Implement scrolling to the target address.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42213 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/debugger/user_interface/gui/inspector_window/MemoryView.cpp

@@ -73,6 +73,23 @@ MemoryView::SetTargetAddress(TeamMemoryBlock* block, target_addr_t address)
 }
 
 
+void
+MemoryView::ScrollToSelection()
+{
+	if (fTargetBlock != NULL) {
+		target_addr_t offset = fTargetAddress - fTargetBlock->BaseAddress();
+		int32 lineNumber = 0;
+		if (fHexBlocksPerLine > 0)
+			lineNumber = offset / (fHexBlocksPerLine * (1 << (fHexMode - 1)));
+		else if (fTextCharsPerLine > 0)
+			lineNumber = offset / fTextCharsPerLine;
+		float y = lineNumber * fLineHeight;
+		if (!Bounds().Contains(BPoint(0.0, y)))
+			ScrollTo(0.0, y);
+	}
+}
+
+
 void
 MemoryView::TargetedByScrollView(BScrollView* scrollView)
 {
@@ -231,6 +248,7 @@ MemoryView::MessageReceived(BMessage* message)
 		case MSG_TARGET_ADDRESS_CHANGED:
 		{
 			_RecalcScrollBars();
+			ScrollToSelection();
 			Invalidate();
 			break;
 		}

src/apps/debugger/user_interface/gui/inspector_window/MemoryView.h

@@ -45,9 +45,7 @@ public:
 
 			void				SetTargetAddress(TeamMemoryBlock* block,
 									target_addr_t address);
-
+			void				ScrollToSelection();
-			void				TargetAddressChanged(target_addr_t address);
-
 
 	virtual void				TargetedByScrollView(BScrollView* scrollView);