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Re: Tips & Tricks Thread
Posted: March 3rd, 2012, 7:05 pm
by smurfier
Because....
Table={Index=Value}
If you do not specify an index, a number is used.
So... Table={'One';'Two';'Three'}
Is Really... Table={1='One';2='Two';3='Three'}
And for what we're doing we only want to use the Value portion.
Re: Tips & Tricks Thread
Posted: March 3rd, 2012, 7:10 pm
by jsmorley
smurfier wrote:Because....
Table={Index=Value}
If you do not specify an index, a number is used.
So... Table={'One';'Two';'Three'}
Is Really... Table={1='One';2='Two';3='Three'}
And for what we're doing we only want to use the Value portion.
Yeah, that makes sense.
Re: Tips & Tricks Thread
Posted: March 3rd, 2012, 9:43 pm
by smurfier
This function allows the use of Rainmeter style substitute strings inside Lua.
Code: Select all
function Substitute(Val,Sub)
Val=tostring(Val)
Sub='"'..string.gsub(Sub,'%[','%%%[')..'"'
local Strip=function(a) return string.match(a,'^[\'"](.*)[\'"]$') or '' end
for a in string.gmatch(Sub,'[^,]+') do
local l,r=string.match(a,'(.*):(.*)')
Val=string.gsub(Val,Strip(l),Strip(r))
end
return Val
end
The substitute string must follow all of Lua's string rules. This includes using the escape character \ when necessary.
Re: Tips & Tricks Thread
Posted: May 18th, 2012, 1:17 am
by smurfier
Bars, Roundlines, Lines, and Histograms all need to be bound to a measure. This makes it a bit difficult to set their values from Lua. The solution is actually rather simple. Just create a Calc Measure in Rainmeter and use
!SetOption Measure Formula NumberValue to drive the meter.
If you're using this method with several Meters it may be easier to just grab the MeasureName from the meter. This function makes that a bit easier.
Code: Select all
function SetValue(Meter,Value)
local mHandle=assert(SKIN:GetMeter(Meter),'Invalid Meter '..Meter)
local MeasureName=assert(mHandle:GetOption('MeasureName'),'MeasureName not found in '..Meter)
if assert(SKIN:GetMeasure(MeasureName),'Invalid Measure '..MeasureName) then
SKIN:Bang('!SetOption',MeasureName,'Formula',Value)
SKIN:Bang('!UpdateMeasure',MeasureName)
end
end -- SetValue
Re: Tips & Tricks Thread
Posted: June 18th, 2012, 8:06 pm
by smurfier
This function will apply your current timezone and daylight savings time to a Date and Time in the GMT timezone. Simply pass it the year, month, day, hour, minute and second and it will return a date formatted table. The last argument that you can send is an optional timezone, such as -6 for Central Standard Time.
Code: Select all
function TimeStamp(y,m,d,h,mn,s,t)
local Time=os.date('*t')
local offset=t and t*3600 or os.time()-os.time(os.date('!*t'))
local t=os.time({day=d,month=m,year=y,hour=h,min=mn,sec=s})+offset+(Time.isdst and 3600 or 0)
return os.date('*t',t)
end
Re: Tips & Tricks Thread
Posted: July 1st, 2012, 1:09 am
by smurfier
This function serves as a very simple replacement for !WriteKeyValue when you need to write to an ini outside of the skins folder, as well as when you need to write an Environment Variable without Rainmeter expanding it.
Code: Select all
function WriteIni(file,section,key,value)
local hFile=io.input(file,'r')
if not io.type(hFile)=='file' then
print('Cannot open file: '..file)
else
local Text=io.read('*all')
hFile=io.output(file,'w')
local NewText=string.gsub(Text,
'%['..section..']([^%[]+)',
function(a)
if string.match(a,'\n%s-'..key..'%s-=') then
a=string.gsub(a,'\n%s-'..key..'%s-=%s-([^;\n]+)','\n'..key..'='..value)
else
a=(string.match(a,'(.+)\n$') or '')..'\n'..key..'='..value..'\n\n'
end
return '['..section..']'..a
end
)
io.write(NewText)
io.close(hFile)
end
end
Limitations:
- You may not use Key=[Value] with the brackets in the target section.
- The function is case sensitive.
- Since it's Lua, no unicode.
If a Key=Value pair does not exist, it is created at the end of the section.
Re: Tips & Tricks Thread
Posted: August 30th, 2012, 8:22 pm
by Kaelri
Here's a simple way to make your script "watch" some value in the skin - for example, a variable - and take some action only on updates when the value has changed.
Code: Select all
function Initialize()
Old = nil
end
function Update()
local New = SKIN:GetVariable('SomeVar')
if Old ~= New then
-- do stuff
Old = New
end
end
Re: Tips & Tricks Thread
Posted: September 13th, 2012, 10:55 am
by Mordasius
You can't mix left, right and center justification in a single meter with native Rainmeter but you can by using
string.format in a LUA script. In following example [MeterNetIn] displays a left justified label and a right justified download speed.
Code: Select all
[MeasureNetIn]
Measure=NetIn
[mLuaScript]
Measure=Script
ScriptFile=LuaScriptFile.lua
[MeterNetIn]
Meter=STRING
FontFace=Consolas
LuaScriptFile.lua:
Code: Select all
function Initialize()
msNumber = SKIN:GetMeasure('MeasureNetIn')
end
function Update()
SKIN:Bang('!SetOption', 'MeterNetIn', 'Text', string.format("%-15s %5d %-s", "Download:", msNumber:GetValue()/1000, "kB/s") )
end
simple.jpg
The above replaces just one string meter with a LUA script but the method really comes into its own if you need to display a table or list of items that requires a mix of left, right and/or center justification for strings and numbers all on the same line. The screenshot below shows the output of 12 string meters formated with:
Code: Select all
for n, s in ipairs(StreamsByViewer) do
SKIN:Bang('!SetOption','MeterStream'..n..'','Text',string.format("%-8s %-20s %5d %-6s %-10s",s.stream.Type,s.stream.Owner, s.stream.Viewers,center(s.stream.Races,7),center(s.stream.Rating,10)))
end
Formating_wid_LUA.jpg
There is a summary of the formating directives for string.format in the
LUA 5.1 Quick Guide. They are biased toward numerical output but it's fairly easy to add your own string formating functions like the center function above which is:
Code: Select all
function center(str, width)
return string.rep(' ',math.floor( (width - string.len(str))/2 ))..str
end
The most serious limitation to the use of string.format is that it only formats text correctly with monospaced fonts like Courier or Consolas.
Re: Tips & Tricks Thread
Posted: September 13th, 2012, 4:31 pm
by Alex Becherer
pretty cool
Re: Tips & Tricks Thread
Posted: September 13th, 2012, 5:27 pm
by thatsIch
A simple "Pretty Printer" of Lua Tables in JSON format
Code: Select all
function printTableHelper(t,spacing)
local spacing = spacing or ''
local result = spacing .. "{\n"
for k,v in pairs(t) do
if type(v)=='table' then
result = result .. printTableHelper(v,spacing..'\t') ..",\n"
else
result = result .. spacing .. "\t[\"" .. tostring(k) .. "\"] = \"" .. v .. "\",\n"
end
end
result = result .. spacing .. "}"
return result
end
Usage
Code: Select all
printTableHelper({{"a"},{"b"}})
>
{
{
["1"] = "a",
},
{
["2"] = "b",
},
}