From f0d0ce7979d89ab67cb702326f900dc721aa01a4 Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Thu, 30 Dec 2004 14:21:16 +0000
Subject: Reduce time till scrolling starts inthe about dialog; pressing
 shift/alt now causes faster/reverse scrolling (this is an insider trick and
 not documented on purpose :-)

svn-id: r16383
---
 gui/about.cpp | 15 ++++++++++++---
 gui/about.h   |  1 +
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/gui/about.cpp b/gui/about.cpp
index 6ba1ec7474..4f4e932fb5 100644
--- a/gui/about.cpp
+++ b/gui/about.cpp
@@ -28,7 +28,7 @@
 namespace GUI {
 
 enum {
-	kScrollStartDelay = 2500,
+	kScrollStartDelay = 1500,
 	kScrollMillisPerPixel = 80,
 	
 	kXOff = 3,
@@ -82,7 +82,7 @@ static const char *credits_intro[] = {
 
 AboutDialog::AboutDialog()
 	: Dialog(10, 20, 300, 174),
-	_scrollPos(0), _scrollTime(0) {
+	_scrollPos(0), _scrollTime(0), _modifiers(0) {
 	
 	int i;
 	
@@ -194,6 +194,12 @@ void AboutDialog::handleTickle() {
 	const uint32 t = g_system->getMillis();
 	int scrollOffset = ((int)t - (int)_scrollTime) / kScrollMillisPerPixel;
 	if (scrollOffset > 0) {
+		// Scroll faster when shift is pressed
+		if (_modifiers & OSystem::KBD_SHIFT)
+			scrollOffset *= 4;
+		// Reverse scrolling when alt is pressed
+		if (_modifiers & OSystem::KBD_ALT)
+			scrollOffset *= -1;
 		_scrollPos += scrollOffset;
 		_scrollTime = t;
 
@@ -215,10 +221,13 @@ void AboutDialog::handleMouseUp(int x, int y, int button, int clickCount) {
 }
 
 void AboutDialog::handleKeyDown(uint16 ascii, int keycode, int modifiers) {
+	_modifiers = modifiers;
 }
 
 void AboutDialog::handleKeyUp(uint16 ascii, int keycode, int modifiers) {
-	close();
+	_modifiers = modifiers;
+	if (ascii)
+		close();
 }
 
 
diff --git a/gui/about.h b/gui/about.h
index 13ad79c7d6..094b8ec551 100644
--- a/gui/about.h
+++ b/gui/about.h
@@ -33,6 +33,7 @@ protected:
 	uint32		_scrollTime;
 	StringList	_lines;
 	uint32		_lineHeight;
+	byte		_modifiers;
 
 public:
 	AboutDialog();
-- 
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