Examples for dialogs.form_dialog() ?

[cvp]

@madivad said:

Do you mean it’s only a problem with the beta?

I think so

[madivad]

@cvp do you think there would be a workaround using the objc tools?

[cvp]

@madivad I think that Objectivec is not needed and that you could use tableview_cell_for_row delegate

Édit: but you need to have your own form_dialog, I think 😢

[madivad]

@cvp ok, thx

[cvp]

@madivad try this, waiting that @omz correct it

import dialogs
import datetime

#================ copy dialogs.form_dialog: begin
import collections
import sys
PY3 = sys.version_info[0] >= 3
if PY3:
	basestring = str

def my_form_dialog(title='', fields=None, sections=None, done_button_title='Done'):
	if not sections and not fields:
		raise ValueError('sections or fields are required')
	if not sections:
		sections = [('', fields)]
	if not isinstance(title, basestring):
		raise TypeError('title must be a string')
	for section in sections:
		if not isinstance(section, collections.Sequence):
			raise TypeError('Sections must be sequences (title, fields)')
		if len(section) < 2:
			raise TypeError('Sections must have 2 or 3 items (title, fields[, footer]')
		if not isinstance(section[0], basestring):
			raise TypeError('Section titles must be strings')
		if not isinstance(section[1], collections.Sequence):
			raise TypeError('Expected a sequence of field dicts')
		for field in section[1]:
			if not isinstance(field, dict):
				raise TypeError('fields must be dicts')

	#========== modify textfield frame: begin
	c = dialogs._FormDialogController(title, sections, done_button_title=done_button_title)
	for s in range(0,len(c.sections)):
		for i in range(0,len(c.cells[s])):			# loop on rows of section s
			cell = c.cells[s][i]									
			print(cell.text_label.text)
			if len(cell.content_view.subviews) > 0:
				tf = cell.content_view.subviews[0] 		# ui.TextField of value in row
				tf.x += 20
				tf.width -= 20
	#========== modify textfield frame: end
				
	c.container_view.present('sheet')
	c.container_view.wait_modal()
	# Get rid of the view to avoid a retain cycle:
	c.container_view = None
	if c.was_canceled:
		return None
	return c.values
#================ copy dialogs.form_dialog: end

form_list_of_sections = []

sectionA_dicts = []
sectionA_dicts.append(dict(type = 'text', title = 'First Name',
key = 'first', placeholder = 'John'))

sectionA_dicts.append(dict(type = 'text', title = 'Last Name',
key = 'last', placeholder = 'Doe')) 

sectionA_dicts.append(dict(type = 'number', title = 'age',
key = 'age', placeholder='30')) 

form_list_of_sections.append(('Section A', sectionA_dicts, 'Section A ends'))

sectionB_dicts = []
sectionB_dicts.append(dict(type = 'date', title = 'Date Of Birth',
key = 'DOB', value = datetime.date.today()))

sectionB_dicts.append(dict(type = 'url', title = 'Home Page',
    key = 'homepage', placeholder = 'http://example.com')) 
    
form_list_of_sections.append(('Section B', sectionB_dicts, 'Section B ends'))

sectionC_dicts = []
sectionC_dicts.append(dict(type = 'email', title = 'email',
key = 'email', placeholder = 'name@mailserver.com')) 

sectionC_dicts.append(dict(type = 'switch', title = 'is_married',
key = 'is_married', value = True))  

sectionC_dicts.append(dict(type = 'check', title = 'is_registered',
key = 'is_registered', value = False))  

form_list_of_sections.append(('Section C', sectionC_dicts, 'Section C ends'))

diag = my_form_dialog(title = 'Form Dialog', sections=form_list_of_sections)
print(diag) 

[cvp]

@madivad better with

			if len(cell.content_view.subviews) > 0:
				tf = cell.content_view.subviews[0] 		# ui.TextField of value in row
				if type(tf) is ui.TextField:
					tf.x += 20
					tf.width -= 20 

[ccc]

@cvp said:

if type(tf) is ui.TextField:

PEP8: Avoid directly comparing types. Use isinstance(tf, ui.TextField) instead.

[cvp]

@ccc ok, PEP are conventions. Why "Avoid directly comparing types"? Is there a technical reason? You have to agree that "type(tf) is xxx" is more readable than the PEP code 😀

[cvp]

@ccc found that, and I like it, thus, forget my previous post 😀

isinstance caters for inheritance (an instance of a derived class is an instance of a base class, too), while checking for equality of type does not (it demands identity of types and rejects instances of subtypes, AKA subclasses).

Normally, in Python, you want your code to support inheritance, of course (since inheritance is so handy, it would be bad to stop code using yours from using it!), so isinstance is less bad than checking identity of types because it seamlessly supports inheritance.

It's not that isinstance is good, mind you—it's just less bad than checking equality of types

[madivad]

@cvp but but but...
It's a text field, why not just align it right?

I did just that and it's perfect now:

tf.alignment=ui.ALIGN_RIGHT

:)

Is there a way to do that without creating our own custom dialogue type?

[cvp]

@madivad said:

Is there a way to do that without creating our own custom dialogue type?

I don't think so because dialogs.form_dialog does the "present" and you can't modify something after the view presentation. But perhaps somebody else could find another way.

[cvp]

@madivad said:

tf.alignment=ui.ALIGN_RIGHT

Good idea but sometimes, user may prefer a left alignment for text and a right alignment for numbers, thus, up to you 😀

[madivad]

@cvp maybe, but in any case, left aligned to the fields title is ugly to me. I can't think of a usecase where you would want it like that. Maybe in an RTL language, but I wouldn't know.

About the modifying after the present, yes makes sense. Having the custom dialogue type is no big issue. I'll use that.

Thanks for your help!

[cvp]

For info, in all my big scripts I always use my own form_dialog, while keeping the standard dialogs._FormDialogController, because in my dialog views I add some buttons or I add some types like SegmentedControl or ImageView or even MkMapView, so...

[madivad]

@cvp you are a machine! Great work.

[cvp]

@madivad said:

left aligned to the fields title is ugly to me.

I can understand that.
I have cases where I want left alignment but I add spaces to titles to force that all titles have same width and thus all TextFields begin at same x.

[cvp]

I always use my own form_dialog,

So, you can even change font, color and... of your fields, by example, in function of their name.

[cvp]

Other solution without using an own form_dialog,
but by monkey patching the class method tableview_cell_for_row of the dialogs._FormDialogController class

def my_tableview_cell_for_row(self,tv, section, row):
	cell = self.cells[section][row]
	if len(cell.content_view.subviews) > 0:
		tf = cell.content_view.subviews[0] 		# ui.TextField of value in row
		if type(tf) is ui.TextField:
			tf.alignment=ui.ALIGN_RIGHT
	return cell
	
dialogs._FormDialogController.tableview_cell_for_row = my_tableview_cell_for_row

diag = dialogs.form_dialog(title = 'Form Dialog', sections=form_list_of_sections) 

[madivad]

@cvp ahh, I thought something like that would be possible. Just no idea how. Awesome, thanks.

[cvp]

@madivad for the fun, thanks to this marvelous app and ObjectiveC, you can even have a dialog field type of UISegmentedControl with images as segments:

segments = [ui.Image.named('test:Lenna').with_rendering_mode(ui.RENDERING_MODE_ORIGINAL), ui.Image.named('IMG_7923.JPG').with_rendering_mode(ui.RENDERING_MODE_ORIGINAL)]
sectionA_dicts.append(dict(type = 'text', title = 'My segmented images',
key = 'segm_img', segments = segments))

.
.
.

def objcsegmentselection_(_self, _cmd, _sender):
	idx = ObjCInstance(_sender).selectedSegmentIndex()
	if idx >= 0:	
		c.values[ObjCInstance(_sender).name] = idx

def my_tableview_cell_for_row(self,tv, section, row):
	global c
	#print('section=',section,'row=',row)
	c = self
	cell = self.cells[section][row]
	if len(cell.content_view.subviews) > 0:
		tf = cell.content_view.subviews[0]      # ui.TextField of value in row
		item = self.sections[section][1][row]	
		new_type = False
		if 'segments' in item:
			if isinstance(item['segments'][0],str):
				# segments are strings
				# check if ui.SegmentedControl already added
				for sv in cell.content_view.subviews:
					if isinstance(tf, ui.SegmentedControl):
						return cell
				segmented = ui.SegmentedControl()
				segmented.name = cell.text_label.text
				segmented.action = segmented_action
				segmented.frame = tf.frame
				segmented.x = c.view.width - segmented.width - 8
				segmented.segments = item['segments']
				cell.content_view.add_subview(segmented)
			elif isinstance(item['segments'][0],ui.Image):
				# segments are ui.Image
				# we will create an UISegmentedControl instead of tf
				# thus we will never more see it as subview of cell.content_view
				items = []
				for ui_image in item['segments']:
					items.append(ObjCInstance(ui_image))
				segmented = ObjCClass('UISegmentedControl').alloc().initWithItems_(items)
				x = c.view.width - tf.width - 8
				frame = CGRect(CGPoint(x,tf.y), CGSize(tf.width,tf.height))
				segmented.name = tf.name # used in action
				segmented.setFrame_(frame)
				for sv in segmented.subviews():
					# UIImageView of each UISegment
					sv.subviews()[0].setContentMode_(1)	# scaleAspectFit
					
				ActionTarget = create_objc_class('ActionTarget', methods=[objcsegmentselection_])
				target = ActionTarget.new().autorelease()
				segmented.addTarget_action_forControlEvents_(target, 'objcsegmentselection:',1 << 12) # UIControlEventValueChanged
				
				ObjCInstance(cell.content_view).addSubview_(segmented)