paniconwidget.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2004-08-22
 * Description : a generic widget to display a panel to choose
 *               a rectangular image area.
 *
 * Copyright (C) 1997      by Tim D. Gilman (tdgilman at best dot org)
 * Copyright (C) 1998-2001 by Mirko Boehm (mirko at kde dot org)
 * Copyright (C) 2007      by John Layt <john at layt dot net>
 * Copyright (C) 2004-2022 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_PAN_ICON_WIDGET_H
#define DIGIKAM_PAN_ICON_WIDGET_H
 
// Qt includes
 
#include <QWidget>
#include <QRect>
#include <QImage>
#include <QPixmap>
#include <QHideEvent>
#include <QMouseEvent>
#include <QTimerEvent>
#include <QPaintEvent>
#include <QFrame>
 
// Local includes
 
#include "digikam_export.h"
#include "dimg.h"
 
class QToolButton;
 
namespace Digikam
{
 
class DIGIKAM_EXPORT PanIconFrame : public QFrame
{
    Q_OBJECT
 
public:
 
    explicit PanIconFrame(QWidget* const parent = nullptr);
    ~PanIconFrame() override;
 
    void setMainWidget(QWidget* const main);
 
    void popup(const QPoint& pos);
 
    int exec(const QPoint& pos);
 
    int exec(int x, int y);
 
    void resizeEvent(QResizeEvent* resize)  override;
 
Q_SIGNALS:
 
    void leaveModality();
 
protected:
 
    void keyPressEvent(QKeyEvent* e)        override;
 
public Q_SLOTS:
 
    void close(int r);
 
private:
 
    class Private;
    friend class Private;
    Private* const d;
 
    Q_DISABLE_COPY(PanIconFrame)
};
 
// ---------------------------------------------------------------------------------
 
class DIGIKAM_EXPORT PanIconWidget : public QWidget
{
    Q_OBJECT
 
public:
 
    explicit PanIconWidget(QWidget* const parent = nullptr);
    ~PanIconWidget()                        override;
 
    static QToolButton* button();
 
    void setImage(int previewWidth, int previewHeight, const QImage& fullOriginalImage);
    void setImage(int previewWidth, int previewHeight, const DImg& fullOriginalImage);
    void setImage(const QImage& scaledPreviewImage, const QSize& fullImageSize);
 
    void  setRegionSelection(const QRect& regionSelection);
    QRect getRegionSelection() const;
    void  setCenterSelection();
 
    void  setCursorToLocalRegionSelectionCenter();
    void  setMouseFocus();
 
Q_SIGNALS:
 
    void signalSelectionMoved(const QRect& rect, bool targetDone);
 
    void signalSelectionTakeFocus();
 
    void signalHidden();
 
public Q_SLOTS:
 
    void slotZoomFactorChanged(double);
 
protected:
 
    void showEvent(QShowEvent*)             override;
    void hideEvent(QHideEvent*)             override;
    void paintEvent(QPaintEvent*)           override;
    void mousePressEvent(QMouseEvent*)      override;
    void mouseReleaseEvent(QMouseEvent*)    override;
    void mouseMoveEvent(QMouseEvent*)       override;
 
    void regionSelectionMoved(bool targetDone);
 
protected Q_SLOTS:
 
    void slotFlickerTimer();
 
private:
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_PAN_ICON_WIDGET_H