Dragging buttons
I am relatively new to swing and need some help or direction in respect to dragging buttons. Specifically, dragging a button and placing it in between other buttons. I have an array of buttons currently, and I want to be able to pick any one of them, and drag them in between another. I have read up a bit on DnD, but I dont think its what I need, since im dragging buttons within the same frame.
Anyways, i just need direction. Any help is greatly appreciated.
[475 byte] By [
MuriloGa] at [2007-11-26 18:03:51]
# 1
Check out my Draggable class
You are free to use and modify this class, but please don't change the package or take credit for it as your own work
tjacobs.ui.Draggable
================
package tjacobs.ui;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
/**
* tjacobs.ui.Draggable
* Makes a component draggable. Does not work if there's a layout manager
* messing with things
* <code>
* usage:
* Component c = ...
* new Draggable(c);
* parent.add(c);
* </code>
*/
public class Draggable extends MouseAdapter implements MouseMotionListener {
Point mLastPoint;
Component mDraggable;
public Draggable(Component w) {
w.addMouseMotionListener(this);
w.addMouseListener(this);
mDraggable = w;
}
public Draggable(Window w, Component drag) {
drag.addMouseMotionListener(this);
drag.addMouseListener(this);
mDraggable = w;
}
public void mousePressed(MouseEvent me) {
if (mDraggable.getCursor().equals(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR))) {
mLastPoint = me.getPoint();
}
else {
mLastPoint = null;
}
}
private void setCursorType(Point p) {
Point loc = mDraggable.getLocation();
Dimension size = mDraggable.getSize();
if ((p.y + WindowUtilities.RESIZE_MARGIN_SIZE < loc.y + size.height) && (p.x + WindowUtilities.RESIZE_MARGIN_SIZE < p.x + size.width)) {
mDraggable.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
}
}
public void mouseReleased(MouseEvent me) {
mLastPoint = null;
}
public void mouseMoved(MouseEvent me) {
setCursorType(me.getPoint());
}
public void mouseDragged(MouseEvent me) {
int x, y;
if (mLastPoint != null) {
x = mDraggable.getX() + (me.getX() - (int)mLastPoint.getX());
y = mDraggable.getY() + (me.getY() - (int)mLastPoint.getY());
mDraggable.setLocation(x, y);
}
}
}
