background color: acedSetCurrentColors() doesn't work for 3D visual styles

[tbrammer]

Hi all,

I'm using acedSetCurrentColors() to change AutoCADs background color like that:

DWORD rgb=RGB(255,255,255);
AcColorSettings colors;
acedGetCurrentColors(&colors);
colors.dwGfxModelBkColor	= rgb;
colors.dwParallelBkColor	= rgb;
colors.dwGfxLayoutBkColor	= rgb;
BOOL bStat = acedSetCurrentColors(&colors);

This works well for the paperspace background and for the visual style "2D wireframe" (dwGfxModelBkColor).

But it fails for 3D visual styles like "realistic", "hidden" and so on (dwParallelBkColor).

If I call acedSetCurrentColors()  before any 3D-viewport exists and than switch to "realistic" - than the "realistic" view will have "my" backgroundcolor.

But as soon as a 3D-viewport exists it just keeps its background-color.

If I look at the background color using the UI (preferences->Drawing->Colors->3D-parallel projection) the dialog shows "my" color! But it's not updated in the view.

Any ideas?

I want to create images with PNGOUT, JPGOUT or BMPOUT with a special background color (usually white).

Does anyone know a way to create PNG, JPG and BMP with "my" backgroundcolor just like the commands would do?

This would help me out as well.

I also tried:

Using COM - no success:

CWinApp *pApp = acedGetAcadWinApp();
IAcadApplication *pIAcad = (IAcadApplication*)pApp->GetIDispatch(TRUE);
IAcadPreferences *pIAcadPreferences=NULL;
pIAcad->get_Preferences(&pIAcadPreferences);

IAcadPreferencesDisplay *pIAcadPreferencesDisplay=NULL;
pIAcadPreferences->get_Display(&pIAcadPreferencesDisplay);

OLE_COLOR oleColorNew = RGB(255,255,255);
pIAcadPreferencesDisplay->put_GraphicsWinLayoutBackgrndColor(oleColorNew);
pIAcadPreferencesDisplay->put_GraphicsWinModelBackgrndColor(oleColorNew);

Using some AcGs* stuff:

void update3dViewports(DWORD rgb)
{
	AcAxDocLock myLock; 

	AcGsManager *pGsManager = acgsGetGsManager(NULL); //Manager for current MDI window
	AcGsModel *pGsModel = pGsManager->getDBModel();
	if (pGsModel)
		pGsModel->onPaletteModified();

	struct resbuf *pRs=NULL, *r=NULL;
	AcGsView *pView=NULL;
	int nCVPort=0;    
	bool bDevice=false;

	if (acedVports(&pRs) != RTNORM)
		return;

	for (r=pRs->rbnext; r; r=r->rbnext)
	{
		for (; r && r->restype!=RTSHORT; r=r->rbnext)
			;
		if (!r)
			break;

		nCVPort = r->resval.rint; 
		if (pView = acgsGetGsView(nCVPort, false))
		{			
			AcGsDevice *pDevice = pView->getDevice();
			if (pDevice)
			{
				AcGsColor color;
				color.m_red   = GetRValue(rgb);
				color.m_green = GetGValue(rgb);
				color.m_blue  = GetBValue(rgb);
				bDevice = pDevice->setBackgroundColor(color);
			}

			pView->invalidate();	// mark the AcGsView as invalid so that it knows it has to update			
			pView->update();		// update the view
		} 
	}
	acutRelRb(pRs);
}

Please help!

--Thomas

[moogalm · Accepted solution]

Hi ,

You need to call acedColorSettingsChanged to take changes effective , and sorry this is not an public API , I will request a wishlist with our Engineering to make this API public and provide neccessary documentation.

extern BOOL acedColorSettingsChanged(BOOL bUpdateView,

BOOL bUpdateParallelBg,

BOOL

bUpdatePerspectiveBg);

static void ASDkMyGroupBGColorTest(void)
{
    // Add your code for command asdkArxProject.Test here
    AcColorSettings pColorSettings; 
    acedGetCurrentColors(&pColorSettings); // Get the current colors
    pColorSettings.dwGfxModelBkColor=RGB(255,0,0);// Set the background to red
    pColorSettings.dwModelCrossHairColor=RGB(255,255,0);// set the cursor to yellow
	pColorSettings.dwParallelBkColor = RGB(255,0,0);// set the 3dParallel projection to red
    acedSetCurrentColors(&pColorSettings);
	acedColorSettingsChanged(false, true, true);  // apply the changes. //...
}

[tbrammer]

Yep. This is it. Thanks!