repaint();
}
}
#spanadd
#spanend
@Override public void mouseDragged(MouseEvent e) {
if (rotatorHover) {
radian = startRadian + Math.atan2(
e.getY() - imagePt.y - centerPt.y, e.getX() - imagePt.x - centerPt.x);
e.getY() - centerPt.getY(), e.getX() - centerPt.getX());
e.getComponent().repaint();
} else if (moverHover) {
imagePt.x += e.getX() - startPt.x;
imagePt.y += e.getY() - startPt.y;
inner.x = imagePt.x + centerPt.x - IR / 2;
inner.y = imagePt.y + centerPt.y - IR / 2;
outer.x = imagePt.x + centerPt.x - OR / 2;
outer.y = imagePt.y + centerPt.y - OR / 2;
startPt.x = e.getX();
startPt.y = e.getY();
centerPt.setLocation(
centerPt.getX() + e.getX() - startPt.getX(),
centerPt.getY() + e.getY() - startPt.getY());
setCirclesLocation(centerPt);
startPt.setLocation(e.getPoint());
e.getComponent().repaint();
}
}
}
View in GitHub: Java, Kotlin解説
解説
- 画像の移動: 画像の中心にマウスが近づくと表示される円図形をドラッグ
- 画像の回転: 上記の円図形の外側に表示されるドーナツ型図形をドラッグ
- ドーナツ型図形は、
Area#subtract
メソッドを使用して作成 - ドーナツ型図形は
Area#subtract(Area)
メソッドを使用して作成可能
- ドーナツ型図形は、