setting color of peak meter dynamically ?

[nofish]

Still taking my first steps in WDL-OL and enjoying it...

So, with the help of this this tutorial and the IPlugControls example I've managed to build a simple distortion / clipper plugin with an output knob and a peak meter. Looks like this currently:

https://i.imgur.com/U7SY5jU.jpg

Now next step I'd like to try is change the color of the peak meter dynamically at some predetermined value (when over the clipping threshold) to indicate that signal clipping is happening. I.e. peak > clipping threshold ? -> turn meter red

How would I go doing this ?

As from what I understand so far, the color of the peak meter is set in
...controls.h here:

class IPeakMeterVert : public IControl
{
public:
	(...)

	bool Draw(IGraphics* pGraphics) 
	{
	  pGraphics->FillIRect(&COLOR_WHITE, &mRECT); // change this color dynamically ?

	  IRECT filledBit = IRECT(mRECT.L, mRECT.T, mRECT.R, mRECT.B - (mValue * mRECT.H()));
	  pGraphics->FillIRect(&mColor, &filledBit);
	  return true;
	}
        (...)
};

And the meter is drawn when doing in the plugin constructor:

mMeterIdx_L = pGraphics->AttachControl(new IPeakMeterVert(this, IRECT(meterL_left, meterTop, meterL_right, meterBottom))); 
mMeterIdx_R = pGraphics->AttachControl(new IPeakMeterVert(this, IRECT(meterR_left, meterTop, meterR_right, meterBottom)));

[random_id]

You could do a bunch of things, but you probably want to start by making a new meter class that inherits the IPeakMeterVert class. Then you can override the Draw() method to have the color change dynamically based on mValue. Something like this (I haven't tested it).

bool Draw(IGraphics* pGraphics) 
{
IColor cMeter;
if (mValue < 0.7) cMeter = COLOR_GREEN;
else if (mValue < 0.9) cMeter = COLOR_YELLOW;
else cMeter = COLOR_RED;

pGraphics->FillIRect(&cMeter, &mRECT);
IRECT filledBit = IRECT(mRECT.L, mRECT.T, mRECT.R, mRECT.B - (mValue * mRECT.H()));

pGraphics->FillIRect(&mColor, &filledBit);
return true;
}

[nofish]

Sorry for the terribly late reply (got distracted with other things meanwhile), just wanted to say I got it working with the help of your code snippet so thanks a lot.

Still needs a lot optimization (still learning...) but it's there basically.