I've a problem that is driving me crazy.
I have a classic JTable, with several columns. I need that a particular column, instead of simple texts values in its cell, it must contain a ComboBox. I searched A LOT, all I found was examples that would implement the same JComboBox in each cell of the column, that it's not what I need: I need that each cell of the column has a combo box with different values.
Can anyone give me some practical example of how to do it, please?
Thanks.
PS: I'm using NetBeans.
The TableCellEditor.getTableCellEditorComponent() method takes a row as argument. Use the existing example as a guide, and use the row argument of this method to decide which values must be proposed by the combo box.
Related
Is there any way that I can make the suggestions box wider without actually changing the width of that jtable column? I want to make the suggestion box wider than the actual jcombobox.
The standard way is to use the JComboBox.setPrototypeDisplayValue() method; ideally you'd pass in the longest item so that the combobox can set a good default width.
This is briefly touched upon in the GlazedLists Developer Tutorials; see "AutoCompleteSupport Screencast" for the walkthrough.
I'm trying to imitate some Excel spreadsheet functionality on my JTable, specifically what I've been calling cell spillover or cell overflow. This occurs when you fill a cell with text with a wider width than the cell is set to. If there is no text in the cell to its right, the words simply keep going into the next cell and beyond.
I feel like this would be accomplished somehow with TableCellRenderer, but I do not know how.
Any help would be much appreciated
I dont know because you did not give alot of detail but a simple use case would be:
When text is entered check for the amount of characters
Check for the width of the cell and look if the text fits
If the text doesnt fit check if the cell next to this one has text
If it has no text, resize the cell to fit the text and make the one next to it smaller.
Or something like that.
But i dont know if JTable allows resizing of individual cells, you should check the JTable API.
http://docs.oracle.com/javase/6/docs/api/javax/swing/JTable.html
And i dont know if there is not a better way, so you should consult API documentation and examples.
For example: http://users.csc.calpoly.edu/~jdalbey/305/Lectures/TableCellRendererExamples.html
I hope it helps you.
No, a TableCellRenderer cannot span cells. As alternatives, consider these:
TablePopupEditor, a custom TableCellEditor, can be adapted to serve as a renderer.
A ListSelectionListener, shown here, can be added to an adjacent component in order to display details of the selected row, perhaps using a JScrollPane.
here are the screenshots of the application
Rows will be displayed in the Table according to the text which is written in the search textfield.
Now i want to mark that particular text as per the shown in the second image with the yellow color
I know how to select a row or a particular cell.
but I don't know how to select a particular text inside the cell of any row in the table.
I am guessing you know how to search in JTable, so I am not pasting code of it here.
You can look over the SwingX library. It has this kind of function as you said predefined it it. You just need to add it to your table. This is where you can find it. Give it a try you will surely like it.
The basic premise would be to use a custom TableCellRenderer that provided the functionality that you require.
The problem is how to implement it.
I would create a TableCellRenderer based on a JTextField, remove it's border and make it transparent. This will allow you to use the text highlighting functionality provided by JTextCompoent to highlight portions of the text, as demonstrated here.
The next problem is then knowing what to highlight. There are a number of possibilities.
You could provide a method in your table model that could return the current text that should be highlighted.
I'd, personally, probably use the JTable#putClientProperty and JTable#getClientProperty methods to seed the search text.
Or, you could actually provide a simple model that directly to the renderer which had a method that returned the current search text. This might actually be more useful as you could link it to field, the method building the filter and the renderers and allow them to simply seed each other
I'm trying to set the number of options shown in the JComboBox drop down list when it is used as a JTable RowFilter. Specifically, the filter on occasion can have many options and I'd like to show twice as many as the default (which appears to be 8). See this image:
Combox Box Example http://aalto.tv/test/combobox-image.png
As you can hopefully see, this ComboBox only shows 8 items and I would like to show more if there are more to be seen.
Having searched around the popular solution is to call "setMaximumRowCount" on the JComboBox, however this is having no effect.
Can any one point me in the right direction?
Many thanks for any and all help!
Cheers,
Alex
try the revalidate() (or repaint()) method after setting the rowcount;
if a setXX method does not generate an event to the component, then you have to manually reset it.
failing that, look at the source code of the setMaximumRowCount() method
JComboBox#setMaximumRowCount works for JTable / TableHeader and AutoComplete JComboBox in the JTable too
I have a JTable with column headers. When I click on a column header the data gets sorted. This is the default sort behavior.
The thing is that I need to remember the last column the user clicked to sort. Anyone knows which listener I need to implement in order to catch the column name that user clicked for sorting on the JTable?
The code is already implemented and I'm new to Swing. I just need to add that extra functionality. So any clues will be helpful.
Thanks in advance.
You can add a MouseListener to the JtableHeader. Then you just use the columnAtPoint(...) method to determine when a column is clicked.
Use Swing-X components, there is a JXTable which is more powerful than JTable.