D3 to D6

rbuser

Still struggling to move a large project of D3 to D6. Your old
PrintPreview dialog had a bunch of buttons on it. And your tech tips
describe making your own and registering. But the new form is mostly
just a blank form. Was wondering if there was another form/unit I
should be looking at instead that was similar to the old version.
Thanks.

digitalmetaphors

You should copy the old implementation of hte preview form and use that to
replace the form instead of descending from it. The alternative is to use
the new architecture to create a preview plugin in which you can descend
from TppPreview and modify the preview that way. I can email you an example
of replacing the preview using the new architecture if you would like.


Cheers,

Jim Bennett
Digital Metaphors

rbuser

What I was thinking of doing instead was assigning code to the (new)
PreviewForm onclosequery event during the onCreatePreviewForm event of
the Report. Sound ok? I just want to provide a means to ask a
question and abort the closing of the preview form for a particular
report.

digitalmetaphors

Add the following unit to your project if you want to respond to the
pressing of the close button in your own way:

unit myPreviewPlugin;

interface

uses
ppPreview;

type

{TppMyPreview}

TppMyPreview = class(TppPreview)
private
procedure MyStuff;

public
procedure PerformPreviewAction(aPreviewAction: TppPreviewActionType);
override;

end; {class, TppMyPreview}

implementation

uses
ppTypes;

procedure TppMyPreview.PerformPreviewAction(aPreviewAction:
TppPreviewActionType);
begin

if (aPreviewAction = paClose) or (aPreviewAction = paCancel)then
MyStuff

else
inherited PerformPreviewAction(aPreviewAction);

end; {procedure, PerformPreviewAction}

procedure TppMyPreview.MyStuff;
begin
{do your code}
end;

initialization
TppPreviewPlugin.UnRegister(TppPreview);
TppPreviewPlugIn.Register(TppMyPreview);

finalization
TppPreviewPlugIn.UnRegister(TppMyPreview);
TppPreviewPlugIn.Register(TppPreview);


end.

Cheers,

Jim Bennett
Digital Metaphors

rbuser

Thanks!

rbuser

Assuming I want different (or no code) in PerformPreviewAction
depending on which report is running, I was wondering what was the
recommended technique? Thanks.

digitalmetaphors

When you load a report template, you can register a specific preview class
if you want at that time. You don't have to place the registration calls to
unregister.register in the initialization/finalization sections.


Cheers,

Jim Bennett
Digital Metaphors