Rotary Knob

[C0dyg0]

Hello friends, i'm a noob here at Indigo forum (as you may know), and this is my fist request for help.
I've played with AMS some time ago, made a few simple installers (one still working at my working place, as a software installer form our server).
Past this years, and back to AMS, i'm trying to make a multimedia player (which is almost finished, wiht the help of a lot of reading in this forum),
but my doubt is, how can i do a mouse control on a costume image(s) rotary knob (volume) for the player.
I've tryed an approach for the volume slider with the "Slider_Framework" from Worm, and BioHazard code to "Display Audio Volume (via Images)"
but not with the result i want.
So what i'm asking here is, if you can guide me on creating the rotary movement controled by the mouse.
I think that includes math, angles, mouse actions and positions, to drag the knob, but i don't know how.
Point me some directions please, i'll try to do my best.


Another question: Can this code be usefull?
(It's from Eclipse (Android)

================================================== ================================================== =

local gAActiveKnob = nil
local xData, yData, tanData
local this_control

--Based on the X and Y positions of the cursor, determines the closest index in the slider, and checks if the cursor is in range of the slider
function CalculateKnobPosition(mapargs)
local dk_data = {}
local mid_x, mid_y
local ctrl_x, ctrl_y
local calc_x,calc_y
local radians, degrees

local press_x = mapargs.context_event_data.x
local press_y = mapargs.context_event_data.y

this_control = mapargs.context_control
dk_data = gre.get_data(this_control..".grd_width",this_contr ol..".grd_height",this_control..".grd_x",this_cont rol..".grd_y",this_control..".angle")
mid_x = dk_data[this_control..".grd_width"] / 2
mid_y = dk_data[this_control..".grd_height"] / 2
ctrl_x = dk_data[this_control..".grd_x"]
ctrl_y = dk_data[this_control..".grd_y"]

calc_x = press_x - mid_x - ctrl_x
calc_y = press_y - mid_y - ctrl_y

radians = math.atan2(calc_y, calc_x)
degrees = math.deg(radians)

-- rotate quadrant to align control rotation degrees
if(degrees < 0)then
--on the top portion of the circle
degrees = 90 - math.abs(degrees)
if(degrees < 0)then
degrees = 360 - math.abs(degrees)
end
else
degrees = 90 + math.abs(degrees)
end

-- apply start and end stops
--[[if(degrees > 54 and degrees < 90)then
degrees = 54
elseif(degrees > 90 and degrees < 126)then
degrees = 126
end--]]

print("press_x:" ..press_x .." press_y:" ..press_y )
print("ctrl_x:" ..ctrl_x .." ctrl_y:" ..ctrl_y )
print("calc_x:" ..calc_x .." calc_y:" ..calc_y )
print("x:" ..press_x - mid_x.." y:" ..press_y - mid_y .. " deg:"..degrees)

local data = {}
data["controls_layer.degrees.text"] = string.format("%3.1fº",degrees)
data[this_control..".angle"] = degrees
gre.set_data(data)

end

--Checks if motion is on current slider if so, calculates slider position
function CBKnobMotion(mapargs)
if gAActiveKnob == nil then
return
end
local control_name = mapargs.context_control
if gAActiveKnob == control_name then
CalculateKnobPosition(mapargs)
else
gAActiveKnob = nil
end
end

function CBKnobPress(mapargs)
gAActiveKnob = mapargs.context_control
CalculateKnobPosition(mapargs)
end

--When the slider is released set the active slider to nil
function CBKnobRelease(mapargs)
gAActiveKnob = nil
end


================================================== =================================================

[C0dyg0]

[herrin]

for this you should use Audio Control Object

[BioHazard]

The issue of using a rotary-style volume control was raised & addressed some time back.
It's inherently problematic - read this thread: https://forums.indigorose.com/forum/...e-control-dial

[herrin]

The plugin was written by LucasTheDuck who's not been active here since 2013..................
But without the source-code to the plugin, a definitive cause is unknowable

Knob Proper Test