420 lines
12 KiB
C++
420 lines
12 KiB
C++
/* === This file is part of Calamares - <http://github.com/calamares> ===
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*
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* Copyright 2014, Teo Mrnjavac <teo@kde.org>
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*
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* Calamares is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Calamares is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Calamares. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "PartitionSplitterWidget.h"
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#include "utils/Logger.h"
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#include <QApplication>
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#include <QPainter>
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#include <QMouseEvent>
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#include <QStyleOption>
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static const int VIEW_HEIGHT = 30;
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static const int CORNER_RADIUS = 3;
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static const int EXTENDED_PARTITION_MARGIN = 4;
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PartitionSplitterWidget::PartitionSplitterWidget( QWidget* parent )
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: QWidget( parent )
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, m_resizing( false )
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, m_itemToResize( nullptr )
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, m_itemToResizeNext( nullptr )
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, HANDLE_SNAP( QApplication::startDragDistance() )
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{
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setMouseTracking( true );
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}
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void
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PartitionSplitterWidget::init( const QList<PartitionSplitterItem>& items )
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{
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m_itemToResize = nullptr;
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m_itemToResizeNext = nullptr;
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m_itemToResizePath.clear();
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m_items = items;
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repaint();
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foreach ( const PartitionSplitterItem& item, items )
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cDebug() << "PSI added item" << item.itemPath << "size" << item.size;
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}
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void
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PartitionSplitterWidget::setSplitPartition( const QString& path,
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qint64 minSize,
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qint64 maxSize,
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qint64 preferredSize,
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const QString& newLabel )
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{
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cDebug() << Q_FUNC_INFO << "path:" << path
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<< "\nminSize:" << minSize
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<< "\nmaxSize:" << maxSize
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<< "\nprfSize:" << preferredSize;
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if ( m_itemToResize || m_itemToResizeNext || !m_itemToResizePath.isEmpty() )
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{
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cDebug() << "ERROR: trying to split partition but partition to split is already set.";
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return;
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}
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PartitionSplitterItem* itemToResize = _findItem( m_items,
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[ path ]( PartitionSplitterItem& item ) -> bool
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{
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return path == item.itemPath;
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} );
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if ( !itemToResize )
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return;
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cDebug() << "itemToResize:" << itemToResize->itemPath;
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m_itemToResize = itemToResize;
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m_itemToResizePath = path;
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if ( preferredSize > maxSize )
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preferredSize = maxSize;
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qint64 newSize = m_itemToResize->size - preferredSize;
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m_itemToResize->size = preferredSize;
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m_itemMinSize = minSize;
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m_itemMaxSize = maxSize;
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m_itemPrefSize = preferredSize;
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for ( int i = 0; i < m_items.count(); ++i )
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{
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if ( m_items[ i ].itemPath == itemToResize->itemPath )
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{
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m_items.insert( i+1,
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{ "", QColor( "#d667b7" ), false, newSize, {} } );
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m_itemToResizeNext = &( m_items[ i+1 ] );
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break;
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}
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else if ( !m_items[ i ].children.isEmpty() )
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{
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for ( int j = 0; j < m_items[ i ].children.count(); ++j )
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{
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if ( m_items[ i ].children[ j ].itemPath == itemToResize->itemPath )
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{
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m_items[ i ].children.insert( j+1,
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{ "", QColor( "#d667b7" ), false, newSize, {} } );
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m_itemToResizeNext = &( m_items[ i ].children[ j+1 ] );
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break;
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}
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}
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if ( m_itemToResizeNext )
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break;
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}
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}
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repaint();
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emit partitionResized( m_itemToResize->itemPath,
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m_itemToResize->size,
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m_itemToResizeNext->size );
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cDebug() << "Items updated. Status:";
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foreach ( const PartitionSplitterItem& item, m_items )
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cDebug() << "item" << item.itemPath << "size" << item.size;
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}
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qint64
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PartitionSplitterWidget::splitPartitionSize() const
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{
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if ( !m_itemToResize )
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return -1;
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return m_itemToResize->size;
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}
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qint64
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PartitionSplitterWidget::newPartitionSize() const
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{
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if ( !m_itemToResizeNext )
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return -1;
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return m_itemToResizeNext->size;
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}
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QSize
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PartitionSplitterWidget::sizeHint() const
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{
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return QSize( -1, VIEW_HEIGHT );
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}
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void
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PartitionSplitterWidget::paintEvent( QPaintEvent* event )
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{
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QPainter painter( this );
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painter.fillRect( rect(), palette().window() );
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painter.setRenderHint( QPainter::Antialiasing );
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drawPartitions( &painter, rect(), m_items );
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}
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void
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PartitionSplitterWidget::mousePressEvent( QMouseEvent* event )
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{
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if ( event->button() == Qt::LeftButton )
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{
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if ( qAbs( event->x() - m_resizeHandleX ) < HANDLE_SNAP )
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m_resizing = true;
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}
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}
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void
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PartitionSplitterWidget::mouseMoveEvent( QMouseEvent* event )
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{
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if ( m_resizing )
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{
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qint64 start = 0;
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foreach ( const PartitionSplitterItem& item, m_items )
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{
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if ( item.itemPath == m_itemToResize->itemPath )
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break;
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else if ( !item.children.isEmpty() )
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{
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bool done = false;
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foreach ( const PartitionSplitterItem& child, item.children )
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{
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if ( child.itemPath == m_itemToResize->itemPath )
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{
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done = true;
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break;
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}
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start += child.size;
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}
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if ( done )
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break;
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}
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else
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start += item.size;
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}
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qint64 total = 0;
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for ( int row = 0; row < m_items.count(); ++row )
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{
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total += m_items[ row ].size;
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}
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int ew = rect().width(); //effective width
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qreal bpp = total / static_cast< qreal >( ew ); //bytes per pixel
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qreal mx = event->x() * bpp - start;
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// make sure we are within resize range
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mx = qBound( static_cast< qreal >( m_itemMinSize ),
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mx,
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static_cast< qreal >( m_itemMaxSize ) );
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qint64 span = m_itemPrefSize;
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qreal percent = mx / span;
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qint64 oldsize = m_itemToResize->size;
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m_itemToResize->size = qRound64( span * percent );
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m_itemToResizeNext->size -= m_itemToResize->size - oldsize;
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qint64 t = 0;
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for ( int row = 0; row < m_items.count(); ++row )
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{
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t += m_items[ row ].size;
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}
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Q_ASSERT( t == total );
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repaint();
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emit partitionResized( m_itemToResize->itemPath,
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m_itemToResize->size,
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m_itemToResizeNext->size );
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}
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else
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{
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if ( m_itemToResize )
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{
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if ( qAbs( event->x() - m_resizeHandleX ) < HANDLE_SNAP )
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setCursor( Qt::SplitHCursor );
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else if ( cursor().shape() != Qt::ArrowCursor )
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setCursor( Qt::ArrowCursor );
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}
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}
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}
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void
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PartitionSplitterWidget::mouseReleaseEvent( QMouseEvent* event )
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{
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m_resizing = false;
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}
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void
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PartitionSplitterWidget::drawSection( QPainter* painter, const QRect& rect_, int x, int width,
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const PartitionSplitterItem& item )
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{
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QColor color = item.color;
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bool isFreeSpace = item.isFreeSpace;
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QRect rect = rect_;
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const int y = rect.y();
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const int rectHeight = rect.height();
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const int radius = qMax( 1, CORNER_RADIUS - ( height() - rectHeight ) / 2 );
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painter->setClipRect( x, y, width, rectHeight );
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painter->translate( 0.5, 0.5 );
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rect.adjust( 0, 0, -1, -1 );
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const QColor borderColor = color.darker();
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painter->setPen( borderColor );
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painter->setBrush( color );
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painter->drawRoundedRect( rect, radius, radius );
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// Draw shade
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if ( !isFreeSpace )
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rect.adjust( 2, 2, -2, -2 );
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QLinearGradient gradient( 0, 0, 0, rectHeight / 2 );
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qreal c = isFreeSpace ? 0 : 1;
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gradient.setColorAt( 0, QColor::fromRgbF( c, c, c, 0.3 ) );
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gradient.setColorAt( 1, QColor::fromRgbF( c, c, c, 0 ) );
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painter->setPen( Qt::NoPen );
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painter->setBrush( gradient );
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painter->drawRoundedRect( rect, radius, radius );
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painter->translate( -0.5, -0.5 );
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}
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void
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PartitionSplitterWidget::drawResizeHandle( QPainter* painter,
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const QRect& rect_,
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int x )
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{
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if ( !m_itemToResize )
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return;
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painter->setPen( Qt::NoPen );
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painter->setBrush( Qt::black );
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painter->setClipRect( rect_ );
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painter->setRenderHint( QPainter::Antialiasing, true );
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qreal h = rect_.height();
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int scaleFactor = qRound( height() / static_cast< qreal >( VIEW_HEIGHT ) );
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QList< QPair< qreal, qreal > > arrow_offsets = {
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qMakePair( 0, h / 2 - 1 ),
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qMakePair( 4, h / 2 - 1 ),
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qMakePair( 4, h / 2 - 3 ),
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qMakePair( 8, h / 2 ),
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qMakePair( 4, h / 2 + 3 ),
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qMakePair( 4, h / 2 + 1 ),
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qMakePair( 0, h / 2 + 1 )
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};
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for ( int i = 0; i < arrow_offsets.count(); ++i )
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{
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arrow_offsets[ i ] = qMakePair( arrow_offsets[ i ].first * scaleFactor,
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( arrow_offsets[ i ].second - h/2 ) * scaleFactor + h/2 );
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}
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auto p1 = arrow_offsets[ 0 ];
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if ( m_itemToResize->size > m_itemMinSize )
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{
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auto arrow = QPainterPath( QPointF( x + -1 * p1.first, p1.second ) );
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for ( auto p : arrow_offsets )
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arrow.lineTo( x + -1 * p.first + 1, p.second );
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painter->drawPath( arrow );
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}
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if ( m_itemToResize->size < m_itemMaxSize )
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{
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auto arrow = QPainterPath( QPointF( x + p1.first, p1.second ) );
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for ( auto p : arrow_offsets )
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arrow.lineTo( x + p.first, p.second );
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painter->drawPath( arrow );
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}
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painter->setRenderHint( QPainter::Antialiasing, false );
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painter->setPen( Qt::black );
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painter->drawLine( x, 0, x, h - 1 );
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}
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void
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PartitionSplitterWidget::drawPartitions( QPainter* painter,
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const QRect& rect,
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const QList< PartitionSplitterItem >& items )
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{
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const int count = items.count();
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const int totalWidth = rect.width();
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qint64 total = 0;
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for ( int row = 0; row < count; ++row )
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{
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total += items[ row ].size;
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}
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int x = rect.x();
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for ( int row = 0; row < count; ++row )
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{
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const PartitionSplitterItem& item = items[ row ];
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int width;
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if ( row < count - 1 )
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width = totalWidth * ( item.size / static_cast< qreal >( total ) );
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else
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// Make sure we fill the last pixel column
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width = rect.right() - x + 1;
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drawSection( painter, rect, x, width, item );
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if ( !item.children.isEmpty() )
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{
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QRect subRect(
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x + EXTENDED_PARTITION_MARGIN,
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rect.y() + EXTENDED_PARTITION_MARGIN,
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width - 2 * EXTENDED_PARTITION_MARGIN,
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rect.height() - 2 * EXTENDED_PARTITION_MARGIN
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);
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drawPartitions( painter, subRect, item.children );
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}
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if ( item.itemPath == m_itemToResize->itemPath )
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m_resizeHandleX = x + width;
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x += width;
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}
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drawResizeHandle( painter, rect, m_resizeHandleX );
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}
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template < typename F >
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PartitionSplitterItem*
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PartitionSplitterWidget::_findItem( QList< PartitionSplitterItem >& items,
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F condition )
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{
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for ( auto it = items.begin(); it != items.end(); ++it)
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{
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if ( condition( *it ) )
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return &*it;
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PartitionSplitterItem* candidate = _findItem( it->children, condition );
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if ( candidate )
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return candidate;
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}
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return nullptr;
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}
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