From ba0b8895f89ff97f424371ff4efab48dbccc0e18 Mon Sep 17 00:00:00 2001
From: Milan Crha <mcrha@redhat.com>
Date: Thu, 1 Aug 2013 17:46:42 +0200
Subject: Bug #699603 - Message list scrolls to cursor on style change

---
 e-util/e-table-item.c | 15 +++++++++++++++
 e-util/e-table-item.h |  2 ++
 e-util/e-tree.c       | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+)

(limited to 'e-util')

diff --git a/e-util/e-table-item.c b/e-util/e-table-item.c
index ad6c0890f4..b8314dc777 100644
--- a/e-util/e-table-item.c
+++ b/e-util/e-table-item.c
@@ -4071,3 +4071,18 @@ e_table_item_is_editing (ETableItem *eti)
 
 	return eti_editing (eti);
 }
+
+/**
+ * e_table_item_cursor_scrolled:
+ * @eti: an %ETableItem 
+ *
+ * Does necessary recalculations after cursor scrolled, like whether
+ * the cursor is on screen or not anymore.
+ **/
+void
+e_table_item_cursor_scrolled (ETableItem *eti)
+{
+	g_return_if_fail (E_IS_TABLE_ITEM (eti));
+
+	eti_check_cursor_bounds (eti);
+}
diff --git a/e-util/e-table-item.h b/e-util/e-table-item.h
index 01e6a227dd..47ae5caa00 100644
--- a/e-util/e-table-item.h
+++ b/e-util/e-table-item.h
@@ -258,6 +258,8 @@ gint		e_table_item_row_diff		(ETableItem *eti,
 
 gboolean	e_table_item_is_editing		(ETableItem *eti);
 
+void		e_table_item_cursor_scrolled	(ETableItem *eti);
+
 G_END_DECLS
 
 #endif /* _E_TABLE_ITEM_H_ */
diff --git a/e-util/e-tree.c b/e-util/e-tree.c
index 42ec7aadb2..0bea168dc9 100644
--- a/e-util/e-tree.c
+++ b/e-util/e-tree.c
@@ -158,6 +158,8 @@ struct _ETreePrivate {
 
 	gint length_threshold;
 
+	GtkAdjustment *table_canvas_vadjustment;
+
 	/*
 	 * Configuration settings
 	 */
@@ -497,10 +499,16 @@ et_dispose (GObject *object)
 	priv->info_text_resize_id = 0;
 
 	if (priv->table_canvas != NULL) {
+		g_signal_handlers_disconnect_by_data (priv->table_canvas, object);
 		gtk_widget_destroy (GTK_WIDGET (priv->table_canvas));
 		priv->table_canvas = NULL;
 	}
 
+	if (priv->table_canvas_vadjustment) {
+		g_signal_handlers_disconnect_by_data (priv->table_canvas_vadjustment, object);
+		g_clear_object (&priv->table_canvas_vadjustment);
+	}
+
 	/* do not unref it, it was owned by priv->table_canvas */
 	priv->item = NULL;
 
@@ -1235,6 +1243,40 @@ table_canvas_focus_event_cb (GtkWidget *widget,
 	return TRUE;
 }
 
+static void
+e_tree_table_canvas_scrolled_cb (GtkAdjustment *vadjustment,
+				 GParamSpec *param,
+				 ETree *tree)
+{
+	g_return_if_fail (E_IS_TREE (tree));
+
+	if (tree->priv->item)
+		e_table_item_cursor_scrolled (E_TABLE_ITEM (tree->priv->item));
+}
+
+static void
+et_setup_table_canvas_vadjustment (ETree *tree)
+{
+	GtkAdjustment *vadjustment = NULL;
+
+	g_return_if_fail (E_IS_TREE (tree));
+
+	if (tree->priv->table_canvas_vadjustment) {
+		g_signal_handlers_disconnect_by_data (tree->priv->table_canvas_vadjustment, tree);
+		g_clear_object (&tree->priv->table_canvas_vadjustment);
+	}
+
+	if (tree->priv->table_canvas)
+		vadjustment = gtk_scrollable_get_vadjustment (
+			GTK_SCROLLABLE (tree->priv->table_canvas));
+
+	if (vadjustment) {
+		tree->priv->table_canvas_vadjustment = g_object_ref (vadjustment);
+		g_signal_connect (vadjustment, "notify::value",
+			G_CALLBACK (e_tree_table_canvas_scrolled_cb), tree);
+	}
+}
+
 static void
 e_tree_setup_table (ETree *e_tree)
 {
@@ -1281,6 +1323,10 @@ e_tree_setup_table (ETree *e_tree)
 		e_tree->priv->table_canvas, "reflow",
 		G_CALLBACK (tree_canvas_reflow), e_tree);
 
+	et_setup_table_canvas_vadjustment (e_tree);
+	g_signal_connect_swapped (e_tree->priv->table_canvas, "notify::vadjustment",
+		G_CALLBACK (et_setup_table_canvas_vadjustment), e_tree);
+
 	widget = GTK_WIDGET (e_tree->priv->table_canvas);
 	style = gtk_widget_get_style (widget);
 
-- 
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