*----------- START CODE**-----------------------------------* AUTHOR: Trevor Hancock* CREATED: 02/24/05 02:47:08 PM* ABSTRACT:* Shows how to disable printing from* PREVIEW when you use object-assisted* reporting in VFP9.** Also includes a workaround for problem* where the PREVIEW toolbar does not* recognize the TextOnToolbar or* PrintFromPreview settings between* toolbar displays during same preview.*-----------------------------------*-- Defines whether to alllow for*-- printing during preview. Used to set*-- the "AllowPrintfromPreview" property*-- of the object-assisted preview container*-- later in this code.#DEFINE PrintFromPreview .T.LOCAL loPreviewContainer AS FORM, ; loReportListener AS REPORTLISTENER, ; loExHandler AS ExtensionHandler OF SYS(16)*-- Get a preview container from the*-- .APP registered to handle object-assisted*-- report previewing.loPreviewContainer = NULLDO (_REPORTPREVIEW) WITH loPreviewContainer*-- Create a PREVIEW listenerloReportListener = NEWOBJECT('ReportListener')loReportListener.LISTENERTYPE = 1 &&Preview*-- Link the Listener and preview containerloReportListener.PREVIEWCONTAINER = loPreviewContainer*-- Changing this property prevents printing from the Preview toolbar*-- and from right-clicking on the preview container, and then clicking "print".*-- This property is not in the VFP9 documentation at this point.loPreviewContainer.AllowPrintfromPreview = PrintFromPreview*-- Controls appearance of text on some of the*-- Preview toolbar buttons. .F. is the default.*-- Included here just to show that it is an available option.loPreviewContainer.TextOnToolbar = .F.*-- Create an extension handler and hook it to the*-- preview container. This will let you manipulate*-- properties of the container and its Preview toolbarloExHandler = NEWOBJECT('ExtensionHandler')loPreviewContainer.SetExtensionHandler( loExHandler )REPORT FORM ; HOME() + 'Samples\Solution\Reports\colors.frx' ; OBJECT loReportListenerRELEASE loPreviewContainer, loReportListener, loExHandler*-------------------------*-------------------------DEFINE CLASS ExtensionHandler AS CUSTOM *-- Ref to the Preview Container's Preview Form PreviewForm = NULL *-- Here you implement (hook into) the PreviewForm_Assign *-- event of the preview container's parent proxy PROCEDURE PreviewForm_Assign( loRef ) *-- Perform default behavior: assign obj ref. THIS.PreviewForm = loRef *-- Grab the obj ref to the preview form and bind to its *-- ShowToolbar() method. This lets the *-- STB_Handler() method of this extension handler *-- to run code whenever the Preview toolbar is shown *-- by the PreviewForm.ShowToolbar() method. IF !ISNULL( loRef ) BINDEVENT(THIS.PreviewForm, ; 'ShowToolbar', THIS, 'STB_Handler') ENDIF ENDPROC PROCEDURE STB_Handler(lEnabled) *-- Here you work around the setting *-- persistence problem in the Preview toolbar. *-- The Preview toolbar class (frxpreviewtoolbar) *-- already has code that you can use to enforce *-- setting's persistence; it is just not called. Here, *-- you call it. WITH THIS.PreviewForm.TOOLBAR .REFRESH() *-- When you call frxpreviewtoolbar::REFRESH(), the *-- toolbar caption is set to its Preview form, *-- which differs from typical behavior. You must revert that *-- to be consistent. If you did not do this, *-- you would see " - Page 2" appended to the toolbar *-- caption if you skipped pages. .CAPTION = THIS.PreviewForm.formCaption ENDWITH ENDPROC *-- A preview container requires these methods *-- to be implemented in an associated preview extension handler. *-- They are not used in this example, but still must be here.PROCEDURE AddBarsToMenu( cPopup, iNextBar ) PROCEDURE SHOW( iStyle ) ENDPROC PROCEDURE HandledKeyPress( nKeyCode, nShiftAltCtrl ) RETURN .F. ENDPROC PROCEDURE PAINT ENDPROC PROCEDURE RELEASE RETURN .T. ENDPROC ENDDEFINE***----------- END CODE#DEFINE PrintFromPreview .T.
#DEFINE PrintFromPreview .F.
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