File indexing completed on 2025-01-05 03:59:31

 // SPDX-License-Identifier: LGPL-2.1-or-later
 //
 // SPDX-FileCopyrightText: 2009 Bastian Holst <bastianholst@gmx.de>
 //
 
 // Self
 #include "PluginItemDelegate.h"
 
 // Qt
 #include <QEvent>
 #include <QSize>
 #include <QVariant>
 #include <QAbstractItemView>
 #include <QMouseEvent>
 #include <QStandardItemModel>
 #include <QApplication>
 #include <QPainter>
 
 #include <klocalizedstring.h>
 
 // Marble
 #include "RenderPluginModel.h"
 
 #include "digikam_debug.h"
 
 using namespace Marble;
 
 const QSize iconSize( 16, 16 );
 
 PluginItemDelegate::PluginItemDelegate( QAbstractItemView *view, QObject * parent )
     : QAbstractItemDelegate( parent )
 {
     // Enable mouse tracking of itemview makes it possible to find when the mouse if moved
     // without pressed buttons.
     view->setMouseTracking( true );
 }
 
 PluginItemDelegate::~PluginItemDelegate()
 {
 }
 
 void PluginItemDelegate::paint( QPainter *painter,
                                 const QStyleOptionViewItem& option,
                                 const QModelIndex& index ) const
 {
     Q_ASSERT( index.isValid() );
     QRect rect = option.rect;
     QStyle *style = QApplication::style();
 
     painter->save();
 
     // Drawing the background
     QStyleOption background = option;
     style->drawPrimitive( QStyle::PE_PanelItemViewItem, &option, painter );
 
     painter->translate( rect.topLeft() );
 
     // rect is now represented in item coordinates
     rect.moveTopLeft( QPoint( 0, 0 ) );
     // The point at the top left of the available drawing area.
     QPoint topLeft( 0, 0 );
     // The point at the top right of the available drawing area.
     QPoint topRight( rect.topRight() );
 
     QRect nameRect = rect;
 
     // Painting the checkbox
     QStyleOptionButton checkBox = checkboxOption( option, index, topLeft.x(), Qt::AlignLeft );
     painter->save();
     style->drawControl( QStyle::CE_CheckBox, &checkBox, painter );
     painter->restore();
 
     nameRect.setLeft( checkBox.rect.right() + 1 );
 
     // Painting the About Button
     QStyleOptionButton button = buttonOption( option, index, PluginItemDelegate::About,
                                               topRight.x(), Qt::AlignRight );
     style->drawControl( QStyle::CE_PushButton, &button, painter );
     topRight -= QPoint( button.rect.width(), 0 );
 
     // Painting the Configure Button
     if ( index.data( RenderPluginModel::ConfigurationDialogAvailable ).toBool() ) {
         QStyleOptionButton button = buttonOption( option, index, PluginItemDelegate::Configure,
                                                   topRight.x(), Qt::AlignRight );
         style->drawControl( QStyle::CE_PushButton, &button, painter );
         topRight -= QPoint( button.rect.width(), 0 );
 
         nameRect.setRight( button.rect.left() -1 );
     }
 
     // Painting the Icon
     const QIcon icon = index.data( Qt::DecorationRole ).value<QIcon>();
     const QPixmap iconPixmap = icon.pixmap(16, 16);
 
     nameRect.moveBottom( nameRect.bottom()+5 );
     style->drawItemPixmap( painter,
                            nameRect,
                            Qt::AlignLeft,
                            iconPixmap );
 
     nameRect.setLeft( nameRect.left() + 16 + 5 );
     nameRect.moveBottom( nameRect.bottom()-5 );
 
     // Painting the Name string
     QString name = index.data( Qt::DisplayRole ).toString();
 
     style->drawItemText( painter,
                          nameRect,
                          Qt::AlignLeft | Qt::AlignVCenter,
                          option.palette,
                          true,
                          name );
 
     painter->restore();
 }
 
 QSize PluginItemDelegate::sizeHint( const QStyleOptionViewItem& option,
                                     const QModelIndex & index ) const
 {
     QSize size;
 
     QStyleOptionViewItem opt = option;
     opt.rect = QRect( 0, 0, 0, 0 );
     QVector<QSize> elementSize;
     elementSize.reserve(4);
     QStyleOptionButton checkBox = checkboxOption( opt, index );
     elementSize.append( checkBox.rect.size() );
     QStyleOptionButton aboutButton = buttonOption( opt, index, PluginItemDelegate::About );
     elementSize.append( aboutButton.rect.size() );
     QStyleOptionButton configButton = buttonOption( opt, index, PluginItemDelegate::Configure );
     elementSize.append( configButton.rect.size() );
     elementSize.append( nameSize( index ) );
 
     for( const QSize& buttonSize: elementSize ) {
         if( buttonSize.height() > size.height() )
             size.setHeight( buttonSize.height() );
         size.setWidth( size.width() + buttonSize.width() );
     }
 
     return size;
 }
 
 void PluginItemDelegate::setAboutIcon( const QIcon& icon )
 {
     m_aboutIcon = icon;
 }
 
 void PluginItemDelegate::setConfigIcon( const QIcon& icon )
 {
     m_configIcon = icon;
 }
 
 bool PluginItemDelegate::editorEvent( QEvent *event,
                                       QAbstractItemModel *model,
                                       const QStyleOptionViewItem &option,
                                       const QModelIndex &index )
 {
     Q_ASSERT(event);
     Q_ASSERT(model);
 
     if ( ( event->type() == QEvent::MouseButtonRelease )
          || ( event->type() == QEvent::MouseButtonDblClick )
          || ( event->type() == QEvent::MouseButtonPress )
          || ( event->type() == QEvent::MouseMove ) )
     {
         QMouseEvent *me = static_cast<QMouseEvent*>(event);
         QPoint mousePosition = me->pos() - option.rect.topLeft();
 
         if ( ( event->type() == QEvent::MouseMove )
              && !( me->buttons() & Qt::LeftButton ) )
         {
             // If the mouse moves around and no left button is pressed, no pushbutton is pressed
             // and no other event will be successful.
             m_aboutPressedIndex = QModelIndex();
             m_configPressedIndex = QModelIndex();
             return true;
         }
 
         // Handle checkbox
         QRect checkRect = checkboxOption( option, index, 0, Qt::AlignLeft ).rect;
         if ( checkRect.contains( mousePosition )
              && ( ( event->type() == QEvent::MouseButtonDblClick )
                    || ( event->type() == QEvent::MouseButtonRelease ) ) )
         {
             // make sure that the item is checkable
             Qt::ItemFlags flags = model->flags(index);
             if ( !( flags & Qt::ItemIsUserCheckable ) || !( option.state & QStyle::State_Enabled )
                 || !( flags & Qt::ItemIsEnabled ) )
                 return false;
 
             // make sure that we have a check state
             QVariant checkValue = index.data( Qt::CheckStateRole );
             if ( !checkValue.isValid() )
                 return false;
 
             // eat the double click events inside the check rect
             if ( event->type() == QEvent::MouseButtonDblClick )
                 return true;
 
             Qt::CheckState state = ( static_cast<Qt::CheckState>( checkValue.toInt() ) == Qt::Checked
                                      ? Qt::Unchecked : Qt::Checked );
             return model->setData(index, state, Qt::CheckStateRole);
         }
 
         if ( ( event->type() == QEvent::MouseMove )
              && !( me->buttons() & Qt::LeftButton ) )
         {
             m_aboutPressedIndex = QModelIndex();
             m_configPressedIndex = QModelIndex();
             return true;
         }
 
         QPoint topRight = option.rect.topRight();
 
         // Handle aboutButton
         {
             QRect aboutRect = buttonOption( option,
                                             index,
                                             PluginItemDelegate::About,
                                             topRight.x(),
                                             Qt::AlignRight ).rect;
             if ( aboutRect.contains( mousePosition ) ) {
                 if ( event->type() == QEvent::MouseButtonDblClick )
                     return true;
                 if ( event->type() == QEvent::MouseButtonPress ) {
                     m_aboutPressedIndex = index;
                     m_configPressedIndex = QModelIndex();
                     return true;
                 }
                 if ( event->type() == QEvent::MouseButtonRelease ) {
                     m_aboutPressedIndex = QModelIndex();
                     m_configPressedIndex = QModelIndex();
                     Q_EMIT aboutPluginClicked( index );
                     return true;
                 }
                 if ( event->type() == QEvent::MouseMove ) {
                     if ( me->buttons() & Qt::LeftButton ) {
                         m_aboutPressedIndex = index;
                         m_configPressedIndex = QModelIndex();
                         return true;
                     }
                     else {
                         m_aboutPressedIndex = QModelIndex();
                         m_configPressedIndex = QModelIndex();
                         return true;
                     }
                 }
             }
             else {
                 // If the mouse is on the item and the mouse isn't above the button.
                 // no about button is pressed.
                 m_aboutPressedIndex = QModelIndex();
             }
             topRight -= QPoint( aboutRect.width(), 0 );
         }
 
         // Handle configButton
         // make sure we have config button
         if ( index.data( RenderPluginModel::ConfigurationDialogAvailable ).toBool() ) {
             QRect configRect = buttonOption( option,
                                              index,
                                              PluginItemDelegate::Configure,
                                              topRight.x(),
                                              Qt::AlignRight ).rect;
             if( configRect.contains( mousePosition ) ) {
                 if ( event->type() == QEvent::MouseButtonDblClick )
                     return true;
 
                 if ( event->type() == QEvent::MouseButtonPress ) {
                     m_aboutPressedIndex = QModelIndex();
                     m_configPressedIndex = index;
                     return true;
                 }
                 if ( event->type() == QEvent::MouseButtonRelease ) {
                     m_aboutPressedIndex = QModelIndex();
                     m_configPressedIndex = QModelIndex();
                     Q_EMIT configPluginClicked( index );
                     return true;
                 }
                 if ( event->type() == QEvent::MouseMove ) {
                     if ( me->buttons() & Qt::LeftButton ) {
                         m_aboutPressedIndex = QModelIndex();
                         m_configPressedIndex = index;
                         return true;
                     }
                     else {
                         m_aboutPressedIndex = QModelIndex();
                         m_configPressedIndex = QModelIndex();
                         return true;
                     }
                 }
             }
             else {
                 // If the mouse is on the item and the mouse isn't above the button.
                 // no config button is pressed.
                 m_configPressedIndex = QModelIndex();
             }
 
             topRight -= QPoint( configRect.width(), 0 );
         }
         else {
             // If we don't have an config dialog shown and the mouse is over this item,
             // no config button is pressed.
             m_configPressedIndex = QModelIndex();
         }
     }
 
     return false;
 }
 
 QStyleOptionButton PluginItemDelegate::checkboxOption( const QStyleOptionViewItem& option,
                                                        const QModelIndex& index,
                                                        int position,
                                                        Qt::AlignmentFlag alignment )
 {
     QStyleOptionButton styleOptionButton;
     if ( index.data( Qt::CheckStateRole ).toBool() )
         styleOptionButton.state = option.state | QStyle::State_On;
     else
         styleOptionButton.state = option.state | QStyle::State_Off;
     QSize size = QApplication::style()->sizeFromContents( QStyle::CT_CheckBox, &option, QSize() );
     if ( size.isEmpty() ) {
         // A checkbox has definitely a size != 0
         styleOptionButton.rect.setSize( QSize( 22, 22 ) );
     }
     else {
         styleOptionButton.rect.setSize( QSize( size.width(), size.height() ) );
     }
     styleOptionButton.rect = alignRect( styleOptionButton.rect, option.rect, position, alignment );
     return styleOptionButton;
 }
 
 QStyleOptionButton PluginItemDelegate::buttonOption( const QStyleOptionViewItem& option,
                                                      const QModelIndex& index,
                                                      PluginItemDelegate::ButtonType type,
                                                      int position,
                                                      Qt::AlignmentFlag alignment ) const
 {
     QStyleOptionButton buttonOption;
     buttonOption.state = option.state;
     buttonOption.state &= ~QStyle::State_HasFocus;
 
     buttonOption.rect.setTopLeft( QPoint( 0, 0 ) );
     buttonOption.palette = option.palette;
     buttonOption.features = QStyleOptionButton::None;
 
     QSize contentSize;
     if ( type == PluginItemDelegate::About ) {
         if ( m_aboutIcon.isNull() ) {
             buttonOption.text = i18n( "About" );
             contentSize = buttonOption.fontMetrics.size( 0, buttonOption.text ) + QSize( 4, 4 );
         }
         else {
             buttonOption.icon = m_aboutIcon;
             buttonOption.iconSize = iconSize;
             contentSize = iconSize;
         }
 
         if ( m_aboutPressedIndex == index ) {
             buttonOption.state |= QStyle::State_Sunken;
         }
     }
     else if ( type == PluginItemDelegate::Configure ) {
         if ( m_configIcon.isNull() ) {
             buttonOption.text = i18n( "Configure" );
             contentSize = buttonOption.fontMetrics.size( 0, buttonOption.text ) + QSize( 4, 4 );
         }
         else {
             buttonOption.icon = m_configIcon;
             buttonOption.iconSize = iconSize;
             contentSize = iconSize;
         }
         if ( m_configPressedIndex == index ) {
             buttonOption.state |= QStyle::State_Sunken;
         }
     }
 
     QSize buttonSize = QApplication::style()->sizeFromContents( QStyle::CT_PushButton,
                                                                 &buttonOption,
                                                                 contentSize );
     buttonOption.rect.setSize( buttonSize );
     buttonOption.rect = alignRect( buttonOption.rect, option.rect, position, alignment );
     return buttonOption;
 }
 
 QSize PluginItemDelegate::nameSize( const QModelIndex& index )
 {
     QString name = index.data( Qt::DisplayRole ).toString();
     // FIXME: QApplication::fontMetrics() doesn't work for non-application fonts
     QSize nameSize( QFontMetrics(qApp->font()).size( 0, name ) );
     return nameSize;
 }
 
 QRect PluginItemDelegate::alignRect( const QRect& object,
                                      const QRect& frame,
                                      int position,
                                      Qt::AlignmentFlag alignment )
 {
     QRect rect = object;
 
     rect.setTopLeft( QPoint( 0, 0 ) );
     // Moves the object to the middle of the item.
     if ( rect.height() < frame.height() ) {
         rect.moveTop( ( frame.height() - rect.height() ) / 2 );
     }
 
     if ( alignment & Qt::AlignLeft ) {
         rect.moveLeft( position );
     }
     else if ( alignment & Qt::AlignRight ) {
         rect.moveRight( position );
     }
 
     return rect;
 }
 
 
 #include "moc_PluginItemDelegate.cpp"