I'm using JavaFX for my application's GUI. I want to implement a validation method for all the textfields inside the sign up window. I want to check them all and than, whether they are true or false, I want to use a mark to show the user what field is incorrect. I also want to be able to show a small message box when I hover the mouse pointer over those marks.
Simple way is to create HBox , put TextField,Label in there ,label will be Bound on the textProperty/ or do it with listener
txtField.textProperty().addListener((v, oldValue, newValue) -> {
//code here if valid, set label visible false, else set label visible true(red image crossed or whatever)
});
, when value changes it will check if that is ACCEPTABLE/FAILED state , for instance empty box.States will be changed on property change , use array of your hboxes to check if they are valid or invalid at the time , you can check this based on visibility of Label or internal boolean state value.
For the hover over part , use Tooltip on label.
If you want to go lazyer way , take a look at controlsfx validation it will take care of graphics for you.And its already embedded in its component.Just create validation process
Good beginner reference might be newboston videos so you understand concept.In javafx you gonna use property binding ,listeners etc often , get familiar with them as you cant avoid it.
https://www.youtube.com/watch?v=s8GomyEOA8w
https://www.youtube.com/watch?v=6Zi2L0kHSx4
Since you've given no code I can't give you answer that involves actual coding, because I've got no way of knowing whether or not what I give you will be viable or conflict etc..
In regards to the validation that depends entirely on how your accessing a username/password to compare it to what the user has entered and with out knowing how you're thinking of doing it I cannot give you a good answer.
There are quite a few options to display your red x, you could draw it internally etc..
But the easiest is probably going to be creating an image and importing it to your project, you can set a label next to your JTextField and have the picture set to that lable. Once the user inputs the username/password if either or both are incorrect you could have a method that would set the label to be visible.
The message box is as simple as a tooltip that you could also place on the label which would tell the user that the information they entered is wrong.
Related
I am creating a log in form in Java. I have already completed the entire structure of the program, as well, I have designed it's purpose and perfected it's functionality. However, now I am focusing on styling the program. I'm proud of it as it is and it's fine if I don't add this feature, however I really would like to and cannot discover how.
In summary, when a username is typed into the login form, I have a void that runs after the JTextField loses focus. This void searches for possible invalid characters such as spaces. I can successfully change the color of the border on my JTextField, and other attributes I wish to change, however I also would like to have a small dialogue box to hover over the JTextField to say what specifically is wrong with what was typed. (e.g. "Your username cannot contain spaces!").
Ideally, it would be a rectangle that could simply be filled with text, and only appear when the username is deemed incorrect, and be able to disappear when it is fixed ( I can handle the appearance and disappearance most likely, I just need help with creating this box thing ).
Is there any such thing as like a "JHoverBox" or something that I could add to my JTextField?
Well, you can have, as Gene said, a label that's normally empty near the text field, but you can have it coloured like the background colour. This will make the user not able to see it, and when you detect something wrong, you can change the colour and add the text. Simple!
I am able to use WindowsAccessBridge.dll to get access to java window (SwingSet2), and use the dll methods to interact with the controls.
I can iterate the tree (of java controls) using code shown here, and get information from the controls,
and I can do actions like SetText in Text box, or send click action to a button etc.
However, I am finding that the accessibility contexts are not consistent:
The SetText method works perfectly when I use the accessibility context got from the 'setMousePressedFP' method of the dll, after clicking on the text box.
However, I cant use the accessibility context got by iterating the control tree when trying to set text in a text box, although I verified that the other information e.g. size and other properties of the text box is same.
From this doc:
"The functions GetAccessibleContextAt and
GetAccessibleContextWithFocus retrieve an AccessibleContext object,
which is a magic cookie (really a Java Object reference) to an
Accessible object and a JVM cookie. "
However, the accessibility context differs everytime I click on the text box (without restarting the java program). The vmID matches eveytime.
If the AccessibleContext is really a Java Object reference, shouldnt I get the same AccessibleContext number everytime I click on the same control (without restarting the java window) ? and shouldnt that AccessibleContext number also be available in the tree?
Worst part is that the settext method doesnt work when I use the AccessibleContext got from iterating the control tree.
Edit to clarify the question further:
I am clicking on the same text box, so I would expect the windowsaccessdll function to return reference to the same control. As a long value the accessibeContext is different everytime I click, but its ok as the SetText method works everytime with the different long values and I can see the new text set in the text box.
The problem is when I iterate the control tree and the accessibility context got from the tree iteration doesnt work for the SetText method.
More specifically - how does the AccessibleContext compare to a c pointer - the c pointer would always be same when I get it for a specific control. The AccessibleContext appears to be a 8 digit long value that is different by few tens or hundreds based on where the mouse is clicked inside the text box.
Thanks in Advance.
I need to build a View which has a 4 layer nested Multi-Accordion with a lot of checkboxes inside them. All together there might be around 30-40 Checkboxes all through the Accordions.
The next step will be, that i have some sort of logic behind all this. Depending on the selection combination of the checkboxes I will change a text label accordingly.
My thought process was: I put up all these checkboxes and give them a numeric fx:id representing there position in the nested accordion graph. Something like "1_1" or "2_4_1".
After that, I build one ChangeListener calling a Method on Selection of a Checkbox. I can look up the Id of the checked box, look it up in my data (to see which Text belongs to it and if any rules interfer with other boxes) and handle the logic accordingly while putting the id and its text in a Map or List to keep it for later and to keep track of the checked boxes.
Now I came to know, that getting the fx:id isnt something JavaFX wants me to do. I cant deliver a custom id in custom property inside the FXML either (couldnt find anything regarding this).
I am now pretty much at the end of my knowledge (I did just start with JavaFX and have some basic Java knowledge) and it seems to me, that I tackle this topic from the wrong side.
My question is now: What would be a best practice to handle dozens of checkboxes and trigger logic in the code according to the box that was checked without writing a ChangeListener for every single Check Box leaving me with some (imo) ugly code all the way.
EDIT: I forgot to mention: I did achieve some sort of functional solution by writing a custom CheckboxChangeListener with a reference to the Element the addListener method was called on and using "getId()" on this reference. I came to know though, that this method references the css:id of the fxml element and not its fx:id and I am not quite sure if this is a proper way to go
You should look into databinding with javafx. For example:
CheckBox cb1 = new CheckBox("1");
CheckBox cb2 = new CheckBox("2");
BooleanProperty isCb1Selected = cb1.selectedProperty();
BooleanProperty isCb2Selected = cb2.selectedProperty();
Textfield foo = new TextField().visibleProperty().bind(isCb1Selected.and(isCb2Selected));
This would hide the textfield foo if atleast one of the checkboxes isn't selected.
You can find other examples here and here an oracle tutorial
I want to generate a clickable event from text area which contains a list of names of people. When we click on a certain name it must make a call to a method (which in turn is going to display the details of that person from a XML file).
Is this possible with text area? I have heard about JTextPane, but I need some other option.
Yes it's possible. Use viewToModel() method to get offset for the clicked point. Then use Utilities to getWordStart/getWordEnd methods to get the clicked name. Then just pass the name into desired function.
I am creating a SQL editor. I am using JTextPane for the editor. I want to implement AutoCompletion for table name etc. like Eclipse.
I think the appropriate class for displaying info on top of another component is JPopupMenu, which already handles layering correctly to display itself. JPopupMenu has a show() method that takes its 'parent' component as an argument, and it will show itself in that component's coordinate space. Since you want to display a selection of terms for the user to choose from, a menu seems appropriate.
To check for text changes, you'd add a DocumentListener to the document that's wrapped by the JTextPane; you can access it using getDocument().
To find out where the cursor (actually, the caret) is, you can use getCaretPosition(). That returns the caret's position within the text stream as an int. You can use modelToView() to translate that position to actual (x,y) coordinates. That in turn will tell you where to show your menu.
You can use addKeyListener() to catch keyboard events on your JTextPane, like hitting Ctrl-Space.
The combination of all that should allow you to do what you're looking to do.
You can also use http://fifesoft.com/autocomplete/. You can install it on any JTextComponent.
For things like this you probably should consider layered panes so your auto-complete suggestions appear in the correct place and z-order.
Furthermore you will have to look for changes in the JTextPane to know when the user is typing and you will need a parser that understands what is typed so you can offer the feature only at appropriate points.
It's not quite clear what exactly your problem is and what you got so far.
I achieved this by adding a key listener to the JTextPane and checking for CTRL + Space keystrokes. When the appropriate key combo was detected the listener went off and looked up the list of possible matches based on the characters directly to the left of the cursor at the time of the key press and found the best matches and displayed them to the user in a JPopup. If there was an exact match then it simply replaced the partial text with the match. If no matches were found an option was given to the user to add the text that they had already typed, edit it and record it into the list of acceptable data.
We use jide. They have a lot of components that help you do this kind of thing really easily