Added feature where a file dropped from the Tracker becomes the current selection

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6121 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/showimage/ShowImageView.cpp

@@ -406,6 +406,31 @@ ShowImageView::SetImage(const entry_ref *pref)
 	return B_OK;
 }
 
+status_t
+ShowImageView::SetSelection(const entry_ref *pref, BPoint point)
+{
+	BTranslatorRoster *proster = BTranslatorRoster::Default();
+	if (!proster)
+		return B_ERROR;
+	BFile file(pref, B_READ_ONLY);
+	translator_info info;
+	memset(&info, 0, sizeof(translator_info));
+	if (proster->Identify(&file, NULL, &info, 0, NULL,
+		B_TRANSLATOR_BITMAP) != B_OK)
+		return B_ERROR;
+	
+	// Translate image data and create a new ShowImage window
+	BBitmapStream outstream;
+	if (proster->Translate(&file, &info, NULL, &outstream,
+		B_TRANSLATOR_BITMAP) != B_OK)
+		return B_ERROR;
+	BBitmap *newBitmap = NULL;
+	if (outstream.DetachBitmap(&newBitmap) != B_OK)
+		return B_ERROR;
+		
+	return PasteBitmap(newBitmap, point);
+}
+
 void
 ShowImageView::SetDither(bool dither)
 {
@@ -1449,11 +1474,24 @@ ShowImageView::MessageReceived(BMessage *pmsg)
 		}
 			
 		case B_SIMPLE_DATA:
+			if (pmsg->WasDropped()) {
+				uint32 type;
+				int32 count;
+				status_t ret = pmsg->GetInfo("refs", &type, &count);
+				if (ret == B_OK && type == B_REF_TYPE) {
+					// If file was dropped, open it as the selection
+					entry_ref ref;
+					if (pmsg->FindRef("refs", 0, &ref) == B_OK) {
+						BPoint point = pmsg->DropPoint();
+						point = ConvertFromScreen(point);
+						point = ViewToImage(point);
+						SetSelection(&ref, point);
+					}
+				} else {
 					// If a user drags a clip from another ShowImage window,
 					// request a BBitmap pointer to that clip, allocated by the
 					// other view, for use solely by this view, so that it can
 					// be dropped/pasted onto this view.
-			if (pmsg->WasDropped()) {
 					BMessenger retMsgr, localMsgr(this);
 					retMsgr = pmsg->ReturnAddress();
 					if (retMsgr != localMsgr) {
@@ -1475,7 +1513,7 @@ ShowImageView::MessageReceived(BMessage *pmsg)
 							
 							PasteBitmap(bitmap, point);
 						}
-					
+					}
 				}
 			}
 			break;
@@ -1646,7 +1684,7 @@ ShowImageView::Cut()
 	RemoveSelection(true);
 }
 
-void
+status_t
 ShowImageView::PasteBitmap(BBitmap *bitmap, BPoint point)
 {
 	if (bitmap && bitmap->IsValid()) {
@@ -1666,7 +1704,11 @@ ShowImageView::PasteBitmap(BBitmap *bitmap, BPoint point)
 			fSelectionRect = offsetRect;
 		
 		Invalidate();
+		
+		return B_OK;
 	}
+	
+	return B_ERROR;
 }
 
 void

src/apps/showimage/ShowImageView.h

@@ -138,7 +138,8 @@ private:
 	void AddWhiteRect(BRect &rect);
 	void GetMergeRects(BBitmap *merge, BRect selection, BRect &srcBits, BRect &destRect);
 	void GetSelMergeRects(BRect &srcBits, BRect &destRect);
-	void PasteBitmap(BBitmap *bitmap, BPoint point);
+	status_t SetSelection(const entry_ref *pref, BPoint point);
+	status_t PasteBitmap(BBitmap *bitmap, BPoint point);
 	void MergeWithBitmap(BBitmap *merge, BRect selection);
 	void MergeSelection();
 	void DeleteScaler();