My app needs to display information (lines and rectangles). I was thinking of using JPanel, but I am not sure.
The problem is that the information is stored in a DB, but when the app is launched, eventually new information will get into the DB, and should be displayed as well. Also, the existing displayed information must remain.
Also, it would need at leats two zones for displaying info. One for lines and another for rectangles. Both with the problem of incoming information.
What is the (best) way to add new elements to a graphic without loosing what has been displayed before?
Have a look at Canvas and Graphics (Tutorial). You need to add the Canvas to a JContainer for example JPanel. With JDBC you can connect to a Database and execute SQL Statement.
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I have been researching this for days and have tried everything I have come across, but to no avail. I have built an item checkout system in JAVA using a Derby Embedded Database and everything that I have wanted it to do works great. The only thing I can't get to work is having my table update or refresh the information displayed after the user (A) Adds a new entry in the system due to a customer checking out an item. (B) A customer returns an item and is checked back into the system. (C) The table data is changed/fixed due to a previous user error. Case in point: The user checks out an item using the check out dialogue box, then clicks the check in dialogue box but the new entry just made, does not appear. Closing out of the program and going back into it then shows the new information.
I have a method called loadTable() that makes the DB connection all the way through building the table how I want and returns the table.
So far I have tried:
- Calling the loadTable() on any event (Button pressed, window closed, etc).
setFireTableDataChanged() method.
table.setModel(), here I tried inserting the loadTable().getModel or using a temp table.
jtable.tableChanged(new TableModelEvent(jtable.getModel())).
SwingUtilities.updateComponentTreeUI(yourJScrollPane); Ultimately it gets added to JSP.
table.UpdateUI();.
((DefaultTableModel)table.getModel()).fireTableDataChanged();.
repaint().
revalidate().
So far everything I have tried, does not produce the desired results.
I know you all will want to see code, there's a lot so I don't know what I should start with. This is my first time posting so, have mercy on me if i'm going about this the wrong way. Many thanks in advance!
I'm making a Java Swing application, which loads data from a MySQL database and puts it in a Gantt Chart (I'm using the swiftgantt 4.0 library for this).
I have a start window from where you can instantiate multiple JFrame objects which contains a Gantt chart, you can select from the start window what data you want to retrieve from the database.
The program opens the frames with the charts correctly generated, but the problem is, that at certain action e.g.:resizing the window, or scrolling, or clicking on the chart, the content of the last frame appears in the other frame.
If I use the refreshing function of the Gantt chart, the content switches back, to the original content, but I think it's not a good solution to put the refreshing function
to all events where this anomalies happen.
Does anyone have a clue what's happening here?
I'm thinking of some event handling of the frames, might mix up the charts of the windows, but I'm not sure what causes this.
everyone.
I'm currently working on a project which is written in Java. As one of my features I want the application to display List of workout plans that are saved in the databases. Furthermore, I want the user to be able to click on particular instance of the workout Plan so that new JFrame is opened with further details which will be populated from the database.
You can see what I mean in the picture below, this is how I want my list to look like.
For this application I'm using Swing components to model my GUI. Its very important for me that those items within a list will act as a button so that you can open up new JFrame, but at the same time the content must be populated from database. Also when a new Workout Plan is added to the database the list must be updated and the item that will be added to that list has to be of the same format.
My question is whether it's possible to design that kind of list using Swing components, and if it is how would you do it.
Any suggestions or help will be appreciated.
I'm not that familiar with swing but, I think you can set your panel into a grid layout. Then divide the grid layout so that there are, for example, 10 rows and 1 column. Afterwards, fill the grid layout with JButton's. Whenever a button is pressed, it will open up a JFrame.
I feel like there's a better way to do this though.
I intend to write a XSL-FO designer in java for which i need to write an UI. The basic idea is to give the user a work pane wherein he/she can draw rectangles and these rectangles would in turn be associated to field containers in the underlying XSL-FO generator. Once the field container are done, the user should also be able to select any of the rectangles(field containers) created and add components into it. These will in turn be translated into field blocks that fall under the chosen field container.
Till now I have created a simple UI using JFames with mouseListeners hooked to them so that i can have users draw the rectangles on the work area.
Im stuck at the point on how to implement the part where the user selects one of the rectangles created in the previous steps.
Given the intent of the designer, is it possible to accomplish this using Jframes ?
Any pointers/suggestions on how i can achieve the motive of this designer would be of great help !
Please excuse me if any part of this post is noobish. I am one when it comes to UI.
JInternalFrame might be a starting point. You can connect them, as shown here, and add arbitrary components as required.
I'm working on cusomizing a Swing application by dynamically altering the UIDefaults. The end goal is to alter many of them (colors, fonts, sizes, borders, etc) and save the result on a per user basis. While it may give the application some non-standard looks, the client asketh and the client shall receive.
The only problem I'm running into is that GUI will only update ONCE. The first time I change a ui property everthing is great, subsequent changes don't affect anything.
// called from the EDT
// uiKeyName points to some ColorUIResource
UIManager.getDefaults().put(uiKeyName, <<color from color picker>>);
SwingUtilties.updateComponentTreeUI(rootWindow);
It works once, but never again. Ideas?
When you put the new color (for example) in the table, is it a Color object, or a ColorUIResource? As I understand it, the new value will only be taken up if the current value is null or an instance of UIResource. Thus, if you insert a plain old Color object, any subsequent changes you make will be ignored.
Also, as the linked doc page suggests, this may only help with the font and foreground/background colors; when it comes to changing things like borders and margins, you may be out of luck. This is not what Swing's Pluggable LookAndFeels were designed for. Maybe you could interest the client in a Synth-based LAF?