JScrollPane / JTextArea Does Not Appear
May 29, 2014
I have a JFrame that houses a JScrollPane that houses a JTextArea (I set the console to output to the JTextArea). For some reason, when the frame appears, text is being printed like usual, but the scroll pane isn't rendered unless I hover over it or click on it. Also when I resize the frame, nothing appears unless I hover over it or click on it.
Code:
package voxel;
import java.awt.Dimension;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.util.logging.Logger;
[Code] ....
I've tried repainting the frame when everything is added to the frame and packed, but it doesn't change anything. I tried searching for other people who had the same problem, but most of them were relating to setting the layout to null (which I don't do) and using JPanels.
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Feb 7, 2014
I have a swing application that gets football scores from a website using Jsoup.
When the "Get Scores" button is pressed, the scores are printed to a JTextArea with a JScrollPane.
I have also used a SwingWorker to update the scores every couple of seconds.
My problem is that every time the JTextArea updates, the JScrollPane scrolls back to the top of the text area. I wan the scroll bar to stay where the user left it.
Here is my code (The update is currently set to update every 1 second so you can see what the scroll bar is like).
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
public class frame extends JFrame {
[Code] ....
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Jan 16, 2015
As you can see in the above image. I have create One jFrame inside it their is one jPanel. Inside jPanel their are dynamic buttons whose range can change. (its like text box if you add more text scroll bar will appear)
I want to add jScrollBarr/jScollPane to jPanel so that when more than 6buttons will be their, I can scroll it down/up. So my question is how should I place jScollPane using this DRAG-DROP tool. When i clicked on jScrollPane and tried to put it inside jPanel I am unable to set it's position. It's my first time to add jScrollPane for jPanel inside jFrame.
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Aug 19, 2014
My program's tree:
JFrame{
JPanel(That MenuBar at the top)
JPanel(That panel at center with table){
JScrollPane{
JTable
}
}
}
I want to add my custom image to that grey space right there. I guess it is a JScrollPane, because I added that orange background on JPanel that contains it. But when I add this code to my custom class of JScrollPane:
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
if(background == null){
background = new ImageIcon(ClassLoader.getSystemResource("tableBg.png")).getImage();
}
g.drawImage(background, 0, 0, null);
}
The result is the same, no changes.
Then I read some documentation. I found this method:
scrollPane.getViewport().setBackground(Color c);
It works, but it accepts only color and I want to add image. Is there any way to do that? Do I need to subclass JViewport and use paintComponent ? If yes, then how to make getViewport() method return my custom subclassed version?
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Mar 12, 2014
I have a JScrollPane and JTable inside. In the right column of the table at the end (south) I made a ChartPanel in one of the classes where I make the design for the Frame:
Java Code:
ChartPanel chartpanel = new ChartPanel(pieChart);
pCapturing.add(chartpanel, BorderLayout.NORTH); mh_sh_highlight_all('java');
And when I click on any row above, from the list in the column, I would like an appropriate pie chart to be drawn.
I need here (in another class where I define the getTableCellRendererComponent) to enter a code to display the chart in the last row of the panel:
Java Code:
PieChart3 pie=sectionsChartProvider.getSectionPieChart(section);
...
...
if((hasFocus) || (isSelected)) {
if(column == 0)
setBorder( new MatteBorder(1, 1, 1, 0, colorBorder) );
[Code] .....
But, I don't know how to do this. I also have a class for drawing the pie chart.
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Mar 1, 2014
I am trying to create a JScrollPane with buttons in it, but I noticed that when I try to scroll, the items all move into ONE row at the top of the JScrollPane. How do I have them vertical? Is there something wrong with the way I am setting up the JScrollPane?
private static void addScrollPane() {
jScrollPane = new JScrollPane(new JPanel());
((JPanel)jScrollPane.getViewport().getView()).add(new JButton("First Button"));
[Code]....
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Apr 21, 2015
I got an application with JScrollPanes; they seem to work fine, but fresh after the start, their scrollbars seem dead:I only begin to see their components after resizing the application window with the mouse.Clicking the scroll bars or their buttons (in Metal Look&Feel) does nothing.And there is no 'knob' visible.Dragging the side or bottom of the application window suddenly shows all and makes them operational.My ComponentListener on the window that contains the scrollpanes only does a repaint on the components inside the scrollpanes.Adding such to the code has no effect, neither does a repaint on the scrollpanes themselves.
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Mar 3, 2006
I have a JScrollPane with a JTextArea. The JTextArea is loaded with 10 lines of data. I have two JCheckBox's. The first check box sets the scroll to 10. sp.getVerticalScrollBar().setValue(10); The second check box reloads (ta.setText(text)) the text and then sets the scroll to 10. Why does the second one not work? I have attached a simple program. It is probably easier for you to compile and run than for me to go into detail explaining further.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Tester extends JFrame {
private static final String text = "1
[Code] ......
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Mar 3, 2014
When I add to a JScrollPane (I'm adding to a JPanel then putting that in the scroll pane) it displays as many items in one row as possible. How can I make it so that it only displays one per row?
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May 24, 2014
I have Implemented a user control / component that allows zooming in and out of a displayed BufferedImage, for discussion's sake, 3rd party libraries are excluded and everything must be from scratch.I have an image rendered on a JPanel, the JPanel is contained within a scrollbar.
Zooming inout etc works perfectly.The Scrollbars are rendered correctly on Zoom In and disappear when I zoom out.I want to add the functionality of focusing on a specific quarter of the displayed image via four dedicated buttons, each send an int (1-4) to a method, that controls the scrollbars.
public void zoomToQuarter(int i)
{
double width = (currentBufferedImage.getWidth()*2.2)+1;
double height = (currentBufferedImage.getHeight()*2.2)+1;
JScrollBar vertical = scrollPane.getVerticalScrollBar();
JScrollBar horizontal = scrollPane.getHorizontalScrollBar();
horizontal.setMaximum((int)width);
vertical.setMaximum((int)height);
[code]....
And resizes the image whilst scrolling the scrollbars accordingly,The method works as expected, and the scrollbars go to the desired location, But there's a catch:The first click on any of the above buttons does not work, but from the second click and on, everything works great!
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Jun 3, 2014
When a JTextArea is created in a JScrollPane and the contents of the JTextArea change, the JScrollPane's preferred size doesn't change.
In the following code, I create a JScrollPane and a JTextArea as a client. I then, add contents to the JTextArea and call revalidate() on it to let the JScrollPane re-update itself. However, it keeps reporting the same preferred size.
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
class c
{
static JScrollPane sp;
static JTextArea ta;
public static void main (String...args)
[Code] ....
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Dec 9, 2014
I'm writing a Java Swing program for my software development class to allow a user to create a map for a side scroller video game. I'm stuck on a particular part of my GUI where I'm trying to create a properties box for specific tiles. When I draw the components onto the JPanel and display it as it is, it shows two check boxes per row. On the ScrollPane however, all the check boxes go straight onto one line and draw out the scroll pane. Right now I am only concerned with just making the basic GUI.
Here is what I have so far:
Within the main class, I am creating the JFrame and adding components to it. I am attempting to create a JScrollPane which will hold the properties check boxes...
Here is the method where I am implementing the code. It works, but it doesn't display correctly.
private void createPropertiesBox() {
PropertiesBoxPanel pbp = new PropertiesBoxPanel();
propertiesBox = new JScrollPane(pbp);
propertiesBox.setViewportView(pbp);
frame.add(propertiesBox);
[Code] .....
I've been tinkering with this code for quite some time now and I cannot seem to make a breakthrough on how to fix this.
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Apr 27, 2014
I've built up an unreasonably large and unreasonably complicated JPanel. Unfortunately, when I use setViewportView to add it to a JScrollPane, a get an extended UI freeze—that operation takes several seconds. I'm trying to figure out what's taking so long. I've tried some fairly extreme things, like overriding the paintComponent, PaintComponents, paintChildren, paint, repaint, validate, revalidate, and validateTree methods in the panel with no-ops to try to figure out what's taking so long, but to no avail. I've tried validating the JPanel before adding it, but that has no effect. If I override the addImpl method of the scroll pane, that makes things quick, but it doesn't really narrow things down much.
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Feb 21, 2015
Returning true from getScrollableTracksViewportWidth() makes the table (or other Scrollable) size its width to match the viewport. I need the opposite: for the viewport to expand its width to accommodate the table (of course, limited by the constraints imposed by the scroll pane's container's layout manager) without reducing column widths i.e. setAutoResizeMode(AUTO_RESIZE_OFF).
I have achieved this by overriding
getPreferredScrollableViewportSize(): JTable table = new JTable() {
@Override
public Dimension getPreferredScrollableViewportSize() {
return new Dimension(super.getPreferredSize().width,
super.getPreferredScrollableViewportSize().height);
}
};
Now when the scroll pane is added at BorderLayout.CENTER and the frame is pack()ed, all columns of the table are displayed, without need for a horizontal scrollbar.
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Feb 7, 2014
I am trying to place a number of JLabel and JTextField objects inside a JPanel which has a JScrollPane.
One thing is, that at one time, I have have a certain number of JLabel and JTextField objects which number would cover an area greater than the JPanel's vertical size.
How when I implement the JScrollPane and I run the program, the scroll bars appear, but they don't scroll the pane inside the JPanel, the items are fixed.
Could the problem be because I am using a Null Layout.
Will I have to use one of the standard layouts available, like GridLayout for the JScrollPane scrolling function to work?
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Feb 5, 2015
I have a problem with the size of my scrollPane. It won't fill the space in the JPanel.
is there a way to let the scrollPane fill the whole space?
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Apr 15, 2009
I have a JTable that is within a JScrollPane. If I try to write add a MouseListener to the JTable it never fires. However, a mouse event does fire for the JScrollPane which it is added to. Is there a way to prevent the JScrollPane from capturing the event or passing it along to the JTable?
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Nov 16, 2014
So for a test i have a small array set as a jlist which is the contents of my jscrollpane, and it appears as if nothing is there until i adjust the window size by dragging it out or in... whats going on?
Here is the full code
import java.awt.BorderLayout;
import java.awt.ComponentOrientation;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
[Code] ...
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Feb 13, 2015
In my code where the Button Action Performed is created, I have done the following to ensure that the visibility of the JTable and JScrollPane have been set to true. But it does not work?
Code below:
private void RunQueryButtonActionPerformed(java.awt.event.ActionEvent evt) {
jScrollPane2.setVisible(true);
table_001.setVisible(true);
try {
PreparedStatement st =conn.prepareStatement(SQLTextEditor.getText());
ResultSet rs = st.executeQuery();
table_001.setModel(DbUtils.resultSetToTableModel(rs));
table_001.setAutoResizeMode(table_001.AUTO_RESIZE_OFF);
[code]....
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Sep 21, 2014
So I have been working on this code for a bit now... basically just supposed to be a display for a calculator, next week in my class we are learning about how to make it do stuff. so it's supposed to just look right for now. Should look something like this actually
My first question is this, how can I get the JTextArea to display over the top like the example?
My second question is I just started getting an error that compiled before, and I haven't changed anything about this line. Here is everything.
import java.awt.*;
import java.awt.font.*;
import javax.swing.*;
@SuppressWarnings("serial")
public class CalcDisplay extends JFrame{
String[] buttonText = {
[Code]...
the output looked something like this though note this is an old screengrab from while I was working on it. I have since gotten it to color correctly and I have a jtextarea below the numbers. though I need to get it to implement above the numbers and can't figure out how to do so the other example is what it should look like, disregard the color choice.The error I was getting appeared on line 36
Exception in thread "main" java.lang.Error: Unresolved compilation problems: The method setLayout(LayoutManager) in the type Container is not applicable for the arguments (GridLayout) The constructor GridLayout(int, int, int, int) is undefined
at CalcDisplay.addComponentsToPane(CalcDisplay.java:36)
at CalcDisplay.main(CalcDisplay.java:82)
This code has worked through the whole project and I haven't changed a thing.
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Apr 21, 2014
I created this JTextArea with some text in it. And it also has few variables.
Sth like that:
Java Code:
protected JTextArea textLog;
textLog = new JTextArea();
textLog.append("test: "+variable); mh_sh_highlight_all('java');
And now while I use button that changes variable value, in textLog variable still shows old value.
Tried to use remove(textLog); textLog.validate(); etc(remove, validate, revalidate, add, repaint), because it works fine with JButtons, but still, in textLog variable gives me old value.
like "you should use somethingvalidate(); while clickin button and it will works", not some shit for 3032 lines with 99% of code that I don't need to do what I want.
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Jun 17, 2014
I have a JTextArea that the user car resize. Now, I want to check if the JTextArea is displaying all the text in order to change the border color. The JTextArea line wrap is set to true. how to do this?
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Apr 24, 2014
Every time I load a txt file into a JTextArea it prints the results to the JFrame incorrectly I notice its mainly the white spaces this is happening to. I have tried a few ways to remedy this problem but it still keeps occurring? I've tried append() read() also setText() even Scanner. I have enclosed a picture of my GUI and my txt file I am using.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
import javax.swing.JFrame;
import javax.swing.JTextArea;
[Code] ....
Attached image(s)
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May 3, 2015
i have this code when i selected a node it display the attribut and value of it in JTextArea but i want it into table :
public void valueChanged( TreeSelectionEvent event )
{
if( event.getSource() == jtree ){
{
FramePrincipale.getExplorePanelll().setText(null);
TreePath path = jtree.getSelectionPath();
String a = changeString(path);
Hashtable env1 = System.getProperties();
env1.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
env1.put(Context.PROVIDER_URL, "ldap://localhost:11389/");
[code]....
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Feb 23, 2015
making an app in java.i m making app that should insert smilyes in textarea while sending a message.
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Apr 20, 2014
I have dragged and dropped a jTextArea from netbeans palette onto my form. But when I right clicked for Event > action > actionPerformed for implementation, I realized such was not there, unlike the jTextField component. For example, I have tried this but it didn't work:
//{
Import java.swing.*;
JTextArea txa = new JTextArea();
txa.getText(jTextArea1);
txa.setText(jTextArea1);
txa.setTextWrap(true);
//}
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