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Add documentation for partition table types.

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Teo Mrnjavac 9 years ago
parent 83cbe16918
commit 93c515ccef
1 changed files with 108 additions and 15 deletions
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123
src/modules/partition/gui/DeviceInfoWidget.cpp
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@ -41,20 +41,11 @@ DeviceInfoWidget::DeviceInfoWidget( QWidget* parent )
mainLayout->addWidget( m_bootIcon );
mainLayout->addWidget( m_bootLabel );
mainLayout->addSpacing( CalamaresUtils::defaultFontHeight() / 4 );
mainLayout->addWidget( m_ptIcon );
mainLayout->addWidget( m_ptLabel );
bool isEfi = false;
if ( QDir( "/sys/firmware/efi/efivars" ).exists() )
isEfi = true;
if ( isEfi )
m_bootLabel->setText( "EFI " );
else
m_bootLabel->setText( "BIOS" );
QSize iconSize = QSize( CalamaresUtils::defaultFontHeight(),
CalamaresUtils::defaultFontHeight() );
QSize iconSize = CalamaresUtils::defaultIconSize();
m_bootIcon->setMargin( 0 );
m_bootIcon->setFixedSize( iconSize );
@ -68,14 +59,20 @@ DeviceInfoWidget::DeviceInfoWidget( QWidget* parent )
iconSize ) );
QFontMetrics fm = QFontMetrics( QFont() );
m_ptLabel->setMinimumWidth( fm.boundingRect( "MSDOS" ).width() +2 );
m_bootLabel->setMinimumWidth( fm.boundingRect( "BIOS" ).width() +2 );
m_ptLabel->setMinimumWidth( fm.boundingRect( "MSDOS" ).width() + CalamaresUtils::defaultFontHeight() / 2 );
m_bootLabel->setMinimumWidth( fm.boundingRect( "BIOS" ).width() + CalamaresUtils::defaultFontHeight() / 2 );
m_ptLabel->setAlignment( Qt::AlignCenter );
m_bootLabel->setAlignment( Qt::AlignCenter );
QPalette palette;
palette.setBrush( QPalette::Foreground, QColor( "#4D4D4D" ) ); //dark grey
m_ptIcon->setAutoFillBackground( true );
m_bootIcon->setAutoFillBackground( true );
m_ptLabel->setAutoFillBackground( true );
m_bootLabel->setAutoFillBackground( true );
m_ptIcon->setPalette( palette );
m_bootIcon->setPalette( palette );
m_ptLabel->setPalette( palette );
m_bootLabel->setPalette( palette );
@ -86,19 +83,66 @@ DeviceInfoWidget::DeviceInfoWidget( QWidget* parent )
"environment runs in compatibility mode.<br>"
"Relevant entries in the system setup utility "
"include: CSM, compatibility support module, "
"Legacy boot, BIOS boot, etc." ) );
"Legacy boot mode, BIOS mode, etc." ) );
m_ptIcon->setToolTip( tr( "The type of <strong>partition table</strong> currently "
"present on the selected storage device.<br><br>"
"Common values on x86-compatible systems include "
"<strong>GPT</strong> and <strong>MSDOS</strong>.<br>"
"Some systems may use other, less common partition table "
"types, like BSD or Sun."
"types, like BSD or Sun.<br>"
"The only way to change the partition table type is to "
"erase and recreate the partition table from scratch, "
"which destroys all data on the storage device.<br>"
"This installer will keep the current partition table "
"unless you explicitly choose otherwise.<br>"
"If unsure, on modern systems GPT is preferred." ) );
bool isEfi = false;
if ( QDir( "/sys/firmware/efi/efivars" ).exists() )
isEfi = true;
QString bootToolTip;
if ( isEfi )
{
m_bootLabel->setText( "EFI " );
bootToolTip = tr( "This system was started with an <strong>EFI</strong> "
"boot environment.<br><br>"
"Most consumer systems nowadays use EFI, along with a "
"GPT partition table.<br>"
"Current versions of other operating systems, like Windows "
"and Mac OS X also support EFI, and dual boot is possible.<br>"
"In order to boot from an EFI environment, this installer "
"must deploy a boot loader application, like <strong>GRUB"
"</strong> or <strong>systemd-boot</strong> on an <strong>"
"EFI System Partition</strong>. This is automatic, unless "
"you choose manual partitioning, in which case you must "
"choose it or create it on your own." );
}
else
{
m_bootLabel->setText( "BIOS" );
bootToolTip = tr( "This system was started with a <strong>BIOS</strong> "
"boot environment.<br><br>"
"Older systems which do not support EFI start from BIOS.<br>"
"New systems that support EFI can also start in BIOS mode "
"through a compatibility layer, sometimes known as "
"CSM, Legacy boot mode or BIOS mode. On such systems "
"EFI should be preferred, unless you wish to dual boot "
"with an old operating system, like Windows XP. In that "
"case, a MSDOS partition table should also be used instead "
"of GPT.<br>"
"In order to boot from a BIOS environment, this installer "
"must install a boot loader, like <strong>GRUB"
"</strong>, either at the beginning of a partition or "
"on the <strong>Master Boot Record</strong> near the "
"beginning of the partition table (preferred). "
"This is automatic, unless "
"you choose manual partitioning, in which case you must "
"set it up on your own." );
}
m_bootLabel->setToolTip( bootToolTip );
}
@ -106,6 +150,7 @@ void
DeviceInfoWidget::setPartitionTableType( PartitionTable::TableType type )
{
QString typeString = PartitionTable::tableTypeToName( type ).toUpper();
// fix up if the name shouldn't be uppercase:
switch ( type )
{
@ -125,6 +170,54 @@ DeviceInfoWidget::setPartitionTableType( PartitionTable::TableType type )
typeString = " ? ";
}
QString toolTipString = tr( "The selected storage device has a partition "
"table. The partition table type is <strong>%1</strong>." )
.arg( typeString );
switch ( type )
{
case PartitionTable::loop:
toolTipString = tr( "The selected storage device is a <strong>loop</strong> "
"device.<br><br>"
"This is not an actual partition table, it is "
"a pseudo-device that makes a file accessible as a block device. "
"This kind of setup usually only contains a single filesystem." );
break;
case PartitionTable::unknownTableType:
toolTipString = tr( "This installer <strong>cannot detect a partition table</strong> on the "
"selected storage device.<br><br>"
"The device either has no partition "
"table, or the partition table is corrupted or of an unknown "
"type.<br>"
"This installer can create a new partition table for you, "
"either automatically, or through the manual partitioning "
"page." );
break;
case PartitionTable::gpt:
toolTipString += tr( "<br><br>This is the recommended partition table type for modern "
"systems which start from an <strong>EFI</strong> boot "
"environment." );
break;
case PartitionTable::msdos:
case PartitionTable::msdos_sectorbased:
toolTipString += tr( "<br><br>This partition table type is only advisable on older "
"systems which start from a <strong>BIOS</strong> boot "
"environment. For most uses GPT should be preferred "
"instead.<br>"
"<strong>Warning:</strong> the MSDOS partition table "
"is an obsolete standard with important drawbacks.<br>"
"Only 4 <em>primary</em> partitions may be created, and of "
"those 4, one can be an <em>extended</em> partition, which "
"may in turn contain many <em>logical</em> partitions."
"<br>For compatibility reasons, it is recommended for a "
"setup based on an MSDOS partition table to have a "
"separate boot partition. This installer can create "
"the boot partition for you automatically, or you may "
"set it up yourself on the manual partitioning page." );
}
m_ptLabel->setText( typeString );
m_ptLabel->setToolTip( toolTipString );
}

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