Technically speaking, the framework for drag and drop supports
all Swing components — the data transfer mechanism is built
into every
JComponent. If you wanted,
you could implement drop support for a
JSlider
so that it could fully participate in data transfer.
While
JSlider does not support drop by default,
the components you would want (and expect) to support
drag and drop do provide specialized built-in support.
The following components recognize the drag gesture
once the setDragEnabled(true) method is
invoked on the component. For example, once you invoke
myColorChooser.setDragEnabled(true) you can drag colors
from your color chooser:
JColorChooser
JEditorPane
JFileChooser
JFormattedTextField
JList
JTable
JTextArea
JTextField
JTextPane
JTree
The following components support drop out of the box.
If you are using one of these components, your work is done.
JEditorPane
JFormattedTextField
JPasswordField
JTextArea
JTextField
JTextPane
JColorChooser
The framework for drop is in place for the following components,
but you need to plug in a small amount of code to customize the
support for your needs.
For these critical components, Swing performs the drop location
calculations and rendering; it allows you to specify a drop mode;
and it handles component specific details, such as tree expansions.
Your work is fairly minimal.
Note: You can also install drop support on top-level containers, such
as
JFrame and
JDialog. You can learn
more about this in
Top-Level Drop.
