import e32 import appuifw import math import graphics # list of f-stops and N values fstops=[('f1', 0.0), ('f1.2', 1.18946), ('f1.4', 1.0), ('f1.6', 1.3333), ('f1.7', 1.5), ('f1.8', 1.6666), ('f2.0', 2.0), ('f2.2', 2.333), ('f2.4', 2.5), ('f2.5', 2.6666), ('f2.8', 3.0), ('f3.2', 3.333) , ('f3.4', 3.5), ('f3.6', 3.666), ('f4.0', 4.0), ('f4.5', 4.333), ('f4.8', 4.5) , ('f5.0', 4.666 ), ('f5.6', 5.0), ('f6.4', 5.333), ('f6.7', 5.5), ('f7.1', 5.666) , ('f8.0', 6.0), ('f9.0', 6.333), ('f9.5', 6.5) , ('f10', 6.666), ('f11', 7.0), ('f12.7', 7.333), ('f13.5', 7.5 ), ('f14.3', 7.666), ('f16', 8.0), ('f18', 8.333 ), ('f19', 8.5 ), ('f20', 8.6666 ) , ('f22', 9.0 ), ('f25', 9.333 ), ('f27', 9.5 ), ('f28', 9.666 ), ('f32', 10.0 ), ('f45', 11.0 ), ('f64', 12.0 ) ] # confusion diameter (for oly E-510 c == 0.015) #c=0.015 cd=[ ('35mm', 0.03), ('1.3x DSLR', 0.023), ('1.5x DSLR', 0.02), ('1.6x DSLR', 0.01875), ('2x DSLR', 0.015), ('6x5', 0.05), ('6x6', 0.06), ('6x7', 0.065), ('6x9', 0.075), ('4x5', 0.150) , ('5x7', 0.2 ), ('8x10', 0.3 )] # global vars c = '' H = '' Tot = '' Front = '' Behind = '' ######################################################################################### def calculate_DoF(fstop): global H, Tot, Behind, Front, c N=math.pow(2.0,(fstop/2.0)) # Hyperfocal distance H=(f*f)/(N*c)+f #Near distance of acceptable sharpness: Dn=s*1000.0*(H-f)/(H+(s*1000.0)-2.0*f) #Far distance of acceptable sharpness: Df=s*1000.0*((H)-f)/((H)-(s*1000.0)) #Total Tot=Df-Dn # behind subject Behind=Df-s*1000.0 # in front of the subject Front=s*1000.0-Dn return [H, Dn, Df, Tot, Front, Behind] ######################################################################################### def build_choices(elements,action): ch = [] for element in elements: ch.append((u""+element[0]+"",action)) return ch ######################################################################################### def handle_selection(): global lb, choices, choices_labels, c index = lb.current() code = choices[index][1] lb.set_list([u"Please wait..."]) if code == "cd_select": c = cd[index][1] # now we have to select the aperture choose_aperture() elif code == "aperture": selected=fstops[index][1] result = calculate_DoF(selected) display_result(fstops, f, s, c, result, index) else: appuifw.note(u"no valide code detected", 'error') #lb.set_list(choices_labels) ######################################################################################### def callback(event): print event ######################################################################################### def draw_state(): appuifw.app.body = canvas ######################################################################################### def select_aperture(): appuifw.app.body = lb ######################################################################################### def exit_key_handler(): appuifw.app.title = old_title appuifw.app.body = None app_lock.signal() ######################################################################################### def choose_conf_diam(): global lb, choices, choices_labels choices = build_choices(cd,"cd_select") choices_labels = [x[0] for x in choices] lb = appuifw.Listbox(choices_labels, handle_selection) appuifw.app.title = u"Conf. diam" appuifw.app.body = lb ######################################################################################### def choose_aperture(): global lb, choices, choices_labels choices = build_choices(fstops,"aperture") choices_labels = [x[0] for x in choices] lb = appuifw.Listbox(choices_labels, handle_selection) appuifw.app.title = u"Sel. aperture" appuifw.app.body = lb ######################################################################################### def display_result(fstops, f, s, c, result, index): Df = result[2] if Df < 0: Df = 'Inf' else: Df = round(Df/1000,2).__str__() + "m" Dn = result[1] if Dn < 0: Dn = 'Inf' else: Dn = round(Dn/1000,2).__str__() + "m" Tot = result[3] if Tot < 0: Tot = 'Inf' else: Tot = round(Tot/1000,2).__str__() + "m" Behind = result[5] if Behind < 0: Behind = 'Inf' else: Behind = round(Behind/1000,2).__str__() + "m" Front = result[4] if Front < 0: Front = 'Inf' else: Front = round(Front/1000,2).__str__() + "m" appuifw.app.title = u"DoF "+fstops[index][0].__str__() + "@" + f.__str__() + "mm ->" + s.__str__() + "m" appuifw.app.body = canvas canvas.clear() canvas.text( (10,25), u"Depth of Field", font= ('title',26, graphics.FONT_BOLD | graphics.FONT_ITALIC)) canvas.text( (10,50), u"Near limit", font='normal') canvas.text( (120,50), u":%-9.9s" % Dn, font='normal') canvas.text( (10,70), u"Far limit", font='normal') canvas.text( (120,70), u":%-9.9s" % Df, font='normal') canvas.text( (10,90), u"Total", font='normal') canvas.text( (120,90), u":%-9.9s" % Tot, font='normal') canvas.text( (10,110), u"In front", font='normal') canvas.text( (120,110), u":%-9.9s" % Front, font='normal') canvas.text( (10,130), u"Behind", font='normal') canvas.text( (120,130), u":%-9.9s" % Behind, font='normal') canvas.text( (10,150), u"%-21.21s %s" % ("Hyperfocal distance: ", round(result[0]/1000,2).__str__() + "m"), font='legend') canvas.text( (10,170), u"%-21.21s %s" % ("Circle of confusion: ", c.__str__() + "mm"), font='legend') def run_select(): # select the confusion diameter choose_conf_diam() #appuifw.app.body = canvas appuifw.app.menu = [(u"Choose aperture", choose_aperture)] ######################################################################################### if __name__ == '__main__': appuifw.app.exit_key_handler = exit_key_handler old_title = appuifw.app.title # s = lenght from subject in meters #s = 10.0 s = appuifw.query(u"Enter the distance to the subject (m)", "number", 10) # lens focal length f = appuifw.query(u"Enter the lense focal length (mm)", "number", 55) # global vars lb = '' choices = '' choices_labels = '' canvas = appuifw.Canvas() #event_callback=callback, redraw_callback=lambda rect:draw_state()) #screen_width,screen_height = canvas.size appuifw.app.body = canvas app_lock = e32.Ao_lock() run_select() app_lock.wait() appuifw.app.title = old_title