C / C++ / MFC

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Re: OnEraseBkgnd question Paul M Watt2-Jun-02 21:07 Paul M Watt 2-Jun-02 21:07  I would say yes, except that you probably do not want to send a call to the base class since you are redrawing over the entire screen anyway. You may end up with a flicker if white, then your gray color that you define. Are there any problems that you are seeing? Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! Re: OnEraseBkgnd question Nish Nishant2-Jun-02 21:15 Nish Nishant 2-Jun-02 21:15  kilowatt wrote: I would say yes, except that you probably do not want to send a call to the base class since you are redrawing over the entire screen anyway. You may end up with a flicker if white, then your gray color that you define. Are there any problems that you are seeing? Thanks Kilo. I am not facing any probs. The reason I had to do this was that I assumed that the background of the view would be RGB(255,255,255) but it was not that So I thought what the heck and made the background and my image background my own slightly grayish color. Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him. Re: OnEraseBkgnd question Bernhard2-Jun-02 22:19 Bernhard 2-Jun-02 22:19  but please be warned.. it is not not not nice at all to set a window's background not in the color the user defined in his / hers settings.. e.g. i have got a slight grayish background for all windows (otherwise my eyes burnt after staring 8 hours++ at the monitor) <rant> and i hate all programmer and want to rip out their nuts *you can add any hate - fantasy you like, e.g. slipknot lyrics*, who override my settings with stupid settings (e.g. white).. like lotus notes does.. (at least the client i have to use) if you don't want to use windows settings use another platform... and if you are a smart programmer you would use a transparent bitmap, altough it could look totally crappy if the background could be too dark... but.. you are a smart programmer, aren't you? so you are paid to find a solution.. maybe it is not a too good idea to override windows settings.. not? bernhard "I'm from the South Bronx, and I don't care what you say: those cows look dangerous." U.S. Secretary of State Colin Powell at George Bush's ranch in Texas Re: OnEraseBkgnd question Nish Nishant2-Jun-02 22:25 Nish Nishant 2-Jun-02 22:25  Well in this case I am the single end-user. This is a test program where I am trying to decode an unknown image format. I like grays. I want a gray background since I am going to be running this program close to 600 times today and tomorrow before I manage to crack the image format Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him. Re: OnEraseBkgnd question Tomasz Sowinski3-Jun-02 1:09 Tomasz Sowinski 3-Jun-02 1:09  Should work. You can use CDC::FillSolidRect which could be marginally faster - it uses a trick with ::ExtTextOut and doesn't create brush. Tomasz Sowinski -- http://www.shooltz.com - It's for protection - Protection from what? Zee Germans? GDI+ - Debug Build AJ1232-Jun-02 20:49 AJ123 2-Jun-02 20:49  Hi, For some bizzare reason I can't run any of my GDI+ projects in Debug mode. Keep getting compile-errors when i try to dynamically instantiate a Bitmap object. Also the IDE doesn't list the members of GDI+ objects as I code. Anyone any clues? Cheers Richard Re: GDI+ - Debug Build Ed Gadziemski3-Jun-02 11:28 Ed Gadziemski 3-Jun-02 11:28  You don't mention what compile-errors you're getting. If you're getting Error C2660: 'new' : function does not take three parameters, then an MFC generated define, DEBUG_NEW, defines a "new" operator that takes three parameters. It only applies to debug builds. You can undefine DEBUG_NEW so that debug builds also work or use the scope resolution operator ( :: ) before new to use the default C++ version, like this: bitmap = ::new bitmap GDI + - Scan Line Order AJ1232-Jun-02 20:46 AJ123 2-Jun-02 20:46  Hi, I have been looking at the GDI+ BitmapData Class for direct pixel data access. In MSDN it mentions you can get "bottom up" bitmap as well as "top down", when do you get bottom-up, is this present in any particular standards? Cheers Rich Re: GDI + - Scan Line Order Paul M Watt2-Jun-02 21:04 Paul M Watt 2-Jun-02 21:04  I do not know if it is present in any standards, but in the regular GDI, when you get access to the bits through GetDIBits, you can specify whether you want a bottom up, or a top-down bitmap. So it is a common thing, it has been around since windows 3.0, maybe longer. I think it really depends on what you are doing to determine how you may want to scan your bitmap. Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! One more thing Paul M Watt2-Jun-02 21:06 Paul M Watt 2-Jun-02 21:06  Sometimes your bitmap is upside down, or you want to flip your bitmap vertically at runtime, this is an easy way to accomplish that with no extra code beside specifying the scanline order that you desire. Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! COM+ threading 2-Jun-02 20:40 2-Jun-02 20:40  I have a STA COM object which is the gate to a service that has 15 threads, each corresponding to a Logical connection against an MVS. When this COM object lives inside the COM+ I can see from the performance monitor that it utilizes up to 8 threads. So no matter how many clients hit the component it will utilize up to 8 threads. However, when the same component lives outside the COM+,regsvr32 kkkk.dll, it will utilize all 15 threads. 1. Is there such a limitation in COM+? 2. Why the same component operates perfectly outside COM+? 3. Is there a chance to increase the number of threads while the component lives inside COM+? Thx Spiros Prantalos Focus Mazdak2-Jun-02 19:34 Mazdak 2-Jun-02 19:34  Which win32 API should I use to find out which external window has focus? Thanks Mazy "The more I search, the more my need For you, The more I bless, the more I bleed For you."The Outlaw Torn-Metallica Re: Focus Paul M Watt2-Jun-02 19:46 Paul M Watt 2-Jun-02 19:46  GetFocus will return the handle to the window if that window belongs to the calling threads message queue. If a window in that thread does not have the focus, then the result will be NULL. If you want to find out the focus window that belongs to a different thread or even a different application, you can call GetForegroundWindow to get a handle to the window with which the user is currently working then associate your threads message queue with that window by calling AttachThreadInput. THen you will be able to successfully call GetFocus on that window and get the handle of the control with the focus. Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! Re: Focus Mazdak2-Jun-02 21:24 Mazdak 2-Jun-02 21:24  Thank for reply kilowatt. kilowatt wrote: , you can call GetForegroundWindow to get a handle to the window with which the user is currently working then associate your threads message queue with that window by calling AttachThreadInput. THen you will be able to successfully call GetFocus on that window and get the handle of the control with the focus. I can't understand one thing,when I use GetForegroundWindow to get the handle to the window that user is currently working then whats the need for GetFocus? Mazy "The more I search, the more my need For you, The more I bless, the more I bleed For you."The Outlaw Torn-Metallica Re: Focus Paul M Watt2-Jun-02 21:45 Paul M Watt 2-Jun-02 21:45  GetForegroundWindow will tell you which is the top-level window that the user is working in. If you wanted to find the actual control that had the keyboard focus you would need to do that other stuff that I described. I hope that helps. Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! Re: Focus Mazdak2-Jun-02 22:05 Mazdak 2-Jun-02 22:05  kilowatt wrote: I hope that helps. Yes,I got the point now.Thank you. Mazy "The more I search, the more my need For you, The more I bless, the more I bleed For you."The Outlaw Torn-Metallica Re: Focus Mazdak2-Jun-02 22:32 Mazdak 2-Jun-02 22:32  Hi again kilo Do you mean something like this? HWND hwnd; DWORD dword; hwnd = (HWND)GetForegroundWindow(); GetWindowThreadProcessId( hwnd , &dword); AttachThreadInput( dword , GetCurrentThreadId() ,true); hwnd = GetFocus(); Thanks Mazy "The more I search, the more my need For you, The more I bless, the more I bleed For you."The Outlaw Torn-Metallica Changing fonts of my controls at once but how? Atilla Selem2-Jun-02 19:23 Atilla Selem 2-Jun-02 19:23  i have a dialog based app and too many CMyRichEdit controls used in it. i wanted to change fonts of my CMyRichEdit objects in MyRichEdit.cpp but i could not succeed. Where should i start from? When i do it in my OnInitDialog in CMyDialog class i achieved to change fonts of my individual CMyRichEdit controls but i want to change all controls at once. Is there anyone who can help me? Thanks for ur help, Atilla Selem just listening to you... Re: Changing fonts of my controls at once but how? Ed Gadziemski3-Jun-02 11:32 Ed Gadziemski 3-Jun-02 11:32  It might help if you explain why you could not succeed in changing fonts in MyRichEdit.cpp. You would normally set the font in the CMyRichEdit class. Basic GDI question Nish Nishant2-Jun-02 19:10 Nish Nishant 2-Jun-02 19:10  How do I draw a pixel into a CView? What's the API call to draw a pixel? I guess I put all the code in the OnDraw of the CView derived class! Regards Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him. Re: Basic GDI question [found it] Nish Nishant2-Jun-02 19:15 Nish Nishant 2-Jun-02 19:15  CDC::SetPixel Thanks Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him. Re: Basic GDI question [found it] Paul M Watt2-Jun-02 19:42 Paul M Watt 2-Jun-02 19:42  How many SetPixel operations will you be performing? If you are doing a lot, you may want to consider creating a bitmap and accessing the bits directly becuase set pixel will slow your program down by orders of magnitude. Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! Re: Basic GDI question [found it] Nish Nishant2-Jun-02 19:56 Nish Nishant 2-Jun-02 19:56  kilowatt wrote: How many SetPixel operations will you be performing? If you are doing a lot, you may want to consider creating a bitmap and accessing the bits directly becuase set pixel will slow your program down by orders of magnitude. I am trying to decrypt an unknown image format! I wanted to try out different combinations and reproduce the image. We have a hard copy of the image and the image file [some kinda custom format from the mid 80s] Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him. Re: Basic GDI question [found it] Paul M Watt2-Jun-02 20:16 Paul M Watt 2-Jun-02 20:16  Sounds interesting? Are you doing that for fun, or have you tried to find the decoder and it is not available? Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! Re: Basic GDI question [found it] Nish Nishant2-Jun-02 20:23 Nish Nishant 2-Jun-02 20:23  kilowatt wrote: Are you doing that for fun, or have you tried to find the decoder and it is not available? Part fun, part serious. We have a client who's been using this image format for almost 20 years. The main program is in GWBASIC and they have this external program [written with assembler]. Partial sources available. Long assembler listings I understand that the first 32 bytes is some kinda header. The rest of it has a lot of 0xFFs in them. I am assuming the 0xFFs are the black spaces and am making guessed at what the other bytes mean. One problem is I don't know the width of the image in pixels!!! Nish Regards, Nish Native CPian. Born and brought up on CP. With the CP blood in him.

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