如果我使用以下代码创建一个新shell：
shell = new Shell( Display.getDefault(), SWT.RESIZE);
然后这给了我一个没有标题栏或最小化/最大化按钮的shell，这就是我想要的。我可以将这个窗口调整到任何大小，这很好。但问题是，窗户固定在它的位置，我不能通过拖动它来移动它。
如果我添加SWT.CASCADE或SWT.CLOSE，这会给我标题栏和关闭按钮，这是我不想要的，但此外，它限制了窗口的小小程度调整大小，即我无法横向调整大小超过一定限度。
如果没有关闭按钮/标题栏，如何使窗口可以移动？如果在SWT中没有本地方式来执行此操作，我可以通过侦听鼠标拖动事件并手动设置shell的位置来实现吗？如果是这样，我如何从鼠标移动中获得鼠标坐标？
帮助将不胜感激。谢谢！
答案 0 :(得分：5)
您需要使用自己的侦听器。下面的代码应该有所帮助： -
public class Demo {
static Boolean blnMouseDown=false;
static int xPos=0;
static int yPos=0;
public static void main(final String[] args) {
Display display=new Display();
final Shell shell = new Shell( Display.getDefault(), SWT.RESIZE);
shell.open();
shell.addMouseListener(new MouseListener() {
@Override
public void mouseUp(MouseEvent arg0) {
// TODO Auto-generated method stub
blnMouseDown=false;
}
@Override
public void mouseDown(MouseEvent e) {
// TODO Auto-generated method stub
blnMouseDown=true;
xPos=e.x;
yPos=e.y;
}
@Override
public void mouseDoubleClick(MouseEvent arg0) {
// TODO Auto-generated method stub
}
});
shell.addMouseMoveListener(new MouseMoveListener() {
@Override
public void mouseMove(MouseEvent e) {
// TODO Auto-generated method stub
if(blnMouseDown){
shell.setLocation(shell.getLocation().x+(e.x-xPos),shell.getLocation().y+(e.y-yPos));
}
}
});
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.close();
}
}
答案 1 :(得分：3)
这是我的实施：
/**
* Class to allow user to move a shell without a title.
*
* @author Laurent Muller
* @version 1.0
*/
public class MoveShellListener implements Listener {
/*
* the parent shell
*/
private final Shell parent;
/*
* the mouse down location
*/
private Point ptMouseDown;
/**
* Creates a new instance of this class.
*
* @param parent
* the shell to handle.
*/
public MoveShellListener(final Shell parent) {
if (parent == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
if (parent.isDisposed()) {
SWT.error(SWT.ERROR_WIDGET_DISPOSED);
}
// copy and add listener
this.parent = parent;
addControl(parent);
}
/**
* Adds the given control to the list of listened controls. If the given
* control is an instance of {@link Composite}, the children controls are
* also added.
*
* @param control
* the control to add.
*/
public void addControl(final Control control) {
// check control
if (isDisposed(control) || control.getShell() != parent) {
return;
}
// add listeners
control.addListener(SWT.MouseDown, this);
control.addListener(SWT.MouseUp, this);
control.addListener(SWT.MouseMove, this);
// children
if (control instanceof Composite) {
final Control[] children = ((Composite) control).getChildren();
for (final Control child : children) {
addControl(child);
}
}
}
/**
* Adds the given controls to the list of listened controls. If one of the
* given controls is an instance of {@link Composite}, the children controls
* are also added.
*
* @param controls
* the controls to add.
*/
public void addControls(final Control... controls) {
if (controls != null) {
for (final Control control : controls) {
addControl(control);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void handleEvent(final Event e) {
switch (e.type) {
case SWT.MouseDown:
onMouseDown(e);
break;
case SWT.MouseUp:
onMouseUp(e);
break;
case SWT.MouseMove:
onMouseMove(e);
break;
}
}
/**
* Removes the given control to the list of listened controls. If the given
* control is an instance of {@link Composite}, the children controls are
* also removed.
*
* @param control
* the control to remove.
*/
public void removeControl(final Control control) {
// check control
if (control == parent || isDisposed(control)
|| control.getShell() != parent) {
return;
}
// remove listeners
control.removeListener(SWT.MouseDown, this);
control.removeListener(SWT.MouseUp, this);
control.removeListener(SWT.MouseMove, this);
// children
if (control instanceof Composite) {
final Control[] children = ((Composite) control).getChildren();
for (final Control child : children) {
removeControl(child);
}
}
}
/**
* Removes the given controls to the list of listened controls. If one of
* the given controls is an instance of {@link Composite}, the children
* controls are also removed.
*
* @param controls
* the controls to remove.
*/
public void removeControls(final Control... controls) {
if (controls != null) {
for (final Control control : controls) {
removeControl(control);
}
}
}
/**
* Checks if the given control is null or disposed.
*
* @param control
* the control to verify.
* @return true if the control is null or
* disposed.
*/
private boolean isDisposed(final Control control) {
return control == null || control.isDisposed();
}
/**
* Handles the mouse down event.
*
* @param e
* the event data.
*/
private void onMouseDown(final Event e) {
if (e.button == 1) {
ptMouseDown = new Point(e.x, e.y);
}
}
/**
* Handles the mouse move event.
*
* @param e
* the event data.
*/
private void onMouseMove(final Event e) {
if (ptMouseDown != null) {
final Point location = parent.getLocation();
location.x += e.x - ptMouseDown.x;
location.y += e.y - ptMouseDown.y;
parent.setLocation(location);
}
}
/**
* Handles the mouse up event.
*
* @param e
* the event data.
*/
private void onMouseUp(final Event e) {
ptMouseDown = null;
}
}