For the thickness prompt, try inputdlg().
To get the points, try getpts() if you have the Image Processing Toolbox. Or just put
[x,y] = ginput(1)
into a while loop where you break out of the while loop if the user clicks the right mouse button. Try this:
clc;
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
fontSize = 24;
imshow('cameraman.tif');
hold on;
maxAllowablePoints = 5; % Whatever you want.
numPointsClicked = 0;
promptMessage = sprintf('Left click up to %d points.\nRight click when done.', maxAllowablePoints);
titleBarCaption = 'Continue?';
button = questdlg(promptMessage, titleBarCaption, 'Continue', 'Cancel', 'Continue');
if strcmpi(button, 'Cancel')
return;
end
while numPointsClicked < maxAllowablePoints
numPointsClicked = numPointsClicked + 1;
[x(numPointsClicked), y(numPointsClicked), button] = ginput(1)
plot(x(numPointsClicked), y(numPointsClicked), 'r+', 'MarkerSize', 15);
if button == 3
% Exit loop if
break;
end
end
% Print to command window
x
y
msgbox('Done collecting points');
