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Q136328: How to Determine the Coordinates of an Object

Article: Q136328
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0
Operating System(s): 
Keyword(s): 
Last Modified: 15-FEB-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 3.0 
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SUMMARY
=======

This article shows by example how to determine the coordinates of an object on a
form in Visual FoxPro. This could be useful when you want to position the mouse
pointer over an object programmatically, and then fire that object's Click
event.

MORE INFORMATION
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Step-by-Step Example
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You can use the Top, Left, Height, and Width properties to determine the exact
area occupied by an object. Then position the mouse pointer in that area, and
fire the object's Click event. The following procedure gives an example.

1. Create a new form.

2. Place a command button (Command1) on the form.

3. Place the following five lines of code in the Debug window:

     _SCREEN.ActiveForm.Command1.Top
     _SCREEN.ActiveForm.Command1.Left
     _SCREEN.ActiveForm.Command1.Height
     _SCREEN.ActiveForm.Command1.Width
     _SCREEN.ActiveForm.Command1.ScaleMode

  These commands return numeric values indicating the coordinates of the
  Command1 button relative to the form on which it is located. The Top property
  indicates the distance between the top edge of the control and the top edge
  of its parent object. (For form objects, Top give the distance between the
  top edge of the form and the main Visual FoxPro window.)

  The Left property indicates the left-most edge of an object relative to its
  parent object. (For form objects, Left gives the distance between the left
  edge of the form and the main Visual FoxPro window.)

  The Height property indicates the height of the object on the screen.

  The Width property indicates the width of the object.

  The ScaleMode property indicates the unit of measurement for coordinates of an
  object when using graphics methods or when positioning controls. The two
  measurements Visual FoxPro uses are pixels and foxels. The ScaleMode property
  uses foxels if set to 0 and pixels if set to 3.

4. Run the form, and make a note of the values returned in the Debug window.
  Knowing what these values represent, you can simulate clicking the Command1
  button on this form by using this code:

     tRow = _screen.activeform.command1.top
     tCol = _screen.activeform.command1.left
     MOUSE CLICK AT tRow, tCol PIXELS WINDOW (_SCREEN.ACTIVEFORM.Name)

NOTE: This code fires the Command1 Click event. For more information on the
syntax of the MOUSE CLICK command, please see the MOUSE Command topic in the
Help file.

Additional query words: VFoxWin

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Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP300
Version           : WINDOWS:3.0

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