qgslegendpatchshapebutton.h

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/***************************************************************************
     qgslegendpatchshapebutton.h
     -----------------
    Date                 : April 2020
    Copyright            : (C) 2020 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 QGSLEGENDPATCHSHAPEBUTTON_H
#define QGSLEGENDPATCHSHAPEBUTTON_H
 
#include <memory>
 
#include "qgis_gui.h"
#include "qgis_sip.h"
#include "qgslegendpatchshape.h"
 
#include <QPointer>
#include <QToolButton>
 
class QgsPanelWidget;
class QgsMessageBar;
class QgsSymbol;

class GUI_EXPORT QgsLegendPatchShapeButton : public QToolButton
{
    Q_OBJECT
 
  public:

    QgsLegendPatchShapeButton( QWidget *parent SIP_TRANSFERTHIS = nullptr, const QString &dialogTitle = QString() );
    ~QgsLegendPatchShapeButton() override;
 
    QSize minimumSizeHint() const override;
    QSize sizeHint() const override;

    void setSymbolType( Qgis::SymbolType type );

    Qgis::SymbolType symbolType() const { return mType; }

    void setPreviewSymbol( QgsSymbol *symbol SIP_TRANSFER );

    void setDialogTitle( const QString &title );

    QString dialogTitle() const;

    QgsLegendPatchShape shape();

    void setMessageBar( QgsMessageBar *bar );

    QgsMessageBar *messageBar() const;
 
  public slots:

    void setShape( const QgsLegendPatchShape &shape );

    void setToDefault();
 
  signals:

    void changed();
 
  protected:
    void changeEvent( QEvent *e ) override;
    void showEvent( QShowEvent *e ) override;
    void resizeEvent( QResizeEvent *event ) override;
 
    // Reimplemented to detect right mouse button clicks on the button
    void mousePressEvent( QMouseEvent *e ) override;
 
  private slots:
 
    void showSettingsDialog();

    void prepareMenu();
 
    void loadPatchFromStyle( const QString &name );
 
  private:
    QgsLegendPatchShape mShape;
 
    QSize mSizeHint;
 
    QString mDialogTitle;
 
    Qgis::SymbolType mType = Qgis::SymbolType::Fill;
 
    std::unique_ptr<QgsSymbol> mPreviewSymbol;
 
    QgsMessageBar *mMessageBar = nullptr;
 
    QMenu *mMenu = nullptr;
 
    QSize mIconSize;
 
    bool mIsDefault = true;

    void updatePreview();
};
 
#endif // QGSLEGENDPATCHSHAPEBUTTON_H