LV2Editor::UI Struct Reference

#include <LV2Editor.h>

Public Member Functions
void	Destroy ()
	~UI ()

Public Attributes
SuilInstancePtr	mSuilInstance
wxWindowPtr< NativeWindow >	mNativeWin {}
bool	mJustLeakMemory { false }

Detailed Description

Definition at line 135 of file LV2Editor.h.

Constructor & Destructor Documentation

~UI()

LV2Editor::UI::~UI ( )

inline

Definition at line 137 of file LV2Editor.h.

{ Destroy(); }

References Destroy().

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Member Function Documentation

Destroy()

void LV2Editor::UI::Destroy

(

)

Definition at line 52 of file LV2Editor.cpp.

{
#ifdef __WXMAC__
   // Issue 3222: x42-limiter does an unbalanced release somewhere, requiring
   // the host to add an extra reference.  But other plug-ins don't expect
   // that.
   // This is how we can accommodate them either way.
 
   const auto widget = (mNativeWin && mSuilInstance)
      ? static_cast<WXWidget>(suil_instance_get_widget(mSuilInstance.get()))
      : nullptr;
   if (widget) {
      if (!mJustLeakMemory) {
         // Bump reference count twice
         wxCFRetain(widget);
         wxCFRetain(widget);
      }
      else {
         // Compensates for either an unbalanced release, or (when closing the
         // project while the dialog is open) dangling pointers remaining after
         // the last release, by adding one release.  In the second case, it
         // leaks resources.
         // (We can't detect here, which of the two cases applies.)
         wxCFRetain(widget);
      }
 
      // Do destruction of mNativeWin, which points to widget, and the suil
      // instance in the scope of an autorelease pool
      {
         wxMacAutoreleasePool pool;
         mNativeWin = nullptr;
         mSuilInstance.reset();
         // Deferred releases are forced to happen here, not later up the stack
         // in the enclosing wxMacAutoreleasePool given by wxWidgets
      }
 
      // Two increases of the reference count means there can be one unbalanced
      // release and yet we can still query the use-count safely
      if (!mJustLeakMemory) {
         int count = CFGetRetainCount(widget);
         wxCFRelease(widget);
         if (count > 1)
            // Most plug-ins should come here, but x42-limiter will not!
            wxCFRelease(widget);
      }
   }
#else
   mNativeWin = nullptr;
#endif
}

References mJustLeakMemory, mNativeWin, and mSuilInstance.

Referenced by LV2Editor::Disconnect(), and ~UI().

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Member Data Documentation

mJustLeakMemory

bool LV2Editor::UI::mJustLeakMemory { false }

Definition at line 141 of file LV2Editor.h.

Referenced by Destroy().

mNativeWin

wxWindowPtr<NativeWindow> LV2Editor::UI::mNativeWin {}

Definition at line 139 of file LV2Editor.h.

Referenced by LV2Editor::BuildFancy(), Destroy(), LV2Editor::OnSize(), LV2Editor::SizeRequest(), and LV2Editor::ui_resize().

mSuilInstance

SuilInstancePtr LV2Editor::UI::mSuilInstance

Definition at line 138 of file LV2Editor.h.

Referenced by LV2Editor::BuildFancy(), Destroy(), LV2Editor::OnIdle(), and LV2Editor::UpdateUI().

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The documentation for this struct was generated from the following files:

• LV2Editor.h
• LV2Editor.cpp