- added option resize image to window size

- added show next/previous file using Command + Cursor Up/Down key
- rewrote selection code
- added marching ants
- renamed member variables to start with capital letter after field prefix


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5255 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/showimage/ShowImageApp.cpp

@@ -46,8 +46,8 @@ int main(int, char **)
 ShowImageApp::ShowImageApp()
 	: BApplication(APP_SIG)
 {
-	fbpulseStarted = false;
-	fpopenPanel = new BFilePanel(B_OPEN_PANEL);
+	fbPulseStarted = false;
+	fpOpenPanel = new BFilePanel(B_OPEN_PANEL);
 }
 
 void
@@ -62,7 +62,7 @@ void
 ShowImageApp::ReadyToRun()
 {
 	if (CountWindows() == WINDOWS_TO_IGNORE)
-		fpopenPanel->Show();
+		fpOpenPanel->Show();
 	else
 		// If image windows are already open
 		// (paths supplied on the command line)
@@ -73,10 +73,10 @@ ShowImageApp::ReadyToRun()
 void
 ShowImageApp::StartPulse()
 {
-	if (!fbpulseStarted) {
+	if (!fbPulseStarted) {
 		// Tell the app to begin checking
 		// for the number of open windows
-		fbpulseStarted = true;
+		fbPulseStarted = true;
 		SetPulseRate(250000);
 			// Set pulse to every 1/4 second
 	}
@@ -116,7 +116,7 @@ ShowImageApp::MessageReceived(BMessage *pmsg)
 {
 	switch (pmsg->what) {
 		case MSG_FILE_OPEN:
-			fpopenPanel->Show();
+			fpOpenPanel->Show();
 			break;
 			
 		case MSG_WINDOW_QUIT:

src/apps/showimage/ShowImageApp.h

@@ -47,8 +47,8 @@ private:
 	void StartPulse();
 	void Open(const entry_ref *pref);
 
-	BFilePanel *fpopenPanel;
-	bool fbpulseStarted;
+	BFilePanel *fpOpenPanel;
+	bool fbPulseStarted;
 };
 
 #endif /* _ShowImageApp_h */

src/apps/showimage/ShowImageConstants.h

@@ -46,6 +46,9 @@ const uint32 MSG_PAGE_FIRST			= 'mPGF';
 const uint32 MSG_PAGE_LAST			= 'mPGL';
 const uint32 MSG_PAGE_NEXT			= 'mPGN';
 const uint32 MSG_PAGE_PREV			= 'mPGP';
+const uint32 MSG_FILE_NEXT          = 'mFLN';
+const uint32 MSG_FILE_PREV          = 'mFLP';
+const uint32 MSG_FIT_TO_WINDOW_SIZE = 'mFWS';
 
 extern const char *APP_SIG;
 

src/apps/showimage/ShowImageStatusView.cpp

@@ -37,12 +37,12 @@ ShowImageStatusView::ShowImageStatusView(BRect rect, const char* name,
 void
 ShowImageStatusView::Draw(BRect updateRect)
 {
-	DrawString(fstrText.String(), BPoint(3, 11));
+	DrawString(fText.String(), BPoint(3, 11));
 }
 
 void
-ShowImageStatusView::SetText(BString &strText)
+ShowImageStatusView::SetText(BString &text)
 {
-	fstrText = strText;
+	fText = text;
 	Invalidate();
 }

src/apps/showimage/ShowImageStatusView.h

@@ -39,10 +39,10 @@ public:
 	
 	virtual void Draw(BRect updateRect);
 	
-	void SetText(BString &strText);
+	void SetText(BString &text);
 	
 private:
-    BString fstrText;
+    BString fText;
 };
 
 #endif /* _ShowImageStatusView_h */

src/apps/showimage/ShowImageView.cpp

@@ -39,6 +39,7 @@
 #include <BitmapStream.h>
 #include <Rect.h>
 #include <SupportDefs.h>
+#include <Directory.h>
 
 #include "ShowImageConstants.h"
 #include "ShowImageView.h"
@@ -55,36 +56,129 @@
 #define PEN_SIZE 1.0f
 const rgb_color kborderColor = { 0, 0, 0, 255 };
 
+// use patterns to simulate marching ants for selection
+void 
+ShowImageView::InitPatterns()
+{
+	uchar p;
+	uchar p1 = 0x33;
+	uchar p2 = 0xCC;
+	for (int i = 0; i <= 7; i ++) {
+		fPatternLeft.data[i] = p1;
+		fPatternRight.data[i] = p2;
+		if ((i / 2) % 2 == 0) {
+			p = 255;
+		} else {
+			p = 0;
+		}
+		fPatternUp.data[i] = p;
+		fPatternDown.data[i] = ~p;
+	}
+}
+
+void
+ShowImageView::RotatePatterns()
+{
+	int i;
+	uchar p;
+	bool set;
+	
+	// rotate up
+	p = fPatternUp.data[0];
+	for (i = 0; i <= 6; i ++) {
+		fPatternUp.data[i] = fPatternUp.data[i+1];	
+	}
+	fPatternUp.data[7] = p;
+	
+	// rotate down
+	p = fPatternDown.data[7];
+	for (i = 7; i >= 1; i --) {
+		fPatternDown.data[i] = fPatternDown.data[i-1];
+	}
+	fPatternDown.data[0] = p;
+	
+	// rotate to left
+	p = fPatternLeft.data[0];
+	set = (p & 0x80) != 0;
+	p <<= 1;
+	p &= 0xfe;
+	if (set) p |= 1;
+	memset(fPatternLeft.data, p, 8);
+	
+	// rotate to right
+	p = fPatternRight.data[0];
+	set = (p & 1) != 0;
+	p >>= 1;
+	if (set) p |= 0x80;
+	memset(fPatternRight.data, p, 8);
+}
+
+void
+ShowImageView::Pulse()
+{
+	RotatePatterns();
+	if (fbHasSelection) {
+		DrawSelectionBox(fSelectionRect);
+	}
+}
+
 ShowImageView::ShowImageView(BRect rect, const char *name, uint32 resizingMode,
 	uint32 flags)
 	: BView(rect, name, resizingMode, flags)
 {
-	fpbitmap = NULL;
-	fdocumentIndex = 1;
-	fdocumentCount = 1;
-	fbhasSelection = false;
+	InitPatterns();
 	
-	SetViewColor(ui_color(B_PANEL_BACKGROUND_COLOR));
+	fpBitmap = NULL;
+	fDocumentIndex = 1;
+	fDocumentCount = 1;
+	fbHasSelection = false;
+	fResizeToViewBounds = false;
+	
+	SetViewColor(B_TRANSPARENT_COLOR);
 	SetHighColor(kborderColor);
+	SetLowColor(ui_color(B_PANEL_BACKGROUND_COLOR));
 	SetPenSize(PEN_SIZE);
 }
 
 ShowImageView::~ShowImageView()
 {
-	delete fpbitmap;
-	fpbitmap = NULL;
+	delete fpBitmap;
+	fpBitmap = NULL;
+}
+
+bool
+ShowImageView::IsImage(const entry_ref *pref)
+{
+	BFile file(pref, B_READ_ONLY);
+	translator_info info;
+	memset(&info, 0, sizeof(translator_info));
+	BMessage ioExtension;
+
+	BTranslatorRoster *proster = BTranslatorRoster::Default();
+	if (!proster)
+		return false;
+
+	if (ioExtension.AddInt32("/documentIndex", fDocumentIndex) != B_OK)
+		return false;
+
+	if (proster->Identify(&file, &ioExtension, &info, 0, NULL,
+		B_TRANSLATOR_BITMAP) != B_OK)
+		return false;
+		
+	return true;
 }
 
 void
 ShowImageView::SetImage(const entry_ref *pref)
 {
-	ClearViewBitmap();
-	delete fpbitmap;
-	fpbitmap = NULL;
+	delete fpBitmap;
+	fpBitmap = NULL;
+	fbHasSelection = false;
+	fMakesSelection = false;
 	
 	entry_ref ref;
 	if (!pref)
-		ref = fcurrentRef;
+		ref = fCurrentRef;
 	else
 		ref = *pref;
 
@@ -95,10 +189,10 @@ ShowImageView::SetImage(const entry_ref *pref)
 	translator_info info;
 	memset(&info, 0, sizeof(translator_info));
 	BMessage ioExtension;
-	if (ref != fcurrentRef)
+	if (ref != fCurrentRef)
 		// if new image, reset to first document
-		fdocumentIndex = 1;
-	if (ioExtension.AddInt32("/documentIndex", fdocumentIndex) != B_OK)
+		fDocumentIndex = 1;
+	if (ioExtension.AddInt32("/documentIndex", fDocumentIndex) != B_OK)
 		return;
 	if (proster->Identify(&file, &ioExtension, &info, 0, NULL,
 		B_TRANSLATOR_BITMAP) != B_OK)
@@ -109,39 +203,43 @@ ShowImageView::SetImage(const entry_ref *pref)
 	if (proster->Translate(&file, &info, &ioExtension, &outstream,
 		B_TRANSLATOR_BITMAP) != B_OK)
 		return;
-	if (outstream.DetachBitmap(&fpbitmap) != B_OK)
+	if (outstream.DetachBitmap(&fpBitmap) != B_OK)
 		return;
-	fcurrentRef = ref;
+	fCurrentRef = ref;
 	
 	// get the number of documents (pages) if it has been supplied
 	int32 documentCount = 0;
 	if (ioExtension.FindInt32("/documentCount", &documentCount) == B_OK &&
 		documentCount > 0)
-		fdocumentCount = documentCount;
+		fDocumentCount = documentCount;
 	else
-		fdocumentCount = 1;
+		fDocumentCount = 1;
 		
 	// send message to parent about new image
 	BMessage msg(MSG_UPDATE_STATUS);
 	msg.AddString("status", info.name);
+	msg.AddRef("ref", &fCurrentRef);
 	BMessenger msgr(Window());
 	msgr.SendMessage(&msg);
-	
-	SetViewBitmap(fpbitmap, fpbitmap->Bounds(),
-		BRect(BORDER_WIDTH, BORDER_HEIGHT,
-			fpbitmap->Bounds().Width() + BORDER_WIDTH,
-			fpbitmap->Bounds().Height() + BORDER_HEIGHT),
-		B_FOLLOW_TOP | B_FOLLOW_LEFT, 0
-	);
 
 	FixupScrollBars();
 	Invalidate();
 }
 
+void
+ShowImageView::ResizeToViewBounds(bool resize)
+{
+	if (fResizeToViewBounds != resize) {
+		fResizeToViewBounds = resize;
+		FixupScrollBars();
+		Invalidate();
+	}
+}
+
 BBitmap *
 ShowImageView::GetBitmap()
 {
-	return fpbitmap;
+	return fpBitmap;
 }
 
 void
@@ -150,43 +248,122 @@ ShowImageView::AttachedToWindow()
 	FixupScrollBars();
 }
 
+BRect
+ShowImageView::AlignBitmap() const
+{
+	BRect rect(fpBitmap->Bounds());
+	if (fResizeToViewBounds) {
+		float width, height;
+		width = Bounds().Width()-2*PEN_SIZE;
+		height = Bounds().Height()-2*PEN_SIZE;
+		if (width > 0 && height > 0) {
+			float s;
+			s = width / rect.Width();
+			
+			if (s * rect.Height() <= height) {
+				rect.right = width;
+				rect.bottom = s * rect.Height();
+				// center horizontally
+				rect.OffsetBy(0, (height - rect.Height()) / 2);
+			} else {
+				rect.right = height / rect.Height() * rect.Width();
+				rect.bottom = height;
+				// center vertically
+				rect.OffsetBy((width - rect.Width()) / 2, 0);
+			}
+		}
+	} else {
+		rect.OffsetBy(BORDER_WIDTH, BORDER_WIDTH);
+	}
+	rect.OffsetBy(PEN_SIZE, PEN_SIZE);
+	return rect;
+}
+
+void
+ShowImageView::Setup(BRect rect)
+{
+	fLeft = rect.left;
+	fTop = rect.top;
+	fScaleX = rect.Width() / fpBitmap->Bounds().Width();
+	fScaleY = rect.Height() / fpBitmap->Bounds().Height();
+// XXX Is Width/Height off by one?
+//	fScaleX = (rect.Width()+1) / (fpBitmap->Bounds().Width()+1);
+//	fScaleY = (rect.Width()+1) / (fpBitmap->Bounds().Height()+1);
+}
+
+BPoint
+ShowImageView::ImageToView(BPoint p) const
+{
+	p.x = fScaleX * p.x + fLeft;
+	p.y = fScaleY * p.y + fTop;
+	return p;
+}
+
+BPoint
+ShowImageView::ViewToImage(BPoint p) const
+{
+	p.x = (p.x - fLeft) / fScaleX;
+	p.y = (p.y - fTop) / fScaleY;
+	return p;
+}
+
+BRect
+ShowImageView::ImageToView(BRect r) const
+{
+	BPoint leftTop(ImageToView(BPoint(r.left, r.top)));
+	BPoint rightBottom(ImageToView(BPoint(r.right, r.bottom)));
+	return BRect(leftTop.x, leftTop.y, rightBottom.x, rightBottom.y);
+}
+
+void
+ShowImageView::DrawBorder(BRect border)
+{
+	BRect bounds(Bounds());
+	// top
+	FillRect(BRect(0, 0, bounds.right, border.top-1), B_SOLID_LOW);
+	// left
+	FillRect(BRect(0, border.top, border.left-1, border.bottom), B_SOLID_LOW);
+	// right
+	FillRect(BRect(border.right+1, border.top, bounds.right, border.bottom), B_SOLID_LOW);
+	// bottom
+	FillRect(BRect(0, border.bottom+1, bounds.right, bounds.bottom), B_SOLID_LOW);
+}
+
 void
 ShowImageView::Draw(BRect updateRect)
 {
-	if (fpbitmap) {
+	if (fpBitmap) {
+		BRect rect = AlignBitmap();
+		Setup(rect);
+		
+		BRect border(rect);
+		border.InsetBy(-PEN_SIZE, -PEN_SIZE);
+
+		DrawBorder(border);
+
 		// Draw black rectangle around image
-		StrokeRect(
-			BRect(BORDER_WIDTH - PEN_SIZE,
-				BORDER_HEIGHT - PEN_SIZE,
-				fpbitmap->Bounds().Width() + BORDER_WIDTH + PEN_SIZE,
-				fpbitmap->Bounds().Height() + BORDER_HEIGHT + PEN_SIZE));
-				
-		if (fbhasSelection)
-			DrawSelectionBox(fselectionRect);
+		StrokeRect(border);
+		
+		// Draw image	
+		DrawBitmap(fpBitmap, fpBitmap->Bounds(), rect);
+					
+		if (fbHasSelection)
+			DrawSelectionBox(fSelectionRect);
 	}
 }
 
 void
 ShowImageView::DrawSelectionBox(BRect &rect)
 {
-	// TODO: Make my own pattern to mimic the
-	// marching ants in Be's ShowImage?
-	
-	StrokeRect(rect, B_MIXED_COLORS);
-	Sync();
-}
-
-void
-ShowImageView::ClearSelectionBox(BRect &rect)
-{
-	BRect bitmapRect = rect;
-	if (!bitmapRect.IsValid())
-		printf("Invalid Rect\n");
-		
-	bitmapRect.OffsetBy(-(BORDER_WIDTH), -(BORDER_HEIGHT));	
-	DrawBitmapAsync(fpbitmap, bitmapRect, rect);
-		// don't draw the bitmap immediately, more drawing
-		// almost always comes after this function is used
+	PushState();
+	rgb_color white = {255, 255, 255};
+	SetLowColor(white);
+	BRect r(ImageToView(rect));
+	StrokeLine(BPoint(r.left, r.top), BPoint(r.right, r.top), fPatternLeft);
+	StrokeLine(BPoint(r.right, r.top+1), BPoint(r.right, r.bottom-1), fPatternUp);
+	StrokeLine(BPoint(r.left, r.bottom), BPoint(r.right, r.bottom), fPatternRight);
+	StrokeLine(BPoint(r.left, r.top+1), BPoint(r.left, r.bottom-1), fPatternDown);
+	PopState();
 }
 
 void
@@ -199,83 +376,64 @@ void
 ShowImageView::ConstrainToImage(BPoint &point)
 {
 	point.ConstrainTo(
-		BRect(
-			BORDER_WIDTH, BORDER_HEIGHT,
-			fpbitmap->Bounds().Width() + BORDER_WIDTH,
-			fpbitmap->Bounds().Height() + BORDER_HEIGHT
-		)
+		fpBitmap->Bounds()
 	);
 }
 
 void
 ShowImageView::MouseDown(BPoint point)
 {
-	// TODO: Need to handle the case where user clicks
-	// inside an existing selection and starts a drag operation
+	point = ViewToImage(point);
 	
-	if (fbhasSelection)
-		ClearSelectionBox(fselectionRect);
-	
-	fbhasSelection = false;
-	
-	if (!fpbitmap) {
-		// Can't select anything if there is no image
-		Invalidate();
-		return;
-	}
-
-	BPoint firstPoint, secondPoint;
-	firstPoint = point;
-	ConstrainToImage(firstPoint);
-	secondPoint = firstPoint;
-	
-	BRect curSel, lastSel;
-
-	BMessage *pmsg = Window()->CurrentMessage();
-	uint32 buttons = static_cast<uint32>(pmsg->FindInt32("buttons"));
-	bool bfirst = true;
-	// While any combination of mouse buttons is down,
-	// allow the user to size their selection. When all
-	// mouse buttons are up, the loop ends, and the selection
-	// has been made.
-	while (buttons) {
-		ConstrainToImage(secondPoint);
-		
-		// make a BRect that passes IsValid()
-		curSel.left = min(firstPoint.x, secondPoint.x);
-		curSel.top = min(firstPoint.y, secondPoint.y);
-		curSel.right = max(firstPoint.x, secondPoint.x);
-		curSel.bottom = max(firstPoint.y, secondPoint.y);
-
-		if (!bfirst && curSel != lastSel)
-			ClearSelectionBox(lastSel);
-		if (curSel != lastSel)
-			DrawSelectionBox(curSel);
-				
-		snooze(25 * 1000);
-		lastSel = curSel;
-		GetMouse(&secondPoint, &buttons);
-		bfirst = false;
-	}
-
-	if (curSel.IntegerWidth() < 2 && curSel.IntegerHeight() < 2) {
-		// The user must select at least 2 pixels
-		fbhasSelection = false;
-		Invalidate();
+	if (fbHasSelection && fSelectionRect.Contains(point)) {
+		// TODO: start drag and drop
 	} else {
-		fselectionRect = curSel;
-		fbhasSelection = true;
+		// begin new selection
+		fMakesSelection = true;
+		fbHasSelection = true;
+		SetMouseEventMask(B_POINTER_EVENTS);
+		ConstrainToImage(point);
+		fFirstPoint = point;
+		fSelectionRect.Set(point.x, point.y, point.x, point.y);
+		Invalidate(); 
+	}
+}
+
+void
+ShowImageView::UpdateSelectionRect(BPoint point, bool final) {
+	BRect oldSelection = fSelectionRect;
+	point = ViewToImage(point);
+	ConstrainToImage(point);
+	fSelectionRect.left = min(fFirstPoint.x, point.x);
+	fSelectionRect.right = max(fFirstPoint.x, point.x);
+	fSelectionRect.top = min(fFirstPoint.y, point.y);
+	fSelectionRect.bottom = max(fFirstPoint.y, point.y);
+	if (final) {
+		// selection must contain a few pixels
+		if (fSelectionRect.Width() * fSelectionRect.Height() <= 1) {
+			fbHasSelection = false;
+		}
+	}
+	if (oldSelection != fSelectionRect || !fbHasSelection) {
+		Invalidate();
 	}
 }
 
 void
 ShowImageView::MouseMoved(BPoint point, uint32 state, const BMessage *pmsg)
 {
+	if (fMakesSelection) {
+		UpdateSelectionRect(point, false);
+	}
 }
 
 void
 ShowImageView::MouseUp(BPoint point)
 {
+	if (fMakesSelection) {
+		UpdateSelectionRect(point, true);
+		fMakesSelection = false;
+	}
 }
 
 void
@@ -291,12 +449,21 @@ ShowImageView::MessageReceived(BMessage *pmsg)
 void
 ShowImageView::FixupScrollBars()
 {
+	BScrollBar *psb;	
+	if (fResizeToViewBounds) {
+		psb = ScrollBar(B_HORIZONTAL);
+		if (psb) psb->SetRange(0, 0);
+		psb = ScrollBar(B_VERTICAL);
+		if (psb) psb->SetRange(0, 0);
+		return;
+	}
+
 	BRect rctview = Bounds(), rctbitmap(0, 0, 0, 0);
-	if (fpbitmap)
-		rctbitmap = fpbitmap->Bounds();
+	if (fpBitmap)
+		rctbitmap = fpBitmap->Bounds();
 	
 	float prop, range;
-	BScrollBar *psb = ScrollBar(B_HORIZONTAL);
+	psb = ScrollBar(B_HORIZONTAL);
 	if (psb) {
 		range = rctbitmap.Width() + (BORDER_WIDTH * 2) - rctview.Width();
 		if (range < 0) range = 0;
@@ -322,20 +489,20 @@ ShowImageView::FixupScrollBars()
 int32
 ShowImageView::CurrentPage()
 {
-	return fdocumentIndex;
+	return fDocumentIndex;
 }
 
 int32
 ShowImageView::PageCount()
 {
-	return fdocumentCount;
+	return fDocumentCount;
 }
 
 void
 ShowImageView::FirstPage()
 {
-	if (fdocumentIndex != 1) {
-		fdocumentIndex = 1;
+	if (fDocumentIndex != 1) {
+		fDocumentIndex = 1;
 		SetImage(NULL);
 	}
 }
@@ -343,8 +510,8 @@ ShowImageView::FirstPage()
 void
 ShowImageView::LastPage()
 {
-	if (fdocumentIndex != fdocumentCount) {
-		fdocumentIndex = fdocumentCount;
+	if (fDocumentIndex != fDocumentCount) {
+		fDocumentIndex = fDocumentCount;
 		SetImage(NULL);
 	}
 }
@@ -352,8 +519,8 @@ ShowImageView::LastPage()
 void
 ShowImageView::NextPage()
 {
-	if (fdocumentIndex < fdocumentCount) {
-		fdocumentIndex++;
+	if (fDocumentIndex < fDocumentCount) {
+		fDocumentIndex++;
 		SetImage(NULL);
 	}
 }
@@ -361,8 +528,88 @@ ShowImageView::NextPage()
 void
 ShowImageView::PrevPage()
 {
-	if (fdocumentIndex > 1) {
-		fdocumentIndex--;
+	if (fDocumentIndex > 1) {
+		fDocumentIndex--;
 		SetImage(NULL);
 	}
 }
+
+void
+ShowImageView::FreeEntries(BList* entries)
+{
+	const int32 n = entries->CountItems();
+	for (int32 i = 0; i < n; i ++) {
+		BEntry* entry = (BEntry*)entries->ItemAt(i);
+		delete entry;		
+	}
+	entries->MakeEmpty();
+}
+
+// Notes: BDirectory::GetNextEntry() must not necessary
+// return entries sorted by name, thou BFS does. 
+bool
+ShowImageView::FindNextImage(BEntry* image, bool next)
+{
+	BEntry curImage(&fCurrentRef);
+	BEntry entry;
+	BDirectory parent;
+	BList entries;
+
+	if (curImage.GetParent(&parent) != B_OK)
+		return false;
+
+	while (parent.GetNextEntry(&entry) == B_OK) {
+		if (entry == curImage) {
+			// found current image
+			if (next) {
+				// find next image in directory
+				while (parent.GetNextEntry(&entry) == B_OK) {
+					entry_ref ref;
+					if (entry.GetRef(&ref) == B_OK && IsImage(&ref)) {
+						*image = entry;
+						return true;
+					}
+				}
+			} else {
+				// find privous image in directory
+				for (int32 i = entries.CountItems() - 1; i >= 0; i --) {
+					BEntry* entry = (BEntry*)entries.ItemAt(i);
+					entry_ref ref;
+					if (entry->GetRef(&ref) == B_OK && IsImage(&ref)) {
+						*image = *entry;
+						FreeEntries(&entries);
+						return true;
+					}
+				}
+			}
+		}
+		if (!next) {			
+			// record entries if we search for previous file
+			entries.AddItem(new BEntry(entry));
+		}
+	}
+	FreeEntries(&entries);
+	return false;
+}
+
+void
+ShowImageView::NextFile()
+{
+	BEntry image;
+	entry_ref ref;
+	
+	if (FindNextImage(&image, true) && image.GetRef(&ref) == B_OK) {
+		SetImage(&ref);
+	}
+}
+
+void
+ShowImageView::PrevFile()
+{
+	BEntry image;
+	entry_ref ref;
+
+	if (FindNextImage(&image, false) && image.GetRef(&ref) == B_OK) {
+		SetImage(&ref);
+	}
+}

src/apps/showimage/ShowImageView.h

@@ -40,7 +40,10 @@ public:
 		uint32 flags);
 	~ShowImageView();
 	
+	void Pulse();
+	
 	void SetImage(const entry_ref *pref);
+	void ResizeToViewBounds(bool resize);
 	BBitmap *GetBitmap();
 	
 	virtual void AttachedToWindow();
@@ -60,18 +63,39 @@ public:
 	void LastPage();
 	void NextPage();
 	void PrevPage();
+	void NextFile();
+	void PrevFile();
 	
 private:
+	void InitPatterns();
+	void RotatePatterns();
+	BRect AlignBitmap() const;
+	void Setup(BRect r);
+	BPoint ImageToView(BPoint p) const;
+	BPoint ViewToImage(BPoint p) const;
+	BRect ImageToView(BRect r) const;
+	bool IsImage(const entry_ref* pref);
+	void FreeEntries(BList* entries);
+	bool FindNextImage(BEntry* entry, bool next);
 	void ConstrainToImage(BPoint &point);
+	void UpdateSelectionRect(BPoint point, bool final);
+	void DrawBorder(BRect border);
 	void DrawSelectionBox(BRect &rect);
-	void ClearSelectionBox(BRect &rect);
 	
-	entry_ref fcurrentRef;
-	int32 fdocumentIndex;
-	int32 fdocumentCount;
-	BBitmap *fpbitmap;
-	bool fbhasSelection;
-	BRect fselectionRect;
+	entry_ref fCurrentRef;
+	int32 fDocumentIndex;
+	int32 fDocumentCount;
+	BBitmap *fpBitmap;
+	bool fResizeToViewBounds;
+	float fLeft;         // the origin of the image in the view
+	float fTop;
+	float fScaleX;
+	float fScaleY;
+	bool fMakesSelection; // is a selection being made
+	BPoint fFirstPoint;   // first point in image space of selection
+	bool fbHasSelection;  // is fSelectionRect valid 
+	BRect fSelectionRect; // the selection in image space
+	pattern fPatternUp, fPatternDown, fPatternLeft, fPatternRight;
 };
 
 #endif /* _ShowImageView_h */

src/apps/showimage/ShowImageWindow.cpp

@@ -51,24 +51,28 @@
 ShowImageWindow::ShowImageWindow(const entry_ref *pref)
 	: BWindow(BRect(50, 50, 350, 250), "", B_DOCUMENT_WINDOW, 0)
 {
-	fpsavePanel = NULL;
-	fpref = NULL;
+	fpSavePanel = NULL;
+	fpRef = NULL;
+	
+	// add shortcuts
+	AddShortcut(B_UP_ARROW, B_COMMAND_KEY, new BMessage(MSG_FILE_PREV));
+	AddShortcut(B_DOWN_ARROW, B_COMMAND_KEY, new BMessage(MSG_FILE_NEXT));
 	
 	// create menu bar	
-	fpbar = new BMenuBar(BRect(0, 0, Bounds().right, 20), "menu_bar");
-	LoadMenus(fpbar);
-	AddChild(fpbar);
+	fpBar = new BMenuBar(BRect(0, 0, Bounds().right, 20), "menu_bar");
+	LoadMenus(fpBar);
+	AddChild(fpBar);
 
 	BRect viewFrame = Bounds();
-	viewFrame.top		= fpbar->Bounds().bottom + 1;
+	viewFrame.top		= fpBar->Bounds().bottom + 1;
 	viewFrame.right		-= B_V_SCROLL_BAR_WIDTH;
 	viewFrame.bottom	-= B_H_SCROLL_BAR_HEIGHT;
 	
 	// create the image view	
-	fpimageView = new ShowImageView(viewFrame, "image_view", B_FOLLOW_ALL, 
-		B_WILL_DRAW | B_FRAME_EVENTS);	
+	fpImageView = new ShowImageView(viewFrame, "image_view", B_FOLLOW_ALL, 
+		B_WILL_DRAW | B_FRAME_EVENTS | B_FULL_UPDATE_ON_RESIZE | B_PULSE_NEEDED);	
 	// wrap a scroll view around the view
-	BScrollView *pscrollView = new BScrollView("image_scroller", fpimageView,
+	BScrollView *pscrollView = new BScrollView("image_scroller", fpImageView,
 		B_FOLLOW_ALL, 0, false, false, B_PLAIN_BORDER);
 	AddChild(pscrollView);
 	
@@ -79,23 +83,23 @@ ShowImageWindow::ShowImageWindow(const entry_ref *pref)
 	rect.left 	= viewFrame.left + kstatusWidth;
 	rect.right	= viewFrame.right;	
 	BScrollBar *phscroll;
-	phscroll = new BScrollBar(rect, "hscroll", fpimageView, 0, 150,
+	phscroll = new BScrollBar(rect, "hscroll", fpImageView, 0, 150,
 		B_HORIZONTAL);
 	AddChild(phscroll);
 
 	rect.left = 0;
 	rect.right = kstatusWidth - 1;	
-	fpstatusView = new ShowImageStatusView(rect, "status_view", B_FOLLOW_BOTTOM,
+	fpStatusView = new ShowImageStatusView(rect, "status_view", B_FOLLOW_BOTTOM,
 		B_WILL_DRAW);
-	fpstatusView->SetViewColor(ui_color(B_MENU_BACKGROUND_COLOR));
-	AddChild(fpstatusView);
+	fpStatusView->SetViewColor(ui_color(B_MENU_BACKGROUND_COLOR));
+	AddChild(fpStatusView);
 	
 	rect = Bounds();
 	rect.top    = viewFrame.top;
 	rect.left 	= viewFrame.right + 1;
 	rect.bottom	= viewFrame.bottom;
 	BScrollBar *pvscroll;
-	pvscroll = new BScrollBar(rect, "vscroll", fpimageView, 0, 150, B_VERTICAL);
+	pvscroll = new BScrollBar(rect, "vscroll", fpImageView, 0, 150, B_VERTICAL);
 	AddChild(pvscroll);
 	
 	SetSizeLimits(250, 100000, 100, 100000);
@@ -104,20 +108,22 @@ ShowImageWindow::ShowImageWindow(const entry_ref *pref)
 	SetRef(pref);
 	UpdateTitle();
 
-	fpimageView->SetImage(pref);
+	fpImageView->SetImage(pref);
+
+	SetPulseRate(100000); // every 1/10 second; ShowImageView needs it for marching ants
 
 	Show();
 }
 
 ShowImageWindow::~ShowImageWindow()
 {
-	delete fpref;
+	delete fpRef;
 }
 
 status_t
 ShowImageWindow::InitCheck()
 {
-	if (!fpref || !fpimageView)
+	if (!fpRef || !fpImageView)
 		return B_ERROR;
 	else
 		return B_OK;
@@ -126,16 +132,16 @@ ShowImageWindow::InitCheck()
 void
 ShowImageWindow::SetRef(const entry_ref *pref)
 {
-	if (!fpref)
-		fpref = new entry_ref(*pref);
+	if (!fpRef)
+		fpRef = new entry_ref(*pref);
 	else
-		*fpref = *pref;
+		*fpRef = *pref;
 }
 
 void
 ShowImageWindow::UpdateTitle()
 {
-	BEntry entry(fpref);
+	BEntry entry(fpRef);
 	if (entry.InitCheck() == B_OK) {
 		BPath path;
 		entry.GetPath(&path);
@@ -173,7 +179,7 @@ ShowImageWindow::LoadMenus(BMenuBar *pbar)
 	AddItemMenu(pmenu, "Select All", MSG_SELECT_ALL, 'A', 0, 'W', false);
 	pbar->AddItem(pmenu);
 
-	pmenu = fppageMenu = new BMenu("Page");
+	pmenu = fpPageMenu = new BMenu("Page");
 	AddItemMenu(pmenu, "First", MSG_PAGE_FIRST, 'F', 0, 'W', true);
 	AddItemMenu(pmenu, "Last", MSG_PAGE_LAST, 'L', 0, 'W', true);
 	AddItemMenu(pmenu, "Next", MSG_PAGE_NEXT, 'N', 0, 'W', true);
@@ -182,6 +188,7 @@ ShowImageWindow::LoadMenus(BMenuBar *pbar)
 
 	pmenu = new BMenu("Image");
 	AddItemMenu(pmenu, "Dither Image", MSG_DITHER_IMAGE, 0, 0, 'W', true);
+	AddItemMenu(pmenu, "Fit To Window Size", MSG_FIT_TO_WINDOW_SIZE, 0, 0, 'W', true);
 	pbar->AddItem(pmenu);
 }
 
@@ -207,7 +214,7 @@ ShowImageWindow::WindowRedimension(BBitmap *pbitmap)
 	// set the window's min & max size limits
 	// based on document's data bounds
 	float maxWidth = pbitmap->Bounds().Width() + B_V_SCROLL_BAR_WIDTH;
-	float maxHeight = pbitmap->Bounds().Height() + fpbar->Frame().Height() +
+	float maxHeight = pbitmap->Bounds().Height() + fpBar->Frame().Height() +
 		B_H_SCROLL_BAR_HEIGHT + 1;
 	float minWidth = min(maxWidth, 100.0f);
 	float minHeight = min(maxHeight, 100.0f);
@@ -237,13 +244,26 @@ ShowImageWindow::FrameResized(float width, float height)
 {
 }
 
+bool
+ShowImageWindow::ToggleMenuItem(uint32 what)
+{
+	BMenuItem *item;
+	bool marked = false;
+	item = fpBar->FindItem(what);
+	if (item != NULL) {
+		marked = !item->IsMarked();
+		item->SetMarked(marked);
+	}
+	return marked;
+}
+
 void
 ShowImageWindow::MessageReceived(BMessage *pmsg)
 {
 	switch (pmsg->what) {
 		case MSG_OUTPUT_TYPE:
 			// User clicked Save As then choose an output format
-			if (!fpsavePanel)
+			if (!fpSavePanel)
 				// If user doesn't already have a save panel open
 				SaveAs(pmsg);
 			break;
@@ -259,21 +279,27 @@ ShowImageWindow::MessageReceived(BMessage *pmsg)
 			break;
 			
 		case B_CANCEL:
-			delete fpsavePanel;
-			fpsavePanel = NULL;
+			delete fpSavePanel;
+			fpSavePanel = NULL;
 			break;
 			
 		case MSG_UPDATE_STATUS:
 		{
-			bool benable = (fpimageView->PageCount() > 1) ? true : false;
-			if (fppageMenu->IsEnabled() != benable)
+			bool benable = (fpImageView->PageCount() > 1) ? true : false;
+			if (fpPageMenu->IsEnabled() != benable)
 				// Only call this function if the state is changing
 				// to avoid flickering
-				fppageMenu->SetEnabled(benable);
+				fpPageMenu->SetEnabled(benable);
 				
 			BString str;
 			if (pmsg->FindString("status", &str) == B_OK)
-				fpstatusView->SetText(str);
+				fpStatusView->SetText(str);
+			
+			entry_ref ref;
+			if (pmsg->FindRef("ref", &ref) == B_OK) {
+				SetRef(&ref);
+				UpdateTitle();
+			}
 			break;
 		}
 
@@ -291,27 +317,41 @@ ShowImageWindow::MessageReceived(BMessage *pmsg)
 			break;
 			
 		case MSG_PAGE_FIRST:
-			fpimageView->FirstPage();
+			fpImageView->FirstPage();
 			break;
 			
 		case MSG_PAGE_LAST:
-			fpimageView->LastPage();
+			fpImageView->LastPage();
 			break;
 			
 		case MSG_PAGE_NEXT:
-			fpimageView->NextPage();
+			fpImageView->NextPage();
 			break;
 			
 		case MSG_PAGE_PREV:
-			fpimageView->PrevPage();
+			fpImageView->PrevPage();
 			break;
 
 		case MSG_DITHER_IMAGE:
-		     BMenuItem *pmenuDither;
-	    	 pmenuDither = fpbar->FindItem(pmsg->what);
-		     pmenuDither->SetMarked(!pmenuDither->IsMarked());
-		     break;
-		 
+			ToggleMenuItem(pmsg->what);
+			break;
+		
+		case MSG_FIT_TO_WINDOW_SIZE:
+			{
+				bool resize;
+				resize = ToggleMenuItem(pmsg->what);
+				fpImageView->ResizeToViewBounds(resize);
+			}
+			break;
+
+		case MSG_FILE_PREV:
+			fpImageView->PrevFile();
+			break;
+			
+		case MSG_FILE_NEXT:
+			fpImageView->NextFile();
+			break;
+					
 		default:
 			BWindow::MessageReceived(pmsg);
 			break;
@@ -338,12 +378,12 @@ ShowImageWindow::SaveAs(BMessage *pmsg)
 	ppanelMsg->AddInt32(TYPE_FLD, outType);
 
 	// Create save panel and show it
-	fpsavePanel = new BFilePanel(B_SAVE_PANEL, new BMessenger(this), NULL, 0,
+	fpSavePanel = new BFilePanel(B_SAVE_PANEL, new BMessenger(this), NULL, 0,
 		false, ppanelMsg);
-	if (!fpsavePanel)
+	if (!fpSavePanel)
 		return;
-	fpsavePanel->Window()->SetWorkspaces(B_CURRENT_WORKSPACE);
-	fpsavePanel->Show();
+	fpSavePanel->Window()->SetWorkspaces(B_CURRENT_WORKSPACE);
+	fpSavePanel->Show();
 }
 
 void
@@ -375,7 +415,7 @@ ShowImageWindow::SaveToFile(BMessage *pmsg)
 		return;
 	
 	// Translate the image and write it out to the output file
-	BBitmapStream stream(fpimageView->GetBitmap());	
+	BBitmapStream stream(fpImageView->GetBitmap());	
 	BTranslatorRoster *proster = BTranslatorRoster::Default();
 	if (proster->Translate(outTranslator, &stream, NULL,
 		&file, outType) != B_OK) {
@@ -392,7 +432,7 @@ ShowImageWindow::SaveToFile(BMessage *pmsg)
 bool
 ShowImageWindow::CanQuit()
 {
-	if (fpsavePanel)
+	if (fpSavePanel)
 		// Don't allow this window to be closed if a save panel is open
 		return false;
 	else

src/apps/showimage/ShowImageWindow.h

@@ -52,7 +52,7 @@ public:
 	virtual void Quit();
 	
 	status_t InitCheck();
-	ShowImageView *GetShowImageView() const { return fpimageView; }
+	ShowImageView *GetShowImageView() const { return fpImageView; }
 	
 	void SetRef(const entry_ref *pref);
 	void UpdateTitle();
@@ -63,6 +63,8 @@ private:
 	BMenuItem *AddItemMenu(BMenu *pmenu, char *caption,
 		long unsigned int msg, char shortcut, uint32 modifier,
 		char target, bool enabled);
+
+	bool ToggleMenuItem(uint32 what);
 			
 	void SaveAs(BMessage *pmsg);
 		// Handle Save As submenu choice
@@ -71,12 +73,12 @@ private:
 	bool CanQuit();
 		// returns true if the window can be closed safely, false if not
 
-	BFilePanel *fpsavePanel;
-	BMenuBar *fpbar;
-	BMenu *fppageMenu;
-	entry_ref *fpref;
-	ShowImageView *fpimageView;
-	ShowImageStatusView *fpstatusView;
+	BFilePanel *fpSavePanel;
+	BMenuBar *fpBar;
+	BMenu *fpPageMenu;
+	entry_ref *fpRef;
+	ShowImageView *fpImageView;
+	ShowImageStatusView *fpStatusView;
 };
 
 #endif /* _ShowImageWindow_h */