[forms-devel] forms-devel Digest, Vol 4, Issue 2
Glenn Versweyveld
glenn.versweyveld at gmail.com
Wed Aug 17 17:13:35 UTC 2016
Triple state is handy for new input screens, null means user never touched
it. So we can do data validation... Otherwise you'll get a lot of false
negatives in the db
On Wednesday, 17 August 2016, Brian Lagunas <brian.lagunas at live.com> wrote:
> CheckBoxes support three states; checked, unchecked, and indeterminate;
> If you do not make the data type a Nullable<bool> then you cannot support
> all three state that a CheckBox has.
>
>
>
> @Jason, it’s a necessary evil. If we provide a CheckBox then ee must
> support all three states. Otherwise, I would suggest not adding it at all
> and rely on third party vendors to provide the control.
>
>
>
> *Brian Lagunas*
>
> Senior Product Owner | Infragistics, Inc
>
> www.brianlagunas.com | @brianlagunas
>
>
>
> *From:* Jason Smith [mailto:jas at microsoft.com
> <javascript:_e(%7B%7D,'cvml','jas at microsoft.com');>]
> *Sent:* Wednesday, August 17, 2016 1:20 AM
> *To:* rina you <rina6350.you at gmail.com
> <javascript:_e(%7B%7D,'cvml','rina6350.you at gmail.com');>>; Brian Lagunas <
> brian.lagunas at live.com
> <javascript:_e(%7B%7D,'cvml','brian.lagunas at live.com');>>;
> forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>
> *Subject:* RE: [forms-devel] forms-devel Digest, Vol 4, Issue 2
>
>
>
> I would like to avoid Nullable<T> in the public API surface area if at all
> possible. It’s a pretty ugly thing to have anywhere.
>
>
>
> *From:* forms-devel [mailto:forms-devel-bounces at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel-bounces at lists.dot.net');>] *On
> Behalf Of *rina you
> *Sent:* Wednesday, August 17, 2016 12:19 AM
> *To:* Brian Lagunas <brian.lagunas at live.com
> <javascript:_e(%7B%7D,'cvml','brian.lagunas at live.com');>>;
> forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>
> *Subject:* Re: [forms-devel] forms-devel Digest, Vol 4, Issue 2
>
>
>
> Hello Brian,
>
> Thank you for your reply.
> Your opinion about event name is right.
> The event name of CheckBox should be 'Checked'.
>
> About the states of IsChecked, if CheckBox isn't checked, the value of
> IsChecked will be false.
> Could you share the reason that the IsChecked property should support
> nullable value?
> Thank you.
>
> Best regards,
>
> - Rina You
>
>
>
> 2016. 8. 17. 오후 3:32에 "Brian Lagunas" <brian.lagunas at live.com
> <javascript:_e(%7B%7D,'cvml','brian.lagunas at live.com');>>님이 작성:
>
> I would name the event Checked, not Clicked. Clicking is not the same as
> checking.
>
>
>
> Will it not support 3 states? If so, the IsChecked property should be a
> Nullable<bool> (bool?)
>
>
>
> *Brian Lagunas*
>
> Senior Product Owner | Infragistics, Inc
>
> www.brianlagunas.com
> <https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.brianlagunas.com%2f&data=01%7c01%7cjas%40microsoft.com%7c4e34aa4363784ad746bb08d3c66ec341%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=MUZXV3Qd7rbcSg5ZsXD%2fMMsl%2bFpm4FYRgkpuDHRuAk4%3d>
> | @brianlagunas
>
>
>
> *From:* forms-devel [mailto:forms-devel-bounces at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel-bounces at lists.dot.net');>] *On
> Behalf Of *rina you
> *Sent:* Wednesday, August 17, 2016 12:09 AM
> *To:* forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>; Jason Smith <
> jas at microsoft.com <javascript:_e(%7B%7D,'cvml','jas at microsoft.com');>>
> *Subject:* Re: [forms-devel] forms-devel Digest, Vol 4, Issue 2
>
>
>
> Hello,
>
> I'd like to share a draft spec for CheckBox in the mailing list.
> And then, I will make a PR for CheckBox based on other opinions in this
> mailing list.
>
> * The CheckBox will inherit View and IFontElement and have a public
> constructor for initializing a new instance of the CheckBox class.
>
> * The CheckBox will have the following public fields for bindable
> properties:
> - public static readonly BindableProperty FontAttributesProperty :
> Identifies the FontAttributes bindable property.
> - public static readonly BindableProperty FontFamilyProperty :
> Identifies the FontFamily bindable property.
> - public static readonly BindableProperty FontSizeProperty :
> Identifies the FontSize bindable property.
> - public static readonly BindableProperty IsCheckedProperty :
> Identifies the IsChecked bindable property.
> - public static readonly BindableProperty TextProperty :
> Identifies the Text bindable property.
> - public static readonly BindableProperty TextColorProperty :
> Identifies the TextColor bindable property.
>
> * The CheckBox will have the following public properties.
> - public Font FontAttributes : A value that indicates whether the font
> of the checkbox is bold, italic or neither.
> - public String FontFamily : A value that indicates the font family
> which the checkbox font belongs to.
> - public Double FontSize : A value that indicates font size of the
> checkbox.
> - public bool IsChecked : A value that indicates whether this
> checkbox is checked or not.
> - public String Text : A value for the text that is displayed as
> the content of the checkbox.
> - public Color TextColor : A value that indicates the color for the
> text of checkbox.
>
> * The CheckBox will have an event.
> - public event EventHandler Clicked : This event occurs when the checkbox
> is checked.
>
> If you have any opinion about the draft spec for CheckBox, please, could
> you share your opinion?
> I look forward to hearing any opinions about this draft spec.
> Thank you.
>
> Best regards,
>
> - Rina You
>
>
>
> 2016. 8. 16. 오후 7:18에 "rina you" <rina6350.you at gmail.com
> <javascript:_e(%7B%7D,'cvml','rina6350.you at gmail.com');>>님이 작성:
>
> Hello,
>
> I am happy to hear this news from you.
> In this case, should I prepare the PR for CheckBox?
> I look forward to hearing your opinion.
> Thank you.
>
> Best regards,
>
> - Rina You
>
>
>
> 2016. 8. 16. 오후 4:26에 "Jason Smith" <jas at microsoft.com
> <javascript:_e(%7B%7D,'cvml','jas at microsoft.com');>>님이 작성:
>
> In general we are on board with the creation of a general Checkbox
> control. I would love to see an API proposal here in the mailing list J
>
>
>
> *From:* forms-devel [mailto:forms-devel-bounces at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel-bounces at lists.dot.net');>] *On
> Behalf Of *rina you
> *Sent:* Friday, August 12, 2016 12:57 AM
> *To:* forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>
> *Subject:* Re: [forms-devel] forms-devel Digest, Vol 4, Issue 2
>
>
>
> Hello all and Adam,
>
> Thank you for you opinion.
>
> I agree that the way using ListView you mention can be another way to
> provide a multiple selection of items.
> I also agree that this approach can provide better UX for ListView.
>
> However, how about considering the scenario that the number of item is one
> or two?
> If the number of item is one or two and app user can select one status
> between 'Checked' and 'Unchecked' in each item,
> Should app developer provide this UX with ListView?
> The development process of an app that this UX is provided with ListView
> takes more time than the procedure using a simple checkbox.
> The app should include more code line than an app using a simple checkbox.
>
> As you already know, checkBox have function to indicate two states which
> are 'checked' and 'unchecked' with text
> as well as function to provide multiple selections of items.
> So, checkBox could be useful control for providing user's selection
> between 'checked' and 'unchecked' about one or two items with text.
>
> Also, is this link(https://material.google.com/
> <https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fmaterial.google.com%2f&data=01%7c01%7cjas%40microsoft.com%7cb3c1d44ecf3042c9df2308d3c2863d6f%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=4Q%2b7aBplhu%2bp8mercu%2b%2bNUx1aIzyNpnbyIsJiFQ%2fNjg%3d>)
> Google Material Design Guidelines you mention on a previous email?
> Actually, it is a little hard to find some opinion that guideline
> specially discourage checkbox.
> Instead, this design guideline describes well that checkbox is one of
> controls for allowing the user to select options.
> I'd like to share two link about checkbox in Google Material Design
> Guidelines.
> - https://material.google.com/components/selection-controls.html#
> <https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fmaterial.google.com%2fcomponents%2fselection-controls.html%23&data=01%7c01%7cjas%40microsoft.com%7cb3c1d44ecf3042c9df2308d3c2863d6f%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=uuf%2ferYU9MNszNei%2bznP66uRhu%2fud0LuPvVmV59R3mY%3d>
> - https://material.google.com/components/lists-controls.html#
> <https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fmaterial.google.com%2fcomponents%2flists-controls.html%23&data=01%7c01%7cjas%40microsoft.com%7cb3c1d44ecf3042c9df2308d3c2863d6f%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=KfVnIYNo1G7rgkZDPT1QhtIEgC8NAxF9wEAl%2fp3MBLU%3d>
> These two link describe definitely how checkbox can be useful for
> providing various UX to user.
>
> Thank you for sharing your opinion about checkbox again.
>
> Best regards,
>
> - Rina You
>
>
>
> 2016. 8. 12. 오후 1:27에 "S.H Choi" <flyofsky at gmail.com
> <javascript:_e(%7B%7D,'cvml','flyofsky at gmail.com');>>님이 작성:
>
> ---------- 전달된 메일 ----------
> 보낸사람: "Adam Pedley" <adam.pedley at gmail.com
> <javascript:_e(%7B%7D,'cvml','adam.pedley at gmail.com');>>
> 날짜: 2016. 8. 11. 오후 9:15
> 제목: Re: [forms-devel] forms-devel Digest, Vol 4, Issue 2
> 받는사람: <forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>>
> 참조:
>
> Since Checkboxes are natively a part of Android and UWP, I think it could
> be good to expose them. iOS would probably need a toggle with a different
> image, or a button with a different selected state as I don't know of a
> native checkbox.
>
>
>
> Rina, while checkboxes can be good the specific scenario you mention for
> their use, such as a multiple select of items in a list is normally
> discouraged due to UX issues such as if you are selecting the item or
> ticking the checkbox. For this reason Google Material Design Guidelines
> specifically discourages them and I think other guideline do as well.
>
>
>
> Might I suggest when you select an item in the ListView or list of some
> kind you show a tick next to the item, or highlight the row in the list.
> This approach tends to go over better in a mobile UI and doesn't confuse
> selecting the list row, vs a control in the list.
>
>
>
> On Thu, Aug 11, 2016 at 10:00 PM, <forms-devel-request at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel-request at lists.dot.net');>>
> wrote:
>
> Send forms-devel mailing list submissions to
> forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>
>
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> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of forms-devel digest..."
>
>
> Today's Topics:
>
> 1. Add a CheckBox (rina you)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 11 Aug 2016 20:31:08 +0900
> From: rina you <rina6350.you at gmail.com
> <javascript:_e(%7B%7D,'cvml','rina6350.you at gmail.com');>>
> To: forms-devel at lists.dot.net
> <javascript:_e(%7B%7D,'cvml','forms-devel at lists.dot.net');>
> Subject: [forms-devel] Add a CheckBox
> Message-ID:
> <CAGxJt92CwqbUrTT+2GzONiEWt4Rww6uzcYxd0RmW2gTyB8
> _snw at mail.gmail.com
> <javascript:_e(%7B%7D,'cvml','CAGxJt92CwqbUrTT%2B2GzONiEWt4Rww6uzcYxd0RmW2gTyB8_snw at mail.gmail.com');>
> >
> Content-Type: text/plain; charset="utf-8"
>
> Hello,
> I'd like to add a CheckBox for allowing the user can select multiple
> options in the list.
> And a CheckBox is a specific control that has two states which are
> 'checked' and 'unchecked'.
>
> This CheckBox will have the following properties.
> - FontAttributes : A value that indicate whether the font of the checkbox
> is bold, italic or neither.
> - FontFamily : A value that indicate font family to which the font for
> checkbox text belongs.
> - FontSize : A value that indicate font size of checkbox.
> - IsChecked : A value that indicate whether this checkbox is checked or
> not.
> - Text : A text displayed as the content of the checkbox.
> - TextColor : A value that indicate the color for the text of checkbox.
>
> Also, this CheckBox will have an event.
> - Checked : This event occurs when checkbox is checked.
>
> Just like other controls, the CheckBox is a very common control.
> Xamarin will be able to provide richer function in many application, if
> this control is added on xamarin.
> I will look forward to hearing your opinion.
> Thank you.
>
> Best regard,
>
> Rina You
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