forked from openkylin/kolourpaint
145 lines
4.2 KiB
C++
145 lines
4.2 KiB
C++
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef kpTransformPreviewDialog_H
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#define kpTransformPreviewDialog_H
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#include <QDialog>
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class QLabel;
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class QGridLayout;
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class QGroupBox;
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class kpDocument;
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class kpResizeSignallingLabel;
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class kpTransformDialogEnvironment;
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class kpTransformPreviewDialog : public QDialog
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{
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Q_OBJECT
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public:
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enum Features
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{
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Dimensions = 1, Preview = 2,
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AllFeatures = Dimensions | Preview
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};
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// You must call slotUpdate() in your constructor
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kpTransformPreviewDialog (Features features,
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bool reserveTopRow,
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// e.g. "Skew (Image|Selection)"
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const QString &caption,
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// (in the Dimensions Group Box) e.g. "After Skew:"
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const QString &afterActionText,
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bool actOnSelection,
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kpTransformDialogEnvironment *_env,
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QWidget *parent);
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~kpTransformPreviewDialog () override;
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private:
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void createDimensionsGroupBox ();
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void createPreviewGroupBox ();
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public:
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virtual bool isNoOp () const = 0;
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protected:
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kpDocument *document () const;
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QWidget *mainWidget () const;
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// All widgets must have mainWidget() as their parent
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void addCustomWidgetToFront (QWidget *w); // see <reserveTopRow> in ctor
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void addCustomWidget (QWidget *w);
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void addCustomWidgetToBack (QWidget *w)
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{
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addCustomWidget (w);
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}
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virtual QSize newDimensions () const = 0;
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virtual QImage transformPixmap (const QImage &pixmap,
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int targetWidth, int targetHeight) const = 0;
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public:
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// Use to avoid excessive, expensive preview pixmap label recalcuations,
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// during init and widget relayouts.
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//
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// Setting <enable> to true automatically calls slotUpdateWithWaitCursor().
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//
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// WARNING: This overrides a non-virtual method in QWidget.
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void setUpdatesEnabled (bool enable);
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private:
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void updateDimensions ();
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public:
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static double aspectScale (int newWidth, int newHeight,
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int oldWidth, int oldHeight);
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static int scaleDimension (int dimension, double scale, int min, int max);
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private:
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void updateShrunkenDocumentPixmap ();
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protected slots:
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void updatePreview ();
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// Call this whenever a value (e.g. an angle) changes
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// and the Dimensions & Preview need to be updated
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virtual void slotUpdate ();
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virtual void slotUpdateWithWaitCursor ();
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protected:
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// REFACTOR: Use d-ptr
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QString m_afterActionText;
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bool m_actOnSelection;
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int m_oldWidth, m_oldHeight;
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QWidget *m_mainWidget;
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QGroupBox *m_dimensionsGroupBox;
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QLabel *m_afterTransformDimensionsLabel;
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QGroupBox *m_previewGroupBox;
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kpResizeSignallingLabel *m_previewPixmapLabel;
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QSize m_previewPixmapLabelSizeWhenUpdatedPixmap;
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QImage m_shrunkenDocumentPixmap;
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QGridLayout *m_gridLayout;
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int m_gridNumRows;
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kpTransformDialogEnvironment *m_environ;
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};
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#endif // kpTransformPreviewDialog_H
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