LadspaEffectMeter Class Reference

Inheritance diagram for LadspaEffectMeter:

Collaboration diagram for LadspaEffectMeter:

Public Member Functions
	LadspaEffectMeter (wxWindow *parent, const float &val, float min, float max)
void	Disconnect ()
virtual	~LadspaEffectMeter ()

Private Member Functions
void	OnErase (wxEraseEvent &evt)
void	OnPaint (wxPaintEvent &evt)
void	OnIdle (wxIdleEvent &evt)
void	OnSize (wxSizeEvent &evt)

Private Attributes
bool	mConnected { true }
const float &	mVal
float	mMin
float	mMax
float	mLastValue

Detailed Description

Definition at line 48 of file LadspaEditor.cpp.

Constructor & Destructor Documentation

LadspaEffectMeter()

LadspaEffectMeter::LadspaEffectMeter	(	wxWindow *	parent,
		const float &	val,
		float	min,
		float	max
	)

Definition at line 84 of file LadspaEditor.cpp.

:  wxWindow{ parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
      wxSIMPLE_BORDER },
   mVal(val)
{
   mMin = min;
   mMax = max;
   mLastValue = -mVal;
   SetBackgroundColour(*wxWHITE);
   SetMinSize({ 20, 20 });
}

~LadspaEffectMeter()

LadspaEffectMeter::~LadspaEffectMeter ( )

virtual

Definition at line 96 of file LadspaEditor.cpp.

{
}

Member Function Documentation

Disconnect()

void LadspaEffectMeter::Disconnect ( )

inline

Definition at line 53 of file LadspaEditor.cpp.

   {
      // Stop using mVal, it might be dangling now
      mConnected = false;
   }

References mConnected.

OnErase()

void LadspaEffectMeter::OnErase ( wxEraseEvent &  evt )

private

Definition at line 109 of file LadspaEditor.cpp.

{
   // Just ignore it to prevent flashing
}

OnIdle()

void LadspaEffectMeter::OnIdle ( wxIdleEvent &  evt )

private

Definition at line 100 of file LadspaEditor.cpp.

{
   evt.Skip();
   if (!mConnected)
      return;
   if (mLastValue != mVal)
      Refresh(false);
}

References mConnected, mLastValue, and mVal.

OnPaint()

void LadspaEffectMeter::OnPaint ( wxPaintEvent &  evt )

private

Definition at line 114 of file LadspaEditor.cpp.

{
   if (!mConnected)
      return;
 
   wxPaintDC dc(this);
 
   // Cache some metrics
   wxRect r = GetClientRect();
   wxCoord x = r.GetLeft();
   wxCoord y = r.GetTop();
   wxCoord w = r.GetWidth();
   wxCoord h = r.GetHeight();
 
   // These use unscaled value, min, and max
   float val = mVal;
   if (val > mMax)
      val = mMax;
   if (val < mMin)
      val = mMin;
   val -= mMin;
 
   // Setup for erasing the background
   dc.SetPen(*wxTRANSPARENT_PEN);
   dc.SetBrush(wxColour(100, 100, 220));
   dc.Clear();
   dc.DrawRectangle(x, y, (w * (val / fabs(mMax - mMin))), h);
 
   mLastValue = mVal;
}

References mConnected, mLastValue, mMax, mMin, and mVal.

OnSize()

void LadspaEffectMeter::OnSize ( wxSizeEvent &  evt )

private

Definition at line 145 of file LadspaEditor.cpp.

{
   Refresh(false);
}

Member Data Documentation

mConnected

bool LadspaEffectMeter::mConnected { true }

private

Definition at line 68 of file LadspaEditor.cpp.

Referenced by Disconnect(), OnIdle(), and OnPaint().

mLastValue

float LadspaEffectMeter::mLastValue

private

Definition at line 72 of file LadspaEditor.cpp.

Referenced by OnIdle(), and OnPaint().

mMax

float LadspaEffectMeter::mMax

private

Definition at line 71 of file LadspaEditor.cpp.

Referenced by OnPaint().

mMin

float LadspaEffectMeter::mMin

private

Definition at line 70 of file LadspaEditor.cpp.

Referenced by OnPaint().

mVal

const float& LadspaEffectMeter::mVal

private

Definition at line 69 of file LadspaEditor.cpp.

Referenced by OnIdle(), and OnPaint().

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The documentation for this class was generated from the following file:

• LadspaEditor.cpp