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Debugging EventHandler()
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From
15/11/2017 06:24:44
 
 
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General information
Forum:
Visual FoxPro
Category:
Object Oriented Programming
Title:
Debugging EventHandler()
Environment versions
Visual FoxPro:
VFP 9 SP2
OS:
Windows 7
Miscellaneous
Thread ID:
01655596
Message ID:
01655596
Views:
69
Hi,

How to know why EventHandler() fails by returning .F.?

Here is a test program:
local oForm, ListImages_Handler

activate screen
clear

oForm = CreateObject('form')
? 'OLEimg:', Iif(oForm.AddObject('OLEimg', 'OLEcontrol', 'MSComctlLib.ImageListCtrl.2'), 'OK', 'KO :(') && OK

ListImages_Handler = CreateObject("ListImages_Handler") && see below
? 'ListImages_Handler:', Iif(Vartype(m.ListImages_Handler) == 'O', 'OK', 'KO :(') && OK

? 'EventHandler():', iif(EventHandler(m.oForm.OLEimg.ListImages, m.ListImages_Handler), 'OK', 'KO :(') && KO -- why?

? 'ListImages.add():', Iif(Vartype(m.oForm.OLEimg.ListImages.add(, Home(1) + 'Graphics\Bitmaps\Gauge\dome.bmp', LoadPicture(Home(1) + 'Graphics\Bitmaps\Gauge\dome.bmp'))) == 'O', 'OK', 'KO :(') && OK

&& Generated by dragging & dropping from object browser: MSComctlLib > Interfaces > Hidden Dispatch Interface IImages
DEFINE CLASS ListImages_Handler AS session OLEpublic

	IMPLEMENTS IImages IN "MSComctlLib.ImageListCtrl.2"

	PROCEDURE IImages_get_ControlDefault(Index AS VARIANT) AS VARIANT
	* add user code here
	ENDPROC

	PROCEDURE IImages_put_ControlDefault(Index AS VARIANT) AS VARIANT
	* add user code here
	ENDPROC

	PROCEDURE IImages_get_Count() AS INTEGER;
 				HELPSTRING "Returns the number of objects in a collection."
	* add user code here
	ENDPROC

	PROCEDURE IImages_put_Count(eValue AS INTEGER @);
 				HELPSTRING "Returns the number of objects in a collection."
	* add user code here
	ENDPROC

	PROCEDURE IImages_get_Item(Index AS VARIANT) AS VARIANT;
 				HELPSTRING "Returns a specific member of a Collection object either by position or by key."
	* add user code here
	ENDPROC

	PROCEDURE IImages_put_Item(Index AS VARIANT, Key AS VARIANT, Picture AS VARIANT) AS VARIANT
	&& 2017-09-19 thn -- {en} added for instantiation to succeed
	ENDPROC

	PROCEDURE IImages_Add(Index AS VARIANT, Key AS VARIANT, Picture AS VARIANT) AS VARIANT;
 				HELPSTRING "Adds a ListImage object to a ListImages collection and returns a reference to the created object."
? 'IImages_Add()', m.key && does not fire
	ENDPROC

	PROCEDURE IImages_Clear() AS VOID;
 				HELPSTRING "Removes all objects in a collection."
	* add user code here
	ENDPROC

	PROCEDURE IImages_Item(Index AS VARIANT) AS VARIANT;
 				HELPSTRING "Returns a specific member of a Collection object either by position or by key."
	* add user code here
	ENDPROC

	PROCEDURE IImages_Remove(Index AS VARIANT) AS VOID;
 				HELPSTRING "Removes a specific member from a collection."
	* add user code here
	ENDPROC

	PROCEDURE IImages__NewEnum() AS VARIANT
	* add user code here
	ENDPROC

enddefine
Thierry Nivelet
FoxinCloud
Give your VFP application a second life, web-based, in YOUR cloud
http://foxincloud.com/
Never explain, never complain (Queen Elizabeth II)
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