If extending DefaultTableCellRenderer is insufficient, you can build a renderer using another superclass. Instead, a single cell renderer is generally used to draw all of the cells ckurs contain the same type of data. A table model can have a set of listeners that are notified whenever the table data changes. Here is typical code for creating a scroll pane that serves as a container for a table:.
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You just create a subclass and implement the setValue method so that it invokes setText or setIcon with the appropriate jtbale or image. In this case, the second column has the first sort key, so they rows are sorted by first name, then last name.
If you clear all three check boxes setting all three bound properties to falsethere is no selection; only the lead selection is shown. The code is fairly straightforward, except perhaps for the call to convertColumnIndexToModel. Every table object uses a table model object to manage the actual table data.
As you can see, the code is pretty simple. The easiest way is to create a subclass of an existing component, making your subclass implement the TableCellRenderer interface. For more on Printablerefer to the Printing lesson in the 2D Graphics trail. The following code makes the formatted text field the editor for all columns that contain data of type Integer. By default, all columns in a table start out with equal width, and the columns automatically fill the entire width of the table.
Then, after making sure the rendering component is a JComponentinvoke the setToolTipText method on it. When the user begins editing a cell in the Favorite Color column, a button the true cell editor appears and brings up the dialog, with which the user can choose a different color. If you implement a class used as a column data type, you can use the default editor if your class supplies a constructor that takes a single argument of type String.
When using a sorter, always remember to translate cell coordinates. The easiest way jtabe provide a sorter object is to set autoCreateRowSorter bound property to true:.
You might cuors each cell in a table to be a component. You can specify selection by cell in multiple interval selection mode, but the result is a table that does not produce useful selections. The scroll pane automatically places the table header at the top of the viewport. Notice the outline around the last cell clicked; this is how the Metal look and feel highlights the lead selection. A class that implements this interface must provide a method called compare that defines how any two objects are compared for the purpose of sorting.
Here is an example that sorts the table used in the examples by the first two columns. In the screenshot below, a user has run the program, clicked in the first row, then control-clicked in the third row.
You may also notice that changing any of the three selection options can affect the others. How to Use Tables It might even generate the data at execution time. The user can select jvaa contiguous range of rows or an arbitrary set of rows. Generally, you implement your table model in a subclass of the AbstractTableModel class.
In its default configuration, a table supports a selection that consists of one or more rows. To retrieve the current selection, use JTable. TOP Related Posts.
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