From 2b0640f15d628202b9c7c778069d361ab54e0a82 Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Fri, 19 Aug 2016 12:24:05 -0300
Subject: [PATCH] eeshow/gui/: in diff_old, use sheet from old_hist for AoIs

---
 eeshow/gui/gui.c   | 23 ++++++++++++++++++-----
 eeshow/gui/sheet.c |  8 ++++++++
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/eeshow/gui/gui.c b/eeshow/gui/gui.c
index 49d2016..3a66c9a 100644
--- a/eeshow/gui/gui.c
+++ b/eeshow/gui/gui.c
@@ -85,12 +85,25 @@ static void select_subsheet(void *user)
 
 	if (!obj->u.sheet.sheet)
 		return;
-	for (sheet = ctx->new_hist->sheets; sheet; sheet = sheet->next)
-		if (sheet->sch == obj->u.sheet.sheet) {
-			go_to_sheet(ctx, sheet);
-			return;
-		}
+
+	if (!ctx->old_hist || ctx->diff_mode != diff_old) {
+		for (sheet = ctx->new_hist->sheets; sheet; sheet = sheet->next)
+			if (sheet->sch == obj->u.sheet.sheet) {
+				go_to_sheet(ctx, sheet);
+				return;
+			}
+		abort();
+	}
+
+	for (sheet = ctx->old_hist->sheets; sheet; sheet = sheet->next)
+		if (sheet->sch == obj->u.sheet.sheet)
+			goto found;
 	abort();
+
+found:
+	sheet = find_corresponding_sheet(ctx->new_hist->sheets,
+                    ctx->old_hist->sheets, sheet);
+	go_to_sheet(ctx, sheet);
 }
 
 
diff --git a/eeshow/gui/sheet.c b/eeshow/gui/sheet.c
index 5385850..9736bf4 100644
--- a/eeshow/gui/sheet.c
+++ b/eeshow/gui/sheet.c
@@ -367,6 +367,10 @@ static bool sheet_click(void *user, int x, int y)
 
 	canvas_coord(ctx, x, y, &ex, &ey);
 
+	if (ctx->old_hist && ctx->diff_mode == diff_old)
+		curr_sheet = find_corresponding_sheet(ctx->old_hist->sheets,
+		    ctx->new_hist->sheets, ctx->curr_sheet);
+
 	if (aoi_click(ctx->aois, x, y))
 		return 1;
 	if (aoi_click(curr_sheet->aois,
@@ -388,6 +392,10 @@ static bool sheet_hover_update(void *user, int x, int y)
 
 	canvas_coord(ctx, x, y, &ex, &ey);
 
+	if (ctx->old_hist && ctx->diff_mode == diff_old)
+		curr_sheet = find_corresponding_sheet(ctx->old_hist->sheets,
+		    ctx->new_hist->sheets, ctx->curr_sheet);
+
 	if (aoi_hover(ctx->aois, x, y))
 		return 1;
 	return aoi_hover(curr_sheet->aois,