package ij.gui;
import ij.*;
import ij.process.*;
import ij.measure.*;
import ij.plugin.Straightener;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.KeyEvent;
import java.awt.geom.*;
/** This class represents a straight line selection. */
public class Line extends Roi {
public int x1, y1, x2, y2; // the line
public double x1d, y1d, x2d, y2d; // the line using sub-pixel coordinates
protected double x1R, y1R, x2R, y2R; // the line, relative to base of bounding rect
private double xHandleOffset, yHandleOffset;
protected double startxd, startyd;
static boolean widthChanged;
/** Creates a new straight line selection using the specified
starting and ending offscreen integer coordinates. */
public Line(int ox1, int oy1, int ox2, int oy2) {
this((double)ox1, (double)oy1, (double)ox2, (double)oy2);
}
/** Creates a new straight line selection using the specified
starting and ending offscreen double coordinates. */
public Line(double ox1, double oy1, double ox2, double oy2) {
super((int)ox1, (int)oy1, 0, 0);
type = LINE;
x1d=ox1; y1d=oy1; x2d=ox2; y2d=oy2;
x1=(int)x1d; y1=(int)y1d; x2=(int)x2d; y2=(int)y2d;
x=(int)Math.min(x1d,x2d); y=(int)Math.min(y1d,y2d);
x1R=x1d-x; y1R=y1d-y; x2R=x2d-x; y2R=y2d-y;
width=(int)Math.abs(x2R-x1R); height=(int)Math.abs(y2R-y1R);
if (!(this instanceof Arrow) && lineWidth>1)
updateWideLine(lineWidth);
updateClipRect();
oldX=x; oldY=y; oldWidth=width; oldHeight=height;
state = NORMAL;
}
/** Starts the process of creating a new user-generated straight line
selection. 'sx' and 'sy' are screen coordinates that specify
the start of the line. The user will determine the end of the line
interactively using rubber banding. */
public Line(int sx, int sy, ImagePlus imp) {
super(sx, sy, imp);
startxd = ic.offScreenXD(sx);
startyd = ic.offScreenYD(sy);
x1R = x2R = startxd - startX;
y1R = y2R = startyd - startY;
type = LINE;
if (!(this instanceof Arrow) && lineWidth>1)
updateWideLine(lineWidth);
}
/**
* @deprecated
* replaced by Line(int, int, int, int)
*/
public Line(int ox1, int oy1, int ox2, int oy2, ImagePlus imp) {
this(ox1, oy1, ox2, oy2);
setImage(imp);
}
protected void grow(int sx, int sy) {
double xend = ic!=null?ic.offScreenXD(sx):sx;
double yend = ic!=null?ic.offScreenYD(sy):sy;
if (xend<0.0) xend=0.0; if (yend<0.0) yend=0.0;
if (xend>xMax) xend=xMax; if (yend>yMax) yend=yMax;
double xstart=x+x1R, ystart=y+y1R;
if (constrain) {
double dx = Math.abs(xend-xstart);
double dy = Math.abs(yend-ystart);
if (dx>=dy)
yend = ystart;
else
xend = xstart;
}
x=(int)Math.min(x+x1R,xend); y=(int)Math.min(y+y1R,yend);
x1R=xstart-x; y1R=ystart-y;
x2R=xend-x; y2R=yend-y;
if (IJ.controlKeyDown()) {
x1R=(int)Math.round(x1R); y1R=(int)Math.round(y1R);
x2R=(int)Math.round(x2R); y2R=(int)Math.round(y2R);
}
width=(int)Math.abs(x2R-x1R); height=(int)Math.abs(y2R-y1R);
if (width<1) width=1; if (height<1) height=1;
updateClipRect();
imp.draw(clipX, clipY, clipWidth, clipHeight);
oldX=x; oldY=y;
oldWidth=width; oldHeight=height;
}
void move(int sx, int sy) {
int xNew = ic.offScreenX(sx);
int yNew = ic.offScreenY(sy);
x += xNew - startxd;
y += yNew - startyd;
clipboard=null;
startxd = xNew;
startyd = yNew;
updateClipRect();
imp.draw(clipX, clipY, clipWidth, clipHeight);
oldX = x;
oldY = y;
oldWidth = width;
oldHeight=height;
}
protected void moveHandle(int sx, int sy) {
double ox = ic.offScreenXD(sx);
double oy = ic.offScreenYD(sy);
x1d=x+x1R; y1d=y+y1R; x2d=x+x2R; y2d=y+y2R;
double length = Math.sqrt((x2d-x1d)*(x2d-x1d) + (y2d-y1d)*(y2d-y1d));
switch (activeHandle) {
case 0:
double dx = ox-x1d;
double dy = oy-y1d;
x1d=ox;
y1d=oy;
if(center){
x2d -= dx;
y2d -= dy;
}
if(aspect){
double ratio = length/(Math.sqrt((x2d-x1d)*(x2d-x1d) + (y2d-y1d)*(y2d-y1d)));
double xcd = x1d+(x2d-x1d)/2;
double ycd = y1d+(y2d-y1d)/2;
if(center){
x1d=xcd-ratio*(xcd-x1d);
x2d=xcd+ratio*(x2d-xcd);
y1d=ycd-ratio*(ycd-y1d);
y2d=ycd+ratio*(y2d-ycd);
} else {
x1d=x2d-ratio*(x2d-x1d);
y1d=y2d-ratio*(y2d-y1d);
}
}
break;
case 1:
dx = ox-x2d;
dy = oy-y2d;
x2d=ox;
y2d=oy;
if(center){
x1d -= dx;
y1d -= dy;
}
if(aspect){
double ratio = length/(Math.sqrt((x2d-x1d)*(x2d-x1d) + (y2d-y1d)*(y2d-y1d)));
double xcd = x1d+(x2d-x1d)/2;
double ycd = y1d+(y2d-y1d)/2;
if(center){
x1d=xcd-ratio*(xcd-x1d);
x2d=xcd+ratio*(x2d-xcd);
y1d=ycd-ratio*(ycd-y1d);
y2d=ycd+ratio*(y2d-ycd);
} else {
x2d=x1d+ratio*(x2d-x1d);
y2d=y1d+ratio*(y2d-y1d);
}
}
break;
case 2:
dx = ox-(x1d+(x2d-x1d)/2);
dy = oy-(y1d+(y2d-y1d)/2);
x1d+=dx; y1d+=dy; x2d+=dx; y2d+=dy;
if (getStrokeWidth()>1) {
x1d+=xHandleOffset; y1d+=yHandleOffset;
x2d+=xHandleOffset; y2d+=yHandleOffset;
}
break;
}
if (constrain) {
double dx = Math.abs(x1d-x2d);
double dy = Math.abs(y1d-y2d);
double xcd = Math.min(x1d,x2d)+dx/2;
double ycd = Math.min(y1d,y2d)+dy/2;
//double ratio = length/(Math.sqrt((x2d-x1d)*(x2d-x1d) + (y2d-y1d)*(y2d-y1d)));
if (activeHandle==0) {
if (dx>=dy) {
if(aspect){
if(x2d>x1d) x1d=x2d-length;
else x1d=x2d+length;
}
y1d = y2d;
if(center){
y1d=y2d=ycd;
if(aspect){
if(xcd>x1d) {
x1d=xcd-length/2;
x2d=xcd+length/2;
}
else{
x1d=xcd+length/2;
x2d=xcd-length/2;
}
}
}
}else {
if(aspect){
if(y2d>y1d) y1d=y2d-length;
else y1d=y2d+length;
}
x1d = x2d;
if(center){
x1d=x2d=xcd;
if(aspect){
if(ycd>y1d) {
y1d=ycd-length/2;
y2d=ycd+length/2;
}
else{
y1d=ycd+length/2;
y2d=ycd-length/2;
}
}
}
}
} else if (activeHandle==1) {
if (dx>=dy) {
if(aspect){
if(x1d>x2d) x2d=x1d-length;
else x2d=x1d+length;
}
y2d= y1d;
if(center){
y1d=y2d=ycd;
if(aspect){
if(xcd>x1d) {
x1d=xcd-length/2;
x2d=xcd+length/2;
}
else{
x1d=xcd+length/2;
x2d=xcd-length/2;
}
}
}
} else {
if(aspect){
if(y1d>y2d) y2d=y1d-length;
else y2d=y1d+length;
}
x2d = x1d;
if(center){
x1d=x2d=xcd;
if(aspect){
if(ycd>y1d) {
y1d=ycd-length/2;
y2d=ycd+length/2;
}
else{
y1d=ycd+length/2;
y2d=ycd-length/2;
}
}
}
}
}
}
x=(int)Math.min(x1d,x2d); y=(int)Math.min(y1d,y2d);
x1R=x1d-x; y1R=y1d-y;
x2R=x2d-x; y2R=y2d-y;
width=(int)Math.abs(x2R-x1R); height=(int)Math.abs(y2R-y1R);
updateClipRect();
imp.draw(clipX, clipY, clipWidth, clipHeight);
oldX = x;
oldY = y;
oldWidth = width;
oldHeight = height;
}
protected void mouseDownInHandle(int handle, int sx, int sy) {
state = MOVING_HANDLE;
activeHandle = handle;
if (getStrokeWidth()<=3)
ic.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
}
/** Draws this line on the image. */
public void draw(Graphics g) {
Color color = strokeColor!=null? strokeColor:ROIColor;
g.setColor(color);
x1d=x+x1R; y1d=y+y1R; x2d=x+x2R; y2d=y+y2R;
x1=(int)x1d; y1=(int)y1d; x2=(int)x2d; y2=(int)y2d;
int sx1 = screenXD(x1d);
int sy1 = screenYD(y1d);
int sx2 = screenXD(x2d);
int sy2 = screenYD(y2d);
int sx3 = sx1 + (sx2-sx1)/2;
int sy3 = sy1 + (sy2-sy1)/2;
Graphics2D g2d = (Graphics2D)g;
if (stroke!=null)
g2d.setStroke(getScaledStroke());
g.drawLine(sx1, sy1, sx2, sy2);
if (wideLine && !overlay) {
g2d.setStroke(onePixelWide);
g.setColor(getColor());
g.drawLine(sx1, sy1, sx2, sy2);
}
if (state!=CONSTRUCTING && !overlay) {
int size2 = HANDLE_SIZE/2;
handleColor = strokeColor!=null?strokeColor:ROIColor;
drawHandle(g, sx1-size2, sy1-size2);
handleColor=Color.white;
drawHandle(g, sx2-size2, sy2-size2);
drawHandle(g, sx3-size2, sy3-size2);
}
if (state!=NORMAL)
IJ.showStatus(imp.getLocationAsString(x2,y2)+", angle=" + IJ.d2s(getAngle(x1,y1,x2,y2)) + ", length=" + IJ.d2s(getLength()));
if (updateFullWindow)
{updateFullWindow = false; imp.draw();}
}
/** Returns the length of this line. */
public double getLength() {
if (imp==null || IJ.altKeyDown())
return getRawLength();
else {
Calibration cal = imp.getCalibration();
return Math.sqrt((x2d-x1d)*cal.pixelWidth*(x2d-x1d)*cal.pixelWidth
+ (y2d-y1d)*cal.pixelHeight*(y2d-y1d)*cal.pixelHeight);
}
}
/** Returns the length of this line in pixels. */
public double getRawLength() {
return Math.sqrt((x2d-x1d)*(x2d-x1d)+(y2d-y1d)*(y2d-y1d));
}
/** Returns the pixel values along this line. */
public double[] getPixels() {
double[] profile;
if (getStrokeWidth()==1) {
ImageProcessor ip = imp.getProcessor();
profile = ip.getLine(x1d, y1d, x2d, y2d);
} else {
ImageProcessor ip2 = (new Straightener()).rotateLine(imp,(int)getStrokeWidth());
if (ip2==null) return null;
int width = ip2.getWidth();
int height = ip2.getHeight();
profile = new double[width];
double[] aLine;
ip2.setInterpolate(false);
for (int y=0; y<height; y++) {
aLine = ip2.getLine(0, y, width-1, y);
for (int i=0; i<width; i++)
profile[i] += aLine[i];
}
for (int i=0; i<width; i++)
profile[i] /= height;
}
return profile;
}
public Polygon getPolygon() {
Polygon p = new Polygon();
if (getStrokeWidth()==1) {
p.addPoint(x1, y1);
p.addPoint(x2, y2);
} else {
double angle = Math.atan2(y1-y2, x2-x1);
double width2 = getStrokeWidth()/2.0;
double p1x = x1 + Math.cos(angle+Math.PI/2d)*width2;
double p1y = y1 - Math.sin(angle+Math.PI/2d)*width2;
double p2x = x1 + Math.cos(angle-Math.PI/2d)*width2;
double p2y = y1 - Math.sin(angle-Math.PI/2d)*width2;
double p3x = x2 + Math.cos(angle-Math.PI/2d)*width2;
double p3y = y2 - Math.sin(angle-Math.PI/2d)*width2;
double p4x = x2 + Math.cos(angle+Math.PI/2d)*width2;
double p4y = y2 - Math.sin(angle+Math.PI/2d)*width2;
p.addPoint((int)Math.round(p1x), (int)Math.round(p1y));
p.addPoint((int)Math.round(p2x), (int)Math.round(p2y));
p.addPoint((int)Math.round(p3x), (int)Math.round(p3y));
p.addPoint((int)Math.round(p4x), (int)Math.round(p4y));
}
return p;
}
public void drawPixels(ImageProcessor ip) {
ip.setLineWidth(1);
if (getStrokeWidth()==1) {
ip.moveTo(x1, y1);
ip.lineTo(x2, y2);
} else {
ip.drawPolygon(getPolygon());
updateFullWindow = true;
}
}
public boolean contains(int x, int y) {
if (getStrokeWidth()>1) {
if ((x==x1&&y==y1) || (x==x2&&y==y2))
return true;
else
return getPolygon().contains(x,y);
} else
return false;
}
/** Returns a handle number if the specified screen coordinates are
inside or near a handle, otherwise returns -1. */
public int isHandle(int sx, int sy) {
int size = HANDLE_SIZE+5;
if (getStrokeWidth()>1) size += (int)Math.log(getStrokeWidth());
int halfSize = size/2;
int sx1 = ic.screenXD(x+x1R) - halfSize;
int sy1 = ic.screenYD(y+y1R) - halfSize;
int sx2 = ic.screenXD(x+x2R) - halfSize;
int sy2 = ic.screenYD(y+y2R) - halfSize;
int sx3 = sx1 + (sx2-sx1)/2-1;
int sy3 = sy1 + (sy2-sy1)/2-1;
if (sx>=sx1&&sx<=sx1+size&&sy>=sy1&&sy<=sy1+size) return 0;
if (sx>=sx2&&sx<=sx2+size&&sy>=sy2&&sy<=sy2+size) return 1;
if (sx>=sx3&&sx<=sx3+size+2&&sy>=sy3&&sy<=sy3+size+2) return 2;
return -1;
}
public static int getWidth() {
return lineWidth;
}
public static void setWidth(int w) {
if (w<1) w = 1;
int max = 500;
if (w>max) {
ImagePlus imp2 = WindowManager.getCurrentImage();
if (imp2!=null) {
max = Math.max(max, imp2.getWidth());
max = Math.max(max, imp2.getHeight());
}
if (w>max) w = max;
}
lineWidth = w;
widthChanged = true;
}
public void setStrokeWidth(float width) {
super.setStrokeWidth(width);
if (getStrokeColor()==Roi.getColor())
wideLine = true;
}
/** Return the bounding rectangle of this line. */
public Rectangle getBounds() {
int xmin = (int)Math.round(Math.min(x1d, x2d));
int ymin = (int)Math.round(Math.min(y1d, y2d));
int w = (int)Math.round(Math.abs(x2d - x1d));
int h = (int)Math.round(Math.abs(y2d - y1d));
return new Rectangle(xmin, ymin, w, h);
}
protected int clipRectMargin() {
return 4;
}
/** Nudge end point of line by one pixel. */
public void nudgeCorner(int key) {
if (ic==null) return;
double inc = 1.0/ic.getMagnification();
switch(key) {
case KeyEvent.VK_UP: y2R-=inc; break;
case KeyEvent.VK_DOWN: y2R+=inc; break;
case KeyEvent.VK_LEFT: x2R-=inc; break;
case KeyEvent.VK_RIGHT: x2R+=inc; break;
}
grow(ic.screenXD(x+x2R), ic.screenYD(y+y2R));
}
}