fixed first frame definition in yeasts macro

Author: c-h-benedetti

clement/macros/measure-rect-over-time/septins-update-all.ijm

@@ -19,20 +19,22 @@ function join(a, b) {
 	return a + File.separator + b;
 }
 
-function update_frames() {
-	if (remember) { return true; }
+function ask_frames() {
+	if (remember) { return; }
 	Dialog.create("N. of frames in sequence to analyze");
 	Dialog.addNumber("N. frames before", 1);
 	Dialog.addNumber("N. frames after", 1);
 	Dialog.addCheckbox("Remember frames range?", false);
 	Dialog.show();
+	f_before = Dialog.getNumber();
+	f_after  = Dialog.getNumber();
+	remember = Dialog.getCheckbox();
+}
 
+function update_frames() {
 	getDimensions(width, height, channels, slices, frames);
 	Stack.getPosition(channel, slice, frame);
 
-	f_before = Dialog.getNumber();
-	f_after  = Dialog.getNumber();
-	remember = Dialog.getCheckbox();
 	f_first  = frame - f_before;
 	f_last   = frame + f_after;
 
@@ -187,6 +189,7 @@ function analyze_cell(cell_index) {
 function main() {
 	cell_index = 1;
 	preprocess();
+	ask_frames();
 	while(true) {
 		analyze_cell(cell_index);
 		cell_index++;