Dissapearing buttons in Custom Render Dialog Tab Rollouts...

[Anonymous]

Hello,
I am making the Renderer plugin and got this strange problem with dissapering UI elements:

1. I removed unused Tabs like Render Elements and Advanced Lighting.
2. I added my Custom tab called ex. "My Renderer"
3. I added a rollout to the tab.
4. I added a button to the rollout.
5. After assigning my renderer, the "My Renderer" tab and rollout appears but there is no button.
The button apperas if I close an re-open rollout, but after a while it dissappears again.

What is the problem?

I'm giving some code below:

// RENDERER CLASS
class plug_05_Renderer : public Renderer, public ITabDialogObject
{
  public:
   plug_05_Renderer();
   ~plug_05_Renderer();

   virtual int Open(INode*, INode*, ViewParams*, RendParams&, HWND, DefaultLight*, int, RendProgressCallback*);
   virtual int Render(TimeValue, Bitmap*, FrameRendParams&, HWND, RendProgressCallback*, ViewParams*);
   virtual void Close(HWND, RendProgressCallback*);

   virtual ReferenceTarget* Clone(RemapDir&);
   virtual RendParamDlg* CreateParamDialog(IRendParams*, BOOL);
   virtual RefResult NotifyRefChanged(Interval, RefTargetHandle, PartID&,  RefMessage);
   virtual void ResetParams();
   
   BaseInterface* GetInterface ( Interface_ID );
   virtual void AddTabToDialog ( ITabbedDialog* , ITabDialogPluginTab* );
   virtual int AcceptTab ( ITabDialogPluginTab* );

   virtual Class_ID ClassID();
   virtual void  GetClassName( TSTR& );
};

plug_05_Renderer :: plug_05_Renderer() { }
plug_05_Renderer :: ~plug_05_Renderer() { }

int plug_05_Renderer :: Open (INode *scene, INode *vnode, ViewParams *viewPar, RendParams &rp, HWND hwnd, DefaultLight *defaultLights=NULL, int numDefLights=0, RendProgressCallback *prog=NULL)
{
 return 1;
}

int plug_05_Renderer :: Render (TimeValue t, Bitmap *tobm, FrameRendParams &frp, HWND hwnd, RendProgressCallback *prog=NULL, ViewParams *viewPar=NULL)
{
 int nExitStatus = 1;

 return nExitStatus;
}

void plug_05_Renderer :: Close (HWND hwnd, RendProgressCallback *prog=NULL)
{
}

ReferenceTarget* plug_05_Renderer :: Clone(RemapDir &remap)
{
    ReferenceTarget* result = new plug_05_Renderer();
    BaseClone(this, result, remap);
    return result;
}

RendParamDlg* plug_05_Renderer :: CreateParamDialog(IRendParams *ir, BOOL prog=FALSE)
{
 return new plug_05_RendParamDlg( ir, prog );
}

RefResult plug_05_Renderer :: NotifyRefChanged(Interval changeInt, RefTargetHandle hTarget, PartID& partID,  RefMessage message)
{
 return REF_DONTCARE;
}

void plug_05_Renderer :: ResetParams() { }

BaseInterface* plug_05_Renderer :: GetInterface ( Interface_ID id )
{
   if ( id == TAB_DIALOG_OBJECT_INTERFACE_ID ) 
   {
 ITabDialogObject* r = this;
 return r;
   }
   else 
   {
      return Renderer :: GetInterface ( id );
   }
}

void  plug_05_Renderer :: AddTabToDialog ( ITabbedDialog* dialog, ITabDialogPluginTab* tab )
{ 
 dialog->AddRollout( GetString( hDllInstance, IDS_TABNAME ), NULL, kTabClassID, tab, -1, 0, 0, 0, ITabbedDialog::kNormalPage, -1 );
}

int plug_05_Renderer :: AcceptTab ( ITabDialogPluginTab* tab )
{
 Class_ID blurRaytrace ( 0x4fa95e9b, 0x9a26e66 );
 
 switch ( tab->GetSuperClassID ( ) ) 
 {
 case RADIOSITY_CLASS_ID:
 return 0;         // Don't show the advanced lighting tab
 }

 Class_ID id = tab->GetClassID ( );
   
 if ( id == blurRaytrace )
 return 0;         // Don't show the blur raytracer tab

   // Accept all other tabs
   return TAB_DIALOG_ADD_TAB;
}

Class_ID plug_05_Renderer :: ClassID()
{
 return PLUG_05_CLASS_ID;
}

void plug_05_Renderer :: GetClassName(TSTR& s)
{
 s = GetString( hDllInstance, IDS_CLASSNAME ); 
}

// REND PARAM DIALOG CLASS

class plug_05_RendParamDlg : public RendParamDlg 
{
   public:
    IRendParams* ir;

    HWND hRoll_01, hRoll_02, hRoll_03;

    plug_05_RendParamDlg( IRendParams*, BOOL );
    ~plug_05_RendParamDlg();

    virtual void AcceptParams();
    virtual void RejectParams();
    virtual void DeleteThis();
};

plug_05_RendParamDlg :: plug_05_RendParamDlg( IRendParams *_ir, BOOL _prog )
{
 this->ir = _ir;

 if ( !_prog )
 {
 _ir->AddTabRollupPage( kTabClassID, hDllInstance, MAKEINTRESOURCE( IDD_ROLL_01 ), RendParamsDlg_Proc, GetString( hDllInstance, IDS_ROLL_01_NAME ), (LPARAM)this, 0, ROLLUP_CAT_STANDARD );
 
 }
}

Thanks for any advices...!

[Anonymous]

Ok, I have found the solution,
I left the INT_PTR CALLBACK RendParamsDlg_Proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
empty because I didn't make any controls yet and that was the error,
it should be implemented at least in the minimum:

static INT_PTR CALLBACK RendParamsDlg_Proc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
 switch ( msg )
 {
 case WM_INITDIALOG:
 break;
      
 case WM_DESTROY:
        break;

 case WM_COMMAND:
 break;

 case WM_LBUTTONDOWN:
 case WM_MOUSEMOVE:
 case WM_LBUTTONUP:
        break;

 default:
 return FALSE;
 }  

 return true;
}