Shoutbox

Hi,

I would like to detect if the mouse pointer is over a specified control.
Is this possible, and if so, which functions should I use (I guess it has to do with the Windows API?)?

Thanks in advance.

You will need to monitor the window messages other then that there isn't a way.

Okay, that'll do it. Thanks

Well, I guess I was wrong about the 1st sentence of this post..

I've inserted a "OnWindowidEvent_MessageNotification", yet nothing shows up in the debugger..

My code:

code:

---

function OnEvent_Initialize(MessengerStart) {
      WndMain = MsgPlus.CreateWnd("Windows.xml","WndMain",1);
}

function OnWndMainEvent_MessageNotification(PlusWnd,wMessage,wParam,lParam) {
      Debug.Trace("> Got message \"" + wMessage + "\" with wParam \"" + wParam + "\" and lParam \"" + lParam + "\"");
}

---

No, I was right

The problem with this:

quote:

---

Originally posted by SmokingCookie

code:

---

Debug.Trace("> Got message \"" + wMessage + "\" with wParam \"" + wParam + "\" and lParam \"" + lParam + "\"");

---

---

Is that you aren't defining any messages to watch. And your \ should be \\. Check the code below to get an idea:

code:

---

function OnEvent_Initialize(MessengerStart) {
      WndMain = MsgPlus.CreateWnd("Windows.xml","WndMain",1);
      WndMain.RegisterMessageNotification(0x200 /* WM_MOUSEMOVE */)
}

function OnWndMainEvent_MessageNotification(PlusWnd,wMessage,wParam,lParam) {
    switch(nMessage){
        case 0x200 /* WM_MOUSEMOVE */:
            // do stuff here
            break;
    }
}

---

Hi,

Thanks for the advice

Actually my piece of code was more to see if my window would receive any messages at all (it appeared not to receive them, because I did not register them..).

And about the \:

The debugger would say something like this:

code:

---

> Function called: OnWndMainEvent_MessageNotification
> Got message "78" with wParam "10119" and lParam "456204"

---

The \" means that the text to show in the debugger hasn't ended yet, but does contain a quotation mark ( " ).

quote:

---

Originally posted by SmokingCookie
The \" means that the text to show in the debugger hasn't ended yet, but does contain a quotation mark ( " ).

---

Haha!

I wasn't paying attention! By default Plus! wont make your script aware of any events unless you specifically tell it you want to know about them.

It's early over there in Canada, isn't it?

How can I get the xy Positions out of the lParam i get back from the Message?

quote:

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Originally posted by Jana.
How can I get the xy Positions out of the lParam i get back from the Message?

---

For stuff like that it is always a good idea to look things up in the MSDN Library:

=> WM_MOUSEMOVE

quote:

---

x is the low word of the double word lParam variable
y is the high word of the double word lParam variable

---

thus:

    var x = lParam & 0xFFFF
    var y = lParam >>> 16

don't confuse >>> (unsigned right shift operator) with >> (signed right shift operator). See Windows scripting docs for detailed info.




PS: also read "The Old New Thing: Why do I get spurious WM_MOUSEMOVE messages?" if you want to use WM_MOUSEMOVE.


PS: Checking mouse movement over a control with the WM_MOUSEMOVE Windows Message is possible, but does not provide ways to detect if the mouse moved out of the control. For that you need to setup a mouse tracking/capturing message with the Windows API SetCapture.