/**
* Creates a dialog box, allowing the user to enter the requested width, height, x & y
* coordinates, slice number for a Region Of Interest, option for oval, and option for whether x &
* y coordinates to be centered.
*/
void showDialog() {
Calibration cal = imp.getCalibration();
int digits = 0;
if (scaledUnits && cal.scaled()) digits = 2;
Roi roi = imp.getRoi();
if (roi == null) drawRoi();
GenericDialog gd = new GenericDialog("Specify");
gd.addNumericField("Width:", width, digits);
gd.addNumericField("Height:", height, digits);
gd.addNumericField("X coordinate:", xRoi, digits);
gd.addNumericField("Y coordinate:", yRoi, digits);
if (stackSize > 1) gd.addNumericField("Slice:", iSlice, 0);
gd.addCheckbox("Oval", oval);
gd.addCheckbox("Constrain square/circle", square);
gd.addCheckbox("Centered", centered);
if (cal.scaled()) {
boolean unitsMatch = cal.getXUnit().equals(cal.getYUnit());
String units = unitsMatch ? cal.getUnits() : cal.getXUnit() + " x " + cal.getYUnit();
gd.addCheckbox("Scaled units (" + units + ")", scaledUnits);
}
fields = gd.getNumericFields();
gd.addDialogListener(this);
gd.showDialog();
if (gd.wasCanceled()) {
if (roi == null) imp.deleteRoi();
else // *ALWAYS* restore initial ROI when cancelled
imp.setRoi(roi);
}
}
public boolean dialogItemChanged(GenericDialog gd, AWTEvent e) {
if (IJ.isMacOSX()) IJ.wait(50);
Calibration cal = imp.getCalibration();
width = gd.getNextNumber();
height = gd.getNextNumber();
xRoi = gd.getNextNumber();
yRoi = gd.getNextNumber();
if (stackSize > 1) iSlice = (int) gd.getNextNumber();
oval = gd.getNextBoolean();
square = gd.getNextBoolean();
centered = gd.getNextBoolean();
if (cal.scaled()) scaledUnits = gd.getNextBoolean();
if (gd.invalidNumber() || width <= 0 || height <= 0) return false;
//
Vector numFields = gd.getNumericFields();
Vector checkboxes = gd.getCheckboxes();
boolean newWidth = false, newHeight = false, newXY = false;
if (e != null && e.getSource() == checkboxes.get(SQUARE) && square) {
width = 0.5 * (width + height); // make square: same width&height
height = width;
newWidth = true;
newHeight = true;
}
if (e != null && e.getSource() == checkboxes.get(CENTERED)) {
double shiftBy = centered ? 0.5 : -0.5; // 'centered' changed:
xRoi += shiftBy * width; // shift x, y to keep roi the same
yRoi += shiftBy * height;
newXY = true;
}
if (square && width != height && e != null) { // in 'square' mode, synchronize width&height
if (e.getSource() == numFields.get(WIDTH)) {
height = width;
newHeight = true;
} else if (e.getSource() == numFields.get(HEIGHT)) {
width = height;
newWidth = true;
}
}
if (e != null && cal.scaled() && e.getSource() == checkboxes.get(SCALED_UNITS)) {
double xFactor = scaledUnits ? cal.pixelWidth : 1. / cal.pixelWidth;
double yFactor = scaledUnits ? cal.pixelHeight : 1. / cal.pixelHeight;
width *= xFactor; // transform everything to keep roi the same
height *= yFactor;
xRoi *= xFactor;
yRoi *= yFactor;
newWidth = true;
newHeight = true;
newXY = true;
}
int digits = (scaledUnits || (int) width != width) ? 2 : 0;
if (newWidth) ((TextField) (numFields.get(WIDTH))).setText(IJ.d2s(width, digits));
if (newHeight) ((TextField) (numFields.get(HEIGHT))).setText(IJ.d2s(height, digits));
digits = (scaledUnits || (int) xRoi != xRoi || (int) yRoi != yRoi) ? 2 : 0;
if (newXY) {
((TextField) (numFields.get(X_ROI))).setText(IJ.d2s(xRoi, digits));
((TextField) (numFields.get(Y_ROI))).setText(IJ.d2s(yRoi, digits));
}
if (stackSize > 1 && iSlice > 0 && iSlice <= stackSize) imp.setSlice(iSlice);
if (!newWidth && !newHeight && !newXY) // don't draw if an update will come immediately
drawRoi();
return true;
}
