Scrollbar postion in the middle of scrolling context
I'm working on a project where i give the user the ability to zoom an image,
the problem is when the user zoom the image, the right and left scrollbars are positioned at the beggining of the FigureCanevas.
What i want is when redrawing the image, the scrollbars should be in the middle of their scrolling context, what will give him a look on the center of the image after redrawing.
Any idea.
regards.
Edited by: Otmane on May 23, 2012 3:57 PM
Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Restore from backup. See:
iOS: Back up and restore your iOS device with iCloud or iTunes
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar
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How to get only the middle panel to resize and show a scrollbar ?
I have a window(frame) that has three panels - top, middle and bottom. When the window is shrunk vertically, I need a scrollbar to show up for the middle panel only. So the maximum vertical shrink possible would be the sum of the top and bottom panels plus some small amount (to see the middle panel scroll bar). So the top and bottom panels would always show completely (height wise). Please review my code and suggest corrections. I've tried couple of different ways but without success....The code below is my most recent attempt.
Thanks.....
import java.awt.*;
import java.awt.Color.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
public class PanelResizingA extends JPanel implements MouseListener, MouseMotionListener
* @param args
public static void main(String[] args)
JFrame frame = new JFrame ("All Panels");
PanelResizingA allThreePanels = new PanelResizingA();
JScrollPane allHorizontalScroll = new JScrollPane();
//frame.add(allHorizontalScroll);
allHorizontalScroll.setViewportView(allThreePanels);
allHorizontalScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
allHorizontalScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
frame.getContentPane().add(allHorizontalScroll);
frame.setVisible(true);
frame.pack();
private JPanel topPanel;
private JPanel midPanel;
private JPanel bottomPanel;
private JPanel allPanels;
private JScrollPane midVerticalScroll;
private JScrollPane allHorizontalScroll;
private JLabel posnCheckLabel;
private int panelWidth = 0;
private int topPanelHt = 0;
private int midPanelHt = 0;
private int bottomPanelHt = 0;
private int allPanelsHt = 0;
private Point pointPressed;
private Point pointReleased;
public PanelResizingA()
createAllPanels();
private void createAllPanels()
topPanel = new JPanel();
midPanel = new JPanel();
bottomPanel = new JPanel();
allPanels = new JPanel();
posnCheckLabel = new JLabel("Label in Center");
panelWidth = 300;
topPanelHt = 150;
midPanelHt = 200;
bottomPanelHt = 150;
allPanelsHt = topPanelHt + midPanelHt + bottomPanelHt;
//topPanel.setMinimumSize(new Dimension(panelWidth-150, topPanelHt));
//topPanel.setMaximumSize(new Dimension(panelWidth, topPanelHt));
topPanel.setPreferredSize(new Dimension(panelWidth, topPanelHt));
topPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
midPanel.setMinimumSize(new Dimension(panelWidth-150, midPanelHt-150));
midPanel.setMaximumSize(new Dimension(panelWidth, midPanelHt));
midPanel.setPreferredSize(new Dimension(panelWidth, midPanelHt-3));
midPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
midPanel.setLayout(new BorderLayout());
midPanel.add(posnCheckLabel, BorderLayout.CENTER);
//midPanel.add(new PanelVerticalDragger(midPanel), BorderLayout.SOUTH);
//bottomPanel.setMinimumSize(new Dimension(panelWidth-150, bottomPanelHt));
//bottomPanel.setMaximumSize(new Dimension(panelWidth, bottomPanelHt));
bottomPanel.setPreferredSize(new Dimension(panelWidth, bottomPanelHt));
bottomPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
allPanels.setMinimumSize(new Dimension (panelWidth-150, allPanelsHt-300));
allPanels.setMaximumSize(new Dimension(panelWidth+25, allPanelsHt+25));
allPanels.setPreferredSize(new Dimension(panelWidth, allPanelsHt));
midVerticalScroll = new JScrollPane();
//midPanel.add(midVerticalScroll);
midVerticalScroll.setViewportView(midPanel);
midVerticalScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
midVerticalScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
allPanels.setLayout(new BoxLayout(allPanels,BoxLayout.Y_AXIS));
allPanels.add(topPanel);
allPanels.add(midPanel);
allPanels.add(bottomPanel);
this.add(allPanels);
addMouseListener(this);
addMouseMotionListener(this);
private void updateCursor(boolean on)
if (on)
setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
else
setCursor(null);
@Override
public void mousePressed(MouseEvent e)
pointPressed = e.getLocationOnScreen();
updateCursor(true);
@Override
public void mouseDragged(MouseEvent e)
mouseReleased(e);
pointPressed = e.getLocationOnScreen();
@Override
public void mouseReleased(MouseEvent e)
pointReleased = e.getLocationOnScreen();
Dimension allPanelsPrefSize = this.allPanels.getPreferredSize();
Dimension midPanelPrefSize = this.midPanel.getPreferredSize();
Dimension allPanelsSize = this.allPanels.getSize();
Dimension allPanelsMinSize = this.allPanels.getMinimumSize();
int midPanelPrefHt = midPanelPrefSize.height;
int midPanelPrefWidth = midPanelPrefSize.width;
int maxHtDelta = allPanelsPrefSize.height - allPanelsMinSize.height;
//int deltaY = pointPressed.y - pointReleased.y;
Point panelLocation = this.getLocation();
Dimension size = this.getSize();
if (size.height < allPanelsSize.height)
int deltaY = pointPressed.y - pointReleased.y;
if (deltaY < maxHtDelta)
midPanelPrefHt = midPanelPrefHt-deltaY;
else {midPanelPrefHt = this.midPanel.getMinimumSize().height;}
this.midPanel.setPreferredSize(new Dimension(midPanelPrefWidth, midPanelPrefHt));
this.midVerticalScroll.setViewportView(this.midPanel);
allPanels.setLayout(new BoxLayout(allPanels,BoxLayout.Y_AXIS));
allPanels.add(topPanel);
allPanels.add(midVerticalScroll);
allPanels.add(bottomPanel);
midVerticalScroll.revalidate();
pointPressed = null;
pointReleased = null;
@Override
public void mouseEntered(MouseEvent e)
updateCursor(true);
@Override
public void mouseExited(MouseEvent e)
@Override
public void mouseClicked(MouseEvent e)
@Override
public void mouseMoved(MouseEvent e)
}Edited by: 799076 on Oct 8, 2010 12:53 PM
Edited by: 799076 on Oct 8, 2010 12:55 PMRob,
1. Sample code
ScrollablePanel panel = new JScrollablePanel(...);
panel.setScrollableWidth( ScrollablePanel.ScrollableSizeHint.FIT );references a JScrollablePanel - i'm assuming this is a typo and should read new ScrollablePanel()?
Anyway I've tried this but it still does not show a vertical scroll bar for the middle panel:
package JavaTutes;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Color;
import javax.swing.*;
import javax.swing.Scrollable;
public class PanelResizingB extends JPanel
private static final Dimension PANEL_SIZE = new Dimension(500, 250);
private String[] labelStrings = {"Top Panel", "Middle Panel", "Bottom Panel"};
private JScrollPane midVertScroll;
private JScrollPane allHorzScroll;
public PanelResizingB()
setLayout(new BorderLayout());
//JPanel allPanels = new JPanel();
ScrollablePanel midPanel = new ScrollablePanel();
midPanel.setScrollableHeight(ScrollablePanel.ScrollableSizeHint.FIT);
//midPanel.setScrollableWidth(ScrollablePanel.ScrollableSizeHint.FIT);
midPanel.add(new JLabel("Middle Panel"));
midPanel.setPreferredSize(PANEL_SIZE);
midPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
JPanel[] panels = new JPanel[labelStrings.length];
for (int i = 0; i < panels.length; i++)
panels[i] = new JPanel(new BorderLayout());
panels.add(new JLabel(labelStrings[i]));
panels[i].setPreferredSize(PANEL_SIZE);
panels[i].setBorder(BorderFactory.createLineBorder(Color.BLACK));
setLayout(new BorderLayout());
add(panels[0], BorderLayout.NORTH);
add(new JScrollPane(midPanel), BorderLayout.CENTER);
add(panels[2], BorderLayout.SOUTH);
add(new JScrollPane(allPanels));
private static void createAndShowUI()
JFrame frame = new JFrame("PanelResizingB");
PanelResizingB allThreePanels = new PanelResizingB();
JScrollPane allHorizontalScroll = new JScrollPane();
allHorizontalScroll.setViewportView(allThreePanels);
//allHorizontalScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
//allHorizontalScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
frame.getContentPane().add(allHorizontalScroll);
//frame.getContentPane().add(new PanelResizingB());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
public static void main(String[] args)
java.awt.EventQueue.invokeLater(new Runnable()
public void run()
createAndShowUI();
I'm sure it is something simple - but I'm just not getting it. -
Scrollbars in the middle of panel
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Thanks,
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Attachments:
VI_Scrollbar_Problem.JPG 69 KBEdit the Background in the sense...
Shift + Right Click will give that pallet
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<<Kudos are welcome>>
ELECTRO SAM
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.
- John 3:16 -
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<code>function lockCol(tblID) {
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strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
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Setting the scrollbar to be by default in the middle of the scrollpane
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This is a runnable stand-alone app.
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Component;
import java.awt.Color;
import java.awt.Font;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;
public class MarketBook extends JFrame implements WindowListener,
ActionListener{
protected final int ROW_HEIGHT = 15;
protected final int NUM_ROW = 14;
protected final int PREF_WIDTH = 200;
protected final int PREF_HEIGHT = 150;
protected final int BID_COL = 1;
protected final int OFFER_COL = 2;
private String instrument;
private String mkbkID;
private String[] instArray = {"Item1", "Item2", "Item3"};
private String[] colNames = {"Qty", "Bid", "Offer", "Qty"};
private Vector<String> instrumentsList = new Vector<String>();
private DefaultTableModel dm = new DefaultTableModel(colNames, NUM_ROW);
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JPanel contentPane = new JPanel();
JPanel topPanel = new JPanel();
JComboBox instList = new JComboBox(instArray);
JTable bidOffer = new JTable(){
public boolean isCellEditable(int row, int column){
return false;
JScrollPane bidOfferScroll = new JScrollPane(bidOffer);
public MarketBook(String _mkbkID, Vector<String> _instList){
super(_instList.firstElement());
this.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
this.mkbkID = _mkbkID;
this.instrumentsList = _instList;
this.instrument = instrumentsList.firstElement();
buildGUI();
private void buildGUI(){
TableColumn tc = null;
contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
bidOfferScroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
bidOfferScroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
bidOfferScroll.setPreferredSize(new Dimension(PREF_WIDTH,PREF_HEIGHT));
System.err.println("Max: " + bidOfferScroll.getVerticalScrollBar().getMaximum());
System.err.println("Min: " + bidOfferScroll.getVerticalScrollBar().getMinimum());
System.err.println("Extent: " + bidOfferScroll.getVerticalScrollBar().getVisibleAmount());
System.err.println("Value: " + bidOfferScroll.getVerticalScrollBar().getValue());
bidOfferScroll.getVerticalScrollBar().setValueIsAdjusting(true);
bidOfferScroll.getVerticalScrollBar().setValue(50);
System.err.println("Value: " + bidOfferScroll.getVerticalScrollBar().getValue());
System.err.println("Model: " + bidOfferScroll.getVerticalScrollBar().getModel());
bidOfferScroll.getVerticalScrollBar().getMaximum()-
bidOfferScroll.getVerticalScrollBar().getMinimum())/2);*/
topPanel.setLayout(new FlowLayout(FlowLayout.LEFT));
topPanel.add(instList);
instList.addActionListener(this);
bidOffer.getTableHeader().setFont(new Font(null, Font.BOLD, 12));
bidOffer.setAlignmentX(JTable.CENTER_ALIGNMENT);
bidOffer.setModel(dm);
bidOffer.getColumnModel().getColumn(0).setPreferredWidth(40);
bidOffer.getColumnModel().getColumn(1).setPreferredWidth(60);
bidOffer.getColumnModel().getColumn(2).setPreferredWidth(60);
bidOffer.getColumnModel().getColumn(3).setPreferredWidth(40);
bidOffer.setRowHeight(ROW_HEIGHT);
// Set table renderer
for(int i = 0; i < bidOffer.getColumnCount(); i++){
tc = bidOffer.getColumnModel().getColumn(i);
tc.setCellRenderer(new CustomTableCellRenderer());
contentPane.add(topPanel);
contentPane.add(bidOfferScroll);
JFrame.setDefaultLookAndFeelDecorated(true);
this.setContentPane(contentPane);
this.pack();
this.setVisible(true);
public void actionPerformed (ActionEvent e){
JComboBox cb = (JComboBox)e.getSource();
String selectedItem = (String)cb.getSelectedItem();
updateSelectedInst(selectedItem);
public void windowActivated(WindowEvent arg0) {
// TODO Auto-generated method stub
public void windowClosed(WindowEvent arg0) {
// TODO Auto-generated method stub
public void windowClosing(WindowEvent arg0) {
// TODO Auto-generated method stub
this.setVisible(false);
this.dispose();
System.exit(0);
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
// Perform all updates necessary when new instrument is selected
private void updateSelectedInst(String inst){
this.setTitle(inst);
class CustomTableCellRenderer extends DefaultTableCellRenderer{
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column){
Component cell = super.getTableCellRendererComponent(table,
value, isSelected, hasFocus, row, column);
if (column == BID_COL){
cell.setBackground(Color.red);
else if (column == OFFER_COL){
cell.setBackground(Color.blue);
//cell.setFont(f)
return cell;
public static void main(String args[]){
Vector<String> tempVector = new Vector<String>();
tempVector.add("item1");
tempVector.add("item2");
MarketBook marketBook1 = new MarketBook("mkbk1", tempVector);
} -
Hi
I have a windows 7 and whenever I play anything on Windows Media Player Classic, the middle mouse button does not work as a vertical scroll in firefox, but instead shows a horizontal scroll that does not scroll the web pages. How can I fix this problem?
I hope that was clear.
ThnxHello kmanthie,
I just sent you a private message. If you are not sure how to check your forum messages, this post has instructions.
I worked on behalf of HP. -
What do you call it when there is a scroll bar in the middle of your page?
Hi,
I have a few pages that have four paragrapghs of text. I
don't want the over all dimensions of my page to change so I want
to have a window within my page that will have a scroll bar
allowing the visitor to scroll throught the text without having to
scroll down the whole page.
Can I do this through css?
Know what I mean?
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> Hi,
> I have a few pages that have four paragrapghs of text. I
don't want the
> over
> all dimensions of my page to change so I want to have a
window within my
> page
> that will have a scroll bar allowing the visitor to
scroll throught the
> text
> without having to scroll down the whole page.
> Can I do this through css?
> Know what I mean?
>
> Thanks,
> -
Using the middle mouse button to open a link in a new background tab also reloads the current page.
When I click on a link with the middle button to open the link in a new background tab, the original page reloads and my view jumps to the top each time.
The new tab loads fine but in order to continue reading the original page I have to scroll down to where the link I clicked on is.
If I right-click on the link and select "Open Link in New Tab" from the context menu then the behaviour is as expected -- does not reload the original page. The flaw only happens when using the convenient mouse shortcut.
This is annoying, for example, on long Wikipedia articles where I want to open some of the cited pages in other tabs for reading later whilst I continue to read original article. I'm constantly having to find where I was in order to continue reading.
I've observed this behaviour on both Windows XP and Ubuntu on various computers.
[EDIT]: Better description of problem in title.I've never had that happen with Firefox 4 on WinXP. I haven't updated my Netbook that runs Ubuntu to Firefox 4 yet.
1. Try disabling the Java Console 6.0.24 and the Java Quick Starter 1.0 extensions and see if that solves your middle-click problem.
2. Try the Firefox SafeMode. <br />
''A troubleshooting mode, which disables most Add-ons.''
''(If you're not using it, switch to the Default Theme.)''
# You can open the Firefox 4.0 SafeMode by holding the '''Shft''' key when you use the Firefox desktop or Start menu shortcut.
# Or use the Help menu item, click on '''Restart with Add-ons Disabled...''' while Firefox is running. <br />
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one. <br />
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes -
How to align flash content to the middle of the screen in browser?
I am currently building a website in flash cs5.5 using AS2.0. One of the pages is 1024px wide by 1536 height. I want the screen to show only the first half of the screen and then the user has to scroll down using the browser scrollbar to see the second half of the screen.
Below is the html code. I have changed the 'overflow' from hidden to auto so that the website is scrollable. However when i preview the website in the browser, it is aligned to the left. Even though below (highlighted in red) it says 'middle'. This is not what i want, i want the website to me aligned in the middle so that there is a border on either side of the website.I have tried numerous things to fix it but all to no avail. Could someone please help. Let me know if you need anymore info.
Thanks
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>aboutus</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css" media="screen">
html, body { height:100%; background-color: #333333;}
body { margin:0; padding:0; overflow:auto; }
#flashContent { width:100%; height:100%; }
</style>
</head>
<body>
<div id="flashContent">
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="1024" height="1536" id="aboutus" align="middle">
<param name="movie" value="aboutus.swf" />
<param name="quality" value="best" />
<param name="bgcolor" value="#333333" />
<param name="play" value="true" />
<param name="loop" value="true" />
<param name="wmode" value="window" />
<param name="scale" value="showall" />
<param name="menu" value="true" />
<param name="devicefont" value="false" />
<param name="salign" value="" />
<param name="allowScriptAccess" value="sameDomain" />
<!--[if !IE]>-->
<object type="application/x-shockwave-flash" data="aboutus.swf" width="1024" height="1536">
<param name="movie" value="aboutus.swf" />
<param name="quality" value="best" />
<param name="bgcolor" value="#333333" />
<param name="play" value="true" />
<param name="loop" value="true" />
<param name="wmode" value="window" />
<param name="scale" value="showall" />
<param name="menu" value="true" />
<param name="devicefont" value="false" />
<param name="salign" value="" />
<param name="allowScriptAccess" value="sameDomain" />
<!--<![endif]-->
<a href="http://www.adobe.com/go/getflash">
<img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" />
</a>
<!--[if !IE]>-->
</object>
<!--<![endif]-->
</object>
</div>
</body>
</html>#flashContent {
width: 1024px;
margin-left: auto;
margin-right: auto;
Get rid of the 100% w/h and give flashContent a set width (1024).
Then you can give the right and left an auto margin... centering the <div id="flashContent">.
Best wishes,
Adninjastrator -
How do I change what the middle mouse button/wheel does?
I feel like an idiot asking this, but I can't figure this out...
I've plugged in a bog standard 2 button + scroll wheel third button mouse, but I can't get the middle mouse button/wheel to behave like it would in Windows. If I click it, it changes programs, hold it it brings up the task switcher thing. It's like I'm pressing command + tab.
I want it to work normally, where the program I'm using the middle button responds, not the OS. Like in Firefox, I want to be able to close tabs with the middle mouse button, and open new links with it...instead all it can do is switch programs.
Is there a way to do this? Am I missing something obvious?Err...I don't know what happened, but I rebooted and now it's working like normal (knock on wood!). Noooo idea how it ended up in that state!
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