I am Using following code,
StringBuffer sb1 = new StringBuffer("<html>Map Following data:\n WTXFF,WTXF");
JScrollPane scrollPane = new JScrollPane(new JLabel(sb1.toString())); Object[] options = new Object[] {"ShowMappingTable" , "Cancel", };
int answer = JOptionPane.showOptionDialog(getWindow(), scrollPane, "Error ", JOptionPane.YES_NO_OPTION,
JOptionPane.ERROR_MESSAGE, null, options, null);
How can I add Hot keys to the ShowMappingTable and Cancel button.
I greatly appreciate your help.
Thanks
I think you have to make a completely custom dialog to be able to assign your own accelerators. Unfortunately that usually requires much more coding.
Check Oracle's tutorial for the best alternative for you.
Related
I am trying to add a navbar (just like bootstrap's) for a Spring application but am not getting the nav menu to appear on the web page!
Can anyone please tell me what's wrong here?
Below is my code:
private Panel viewContainer;
private HorizontalLayout navbar;
private Button btnHome;
private Button btnNested;
private Button createNavigationButton(String caption, final String viewName) {
Button button = new Button(caption);
button.addStyleName(ValoTheme.BUTTON_SMALL);
// If you didn't choose Java 8 when creating the project, convert this
// to an anonymous listener class
button.addClickListener(event -> getUI().getNavigator().navigateTo(
viewName));
return button;
}
#Override
protected void init(VaadinRequest request) {
final VerticalLayout root = new VerticalLayout();
root.setSizeFull();
navbar = new HorizontalLayout();
navbar.setWidth("100%");
navbar.setDefaultComponentAlignment(Alignment.MIDDLE_RIGHT);
root.addComponent(navbar);
final Label brand = new Label("Nested demo");
brand.addStyleName(ValoTheme.LABEL_H1);
brand.addStyleName(ValoTheme.LABEL_NO_MARGIN);
navbar.addComponent(brand);
navbar.setComponentAlignment(brand, Alignment.MIDDLE_LEFT);
navbar.setExpandRatio(brand, 1);
btnHome = new Button("Home", FontAwesome.HOME);
btnHome.addStyleName(ValoTheme.BUTTON_BORDERLESS);
navbar.addComponent(btnHome);
btnNested = new Button("nested", FontAwesome.COFFEE);
btnNested.addStyleName(ValoTheme.BUTTON_BORDERLESS);
navbar.addComponent(btnNested);
viewContainer = new Panel();
viewContainer.setSizeFull();
root.addComponent(viewContainer);
root.setExpandRatio(viewContainer, 1);
}
Any hint is much appreciated.
Thanks
Henri's comment is almost certainly the correct answer.
Judging by the init(VaadinRequest) code you're using a UI class.
Without setContent(some components with visible stuff in them);
you won't see anything.
'you won't see anything' happens a lot in Vaadin when you're attempting new things, or doing proof of concept stuff. IMHO it's always a good practice to start with really dumb UI stuff e.g. setContent(new Label("TODO - implement this content-xxx"));
Using browser dev-tools is also a great idea. A quick select-element should show you that the UI div is empty, and allow you to start diagnosing.
TL;DR :-
UI is a ComponentContainer, so you need to - either
setContent(myLayoutWithStuff);
or
getContent().addComponent(myStuff);
to show someStuff.
I was reading a tutorial on how you can make a turret follow the mouse, for a game, and I stumbled across something I've never seen before.
private function showGhostTurret(e:MouseEvent = null):void
{
var target_placeholder:Sprite = e.currentTarget as Sprite;
ghost_turret.x = target_placeholder.x;
ghost_turret.y = target_placeholder.y;
ghost_turret.visible = true;
}
I've never seen someone set the (e:Event) to null, like in the first line. Could someone please explain the purpose of doing this? Let me know if you need more information to answer.
Thanks.
That is a default parameter value. What it means is that the parameter e is optional so you can opt to not include it in a call to showGhostTurret() and e will be assigned the value null.
I'm not sure how that's useful in this particular case since, looking at the body of the function, e is most definitely required. You said this was part of a tutorial -- maybe it becomes useful later on?
I need to create a variable:
var numDots0:Number=0;
But when a button is clicked the variable numDots0 becomes numDots1, then numDots2 on a second click, and so on. I then need to be able to grab that new variable name and use it in a function.
That's a really, really weird request, but anyways:
You can use the key name of an Object to store the property and then change that:
var obj:Object = { numDots0: 0 };
And then when you want to change the name:
delete obj.numDots0;
obj.numDots1 = 1;
Or to easily increment you can use this:
var i:int = 0;
function increase():void
{
delete obj["numDots" + i];
obj["numDots" + (++i)] = i;
}
To access:
trace(obj.numDotsX); // where X is the most recent variable name.
I see absolutely no benefit or need for this, so I strongly suggest taking a look at what you're trying to do and making sure it makes sense and doesn't have a different application.
I am pretty sure you are going the wrong way about the problem you are trying to solve. Dynamic variable names are not something you read in the best practices book.
Anyway to answer your question in AS2 you could use the command eval which would evaluate a string as ActionScript, so you would use something like:
function onClicked(e:MouseEvent):void
{
counter++;
eval("var numDots" + counter +"+:Number=0;");
}
In AS3 that command has been removed (because it leads to bad coding practices - like the things you are trying to do), nevertheless someone implemented an evaluator in AS3:
http://eval.hurlant.com/
With this evaluator add the library to your project and add the following to the snippet above:
function eval(expression:String):void
{
var evaluator:com.hurlant.eval.Evaluator = new com.hurlant.eval.Evaluator();
var bytes:ByteArray = evaluator.eval(expression);
bytes = ByteLoader.wrapInSWF([bytes]);
var context:LoaderContext = null
var loader:Loader = new Loader();
loader.loadBytes(bytes, context);
}
the answer is to not do what you are trying to do and use an array, hash or vector instead. give us a bit more context, or the reason you want to achieve exactly what you want to and why you might believe you'd need a dynamic variable name like that. you shouldn't be using evals or anything that changes variable name at runtime because the gods of programming will strike you down where you stand. i.e., your program is going to break, and when it does, it's going to be harder to debug for sure.
if you are sure this is what you want to do, then i'm wrong, haha. good luck!
I have created a JTable with 5 columns in it .I want the sixth column to have all cells as JComboBox from where an user can select his choice and the change will get appended in databasefor which i need a button on whose action i can fire the query to my database. So please please let me know how to add JComboBox and ButTon on JFrame...?? I am very new to Swings so do let me know how to get this donea detailed explanation about the same will be very thankful...!!! Thanks in advance..!!!
How to add JComboBox and JButton on a JFrame is rather trivial. Linking this question to the first part of your question with the table is something I did not manage. But for the part I did understand, you can have something like
JFrame frame = new JFrame( "TestFrame" );
JPanel contents = new JPanel( new BorderLayout() );
JComboBox comboBox = createComboBox();
contents.add( comboBox, BorderLayout.CENTER );
JButton button = createButton();
contents.add( button, BorderLayout.EASTH );
frame.add( contents );
frame.pack();
frame.setVisible( true );
The code illustrates how to add a combobox and a button. Note that I opted for the very simple BorderLayout. Other layouts are certainly possible, but it all depends on the requirements of your layout.
I am currently doing an application using Swing and i am stuck at a certain point. In my function, i have to link videos from a JList. The problem is i am not sure how to link the videos from the JList. I am using an OpenBrowser class to link the video to the internet. I did consider using JButton but i would have to hardcode it and that would be ugly. Is there any other alternatives to do this? I am in desperate need and would be eternally grateful to whoever that can help me.
Safa :)
If you don't want to open a browser with the video using a selection listener, you can consider the idea of launching it with a double click on a JList entry.
sample code
String[] items = {"i1", "i2", "i3", "i4"};
JList list = new JList(items);
list.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
JList list = (JList)evt.getSource();
if (evt.getClickCount() == 2) { //check if it is a Double-click
int index = list.locationToIndex(evt.getPoint());
// do whatever you want with the entry at that index
}
}
});
Desktp classes to browse some site (sample code):
if (desktop.isSupported(Desktop.Action.BROWSE)) {
URI uri = new URI("http://www.google.com");
desktop.browse(uri);
}
The desktop.browse() call will open your favourite browser with the given URL.