a first and really naive implementation of drag&drop support, no visuals yet... Axel, no worries I'm going to clean this up and remove stuff from EventDispatcher again...

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15417 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/View.cpp

@@ -47,9 +47,12 @@
 #endif
 
 #include <math.h>
+#include <new>
 #include <stdio.h>
 
 
+using std::nothrow;
+
 //#define DEBUG_BVIEW
 #ifdef DEBUG_BVIEW
 #	include <stdio.h>
@@ -1261,17 +1264,21 @@ BView::DragMessage(BMessage *message, BRect dragRect, BHandler *replyTo)
 #endif
 
 	int32 bufferSize = message->FlattenedSize();
-	char *buffer = new char[bufferSize];
-	message->Flatten(buffer, bufferSize);
-
-	fOwner->fLink->StartMessage(AS_LAYER_DRAG_RECT);
-	fOwner->fLink->Attach<BRect>(dragRect);
-	fOwner->fLink->Attach<BPoint>(offset);	
-	fOwner->fLink->Attach<int32>(bufferSize);
-	fOwner->fLink->Attach(buffer, bufferSize);
-	fOwner->fLink->Flush();
-
-	delete [] buffer;
+	char* buffer = new (nothrow) char[bufferSize];
+	if (buffer) {
+		message->Flatten(buffer, bufferSize);
+	
+		fOwner->fLink->StartMessage(AS_LAYER_DRAG_RECT);
+		fOwner->fLink->Attach<BRect>(dragRect);
+		fOwner->fLink->Attach<BPoint>(offset);	
+		fOwner->fLink->Attach<int32>(bufferSize);
+		fOwner->fLink->Attach(buffer, bufferSize);
+		fOwner->fLink->Flush();
+	
+		delete [] buffer;
+	} else {
+		fprintf(stderr, "BView::DragMessage() - no memory to flatten drag message\n");
+	}
 }
 
 
@@ -1318,17 +1325,21 @@ BView::DragMessage(BMessage *message, BBitmap *image,
 #endif
 
 	int32 bufferSize = message->FlattenedSize();
-	char *buffer = new char[bufferSize];
-	message->Flatten(buffer, bufferSize);
-
-	fOwner->fLink->StartMessage(AS_LAYER_DRAG_IMAGE);
-	fOwner->fLink->Attach<int32>(image->get_server_token());
-	fOwner->fLink->Attach<int32>((int32)dragMode);
-	fOwner->fLink->Attach<BPoint>(offset);
-	fOwner->fLink->Attach<int32>(bufferSize);
-	fOwner->fLink->Attach(buffer, bufferSize);
-
-	delete [] buffer;
+	char* buffer = new (nothrow) char[bufferSize];
+	if (buffer) {
+		message->Flatten(buffer, bufferSize);
+	
+		fOwner->fLink->StartMessage(AS_LAYER_DRAG_IMAGE);
+		fOwner->fLink->Attach<int32>(image->get_server_token());
+		fOwner->fLink->Attach<int32>((int32)dragMode);
+		fOwner->fLink->Attach<BPoint>(offset);
+		fOwner->fLink->Attach<int32>(bufferSize);
+		fOwner->fLink->Attach(buffer, bufferSize);
+	
+		delete [] buffer;
+	} else {
+		fprintf(stderr, "BView::DragMessage() - no memory to flatten drag message\n");
+	}
 
 	// TODO: in app_server the bitmap refCount must be incremented
 	// WRITE this into specs!!!!
@@ -4146,7 +4157,7 @@ BView::_Draw(BRect updateRect)
 		child->_Draw(rect);
 	}
 
-	if (Flags() & B_WILL_DRAW) {
+	if (Flags() & B_DRAW_ON_CHILDREN) {
 		// TODO: Since we have hard clipping in the app_server,
 		// a view can never draw "on top of it's child views" as
 		// the BeBook describes.

src/kits/interface/Window.cpp

@@ -868,11 +868,21 @@ BWindow::DispatchMessage(BMessage *msg, BHandler *target)
 			msg->FindPoint("be:view_where", &where);
 			msg->FindInt32("buttons", (int32 *)&buttons);
 			msg->FindInt32("be:transit", (int32 *)&transit);
+			BMessage* dragMessage = NULL;
+			if (msg->HasMessage("be:drag_message")) {
+				dragMessage = new BMessage();
+				if (msg->FindMessage("be:drag_message", dragMessage) != B_OK) {
+					delete dragMessage;
+					dragMessage = NULL;
+				}
+			}
 
 			if (BView *view = dynamic_cast<BView *>(target))
-				view->MouseMoved(where, transit, NULL);
+				view->MouseMoved(where, transit, dragMessage);
 			else
 				target->MessageReceived(msg);
+
+			delete dragMessage;
 			break;
 		}
 
@@ -976,6 +986,20 @@ BWindow::DispatchMessage(BMessage *msg, BHandler *target)
 				msg->SendReply(B_MESSAGE_NOT_UNDERSTOOD);
 			break;
 		}
+		case _MESSAGE_DROPPED_:
+		{
+			if (fLastMouseMovedView)
+				target = fLastMouseMovedView;
+
+			uint32 originalWhat;
+			if (msg->FindInt32("_original_what", (int32*)&originalWhat) == B_OK) {
+				msg->what = originalWhat;
+				msg->RemoveName("_original_what");
+			}
+
+			BLooper::DispatchMessage(msg, target); 
+			break;
+		}
 
 		default:
 			BLooper::DispatchMessage(msg, target); 
@@ -2387,8 +2411,8 @@ BWindow::_AdoptResize()
 	// saves us some server communication, as the server
 	// does the same with our views on its side.
 
-	int32 deltaWidth = fFrame.Width() - fTopView->Bounds().Width();
-	int32 deltaHeight = fFrame.Height() - fTopView->Bounds().Height();
+	int32 deltaWidth = (int32)(fFrame.Width() - fTopView->Bounds().Width());
+	int32 deltaHeight = (int32)(fFrame.Height() - fTopView->Bounds().Height());
 	if (deltaWidth == 0 && deltaHeight == 0)
 		return;