qgssymbolselectordialog.h

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/***************************************************************************
    qgssymbolselectordialog.h
    ---------------------
    begin                : November 2009
    copyright            : (C) 2009 by Martin Dobias
    email                : wonder dot sk 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 QGSSYMBOLSELECTORDIALOG_H
#define QGSSYMBOLSELECTORDIALOG_H

#include <QDialog>
#include "qgis_sip.h"

#include "ui_qgssymbolselectordialogbase.h"

#include "qgspanelwidget.h"
#include "qgssymbolwidgetcontext.h"
#include "qgsproperty.h"
#include "qgshelp.h"

#include <QStandardItemModel>
#include <QDialogButtonBox>
#include "qgis_gui.h"

class QgsStyle;
class QgsSymbol;
class QgsSymbolLayer;
class QgsVectorLayer;

class QMenu;
class QWidget;

class SymbolLayerItem;
class QgsMarkerSymbol;
class QgsLineSymbol;
class QgsMarkerSymbolLayer;
class QgsLineSymbolLayer;

class QgsMapCanvas;

#ifndef SIP_RUN

class DataDefinedRestorer: public QObject
{
    Q_OBJECT
  public:
    DataDefinedRestorer( QgsSymbol *symbol, const QgsSymbolLayer *symbolLayer );

  public slots:
    void restore();

  private:
    QgsMarkerSymbol *mMarker = nullptr;
    const QgsMarkerSymbolLayer *mMarkerSymbolLayer = nullptr;
    double mSize;
    double mAngle;
    QPointF mMarkerOffset;
    QgsProperty mDDSize;
    QgsProperty mDDAngle;

    QgsLineSymbol *mLine = nullptr;
    const QgsLineSymbolLayer *mLineSymbolLayer = nullptr;
    double mWidth;
    double mLineOffset;
    QgsProperty mDDWidth;

    void save();
};
#endif

class QgsSymbolSelectorDialog;

class GUI_EXPORT QgsSymbolSelectorWidget: public QgsPanelWidget, private Ui::QgsSymbolSelectorDialogBase
{
    Q_OBJECT
    friend class QgsSymbolSelectorDialog;

  public:

    // TODO QGIS 4.0 - transfer ownership of symbol to widget!

    QgsSymbolSelectorWidget( QgsSymbol *symbol, QgsStyle *style, QgsVectorLayer *vl, QWidget *parent SIP_TRANSFERTHIS = nullptr );

    QMenu *advancedMenu();

    void setContext( const QgsSymbolWidgetContext &context );

    QgsSymbolWidgetContext context() const;

    QgsSymbol *symbol() { return mSymbol; }

  protected:

    void loadSymbol();

    void loadSymbol( QgsSymbol *symbol, SymbolLayerItem *parent ) SIP_SKIP;

    void updateUi();

    void updateLockButton();

    SymbolLayerItem *currentLayerItem() SIP_SKIP;

    QgsSymbolLayer *currentLayer();

    void moveLayerByOffset( int offset );

    void setWidget( QWidget *widget );

  signals:

    void symbolModified();

  public slots:

    void moveLayerDown();

    void moveLayerUp();

    void addLayer();

    void removeLayer();

    void lockLayer();

    void duplicateLayer();

    void layerChanged();

    void updateLayerPreview();

    void updatePreview();

    void symbolChanged();

    void changeLayer( QgsSymbolLayer *layer );


  protected: // data
    QgsStyle *mStyle = nullptr;
    QgsSymbol *mSymbol = nullptr;
    QMenu *mAdvancedMenu = nullptr;
    QgsVectorLayer *mVectorLayer = nullptr;

    QStandardItemModel *model = nullptr;
    QWidget *mPresentWidget = nullptr;

  private:
    std::unique_ptr<DataDefinedRestorer> mDataDefineRestorer;
    QgsSymbolWidgetContext mContext;
    QgsFeature mPreviewFeature;
    QgsExpressionContext mPreviewExpressionContext;
    bool mBlockModified = false;

};

class GUI_EXPORT QgsSymbolSelectorDialog : public QDialog
{
    Q_OBJECT

  public:

    QgsSymbolSelectorDialog( QgsSymbol *symbol, QgsStyle *style, QgsVectorLayer *vl, QWidget *parent SIP_TRANSFERTHIS = nullptr, bool embedded = false );
    ~QgsSymbolSelectorDialog() override;

    QMenu *advancedMenu();

    void setContext( const QgsSymbolWidgetContext &context );

    QgsSymbolWidgetContext context() const;

    QgsSymbol *symbol();

  protected:
    // Reimplements dialog keyPress event so we can ignore it
    void keyPressEvent( QKeyEvent *e ) override;

    void loadSymbol();

    void loadSymbol( QgsSymbol *symbol, SymbolLayerItem *parent ) SIP_SKIP;

    void updateUi();

    void updateLockButton();

    SymbolLayerItem *currentLayerItem() SIP_SKIP;
    QgsSymbolLayer *currentLayer();

    void moveLayerByOffset( int offset );

    void setWidget( QWidget *widget );

  signals:
    void symbolModified();

  public slots:
    void moveLayerDown();
    void moveLayerUp();

    void addLayer();
    void removeLayer();

    void lockLayer();

    void duplicateLayer();

    void layerChanged();

    void updateLayerPreview();
    void updatePreview();

    void symbolChanged();

    void changeLayer( QgsSymbolLayer *layer );

  private:
    QgsSymbolSelectorWidget *mSelectorWidget = nullptr;
    QDialogButtonBox *mButtonBox = nullptr;
    QgsSymbolWidgetContext mContext;

  private slots:
    void showHelp();
};

#endif