qgscompoundcolorwidget.h

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/***************************************************************************
    qgscompoundcolorwidget.h
    ------------------------
    begin                : April 2016
    copyright            : (C) 2016 by Nyall Dawson
    email                : nyall dot dawson 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 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSCOMPOUNDCOLORWIDGET_H
#define QGSCOMPOUNDCOLORWIDGET_H

#include "qgsguiutils.h"
#include "qgis_sip.h"
#include "qgspanelwidget.h"
#include "ui_qgscompoundcolorwidget.h"
#include "qgis_gui.h"

class GUI_EXPORT QgsCompoundColorWidget : public QgsPanelWidget, private Ui::QgsCompoundColorWidgetBase
{

    Q_OBJECT

  public:

    enum Layout
    {
      LayoutDefault = 0, 
      LayoutVertical, 
    };

    QgsCompoundColorWidget( QWidget *parent SIP_TRANSFERTHIS = nullptr, const QColor &color = QColor(), Layout layout = LayoutDefault );

    ~QgsCompoundColorWidget() override;

    QColor color() const;

    void setAllowOpacity( bool allowOpacity );

    void setDiscarded( bool discarded ) { mDiscarded = discarded; }

    static QgsUserColorScheme *importUserPaletteFromFile( QWidget *parent );

    static QgsUserColorScheme *createNewUserPalette( QWidget *parent );

    static bool removeUserPalette( QgsUserColorScheme *scheme, QWidget *parent );

  signals:

    void currentColorChanged( const QColor &color );

  public slots:

    void setColor( const QColor &color );

    void setPreviousColor( const QColor &color );

  protected:

    void mousePressEvent( QMouseEvent *e ) override;

    void mouseMoveEvent( QMouseEvent *e ) override;

    void mouseReleaseEvent( QMouseEvent *e ) override;

    void keyPressEvent( QKeyEvent *e ) override;

  private slots:

    void mHueRadio_toggled( bool checked );
    void mSaturationRadio_toggled( bool checked );
    void mValueRadio_toggled( bool checked );
    void mRedRadio_toggled( bool checked );
    void mGreenRadio_toggled( bool checked );
    void mBlueRadio_toggled( bool checked );

    void mAddColorToSchemeButton_clicked();

    void importPalette();
    void removePalette();
    void newPalette();

    void schemeIndexChanged( int index );
    void listSelectionChanged( const QItemSelection &selected, const QItemSelection &deselected );

    void mAddCustomColorButton_clicked();

    void mSampleButton_clicked();
    void mTabWidget_currentChanged( int index );

  private slots:

    void mActionShowInButtons_toggled( bool state );

  private:

    static QScreen *findScreenAt( QPoint pos );

    bool mAllowAlpha = true;

    int mLastCustomColorIndex = 0;

    bool mPickingColor = false;

    bool mDiscarded = false;

    void saveSettings();

    void stopPicking( QPoint eventPos, bool takeSample = true );

    QColor averageColor( const QImage &image ) const;

    QColor sampleColor( QPoint point ) const;

    void refreshSchemeComboBox();

    static QString gplFilePath();

    void updateActionsForCurrentScheme();
};

#endif // QGSCOMPOUNDCOLORWIDGET_H