textmargincomponent.h

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// edbee - Copyright (c) 2012-2025 by Rick Blommers and contributors
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include "edbee/exports.h"
 
#include <QWidget>
 
class QEvent;
class QFont;
class QLinearGradient;
class QMouseEvent;
class QPainter;
 
namespace edbee {
 
class TextEditorWidget;
class TextMarginComponent;
class TextRenderer;
class TextTheme;

class EDBEE_EXPORT TextMarginComponentDelegate {
public:
    TextMarginComponentDelegate();
    virtual ~TextMarginComponentDelegate() {}
 
    virtual QString lineText( int line );
 
    virtual int widthBeforeLineNumber();
    virtual void renderBefore( QPainter* painter, int startLine, int endLine, int width );
    virtual void renderAfter( QPainter* painter, int startLine, int endLine, int width );
 
    virtual bool requiresMouseTracking();
    virtual void mouseMoveEvent( int line, QMouseEvent* event );
    virtual void mousePressEvent( int line, QMouseEvent* event );
    virtual void leaveEvent( QEvent* event );
 
    TextMarginComponent* marginComponent() { return marginComponentRef_; }
    void setMarginCompenent( TextMarginComponent* comp ) { marginComponentRef_ = comp; }
 
private:
    TextMarginComponent* marginComponentRef_;           
    int startLine_;                                     
};
class EDBEE_EXPORT TextMarginComponentDelegate {…};
 

class EDBEE_EXPORT TextMarginComponent : public QWidget
{
    Q_OBJECT
 
public:
    TextMarginComponent( TextEditorWidget* editorWidget, QWidget* parent);
    virtual ~TextMarginComponent();
 
    void init();
    void updateMarginFont();
 
    int widthHint() const;
    virtual QSize sizeHint() const;
    bool isGeometryChangeRequired();
 
    void fullUpdate();
    TextEditorWidget* editorWidget() const { return editorRef_;}
    TextRenderer* renderer() const;
 
    TextMarginComponentDelegate* delegate() const { return delegateRef_; }
    void setDelegate( TextMarginComponentDelegate* delegate );
    void giveDelegate( TextMarginComponentDelegate* delegate );
 
protected:
 
    virtual void paintEvent( QPaintEvent* event );
    virtual void renderCaretMarkers( QPainter* painter, int startLine, int endLine, int width );
    virtual void renderLineNumber( QPainter* painter, int startLine, int endLine, int width );
 
    virtual void mouseMoveEvent(QMouseEvent* event);
    virtual void mousePressEvent(QMouseEvent* event);
    virtual void mouseDoubleClickEvent(QMouseEvent *);
    virtual void leaveEvent(QEvent* event);
    virtual void wheelEvent(QWheelEvent* event);
 
public:
    virtual void updateLineAtOffset(int offset);
    virtual void updateLine(int line, int length);
 
protected slots:
 
    virtual void topChanged(int value);
    virtual void connectScrollBar();
    virtual void updateFont();
 
private:
 

    int top_;                                   
    mutable int width_;
    mutable int lastLineCount_;
    QFont* marginFont_;                         
    TextEditorWidget* editorRef_;               
    TextMarginComponentDelegate* delegate_;     
    TextMarginComponentDelegate* delegateRef_;  
};
class EDBEE_EXPORT TextMarginComponent : public QWidget {…};
 
} // edbee