From 0215c110a592a9bbf6bf9ef6c5f161e8d704b9dc Mon Sep 17 00:00:00 2001
From: Rene Gollent <anevilyak@gmail.com>
Date: Thu, 16 Jun 2011 21:57:41 +0000
Subject: [PATCH] Implement scrolling to the target address.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42213 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../gui/inspector_window/MemoryView.cpp        | 18 ++++++++++++++++++
 .../gui/inspector_window/MemoryView.h          |  4 +---
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.cpp b/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.cpp
index 9a142fc240..8bc8776691 100644
--- a/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.cpp
+++ b/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;
 		}
diff --git a/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.h b/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.h
index 5565f61d16..74be46d8d5 100644
--- a/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.h
+++ b/src/apps/debugger/user_interface/gui/inspector_window/MemoryView.h
@@ -45,9 +45,7 @@ public:
 
 			void				SetTargetAddress(TeamMemoryBlock* block,
 									target_addr_t address);
-
-			void				TargetAddressChanged(target_addr_t address);
-
+			void				ScrollToSelection();
 
 	virtual void				TargetedByScrollView(BScrollView* scrollView);