问题
Is there a possibility to move window by clicking on one of the panels in the window when that window is undecorated?
I have a main panel with matte border 40 pixels size, and few panels with controls inside, and I would like to move the window when clicking on that border. Is that possible?
回答1:
You can place another panel over the panel with the border, leaving the border visible.Use the following code to move your window.
public class MotionPanel extends JPanel{
private Point initialClick;
private JFrame parent;
public MotionPanel(final JFrame parent){
this.parent = parent;
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
initialClick = e.getPoint();
getComponentAt(initialClick);
}
});
addMouseMotionListener(new MouseMotionAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
// get location of Window
int thisX = parent.getLocation().x;
int thisY = parent.getLocation().y;
// Determine how much the mouse moved since the initial click
int xMoved = e.getX() - initialClick.x;
int yMoved = e.getY() - initialClick.y;
// Move window to this position
int X = thisX + xMoved;
int Y = thisY + yMoved;
parent.setLocation(X, Y);
}
});
}
}
I've been working with this code for a while now to make a custom titlebar for undecorated windows. P.S.:You can generalize this example by extending JComponent instead of JPanel.
回答2:
I have a main panel with matte border 40 pixels size, and few panels with controls inside, and I would like to move the window when clicking on that border
I think that ComponetMover by @camickr is right class for you
回答3:
Yes, it is very possible. You need a MouseListener to listen on mouse events. you start moving on mousedown and stop moving on mouseup. Then you simply translate the window position by the same amount the mouse translates during that phase (calculate the delta bewteen old mouse position and new mouse position and add that to the frames position). You should be able to do this with a mouse listener fairly easily.
回答4:
I have a simple solution from my project. Here is my undecorated JDialog class.
public class TimerDialog extends JDialog {
// some fields here
private Point mouseClickPoint; // Will reference to the last pressing (not clicking) position
private TimerDialog() {
initComponents();
addEventsForDragging();
}
private void addEventsForDragging() {
// Here is the code does moving
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
mouseClickPoint = e.getPoint(); // update the position
}
});
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
Point newPoint = event.getLocationOnScreen();
newPoint.translate(-mouseClickPoint.x, -mouseClickPoint.y); // Moves the point by given values from its location
setLocation(newPoint); // set the new location
}
});
}
private void initComponents() {
setLayout(new FlowLayout());
// adding components
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
setAlwaysOnTop(true);
setUndecorated(true);
setResizable(false);
pack();
}
}
回答5:
This code works very well with single monitor. It uses a simple mouselistener and mouse motion listener, which do some basic algebra do move the frame.
class Frame extends JFrame{
private int framePositionX, framePositionY, mousePositionX, mousePositionY, newMousePositionX, newMousePositionY;
Frame(){
addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent mouseEvent) {
framePositionX = mouseEvent.getComponent().getX();
framePositionY = mouseEvent.getComponent().getY();
mousePositionX = mouseEvent.getX();
mousePositionY = mouseEvent.getY();
}
@Override
public void mousePressed(MouseEvent mouseEvent) {
framePositionX = mouseEvent.getComponent().getX();
framePositionY = mouseEvent.getComponent().getY();
mousePositionX = mouseEvent.getX();
mousePositionY = mouseEvent.getY();
}
@Override public void mouseReleased(MouseEvent mouseEvent) { }
@Override public void mouseEntered(MouseEvent mouseEvent) { }
@Override public void mouseExited(MouseEvent mouseEvent) { }
});
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
newMousePositionX = e.getX();
newMousePositionY = e.getY();
int newFramePositionX = (newMousePositionX - mousePositionX)+ framePositionX;
int newFramePositionY = (newMousePositionY - mousePositionY)+ framePositionY;
e.getComponent().setLocation(newFramePositionX, newFramePositionY);
}
});
setUndecorated(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
}
回答6:
int xMoved = (thisX + e.getX()) - (thisX + initialClick.x);
thisX + -thisX = 0
int xMoved = e.getX()-initialClick.x;
What i'm using.
public class MouseLiestenerX implements MouseListener,MouseMotionListener{
private theFrame;
public MouseLiestenerX(Frame theFrame){
this.theFrame = theFrame;
}
private Point startClick;
public void mouseDragged(MouseEvent e) {
int deltaX = e.getX()-startClick.x;
int deltaY = e.getY()-startClick.y;
Core.getSp().setLocation(theFrame.getLocation().x+deltaX, theFrame.getLocation().y+deltaY);
}
public void mousePressed(MouseEvent e) {
startClick = e.getPoint();
}
public void mouseMoved(MouseEvent e){
}
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
}
}
and in your Frame constructor
MouseLiestenerX IMove = new MouseLiestenerX(this);
addMouseListener(IMove);
addMouseMotionListener(IMove);
来源：https://stackoverflow.com/questions/10773713/moving-undecorated-window-by-clicking-on-jpanel