-- Load external button/label library (ui.lua should be in the same folder as main.lua)
local ui = require("ui")
 
local currentLatitude = 0
local currentLongitude = 0
 
display.setStatusBar( display.HiddenStatusBar )
 
local background = display.newImage("gps_background.png")
 
 
local latitude = ui.newLabel{
        bounds = { 136, 51, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
local longitude = ui.newLabel{
        bounds = { 136, 101, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
local altitude = ui.newLabel{
        bounds = { 136, 151, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
local accuracy = ui.newLabel{
        bounds = { 136, 201, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
local speed = ui.newLabel{
        bounds = { 136, 251, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
        }
 
local direction = ui.newLabel{
        bounds = { 136, 301, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
local time = ui.newLabel{
        bounds = { 136, 351, 180, 40 },
        text = "--",
        font = "DBLCDTempBlack",
        textColor = { 255, 85, 85, 255 },
        size = 26,
        align = "left"
}
 
 
local buttonPress = function( event )
        -- Show location on map
        mapURL = "http://maps.google.com/maps?q=Hello,+Corona!@" .. currentLatitude .. "," .. currentLongitude
        system.openURL( mapURL )
end
 
 
local button1 = ui.newButton{
        default = "buttonRust.png",
        over = "buttonRustOver.png",
        onPress = buttonPress,
        text = "Show on Map",
        font = "TrebuchetMS-Bold",
        size = 22,
        textColor = { 200, 200, 200, 255 },
        emboss = true,
        x = 160,
        y = 422
}
 
local locationHandler = function( event )
        local latitudeText = string.format( '%.4f', event.latitude )
        currentLatitude = latitudeText
        latitude:setText( latitudeText )
        
        local longitudeText = string.format( '%.4f', event.longitude )
        currentLongitude = longitudeText
        longitude:setText( longitudeText )
        
        local altitudeText = string.format( '%.3f', event.altitude )
        altitude:setText( altitudeText )
 
        local accuracyText = string.format( '%.3f', event.accuracy )
        accuracy:setText( accuracyText )
        
        local speedText = string.format( '%.3f', event.speed )
        speed:setText( speedText )
 
        local directionText = string.format( '%.3f', event.direction )
        direction:setText( directionText )
 
        -- Note: event.time is a Unix-style timestamp, expressed in seconds since Jan. 1, 1970
        local timeText = string.format( '%.0f', event.time )
        time:setText( timeText )
end
 
-- Determine if running on Corona Simulator
--
local isSimulator = "simulator" == system.getInfo("environment")
 
-- Location Events is not supported on Simulator
--
if isSimulator then
        msg = display.newText( "Location events not supported on Simulator!", 0, 230, "Verdana-Bold", 13 )
        msg.x = display.contentWidth/2          -- center title
        msg:setTextColor( 255,255,255 )
end
 
-- Activate location listener
Runtime:addEventListener( "location", locationHandler )