C++ BPartition::CanInitialize方法代码示例

	void _InitializePartition()
	{
		if (!fPrepared) {
			if (fDevice->IsReadOnly())
				printf("Device is read-only!\n");
			else
				printf("Sorry, not prepared for modifications!\n");
			return;
		}

		// get the partition
		int32 partitionIndex;
		BPartition* partition = NULL;
		if (!_SelectPartition("partition index [-1 to abort]: ", partition,
				partitionIndex)) {
			return;
		}

		printf("\nselected partition:\n\n");
		print_partition_table_header();
		print_partition(partition, 0, partitionIndex);

		// get available disk systems
		BObjectList<BDiskSystem> diskSystems(20, true);
		BDiskDeviceRoster roster;
		{
			BDiskSystem diskSystem;
			while (roster.GetNextDiskSystem(&diskSystem) == B_OK) {
				if (partition->CanInitialize(diskSystem.PrettyName()))
					diskSystems.AddItem(new BDiskSystem(diskSystem));
			}
		}

		if (diskSystems.IsEmpty()) {
			printf("There are no disk systems, that can initialize this "
				"partition.\n");
			return;
		}

		// print the available disk systems
		printf("\ndisk systems that can initialize the selected partition:\n");
		for (int32 i = 0; BDiskSystem* diskSystem = diskSystems.ItemAt(i); i++)
			printf("%2ld  %s\n", i, diskSystem->PrettyName());

		printf("\n");

		// get the disk system
		int64 diskSystemIndex;
		if (!_ReadNumber("disk system index [-1 to abort]: ", 0,
				diskSystems.CountItems() - 1, -1, "invalid index",
				diskSystemIndex)) {
			return;
		}
		BDiskSystem* diskSystem = diskSystems.ItemAt(diskSystemIndex);

		bool supportsName = diskSystem->SupportsContentName();
		BString name;
		BString parameters;
		while (true) {
			// let the user enter name and parameters
			if (supportsName && !_ReadLine("partition name: ", name)
				|| !_ReadLine("partition parameters: ", parameters)) {
				return;
			}

			// validate parameters
			BString validatedName(name);
			if (partition->ValidateInitialize(diskSystem->PrettyName(),
					supportsName ? &validatedName : NULL, parameters.String())
					!= B_OK) {
				printf("Validation of the given values failed. Sorry, can't "
					"continue.\n");
				return;
			}

			// did the disk system change the name?
			if (!supportsName || name == validatedName) {
				printf("Everything looks dandy.\n");
			} else {
				printf("The disk system adjusted the file name to \"%s\".\n",
					validatedName.String());
				name = validatedName;
			}

			// let the user decide whether to continue, change parameters, or
			// abort
			bool changeParameters = false;
			while (true) {
				BString line;
				_ReadLine("[c]ontinue, change [p]arameters, or [a]bort? ", line);
				if (line == "a")
					return;
				if (line == "p") {
					changeParameters = true;
					break;
				}
				if (line == "c")
					break;

				printf("invalid input\n");
//.........这里部分代码省略.........

void
MainWindow::_UpdateMenus(BDiskDevice* disk,
	partition_id selectedPartition, partition_id parentID)
{
	while (BMenuItem* item = fFormatMenu->RemoveItem(0L))
		delete item;
	while (BMenuItem* item = fDiskInitMenu->RemoveItem(0L))
		delete item;

	fCreateMI->SetEnabled(false);
	fUnmountMI->SetEnabled(false);
	fDiskInitMenu->SetEnabled(false);
	fFormatMenu->SetEnabled(false);

	if (!disk) {
		fWipeMI->SetEnabled(false);
		fEjectMI->SetEnabled(false);
		fSurfaceTestMI->SetEnabled(false);
	} else {
//		fWipeMI->SetEnabled(true);
		fWipeMI->SetEnabled(false);
		fEjectMI->SetEnabled(disk->IsRemovableMedia());
//		fSurfaceTestMI->SetEnabled(true);
		fSurfaceTestMI->SetEnabled(false);

		// Create menu and items
		BPartition* parentPartition = NULL;
		if (selectedPartition <= -2) {
			// a partitionable space item is selected
			parentPartition = disk->FindDescendant(parentID);
		}

		if (parentPartition && parentPartition->ContainsPartitioningSystem())
			fCreateMI->SetEnabled(true);

		bool prepared = disk->PrepareModifications() == B_OK;
		fFormatMenu->SetEnabled(prepared);
		fDeleteMI->SetEnabled(prepared);

		BPartition* partition = disk->FindDescendant(selectedPartition);

		BDiskSystem diskSystem;
		fDDRoster.RewindDiskSystems();
		while (fDDRoster.GetNextDiskSystem(&diskSystem) == B_OK) {
			if (!diskSystem.SupportsInitializing())
				continue;

			BMessage* message = new BMessage(MSG_INITIALIZE);
			message->AddInt32("parent id", parentID);
			message->AddString("disk system", diskSystem.PrettyName());

			BString label = diskSystem.PrettyName();
			label << B_UTF8_ELLIPSIS;
			BMenuItem* item = new BMenuItem(label.String(), message);

			// TODO: Very unintuitive that we have to use PrettyName (vs Name)
			item->SetEnabled(partition != NULL
				&& partition->CanInitialize(diskSystem.PrettyName()));

			if (disk->ID() == selectedPartition
				&& !diskSystem.IsFileSystem()) {
				// Disk is selected, and DiskSystem is a partition map
				fDiskInitMenu->AddItem(item);
			} else if (diskSystem.IsFileSystem()) {
				// Otherwise a filesystem
				fFormatMenu->AddItem(item);
			}
		}

		// Mount items
		if (partition) {
			fFormatMenu->SetEnabled(!partition->IsMounted()
				&& !partition->IsReadOnly()
				&& partition->Device()->HasMedia()
				&& fFormatMenu->CountItems() > 0);

			fDiskInitMenu->SetEnabled(!partition->IsMounted()
				&& !partition->IsReadOnly()
				&& partition->Device()->HasMedia()
				&& partition->IsDevice()
				&& fDiskInitMenu->CountItems() > 0);

			fDeleteMI->SetEnabled(!partition->IsMounted()
				&& !partition->IsDevice());

			fMountMI->SetEnabled(!partition->IsMounted());

			bool unMountable = false;
			if (partition->IsMounted()) {
				// see if this partition is the boot volume
				BVolume volume;
				BVolume bootVolume;
				if (BVolumeRoster().GetBootVolume(&bootVolume) == B_OK
					&& partition->GetVolume(&volume) == B_OK) {
					unMountable = volume != bootVolume;
				} else
					unMountable = true;
			}
			fUnmountMI->SetEnabled(unMountable);
		} else {
//.........这里部分代码省略.........