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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) {
if (subPixelResolution() && xpf!=null) {
growFloat(sx, sy);
return;
}
int ox = offScreenX(sx);
int oy = 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 (IJ.altKeyDown())
wipeBack();
if (nPoints==xp.length)
enlargeArrays();
drawLine();
}
}
private void growFloat(int sx, int sy) {
double ox = offScreenXD(sx);
double oy = offScreenYD(sy);
if (ox<0.0) ox = 0.0;
if (oy<0.0) oy = 0.0;
if (ox>xMax) ox = xMax;
if (oy>yMax) oy = yMax;
double xbase = getXBase();
double ybase = getYBase();
if (ox!=xpf[nPoints-1]+xbase || oy!=ypf[nPoints-1]+ybase) {
xpf[nPoints] = (float)(ox-xbase);
ypf[nPoints] = (float)(oy-ybase);
nPoints++;
if (nPoints==xpf.length)
enlargeArrays();
drawLine();
}
}
void drawLine() {
int x1, y1, x2, y2;
if (xpf!=null) {
x1 = (int)Math.round(xpf[nPoints-2]+x);
y1 = (int)Math.round(ypf[nPoints-2]+y);
x2 = (int)Math.round(xpf[nPoints-1]+x);
y2 = (int)Math.round(ypf[nPoints-1]+y);
} else {
x1 = xp[nPoints-2]+x;
y1 = yp[nPoints-2]+y;
x2 = xp[nPoints-1]+x;
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);
}
if (IJ.altKeyDown())
margin += 20; // for wipeBack
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;
}
}
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