jscrollpane

问题 I have a JPanel within a JScrollPane. In my program, the JPanel shows an image of map and it shows the current location of a vehicle. My program receives the location and current direction of the vehicle. I need to show this on the map. I'm having a problem showing the direction of the vehicle. I want to show an arrow on the top left of the map's visible area to show the direction. The following is the code that I have tried. But it throws an exception when I scroll down. Exception in thread

问题 I am hoping to incorporate custom scrollbars in my site as there are divs with set heights that will overflow. I have managed to get exactly what I want using webkit styling in css however I am aware that there will be issues when looking at the site in Firefox or IE. As a result, I tried to incorporate the jScrollPane library into my site but its causing all sorts of js "clashes" which is throwing the whole site into a mess! Are there any simpler methods to customise my scroll bar so that I

问题 All Swing components in my app (except labels) have tooltips that can be annoying once the user knows what's going on, so I have a Preferences menu that allows turning them off. I could name every component and set its tooltip text to "" [e.g., txtPattern.setToolTipText(""); ] (and 10 others), but I decided (with SO aid that started awhile back) to write code that would be more elegant (a learning experience): private void tipsOff(Container container){ Component [] c = container.getComponents

问题 How to make JTextArea scroll so caret position is always displayed as user types more text? This seems like a stupid question to me and I feel like it must have been asked before, yet I have searched and cannot find the answer. I have a multiline text area, embedded in a JScrollPane . If the user keeps typing until he fills the text area, eventually the caret becomes invisible (below the area shown) and the user cannot see what he is typing. It seems odd that this would be the default

问题 My question is similar to this one (How to get JScrollPanes within a JScrollPane to follow parent's resizing), but that question wasn't clear and the answer there didn't help me.. I have this SSCCE (using MigLayout): public static final int pref_height = 500; public static void main(String[] args) { JPanel innerPanel = new JPanel(new MigLayout()); innerPanel.setBorder(new LineBorder(Color.YELLOW, 5)); for(int i = 0; i < 15; i++) { JTextArea textArea = new JTextArea(); textArea.setColumns(20);

问题 I've got a JTable that updates frequently. It sits inside of a scroll pane. Occasionally we'll see a message that we'd like to dig deeper into. Unfortunately due to the number of updates the message will scroll off the visible screen before we can finish looking at it. I'd like to be able to freeze the viewport/scrolling while we examine the message but still allow the table model to update with new messages. I can get the selected row to go to the top with this code: int firstSelectedRow =

问题 I'm creating a simple gui of options that containing a JScrollPanel. The problem is when I'm scrolling all the content of the JPanel inside my JScrollPanel doesn't refresh like that : Bad Refresh Scrolling Another issues is that not all my text fields are well painted and the combobox fields are behind the first text field. Here my code : OptionsPanel.java the source of the problem package scroll; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.event

问题 Can someone work out why my JScrollPane is not working. Perhaps something I may have missed. I realize this might be silly without any more context than what I've shown but please ask and I shall be happy to provide more. public ApplicationFrame(String title, int x, int y, int width, int height) { // Constructor for the ApplicationFrame, no implicit Construc. setTitle(title); setResizable(true); setBounds(x, y, width, height); setLayout(new BorderLayout()); setDefaultCloseOperation(DISPOSE_ON

问题 Say, I have a big JComponent: Dimension componentSize = new Dimension(5000,5000); And a smaller JScrollPane: Dimension scrollPaneSize = new Dimension(500,500); I want to display part of my JComponent in JScrollPane, like on the picture below: White rectangle is my JScrollPane, which currently displays part of JComponent from (x1,y1) to (x2,y2) . So, what have I tried: I have created a new JComponent: JComponent component = new JComponent(){ protected void paintComponent(Graphics g) { // Here

问题 Please see the following block of code import java.awt.Color; import java.awt.Dimension; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JSplitPane; public class test extends JFrame { public test(){ this.setBounds(0,0,300,700); JPanel pnltemp= new JPanel(); //pnltemp.setBounds(0,0,400,1000); pnltemp.setPreferredSize(new Dimension(400,1000)); JScrollPane scrtemp= new JScrollPane(); scrtemp.getViewport().add(pnltemp); this.getContentPane(