package ij.gui;
import java.awt.*;
import java.awt.image.*;
import ij.*;
/** Freehand region of interest or freehand line of interest*/
public class FreehandRoi extends PolygonRoi {
public FreehandRoi(int sx, int sy, ImagePlus imp) {
super(sx, sy, imp);
if (Toolbar.getToolId()==Toolbar.FREEROI)
type = FREEROI;
else
type = FREELINE;
if (nPoints==2) nPoints--;
}
protected void grow(int sx, int sy) {
int ox = ic.offScreenX(sx);
int oy = ic.offScreenY(sy);
if (ox<0) ox = 0;
if (oy<0) oy = 0;
if (ox>xMax) ox = xMax;
if (oy>yMax) oy = yMax;
if (ox!=xp[nPoints-1]+x || oy!=yp[nPoints-1]+y) {
xp[nPoints] = ox-x;
yp[nPoints] = oy-y;
nPoints++;
if (nPoints==xp.length)
enlargeArrays();
drawLine();
}
}
void drawLine() {
int x1 = xp[nPoints-2]+x;
int y1 = yp[nPoints-2]+y;
int x2 = xp[nPoints-1]+x;
int y2 = yp[nPoints-1]+y;
int xmin = Math.min(x1, x2);
int xmax = Math.max(x1, x2);
int ymin = Math.min(y1, y2);
int ymax = Math.max(y1, y2);
int margin = 4;
if (lineWidth>margin && isLine())
margin = lineWidth;
if (ic!=null) {
double mag = ic.getMagnification();
if (mag<1.0) margin = (int)(margin/mag);
}
imp.draw(xmin-margin, ymin-margin, (xmax-xmin)+margin*2, (ymax-ymin)+margin*2);
}
protected void handleMouseUp(int screenX, int screenY) {
if (state==CONSTRUCTING) {
addOffset();
finishPolygon();
}
state = NORMAL;
}
}