qgscolorrampshaderwidget.h

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/***************************************************************************
                         qgscolorrampshaderwidget.h
                         --------------------------
    begin                : Jun 2018
    copyright            : (C) 2018 by Peter Petrik
    email                : zilolv 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 QGSCOLORRAMPSHADERWIDGET_H
#define QGSCOLORRAMPSHADERWIDGET_H

#include "qgis_sip.h"
#include "qgscolorrampshader.h"
#include "qgsrasterrenderer.h"
#include "qgscolorschemelist.h"
#include "ui_qgscolorrampshaderwidgetbase.h"
#include "qgis_gui.h"
#include "qgsrasterrendererwidget.h"

class QgsRasterDataProvider;

class GUI_EXPORT QgsColorRampShaderWidget: public QWidget, protected Ui::QgsColorRampShaderWidgetBase
{

    Q_OBJECT

  public:

    QgsColorRampShaderWidget( QWidget *parent = nullptr );

    void initializeForUseWithRasterLayer();

    void setRasterDataProvider( QgsRasterDataProvider *dp );

    void setRasterBand( int band );

    void setExtent( const QgsRectangle &extent );

    void setMinimumMaximumAndClassify( double minimum, double maximum );

    void setMinimumMaximum( double minimum, double maximum );

    double minimum() const;

    double maximum() const;

    QgsColorRampShader shader() const;

    void setFromShader( const QgsColorRampShader &colorRampShader );

  signals:
    void minimumMaximumChangedFromTree( double minimum, double maximum );

    void widgetChanged();

    void classificationModeChanged( QgsColorRampShader::ClassificationMode mode );

  public slots:

    void classify();

    void loadMinimumMaximumFromTree();

  protected:
    void populateColormapTreeWidget( const QList<QgsColorRampShader::ColorRampItem> &colorRampItems );

  private:

    enum Column
    {
      ValueColumn = 0,
      ColorColumn = 1,
      LabelColumn = 2,
    };

    void autoLabel();

    void setUnitFromLabels();

    QMenu *contextMenu = nullptr;

  private slots:

    void applyColorRamp();
    void mAddEntryButton_clicked();
    void mDeleteEntryButton_clicked();
    void mLoadFromBandButton_clicked();
    void mLoadFromFileButton_clicked();
    void mExportToFileButton_clicked();
    void mUnitLineEdit_textEdited( const QString &text ) { Q_UNUSED( text ); autoLabel(); }
    void mColormapTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
    void mColormapTreeWidget_itemEdited( QTreeWidgetItem *item, int column );
    void mColorInterpolationComboBox_currentIndexChanged( int index );
    void mClassificationModeComboBox_currentIndexChanged( int index );
    void changeColor();
    void changeOpacity();

  private:
    void setLineEditValue( QLineEdit *lineEdit, double value );
    double lineEditValue( const QLineEdit *lineEdit ) const;
    void resetClassifyButton();

    QgsColorSwatchDelegate *mSwatchDelegate = nullptr;

    double mMin = std::numeric_limits<double>::quiet_NaN();
    double mMax = std::numeric_limits<double>::quiet_NaN();

    // For mode with raster layer
    QgsRasterDataProvider *mRasterDataProvider = nullptr;
    int mBand = -1;
    QgsRectangle mExtent;

};

#endif // QGSCOLORRAMPSHADERWIDGET_H