Hi, what is the easiest way to listen for key presses from the user? Specifically I am writing an image viewer program that uses a JFileChooser to select images and on the left side, a JList that shows the contents of the director. I would like to make the arrow kets (left/right) move to the next/previous file. Thank you in advance. ...
Using Swing on Java 6u16, WinXP SP3 Hello to all. I need some help, please, with the following case. Basically I use a JTable inside a JScrollPane, that on the scrollPane I apply component orientation of right-to-left. The final result that I get is such that the table is indeed is attached to the right, but the header is placed to the ...
I have a JPanel that I have created a MouseListener for and I am seeing some behavior that I can't explain. Usually when I click the mouse within the JPanel, I see the following events fire: mousePressed mouseReleased mouseClicked On some occasions, I don't see the mouseClicked event fire, I only see: mousePressed mouseReleased I...
I have a Mac mini with 2GHz-Core2Duo/2GB RAM and a HP-Notebook running Windows 7 with identical hardware. For our Java desktop application I'm using Quaqua and Windows look and feel, respectively. On OS X the whole application feels much more sluggish than the one running on Windows 7, especially the rendering. Are there some options fo...
I am writing program which draw table by drawing multiple rectangles. The row and col of the table are set at run-time. So how do i know the size of the jpanel to display the table? ...
I am making a GUI using SpringLayout using the following code: private void createAndShowGUI() { frame = new JFrame("A GUI"); frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); frame.setResizable(false); Container contentPane = frame.getContentPane(); SpringLayout layout = new SpringLayout(); cont...
I have a custom editor composed of several components. Something like: class MyCellEditor extends AbstractCellEditor implements TableCellEditor { JTextArea textArea; JButton button; JPanel panel; MyCellEditor() { textArea = new JTextArea(); button = new JButton(); panel = new JPanel(new BorderLay...
I want to override isEnabled() method in java.awt.Component and use it with a JTextArea. This is what I do. This code snippet is called inside the Jframe constructor. jTextArea1 = new javax.swing.JTextArea(){ @Override public boolean isEnabled(){ if(getForeground()== new Color(0, 0, 0)){ ret...
My question is it possible to port Swing into .Net world? Or a project like this has already been started. If it is not possible, can anyone please shed some light on the reason? ...
I am adding Jbutton to a table by extendibg AbstractCellEditor class. But on click of button the text doesnt change from "Start" to "Stop" .here is the class i implemented public class ButtonEditor1 extends AbstractCellEditor implements TableCellEditor,ActionListener,TableCellRenderer{ JButton btnSTART = new JBu...
How can I instruct my Swing component to grab focus right now? requestFocus() doesn't seem to be dispatched instantly. Ideally, I would like this (ran from EDT): textInput.requestFocusInWindow(); System.out.println(textInput.hasFocus()); To print true. Below is the SSCCE. Notes/requirements: Table is navigated with keyboard. Colum...
I'm using drawLine() and friends to paint a graph onto a JPanel. There are tens of thousands of points to graph, so it takes 3-5 seconds. I want to have a viewport, like the blue one illustrated below, over the graph. I would like this viewport to be updatable, as I have a MouseMotionListener on the JPanel that the graph is on. The pr...
I am attempting to implmement smart autoscrolling on a JScrollPane containing a JTextPane. The JTextPane is used for logging my app in color. However I'm running into a wall trying to do smart autoscrolling. By smart autoscrolling I don't mean blindly autoscrolling every time something changes, I mean checking to see if your scrolled all...
I've been trying for hours to get my drawing method to work by drawing in a BufferedImage stored in a Clojure ref, and then to have that painted onto the component (in this case a JPanel) in order to display it. Unfortunately, this isn't working well at all. My code is this (pared down, but showing the relevant parts: (defn create-gra...
I created a JFrame initialized with a BorderLayout and a JScrollPane as its CENTER element. The scroll pane is set with VERTICAL_SCROLLBAR_ALWAYS and HORIZONTAL_SCROLLBAR_NEVER policies. The intent of my frame is to have a controlled width, while the height should grow/shrink as data is added/removed. Inside my scroll pane, I added a ...
Hi. I created a Swing GUI using netbeans, and when I try to manually do the following: # ls myProg.form myProg.java # javac myProg.java # ls myProg$1.class myProg$2.class myProg$3.class myProg$4.class myProg$5.class myProg$6.class myProg.class myProg.form myProg.java It created those extra classes. Why is this happening? Is th...
I Have a JButton (or any Component, really) that I would like to trick into thinking that it has been clicked on and therefore firing its action performed event. I don't want to call the action performed or doClick directly because I am trying to make a solution that generalizes beyond buttons, and I am constrained to posting events. I ...
Hi chaps, I think I'm being a bit of an idiot, given that I haven't done Swing programming in a while, but I'm trying to draw a simple image to screen, and I'm not getting what I expected public class ImageApp { public static void main(String[] args) throws MalformedURLException, IOException { final Image image = ImageIO.re...
I have an image I am rotating when the user clicks on a button. But it is not working. I would like to see the image rotating gradually to 90 degrees till it stops but it doesn't. The image must rotate 90 degrees gradually when the button is clicked. I have created an SSCCE to demonstrate the problem. Please replace the image in the Cr...
I have a JTree like this: MasterRoot +-RootA +-ChildA1 +-GrandChildA1a +-RootB +-ChildB1 +-GrandChildB1a I don't want the MasterRoot node to be displayed But if I call `configTree.setRootVisible(false); I got: RootA +-ChildA1 +-GrandChildA1a RootB +-ChildB1 +-GrandChildB1a And I want this: +-RootA +-ChildA1 +-Grand...