use a PartWidget instead of a PartResizerWidget in the partition properties

dialog -- no one is going to do any resizing, after all.

to make this possible, allow creating a PartWidget() without a valid Partition
pointer and add an init() method for later setting the Partition pointer. also
take care of the Partition pointer being NULL everywhere in the class

svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1134172

src/gui/partitionmanagerwidget.cpp

@@ -179,7 +179,7 @@ Partition* PartitionManagerWidget::selectedPartition()
 	// The active partition we get from the part table widget is const; we need non-const.
 	// So take the first sector and find the partition in the selected device's
 	// partition table.
-	const Partition* activePartition = &partTableWidget().activeWidget()->partition();
+	const Partition* activePartition = partTableWidget().activeWidget()->partition();
 	return selectedDevice()->partitionTable()->findPartitionBySector(activePartition->firstSector(), PartitionRole(PartitionRole::Any));
 }
 
@@ -322,22 +322,27 @@ void PartitionManagerWidget::on_m_PartTableWidget_itemSelectionChanged(PartWidge
 		return;
 	}
 
-	const Partition& p = item->partition();
+	const Partition* p = item->partition();
 
-	QList<QTreeWidgetItem*> findResult = treePartitions().findItems(p.deviceNode(), Qt::MatchFixedString | Qt::MatchRecursive, 0);
+	Q_ASSERT(p);
 
-	for (int idx = 0; idx < findResult.size(); idx++)
+	if (p)
 	{
-		const PartitionTreeWidgetItem* ptwItem = dynamic_cast<PartitionTreeWidgetItem*>(findResult[idx]);
+		QList<QTreeWidgetItem*> findResult = treePartitions().findItems(p->deviceNode(), Qt::MatchFixedString | Qt::MatchRecursive, 0);
 
-		if (ptwItem && ptwItem->partition() == &p)
+		for (int idx = 0; idx < findResult.size(); idx++)
 		{
-			treePartitions().setCurrentItem(findResult[idx]);
-			break;
+			const PartitionTreeWidgetItem* ptwItem = dynamic_cast<PartitionTreeWidgetItem*>(findResult[idx]);
+
+			if (ptwItem && ptwItem->partition() == p)
+			{
+				treePartitions().setCurrentItem(findResult[idx]);
+				break;
+			}
 		}
 	}
 
-	emit selectedPartitionChanged(&p);
+	emit selectedPartitionChanged(p);
 }
 
 void PartitionManagerWidget::on_m_PartTableWidget_customContextMenuRequested(const QPoint& pos)

src/gui/partpropsdialog.cpp

@@ -96,7 +96,7 @@ void PartPropsDialog::setupDialog()
 	enableButtonOk(false);
 	button(KDialog::Cancel)->setFocus();
 
-	dialogWidget().partResizerWidget().init(device(), partition(), partition().firstSector(), partition().lastSector(), true, false);
+	dialogWidget().partWidget().init(&partition());
 
 	const QString mp = partition().mountPoint().isEmpty()
 			? i18nc("@item mountpoint", "(none found)")
@@ -315,7 +315,7 @@ void PartPropsDialog::updatePartitionFileSystem()
 	FileSystem* fs = FileSystemFactory::create(newFileSystemType(), partition().firstSector(), partition().lastSector());
 	partition().deleteFileSystem();
 	partition().setFileSystem(fs);
-	dialogWidget().partResizerWidget().update();
+	dialogWidget().partWidget().update();
 }
 
 void PartPropsDialog::onFilesystemChanged(int)

src/gui/partpropswidget.h

@@ -32,7 +32,7 @@ class PartPropsWidget : public QWidget, public Ui::PartPropsWidgetBase
 		PartPropsWidget(QWidget* parent) : QWidget(parent) { setupUi(this); }
 
 	public:
-		PartResizerWidget& partResizerWidget() { Q_ASSERT(m_PartResizerWidget); return *m_PartResizerWidget; }
+		PartWidget& partWidget() { Q_ASSERT(m_PartWidget); return *m_PartWidget; }
 
 		QLabel& mountPoint() { Q_ASSERT(m_LabelMountPoint); return *m_LabelMountPoint; }
 		QLabel& role() { Q_ASSERT(m_LabelRole); return *m_LabelRole; }

src/gui/partpropswidgetbase.ui

@@ -12,7 +12,7 @@
   </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="0" rowspan="2" colspan="3">
-    <widget class="PartResizerWidget" name="m_PartResizerWidget" native="true">
+    <widget class="PartWidget" name="m_PartWidget" native="true">
      <property name="minimumSize">
       <size>
        <width>300</width>
@@ -360,9 +360,9 @@
    <header>kcombobox.h</header>
   </customwidget>
   <customwidget>
-   <class>PartResizerWidget</class>
+   <class>PartWidget</class>
    <extends>QWidget</extends>
-   <header>gui/partresizerwidget.h</header>
+   <header>gui/partwidget.h</header>
    <container>1</container>
   </customwidget>
  </customwidgets>

src/gui/parttablewidget.cpp

@@ -118,7 +118,7 @@ void PartTableWidget::setActivePartition(const Partition* p)
 		return;
 
 	foreach (PartWidget* pw, findChildren<PartWidget*>())
-		if (&pw->partition() == p)
+		if (pw->partition() == p)
 		{
 			setActiveWidget(pw);
 			return;

src/gui/partwidget.cpp

@@ -38,12 +38,22 @@
 */
 PartWidget::PartWidget(QWidget* parent, const Partition* p) :
 	PartWidgetBase(parent),
-	m_Partition(p),
+	m_Partition(NULL),
 	m_Active(false)
 {
 	setFont(KGlobalSettings::smallestReadableFont());
 
-	setToolTip(partition().deviceNode() + '\n' + partition().fileSystem().name() + ' ' + Capacity(partition()).toString());
+	init(p);
+}
+
+void PartWidget::init(const Partition* p)
+{
+	m_Partition = p;
+
+	if (partition())
+		setToolTip(partition()->deviceNode() + '\n' + partition()->fileSystem().name() + ' ' + Capacity(*partition()).toString());
+	else
+		setToolTip(QString());
 
 	updateChildren();
 }
@@ -51,25 +61,29 @@ PartWidget::PartWidget(QWidget* parent, const Partition* p) :
 /** Updates the widget's children */
 void PartWidget::updateChildren()
 {
-	foreach (QWidget* w, childWidgets())
+	if (partition())
 	{
-		w->setVisible(false);
-		w->deleteLater();
-		w->setParent(NULL);
-	}
+		foreach (QWidget* w, childWidgets())
+		{
+			w->setVisible(false);
+			w->deleteLater();
+			w->setParent(NULL);
+		}
 
-	foreach(const Partition* child, partition().children())
-	{
-		QWidget* w = new PartWidget(this, child);
-		w->setVisible(true);
-	}
+		foreach(const Partition* child, partition()->children())
+		{
+			QWidget* w = new PartWidget(this, child);
+			w->setVisible(true);
+		}
 
-	positionChildren(this, partition().children(), childWidgets());
+		positionChildren(this, partition()->children(), childWidgets());
+	}
 }
 
 void PartWidget::resizeEvent(QResizeEvent*)
 {
-	positionChildren(this, partition().children(), childWidgets());
+	if (partition())
+		positionChildren(this, partition()->children(), childWidgets());
 }
 
 QColor PartWidget::activeColor(const QColor& col) const
@@ -79,20 +93,23 @@ QColor PartWidget::activeColor(const QColor& col) const
 
 void PartWidget::paintEvent(QPaintEvent*)
 {
-	const int usedPercentage = partition().used() * 100 / partition().capacity();
+	if (partition() == NULL)
+		return;
+
+	const int usedPercentage = partition()->used() * 100 / partition()->capacity();
 	const int w = (width() - 1 - (PartWidget::borderWidth() * 2)) * usedPercentage / 100;
 
 	QPainter painter(this);
 
 	// draw border
 	painter.setPen(isActive() ? QColor(250, 250, 250) : QColor(20, 20, 20));
-	painter.setBrush(activeColor(Config::fileSystemColorCode(partition().fileSystem().type())));
+	painter.setBrush(activeColor(Config::fileSystemColorCode(partition()->fileSystem().type())));
 	painter.drawRect(QRect(0, 0, width() - 1, height() - 1));
 
-	if (partition().roles().has(PartitionRole::Extended))
+	if (partition()->roles().has(PartitionRole::Extended))
 		return;
 
-	if (!partition().roles().has(PartitionRole::Unallocated))
+	if (!partition()->roles().has(PartitionRole::Unallocated))
 	{
 		// draw free space background
 		painter.setBrush(activeColor(Config::availableSpaceColorCode()));
@@ -104,7 +121,7 @@ void PartWidget::paintEvent(QPaintEvent*)
 	}
 
 	// draw name and size
-	QString text = partition().deviceNode().remove("/dev/") + '\n' + Capacity(partition()).toString();
+	QString text = partition()->deviceNode().remove("/dev/") + '\n' + Capacity(*partition()).toString();
 
 	const QRect textRect(0, 0, width() - 1, height() - 1);
 	const QRect boundingRect = painter.boundingRect(textRect, Qt::AlignVCenter | Qt::AlignHCenter, text);

src/gui/partwidget.h

@@ -41,14 +41,15 @@ class PartWidget : public PartWidgetBase
 	Q_OBJECT
 
 	public:
-		PartWidget(QWidget* parent, const Partition* p);
+		PartWidget(QWidget* parent, const Partition* p = NULL);
 
 	public:
+		void init(const Partition* p);
 		void setActive(bool b) { m_Active = b; }
 		bool isActive() const { return m_Active; } /**< @return true if this is the currently active widget */
 		void updateChildren();
 
-		const Partition& partition() const { Q_ASSERT(m_Partition); return *m_Partition; } /**< @return the widget's Partition */
+		const Partition* partition() const { return m_Partition; } /**< @return the widget's Partition */
 
 	protected:
 		void paintEvent(QPaintEvent* event);