# kio Library API Documentation

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# KPreviewWidgetBase Class Reference

Abstract baseclass for all preview widgets which shall be used via KFileDialog::setPreviewWidget(const KPreviewWidgetBase *). Abstract baseclass for all preview widgets. More...

`#include <kpreviewwidgetbase.h>`

Inheritance diagram for KPreviewWidgetBase:

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Collaboration diagram for KPreviewWidgetBase:

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List of all members.

## Public Slots

virtual void | showPreview (const KURL &url)=0
| This slot is called everytime the user selects another file in the file dialog.
virtual void | clearPreview ()=0
| Reimplement this to clear the preview.

## Public Member Functions

| KPreviewWidgetBase (QWidget *parent, const char *name=0)
| Constructor.

## Protected Member Functions

virtual void | virtual_hook (int, void *)

## Detailed Description

Abstract baseclass for all preview widgets which shall be used via KFileDialog::setPreviewWidget(const KPreviewWidgetBase *). Abstract baseclass for all preview widgets.

Ownership will be transferred to KFileDialog, so you have to create the preview with "new" and let KFileDialog delete it.

Just derive your custom preview widget from KPreviewWidgetBase and implement all the pure virtual methods. The slot showPreview(const KURL &) is called every time the file selection changes.

Author:
  Frerich Raabe <raabe@kde.org>

Definition at line 41 of file kpreviewwidgetbase.h.

## Constructor & Destructor Documentation

KPreviewWidgetBase::KPreviewWidgetBase | ( | QWidget * | parent,
|  | const char * | name = 0
| ) | `[inline]`

Constructor.

Construct the user interface of your preview widget here and pass the KFileDialog this preview widget is going to be used in as the parent.

Parameters:

  parent | The KFileDialog this preview widget is going to be used in

Definition at line 53 of file kpreviewwidgetbase.h.

References KStdAccel::name().

## Member Function Documentation

virtual void KPreviewWidgetBase::showPreview | ( | const KURL & | url | ) | `[pure virtual, slot]`

This slot is called everytime the user selects another file in the file dialog.

Implement the stuff necessary to reflect the change here.

Parameters:

  url | The URL of the currently selected file.

Implemented in KImageFilePreview.

virtual void KPreviewWidgetBase::clearPreview | ( |  | ) | `[pure virtual, slot]`

| Reimplement this to clear the preview. This is called when e.g. the selection is cleared or when multiple selections exist, or the directory is changed. Implemented in KImageFilePreview.

The documentation for this class was generated from the following file:

- kpreviewwidgetbase.h

This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
Generated on Wed Jan 28 13:19:41 2004 by doxygen 1.3.4 written by Dimitri van Heesch, © 1997-2001