public class FileDrop extends Object
JPanel myPanel = new JPanel();
new FileDrop( myPanel, new FileDrop.Listener()
{ public void filesDropped( java.io.File[] files )
{
// handle file drop
...
} // end filesDropped
}); // end FileDrop.Listener
You can specify the border that will appear when files are being dragged by
calling the constructor with a javax.swing.border.Border. Only
JComponents will show any indication with a border.
You can turn on some debugging features by passing a PrintStream
object (such as System.out) into the full constructor. A null
value will result in no extra debugging information being output.
I'm releasing this code into the Public Domain. Enjoy.
Original author: Robert Harder, rharder@usa.net
Modifier and Type | Class and Description |
---|---|
static interface |
FileDrop.Listener
Implement this inner interface to listen for when files are dropped.
|
Constructor and Description |
---|
FileDrop(Component c,
boolean recursive,
FileDrop.Listener listener)
Constructor with a default border and the option to recursively set drop targets.
|
FileDrop(Component c,
Border dragBorder,
boolean recursive,
FileDrop.Listener listener)
Constructor with a specified border and the option to recursively set drop targets.
|
FileDrop(Component c,
Border dragBorder,
FileDrop.Listener listener)
Constructor with a specified border
|
FileDrop(Component c,
FileDrop.Listener listener)
|
FileDrop(PrintStream out,
Component c,
boolean recursive,
FileDrop.Listener listener)
Constructor with a default border, debugging optionally turned on
and the option to recursively set drop targets.
|
FileDrop(PrintStream out,
Component c,
Border dragBorder,
boolean recursive,
FileDrop.Listener listener)
Full constructor with a specified border and debugging optionally turned on.
|
FileDrop(PrintStream out,
Component c,
Border dragBorder,
FileDrop.Listener listener)
Constructor with a specified border and debugging optionally turned on.
|
FileDrop(PrintStream out,
Component c,
FileDrop.Listener listener)
Constructor with a default border and debugging optionally turned on.
|
Modifier and Type | Method and Description |
---|---|
static void |
main(String[] args)
Runs a sample program that shows dropped files
|
static boolean |
remove(Component c)
Removes the drag-and-drop hooks from the component and optionally
from the all children.
|
static boolean |
remove(PrintStream out,
Component c,
boolean recursive)
Removes the drag-and-drop hooks from the component and optionally
from the all children.
|
public FileDrop(Component c, FileDrop.Listener listener)
FileDrop
with a default light-blue border
and, if c is a Container
, recursively
sets all elements contained within as drop targets, though only
the top level container will change borders.c
- Component on which files will be dropped.listener
- Listens for filesDropped.public FileDrop(Component c, boolean recursive, FileDrop.Listener listener)
c
- Component on which files will be dropped.recursive
- Recursively set children as drop targets.listener
- Listens for filesDropped.public FileDrop(PrintStream out, Component c, FileDrop.Listener listener)
out
- PrintStream to record debugging info or null for no debugging.c
- Component on which files will be dropped.listener
- Listens for filesDropped.public FileDrop(PrintStream out, Component c, boolean recursive, FileDrop.Listener listener)
out
- PrintStream to record debugging info or null for no debugging.c
- Component on which files will be dropped.recursive
- Recursively set children as drop targets.listener
- Listens for filesDropped.public FileDrop(Component c, Border dragBorder, FileDrop.Listener listener)
c
- Component on which files will be dropped.dragBorder
- Border to use on JComponent when dragging occurs.listener
- Listens for filesDropped.public FileDrop(Component c, Border dragBorder, boolean recursive, FileDrop.Listener listener)
c
- Component on which files will be dropped.dragBorder
- Border to use on JComponent when dragging occurs.recursive
- Recursively set children as drop targets.listener
- Listens for filesDropped.public FileDrop(PrintStream out, Component c, Border dragBorder, FileDrop.Listener listener)
out
- PrintStream to record debugging info or null for no debugging.c
- Component on which files will be dropped.dragBorder
- Border to use on JComponent when dragging occurs.listener
- Listens for filesDropped.public FileDrop(PrintStream out, Component c, Border dragBorder, boolean recursive, FileDrop.Listener listener)
out
- PrintStream to record debugging info or null for no debugging.c
- Component on which files will be dropped.dragBorder
- Border to use on JComponent when dragging occurs.recursive
- Recursively set children as drop targets.listener
- Listens for filesDropped.public static boolean remove(Component c)
Container
.c
- The component to unregister as a drop targetpublic static boolean remove(PrintStream out, Component c, boolean recursive)
out
- Optional PrintStream
for logging drag and drop messagesc
- The component to unregisterrecursive
- Recursively unregister components within a containerpublic static void main(String[] args)
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