tdehwdevicemanager: fix SEGV caused by removing a device when the Device list

dialog is open. Also make sure to update the device list correctly when
a device is removed.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit c9e2911bdb07fe817b75947c6e896552fa64cddf)

3 files changed, 21 insertions, 18 deletions

diff --git a/kcontrol/hwmanager/deviceiconview.h b/kcontrol/hwmanager/deviceiconview.h
index 913c4c9ef..746fb2253 100644
--- a/kcontrol/hwmanager/deviceiconview.h
+++ b/kcontrol/hwmanager/deviceiconview.h
@@ -32,31 +32,25 @@ class ConfigModuleList;
 class DeviceIconItem : public TDEListViewItem
 {
 public:
-	DeviceIconItem(TQListViewItem *parent, const TQString& text, const TQPixmap& pm, TDEGenericDevice *d = 0)
+	DeviceIconItem(TQListViewItem *parent, const TQString& text, const TQPixmap& pm, TQString deviceUid)
 		: TDEListViewItem(parent, text)
-		, _tag(TQString::null)
-		, _device(d)
+		, _deviceUid(deviceUid)
 		{
 			setPixmap(0, pm);
 		}
-	DeviceIconItem(TQListView *parent, const TQString& text, const TQPixmap& pm, TDEGenericDevice *d = 0)
+	DeviceIconItem(TQListView *parent, const TQString& text, const TQPixmap& pm, TQString deviceUid)
 		: TDEListViewItem(parent, text)
-		, _tag(TQString::null)
-		, _device(d)
+		, _deviceUid(deviceUid)
 		{
 			setPixmap(0, pm);
 		}
 		
-		void setDevice(TDEGenericDevice* d) { _device = d; }
-		void setTag(const TQString& t) { _tag = t; }
+		void setDevice(TQString deviceUid) { _deviceUid = deviceUid; }
 		
-		TDEGenericDevice* device() { return _device; }
-		TQString tag() { return _tag; }
-	
+		TDEGenericDevice* device() { return TDEGlobal::hardwareDevices()->findByUniqueID(_deviceUid); }
 	
 private:
-		TQString _tag;
-		TDEGenericDevice *_device;
+		TQString _deviceUid;  // device unique id
 };
 
 class DeviceIconView : public TDEListView
diff --git a/kcontrol/hwmanager/hwmanager.cpp b/kcontrol/hwmanager/hwmanager.cpp
index 25b4a6e71..714dad88d 100644
--- a/kcontrol/hwmanager/hwmanager.cpp
+++ b/kcontrol/hwmanager/hwmanager.cpp
@@ -23,6 +23,7 @@
 #include <tqlayout.h>
 #include <tqlineedit.h>
 #include <tqpushbutton.h>
+#include <tqtimer.h>
 
 #include <dcopclient.h>
 
@@ -93,7 +94,7 @@ TDEHWManager::TDEHWManager(TQWidget *parent, const char *name, const TQStringLis
 	connect(base->showByConnection, TQT_SIGNAL(clicked()), TQT_SLOT(populateTreeView()));
 
 	connect(hwdevices, TQT_SIGNAL(hardwareAdded(TDEGenericDevice*)), this, TQT_SLOT(populateTreeView()));
-	connect(hwdevices, TQT_SIGNAL(hardwareRemoved(TDEGenericDevice*)), this, TQT_SLOT(populateTreeView()));
+	connect(hwdevices, TQT_SIGNAL(hardwareRemoved(TDEGenericDevice*)), this, TQT_SLOT(delayedPopulateTreeView()));
 	connect(hwdevices, TQT_SIGNAL(hardwareUpdated(TDEGenericDevice*)), this, TQT_SLOT(deviceChanged(TDEGenericDevice*)));
 
 	load();
@@ -148,7 +149,7 @@ void TDEHWManager::populateTreeView()
 		TDEGenericHardwareList hwlist = hwdevices->listByDeviceClass(TDEGenericDeviceType::RootSystem);
 		TDEGenericDevice *hwdevice;
 		for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
-			DeviceIconItem* item = new DeviceIconItem(base->deviceTree, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice);
+			DeviceIconItem* item = new DeviceIconItem(base->deviceTree, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice->uniqueID());
 			if ((!selected_syspath.isNull()) && (hwdevice->systemPath() == selected_syspath)) {
 				base->deviceTree->ensureItemVisible(item);
 				base->deviceTree->setSelected(item, true);
@@ -160,11 +161,11 @@ void TDEHWManager::populateTreeView()
 		TDEHardwareDevices *hwdevices = TDEGlobal::hardwareDevices();
 		for (int i=0;i<=TDEGenericDeviceType::Last;i++) {
 			if (i != TDEGenericDeviceType::Root) {
-				DeviceIconItem* rootitem = new DeviceIconItem(base->deviceTree, hwdevices->getFriendlyDeviceTypeStringFromType((TDEGenericDeviceType::TDEGenericDeviceType)i), hwdevices->getDeviceTypeIconFromType((TDEGenericDeviceType::TDEGenericDeviceType)i, base->deviceTree->iconSize()), 0);
+				DeviceIconItem* rootitem = new DeviceIconItem(base->deviceTree, hwdevices->getFriendlyDeviceTypeStringFromType((TDEGenericDeviceType::TDEGenericDeviceType)i), hwdevices->getDeviceTypeIconFromType((TDEGenericDeviceType::TDEGenericDeviceType)i, base->deviceTree->iconSize()), TQString::null);
 				TDEGenericDevice *hwdevice;
 				TDEGenericHardwareList hwlist = hwdevices->listByDeviceClass((TDEGenericDeviceType::TDEGenericDeviceType)i);
 				for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
-					DeviceIconItem* item = new DeviceIconItem(rootitem, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice);
+					DeviceIconItem* item = new DeviceIconItem(rootitem, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice->uniqueID());
 					if ((!selected_syspath.isNull()) && (hwdevice->systemPath() == selected_syspath)) {
 						base->deviceTree->ensureItemVisible(item);
 						base->deviceTree->setSelected(item, true);
@@ -175,6 +176,13 @@ void TDEHWManager::populateTreeView()
 	}
 }
 
+void TDEHWManager::delayedPopulateTreeView() {
+	// When hardwareRemoved() is triggered, the list of devices still contains the device which
+	// is about to be removed. Therefore we need to delay repopulating the device tree after the
+	// removal of the device.
+	TQTimer::singleShot(0, this, TQT_SLOT(populateTreeView()));
+}
+
 void TDEHWManager::populateTreeViewLeaf(DeviceIconItem *parent, bool show_by_connection, TQString selected_syspath) {
 	if (show_by_connection) {
 		TDEHardwareDevices *hwdevices = TDEGlobal::hardwareDevices();
@@ -182,7 +190,7 @@ void TDEHWManager::populateTreeViewLeaf(DeviceIconItem *parent, bool show_by_con
 		TDEGenericDevice *hwdevice;
 		for ( hwdevice = hwlist.first(); hwdevice; hwdevice = hwlist.next() ) {
 			if (hwdevice->parentDevice() == parent->device()) {
-				DeviceIconItem* item = new DeviceIconItem(parent, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice);
+				DeviceIconItem* item = new DeviceIconItem(parent, hwdevice->detailedFriendlyName(), hwdevice->icon(base->deviceTree->iconSize()), hwdevice->uniqueID());
 				if ((!selected_syspath.isNull()) && (hwdevice->systemPath() == selected_syspath)) {
 					base->deviceTree->ensureItemVisible(item);
 					base->deviceTree->setSelected(item, true);
diff --git a/kcontrol/hwmanager/hwmanager.h b/kcontrol/hwmanager/hwmanager.h
index b75a494d9..892ed8dfe 100644
--- a/kcontrol/hwmanager/hwmanager.h
+++ b/kcontrol/hwmanager/hwmanager.h
@@ -59,6 +59,7 @@ k_dcop:
 
 private slots:
 	void populateTreeView();
+	void delayedPopulateTreeView();
 	void populateTreeViewLeaf(DeviceIconItem *parent, bool show_by_connection, TQString selected_syspath);
 	void deviceChanged(TDEGenericDevice*);