TppViewer Problem

rbuser

I making a custom preview form using TppViewer Component, all work fine,
except for TextSearch that i can use in normal report but i don't see in
TppViewer Component any property to active.

Thank's

nicocizik

Hi Nelson,

Instead of creating a form replacement for the preview window, you now need
to create a preview plugin. See the article below for more information...

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Article: Creating a Preview Plugin
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Q: I've followed the tutorials and registered a Preview Form replacement but
that did not affect the TppDesigner's Preview workspace.


A: Do not use the form replacement, but rather, there is a different
architecture built into the preview form that is registered by default.



You will need to register a TppPreview descendent. The class you register
is used to create the preview controls inside the standard print preview
form and the designer preview workspace.


Here is an example of creating a simple custom preview that access the
viewer its been assigned in order to change the page color. You can also do
more advanced operations such as adding and removing buttons and change the
behavior of the preview form. Access the inherited controls via. protected
properties and override the virtual methods in order to customize behavior.

Open ppPreview.pas and view the TppPreview class as a guide to create a
custom preview descendent.


unit MyPreviewPlugin;

interface

uses
ppPreview;

type
TMyPreviewPlugin = class(TppPreview)
public
procedure BeforePreview; override;

end;


implementation

uses
Graphics;


procedure TMyPreviewPlugin.BeforePreview;
begin
inherited BeforePreview;

Viewer.PageColor := clRed;

end;

initialization
TppPreviewPlugIn.Register(TMyPreviewPlugin);

finalization
TppPreviewPlugIn.UnRegister(TMyPreviewPlugin);

end.

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