Swing/AWT/SWT :: Sizing JScrollPane Width To Its Contained JTable
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.
I have a ComboBox -- just a simple ComboBox with string items.
My string items aren't very long (5 letters max), but the ComboBox shows quite wide relative to my strings. So I would like to size my ComboBox to the size of my strings.
I messed around with setting the CellFactory of the ComboBox, and have the Cells produced by the CellFactory set the preferred width of the cells to some constant like 100. That worked in terms of changing the size of the ComboBox to the preferred width of 100.
But what I really want to do is to compute the preferred width from the string items. For that I need to be able to compute how wide a string item will be when rendered. And I guess that depends on the font size used by the ComboBox to render strings, which probably depends on the platform (OS X different to Windows?).
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?
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?
JScrollPane scrollPane = new JScrollPane(); contentPanel.add(scrollPane, BorderLayout.CENTER); tbl = new JXTable(); tbl.setColumnSelectionAllowed(true); tbl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); tbl.setEditable(false); scrollPane.setViewportView(tbl);
The problem is that when it gets filled, all the columns are squashed together to fit into the jxtable. I expected the columns to be adjusted according to the width of the column header or column value (which ever is wider) and then for a horizontal scroll bar to be displayed that will enable me to scroll left or right.
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?
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
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?
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.
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!
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.
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.
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?
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 {
I need the user to enter the name of a file and check if the word is contained in the dictionary file.
import java.io.FileNotFoundException; import java.io.FileReader; import java.util.Scanner; public class SpellChecker{ public static void main(String[] args){
[code]....
I need to read the file and separate the words and save them in a collection after read another file and search each line for one of the words in the collection.
I'm not new to java but i'm not able to solve the following issue: I have a class
public class Localizzazioni implements java.io.Serializable { private <complexType> id; public getId()....... public setId().....
The complexType is a class defined in the code somewhere. Now I want to access it in another class I have
Set localizzazioni = new HashSet(0); localizzazioni=opere.getOiLocalizzazioneOperas(); -- this object give an object of tyoe HashSet for(Object object : localizzazioni) { object.get......... // i cannot use any method defined in the class Localizzazioni }
Why I cannot write inside the for object.getId() and using it?? In other word how i can access the element contained in the object?? the object is an iterator of type Localizzazioni . The class Localizzazioni has some method but i cannot use them? why ....
I have been working on this for hours and cannot get it to work properly. The program is to count the number of characters contained in both strings and display the results. It is also to display the final statement, but only once. This version has a complete statement for each matching character.
import java.util.Scanner; public class CountMatches { public static void main(String[] args) { String firstStr = (""); String s1 = firstStr;
My JTable has a row, row number 0, which I always want to be at the top.I tried the following two approaches, both without success:
1- Use a custom table cell renderer for the header, and create a header of two rows. the second row is my JTextField.
Problem: I cannot get the JTextField to function properly. (I've seen examples with a checkbox in the header, but that one just reacts to a click somewhere on the header, my textfield must be editable).
2- Use the first row of the table. This works quite nice. However, I must prevent row 0 to be re-ordered when sorting the table.
I was thinking to add a prefix (either something like "___" or "zzz" depending on current sorting mode), but I do not know which methods to adjust for this exaclty.
Another approach would be to have N textfields above the JTable in some layout (or two JTable's on top of each other).
However, Then I would need to react to the re-ordering and re-sizing of all columns as well, which does not seem easy to me.
I have encountered a very tricky spot in a project that i am working on. I must have a JTable to programmatically select the very last row in an AbstractTableModel. I have tried every thing but nothing works so far.
The problem is is that the JTable only scrolls down to the second last table row in the model? What am i missing?
//Show the very last row in a tablemodel object using the method updateTableRows //after an "insert action event" occurred public void updateViewMode(String name, java.util.List<NetworkSwitch> list, boolean flag) { CableTableModel model = cableTable.getCableModel();
[code]....
What happens is that the only row that gets selected is the second last row of the total rows iny AbstractTableModel object, "CableTableModel"
I am preparing a small solution. Below is how the functionality works.
1. Login Screen 2. Successful Login will take to a MDI Form 3. Click the menu, a JInternalFrame will open in the JDestopPane. 4. JInternalFrame has a JTable. 5. JInternalFrame has a JButton available for adding new data. 6. When JButton is clicked, a new JInternalFrame is popped up with some JTextField and JButton to save the data. 7. After saving the data (after insert query), a JDialog is opened to upload Logo (update query for BLOB), There are two buttons in the JDialog, one is for uploading the image, another one is uploading it later. 8. The logo is displayed in the JDialog and if the JButton, for upload is pressed, update the database and reload the JTable in the JInternalFrame is called.
My challenge is in point 8. The function is called properly, but the table is not getting refreshed.
JButton in JDialog for uploading the Logo private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: JOptionPane.showMessageDialog(this, "Image Uploaded Successfully"); companyConfig cc = new companyConfig(); //cc.reloadTable(); cc.updateTable(); this.dispose();
I've been creating a jTable where I can add / edit /delete new entries. Now i have 2 Questions :
1) My column 0 is filled with the row-number. I created a variable and with each "add" it adds +1 to the variable. That works, but as soon as i delete 1 row there is a gap ( 1..2..4..5..).
My question: Is there another way then mine to handle this?
2) The table is/should be working as some kind of database. The user is able to add Information (height, width,...). Now I want to sum the entries of 1 column (length,...). But as they´re objects I didn´t find a way.
My question: How can I sum the entries of 1 column of a table?
