Refactor MomentumScroll to be more in line with other interface prefs

src/PowderToySDL.cpp

@@ -64,6 +64,7 @@ bool fullscreen = false;
 bool altFullscreen = false;
 bool forceIntegerScaling = true;
 bool resizable = false;
+bool momentumScroll = true;
 
 
 void ClipboardPush(ByteString text)
@@ -696,6 +697,7 @@ int main(int argc, char * argv[])
 	fullscreen = Client::Ref().GetPrefBool("Fullscreen", false);
 	altFullscreen = Client::Ref().GetPrefBool("AltFullscreen", false);
 	forceIntegerScaling = Client::Ref().GetPrefBool("ForceIntegerScaling", true);
+	momentumScroll = Client::Ref().GetPrefBool("MomentumScroll", true);
 
 
 	if(arguments["kiosk"] == "true")
@@ -785,6 +787,7 @@ int main(int argc, char * argv[])
 	ui::Engine::Ref().Fullscreen = fullscreen;
 	ui::Engine::Ref().SetAltFullscreen(altFullscreen);
 	ui::Engine::Ref().SetForceIntegerScaling(forceIntegerScaling);
+	ui::Engine::Ref().SetMomentumScroll(momentumScroll);
 
 	engine = &ui::Engine::Ref();
 	engine->SetMaxSize(desktopWidth, desktopHeight);

src/gui/interface/Engine.cpp

@@ -34,7 +34,8 @@ Engine::Engine():
 	mousexp_(0),
 	mouseyp_(0),
 	maxWidth(0),
-	maxHeight(0)
+	maxHeight(0),
+	momentumScroll(false)
 {
 }
 

src/gui/interface/Engine.h

@@ -119,6 +119,19 @@ namespace ui
 
 		int maxWidth;
 		int maxHeight;
+
+		bool momentumScroll;
+
+	public:
+		inline void SetMomentumScroll(bool newMomentumScroll)
+		{
+			momentumScroll = newMomentumScroll;
+		}
+
+		inline bool GetMomentumScroll() const
+		{
+			return momentumScroll;
+		}
 	};
 
 }

src/gui/interface/ScrollPanel.cpp

@@ -1,4 +1,5 @@
 #include "ScrollPanel.h"
+#include "Engine.h"
 
 #include "graphics/Graphics.h"
 
@@ -21,10 +22,8 @@ ScrollPanel::ScrollPanel(Point position, Point size):
 	scrollbarSelected(false),
 	scrollbarInitialYOffset(0),
 	scrollbarInitialYClick(0),
-	scrollbarClickLocation(0),
-	momentumScroll(false)
+	scrollbarClickLocation(0)
 {
-	momentumScroll = Client::Ref().GetPrefBool("MomentumScroll", true);
 }
 
 int ScrollPanel::GetScrollLimit()
@@ -46,7 +45,7 @@ void ScrollPanel::XOnMouseWheelInside(int localx, int localy, int d)
 {
 	if (!d)
 		return;
-	if (momentumScroll)
+	if (ui::Engine::Ref().GetMomentumScroll())
 		yScrollVel -= d * 2;
 	else
 		yScrollVel -= d * 20;
@@ -144,7 +143,7 @@ void ScrollPanel::XTick(float dt)
 	offsetX += xScrollVel;
 
 
-	if (momentumScroll)
+	if (ui::Engine::Ref().GetMomentumScroll())
 	{
 		if (yScrollVel > -0.5f && yScrollVel < 0.5)
 			yScrollVel = 0;

src/gui/interface/ScrollPanel.h

@@ -16,7 +16,6 @@ namespace ui
 		bool isMouseInsideScrollbar;
 		bool isMouseInsideScrollbarArea;
 		bool scrollbarSelected;
-		bool momentumScroll;
 		int scrollbarInitialYOffset;
 		int scrollbarInitialYClick;
 		int scrollbarClickLocation;

src/gui/options/OptionsModel.cpp

@@ -234,6 +234,7 @@ bool OptionsModel::GetMomentumScroll()
 void OptionsModel::SetMomentumScroll(bool state)
 {
 	Client::Ref().SetPref("MomentumScroll", state);
+	ui::Engine::Ref().SetMomentumScroll(state);
 	notifySettingsChanged();
 }