attunity cdc

the trigger and timestamp mode, the MD5 mode is passive for the whole table data, and the performance is poor. The MD5 method is less accurate when there are no primary keys or unique columns in the table and duplicate records are included.D. Log comparison: The data is judged by analyzing the log of the database itself. Oracle's change data Capture (cdc,changeddatacapture) technology is representative of this. The

MFC has a powerful function and has a complete drawing function. On the Windows platform, the application's Graphics Device interface (INTERFACE,GDI) is abstracted into device CONTEXT,DC. In Microsoft's base Class library MFC, the CDC class is the base class that defines the device context object, and all the drawing functions are defined in the CDC base class. When you need to output text or graphics, you

functions2.2 Called in this functionCsplitterwnd::createstatic (Create irregular frame window)2.3 Calling Csplitterwnd::createview to the client area of the irregular frameSets the view window.Two MFC drawings1 Drawing Device ClassDetermines where the graphic is drawn, equivalent to the drawing of the paper.1.1 CDC ClassThe top-level parent class of the drawing device class. Encapsulates a general drawing device, such as:Printers, monitors, and more.

-*-import osdef cdwalker (CDROM, cdcfile): Export = "" For root, dirs, files in Os.walk (CDROM): #print (root, dirs, files) export + = "\%s;%s;%s"% (root, dirs, files) #print (export) Open (Cdcfile , ' W '). Write (export) cdwalker (' e:\\ ', ' CD1.CDC ') cdwalker (' e:\\ ', ' CD2.CDC ')Little White got the first Python function and successfully ran it two times, recording the contents of the same disc to 2

------------------------------------------------------------------------------------------- This article turns from : http://blog.csdn.net/xuyongbeijing2008/article/details/8063801 ------------------------------------------------------------------------------------------- Cdc::setmapmode virtual int setmapmode (int nmapmode ); Function Description: This function sets the mapping method for the specified device environment, which defines the unit of me

Cmytestview::ondraw (cdc* pDC) {cmytestdoc* PDoc = GetDocument (); Assert_valid (PDOC); if (!pdoc) return; TODO: Add native data hereAdd the drawing code/*cbitmap bitmap; Bitmap. LOADBITMAPW (Idb_me); *///Paint/*pdc->bitblt (100,50,50,60,memdc,0,0,srccopy); * */*point pt; pt.x=200; pt.y=200; CImageList ImageList; Imagelist.create (50,60,ilc_color24| ilc_mask,1,0); Imagelist.add (bitmap,rgb (0,0,0)); Imagelist.draw (pdc,0,pt,ild_transparent);

transparency effect;SelectObject (MEMDC, Oldbitmap);DeleteDC (MEMDC);DeleteObject (bitmap);There is certainly a limit to the above approach, because not all parent windows can accept this special WM_PAINT message feature, but MSDN mentions that most controls have this feature, and you should be careful to read its document content.Third: If the above methods are not, then the most stupid way, the GDI function to brush the background of the child window, but you need to know the parent window ba

coordinate of the window is mapped to two pixels of the viewport.void Ctestview::ondraw (cdc* pDC) {Ctestdoc * PDoc = GetDocument ();CRect rect; Declaring a CRect class rectangle objectGetClientRect (rect); Use the member function of the CWnd class GetClientRect (LPRECT LPRECT) to get the client area sizePdc->setmapmode (Mm_anisotropic); Set mapping mode to Mm_anisotropicPdc->setwindowext (rect. Width (), Rect.　　Height ()); Setup windowPdc->setviewpo

1,CreateMFC AppwizardProject, selectOptional based on the document or dialog box. 2,Add two images, as shown in the following figure. The second image hollows out the middle part of the first image, that is, it deletes this part of the area to make the background transparent. 3,Add bitmap resources and import the two images above. 4,Create a base classCwndClassTransparentwnd,CodeAs follows: Header file: [CPP: Collapse] + Expand source View plain Copy Print ?

user interfacesWe usually need to set a beautiful image as the basemap of our dialog.Program for drawingCodeSome problems may occur frequently in onpaint ().For example, drag a window and move it on the dialog.The dialog changes to gray until the action stops.This is because the program calls onerasebkgnd () immediately every time it needs to be re-painted ()Onerasebkgnd () draws the dialog into gray.The program will call onpaint () only after the action is stopped. Then the basemap we want to

To achieve pick-up, you only need to select the objects in the entity set to pick up the collection. The mouse goes through the object set is a brilliant color, and the mouse selects the object is Select an object from the object, and then add it to the selection set. Therefore, a class is developed to operate on entity tokens and selection sets. Typedef struct // Index Related to object pointer{Csolid * m_picksolid;Int index; // The Index associated with the pointer } Pindex; Typ

situation, it takes much less time to calculate a rect than to redraw the content that does not need to be repainted.2. Prohibit the system from deleting your windowThe system will help you remove the window with the specified background color when you need to re-draw the window. However, the area to be re-painted may be very small. Or, it takes a lot of computing to start before you redraw these things. At this time, you can disable the system from dropping the original image. Until you have c

content, in this way, the background color and the display image appear alternately in a short period of time, making the display window appear flashing. If you set the background to null, the duplicate drawing will not flash. Of course, this will make the display of the window messy, because during the re-painting, there is no background color to clear the original drawing, and a new image is superimposed. Some people may say that the blinking is caused by the drawing speed being too slow or t

2. Related plotting 1. Use the SDK to obtain the DC handle:HDC;HDC =: getdc (m_hwnd); // get the DC handleMovetoex (HDC, m_ptorigin.x, m_ptorigin.y, null );Lineto (HDC, point. X, point. y );: Releasedc (m_hwnd, HDC); // release the DC 2. Use the CDC class pointer and CWIN class member function to obtain the DC.CDC * PDC = getdc ();PDC-> moveTo (m_ptorigin );PDC-> lineto (point );Releasedc (PDC ); 3. Use the cclientdc object. (The cclientdc class

;// Button statusBool m_bover; // when the cursor is over the button, the value is true, and vice versa.Bool m_btracking; // This value is true when the mouse is not releasedBool m_bselected; // If the button is pressed, the value is true.Bool m_bfocus; // when the button is the current focus, the value is true. // OperationsPublic: // Overrides// Classwizard generated virtual function overrides// {Afx_virtual (cxpbutton)Protected:Virtual void presubclasswindow ();//} Afx_virtual // Implementati

background to null, the duplicate drawing will not flash. Of course, this will make the display of the window messy, because there is no background color for the original graph during re-painting.And overlay the new image. Some people may say that the blinking is caused by the drawing speed being too slow or the display graphics being too complex. In fact, this is not true. The display speed of the drawing has no effect on the flashing speed.Is fundamental. For example, in ondraw (

///////////////////////////////////////////////////////////////////////////////#if !defined(AFX_TESTTVIEW_H__605D4332_7071_4CE3_9EFE_73D15BB50061__INCLUDED_)#define AFX_TESTTVIEW_H__605D4332_7071_4CE3_9EFE_73D15BB50061__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#include "MapX.h"#include "MainFrm.h"class CTestTView : public CView{protected: // create from serialization onlyCTestTView();DECLARE_DYNCREATE(CTestTView)// Attributespublic:CTestTDoc* GetDocument();// Operationspu

　　 // Use HDC plot/* HDC; HDC =: getdc (m_hwnd); movetoex (HDC, m_ptorigin.x, m_ptorigin.y, null); lineto (HDC, point. x, point. y);: releasedc (m_hwnd, HDC ); * /// all window-related operations are encapsulated in the cwnd class // all drawing-related operations are encapsulated in the CDC class // use the CDC drawing/* CDC * PDC = cwnd:: getdc (); // getdc of

Use Oracle Database 10 GInternal ETL infrastructure Http://www.oracle.com/technology/global/cn/obe/10gr2_db_single/bidw/etl2/etl2_otn.htm -- Some basic concepts and types of CDC are introduced in Change Data Capture (1. This article mainly demonstrates the basic steps of implementing the synchronization mode CDC through a practical example. -- Create table Create table SALES ( ID NUMBER, Product

dialog box.---- Method 2: Reload onPaint (), that is, the message wm_paint. The Code is as follows (the above example project prevails ): Void cexampledlgdlg: OnPaint (){If (isiconic ())...Else{Crect rect;Cpaintdc DC (this );Getclientrect (rect );DC. fillsolidrect (rect, RGB (0,255, 0 ));// Set it to a green background Cdialog: OnPaint ();} ---- Method 3: Reload onCtlcolor (CDC * PDC, cwnd * pwnd, uint nctlcolor), that is, wm_ctlcolor message. The sp