Andre Uhres

Evgeny Krylov wrote:

Melki Joe wrote:Hi Craig Wood,

I too have a problem in JTree that is I want to move the JTree nodes to another JTree without changing its structure. but only the selected nodes should move. Help me in this issue.

Thank you.

Hi Melki Joe .
See my solution

Your code might be of public interest, if only it were compilable. Here ist only one example of many broken statements in your code:
for(int i=0;i vpath.add(path[i].toString()); }

Evgeny Krylov wrote:Any info about? I mean dnd entire subtree of tree not only leaf.

TreeDnd.jar (the source code is also included in the jar file)

Sasika Thiranga wrote:I have form with jtable and Button call print.What i want to do is
print the contents of a jtable with landscape when print button click.
And i don't want print defualt setting form to display.
I can't manage this... any suggestions?

Please try this:
... private HashPrintRequestAttributeSet attr; ... private void printJTable() throws PrinterException { // possibly prepare the table for printing here first // wrap in a try/finally so table can be restored even if something fails try { // fetch the printable Printable printable = table.getPrintable(JTable.PrintMode.FIT_WIDTH, null, null); PrinterJob job = PrinterJob.getPrinterJob();// fetch a PrinterJob job.setPrintable(printable);// set the Printable on the PrinterJob // create an attribute set to store attributes if (attr == null) { attr = new HashPrintRequestAttributeSet(); attr.add(OrientationRequested.LANDSCAPE); } // display a print dialog and record whether or not the user cancels it // boolean printAccepted = job.printDialog(attr); // if (printAccepted) {// if the user didn't cancel the dialog job.print(attr);// do the printing // } } finally { // possibly restore the original table state here } } ...

We use a custom cell renderer, something like this:
tree.setCellRenderer(new DefaultTreeCellRenderer() { @Override public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) { super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus); Object userObject = ((DefaultMutableTreeNode) value).getUserObject(); if (userObject instanceof File) { setIcon(FileSystemView.getFileSystemView().getSystemIcon((File) userObject)); setText(((File)userObject).getName()); } return this; } });

Gregg Bolinger wrote:Then changing the name of 'user' will change the name of the nodes label.

To refresh the GUI we also need to call nodeChanged:
defaultTreeModel.nodeChanged(node);

Alan Brooks wrote:This is being done already and does not help

Could you please post a short independant and compilable example?

Each time, before calling populateTree(), we should initialize again "rootNode" and "treeModel" and set the "treeModel" to the tree:
rootNode = new DefaultMutableTreeNode("Root"); treeModel = new DefaultTreeModel(rootNode); tree.setModel(treeModel); populateTree();

Olivier Legat wrote:How can I decide which components are on top?

We can implement a special container for the Draggables and dispatch mouse events from the Draggables to the container.
In "mouseReleased", the container can go through it's components:
Component[] comps = getComponents();
and assign zorder 0 (=top) to the last component intersecting the mouse position.
That way we are able to cycle through overlapping labels with mouse clicks.

To simple make the pressed Draggable come to top, we can add this in mousePressed of Draggable:
((JComponent) getParent()).setComponentZOrder(Draggable.this, 0); repaint();

Olivier Legat wrote:I'm trying to place a "draggable" Component inside a Panel. What I mean by that is I want to be able to have something like a JLabel for example that can moved around the Panel from one position to another

With JPanel(null) and using label.setLocation(..), we can drag any JLabel having a MouseMotionListener and a MouseListener.

As an example, here is a simple "Draggable" class which can wrap any JComponent that we want to make draggable. It contains a main method to show how to use it:
/* * Draggable.java */ import java.awt.*; import javax.swing.*; import java.awt.event.MouseEvent; import javax.swing.border.Border; import javax.swing.event.MouseInputAdapter; public class Draggable extends JComponent { private Point pointPressed; private JComponent draggable; public Draggable(final JComponent component, final int x, final int y) { draggable = component; // draggable.setCursor(draggable.getCursor()); setCursor(new Cursor(Cursor.HAND_CURSOR)); setLocation(x, y); setSize(component.getPreferredSize()); setLayout(new BorderLayout()); add(component); MouseInputAdapter mouseAdapter = new MouseHandler(); addMouseMotionListener(mouseAdapter); addMouseListener(mouseAdapter); } @Override public void setBorder(final Border border) { super.setBorder(border); if (border != null) { Dimension size = draggable.getPreferredSize(); Insets insets = border.getBorderInsets(this); size.width += (insets.left + insets.right + 5); size.height += (insets.top + insets.bottom); setSize(size); } } private class MouseHandler extends MouseInputAdapter { @Override public void mouseDragged(final MouseEvent e) { Point pointDragged = e.getPoint(); Point loc = getLocation(); loc.translate(pointDragged.x - pointPressed.x, pointDragged.y - pointPressed.y); setLocation(loc); } @Override public void mousePressed(final MouseEvent e) { pointPressed = e.getPoint(); } } //for testing only: public static void main(final String[] args) { Runnable gui = new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName()); } catch (Exception ex) { } JFrame f = new JFrame("Draggable Components"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setSize(300, 300); f.setLocationRelativeTo(null); JPanel panel = new JPanel(null); JLabel label = new JLabel("Hello World"); Draggable d1 = new Draggable(label, 50, 50); panel.add(d1); JTextField textfield = new JTextField("JTextField"); Draggable d2 = new Draggable(textfield, 150, 150); d2.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); panel.add(d2); JTable table = new JTable(2, 2); Draggable d3 = new Draggable(table, 50, 200); d3.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); panel.add(d3); f.add(panel); f.setVisible(true); } }; //GUI must start on EventDispatchThread: SwingUtilities.invokeLater(gui); } }

You may want to consider this parser:Parser for mathematical formulas

Originally posted by pete stein:
But I'm guessing that you are already quite familiar with Swing programming, correct?

Correct. I wouldn't recommend a Gui builder for beginners.

We can use a modal JDialog (instead of JFrame):
http://java.sun.com/docs/books/tutorial/uiswing/components/dialog.html

I use the NetBeans Gui builder, but coding from scratch is better for advanced features.

Yes we can

One way is using setValueAt:
model.setValueAt(null, 0, 0);