【lua教程】仿一个木函尺子
require "import"import "android.app.*"
import "android.os.*"
import "android.widget.*"
import "android.view.*"
import "com.androlua.*"
import "android.graphics.*"
--仿一个木函尺子功能，代码有点乱。
--想做个吸附功能
--各种单位之间转换函数
function dpTopx(sdp)
import "android.util.TypedValue"
dm=this.getResources().getDisplayMetrics()
types={px=0,dp=1,sp=2,pt=3,["in"]=4,mm=5}
n,ty=sdp:match("^(%-?[%.%d]+)(%a%a)$")
return TypedValue.applyDimension(types,tonumber(n),dm)
end
mm=dpTopx("1mm")
activity.setContentView(loadlayout({
FrameLayout,
layout_height="fill";
layout_width="fill";
{
LinearLayout;
orientation="vertical";
layout_height="fill";
layout_width="fill";
Gravity="center|top",
{
TextView;
layout_height="300",
layout_width="fill",
layout_marginLeft="30",
id="tv",
};
},
{
LinearLayout,
layout_height="fill",
layout_width="fill",
Gravity="center",
{
TextView,
layout_height="300",
layout_width="300",
text=tostring(0),
Gravity="center",
textColor="#ffffff",
textSize="60",
id="tv4",
},
},
{
LinearLayout,
layout_height="fill",
layout_width="fill",
Gravity="center",
{
TextView,
layout_height="300",
layout_width="300",
text=tostring(0),
Gravity="center",
paddingTop="150",
paddingLeft="150",
textColor="#ffffff",
textSize="30",
id="tv5",
},
},
{
LinearLayout,
orientation="vertical",
layout_height="fill",
layout_width="fill",
id="tv2",
{
LinearLayout,
layout_height="fill",
layout_width=mm*2,
Gravity="center",
layout_marginLeft="30"+mm,
id="tv3",
{
TextView,
layout_height="fill",
layout_width="4",
background="#808080",
},
},
},
}))
--横屏模式
activity.setRequestedOrientation(0);
myLuaDrawable=LuaDrawable(function(mCanvas,mPaint,mDrawable)
--画笔属性
mPaint.setColor(0xFF9C9A9D)
mPaint.setAntiAlias(true)
mPaint.setStrokeWidth(2)
mPaint.setStyle(Paint.Style.FILL)
mPaint.setStrokeCap(Paint.Cap.ROUND)
mPaint.setTextSize(28)
MaxPx=mDrawable.getBounds().right-30
MaxMm=math.ceil(MaxPx/100)
--mCanvas.drawColor(0xffffeeaa)
for i=0,MaxMm*10 do
if i%10==0 then
mCanvas.drawLine(mm*i+mm,0,mm*i+mm,80,mPaint)
mCanvas.drawText(tostring(math.modf(i/10)),(mm*i+mm)-mm/2 ,120, mPaint)
elseif i%5==0 then
mCanvas.drawLine(mm*i+mm,0,mm*i+mm,60,mPaint)
else
mCanvas.drawLine(mm*i+mm,0,mm*i+mm,40,mPaint)
end
end
end)
--绘制的Drawble设置成控件背景
tv.background=myLuaDrawable
tv2.onTouch=function(v,e)
a=e.getAction()&255
switch a
case MotionEvent.ACTION_DOWN
case MotionEvent.ACTION_MOVE
moveX=e.getX()
tv3.setTranslationX(moveX)
--print("≈"..math.floor(moveX/mw).."mm")
a=math.floor((moveX/mm)/10)
--向上取整
tv4.Text=tostring(math.floor((moveX/mm)/10))
--向上取整
tv5.Text=tostring(math.floor(moveX/mm)-a*10)
case MotionEvent.ACTION_UP
end
return true
end
myLuaDrawable2=LuaDrawable(function(mCanvas,mPaint,mDrawable)
--画笔属性
mPaint.setColor(0xFF636562)
mPaint.setAntiAlias(true)
mPaint.setStrokeWidth(20)
mPaint.setStyle(Paint.Style.STROKE)
--mCanvas.drawColor(0xffffeeaa)
mCanvas.drawCircle(150, 150, 100, mPaint);
mPaint.setColor(0xFF9C9A9D)
mPaint.setStyle(Paint.Style.FILL)
mCanvas.drawCircle(150, 150, 90, mPaint);
end)
--绘制的Drawble设置成控件背景
tv4.background=myLuaDrawable2
myLuaDrawable3=LuaDrawable(function(mCanvas,mPaint,mDrawable)
--画笔属性
mPaint.setColor(0xFF434542)
mPaint.setAntiAlias(true)
mPaint.setStrokeWidth(20)
mPaint.setStyle(Paint.Style.FILL)
mCanvas.drawCircle(225, 225, 50, mPaint);
end)
tv5.background=myLuaDrawable3
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