From a00a45125e6d4b9517cae05994121b8a7bd17060 Mon Sep 17 00:00:00 2001
From: Rodrigo Braz Monteiro <zeratul@cellosoft.com>
Date: Sun, 5 Mar 2006 23:41:00 +0000
Subject: [PATCH] Audio display now follows the play cursor

Originally committed to SVN as r211.
---
 core/audio_display.cpp | 39 +++++++++++++++++++++++++++++++--------
 core/changelog.txt     |  2 +-
 core/options.cpp       |  1 +
 3 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/core/audio_display.cpp b/core/audio_display.cpp
index 425294a46..ac9ee86fd 100644
--- a/core/audio_display.cpp
+++ b/core/audio_display.cpp
@@ -1479,19 +1479,42 @@ void AudioDisplay::OnUpdateTimer(wxTimerEvent &event) {
 		if (curPos > player->GetStartPosition() && curPos < player->GetEndPosition()) {
 			// Scroll if needed
 			int posX = GetXAtSample(curPos);
-			if (posX > w-80) {
-				UpdatePosition(curPos - samples/2 - 80,true);
-				UpdateImage();
-				Refresh(true);
+			bool fullDraw = false;
+			bool centerLock = Options.AsBool(_T("Audio lock scroll on cursor"));
+			if (centerLock) {
+				int goTo = MAX(0,curPos - w*samples/2);
+				if (goTo >= 0) {
+					UpdatePosition(goTo,true);
+					UpdateImage();
+					fullDraw = true;
+				}
+			}
+			else {
+				if (posX < 80 || posX > w-80) {
+					int goTo = MAX(0,curPos - 80*samples);
+					if (goTo >= 0) {
+						UpdatePosition(goTo,true);
+						UpdateImage();
+						fullDraw = true;
+					}
+				}
 			}
 
 			// Draw cursor
 			wxMemoryDC src;
-			src.SelectObject(*origImage);
-			dc.Blit(oldCurPos,0,1,h,&src,oldCurPos,0);
-			dc.SetPen(wxPen(Options.AsColour(_T("Audio Play cursor"))));
 			curpos = GetXAtSample(curPos);
-			dc.DrawLine(curpos,0,curpos,h);
+			dc.SetPen(wxPen(Options.AsColour(_T("Audio Play cursor"))));
+			src.SelectObject(*origImage);
+			if (fullDraw) {
+				//dc.Blit(0,0,w,h,&src,0,0);
+				dc.DrawLine(curpos,0,curpos,h);
+				//dc.Blit(0,0,curpos-10,h,&src,0,0);
+				//dc.Blit(curpos+10,0,w-curpos-10,h,&src,curpos+10,0);
+			}
+			else {
+				dc.Blit(oldCurPos,0,1,h,&src,oldCurPos,0);
+				dc.DrawLine(curpos,0,curpos,h);
+			}
 		}
 		else {
 			if (curPos > player->GetEndPosition() + 8192) {
diff --git a/core/changelog.txt b/core/changelog.txt
index f769d2287..9e03067bf 100644
--- a/core/changelog.txt
+++ b/core/changelog.txt
@@ -63,7 +63,7 @@ Please visit http://aegisub.net to download latest version
 - Select lines dialog now has an option on how to deal with comment lines. (Pomyk)
 - Last folder for all the file selection dialogs are now remembered in config.dat. (Pomyk)
 - Audio current play position cursor will now always be visible. (AMZ)
-- Removed video frame/subtitles time sync controls from the grid context menu.
+- Removed video frame/subtitles time sync controls from the grid context menu. (AMZ)
 
 
 = 1.09 beta - 2006.01.16 ===========================
diff --git a/core/options.cpp b/core/options.cpp
index 0b57a39f7..9d66b21b8 100644
--- a/core/options.cpp
+++ b/core/options.cpp
@@ -174,6 +174,7 @@ void OptionsManager::LoadDefaults() {
 	SetInt(_T("Audio Display Height"),100);
 	SetInt(_T("Timing Default Duration"), 2000);
 	SetBool(_T("Audio Wheel Default To Zoom"),false);
+	SetBool(_T("Audio lock scroll on cursor"),false);
 	
 	SetBool(_T("Audio Spectrum"),false);
 	SetInt(_T("Audio Spectrum Cutoff"),32);