piano小程序支持shift/ctrl升降半音，左右alt变调，补充更多键位

parts/scenes/app_piano.lua

@@ -3,17 +3,19 @@ local kb=love.keyboard
 
 local instList={'lead','bell','bass'}
 local keys={
-    ['1']='C6',['2']='D6',['3']='E6',['4']='F6',['5']='G6',['6']='A6',['7']='B6',['8']='C7',['9']='D7',['0']='E7',['-']='F7',['=']='G7',
-    ['q']='C5',['w']='D5',['e']='E5',['r']='F5',['t']='G5',['y']='A5',['u']='B5',['i']='C6',['o']='D6',['p']='E6',['[']='F6',[']']='G6',['\\']='A6',
-    ['a']='C4',['s']='D4',['d']='E4',['f']='F4',['g']='G4',['h']='A4',['j']='B4',['k']='C5',['l']='D5',[';']='E5',["'"]='F5',
-    ['z']='C3',['x']='D3',['c']='E3',['v']='F3',['b']='G3',['n']='A3',['m']='B3',[',']='C4',['.']='D4',['/']='E4',
+    ['1']=61,['2']=63,['3']=65,['4']=66,['5']=68,['6']=70,['7']=72,['8']=73,['9']=75,['0']=77,['-']=78,['=']=80,['backspace']=82,
+    ['q']=49,['w']=51,['e']=53,['r']=54,['t']=56,['y']=58,['u']=60,['i']=61,['o']=63,['p']=65,['[']=66,[']']=68,['\\']=70,
+    ['a']=37,['s']=39,['d']=41,['f']=42,['g']=44,['h']=46,['j']=48,['k']=49,['l']=51,[';']=53,["'"]=54,['return']=56,
+    ['z']=25,['x']=27,['c']=29,['v']=30,['b']=32,['n']=34,['m']=36,[',']=37,['.']=39,['/']=41,
 }
 local inst
+local offset
 
 local scene={}
 
 function scene.sceneInit()
     inst='lead'
+    offset=0
 end
 
 function scene.touchDown(x,y,k)
@@ -22,16 +24,20 @@ end
 scene.mouseDown=scene.touchDown
 
 function scene.keyDown(key,isRep)
-    if isRep then return end
-    if key=='tab'then
+    if not isRep and keys[key]then
+        local note=keys[key]+offset
+        if kb.isDown('lshift','rshift')then note=note+1 end
+        if kb.isDown('lctrl','rctrl')then note=note-1 end
+        SFX.playSample(inst,note)
+        TEXT.show(SFX.getNoteName(note),math.random(150,1130),math.random(140,500),60,'score',.8)
+    elseif key=='tab'then
         inst=TABLE.next(instList,inst)
-    else
-        local note=keys[key]
-        if note then
-            if kb.isDown('lshift','rshift')then note=note:sub(1,1)..'#'..note:sub(2,2)end
-            SFX.playSample(inst,note)
-            TEXT.show(note,math.random(150,1130),math.random(140,500),60,'score',.8)
-        end
+    elseif key=='lalt'then
+        offset=math.max(offset-1,-12)
+    elseif key=='ralt'then
+        offset=math.min(offset+1,12)
+    elseif key=='escape'then
+        SCN.back()
     end
 end
 
@@ -42,6 +48,7 @@ end
 function scene.draw()
     setFont(30)
     gc.print(inst,40,60)
+    gc.print(offset,40,100)
 end
 
 scene.widgetList={