DiskUsage enhancement (ticket #3520)

* the volume are now displayed in tabs, mounting and unmounting volume adds and remove tabs accordingly
 * the infos (file size, etc..) are now displayed below the graph
 * node monitoring tells you when your current view is outdated. (the ticket suggested to adjust the view automatically, but I'll wait for comments on this first).
 * Drag&Dropping a file on the graph changes the tabview to the tab representing the volume owning that file.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38958 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/diskusage/App.cpp

@@ -90,6 +90,7 @@ App::ReadyToRun()
 	}
 
 	fMainWindow = new MainWindow(frame);
+	fMainWindow->Show();
 
 	if (fSavedRefsReceived) {
 		// RefsReceived() was called earlier than ReadyToRun()

src/apps/diskusage/Common.cpp

@@ -78,6 +78,7 @@ read_resources(const char* appSignature)
 	kVolMenuLabel = LoadString("STR_VM_LABEL");
 	kOneFile = LoadString("STR_1_FILE");
 	kManyFiles = LoadString("STR_N_FILES");
+	kStrScan = LoadString("STR_SCAN");
 	kStrRescan = LoadString("STR_RESCAN");
 	kStrScanningX = LoadString("STR_SCN_X");
 	kStrUnavail = LoadString("STR_UNAVAIL");
@@ -94,6 +95,7 @@ read_resources(const char* appSignature)
 	kInfoTimeFmt = LoadString("STR_TIMEFMT");
 	kInfoKind = LoadString("STR_KIND");
 	kInfoPath = LoadString("STR_PATH");
+	kOutdatedStr = LoadString("STR_OUTDATED");
 
 	kWindowColor = ui_color(B_PANEL_BACKGROUND_COLOR);
 	kOutlineColor = LoadColor("RGB_PIE_OL");

src/apps/diskusage/Common.h

@@ -28,7 +28,9 @@
 
 
 // Resources
+EXTERN char* kStrScan;
 EXTERN char* kStrRescan;
+EXTERN char* kOutdatedStr;
 EXTERN char* kStrScanningX;
 EXTERN char* kStrUnavail;
 EXTERN char* kVolMenuLabel;
@@ -93,6 +95,7 @@ EXTERN bool kFoundHelpFile;
 #define kScanRefresh				'gSRF'
 #define kScanProgress				'gSPR'
 #define kScanDone					'gSDN'
+#define kOutdatedMsg				'gOUT'
 
 #define deg2rad(x) (2.0 * M_PI * (x) / 360.0)
 #define rad2deg(x) (360.0 * (x) / (2.0 * M_PI))

src/apps/diskusage/ControlsView.cpp

@@ -12,47 +12,44 @@
 
 #include <Bitmap.h>
 #include <Box.h>
-#include <MenuField.h>
-#include <MenuItem.h>
+#include <TabView.h>
 #include <NodeMonitor.h>
+#include <Path.h>
 #include <PopUpMenu.h>
 #include <SupportDefs.h>
 #include <Volume.h>
 #include <VolumeRoster.h>
 #include <Window.h>
 
+#include <LayoutBuilder.h>
+
 #include "Common.h"
+#include "VolumeView.h"
 
 
-class VolumeMenuItem: public BMenuItem {
+class VolumeTab: public BTab {
 public:
-						VolumeMenuItem(BVolume* volume, BMessage* message);
-	virtual				~VolumeMenuItem();
+								VolumeTab(BVolume* volume);
+	virtual						~VolumeTab();
 
-	virtual	void		GetContentSize(float* width, float* height);
-	virtual	void		DrawContent();
+			BVolume*			Volume() const
+									{ return fVolume; }
+			float				IconWidth() const;
 
-			BVolume*	Volume() const
-							{ return fVolume; }
-			status_t	Invoke(BMessage* mesage = NULL)
-							{ return BMenuItem::Invoke(); }
+	virtual	void				DrawLabel(BView* owner, BRect frame);
 
 private:
-			BBitmap*	fIcon;
-			BVolume*	fVolume;
+			BBitmap*			fIcon;
+			BVolume*			fVolume;
 };
 
 
-VolumeMenuItem::VolumeMenuItem(BVolume* volume, BMessage* message)
+VolumeTab::VolumeTab(BVolume* volume)
 	:
-	BMenuItem(kEmptyStr, message),
+	BTab(),
 	fIcon(new BBitmap(BRect(0, 0, 15, 15), B_RGBA32)),
 	fVolume(volume)
 {
-	char name[B_PATH_NAME_LENGTH];
-	fVolume->GetName(name);
-	SetLabel(name);
-
 	if (fVolume->GetIcon(fIcon, B_MINI_ICON) < B_OK) {
 		delete fIcon;
 		fIcon = NULL;
@@ -60,53 +57,56 @@ VolumeMenuItem::VolumeMenuItem(BVolume* volume, BMessage* message)
 }
 
 
-VolumeMenuItem::~VolumeMenuItem()
+float
+VolumeTab::IconWidth() const
+{
+	if (fIcon != NULL)
+		// add a small margin
+		return fIcon->Bounds().Width() + kSmallHMargin;
+	else
+		return 0.0f;
+}
+
+
+void
+VolumeTab::DrawLabel(BView* owner, BRect frame)
+{
+	owner->SetDrawingMode(B_OP_OVER);
+	if (fIcon != NULL) {
+		owner->MovePenTo(frame.left + kSmallHMargin,
+			(frame.top + frame.bottom - fIcon->Bounds().Height()) / 2.0);
+		owner->DrawBitmap(fIcon);
+	}
+
+	font_height fh;
+	owner->GetFontHeight(&fh);
+
+	owner->SetHighColor(ui_color(B_CONTROL_TEXT_COLOR));
+	owner->DrawString(Label(),
+		BPoint(frame.left + IconWidth() + kSmallHMargin,
+			(frame.top + frame.bottom - fh.ascent - fh.descent) / 2.0
+				+ fh.ascent));
+}
+
+
+VolumeTab::~VolumeTab()
 {
 	delete fIcon;
 	delete fVolume;
 }
 
 
-void
-VolumeMenuItem::GetContentSize(float* width, float* height)
-{
-	*width = be_plain_font->StringWidth(Label());
-
-	struct font_height fh;
-	be_plain_font->GetHeight(&fh);
-	float fontHeight = fh.ascent + fh.descent + fh.leading;
-	if (fIcon) {
-		*height = max_c(fontHeight, fIcon->Bounds().Height());
-		*width += fIcon->Bounds().Width() + kSmallHMargin;
-	} else
-		*height = fontHeight;
-}
-
-
-void
-VolumeMenuItem::DrawContent()
-{
-	if (fIcon) {
-		Menu()->SetDrawingMode(B_OP_OVER);
-		Menu()->MovePenBy(0.0, -1.0);
-		Menu()->DrawBitmap(fIcon);
-		Menu()->SetDrawingMode(B_OP_COPY);
-		Menu()->MovePenBy(fIcon->Bounds().Width() + kSmallHMargin, 0.0);
-	}
-	BMenuItem::DrawContent();
-}
-
-
 // #pragma mark -
 
 
-class ControlsView::VolumePopup: public BMenuField {
+class ControlsView::VolumeTabView: public BTabView {
 public:
-								VolumePopup(BRect r);
-	virtual						~VolumePopup();
+								VolumeTabView();
+	virtual						~VolumeTabView();
 
 	virtual	void				AttachedToWindow();
 	virtual	void				MessageReceived(BMessage* message);
+	virtual BRect				TabFrame(int32 index) const;
 
 			BVolume*			FindDeviceFor(dev_t device,
 									bool invoke = false);
@@ -119,16 +119,40 @@ private:
 };
 
 
-ControlsView::VolumePopup::VolumePopup(BRect r)
+ControlsView::VolumeTabView::VolumeTabView()
 	:
-	BMenuField(r, NULL, kVolMenuLabel, new BPopUpMenu(kVolMenuDefault), false,
-		B_FOLLOW_LEFT)
+	BTabView("volume_tabs", B_WIDTH_FROM_LABEL)
 {
-	SetViewColor(kWindowColor);
-	SetLowColor(kWindowColor);
+}
 
-	SetDivider(kSmallHMargin + StringWidth(kVolMenuLabel));
 
+ControlsView::VolumeTabView::~VolumeTabView()
+{
+	fVolumeRoster->StopWatching();
+	delete fVolumeRoster;
+}
+
+
+BRect
+ControlsView::VolumeTabView::TabFrame(int32 index) const
+{
+	float height = BTabView::TabFrame(index).Height();
+	float x = 0.0f;
+	for (int32 i = 0; i < index; i++) {
+		x += StringWidth(TabAt(i)->Label()) + 3.0f * kSmallHMargin
+			+ ((VolumeTab*)TabAt(i))->IconWidth();
+	}
+
+	return BRect(x, 0.0f,
+		x + StringWidth(TabAt(index)->Label()) + 3.0f * kSmallHMargin
+			+ ((VolumeTab*)TabAt(index))->IconWidth(),
+		height);
+}
+
+
+void
+ControlsView::VolumeTabView::AttachedToWindow()
+{
 	// Populate the menu with the persistent volumes.
 	fVolumeRoster = new BVolumeRoster();
 
@@ -136,32 +160,20 @@ ControlsView::VolumePopup::VolumePopup(BRect r)
 	while (fVolumeRoster->GetNextVolume(&tempVolume) == B_OK) {
 		if (tempVolume.IsPersistent()) {
 			BVolume* volume = new BVolume(tempVolume);
-			BMessage* message = new BMessage(kMenuSelectVol);
-			message->AddPointer(kNameVolPtr, volume);
-			VolumeMenuItem *item = new VolumeMenuItem(volume, message);
-			Menu()->AddItem(item);
+			VolumeTab *item = new VolumeTab(volume);
+			char name[B_PATH_NAME_LENGTH];
+			volume->GetName(name);			
+			AddTab(new VolumeView(name, volume), item);
 		}
 	}
-}
 
-
-ControlsView::VolumePopup::~VolumePopup()
-{
-	fVolumeRoster->StopWatching();
-	delete fVolumeRoster;
-}
-
-
-void
-ControlsView::VolumePopup::AttachedToWindow()
-{
 	// Begin watching mount and unmount events.
 	fVolumeRoster->StartWatching(BMessenger(this));
 }
 
 
 void
-ControlsView::VolumePopup::MessageReceived(BMessage* message)
+ControlsView::VolumeTabView::MessageReceived(BMessage* message)
 {
 	switch (message->what) {
 		case B_NODE_MONITOR:
@@ -176,24 +188,50 @@ ControlsView::VolumePopup::MessageReceived(BMessage* message)
 			}
 			break;
 
+		case kBtnRescan:
+			ViewForTab(Selection())->MessageReceived(message);
+			break;
+
+		case B_SIMPLE_DATA:
+		case B_REFS_RECEIVED:
+		{
+			entry_ref ref;
+
+			for (int i = 0; message->FindRef("refs", i, &ref) == B_OK; i++) {
+				BEntry entry(&ref, true);
+				BPath path;
+				entry.GetPath(&path);
+				dev_t device = dev_for_path(path.Path());
+
+				for (int j = 0; VolumeTab* item = (VolumeTab*)TabAt(j); j++) {
+					if (item->Volume()->Device() == device) {
+						Select(j);
+						((VolumeView*)(item->View()))->SetPath(path);
+						break;
+					}
+				}
+			}
+			break;
+		}
+
 		default:
-			BMenuField::MessageReceived(message);
+			BTabView::MessageReceived(message);
 			break;
 	}
 }
 
 
 BVolume*
-ControlsView::VolumePopup::FindDeviceFor(dev_t device, bool invoke)
+ControlsView::VolumeTabView::FindDeviceFor(dev_t device, bool invoke)
 {
 	BVolume* volume = NULL;
 
 	// Iterate through items looking for a BVolume representing this device.
-	for (int i = 0; VolumeMenuItem* item = (VolumeMenuItem*)Menu()->ItemAt(i); i++) {
+	for (int i = 0; VolumeTab* item = (VolumeTab*)TabAt(i); i++) {
 		if (item->Volume()->Device() == device) {
 			volume = item->Volume();
 			if (invoke)
-				item->Invoke();
+				Select(i);
 			break;
 		}
 	}
@@ -203,43 +241,36 @@ ControlsView::VolumePopup::FindDeviceFor(dev_t device, bool invoke)
 
 
 void
-ControlsView::VolumePopup::_AddVolume(dev_t device)
+ControlsView::VolumeTabView::_AddVolume(dev_t device)
 {
 	// Make sure the volume is not already in the menu.
-	for (int i = 0; i < Menu()->CountItems(); i++) {
-		VolumeMenuItem* item = (VolumeMenuItem*)Menu()->ItemAt(i);
+	for (int i = 0; VolumeTab* item = (VolumeTab*)TabAt(i); i++) {
 		if (item->Volume()->Device() == device)
 			return;
 	}
 
-	// Add the newly mounted volume to the menu.
 	BVolume* volume = new BVolume(device);
-	BMessage* message = new BMessage(kMenuSelectVol);
-	message->AddPointer(kNameVolPtr, volume);
-	VolumeMenuItem* item = new VolumeMenuItem(volume, message);
-	Menu()->AddItem(item);
+
+	VolumeTab* item = new VolumeTab(volume);
+	char name[B_PATH_NAME_LENGTH];
+	volume->GetName(name);
+
+	AddTab(new VolumeView(name, volume), item);
+	Invalidate();
 }
 
 
 void
-ControlsView::VolumePopup::_RemoveVolume(dev_t device)
+ControlsView::VolumeTabView::_RemoveVolume(dev_t device)
 {
-	for (int i = 0; i < Menu()->CountItems(); i++) {
-		VolumeMenuItem* item = (VolumeMenuItem*)Menu()->ItemAt(i);
+	for (int i = 0; VolumeTab* item = (VolumeTab*)TabAt(i); i++) {
 		if (item->Volume()->Device() == device) {
-			// If the volume being removed is currently selected, prompt for a
-			// different volume.
-			if (item->IsMarked()) {
-				// update the displayed volume label now that there is no marked
-				// item:
-				Menu()->Superitem()->SetLabel(kVolMenuDefault);
-
-				BMessage messae(kMenuSelectVol);
-				messae.AddPointer(kNameVolPtr, NULL);
-				Window()->PostMessage(&messae);
-			}
-
-			Menu()->RemoveItem(item);
+			if (i == 0)
+				Select(1);
+			else
+				Select(i - 1);
+			RemoveTab(i);
+			delete item;
 			return;
 		}
 	}
@@ -249,43 +280,34 @@ ControlsView::VolumePopup::_RemoveVolume(dev_t device)
 // #pragma mark -
 
 
-ControlsView::ControlsView(BRect r)
-	: BView(r, NULL, B_FOLLOW_LEFT_RIGHT, 0)
+ControlsView::ControlsView()
+	:
+	BView(NULL, B_WILL_DRAW)
 {
-	SetViewColor(kWindowColor);
+	SetLayout(new BGroupLayout(B_VERTICAL));
+	fVolumeTabView = new VolumeTabView();
+	AddChild(BLayoutBuilder::Group<>(B_VERTICAL)
+		.Add(fVolumeTabView)
+	);
+}
 
-	r.top += kSmallVMargin;
-	r.right -= kSmallHMargin;
-	float buttonWidth = kButtonMargin + StringWidth(kHelpBtnLabel);
-	r.left = r.right - buttonWidth;
-	BButton* helpButton = new BButton(r, NULL, kHelpBtnLabel, new BMessage(kBtnHelp),
-		B_FOLLOW_RIGHT);
-	if (!kFoundHelpFile)
-		helpButton->SetEnabled(false);
 
-	r.right = r.left - kSmallHMargin;
-	buttonWidth = kButtonMargin + StringWidth(kStrRescan);
-	r.left = r.right - max_c(kMinButtonWidth, buttonWidth);
-	fRescanButton = new BButton(r, NULL, kStrRescan, new BMessage(kBtnRescan),
-		B_FOLLOW_RIGHT);
+void
+ControlsView::MessageReceived(BMessage* msg)
+{
+	switch (msg->what) {
+		case B_SIMPLE_DATA:
+		case B_REFS_RECEIVED:
+			fVolumeTabView->MessageReceived(msg);
+			break;
 
-	fVolumePopup = new VolumePopup(
-		BRect(kSmallHMargin, kSmallVMargin, r.left - kSmallHMargin, kSmallVMargin));
+		case kBtnRescan:
+			fVolumeTabView->MessageReceived(msg);
+			break;
 
-	float width, height;
-	fRescanButton->GetPreferredSize(&width, &height);
-	ResizeTo(Bounds().Width(), height + 6.0);
-
-	// Horizontal divider
-	r = Bounds();
-	r.top = r.bottom - 1.0;
-	r.left -= 5.0; r.right += 5.0;
-	BBox* divider = new BBox(r, NULL, B_FOLLOW_LEFT_RIGHT, B_WILL_DRAW);
-
-	AddChild(fVolumePopup);
-	AddChild(divider);
-	AddChild(fRescanButton);
-	AddChild(helpButton);
+		default:
+			BView::MessageReceived(msg);
+	}
 }
 
 
@@ -294,8 +316,24 @@ ControlsView::~ControlsView()
 }
 
 
+void
+ControlsView::ShowInfo(const FileInfo* info)
+{
+	((VolumeView*)fVolumeTabView->ViewForTab(
+		fVolumeTabView->Selection()))->ShowInfo(info);
+}
+
+
+void
+ControlsView::SetRescanEnabled(bool enabled)
+{
+	((VolumeView*)fVolumeTabView->ViewForTab(
+		fVolumeTabView->Selection()))->SetRescanEnabled(enabled);
+}
+
+
 BVolume*
 ControlsView::FindDeviceFor(dev_t device, bool invoke)
 {
-	return fVolumePopup->FindDeviceFor(device, invoke);
+	return fVolumeTabView->FindDeviceFor(device, invoke);
 }

src/apps/diskusage/ControlsView.h

@@ -9,29 +9,32 @@
 #ifndef CONTROLS_VIEW_H
 #define CONTROLS_VIEW_H
 
-
 #include <Button.h>
 #include <View.h>
 
 
+class BMessage;
 class BVolume;
 
+struct FileInfo;
+
 class ControlsView: public BView {
 public:
-								ControlsView(BRect r);
+								ControlsView();
 	virtual						~ControlsView();
 
-			void				SetRescanEnabled(bool enable)
-									{ fRescanButton->SetEnabled(enable); }
+	virtual	void				MessageReceived(BMessage* msg);
 
 			BVolume*			FindDeviceFor(dev_t device,
 									bool invoke = false);
-			
-private:
-			class				VolumePopup;
 
-			VolumePopup*		fVolumePopup; 
-			BButton*			fRescanButton;
+			void				SetRescanEnabled(bool enabled);
+			void				ShowInfo(const FileInfo* info);
+
+private:
+			class 				VolumeTabView;
+
+			VolumeTabView*		fVolumeTabView;
 };
 
 

src/apps/diskusage/DiskUsage.rdef

@@ -62,6 +62,7 @@ resource(101, "N_PIE_COLORS") (uint8)4;
 resource(103, "STR_N_FILES") "%d files";
 resource(102, "STR_1_FILE") "%d file";
 resource(101, "STR_VM_LABEL") "Volume:";
+resource(120, "STR_SCAN") "Scan";
 resource(104, "STR_RESCAN") "Rescan";
 resource(105, "STR_SCN_X") "Scanning ";
 resource(106, "STR_UNAVAIL") "file unavailable";
@@ -78,4 +79,4 @@ resource(116, "STR_MOD") "Modified";
 resource(117, "STR_TIMEFMT") "%a, %d %b %Y, %r";
 resource(118, "STR_KIND") "Kind";
 resource(119, "STR_PATH") "Path";
-
+resource(121, "STR_OUTDATED") "Outdated view";

src/apps/diskusage/Jamfile

@@ -1,6 +1,6 @@
 SubDir HAIKU_TOP src apps diskusage ;
 
-UsePrivateHeaders mount shared tracker ;
+UsePrivateHeaders mount shared tracker storage ;
 SubDirHdrs $(HAIKU_TOP) src kits tracker ;
 
 Application DiskUsage :
@@ -14,6 +14,7 @@ Application DiskUsage :
 	Scanner.cpp
 	Snapshot.cpp
 	StatusView.cpp
+	VolumeView.cpp
 	: be $(TARGET_LIBSTDC++)
 	: DiskUsage.rdef
 ;

src/apps/diskusage/MainWindow.cpp

@@ -7,8 +7,6 @@
  * as long as it is accompanied by it's documentation and this copyright notice.
  * The software comes with no warranty, etc.
  */
-
-
 #include "MainWindow.h"
 
 #include <Application.h>
@@ -16,58 +14,28 @@
 #include <Roster.h>
 #include <Screen.h>
 
+#include <LayoutBuilder.h>
+
 #include "Common.h"
 #include "ControlsView.h"
-#include "PieView.h"
-#include "StatusView.h"
-
-
-const float kMinWinSize = 275.0;
 
 
 MainWindow::MainWindow(BRect pieRect)
 	:
 	BWindow(pieRect, "DiskUsage", B_TITLED_WINDOW,
-		B_ASYNCHRONOUS_CONTROLS | B_QUIT_ON_WINDOW_CLOSE)
+		B_ASYNCHRONOUS_CONTROLS | B_QUIT_ON_WINDOW_CLOSE
+		| B_AUTO_UPDATE_SIZE_LIMITS)
 {
-	BRect r = Bounds();
-	r.bottom = r.top + 1.0;
-	fControlsView = new ControlsView(r);
-	float cvHeight = fControlsView->Bounds().Height();
-	AddChild(fControlsView);
+	fControlsView = new ControlsView();
 
-	r = Bounds();
-	r.top = r.bottom - 1.0;
-	fStatusView = new StatusView(r);
-	float svHeight = fStatusView->Bounds().Height();
+	SetLayout(new BGroupLayout(B_VERTICAL));
 
-	float winHeight = pieRect.Height() + cvHeight + svHeight;
-	fStatusView->MoveTo(0.0, winHeight - svHeight);
-	ResizeTo(r.Width(), winHeight);
-
-	AddChild(fStatusView);
-
-	r = fControlsView->Frame();
-	r.top = r.bottom + 1.0;
-	r.bottom = fStatusView->Frame().top - 1.0;
-	fPieView = new PieView(r, this);
-	AddChild(fPieView);
-
-	Show();
-
-	// Note: The following code is semi-broken because BScreen::Frame()
-	// returns incorrect dimensions for the G200 in 1152x864 mode.  I reported
-	// this bug, and Be said it's not a bug -- the Matrox driver actually uses
-	// a resolution of 1152x900 in that mode.  Oh well.
-	Lock();
-	float extraHeight = fControlsView->Bounds().Height()
-		+ fStatusView->Bounds().Height();
-	float minHeight = kMinWinSize + extraHeight;
-	float maxHeight = BScreen(this).Frame().Height();
-	float maxWidth = maxHeight - extraHeight;
-	Unlock();
-
-	SetSizeLimits(kMinWinSize, maxWidth, minHeight, maxHeight);
+	AddChild(BLayoutBuilder::Group<>(B_VERTICAL)
+		.Add(fControlsView)
+		.SetInsets(5, 5, 5, 5)
+	);
+	float maxHeight = BScreen(this).Frame().Height() - 12;
+	fControlsView->SetExplicitMaxSize(BSize(maxHeight, maxHeight));
 }
 
 
@@ -81,9 +49,11 @@ MainWindow::MessageReceived(BMessage* message)
 {
 	switch (message->what) {
 		case kBtnRescan:
-		case kMenuSelectVol:
+			fControlsView->MessageReceived(message);
+			break;
+		case B_SIMPLE_DATA:
 		case B_REFS_RECEIVED:
-			fPieView->MessageReceived(message);
+			fControlsView->MessageReceived(message);
 			break;
 
 		case kBtnHelp:
@@ -109,16 +79,16 @@ MainWindow::QuitRequested()
 
 
 void
-MainWindow::ShowInfo(const FileInfo* info)
+MainWindow::SetRescanEnabled(bool enabled)
 {
-	fStatusView->ShowInfo(info);
+	fControlsView->SetRescanEnabled(enabled);
 }
 
 
 void
-MainWindow::SetRescanEnabled(bool enabled)
+MainWindow::ShowInfo(const FileInfo* info)
 {
-	fControlsView->SetRescanEnabled(enabled);
+	fControlsView->ShowInfo(info);
 }
 
 

src/apps/diskusage/MainWindow.h

@@ -10,7 +10,6 @@
 #ifndef MAIN_WINDOW_H
 #define MAIN_WINDOW_H
 
-
 #include <Window.h>
 
 
@@ -18,8 +17,6 @@ class BVolume;
 class ControlsView;
 struct FileInfo;
 class PieView;
-class StatusView;
-
 
 class MainWindow: public BWindow {
 public:
@@ -29,15 +26,14 @@ public:
 	virtual	void				MessageReceived(BMessage* message);
 	virtual	bool				QuitRequested();
 
-			void				ShowInfo(const FileInfo* info);
 			void				SetRescanEnabled(bool enabled);
 			BVolume*			FindDeviceFor(dev_t device,
 									bool invoke = false);
 
+			void				ShowInfo(const FileInfo* info);
+
 private:
 			ControlsView*		fControlsView;
-			PieView*			fPieView;
-			StatusView*			fStatusView;
 };
 
 #endif // MAIN_WINDOW_H

src/apps/diskusage/PieView.cpp

@@ -14,7 +14,6 @@
 #include <fs_info.h>
 #include <math.h>
 
-#include <Alert.h>
 #include <AppFileInfo.h>
 #include <Bitmap.h>
 #include <Entry.h>
@@ -41,8 +40,6 @@ static const int32 kIdxOpen = 1;
 static const int32 kIdxOpenWith = 2;
 static const int32 kIdxRescan = 3;
 
-// TODO: It would be nice to make a common base class for AppMenuItem and
-// VolMenuItem (menu items that include an icon).
 
 class AppMenuItem : public BMenuItem {
 public:
@@ -125,20 +122,17 @@ AppMenuItem::DrawContent()
 // #pragma mark - PieView
 
 
-PieView::PieView(BRect frame, MainWindow* window)
+PieView::PieView(BVolume* volume)
 	:
-	BView(frame, NULL, B_FOLLOW_ALL,
-		B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE | B_SUBPIXEL_PRECISE),
-	fWindow(window),
-	fScanners(),
-	fCurrentVolume(NULL),
+	BView(NULL, B_WILL_DRAW | B_FULL_UPDATE_ON_RESIZE | B_SUBPIXEL_PRECISE),
+	fWindow(NULL),
+	fScanner(NULL),
+	fVolume(volume),
 	fMouseOverInfo(),
 	fClicked(false),
-	fDragging(false)
+	fDragging(false),
+	fOutdated(false)
 {
-	SetViewColor(B_TRANSPARENT_COLOR);
-	SetLowColor(kWindowColor);
-
 	fMouseOverMenu = new BPopUpMenu(kEmptyStr, false, false);
 	fMouseOverMenu->AddItem(new BMenuItem(kMenuGetInfo, NULL), kIdxGetInfo);
 	fMouseOverMenu->AddItem(new BMenuItem(kMenuOpen, NULL), kIdxOpen);
@@ -160,16 +154,19 @@ PieView::PieView(BRect frame, MainWindow* window)
 }
 
 
+void
+PieView::AttachedToWindow()
+{
+	fWindow = (MainWindow*)Window();
+}
+
+
 PieView::~PieView()
 {
 	delete fMouseOverMenu;
 	delete fFileUnavailableMenu;
-
-	while (fScanners.size() != 0) {
-		ScannerMap::iterator i = fScanners.begin();
-		(*i).second->RequestQuit();
-		fScanners.erase(i);
-	}
+	if (fScanner != NULL)
+		fScanner->RequestQuit();
 }
 
 
@@ -177,41 +174,31 @@ void
 PieView::MessageReceived(BMessage* message)
 {
 	switch (message->what) {
-		case B_SIMPLE_DATA:
-		case B_REFS_RECEIVED:
-		{
-			entry_ref ref;
-			for (int i = 0; message->FindRef("refs", i, &ref) == B_OK; i++) {
-				BEntry entry(&ref, true);
-				_HandleArg(&entry);
-			}
-			break;
-		}
-
 		case kBtnRescan:
-			if (fCurrentVolume != NULL) {
-				fScanners[fCurrentVolume]->Refresh();
+			if (fVolume != NULL) {
+				if (fScanner != NULL)
+					fScanner->Refresh();
+				else
+					_ShowVolume(fVolume);
+
+				fOutdated = false;
 				Invalidate();
 			}
 			break;
 
-		case kMenuSelectVol:
-		{
-			BVolume* volume;
-			if (message->FindPointer(kNameVolPtr, (void**)&volume) == B_OK)
-				_ShowVolume(volume);
-			break;
-		}
-
 		case kScanProgress:
 		case kScanDone:
 		{
-			BVolume* volume;
-			if (message->FindPointer(kNameVolPtr, (void**)&volume) == B_OK
-				&& volume == fCurrentVolume) {
+			Invalidate();
+			break;
+		}
+
+		case kOutdatedMsg:
+		{			
+			if (!fScanner->IsBusy()) {
+				fOutdated = true;
 				Invalidate();
 			}
-			break;
 		}
 
 		default:
@@ -251,14 +238,15 @@ PieView::MouseUp(BPoint where)
 	// If the primary button was released and there was no dragging happening,
 	// just zoom in or out.
 	if (fClicked && !fDragging) {
-		Scanner* scanner = fScanners[fCurrentVolume];
 		FileInfo* info = _FileAt(where);
 		if (info != NULL) {
-			if (info == scanner->CurrentDir()) {
-				scanner->ChangeDir(info->parent);
+			if (info == fScanner->CurrentDir()) {
+				fScanner->ChangeDir(info->parent);
+				fOutdated = fScanner->IsOutdated();
 				Invalidate();
 			} else if (info->children.size() > 0) {
-				scanner->ChangeDir(info);
+				fScanner->ChangeDir(info);
+				fOutdated = fScanner->IsOutdated();
 				Invalidate();
 			}
 		}
@@ -307,27 +295,32 @@ PieView::MouseMoved(BPoint where, uint32 transit, const BMessage* dragMessage)
 void
 PieView::Draw(BRect updateRect)
 {
-	if (fScanners.find(fCurrentVolume) != fScanners.end()) {
+	if (fScanner != NULL) {
 		// There is a current volume.
-		Scanner* scanner = fScanners[fCurrentVolume];
-		if (scanner->IsBusy()) {
+		if (fScanner->IsBusy()) {
 			// Show progress of scanning.
 			_DrawProgressBar(updateRect);
-			fWindow->SetRescanEnabled(false);
+			if (fWindow != NULL)
+				fWindow->SetRescanEnabled(false);
 		} else {
 			_DrawPieChart(updateRect);
-			fWindow->SetRescanEnabled(true);
+			if (fWindow != NULL)
+				fWindow->SetRescanEnabled(true);
 		}
-	} else {
-		// No volume has been selected, so display a prompt for one.
-		FillRect(updateRect, B_SOLID_LOW);
-		BRect b = Bounds();
-		float strWidth = StringWidth(kVolPrompt);
-		float bx = (b.left + b.Width() - strWidth) / 2.0;
-		float by = (b.top + b.Height()) / 2.0;
-		SetHighColor(0x00, 0x00, 0x00);
-		DrawString(kVolPrompt, BPoint(bx, by));
-		fWindow->SetRescanEnabled(false);
+	}
+}
+
+
+void
+PieView::SetPath(BPath path)
+{
+	if (fScanner == NULL)
+		_ShowVolume(fVolume);
+
+	if (fScanner != NULL) {
+		string desiredPath(path.Path());
+		fScanner->SetDesiredPath(desiredPath);
+		Invalidate();
 	}
 }
 
@@ -335,57 +328,17 @@ PieView::Draw(BRect updateRect)
 // #pragma mark - private
 
 
-void
-PieView::_HandleArg(const BEntry* entry)
-{
-	// Going through these seemingly pointless gyrations (instead of getting
-	// the dev_t directly from the BEntry) allows us to process volumes
-	// properly.  It looks like a dropped volume refers to dev_t 1 (why?), but
-	// getting the dev_t from the path allows us to get at the dev_t where the
-	// root directory actually lives.
-	BPath path;
-	entry->GetPath(&path);
-	dev_t device = dev_for_path(path.Path());
-
-	// Set the desired path in the scanner.
-	Scanner* scanner = NULL;
-	ScannerMap::iterator i = fScanners.begin();
-	while (i != fScanners.end()) {
-		if ((*i).second->Device() == device) {
-			scanner = (*i).second;
-			break;
-		}
-		i++;
-	}
-
-	if (scanner == NULL) {
-		BVolume* volume = fWindow->FindDeviceFor(device);
-		if (volume != NULL)
-			scanner = fScanners[volume] = new Scanner(volume, this);
-	}
-	if (scanner != NULL) {
-		string desiredPath(path.Path());
-		scanner->SetDesiredPath(desiredPath);
-
-		// Select the volume on the menu.
-		fWindow->FindDeviceFor(device, true);
-	}
-}
-
-
 void
 PieView::_ShowVolume(BVolume* volume)
 {
 	if (volume != NULL) {
-		if (fScanners.find(volume) == fScanners.end())
-			fScanners[volume] = new Scanner(volume, this);
-
-		Scanner* scanner = fScanners[volume];
-		if (scanner->Snapshot() == NULL)
-			scanner->Refresh();
+		if (fScanner == NULL)
+			fScanner = new Scanner(volume, this);
+		
+		if (fScanner->Snapshot() == NULL)
+			fScanner->Refresh();
 	}
 
-	fCurrentVolume = volume;
 	Invalidate();
 }
 
@@ -416,7 +369,7 @@ PieView::_DrawProgressBar(BRect updateRect)
 	bx += 1.0; by += 1.0;
 	ex -= 1.0; ey -= 1.0;
 	float mx = bx + floorf((kProgBarWidth - 2.0)
-		* fScanners[fCurrentVolume]->Progress() / 100.0 + 0.5);
+		* fScanner->Progress() / 100.0 + 0.5);
 	SetHighColor(tint_color(kWindowColor, B_DARKEN_1_TINT));
 	FillRect(BRect(mx, by, ex, ey));
 
@@ -433,7 +386,7 @@ PieView::_DrawProgressBar(BRect updateRect)
 	FillRect(BRect(bx, by, mx, ey));
 
 	// Tell what we are doing.
-	const char* task = fScanners[fCurrentVolume]->Task();
+	const char* task = fScanner->Task();
 	float strWidth = StringWidth(task);
 	bx = (b.left + b.Width() - strWidth) / 2.0;
 	by -= fFontHeight + 2.0 * kSmallVMargin;
@@ -465,7 +418,7 @@ PieView::_DrawPieChart(BRect updateRect)
 		pieRect.bottom += moveBy;
 	}
 	int colorIdx = 0;
-	FileInfo* currentDir = fScanners[fCurrentVolume]->CurrentDir();
+	FileInfo* currentDir = fScanner->CurrentDir();
 	FileInfo* parent = currentDir;
 	while (parent != NULL) {
 		parent = parent->parent;
@@ -473,16 +426,21 @@ PieView::_DrawPieChart(BRect updateRect)
 	}
 	_DrawDirectory(pieRect, currentDir, 0.0, 0.0, colorIdx % kBasePieColorCount,
 		0);
+	
+	if (fOutdated) {
+		
+		BRect b = Bounds();		
 
-	// This is just for the case when the mouse hovers over the view
-	// while the scanning process is running and then does not move
-	// until after the results are shown. In that case the info will
-	// not automatically update. (TODO: fix this and put into MessageReceived()
-	// kScanDone - currently, fileAt() returns NULL (mouseoverinfo...))
-	BPoint where;
-	uint32 ignore;
-	GetMouse(&where, &ignore, false);
-	fWindow->ShowInfo(_FileAt(where));
+		float strWidth = StringWidth(kOutdatedStr);
+		float bx = (b.Width() - strWidth - kSmallHMargin);
+
+		struct font_height fh;
+		be_plain_font->GetHeight(&fh);
+
+		float by = (b.Height() - ceil(fh.descent) - kSmallVMargin);
+		SetHighColor(0x00, 0x00, 0x00);
+		DrawString(kOutdatedStr, BPoint(bx, by));
+	}
 }
 
 
@@ -500,7 +458,7 @@ PieView::_DrawDirectory(BRect b, FileInfo* info, float parentSpan,
 	else if (info != NULL)
 		info->color = colorIdx;
 
-	VolumeSnapshot* snapshot = fScanners[fCurrentVolume]->Snapshot();
+	VolumeSnapshot* snapshot = fScanner->Snapshot();
 
 	float cx = floorf(b.left + b.Width() / 2.0 + 0.5);
 	float cy = floorf(b.top + b.Height() / 2.0 + 0.5);
@@ -525,7 +483,8 @@ PieView::_DrawDirectory(BRect b, FileInfo* info, float parentSpan,
 			FillEllipse(BPoint(cx, cy), kPieCenterSize, kPieCenterSize);
 
 			SetHighColor(kBasePieColor[0]);
-			FillArc(BPoint(cx, cy), kPieCenterSize, kPieCenterSize, 0.0, mySpan);
+			FillArc(BPoint(cx, cy), kPieCenterSize, kPieCenterSize, 0.0,
+				mySpan);
 
 			// Show total volume capacity.
 			char label[B_PATH_NAME_LENGTH];
@@ -560,7 +519,8 @@ PieView::_DrawDirectory(BRect b, FileInfo* info, float parentSpan,
 
 		SetPenSize(1.0);
 		SetHighColor(kOutlineColor);
-		StrokeEllipse(BPoint(cx, cy), kPieCenterSize + 0.5, kPieCenterSize + 0.5);
+		StrokeEllipse(BPoint(cx, cy), kPieCenterSize + 0.5,
+			kPieCenterSize + 0.5);
 
 		// Show the name of the volume or directory.
 		BString label(displayName);
@@ -803,7 +763,7 @@ PieView::_ShowContextMenu(FileInfo* info, BPoint p)
 					_Launch(info);
 					break;
 				case kIdxRescan:
-					fScanners[fCurrentVolume]->Refresh(info);
+					fScanner->Refresh(info);
 					Invalidate();
 					break;
 				default: // must be "Open With" submenu
@@ -844,6 +804,7 @@ PieView::_Launch(FileInfo* info, const entry_ref* appRef)
 	}
 }
 
+
 void
 PieView::_OpenInfo(FileInfo* info, BPoint p)
 {

src/apps/diskusage/PieView.h

@@ -20,6 +20,7 @@
 class AppMenuItem;
 class BEntry;
 class BMenu;
+class BPath;
 class BPopUpMenu;
 class BVolume;
 struct entry_ref;
@@ -33,18 +34,19 @@ using std::vector;
 
 class PieView: public BView {
 public:
-								PieView(BRect frame, MainWindow* window);
+								PieView(BVolume* volume);
 	virtual						~PieView();
 
+	virtual	void				AttachedToWindow();
 	virtual	void				MessageReceived(BMessage* message);
 	virtual	void				MouseDown(BPoint where);
 	virtual	void				MouseUp(BPoint where);
 	virtual	void				MouseMoved(BPoint where, uint32 transit,
 									const BMessage* dragMessage);
 	virtual	void				Draw(BRect updateRect);
+			void				SetPath(BPath path);
 
 private:
-			void				_HandleArg(const BEntry* entry);
 			void				_ShowVolume(BVolume* volume);
 			void				_DrawProgressBar(BRect updateRect);
 			void				_DrawPieChart(BRect updateRect);
@@ -59,6 +61,7 @@ private:
 			void				_Launch(FileInfo* info,
 									const entry_ref* ref = NULL);
 			void				_OpenInfo(FileInfo* info, BPoint p);
+
 private:
 		struct Segment {
 			Segment()
@@ -76,12 +79,10 @@ private:
 		typedef vector<Segment> SegmentList;
 		typedef map<int, SegmentList> MouseOverInfo;
 
-		typedef map<BVolume*, Scanner*> ScannerMap;
-
 private:
 			MainWindow*			fWindow;
-			ScannerMap			fScanners;
-			BVolume*			fCurrentVolume;
+			Scanner*			fScanner;
+			BVolume*			fVolume;
 			FileInfo*			fCurrentDir;
 			MouseOverInfo		fMouseOverInfo;
 			BPopUpMenu*			fMouseOverMenu;
@@ -91,6 +92,7 @@ private:
 			bool				fDragging;
 			BPoint				fDragStart;
 			FileInfo*			fClickedFile;
+			bool				fOutdated;			
 };
 
 #endif // PIE_VIEW_H

src/apps/diskusage/Scanner.cpp

@@ -14,6 +14,7 @@
 #include <string.h>
 
 #include <Directory.h>
+#include <PathMonitor.h>
 
 #include "Common.h"
 
@@ -31,18 +32,27 @@ Scanner::Scanner(BVolume *v, BHandler *handler)
 	fDesiredPath(),
 	fTask(),
 	fBusy(false),
-	fQuitRequested(false)
+	fQuitRequested(false),
+	fIsWatching(false),
+	fModifiedEntries()
 {
-	fDoneMessage.AddPointer(kNameVolPtr, fVolume);
-	fProgressMessage.AddPointer(kNameVolPtr, fVolume);
-
 	Run();
 }
 
 
 Scanner::~Scanner()
 {
+	if (fIsWatching) {
+		BPrivate::BPathMonitor::StopWatching(BMessenger(this, this));
+		fIsWatching = false;
+	}
 	delete fSnapshot;
+
+	while (fModifiedEntries.size() != 0) {
+		entry_ref* entry = *fModifiedEntries.begin();
+		delete entry;
+		fModifiedEntries.erase(fModifiedEntries.begin());
+	}
 }
 
 
@@ -58,6 +68,38 @@ Scanner::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case B_PATH_MONITOR:
+		{
+			dev_t device;
+			ino_t directory;
+			const char* name = "";
+			const char* path;
+
+			if (((message->FindInt32("device", &device) != B_OK)
+					|| (message->FindInt64("directory", &directory) != B_OK)
+					|| (message->FindString("name", &name) != B_OK))
+				&& ((message->FindString("path", &path) != B_OK)
+					|| (message->FindInt32("device", &device) != B_OK)))
+				return;
+
+			entry_ref* reportedEntry;
+			if (strlen(name) > 0)
+				reportedEntry = new entry_ref(device, directory, name);
+			else {
+				BEntry entry(path);
+				reportedEntry = new entry_ref();
+				entry.GetRef(reportedEntry);
+			}
+
+			fModifiedEntries.push_back(reportedEntry);
+
+			if (IsOutdated()) {
+				BMessage msg(kOutdatedMsg);
+				fListener.SendMessage(&msg);
+			}
+
+		}
+
 		default:
 			BLooper::MessageReceived(message);
 			break;
@@ -73,6 +115,12 @@ Scanner::Refresh(FileInfo* startInfo)
 
 	fBusy = true;
 
+	while (fModifiedEntries.size() != 0) {
+		entry_ref* entry = *fModifiedEntries.begin();
+		delete entry;
+		fModifiedEntries.erase(fModifiedEntries.begin());
+	}
+
 	// Remember the current directory, if any, so we can return to it after
 	// the scanning is done.
 	if (fSnapshot != NULL && fSnapshot->currentDir != NULL)
@@ -112,9 +160,43 @@ Scanner::RequestQuit()
 }
 
 
+bool
+Scanner::IsOutdated()
+{
+	FileInfo* currentDir = (fSnapshot->currentDir != NULL ?
+		fSnapshot->currentDir : fSnapshot->rootDir);
+
+	BDirectory currentDirectory(&(currentDir->ref));
+	
+	bool isOutdated = currentDirectory.InitCheck() != B_OK;
+
+	vector<entry_ref*>::iterator i = fModifiedEntries.begin();
+	while (!isOutdated && i != fModifiedEntries.end()) {
+		BEntry entry(*i);
+		isOutdated = _DirectoryContains(currentDir, *i)
+			|| currentDirectory.Contains(&entry);
+		i++;
+	}
+	return isOutdated;
+}
+
+
 // #pragma mark - private
 
 
+bool
+Scanner::_DirectoryContains(FileInfo* currentDir, entry_ref* ref)
+{
+	vector<FileInfo*>::iterator i = currentDir->children.begin();
+	bool contains = currentDir->ref == *ref;
+	while (!contains && i != currentDir->children.end()) {
+		contains |= _DirectoryContains((*i), ref);
+		i++;
+	}
+	return contains;
+}
+
+
 void
 Scanner::_RunScan(FileInfo* startInfo)
 {
@@ -168,6 +250,16 @@ Scanner::_RunScan(FileInfo* startInfo)
 		}
 	}
 
+	if (!fIsWatching) {
+		string path;
+		fSnapshot->rootDir->GetPath(path);
+
+		BPrivate::BPathMonitor::StartWatching(path.c_str(),
+			B_WATCH_ALL | B_WATCH_RECURSIVELY, BMessenger(this, this));
+
+		fIsWatching = true;
+	}
+
 	fBusy = false;
 	_ChangeToDesired();
 	fListener.SendMessage(&fDoneMessage);

src/apps/diskusage/Scanner.h

@@ -11,6 +11,7 @@
 
 
 #include <string>
+#include <vector>
 
 #include <Looper.h>
 #include <Message.h>
@@ -49,11 +50,14 @@ public:
 			dev_t				Device() const
 									{ return fVolume->Device(); }
 			void				RequestQuit();
+			bool				IsOutdated();
 
 private:
 			void				_RunScan(FileInfo *startInfo);
 			FileInfo*			_GetFileInfo(BDirectory* dir, FileInfo* parent);
 			void				_ChangeToDesired();
+			bool				_DirectoryContains(FileInfo* currentDir,
+									entry_ref* ref);
 
 			BMessenger			fListener;
 			BMessage			fDoneMessage;
@@ -69,6 +73,10 @@ private:
 			string				fTask;
 			bool				fBusy;
 			bool				fQuitRequested;
+
+			bool				fIsWatching;
+
+			std::vector<entry_ref*>	fModifiedEntries;
 };
 
 #endif // SCANNER_H

src/apps/diskusage/StatusView.cpp

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2010 Philippe St-Pierre <stpere@gmail.com>. All rights reserved.
  * Copyright (c) 2008 Stephan Aßmus <superstippi@gmx.de>. All rights reserved.
  * Distributed under the terms of the MIT/X11 license.
  *
@@ -14,73 +15,70 @@
 #include <stdio.h>
 
 #include <Box.h>
+#include <Button.h>
 #include <Node.h>
 #include <String.h>
 #include <StringView.h>
 
+#include <LayoutBuilder.h>
+
 #include "Common.h"
 #include "Scanner.h"
 
 
-StatusView::StatusView(BRect rect)
+StatusView::StatusView()
 	:
-	BView(rect, NULL, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM, B_WILL_DRAW),
+	BView(NULL, B_WILL_DRAW),
 	fCurrentFileInfo(NULL)
 {
-	SetViewColor(kWindowColor);
+	SetViewColor(kPieBGColor);
+	SetLowColor(kPieBGColor);
 
-	struct font_height fh;
-	be_plain_font->GetHeight(&fh);
-	float plainHeight = ceilf(fh.ascent) + ceilf(fh.descent)
-		+ ceilf(fh.leading);
-	float fixedHeight = ceilf(fh.ascent) + ceilf(fh.descent)
-		+ ceilf(fh.leading);
-	ResizeTo(Bounds().Width(),
-		2.0 * kSmallVMargin + max_c(plainHeight, fixedHeight));
+	fSizeView = new BStringView(NULL, kEmptyStr);
+	fSizeView->SetExplicitMinSize(BSize(StringWidth("9999.99 GB"),
+		B_SIZE_UNSET));
+	fSizeView->SetExplicitMaxSize(BSize(StringWidth("9999.99 GB"),
+		B_SIZE_UNSET));
 
-	BRect r = Bounds();
-	r.top += kSmallVMargin;
-
-	// Size display
-	r.right -= kSmallHMargin;
-	r.left = r.right - StringWidth("9999.99 GB");
-	fSizeView = new BStringView(r, NULL, kEmptyStr,
-		B_FOLLOW_RIGHT | B_FOLLOW_TOP_BOTTOM);
-	AddChild(fSizeView);
-
-	// Vertical divider
-	r.right = r.left - kSmallHMargin;
-	r.left = r.right - 1.0;
-	AddChild(new BBox(r.InsetByCopy(0, -5), NULL,
-		B_FOLLOW_RIGHT | B_FOLLOW_TOP_BOTTOM));
-
-	// Count display
 	char testLabel[256];
 	sprintf(testLabel, kManyFiles, 999999);
-	r.right = r.left - kSmallHMargin;
-	r.left = r.right - (StringWidth(testLabel) + kSmallHMargin);
-	fCountView = new BStringView(r, NULL, kEmptyStr,
-		B_FOLLOW_RIGHT|B_FOLLOW_TOP_BOTTOM);
-	AddChild(fCountView);
 
-	// Vertical divider
-	r.right = r.left - kSmallHMargin;
-	r.left = r.right - 1.0;
-	AddChild(new BBox(r.InsetByCopy(0, -5), NULL,
-		B_FOLLOW_RIGHT | B_FOLLOW_TOP_BOTTOM));
+	fCountView = new BStringView(NULL, kEmptyStr);
+	fCountView->SetExplicitMinSize(BSize(StringWidth(testLabel), B_SIZE_UNSET));
+	fCountView->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNSET));
 
-	// Path display
-	r.right = r.left - kSmallHMargin;
-	r.left = kSmallHMargin;
-	fPathView = new BStringView(r, NULL, kEmptyStr,
-		B_FOLLOW_LEFT_RIGHT|B_FOLLOW_TOP_BOTTOM);
-	AddChild(fPathView);
+	fPathView = new BStringView(NULL, kEmptyStr);
+	fPathView->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNSET));
 
-	// Horizontal divider
-	r = Bounds();
-	r.bottom = r.top + 1.0;
-	AddChild(new BBox(r.InsetByCopy(-5, 0), NULL,
-		B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM, B_WILL_DRAW));
+	fRefreshBtn = new BButton(NULL, kStrScan, new BMessage(kBtnRescan));
+
+	fRefreshBtn->SetExplicitMaxSize(BSize(B_SIZE_UNSET, B_SIZE_UNLIMITED));
+
+	BBox* divider1 = new BBox(BRect(), B_EMPTY_STRING, B_FOLLOW_ALL_SIDES,
+		B_WILL_DRAW | B_FRAME_EVENTS, B_FANCY_BORDER);
+
+	BBox* divider2 = new BBox(BRect(), B_EMPTY_STRING, B_FOLLOW_ALL_SIDES,
+		B_WILL_DRAW | B_FRAME_EVENTS, B_FANCY_BORDER);
+
+	divider1->SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, 1));
+	divider2->SetExplicitMaxSize(BSize(1, B_SIZE_UNLIMITED));
+
+	SetLayout(new BGroupLayout(B_VERTICAL));
+
+	AddChild(BLayoutBuilder::Group<>(B_HORIZONTAL)
+		.AddGroup(B_VERTICAL)
+			.Add(fPathView)
+			.Add(divider1)
+			.AddGroup(B_HORIZONTAL)
+				.Add(fCountView)
+				.Add(divider2)
+				.Add(fSizeView)
+				.End()			
+			.End()
+		.AddStrut(kSmallHMargin)
+		.Add(fRefreshBtn)
+		.SetInsets(kSmallHMargin, kSmallVMargin, kSmallVMargin, kSmallVMargin)
+	);
 }
 
 
@@ -89,6 +87,20 @@ StatusView::~StatusView()
 }
 
 
+void
+StatusView::SetRescanEnabled(bool enabled)
+{
+	fRefreshBtn->SetEnabled(enabled);
+}
+
+
+void
+StatusView::SetBtnLabel(const char* label)
+{
+	fRefreshBtn->SetLabel(label);
+}
+
+
 void
 StatusView::ShowInfo(const FileInfo* info)
 {

src/apps/diskusage/StatusView.h

@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2010 Philippe St-Pierre <stpere@gmail.com>. All rights reserved.
  * Copyright (c) 2008 Stephan Aßmus <superstippi@gmx.de>. All rights reserved.
  * Distributed under the terms of the MIT/X11 license.
  *
@@ -9,7 +10,7 @@
 #ifndef STATUS_VIEW_H
 #define STATUS_VIEW_H
 
-
+#include <Button.h>
 #include <View.h>
 #include <StringView.h>
 #include <Rect.h>
@@ -19,17 +20,22 @@ struct FileInfo;
 
 class StatusView: public BView {
 public:
-								StatusView(BRect frame);
+								StatusView();
 	virtual						~StatusView();
 
 			void				ShowInfo(const FileInfo* info);
+			void				SetBtnLabel(const char* label);
+			void				SetRescanEnabled(bool enabled);
 
 private:
 			BStringView*		fPathView;
 			BStringView*		fSizeView;
 			BStringView*		fCountView;
 			const FileInfo*		fCurrentFileInfo;
+	
+			BButton*			fRefreshBtn;
 };
 
 
 #endif // STATUS_VIEW_H
+

src/apps/diskusage/VolumeView.cpp

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2010 Philippe Saint-Pierre, stpere@gmail.com
+ * All rights reserved. Distributed under the terms of the MIT license.
+ *
+ * Copyright (c) 1999 Mike Steed. You are free to use and distribute this software
+ * as long as it is accompanied by it's documentation and this copyright notice.
+ * The software comes with no warranty, etc.
+ */
+
+
+#include <Box.h>
+#include <Button.h>
+#include <StringView.h>
+#include <Volume.h>
+#include <Path.h>
+
+#include <LayoutBuilder.h>
+
+#include "Common.h"
+#include "MainWindow.h"
+#include "PieView.h"
+#include "StatusView.h"
+
+#include "VolumeView.h"
+
+const float kMinWinSize = 275.0;
+
+VolumeView::VolumeView(const char* name, BVolume* volume)
+	: BView(name, B_WILL_DRAW)
+{
+	SetLayout(new BGroupLayout(B_HORIZONTAL));
+	fPieView = new PieView(volume);
+
+	fPieView->SetExplicitMinSize(BSize(kMinWinSize, kMinWinSize));
+
+	fStatusView = new StatusView();
+
+	AddChild(BLayoutBuilder::Group<>(B_VERTICAL)
+		.Add(fPieView)
+		.Add(fStatusView)
+	);
+}
+
+
+VolumeView::~VolumeView()
+{
+}
+
+
+void
+VolumeView::SetRescanEnabled(bool enabled)
+{
+	fStatusView->SetRescanEnabled(enabled);
+}
+
+
+void
+VolumeView::SetPath(BPath path)
+{
+	fPieView->SetPath(path);
+	fStatusView->SetBtnLabel(kStrRescan);
+}
+
+
+void
+VolumeView::MessageReceived(BMessage* msg)
+{
+	msg->PrintToStream();
+	switch(msg->what) {
+		case kBtnRescan:
+			fPieView->MessageReceived(msg);
+			fStatusView->SetBtnLabel(kStrRescan);
+			break;
+
+		default:
+			BView::MessageReceived(msg);
+	}
+}
+
+
+void
+VolumeView::ShowInfo(const FileInfo* info)
+{
+	fStatusView->ShowInfo(info);
+}

src/apps/diskusage/VolumeView.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2010 Philippe Saint-Pierre, stpere@gmail.com
+ * All rights reserved. Distributed under the terms of the MIT license.
+ *
+ * Copyright (c) 1999 Mike Steed. You are free to use and distribute this software
+ * as long as it is accompanied by it's documentation and this copyright notice.
+ * The software comes with no warranty, etc.
+ */
+
+#ifndef VOLUMETAB_VIEW_H
+#define VOLUMETAB_VIEW_H
+
+#include <View.h>
+
+class BButton;
+class BPath;
+class BStringView;
+class BVolume;
+class PieView;
+class MainWindow;
+class StatusView;
+
+struct FileInfo;
+
+
+class VolumeView: public BView {
+	
+public:
+								VolumeView(const char* name, BVolume* volume);
+	virtual						~VolumeView();
+
+	virtual	void				MessageReceived(BMessage* message);
+			void				SetRescanEnabled(bool enabled);
+			void				SetPath(BPath path);
+			void				ShowInfo(const FileInfo* info);
+
+private:
+	PieView*			fPieView;
+	StatusView*			fStatusView;
+};
+
+
+
+#endif