How to use "preventDefault" equivalent for React Native Text Input onSubmitEditing? - react-native

I have a text input with a submit button next to it. When the submit button is pressed I get one behavior. When the enter button on the keyboard is pressed, I get a slightly different behavior even though I have them both running the same exact function. This leads me to believe that when the enter button is pressed, some other function is also getting called. How do I go about preventing this default function from being called so that only my custom function is called?

Related

tabindex not being set when textbox has focus

I have a textbox that when focused it calls an ajax request and populates a list for the user to choose from. Basically just recreated the dropdown using a textbox instead of a select.
The problem is that if I click on the textbox the browser does not recognize the tabindex of the input. Instead it resets its self and starts back at 0. If I tab to the next element tabs work fine, only when I click in the input field to give it focus does it start acting up.
I did notice last night if I put an alert in the page on the focus event that it seems to work. Guessing because the browser focuses on the elememt after I click the ok button.
has anyone heard of this before?
found what was causing the problem. I was calling .blur() on keydown and code was 9 or 13 (Tab/Enter). Not sure why this would give me the problem I was having. I would have just thought the blur event would have executed twice. However I suppose that I was forcing blur on keydown and the current tabindex was not being set. If this is the case then If I needed to I should beable to call blur() onkeyup event.

Triggering Visual Basic Keydown events without a specific function

I'm building on top of code that a previous developer has left me, and he left something that intrigued me quite a bit.
Basically on his menus, he has a TextBox to take in user input and a button next to it to submit the value of the TextBox (for example if the user wanted to select option 1, he would input 1 into the TextBox and click the button). However, the user could also press the Enter key while focusing the TextBox, and it would be treated as the submit button was clicked.
Now this is simple enough to do, but when I check the VB code behind the menu, there's no TextBox_Keydown(...) Handles TextBox.Keydown function anywhere, only the button click event. How is he doing this? He has several menus that are similar and I can't figure out how.
A standard dialog box, if not told to act otherwise, enter does default command button and escape does cancel. In VB look at the properties Default for the command button.
I discovered how he was doing it. He basically mapped the AcceptButton and CancelButton properties of the entire Windows Form to various button functions.

Triggering callback without pressing the button in Cocoa

I need to be able to start the authentication process in this sample without pressing the button provided by default.
The action I want to run is the -(void)buttonPressed method, but if I try to invoke it manually the plugin crashes. It's invoked automatically by pressing that button but it would be nice to be able to just press enter.
This should all be obvious after a single glance in the plugin source code you linked!
While it shouldn't crash (after a quick look into the class code), you probably do not supply the appropriate sender when sending buttonPressed: from your code. The method is defined as
- (void)buttonPressed:(SFButtonType)inButtonType
Which clearly shows the button that was pressed is given as sender. So in your code when calling buttonPressed: do for example like:
["referenceRToClass" buttonPressed:SFButtonTypeOK];

App calls Method on mouse click. How can I stop it?

So I am pretty new to Xcode and Objective C, I've been using it about 2 weeks now. I am building an app for OSX. One of the windows in the app has 5 text boxes, some labels and a submit button at the bottom. The submit button is linked to a method that closes the window, opens a new one and outputs the contents of the text boxes into one text field on the new window.
I had it working correctly, but now when I do anything but click on the top text field the submit method is called and the window closes. I can click on the black space in the window, but click on any of the objects calls the method. Also, pressing tab calls the method. I am not sure when I did to cause this error, but any insight or tips would be very useful.
Sorry if this is vague, I'm not even sure how to describe the problem. If you need any specific information please ask.
Try looking in Interface Builder. Ctrl Click or Right click on the each one of the fields that are responding with calling the function. See if they are linked to the function.
Also check the "responder" as was suggested earlier. You can do this by also right click or ctrl clicking the red responder box labeled "responder". See if anything in there maps to your function

Using Enter key to invoke different methods in Mac(objective c)

I am new to Objective c programming. I have created an application which has a UI with two buttons "Cancel" and "Ok". On clicking "Cancel", the application must terminate and clicking "Ok" must perform some task. Everything works fine. I am able to tab between these buttons and can call the required functionality by clicking space button.
All I want to do is, that when focus is on "Cancel" button(using tab key) then on clicking enter button from keyboard, my application should terminate and similarly, when focus is on "Ok" button then clicking enter should perform the desired functionality.
I have even set the 'setKeyEquivalent" property of the "Ok" and "Cancel" button, but I can only set unique keyequivalents. I also tried to read the title or tag value of the buttons and then call the required functionality but it didn't worked too.
Can someone please guide me how can I use enter button to invoke different functions depending upon the selected button in UI.
I think you don't want to set key equivalents for the buttons. You would want to override keyDown: and test for the enter key, then do the appropriate thing depending on which button had focus (which I think you could determine using NSWindow's firstResponder method).