显示即将解锁的关卡 closes #194 (#198)

* 显示即将解锁的关卡， closes #194

除了中文和英文之外的语言我还没处理。

* 成绩从Grade改为Rank

parts/scenes/mode.lua

@@ -30,6 +30,15 @@ local scene={}
 function scene.sceneInit(org)
 	BG.set()
 	mapCam.zoomK=org=='main'and 5 or 1
+	VisibleModes = {}  -- 1 for unlocked, 2 for locked but visible
+	for name,M in next,MODES do
+		if RANKS[name]and M.unlock and M.x then
+			VisibleModes[name] = 1
+			for _=1,#M.unlock do
+				VisibleModes[M.unlock[_]] = VisibleModes[M.unlock[_]] or 2
+			end
+		end
+	end
 end
 
 local function getK()
@@ -39,11 +48,9 @@ local function getPos()
 	return mapCam.xOy:inverseTransformPoint(0,0)
 end
 
-local function onMode(x,y)
-	x,y=x-640,y-360
-	x,y=mapCam.xOy:inverseTransformPoint(x,y)
+local function onModeRaw(x,y)
 	for name,M in next,MODES do
-		if RANKS[name]and M.x then
+		if VisibleModes[name]and M.x then
 			local s=M.size
 			if M.shape==1 then
 				if x>M.x-s and x<M.x+s and y>M.y-s and y<M.y+s then return name end
@@ -80,7 +87,9 @@ end
 function scene.mouseClick(x,y)
 	local _=mapCam.sel
 	if not _ or x<920 then
-		local SEL=onMode(x,y)
+		x,y=x-640,y-360
+		x,y=mapCam.xOy:inverseTransformPoint(x,y)
+		local SEL=onModeRaw(x,y)
 		if _~=SEL then
 			if SEL then
 				mapCam.moving=true
@@ -124,8 +133,12 @@ function scene.keyDown(key,isRep)
 	if isRep then return end
 	if key=="return"then
 		if mapCam.sel then
-			mapCam.keyCtrl=false
-			loadGame(mapCam.sel)
+			if VisibleModes[mapCam.sel] == 2 then
+				MES.new('info', text.unlockHint)
+			else
+				mapCam.keyCtrl=false
+				loadGame(mapCam.sel)
+			end
 		end
 	elseif key=="f1"then
 		SCN.go('mod')
@@ -164,22 +177,10 @@ function scene.update()
 		else
 			moveMap(dx,dy)
 			local x,y=getPos()
-			for name,M in next,MODES do
-				if RANKS[name]and M.x then
-					local SEL
-					local s=M.size
-					if M.shape==1 then
-						if x>M.x-s and x<M.x+s and y>M.y-s and y<M.y+s then SEL=name end
-					elseif M.shape==2 then
-						if abs(x-M.x)+abs(y-M.y)<s then SEL=name end
-					elseif M.shape==3 then
-						if(x-M.x)^2+(y-M.y)^2<s^2 then SEL=name end
-					end
-					if SEL and mapCam.sel~=SEL then
-						mapCam.sel=SEL
-						SFX.play('click')
-					end
-				end
+			local SEL = onModeRaw(x,y)
+			if SEL and mapCam.sel~=SEL then
+				mapCam.sel=SEL
+				SFX.play('click')
 			end
 		end
 	end
@@ -196,7 +197,7 @@ function scene.update()
 	end
 end
 
---D/C/B/A/S/special
+--No Rank/D/C/B/A/S/special/locked
 local baseRankColor={
 	[0]={0,0,0,.3},
 	{.4,.1,.1,.3},
@@ -205,6 +206,7 @@ local baseRankColor={
 	{.7,.75,.85,.3},
 	{.85,.8,.3,.3},
 	{.4,.7,.4,.3},
+	locked={.5,.5,.5,.9}
 }
 local rankColor=rankColor
 local function drawModeShape(M,S,drawType)
@@ -243,12 +245,12 @@ function scene.draw()
 	setFont(80)
 	gc_setLineWidth(4)
 	for name,M in next,MODES do
-		if R[name]then
+		if VisibleModes[name]then
 			local rank=R[name]
 			local S=M.size
 
 			--Draw shapes on map
-			gc_setColor(baseRankColor[rank])
+			gc_setColor(baseRankColor[rank or "locked"])
 			drawModeShape(M,S,'fill')
 			gc_setColor(1,1,sel==name and 0 or 1)
 			drawModeShape(M,S,'line')
@@ -262,12 +264,14 @@ function scene.draw()
 			end
 
 			--Rank
-			name=text.ranks[rank]
-			if name then
-				gc_setColor(0,0,0,.8)
-				mStr(name,M.x+M.size*.7,M.y-50-M.size*.7)
-				gc_setColor(rankColor[rank])
-				mStr(name,M.x+M.size*.7+4,M.y-50-M.size*.7-4)
+			if VisibleModes[name]==1 then
+				name=text.ranks[rank]
+				if name then
+					gc_setColor(0,0,0,.8)
+					mStr(name,M.x+M.size*.7,M.y-50-M.size*.7)
+					gc_setColor(rankColor[rank])
+					mStr(name,M.x+M.size*.7+4,M.y-50-M.size*.7-4)
+				end
 			end
 		end
 	end
@@ -292,7 +296,9 @@ function scene.draw()
 			gc_rectangle('fill',940,290,320,280,5)--Highscore board
 			local L=M.records
 			gc_setColor(1,1,1)
-			if L[1]then
+			if VisibleModes[sel] == 2 then
+				mText(drawableText.modeLocked,1100,370)
+			elseif L[1]then
 				for i=1,#L do
 					local t=M.scoreDisp(L[i])
 					local f=int((30-#t*.4)/5)*5