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diff --git a/kolourpaint/tools/kptoolpreviewdialog.h b/kolourpaint/tools/kptoolpreviewdialog.h
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+++ b/kolourpaint/tools/kptoolpreviewdialog.h
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+
+/*
+   Copyright (c) 2003,2004,2005 Clarence Dang <[email protected]>
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+   THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef __kp_tool_preview_dialog_h__
+#define __kp_tool_preview_dialog_h__
+
+
+#include <qpixmap.h>
+
+#include <kdialogbase.h>
+
+
+class QLabel;
+class QGridLayout;
+class QGroupBox;
+
+class kpDocument;
+class kpMainWindow;
+class kpResizeSignallingLabel;
+
+
+class kpToolPreviewDialog : public KDialogBase
+{
+Q_OBJECT
+
+public:
+    enum Features
+    {
+        Dimensions = 1, Preview = 2,
+        AllFeatures = Dimensions | Preview
+    };
+
+    // You must call slotUpdate() in your constructor
+    kpToolPreviewDialog (Features features,
+                         bool reserveTopRow,
+                         // e.g. "Skew (Image|Selection)"
+                         const QString &caption,
+                         // (in the Dimensions Group Box) e.g. "After Skew:"
+                         const QString &afterActionText,
+                         bool actOnSelection,
+                         kpMainWindow *parent,
+                         const char *name = 0);
+    virtual ~kpToolPreviewDialog ();
+
+private:
+    void createDimensionsGroupBox ();
+    void createPreviewGroupBox ();
+
+public:
+    virtual bool isNoOp () const = 0;
+
+protected:
+    kpDocument *document () const;
+
+    // All widgets must have mainWidget() as their parent
+    void addCustomWidgetToFront (QWidget *w);  // see <reserveTopRow> in ctor
+    void addCustomWidget (QWidget *w);
+    void addCustomWidgetToBack (QWidget *w)
+    {
+        addCustomWidget (w);
+    }
+
+    virtual QSize newDimensions () const = 0;
+    virtual QPixmap transformPixmap (const QPixmap &pixmap,
+                                     int targetWidth, int targetHeight) const = 0;
+
+private:
+    void updateDimensions ();
+
+public:
+    static double aspectScale (int newWidth, int newHeight,
+                               int oldWidth, int oldHeight);
+    static int scaleDimension (int dimension, double scale, int min, int max);
+
+private:
+    void updateShrukenDocumentPixmap ();
+
+protected slots:
+    void updatePreview ();
+
+    // Call this whenever a value (e.g. an angle) changes
+    // and the Dimensions & Preview need to be updated
+    virtual void slotUpdate ();
+
+    virtual void slotUpdateWithWaitCursor ();
+
+protected:
+    QString m_afterActionText;
+    bool m_actOnSelection;
+    kpMainWindow *m_mainWindow;
+
+    int m_oldWidth, m_oldHeight;
+
+    QGroupBox *m_dimensionsGroupBox;
+    QLabel *m_afterTransformDimensionsLabel;
+
+    QGroupBox *m_previewGroupBox;
+    kpResizeSignallingLabel *m_previewPixmapLabel;
+    QSize m_previewPixmapLabelSizeWhenUpdatedPixmap;
+    QPixmap m_shrunkenDocumentPixmap;
+
+    QGridLayout *m_gridLayout;
+    int m_gridNumRows;
+};
+
+
+#endif  // __kp_tool_preview_dialog_h__