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Q318461: FIX: Grid Events Are Not Called if Grid Contains No Records

Article: Q318461
Product(s): Microsoft FoxPro
Version(s): 7.0
Operating System(s): 
Keyword(s): kbContainer kbCtrl kbGrpDSFox kbDSupport kbCodeSnippet kbvfp700 _IK283 kbVFP700sp1fix
Last Modified: 10-APR-2002

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 7.0 
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SYMPTOMS
========

When you execute code on a form from the Click, the RightMouse, the MouseUp, and
the MouseDown events in an empty grid, the code in these events is not called.

CAUSE
=====

When the grid is empty, the code in these events is not called. If the grid has
at least one record, the events fire properly.

RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Visual FoxPro for
Windows version 7.0. For additional information, please see the following
article in the Microsoft Knowledge Base:

  Q316964 How to Obtain the Latest Visual FoxPro for Windows 7.0 Service Pack

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Visual FoxPro for
Windows 7.0.

This problem was first corrected in Visual FoxPro for Windows 7.0 Service Pack 1.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Paste the following code in a program (.prg) file named Test, and then run
  the program from the Command window:

  PUBLIC ox
  CREATE CURSOR Test (f1 c(5), f2 c(10))
  **INSERT INTO Test VALUES ('xxx','yyy')
  ox = CREATEOBJECT('form')
  ox.ADDOBJECT('grd1','grd')
  ox.grd1.RECORDSOURCE = 'Test'
  ox.grd1.VISIBLE = .T.
  ox.SHOW

  DEFINE CLASS grd AS GRID

  	COLUMNCOUNT = 0

  	ADD OBJECT col1 AS COL

  	ADD OBJECT col2 AS COL

  	PROCEDURE RIGHTCLICK
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC

  	PROCEDURE CLICK
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC

  	PROCEDURE MOUSEUP
  	LPARAMETERS nButton, nShift, nXCoord, nYCoord
  	WAIT WINDOW  PROGRAM() TIMEOUT 1
      ENDPROC

  	PROCEDURE MOUSEDOWN
  	LPARAMETERS nButton, nShift, nXCoord, nYCoord
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC

  ENDDEFINE

  DEFINE CLASS COL AS COLUMN

  	ADD OBJECT hdr1 AS HEADER

  	PROCEDURE hdr1.CLICK
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC
  	PROCEDURE hdr1.RIGHTCLICK
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC
      PROCEDURE MOUSEUP
  	LPARAMETERS nButton, nShift, nXCoord, nYCoord
  	WAIT WINDOW  PROGRAM() TIMEOUT 1
      ENDPROC

  	PROCEDURE MOUSEDOWN
  	LPARAMETERS nButton, nShift, nXCoord, nYCoord
  	WAIT WINDOW PROGRAM() TIMEOUT 1
      ENDPROC

  ENDDEFINE

2. Right-click within the grid. Note that the Click, the RightMouse, the
  MouseUp, and the MouseDown events do not fire when the grid is empty.

3. Right-click on the grid header. Note that the Click, the RightMouse, the
  MouseUp, and the MouseDown events for the column also do not fire when the
  grid is empty.

4. To resolve this problem, open Test.prg, uncomment the following line of code,
  and then repeat steps 2 and 3:

  INSERT INTO Test VALUES ('xxx','yyy')

5. Repeat Steps 2 and 3, and observe that the events fire.

Additional query words:

======================================================================
Keywords          : kbContainer kbCtrl kbGrpDSFox kbDSupport kbCodeSnippet kbvfp700 _IK283 kbVFP700sp1fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP700
Version           : :7.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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