I am writing an app for hotel registration. There are multiple fillup forms to get all relevant information/data. But I have kept each fillup form in different class. There are next and back buttons at the bottom of screen. I have created several global variables so that they can be accessed throughout the project.
For screen changes on next button taps, I have created a list of form screens.
List<Widget> formScreens = [personal_info,login_creds, bank_details,hotel_configs]
So when I Tap Next button there is a global variable (index) which changes value by +1 to iterate over formScreens.
setState(){
globals.index-=-1;
}
I have created these naviagators (next and back buttons) in a different class. They also work fine.
But When I tap on the Next button, Build method, which controlls all the different components and creates a body, isn't called immediatly, thus not updating screen to the next screen. But when I tap on any of the formFields, build method is invoked and the screen changes to next fillup form.
This is on my first screen, so there is no back button
I have segregated each component because it was fairly large amount of code to be kept in a single class.
Or is there any other way that I can use segregated components and access them throughout the project?
Related
I want a menu (hidden on the left side of my app) with a variable amount of buttons (depending on the user). I took the app over from another developer and he manually added every view and every button and it is a pain to maintain if you want to add another button in between or change something. So I want to redo it automatically.
But how can I achieve that? Let's say i have on the left x views, each containing an image, a button and a separator (to the button below). So I basically only create one single prototype view, button combo and reuse it for all other buttons. But how do I arrange them so the constraints are correctly set?
I would go with a table-view. Setup a cell with an image and a button, separators come for free in a table-view. Make sure the cell has a delegate for the button call-back or a closure to handle the button tap.
Add a controller/manager to control the number of views based on the user.
We built a React Native tablet kiosk app which displays multiple pages of input fields to a user at a front desk. The user has to fill out all the forms and can send them at the end.
Users can just walk away from the kiosk at any time, which would result in their last screen being the "welcome screen" for the next user. To avoid that, the app resets after some time if there was no user interaction (any touch event on the screen).
Right now, we use a countdown and reset it on each input field, button and background touch there is. This results in passing the reset callback to a lot of components. It works, but it is just a lot of redundancy and can lead to errors easily.
Is there any way, we can add an overlay to the very top of the view, which can catch all touch events and call the reset callback, but also pass the touch event to the views below? So when a user clicks on a button, the overlay calls the its callback but also the button is clicked (same for input fields, etc).
We also tried the Gesture Responder System, but could not get the touch event to pass through - it was always consumed by the component with the Gesture Responder System.
You can try adding a pointerEvents attribute to your View.
To share a common display layout in a Split template Windows Store app, I put a Back button, title TextBlock, and another button in a UserControl, and then use that control in most of my pages. My problem is that in the main page, neither of the buttons will react to pointer activity, be it pointer over or clicking. However, it works fine in any other page. To isolate it, I created a blank app and duplicated the UserControl, but it works in that case.
How can I debug this?
Thanks.
-John
In an "ItemView" page of a "Split" template app, the Grid containing the back button and title must be below the GridView and ListView in the XAML code. Apparently the GridView, with no Grid.Row, and a Grid.RowSpan="2" needs to overlay the first and second rows, and if the button is beneath the GridView, it must assume it is not visible and doesn't need to respond to events. I moved my new user control instance to below the GridView, and the buttons work now.
This whole scheme of overlaying both rows makes no sense to me, but without the Grid.RowSpan="2", the items don't split nicely into two rows for me. I think such odd layout should have a comment explaining it in the template. Perhaps it could save someone else from this same kind of issue.
I have a form in a UIView which consist of multiple textfields, couple of textviews and two fields that are interacted with by the means of an invisible button overlaid on them. When you click on a textfield, the keyboard pops up for text entry and I added a toolbar on it for navigating to the previous and next data entry (whatever the data entry is, be it a textfield, textview or one of the two special cases that are interacted with a button). Now, when I navigate with between textfields with those buttons everything works fine. My scrollview's content moves along the element that becomes the firstresponder (with the help of a piece of code from stackoverflow that scrolls the view while taking into account the height of the keyboard that hides a good portion of it). Here is a visual example.
The problem arises when I want to switch out of a specific data entry (date) that interacts with a hidden button. I'll give some context first. Those data entries show datepickers (one for the date, another for the time) in action sheets, and those action sheets also have navigating button in a toolbar, like so.
The code from stackoverflow that readjust the view do so in the didBeginEditing delegate methods of the textfields and textviews, so when I assign them first responder the scrollview adjust itself while taking into account the keyboard.
This means that, in the case that I switch into a special data entry, I manually move the scrollview's content so I can view the next element. When I switch from a special entry into a textfield I assume that the previously mentioned code from stackoverflow kicks in and adjust the view. It actually does when I move from the hour data entry (which uses a datepicker in an actionsheet) into the next element which is a textfield. However, when I'm at the date data entry (which is directly before the hour data entry) and press previous to assign the first responder to the textfield above it, the scrollview goes way ahead the text field, like so.
What's important to note is that this problem only occurs when the textfield is not in view. This makes me suspect that I'm incorrectly using the code that readjust the view. For instance, there is a constant in the code that represents the height of the keyboard. I tried changing it from 216 to 260 (so it takes into account my toolbar added on top of the keyboard) but this results in strange black artifacts near the buttom that only occasionally appears.
I'm kind of lost in this bug, and my post is already pretty long. I've prepared an example of my problem in a new project, if any of you could take a look into it I'd be very appreciative.
Here it is
I'm creating a login form that's loaded from a nib. I have several NSTextFields, but when the app is launched, the one that gains focus immediately is the last one I added to the form. How do I set up the tab order and change or remove the initial focus?
In the Interface Builder: Right click on the NSTextField, link the nextKeyView with the object you want to be the next one that should be activated by pressing the "tab" button.
There's also an option called "Refuse First Responder". This option avoids the blue frame.