cdc attunity

see the missingSave the following code: BOOL CMYView::OnEraseBkgnd(CDC* pDC) { return CView::OnEraseBkgnd(pDC);} Is to call the onerasebkgnd function of the parent class. We can block this call and only directly return true.The following describes the steps for drawing the memory buffer. Cbitmap bit; bit. loadbitmapa (idb_bitmap1); bitmap bm; bit. getbitmap ( BM); CDC memdc; memdc. createcompatibledc

Ii. draw lines 1. Use the global functions of the SDK to implement the draw line function HDC;HDC =: getdc (m_hwnd ); Movetoex (HDC, m_ptorigin.x, m_ptorigin.y, null );Lineto (HDC, point. X, point. y ); : Releasedc (m_hwnd, HDC ); Note: A device description table DC must be obtained for drawing. After drawing, you must release the device description table resources. 2. Use the CDC class of MFC to implement the draw line function

set the background to null, redraw the imageWill 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 may say that flashing is because of painting.The speed of a graph is too slow or the graphic display is too complex. In fact, this is not true. The effect of the display speed on the flickering is not fundamental. For example, in ondraw (

(hwnddlg); // The member variable is mounted! M_dlgtest-> showwindow (sw_show ); // A "free" dialog box is displayed, which is the same as the main window. } 　　 Of course, do not forget destroywindow () when the dialog box is closed. It is all standard processing in the dialog box class. 74. Hide the window (when the child window has no focus) When the program starts, use setwindowpos in initdialog to set the form out of the screen.Then hide1. Set the timer in the oninitdialog () function: (wm

changed. It is worth noting that setdialogbkcolor must be called before domodal () is called, and this method will change the color of all the dialogs in the application and cannot target a specified 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 () Method 3: Overload onctlcolor (CDC * PDC, cwnd * pwnd, uint nctlcolor), that is, wm_ctlc

", "general" → "AdditionalLibrary directories "fill in" X: \ ImageMagick-6.8.5 \ visualmagick \ Lib "," input "→" additional dependencies "fill in" core_db_magick ++ _. lib ". "Debugging" → "working directory" fill in "X: \ ImageMagick-6.8.5 \ visualmagick \ bin ".4. Compile and run the program. You can see the generated file in the ".. \ visualmagick \ bin" directory.Red_pixel.pngFile. The following describes how to use magick ++ in MFC.1. Create an MFC single-document application named testmag

I usually use APIs, CDC, and encapsulated internal functions. It's easy to draw lines and circles... I recently learned about computer graphics and had to study the underlying algorithms internally... I will post a few codes here to share with you! (Only the OnDraw function of MFC is provided here) I. Three algorithms for draw lines: 1. DDA (numerical differentiation) method: Void CDDALineView: OnDraw (CDC

How to draw irregular forms using MFC This article describes how to draw irregular forms using MFC. Share it with you for your reference. The specific analysis is as follows: Implementation process: 1. Create a DLG-based MFC application named tryBGDlg, set the DLG attribute to Title Bar: False, and keep other settings unchanged. 2. Create two images, one of which is a black and white image based on the player's appearance. The white area is the area to be preserved and finally displayed on the d

environment is a memory block used for display. It is used to store images before copying the memory image to the actual display device. This is exactly why the screen is not flashed, the function prototype is as follows; Virtual bool createcompatibledc (CDC * PDC ); The PDC points to a device environment, which is often obtained by getdc () in MFC. If the PDC value is blank, the function creates a memory device environment compatible with the system

Author: Zhu Jincan Source: http://blog.csdn.net/clever101 It should be said that this is not a profound problem, but it is still a little bit rewarding after research. First, let's talk about why we need to get the exact draw range of the string to improve the drawing efficiency. For example, when we plot, we only modify the string of a certain area, in this case, updating the entire customer zone is definitely unreasonable. Therefore, it is a common practice to obtain a precise range for updat

;//Input textCString m_stringMessages[MAX_STRING];//Array Of message stringspublic:CMainWindow();protected:int GetNearestPos(CPoint point);void PositionCaret(CDC * pDC=NULL);void DrawInputText(CDC * pDC);void ShowMessage(LPCTSTR pszMessage,UINT nChar,UINT nRepCnt,UINT nFlags);void DrawMessageHeader(CDC * pDC);void DrawMessage(

At ordinary times, used to the API, CDC and encapsulated internal functions, about drawing lines, draw a circle these things are at your fingertips ... Recently learning computer graphics, have to go deep inside the bottom of the algorithm ... Put a few code here to share! (Only the MFC OnDraw function is given here) First, draw the line of three algorithms: 1. DDA (Numerical differential) method: void Cddalineview::ondraw (

This article mainly describes the background color of the dialog box and the settings for the color of the control (SetDialogBkColor () is no longer supported).Settings for the background color of the dialog box1. Overload the OnPaint () function, which is the wm_paint message, as shown in the following code:voidCtestdlg::onpaint () {if(Isiconic ()) {CPaintDC DC ( This);//device context for drawingSendMessage (wm_iconerasebkgnd, reinterpret_cast0); //Center The icon in the workspace rectangle

Of course, I would like to use GDI + to completely replace GDI, and then only need to go from GDI objects to GDI + objects. But there are a few projects, but also new technology features, but also want to quickly develop, and will not discard the old version of the existing features. No way, can only sewing, ka bang 碙 啌 ... One, CDC to graphics as long as this: Graphics g(pDC->GetSafeHdc());//只要能构造CDC句柄的M

A buddy. See Database log growing [LOG_REUSE_WAIT_DESC] as replicationOne day that buddy saw the database log skyrocket, using the sys.databases view to see [Log_reuse_wait_desc] as replication, but the database did not do replicationBut the database has to do CDC data extraction, and finally found that it is the CDC problem, resulting in shrinking the log failure, the