Here is a class for tracking mouse position. I haven't done the
testing, but I'd guess it has a significant performance penalty.
Every mouse movement triggers many extra operations, now. Hopefully
it at least gets you started, though!
//Copyright (c) 2009 Jason Carver, Slique
//MIT License
public static class MousePosition {
public static int x,y;
public static void setMouseLocation(int newx, int newy){
x = newx;
y = newy;
}
public static native void trackMousePos() /*-{
var updateMousePos =
@org.slique.client.sliqueJS.MousePosition::setMouseLocation(II);
var mouseCoords = function (ev){
if(ev.pageX || ev.pageY){
return {x:ev.pageX, y:ev.pageY};
}
return {
x:ev.clientX + $wnd.document.body.scrollLeft -
$wnd.document.body.clientLeft,
y:ev.clientY + $wnd.document.body.scrollTop -
$wnd.document.body.clientTop
};
}
var mouseMove = function (ev){
ev = ev || $wnd.window.event;
var mousePos = $wnd.mouseCoords(ev);
updateMousePos(mousePos.x, mousePos.y);
};
$wnd.document.onmousemove = mouseMove;
}-*/;
}
Cheers,
Carver
http://slique.com - builds group memory by putting all your group's
email, files and documents in one place
I'm not being curt, I'm just using http://five.sentenc.es/
On Jul 15, 4:45 pm, Carver <[email protected]> wrote:
> There is an issue posted for adding a keyboard listener to the
> document
> here:http://code.google.com/p/google-web-toolkit/issues/detail?id=1442
>
> Based on the GWT team response to that issue, I would assume that
> there is not going to mouse listener support for the entire document
> anytime soon.
>
> Whenever something doesn't have a good api yet in GWT, you can always
> roll your own with JSNI. Something like this would be my approach:
>
> public class MousePosition {
> public static int x,y;
> private static MouseMoveEvent mouseEvent; //from
> com.google.gwt.event.dom.client.MouseMoveEvent
>
> public static void setMouseEvent(MouseMoveEvent e){
> mouseEvent = e;
> x = mouseEvent.getX();
> y = mouseEvent.getY();
> sliqueJS.log.info("latest mouse event position (X,Y) = "+x
> +","+y);
> }
> public static native void trackMousePos() /*-{
> $wnd.document.onmousemove =
> @com.slique.input.MousePosition::setMouseEvent(Lcom/google/gwt/event/
> dom/client/MouseMoveEvent;);
> }-*/;
>
> }
>
> Unfortunately, code is spewing an error I don't recognize. Can anyone
> else tell what's going on here?
>
> java.lang.IllegalArgumentException
> at sun.reflect.GeneratedMethodAccessor45.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:
> 103)
> at com.google.gwt.dev.shell.ie.IDispatchImpl.callMethod
> (IDispatchImpl.java:126)
> at com.google.gwt.dev.shell.ie.MethodDispatch.invoke
> (MethodDispatch.java:97)
> at com.google.gwt.dev.shell.ie.IDispatchImpl.Invoke
> (IDispatchImpl.java:294)
> at com.google.gwt.dev.shell.ie.IDispatchImpl.method6
> (IDispatchImpl.java:194)
> at org.eclipse.swt.internal.ole.win32.COMObject.callback6
> (COMObject.java:117)
> at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
> at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:1925)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
> at com.google.gwt.dev.SwtHostedModeBase.processEvents
> (SwtHostedModeBase.java:297)
> at com.google.gwt.dev.HostedModeBase.pumpEventLoop
> (HostedModeBase.java:565)
> at com.google.gwt.dev.HostedModeBase.run(HostedModeBase.java:411)
> at com.google.gwt.dev.HostedMode.main(HostedMode.java:243)
>
> ~Carverhttp://slique.com- builds group memory by putting all your group's
> email, files and documents in one place
>
> On Jul 15, 4:22 am, Frank <[email protected]> wrote:
>
> > With a simple javascript I can have the mouseposition anytime:
>
> > <!--
> > document.onmousemove = mouseMove;
>
> > function mouseMove(ev){
> > ev = ev || window.event;
> > var mousePos = mouseCoords(ev);
>
> > //document.Show.MouseX.value = mousePos.x;
> > //document.Show.MouseY.value = mousePos.y;
>
> > }
>
> > function mouseCoords(ev){
> > if(ev.pageX || ev.pageY){
> > return {x:ev.pageX, y:ev.pageY};
> > }
> > return {
> > x:ev.clientX + document.body.scrollLeft -
> > document.body.clientLeft,
> > y:ev.clientY + document.body.scrollTop -
> > document.body.clientTop
> > };}
>
> > //->
>
> > How can I implement this in GWT and assign mousePos.x and mousePos.y
> > to class attributes?
>
> > On 15 jul, 05:15, Carver <[email protected]> wrote:
>
> > > Javascript will only give you a mouse position in response to an
> > > event, AFAIK. Of course, events happen all the time (eg~ the mouse
> > > moving). So you just need to decide which element in GWT is listening
> > > for that event. See all the known objects that have the mouse move
> > > handler
> > > here:http://google-web-toolkit.googlecode.com/svn/javadoc/1.6/com/google/g...
>
> > > GWT has a FocusPanel (ie~ a Panel that captures mouse and keyboard
> > > events), but does not seem to have an equivalent FocusPopupPanel. So
> > > you might want to do something like add a FocusWidget to your
> > > PopupPanel.
>
> > > ~Carver
>
> > > Slique.com - builds group memory by putting all your group's email,
> > > files and documents in one place
> > > I'm trying this out:http://five.sentenc.es/
>
> > > On Jul 14, 9:41 am, Frank <[email protected]> wrote:
>
> > > > Hi,
>
> > > > I'm trying to get the cursor position on a page made with GWT. But I
> > > > can't find any function to do this
>
> > > > How can I get the x,y coordinates of my pointer. (I want to use this
> > > > with a popup window)
>
> > > > Regards,
>
> > > > Frank
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