From cb9bf30dac4ddad8f6509000e57c009dc41002b2 Mon Sep 17 00:00:00 2001
From: Andrzej Rybczak <electricityispower@gmail.com>
Date: Sun, 11 Oct 2009 17:16:19 +0200
Subject: [PATCH] scrollpad: do not reset starting position automatically in
 Clear()

this allows for scrolling mpd server info screen, since the content
is changing slightly every second and starting position was reset
each time it'd been happening, scrolling was impossible. this also
'fixes' the issue in other screens like lyrics, artist info and help
that was reset if main window has been resized, which sometimes could
be very annoying.
---
 src/scrollpad.cpp | 10 ++++++++--
 src/scrollpad.h   |  4 ++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/scrollpad.cpp b/src/scrollpad.cpp
index c3eb26d5..ff146930 100644
--- a/src/scrollpad.cpp
+++ b/src/scrollpad.cpp
@@ -120,13 +120,15 @@ void Scrollpad::RemoveFormatting()
 
 void Scrollpad::Refresh()
 {
+	int MaxBeginning = itsRealHeight-itsHeight;
+	if (itsBeginning > MaxBeginning)
+		itsBeginning = MaxBeginning;
 	prefresh(itsWindow, itsBeginning, 0, itsStartY, itsStartX, itsStartY+itsHeight-1, itsStartX+itsWidth-1);
 }
 
 void Scrollpad::Resize(size_t new_width, size_t new_height)
 {
 	AdjustDimensions(new_width, new_height);
-	itsBeginning = 0;
 	itsRealHeight = itsHeight;
 	Flush();
 }
@@ -178,7 +180,6 @@ void Scrollpad::Scroll(Where where)
 
 void Scrollpad::Clear(bool clear_screen)
 {
-	itsBeginning = 0;
 	itsRealHeight = itsHeight;
 	itsBuffer.Clear();
 	wclear(itsWindow);
@@ -192,6 +193,11 @@ void Scrollpad::Clear(bool clear_screen)
 		Refresh();
 }
 
+void Scrollpad::Reset()
+{
+	itsBeginning = 0;
+}
+
 #ifdef _UTF8
 Scrollpad &Scrollpad::operator<<(const std::string &s)
 {
diff --git a/src/scrollpad.h b/src/scrollpad.h
index ec4d1857..0dbe1785 100644
--- a/src/scrollpad.h
+++ b/src/scrollpad.h
@@ -107,6 +107,10 @@ namespace NCurses
 			///
 			virtual void Clear(bool clear_screen = 1);
 			
+			/// Sets starting position to the beginning
+			///
+			void Reset();
+			
 			/// Template function that redirects all data passed
 			/// to the scrollpad window to its internal buffer
 			/// @param obj any object that has ostream &operator<<() defined