class KPreviewWidgetBase

# class KPreviewWidgetBase | Abstract baseclass for all preview widgets. More...
Contains pure virtuals
Definition | `#include <kpreviewwidgetbase.h>`
Inherits | QWidget (qt) [public ]
Inherited by | KImageFilePreview
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#### Public Methods

- KPreviewWidgetBase (QWidget *parent, const char *name=0)

#### Public Slots

- virtual void showPreview (const KURL &url)
- virtual void clearPreview ()

#### Protected Methods

- virtual void virtual_hook ( int, void* )

## Detailed Description

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

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

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

void showPreview (const KURL &url) | ### showPreview

[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.

void clearPreview () | ### 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.

void virtual_hook ( int, void* ) | ### virtual_hook

[protected virtual]

- Author: Frerich Raabe
- Generated: root on macppc.ports.openbsd.org on Sat Sep 6 10:37:17 2003, using kdoc 2.0a54.