So Suppose I create a JTable with a specific number of columns and rows. Is it possible to add a JPanel to a specific cell after the JTable is already initialized? The JTable would be empty at first and then I would change a cell at row X and column Y to instead contain a JPanel which would contain an amount of ImageIcons. I don't have any code to put here really, I just need to know what I would have to use to accomplish this and how. Thank you.
To change the data in the table you use:
table.setValueAt(...);
This will update the data in the TableModel.
However, adding a JPanel to the table is not the way a table is designed to be used. Typically you add data to the model. Then you use a renderer to display the data in a cell.
Start by reading the section from the Swing tutorial on Using Custom Renderers for more information and examples.
Related
I have to develop a front end in Swing.I have a JFrame in Netbeans with 3 panes in it.
JScrollPane 1:it contains a JTable
JScrollPane 2: It should display the value of the fields of the selected row
ListPane : which contains the list of tables from which a user chooses a table to be displayed.
Now since the content of JTable varies(the no of rows and columns also vary) dynamically based on the table chosen by user I can't drag and drop the TextBoxes in the 3rd scroll pane to display the selected row's values.It would be helpful if anybody can suggest a way to do it or any pointers to problems that deal with similar issue
Add a ListSelectionListener to your JList. When a particular table is selected from the list, use setModel() to change the TableModel of your JTable to one that is correct for the chosen table. A related example using setModel() is shown here.
I use jPanel as my cell and the table has just one column. It looks like this ( JTable: Buttons in Custom Panel in Cell ).
By default, the panel associated with the row (celll) contains a date when it was created. i want to implement an ActionListere method that will extend( slide down) the jpanel in which the action occured to see the whole jPanel data.
Hope you get what i mean.
Basically, you want to do the same thing that JList.ensureIndexIsVisible(int) but with a table.
Component has a method called "scrollRectToVisible(Rectangle aRect)" which should just about do what you need.
So, using your JTable, you can get the cellRect(int width, int height, boolean includingSpacing) and pass it off to the "scrollRectToVisible"
You're going to have to do some clever work to find out the row of the action, but I assume that you are using a table cell editor which has already provided you with this information
Is there a way to keep the first column of a JTable embedded inside a JScrollPane static on scrolling the mouse horizontally.The table contains more than 50 columns.
There is an example of this on this Swing examples site. The author creates two tables, putting one of them in the scrollpane. They both share the same model. He then ties their selection logic together. The full code is available on the page.
Im creating a table which is dynamically changing its width. And I add columns by time as well. And I have bounded this table to a scrollpane. Here I have set the auto resizing to false in the JTable (else it will fill the whole area from the beginning).
And I'm adding images to cells using cellrenderer as well. Now I need to allow users to resize this table columns.
Any idea?
I don't understand the question, by default the user is allowed to resize the columns by dragging the header of the column.
However if you want this to happen automatically then you can try using the Table Column Adjuster, which can automatically adjust the columns to fit the size of the data.
Well first of all - just change TableModel. You can leave column resizing on and for example set maximum width of cell by using setMaxWidth
Or just pick correct mode that fits your requirements. You can find them here.
I want to implement following functionality but I am confused if it's possible in Java. If yes, than how? Please help:
I want to create a JTable kind of table where 1st row of table contains column names and an icon in each column i.e. in each cell of 1st row. Clicking on that icon should lead to removal of that column from table (possible using MouseListener??).
I have found many solution where I can add button to a cell in JTable but none which describes adding both text and icon (with MouseListener) to a cell. Please see if you can help and thanks a lot for reading.
You can create a custom TableCellRenderer that extends JLabel. This JLabel can be created with an icon (JLabel can display icons, to the right or left of the text). You will want the getTableCellRendererComponent to test wether the row being rendered is the first or not, and if so, set the icon, otherwise do not.
For the removal action, you can add a MouseListener on the table, and when processing the mouseClicked method, you can find the cell that was clicked in by testing the rowAtPoint and columnAtPoint by creating a Point from the mouseEvent.getX() and mouseEvent.getY(). If you determine the first row with the icon was clicked, you can remove the column from the column model.
If by 1st row, you actually mean the table header, you can create the same renderer for the JTableHeader, and set the MouseListener on that component.
Well, I don't understand your question.
I want to create a JTable kind of
table where 1st row of table contains
column names and an icon
Do you mean the Table Header, like the way sorting works by displaying the column name and the sort direction?
If so then you use a custom renderer for the table header and add a MouseListener to the header to determine which column was clicked. You should be able to customize the Default Table Header Renderer to do what you want.
Or do you mean the first row of data in the table. If so then you still need to use a custom renderer but this time you add the MouseListener to the table not the table header.
In both cases you can use the TableColumnModel.removeColumn() method to remove the column from the view of the table.