Solved

Popup Menu

Posted on 2001-06-13
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Last Modified: 2010-04-06
The popup menu automatically closes when the user clicks on another component outside it.  Is there a way to know when this will occur?  Or is there a way to know when the user has clicked the mouse on any other part of the form except the pop up menu?
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Question by:TheBreeze
5 Comments
 
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Expert Comment

by:ITugay
ID: 6190333
listenning.....
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LVL 5

Expert Comment

by:knowlton
ID: 6191316
Every event goes into the Windows Message "queue".  Capture the message and you can control the response to that event.
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by:Gwena
ID: 6192801
listening :-)
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by:TheBreeze
ID: 6193578
KnowIton,

Pardon my ignorance, but how do I actually capture the message?
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Accepted Solution

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Greyman earned 50 total points
ID: 6194063
Looking through the source code (D3) for TPopupMenu and the WIN API - I don't see any messages that can be trapped for this purpose.

However, TrackPopupMenu (the Win API function that displays a popup menu) does have a parameter that you can set that defines a rectangle where clicking does not make the popup menu go away (HTH).

To do that, instead of calling MyPopupMenu.Popup(XPos,YPos), you would need to do this:

var
  MyRect : TRect;
begin
// Set the Left, Right, Top and Bottom parts of MyRect
//to the boundaries of the rectangle where we can click
//without losing the menu

TrackPopupMenu(MyPopupMenu.Handle,TPM_LEFTALIGN or TPM_RIGHTBUTTON, XPos,YPos,0 {reserved}, Ptr(MyRect));

HTH
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