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/*
* Strawberry Music Player
* This file was part of Clementine .
* Copyright 2010 , David Sansome < me @ davidsansome . com >
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* Copyright 2018 - 2021 , Jonas Kvinge < jonas @ jkvinge . net >
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*
* Strawberry 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 3 of the License , or
* ( at your option ) any later version .
*
* Strawberry is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with Strawberry . If not , see < http : //www.gnu.org/licenses/>.
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*
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*/
# ifndef STRETCHHEADERVIEW_H
# define STRETCHHEADERVIEW_H
# include "config.h"
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# include <QObject>
# include <QByteArray>
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# include <QHeaderView>
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# include <QList>
# include <QString>
# include <QVector>
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class QWidget ;
class QAbstractItemModel ;
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class QMouseEvent ;
class QResizeEvent ;
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class StretchHeaderView : public QHeaderView {
Q_OBJECT
public :
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explicit StretchHeaderView ( const Qt : : Orientation orientation , QWidget * parent = nullptr ) ;
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typedef double ColumnWidthType ;
static const int kMinimumColumnWidth ;
static const int kMagicNumber ;
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void setModel ( QAbstractItemModel * model ) override ;
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// Serialises the proportional and actual column widths.
// Use these instead of QHeaderView::restoreState and QHeaderView::saveState to persist the proportional values directly and avoid floating point errors over time.
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bool RestoreState ( const QByteArray & sdata ) ;
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QByteArray SaveState ( ) const ;
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QByteArray ResetState ( ) ;
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// Hides a section and resizes all other sections to fill the gap. Does nothing if you try to hide the last section.
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void HideSection ( const int logical ) ;
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// Shows a section and resizes all other sections to make room.
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void ShowSection ( const int logical ) ;
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// Calls either HideSection or ShowSection.
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void SetSectionHidden ( const int logical , const bool hidden ) ;
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// Sets the width of the given column and resizes other columns appropriately.
// width is the proportion of the entire width from 0.0 to 1.0.
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void SetColumnWidth ( const int logical , const ColumnWidthType width ) ;
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bool is_stretch_enabled ( ) const { return stretch_enabled_ ; }
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public slots :
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// Changes the stretch mode.
// Enabling stretch mode will initialize the proportional column widths from the current state of the header.
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void ToggleStretchEnabled ( ) ;
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void SetStretchEnabled ( const bool enabled ) ;
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signals :
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// Emitted when the stretch mode is changed.
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void StretchEnabledChanged ( bool enabled ) ;
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protected :
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// QWidget
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void mouseMoveEvent ( QMouseEvent * e ) override ;
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void resizeEvent ( QResizeEvent * e ) override ;
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private :
// Scales column_widths_ values so the total is 1.0.
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void NormaliseWidths ( const QList < int > & sections = QList < int > ( ) ) ;
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// Resizes the actual columns to make them match the proportional values in column_widths_.
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void UpdateWidths ( const QList < int > & sections = QList < int > ( ) ) ;
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private slots :
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void SectionResized ( const int logical , const int old_size , const int new_size ) ;
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private :
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bool stretch_enabled_ ;
QVector < ColumnWidthType > column_widths_ ;
bool in_mouse_move_event_ ;
} ;
# endif // STRETCHHEADERVIEW_H