Is there any way to resize already loaded preview when widget is resize?

Question

Is there any way to resize already loaded previews when panel widget is resize? <br />Actually, I have already a lot of preview images loaded on my preview panel's widget. when my preview panel is resize, is there any way to resize already loaded preview images without creating new preview images. <br /><br />ErrorCode CMPSImageListDataView::CreatePreview( const IDFile& previewFile, uint32 width, uint32 height, uint8 backGrey ) <br />{ <br />InterfacePtr<IPMStream> fileStream( StreamUtil::CreateFileStreamRead(previewFile) ); <br />if(!fileStream ) return kFailure; <br /><br />InterfacePtr<IK2ServiceRegistry> serviceRegistry(gSession, UseDefaultIID()); <br />if(!serviceRegistry) return kFailure; <br /><br />int numHandlers = serviceRegistry->GetServiceProviderCount(kImportProviderService); <br />for (int i = 0; i < numHandlers; i++) { InterfacePtr<IK2ServiceProvider> provider( serviceRegistry->QueryNthServiceProvider(kImportProviderService, i)); <br />InterfacePtr<IImportProvider> importProvider(provider, IID_IIMPORTPROVIDER); <br /><br />if (importProvider && importProvider->CanImportThisStream(fileStream) == IImportProvider::kFullImport) <br />{ <br />InterfacePtr<IImportPreview> preview(importProvider, IID_IIMPORTPREVIEW); <br />if(preview) <br />{ <br />bool16 reallocateNeeded = kTrue; <br />if( (this->m_fCachedImHeight == height) && (this->m_fCachedImWidth == width)) <br />reallocateNeeded = kFalse; <br /><br />if(reallocateNeeded) <br />{ <br />this->DeleteBuffers(); <br />m_fpCurAGMImage = new AGMImageRecord; <br />memset (m_fpCurAGMImage, 0, sizeof(AGMImageRecord)); <br />m_fpCurAGMImage->bounds.xMin = 0; <br />m_fpCurAGMImage->bounds.yMin = 0; <br />m_fpCurAGMImage->bounds.xMax = width; <br />m_fpCurAGMImage->bounds.yMax = height; <br />m_fpCurAGMImage->byteWidth = 3*width; <br />m_fpCurAGMImage->colorSpace = kAGMCsRGB; <br />m_fpCurAGMImage->bitsPerPixel = 24; <br />m_fpCurAGMImage->decodeArray = 0; <br />m_fpCurAGMImage->colorTab.numColors = 0; <br />m_fpCurAGMImage->colorTab.theColors = nil; <br /><br />this->m_fDataBuffer = new uint8[((m_fpCurAGMImage->byteWidth) * height)]; <br />ASSERT(this->m_fDataBuffer); <br />m_fpCurAGMImage->baseAddr = static_cast<void *>(this->m_fDataBuffer); <br /><br />this->m_fCachedImHeight = height; <br />this->m_fCachedImWidth = width; <br />} <br /><br />::memset(m_fpCurAGMImage->baseAddr, backGrey, (m_fpCurAGMImage->byteWidth) * height); <br /><br />if (m_fpCurAGMImage->baseAddr) <br />{ <br />AcquireWaitCursor busyCursor; <br />preview->Create24bitRGBPreview( (uint8*)m_fpCurAGMImage->baseAddr, width, height, fileStream, kTrue ); <br />m_fCurImageSysFile = previewFile; <br /><br />return kSuccess; <br />} <br />} <br />} <br />fileStream->Seek(0,kSeekFromStart); <br />} <br />return kFailure; <br />}

Answer 1

Really Thanks!! T Schneider<br />How can I do that matrix?<br />Would you mind....?<br /><br />                    <br />PMReal imageWidth = ( m_fpCurAGMImage->bounds.xMax - m_fpCurAGMImage->bounds.xMin);<br />                    <br />PMReal imageHeight = ( m_fpCurAGMImage->bounds.yMax - m_fpCurAGMImage->bounds.yMin);<br />                    <br />PMReal xOffset = frame.GetHCenter() - imageWidth/2;<br />PMReal yOffset = frame.GetVCenter() - imageHeight/2;<br /><br />gPort->translate(xOffset, yOffset);<br />               <br />InterfacePtr<ITransform> iTransform(this, IID_ITRANSFORM);<br />PMMatrix theMatrix = iTransform->GetInnerToParentMatrix();<br /><br />.??????????????????????????????.<br /><br />ASSERT(m_fpCurAGMImage);<br />gPort->image(m_fpCurAGMImage, theMatrix, 0);