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 "ui_qgscompoundcolorwidget.h"
 
#include "qgis.h"
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgspanelwidget.h"
 
class QgsScreenHelper;

 
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 setColorModelEditable( bool colorModelEditable );

    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 hideEvent( QHideEvent *e ) override;
 
    void mousePressEvent( QMouseEvent *e ) override;
 
    void mouseMoveEvent( QMouseEvent *e ) override;
 
    void mouseReleaseEvent( QMouseEvent *e ) override;
 
    void keyPressEvent( QKeyEvent *e ) override;
 
  private slots:
 
    void onColorButtonGroupToggled( int, 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 );
 
    void mActionShowInButtons_toggled( bool state );

    void _setColor( const QColor &color );
 
  private:
    static QScreen *findScreenAt( QPoint pos );

    void updateComponent();
 
    QgsScreenHelper *mScreenHelper = nullptr;
 
    bool mAllowAlpha = true;
 
    int mLastCustomColorIndex = 0;
 
    bool mPickingColor = false;
 
    bool mDiscarded = false;
 
    QList<QPair<QRadioButton *, QgsColorWidget::ColorComponent>> mRgbRadios;
    QList<QPair<QRadioButton *, QgsColorWidget::ColorComponent>> mCmykRadios;
    QButtonGroup *mCmykGroup = nullptr;
    QButtonGroup *mRgbGroup = nullptr;

    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();
 
    friend class TestQgsCompoundColorWidget;
};
 
#endif // QGSCOMPOUNDCOLORWIDGET_H