package org.pptx4j;
public class Box {
public Box(long offsetX, long offsetY, long extentX, long extentY) {
offset = new Point(offsetX, offsetY);
extent = new Point(extentX, extentY);
System.out.println(debug());
}
// Position of top left corner,
// from origin in top lef
Point offset;
// Length of sides
Point extent;
/**
* Flip across Y axis
*/
public void flipH() {
offset.x = offset.x + extent.x;
extent.x = -extent.x;
System.out.println("FlipH--> " + debug());
}
/**
* Flip across X axis, so Y co-ordinate changes
*/
public void flipV() {
offset.y = offset.y + extent.y;
extent.y = -extent.y;
System.out.println("FlipV--> " + debug());
}
public Point getOtherCorner() {
return offset.add(extent);
}
public void toPixels() {
offset = offset.toPixels();
extent = extent.toPixels();
}
/**
* Clockwise rotation, about the bounding-box centre
*
* @param units are 60 thousandths of a degree
*/
public void rotate(int units) {
// For translation
Point centre = new Point(
Math.round(offset.x + 0.5f* extent.x),
Math.round(offset.y + 0.5f* extent.y)) ;
float degree = -units/60000; // clockwise
System.out.println("Rotating " + degree);
float radians = (float)Math.toRadians(degree);
// Extent
// .. work out
Point otherCorner = getOtherCorner();
Point otherCornerDash = otherCorner.subtract(centre);
Point otherCornerDash2 = rotate(otherCornerDash, radians);
Point otherCornerDash3 = otherCornerDash2.add(centre);
// Offset
Point offsetDash = offset.subtract(centre);
Point offsetDash2 = rotate(offsetDash, radians);
Point offsetDash3 = offsetDash2.add(centre);
offset = offsetDash3;
extent = otherCornerDash3.subtract(offset);
System.out.println("Rotated--> " + debug());
}
private Point rotate(Point p, float radians) {
long xDash = Math.round((p.x*Math.cos(radians)) -(p.y*Math.sin(radians)));
long yDash = Math.round((p.x*Math.sin(radians)) + (p.y*Math.cos(radians)));
return new Point(xDash, yDash);
}
public String debug() {
return "offset " + offset.debug() + "; extent " + extent.debug();
}
public Point getOffset() {
return offset;
}
public Point getExtent() {
return extent;
}
// public String getExtentYAsString() {
// return Long.toString(extentY);
// }
public static void main(String[] args) {
Box b = new Box(0,0,1,0);
b.rotate( 5400000); // 90 degrees
System.out.println( );
}
}