From 2597e69f29a4b603cbfc7d53d034a2a9d3405de4 Mon Sep 17 00:00:00 2001
From: Bastien Bouclet
Date: Sat, 22 Jul 2017 16:28:53 +0200
Subject: MOHAWK: Myst: Fix Selenitic sound receiver buttons not flashing

The new screen update strategy does not allow scripts to draw twice at
the same location for blinking.
---
 engines/mohawk/myst_stacks/selenitic.cpp | 23 +++++++++++++++++++----
 engines/mohawk/myst_stacks/selenitic.h   |  1 +
 2 files changed, 20 insertions(+), 4 deletions(-)

(limited to 'engines/mohawk/myst_stacks')

diff --git a/engines/mohawk/myst_stacks/selenitic.cpp b/engines/mohawk/myst_stacks/selenitic.cpp
index 087143abfc..e9439047ff 100644
--- a/engines/mohawk/myst_stacks/selenitic.cpp
+++ b/engines/mohawk/myst_stacks/selenitic.cpp
@@ -44,6 +44,7 @@ Selenitic::Selenitic(MohawkEngine_Myst *vm) :
 
 	_soundReceiverDirection = 0;
 	_soundReceiverStartTime = 0;
+	_soundReceiverNearBlinkCounter = 0;
 }
 
 Selenitic::~Selenitic() {
@@ -990,13 +991,26 @@ uint16 Selenitic::soundReceiverCurrentSound(uint16 source, uint16 position) {
 		if (position == solution) {
 			soundId = soundIdGood;
 		} else if (position > solution && position <= solution + 50) {
-			_soundReceiverLeftButton->drawConditionalDataToScreen(2);
-			_soundReceiverLeftButton->drawConditionalDataToScreen(0);
+			_soundReceiverNearBlinkCounter++;
+			if (_soundReceiverNearBlinkCounter % 2) {
+				_soundReceiverLeftButton->drawConditionalDataToScreen(2);
+			} else {
+				_soundReceiverLeftButton->drawConditionalDataToScreen(0);
+			}
 			soundId = soundIdNear;
 		} else if (position < solution && position >= solution - 50) {
-			_soundReceiverRightButton->drawConditionalDataToScreen(2);
-			_soundReceiverRightButton->drawConditionalDataToScreen(0);
+			_soundReceiverNearBlinkCounter++;
+			if (_soundReceiverNearBlinkCounter % 2) {
+				_soundReceiverRightButton->drawConditionalDataToScreen(2);
+			} else {
+				_soundReceiverRightButton->drawConditionalDataToScreen(0);
+			}
 			soundId = soundIdNear;
+		} else if (_soundReceiverNearBlinkCounter > 0) {
+			// Make sure the buttons don't stay highlighted when leaving the 'near' area
+			_soundReceiverRightButton->drawConditionalDataToScreen(0);
+			_soundReceiverLeftButton->drawConditionalDataToScreen(0);
+			_soundReceiverNearBlinkCounter = 0;
 		}
 	}
 
@@ -1053,6 +1067,7 @@ void Selenitic::o_soundReceiver_init(uint16 var, const ArgumentsArray &args) {
 	soundReceiverSetSubimageRect();
 
 	_soundReceiverSigmaPressed = false;
+	_soundReceiverNearBlinkCounter = 0;
 }
 
 void Selenitic::o_soundLock_init(uint16 var, const ArgumentsArray &args) {
diff --git a/engines/mohawk/myst_stacks/selenitic.h b/engines/mohawk/myst_stacks/selenitic.h
index e0b4564bb9..341886d20b 100644
--- a/engines/mohawk/myst_stacks/selenitic.h
+++ b/engines/mohawk/myst_stacks/selenitic.h
@@ -86,6 +86,7 @@ private:
 	uint16 _soundReceiverDirection; // 120
 	uint16 _soundReceiverSpeed; // 122
 	uint32 _soundReceiverStartTime; //124
+	uint _soundReceiverNearBlinkCounter;
 	MystAreaImageSwitch *_soundReceiverViewer; // 128
 	MystAreaImageSwitch *_soundReceiverRightButton; // 132
 	MystAreaImageSwitch *_soundReceiverLeftButton; // 136
-- 
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