新增piano小程序（目前只支持键盘操作）

parts/scenes/app_console.lua

@@ -611,6 +611,11 @@ local commands={}do
                 scene='app_arithmetic',
                 description="Arithmetic"
             },
+            {
+                code="piano",
+                scene='app_piano',
+                description="A simple keyboard piano"
+            },
         }
         commands.app={
             code=function(name)

parts/scenes/app_piano.lua

@@ -0,0 +1,50 @@
+local gc=love.graphics
+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',
+}
+local inst
+
+local scene={}
+
+function scene.sceneInit()
+    inst='lead'
+end
+
+function scene.touchDown(x,y,k)
+
+end
+scene.mouseDown=scene.touchDown
+
+function scene.keyDown(key,isRep)
+    if isRep then return end
+    if 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
+    end
+end
+
+function scene.update(dt)
+
+end
+
+function scene.draw()
+    setFont(30)
+    gc.print(inst,40,60)
+end
+
+scene.widgetList={
+    WIDGET.newButton{name="back", x=1140,y=640,w=170,h=80,fText=CHAR.icon.back,code=backScene},
+}
+return scene