Problem with scrollbar of ScrollPane
i added a Jpanel in the JScrollpane. Size of the JPanel is more then JScrollPane. my problem is that scrollbar are not functional and so my Jpanel is not completely visible in the Jscrollpane.
tell me how to do it
use setPrefferedSize(....) to set the size of the JPanel !!
Noah
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Problem with ScrollPane and JFrame Size
Hi,
The code is workin but after change the size of frame it works CORRECTLY.Please help me why this frame is small an scrollpane doesn't show at the beginning.
Here is the code:
import java.awt.*;
public class canvasExp extends Canvas
private static final long serialVersionUID = 1L;
ImageLoader map=new ImageLoader();
Image img = map.GetImg();
int h, w; // the height and width of this canvas
public void update(Graphics g)
paint(g);
public void paint(Graphics g)
if(img != null)
h = getSize().height;
System.out.println("h:"+h);
w = getSize().width;
System.out.println("w:"+w);
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// System.out.println("Size= "+this.getSize());
g.drawImage(img, 0,0,this.getWidth(),this.getHeight(), this);
int width = img.getWidth(this);
//System.out.println("W: "+width);
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//System.out.println("H: "+height);
if(width != -1 && width != getWidth())
setSize(width, getHeight());
if(height != -1 && height != getHeight())
setSize(getWidth(), height);
}I create frame here...
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
public class frame extends JFrame implements MouseMotionListener,MouseListener
private static final long serialVersionUID = 1L;
private ScrollPane scrollPane;
private int dragStartX;
private int dragStartY;
private int lastX;
private int lastY;
int cordX;
int cordY;
canvasExp canvas;
public frame()
super("test");
canvas = new canvasExp();
canvas.addMouseListener(this);
canvas.addMouseMotionListener(this);
scrollPane = new ScrollPane();
scrollPane.setEnabled(true);
scrollPane.add(canvas);
add(scrollPane);
setSize(300,300);
pack();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
public void mousePressed(MouseEvent e)
dragStartX = e.getX();
dragStartY = e.getY();
lastX = getX();
lastY = getY();
public void mouseReleased(MouseEvent mouseevent)
public void mouseClicked(MouseEvent e)
cordX = e.getX();
cordY = e.getY();
System.out.println((new StringBuilder()).append(cordX).append(",").append(cordY).toString());
public void mouseEntered(MouseEvent mouseevent)
public void mouseExited(MouseEvent mouseevent)
public void mouseMoved(MouseEvent mouseevent)
public void mouseDragged(MouseEvent e)
if(e.getX() != lastX || e.getY() != lastY)
Point p = scrollPane.getScrollPosition();
p.translate(dragStartX - e.getX(), dragStartY - e.getY());
scrollPane.setScrollPosition(p);
}...and call here
public class main {
public main(){}
public static void main (String args[])
frame f = new frame();
}There is something I couldn't see here.By the way ImageLoader is workin I get the image.
Thank you for your help,please answer me....I'm not going to even attempt to resolve the problem posted. There are other problems with your code that should take priority.
-- class names by convention start with a capital letter.
-- don't use the name of a common class from the standard API for your custom class, not even with a difference of case. It'll come back to bite you.
-- don't mix awt and Swing components in the same GUI. Change your class that extends Canvas to extend JPanel instead, and override paintComponent(...) instead of paint(...).
-- launch your GUI on the EDT by wrapping it in a SwingUtilities.invokeLater or EventQueue.invokeLater.
-- calling setSize(...) followed by pack() is meaningless. Use one or the other.
-- That's not the correct way to display a component in a scroll pane.
Ah, well, and the problem is that when you call pack(), it retrieves the preferredSize of the components in the JFrame, and you haven't set a preferredSize for the scroll pane.
Please, for your own good, take a break from whatever it is you're working on and go through The Java™ Tutorials: [Creating a GUI with JFC/Swing|http://java.sun.com/docs/books/tutorial/uiswing/TOC.html]
db -
Problem with window repaint and scrollbars in edit mode (LabVIEW 8.0.1)
I am running LabVIEW 8.0.1 in Windows XP SP3. For my main VI, I ran into a strange problem about 5 months ago. The front panel window - in both edit mode and run mode - stopped repainting itself on the right side which is most visible when you scroll up and down, but also visible with overlapping windows. Coincident with the repaint problem, both scrollbars look disabled with greyed-out arrows and no boxes in the bars that you can click and drag to scroll the window. The scrollbars still partially work if you hover the mouse over them and roll the mouse wheel but clicking and dragging doesn't work.
The front panel has lots of controls and indicators including tab-control containers and is larger in the horizontal and vertical directions so both scrollbars should be active. But I deleted all elements on the front panel and everything in the block diagram and the problem persists. So the problem is not directly related to some control/indicator display.
I saved the simple VI with this problem (using a wide text line and a tall rounded box to test), then created a new VI and copied the two elements to the new VI. This new VI does not have the repaint and scrollbar problem. The two VIs differ slightly in memory usage and in revision number (the bad one is revision 1785 and the good one is revision 3), but otherwise the two VIs are identical. I attached both VIs to this posting. When you first open the bad VI, you'll see the disabled scrollbars whereas the good VI has active scrollbars. To replicate the repaint problem, scroll the window up and down with your mouse wheel. If it's fine when you first open the VI, click on another window, then click back on the VI window and try the mouse wheel again. This clicking-away-and-back always causes the repaint problem for me. I tried the VIs on two different computers both running Windows XP SP3 and LabVIEW 8.0.1 with identical results.
Here's what I discovered from troubleshooting with the simple VIs:
* scrollbars always disabled
* repaint problem in main window for window widths larger then 680 pixels
* repaint problem in main window menu toolbar for widths larger than 646 pixels
* entire window becomes disabled for window widths larger than 1348 pixels
* can repaint window by minimizing and restoring, but only repaints that one time
* scrollbar boxes sometimes flicker into view but then disappear
* scroll left and right by hovering mouse over horizontal scrollbar and using mouse wheel
I found something similar on this forum (thread: Problem with front panel refresh) - it might be related to the CAR about the panel being offset internally. I don't have access to LabVIEW 8.5 or later and don't plan to upgrade - I haven't tried the trial version as that user did. I could try to copy and paste my entire block diagram to a new VI but the VI is so large I'm afraid something would break, plus I don't want this to happen again in a few months. The problem seemed to occur after a certain number of saves (or revision number). I save backup copies often and when the problem first happened, I was able to go back to a previous version, make the missing changes and save it with no problems, but this only delayed the problem and it came up later. So maybe it's the revision number. It didn't seem related to a particular addition or modification in the front panel or diagram.
The image attached shows the repaint and scrollbar problems in the bad VI.
This brings up a question I have - if this problem is a bug and was fixed in 8.5 and later, is there a way to apply bug fixes to earlier versions? Or do I have to pay for an upgrade to fix such bugs?
Solved!
Go to Solution.
Attachments:
RepaintTest_Bad.gif 27 KB
Test Repaint - From Bad VI, scrollbar and repaint problems.vi 7 KB
Test Repaint - From Blank VI, no problems.vi 5 KBSeems something got corrupted with this VI. Copy things over to a fresh VI and things should be OK.
See also this recent report of a similar issue.
LabVIEW Champion . Do more with less code and in less time . -
Problem with datagrid horizontal scrollbar
Hi all,
I am facing problem with Datagrid HorizontalScrollBar.
As per requirement i need to seperate the Horizontal and verticalscroll bars from grid.
So what i did was, i created HScroll & VScroll components and associated them Datagrid scroll bars. I made HorizontalScrollPolicy and VerticalScrollPolicy "off" for datagrid.
As i binded values to HScroll & VScroll components which are out side of datagrid, i should be able to scroll datagrid using those components.
Its working fine for VScroll. When i scroll VScroll component am able to scroll datagrid vertically.
Problem is with HorizontalScrollPolicy in datagrid, when i change the policy to "on" i can see the scrollbar down to datagrid and able to scroll. once i change the policy to "off", datagrid columns are getting resized and datagrid width will set back to its container width without scrollbar, because of this there will be no HorizontalBar for datagrid to assiciate with HSCroll Component.
Code given below:
[AS]
private function vScrollGrid(event:ScrollEvent):void
mainTable.verticalScrollPosition=vScrollBar.scrollPosition;
private function hScrollGrid(event:ScrollEvent):void
mainTable.horizontalScrollPosition=hScrollBar.scrollPosition;
}[/AS]
[CODE]
<mx:HBox height="100%" verticalScrollPolicy="off" horizontalScrollPolicy="off">
<mx:DataGrid dataProvider="{reportData}"
id="mainTable"
height="100%"
width="100%"
textAlign="right" allowMultipleSelection="true" visible="false" verticalScrollPolicy="off" horizontalScrollPolicy="off"/>
<mx:VScrollBar id="vScrollBar" height="100%" pageSize="1" scrollPosition="{mainTable.verticalScrollPosition}" maxScrollPosition="{mainTable.maxVerticalScrollPosition}" scroll="vScrollGrid(event)"/>
</mx:HBox>
<mx:HScrollBar id="hScrollBar" height="100%" pageSize="1" scrollPosition="{mainTable.horizontalScrollPosition}" maxScrollPosition="{mainTable.maxHorizontalScrollPosition}" scroll="hScrollGrid(event)"/>
[/CODE]
Please help me to resolve this
Thanks & Regards
Pratap1. Try calling setEnabled(true); on the scrollbar
2. Check that you need to scroll. If efffectively the knob (as the API docs call it) is larger than the scrollbar, it probably won't be shown. -
Scrollbar problem with JTable.
Hi,
I have 45 columns in a JTable. Please remember this is customize, we can change the number of columns dynamically, at max they can be 2 columns.
i was having a problem with display the columns names in my Frame. I posted at http://forum.java.sun.com/thread.jspa?threadID=5167358&messageID=9641265#9641265
I got the solution. Thanks for that.
But as i said these columns are customized.
when i am having 2 columns in my JTable, table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF ); is behaving differently, it's not occupying the complete JFrame. Lots of space is left out beside these 2 columns.
When i comment this line, then those 2 columns are occupying my complete Frame.
these two colmns should occupy my complete Frame and if i select 45 columns i should get scroll bar at botton with complete column NAMES.
Hope i am clear.
My Snippet
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.util.*;
public class SimpleTable extends JPanel {
private boolean DEBUG = false;
public SimpleTable() {
super(new BorderLayout());
String[][] values = new String[10][];
String[] columnNames = {
"First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian","First Name","Last Name","Sport","# of Years","Vegetarian"
Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)},
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
DefaultTableModel defaulttablemodel = new DefaultTableModel(data,columnNames);
final JTable table = new JTable(defaulttablemodel)
public boolean isCellEditable(int row,int column)
return false;
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane);
private static void createAndShowGUI() {
JFrame frame = new JFrame("SimpleTable");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
SimpleTable newContentPane = new SimpleTable();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}Thank You camickr, it's serving my purpose.
Just for a clarrification :
table.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
table.setAutoscrolls(false);without using these lines also my purpose is serving.....then y do we need above two lines of code. r they necessary
i mean, this snippet is sufficient.
public boolean getScrollableTracksViewportWidth()
return getPreferredSize().width < getParent().getWidth();
} -
Probleme with an unwanted horizontal scrollbar
Hi
Link of reference : http://www.episodesoft.com/demo/index_fr.html
I'm having a little difficulty with the horizontal scrollbar, i dont want it to appear since the website is designed for 1024x768 up to 2000, so obviously everything is adjusting itself depending of your viewscreen, So does the flash ( the menu and header ).
However it is the flash that cause the scrolling on the right but not on the left ??? the browser automatiquely adjust the left portion of the flash and is not creating a scrollbar for that, however i cannot find a way so it manage the right portion the same way it do the right one.
It is weird because before the header was not in flash but still 2000px and i didn't have that probleme with the CSS.
For the flash there is no CSS but here is the code. Feel free to view the source of the webpage itself
Any idea ?
Thanks a lot !
<div id="layer1" style="position:absolute; top:-10px; left:50%; margin-left:-1000px; width:2000px; height:580px; z-index:2">
<table width="950" border="0" align="center" >
<tr>
<td align="center" valign="middle">
<object id="FlashID" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="2000" height="580">
<param name="movie" value="Video/Menu.swf" />
<param name="wmode" value="transparent">
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<param name="swfversion" value="6.0.65.0" />
<param name="expressinstall" value="Scripts/expressInstall.swf" />
<param name="embed" value="wmode="transparent"" />
<param name="selectable" value="false" />
<param name="border" value="0" />
<param name="embed" value="border="0"" />
<object type="application/x-shockwave-flash" data="Video/Menu.swf" width="2000" height="580">
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<param name="swfversion" value="6.0.65.0" />
<param name="expressinstall" value="Scripts/expressInstall.swf" />
<param name="embed" value="wmode="transparent"" />
<param name="selectable" value="false" />
<param name="border" value="0" />
<param name="embed" value="border="0"" />
<div>
<h4>Content on this page requires a newer version of Adobe Flash Player.</h4>
<p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" width="112" height="33" /></a></p>
</div>
</object>
</object>
</td>
</tr>
</table>
</div>Herm oook.
I just tryed to remove the margin-left:-1000px; however when i do that, the flash start in center of the viewscreen or will no longer auto center itself.
The flash is in his own div and that div is above another div ( the content ).... so as long i put a background color in this one, it will cover all the website or the right side if i make one going from transparent to 100% on the right.
Here is the whole code to help you
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Logiciel Épisode</title>
<style type="text/css">
#bottom {
background-repeat:no-repeat;
background-position: bottom;
background-image: url(images/barre_bottom.png);
height: 5px;
#headinner {
background-position: center top;
margin-top: 0px;
margin-bottom: 0px;
background-color: #F5F6F7;
background-repeat: no-repeat;
height: 95px;
background-image: url(images/HeaderFR.png);
body {
background-color: #ffffff;
margin-top: auto;
margin-right: auto;
margin-bottom: auto;
margin-left: auto;
background-image: url(images/fond.png);
text-align: center;
background-position: bottom;
background-repeat: no-repeat;
#Copyright {
text-align: center;
margin-bottom: 1px;
margin-top: 1px;
font-family: Arial, Helvetica, sans-serif;
font-size: 10pt;
#layer2 #Layer2 tr td p {
text-align: center;
font-size: 36px;
margin-top: 100px;
<!-- margin-left: 30px;
-->;
</style>
<script src="Scripts/swfobject_modified.js" type="text/javascript"></script>
</head>
<body>
<!--<div id="headinner">
INACTIVE HEADER
</div> -->
<div id="layer1" style="position:absolute; top:-10px; margin-left:-1000px; left:50%; width:2000x; height:580px; z-index:2">
<table width="950" border="0" align="center" >
<tr>
<td align="center" valign="middle">
<object id="FlashID" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="2000" height="580">
<param name="movie" value="Video/Menu.swf" />
<param name="wmode" value="transparent">
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<param name="swfversion" value="6.0.65.0" />
<param name="expressinstall" value="Scripts/expressInstall.swf" />
<param name="embed" value="wmode="transparent"" />
<param name="selectable" value="false" />
<param name="border" value="0" />
<param name="embed" value="border="0"" />
<object type="application/x-shockwave-flash" data="Video/Menu.swf" width="2000" height="580">
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<param name="swfversion" value="6.0.65.0" />
<param name="expressinstall" value="Scripts/expressInstall.swf" />
<param name="embed" value="wmode="transparent"" />
<param name="selectable" value="false" />
<param name="border" value="0" />
<param name="embed" value="border="0"" />
<div>
<h4>Content on this page requires a newer version of Adobe Flash Player.</h4>
<p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" width="112" height="33" /></a></p>
</div>
</object>
</object>
</td>
</tr>
</table>
</div>
<div id="layer2" style="margin-top:100px" >
<table border="0" align="center" id="Layer2" name="Layer2">
<tr>
<td background="images/accueil_fond.png" width="1035" height="485" aling="right" ><img src="images/accueil2_4.png" width="950" height="485" align="left" valign="middle"/></a></td>
</tr>
</table>
</div>
<div id="bottom">
</div>
<p id="Copyright">© 2010 - Logiciel Episode Inc.</p>
<table width="10" border="0" align="center">
<tr>
<td align="center" valign="middle"><a href="index_us.html" target="_self">English</a></td>
<td align="center" valign="middle"><a href="index_fr.html" target="_self">Francais</a></td>
<!--
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JScrollPane with scrollbar as needed packs to the wrong size.
Hi!
I just noticed a strange problem when packing a JScrollPane with scrollbar policy "as needed" and wondered if it's me or if it is a real bug in Swing.
I create a JFrame with a JScrollPane in it and a JPanel as viewportview. The JPanel (called "stuffPanel") contains a few components which give it a preferred size, and the JScrollPane is set to grow as needed if the window grows. A button in the center of the stuffPanel will invoke pack() on the window when clicked.
Now, if I resize the window such that the JScrollPane can't display the entire stuffPanel, I get scrollbars as expected. If I click the pack button the window correctly resizes to the preferred size (without scrollbars).
On the other hand, if I resize the window to become larger than the preferred size and then click the pack button, the window (and the stuffPanel) is resized to include 17 pixels of extra size around the edges.
Put simply, pack() will resize the JPanel to different sizes depending on whether the scrollbars of the JScrollPane were visible at the time. Note that this only occurs when you're using the "scrollbars as needed" scrollbar policy.
An even more interesting situation occurs if you resize the window to include (for example) only horizontal scrollbars and then packs the window repeatedly...
Code for a Java app which displays the strange behaviour is included below:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestJScrollPane {
static {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
catch (Exception e) { }
private JFrame mainWindow;
public TestJScrollPane() {
mainWindow = createMainWindow();
mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainWindow.pack();
mainWindow.show();
public JFrame createMainWindow() {
JFrame window = new JFrame("Test of scrollpane");
window.getContentPane().setLayout(new GridBagLayout());
final JPanel stuffPanel = new JPanel();
stuffPanel.setBorder(BorderFactory.createTitledBorder("Collection of stuff"));
stuffPanel.setLayout(new GridBagLayout());
JLabel stuffLabel = new JLabel("A label");
JTextField stuffField = new JTextField(10);
JButton stuffButton = new JButton("Pack the window");
JList listOfStuff = new JList();
listOfStuff.setListData(new String[] {"Fish", "Bird", "Mammal", "Insect", "Spider"});
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
stuffPanel.add(stuffLabel, gbc);
gbc.gridx = 1;
stuffPanel.add(stuffField, gbc);
gbc.gridy = 1;
gbc.gridx = 0;
gbc.gridwidth = 2;
stuffPanel.add(stuffButton, gbc);
gbc.gridy = 2;
gbc.fill = GridBagConstraints.BOTH;
stuffPanel.add(listOfStuff, gbc);
final JScrollPane scroller = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
scroller.setViewportView(stuffPanel);
gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.BOTH;
gbc.weightx = 1;
gbc.weighty = 1;
window.getContentPane().add(scroller, gbc);
stuffButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
mainWindow.pack();
System.out.println("Stuff panel size: " + stuffPanel.getSize());
System.out.println("Stuff panel preferred size:" + stuffPanel.getPreferredSize());
System.out.println("Scroller size: " + scroller.getSize());
System.out.println("Scroller preferred size: " + scroller.getPreferredSize());
return window;
public static void main(String[] args) {
new TestJScrollPane();
}Why would the JScrollPane be as big as the entire
frame when you added 800x600 panels on all sides of
it? It's going to be in the center surrounded by
huge panels. Thanks, kablair. However, if you look at the code, these panels are not 800x600 on all sides. The north and south panels only add a combined height of 100, and the east and west panels only add a combined width of 100. so the whole window, minus insets, should be 900x700.
Anyway, i took the advice of the guy above, and that has gotten me much closer. In the bigger app that I'm trying to calculate the size, now I'm only 2 pixels away from the true size, although I can't figure out what I'm forgetting. -
Design problem with JScrollPane
First, I have problems with english. I hope u understand without problems that Im trying to say here. Sorry about that.
Mi problem is whit a JScrollPane. I want to put an image whit a predefined size for draw inside it. I dont have any information about it, just the size. I want to put it in a JPane. The best choice is use the JPane area. The problem is that I want to use a JScrollPane because the image is bigger that the visualization area.
Im unable to put a Canvas in the ScrollPane, or a JPane whit a predefined size or an image whit a predefined size. Im sure that is a design problem. Somebody can tell me something I can start whit? What do u think is better choice to put inside a JScrollPane?
I dont send any source code because I dont have anything else that is show in the example.
Gracias.import java.awt.*;
import javax.swing.*;
import java.net.URL;
public class Test extends JFrame {
String url = "http://www.sandbox-usa.com/images/product_images/2piece_16.gif";
public Test() {
// System.getProperties().put( "proxySet", "true" ); // uncomment if you have proxy
// System.getProperties().put( "proxyHost", "myproxy.mydomain.com" ); // Your proxyname/IP
// System.getProperties().put( "proxyPort", "80"); // Sometimes 8080
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
try {
Image i = Toolkit.getDefaultToolkit().getImage(new URL(url));
JLabel jl = new JLabel(new ImageIcon(i));
content.add(new JScrollPane(jl), BorderLayout.CENTER);
setSize(200, 200);
setVisible(true);
} catch (Exception e) { e.printStackTrace(); }
public static void main(String[] args) { new Test(); }
} -
Problem with Jpanel repaintingl
Hi!
I have a problem with Jpanel.
First , I add a Jscrollpane to the panel and I don't
see it.
Second, I have a paint method in the Jpanel and I do there some painting but when I exe the application I can see the panel painting only when I put the mouse cursor
on the place where the panel need to be.
It is very strange.
Help me.
Yair.Example code??
Can't tell what's wrong otherwise.
First , I add a Jscrollpane to the panel and I don't
see it.Have you added anything to this JScrollPane? Unless you set the scroll bar policies to always on you won't see anything if you haven't added anything to the scrollpane.
Also, if you're only adding this scrollPane to your JPanel initilise it with
JPanel whippet = new JPanel(new BorderLayout())
.. then when you add your scrollPanel to your JPanel do this to make sure its added slap in the in middle of it:
whippet.add(yourScrollPanel, BorderLayout.CENTER);
Bit more info please - duuuuuuuuuuuuuuuude (man, "Finding Nemo" was well funny didn't you think.. anyways, that's besides the point.... could just be my 8 year old mental age though.. who knows.)? -
Problem with JTable and JPanel
Hi,
I'm having problems with a JTable in a JPanel. The code is basicly as follows:
public class mainFrame extends JFrame
public mainFrame()
//A menu is implemeted giving rise to the following actions:
public void actionPerformed(ActionEvent evt)
String arg = evt.getActionCommand();
if(arg.equals("Sit1"))
//cells, columnNames are initiated correctly
JTable table = new JTable(cells,columnNames);
JPanel holdingPanel = new JPanel();
holdingPanel.setLayout( new BorderLayout() );
JScrollPane scrollPane = new JScrollPane(holdingPanel);
holdingPanel.setBackground(Color.white);
holdingPanel.add(table,BorderLayout.CENTER);
add(scrollPane, "Center");
if(arg.equals("Sit2"))
if(scrollPane !=null)
remove(scrollPane);validate();System.out.println("ScrollPane");
if(holdingPanel !=null)
remove(holdingPanel);
if(table !=null)
remove(table);table.setVisible(false);System.out.println("table");
//Put other things on the holdingPanel....
private JScrollPane scrollPane;
private JPanel holdingPanel;
private JTable table;
}The problem is that the table isn't removed. When you choose another situation ( say Sit2), at first the table apparently is gone, but when you press with the mouse in the area it appeared earlier, it appears again. How do I succesfully remove the table from the panel? Removing the panel doesn't seem to be enough. Help is much appreciated...
Best regards
SchwartzIf you reuse the panel and scroll pane throughout the application,
instantiate them in the constructor, not in an often-called event
handler. In the event handler, you only do add/remove of the table
on to the panel. You can't remove the table from the container
which does not directly contain it.
if (arg.equals("Sit2")){
holdingPanel.remove(table);
holdingPanel.revalidate();
holdingPanel.repaint(); //sometimes necessary
} -
Problem with addRow and MultiLine Cell renderer
Hi ,
Ive a problem with no solution to me .......
Ive seen in the forum and Ivent found an answer.......
The problem is this:
Ive a JTable with a custom model and I use a custom multiline cell renderer.
(becuse in the real application "way" hasnt static lenght)
When I add the first row all seem to be ok.....
when I try to add more row I obtain :
java.lang.ArrayIndexOutOfBoundsException: 1
at javax.swing.SizeSequence.insertEntries(SizeSequence.java:332)
at javax.swing.JTable.tableRowsInserted(JTable.java:2926)
at javax.swing.JTable.tableChanged(JTable.java:2858)
at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableMo
del.java:280)
at javax.swing.table.AbstractTableModel.fireTableRowsInserted(AbstractTa
bleModel.java:215)
at TableDemo$MyTableModel.addRow(TableDemo.java:103)
at TableDemo$2.actionPerformed(TableDemo.java:256)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:17
64)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ctButton.java:1817)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:419)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:245)
at java.awt.Component.processMouseEvent(Component.java:5134)
at java.awt.Component.processEvent(Component.java:4931)
at java.awt.Container.processEvent(Container.java:1566)
at java.awt.Component.dispatchEventImpl(Component.java:3639)
at java.awt.Container.dispatchEventImpl(Container.java:1623)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
at java.awt.Container.dispatchEventImpl(Container.java:1609)
at java.awt.Window.dispatchEventImpl(Window.java:1590)
at java.awt.Component.dispatchEvent(Component.java:3480)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
This seems to be caused by
table.setRowHeight(row,(getPreferredSize().height+2)); (line 164 of my example code)
About the model I think its ok.....but who knows :-(......
Please HELP me in anyway!!!
Example code :
import javax.swing.*;
import javax.swing.table.*;
import java.text.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class TableDemo extends JFrame {
private boolean DEBUG = true;
MyTableModel myModel = new MyTableModel();
MyTable table = new MyTable(myModel);
int i=0;
public TableDemo() {
super("TableDemo");
JButton bottone = new JButton("Aggiungi 1 elemento");
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
//table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this window.
getContentPane().add(bottone,BorderLayout.NORTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);
bottone.addActionListener(Add_Action);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
class MyTable extends JTable {
MultiLineCellRenderer multiRenderer=new MultiLineCellRenderer();
MyTable(TableModel tm)
super(tm);
public TableCellRenderer getCellRenderer(int row,int col) {
if (col==1) return multiRenderer;
else return super.getCellRenderer(row,col);
class MyTableModel extends AbstractTableModel {
Vector data=new Vector();
final String[] columnNames = {"Name",
"Way",
"DeadLine (ms)"
public int getColumnCount() { return 3; }
public int getRowCount() { return data.size(); }
public Object getValueAt(int row, int col) {
Vector rowdata=(Vector)data.get(row);
return rowdata.get(col); }
public String getColumnName(int col) {
return columnNames[col];
public void setValueAt (Object value, int row,int col)
//setto i dati della modifica
Vector actrow=(Vector)data.get(row);
actrow.set(col,value);
this.fireTableCellUpdated(row,col);
public Class getColumnClass(int c)
return this.getValueAt(0,c).getClass();
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col == 1)
return false;
else
return true;
public void addRow (String name,ArrayList path,Double dead) {
Vector row =new Vector();
row.add(name);
row.add(path);
row.add(dead);
row.add(name); //!!!Mi tengo questo dato da utilizzare come key per andare a
//prendere il path nella lista dei paths di Project
//(needed as key to retrive data if name in col. 1 is changed)
data.add(row);
//Inspector.inspect(this);
System.out.println ("Before firing Adding row...."+this.getRowCount());
this.fireTableRowsInserted(this.getRowCount(),this.getRowCount());
public void delRow (String namekey)
for (int i=0;i<this.getRowCount();i++)
if (namekey.equals(this.getValueAt(i,3)))
data.remove(i);
this.fireTableRowsDeleted(i,i);
//per uscire dal ciclo
i=this.getRowCount();
public void delAllRows()
int i;
int bound =this.getRowCount();
for (i=0;i<bound;i++)
{data.remove(0);
System.out.println ("Deleting .."+data);
this.fireTableRowsDeleted(0,i);
class MultiLineCellRenderer extends JTextArea implements TableCellRenderer {
private Hashtable rowHeights=new Hashtable();
public MultiLineCellRenderer() {
setEditable(false);
setLineWrap(true);
setWrapStyleWord(true);
//this.setBorder(new Border(
public Component getTableCellRendererComponent(JTable table,Object value, boolean isSelected, boolean hasFocus, int row, int column) {
//System.out.println ("Renderer called"+value.getClass());
if (value instanceof ArrayList) {
String way=new String (value.toString());
setText(way);
TableColumn thiscol=table.getColumn("Way");
//System.out.println ("thiscol :"+thiscol.getPreferredWidth());
//setto il size della JTextarea sulle dimensioni della colonna
//per quanto riguarda il widht e su quelle ottenute da screen per l'height
this.setSize(thiscol.getPreferredWidth(),this.getPreferredSize().height);
// set the table's row height, if necessary
//System.out.println ("Valore getPreferred.height"+getPreferredSize().height);
if (table.getRowHeight(row)!=(this.getPreferredSize().height+2))
{System.out.println ("Setting Row :"+row);
System.out.println ("Dimension"+(getPreferredSize().height+2));
System.out.println ("There are "+table.getRowCount()+"rows in the table ");
if (row<table.getRowCount())
table.setRowHeight(row,(getPreferredSize().height+2));
else
setText("");
return this;
/**Custom JTextField Subclass che permette all'utente di immettere solo numeri
class WholeNumberField extends JTextField {
private Toolkit toolkit;
private NumberFormat integerFormatter;
public WholeNumberField(int value, int columns) {
super(columns);
toolkit = Toolkit.getDefaultToolkit();
integerFormatter = NumberFormat.getNumberInstance(Locale.US);
integerFormatter.setParseIntegerOnly(true);
setValue(value);
public int getValue() {
int retVal = 0;
try {
retVal = integerFormatter.parse(getText()).intValue();
} catch (ParseException e) {
// This should never happen because insertString allows
// only properly formatted data to get in the field.
toolkit.beep();
return retVal;
public void setValue(int value) {
setText(integerFormatter.format(value));
protected Document createDefaultModel() {
return new WholeNumberDocument();
protected class WholeNumberDocument extends PlainDocument {
public void insertString(int offs,
String str,
AttributeSet a)
throws BadLocationException {
char[] source = str.toCharArray();
char[] result = new char[source.length];
int j = 0;
for (int i = 0; i < result.length; i++) {
if (Character.isDigit(source))
result[j++] = source[i];
else {
toolkit.beep();
System.err.println("insertString: " + source[i]);
super.insertString(offs, new String(result, 0, j), a);
ActionListener Add_Action = new ActionListener() {
public void actionPerformed (ActionEvent e)
System.out.println ("Adding");
ArrayList way =new ArrayList();
way.add(new String("Uno"));
way.add(new String("Due"));
way.add(new String("Tre"));
way.add(new String("Quattro"));
myModel.addRow(new String("Nome"+i++),way,new Double(0));
public static void main(String[] args) {
TableDemo frame = new TableDemo();
frame.pack();
frame.setVisible(true);In the addRow method, change the line
this.fireTableRowsInserted(this.getRowCount(),this.getRowCount()); to
this.fireTableRowsInserted(data.size() - 1, data.size() - 1);Sai Pullabhotla
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