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Ummm... Override also OnOK and OnCancel to do-nothing functions and see what happens.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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You need to do what RobJones showed in handing your OnClose. Note in particular, do *NOT* call CDialog::OnClose if you don't want to close the dialog!
Also, you will probably have to override OnOK and OnCancel and do something simimlar there, if your dialog has OK and Cancel buttons.
Even a broken clock is right twice a day.
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When I include a manifest (XML) file to use the Common Controls version 6 in the Resource or the path, and I call ::MessageBox(NULL, TEXT("Hello"), TEXT("Hello"), MB_OK), the messagebox isn't shown (I only hear a sound), if I do not include the manifest everything works fine.
It goes even wrong when I do:
#include "resource.h"
#include <tchar.h>
#include <windows.h>
int __stdcall
_tWinMain (HINSTANCE hInstance, HINSTANCE, TCHAR * lpCmdLine, int mainFrameDisplayMode)
{
MessageBox(NULL, TEXT("Hello"), TEXT("Hello"), MB_OK);
}
Sjoerd van Leent
LPCTSTR Dutch = TEXT("Double Dutch  ");
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This is most weird! Try adding the flag MB_ICONINFORMATION as well as MB_OK (Just a guess) .
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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Tried it but it didn't work, it's even more weird, I looked at the sorce of MFC, and know I'm really totally confused, it's done the same way I do.
LPCTSTR Dutch = TEXT("Double Dutch ");
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Do I need to register a manifest file or something, I really don't know whats going wrong.
LPCTSTR Dutch = TEXT("Double Dutch ");
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Hi,
I have lots of pointers floating around in my application and it would be fun and also reduce the footprint of my app if I could save them temporarily to a file.
Need help.
Thanks
B.
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If you were to save the pointers, you would have a load of numbers on disk, and unless you didn't delete the memory they point to, they would be useless. If you didn't delete the memory, you'd just have the tedious job of making sure you did at some point and pulling them from the file. It sounds like a bad idea to me.
Christian
No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002
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Huh?
What do you mean ? that you have THAT many pointers that the memory is overflowing ? You want to save the pointers or the objects ?
I think you want to have "auto" serializing objects, that will unload part of them on disk, and load it back when the pointer is accessed again ? is that what you want ?
And you might save some memory, but the application would slow down!
Max.
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Generally you cannot save out pointers unless you were to create your own heap manager, and that is a task unto itself.
What I would suggest to get the same effect that you are shooting for, is create a serializing function to store your objects to disk. All of the objects and strings that are shared through pointers should be stored in a table with an index or a handle ID. Then when you want to associate a the original pointer to the parent object, store the ID or index in the file instead.
Then when you reload the file, you will have recreate the objects in the tables, but you can store the IDs or indices in the tables. And when you recreate the objects that use the pointers, you look up the pointers in the tables that you created.
Good Luck
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!
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The pointers really point to some house made objects which are generated from a serial flow of data and then "consumed" by the app.
The problem is that this app might be receiving data for a long time without consuming which, if not properly handled, might cause a memory blast.
The solution seems to be the serialization/deserialization of objects into/from temp files. It is better having a slow ill app than having a quick dead.
Thanks for the feedback.
Bunburry
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how come the data is not processed right when it's received ? don't answer, just thinking out loud...
If your application is not speed dependant, I'd store the incoming data on disk right away, and only keep in memory the "file names", and when the data need to be processed, load it back from disk.
The problem with that, is that if the amount of data "received" in the house objects is really small compared to the overhead of having it on file; you'll still have the same memory problem.
Bunburry wrote:
It is better having a slow ill app than having a quick dead.
Well, it's better to have a healty running app than and slow and ill one!
Max.
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Bunburry wrote:
The pointers really point to some house made objects which are generated from a serial flow of data and then "consumed" by the app.
I would use memory mapped files!
Store your data in a memory mapped file. That will allow you to access any part of the memory buffer as if it were a pointer (because it is loaded into memory), yet at the same time it is persisted to your harddrive. Therefore if you do not consume the data immediately it can be stored to disk.
The only issue here is that you will need to manage the memory in the file in such a way that will allow you to flag the ranges of memory that have and have not yet been consumed.
Bunburry wrote:
It is better having a slow ill app than having a quick dead.
Basically it is best to shoot for a healthy app. Once you get a basic design set forth that is healthy, you can always improve the speed later. The speed can come from eliminating processing that isnt necessary, or moving items to back ground threads and processes. Get your solution working first, then increase the speed later.
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!
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Besides all thoses problems, it's not possible to have a garbage-collector working with it.
LPCTSTR Dutch = TEXT("Double Dutch ");
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You wont need a garbage collector, you will simply need a small class to manage the stream pointers for each of the data pieces. I have used a memory mapped file in a number of projects for interprocess communication where I managed data streams in both directions.
In this particular instance, the data would be copied to the memory mapped file, and if the data should be stored to disk, the virtual memory pages will just need to be flushed to the disk and it is instantaneously saved.
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!
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Paul Watt wrote:
You wont need a garbage collector, you will simply need a small class to manage the stream pointers for each of the data pieces. I have used a memory mapped file in a number of projects for interprocess communication where I managed data streams in both directions.
I didn't make my point clear enough, I meant if you're using a Garbage Collector, the pointers move around, if you save the pointer to a file, you must explicitly lock the pointer, if not, the ponter is read but doesn't point to the right address.
Sjoerd van Leent
LPCTSTR Dutch = TEXT("Double Dutch ");
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hello @all,
i have a mdi program. in the mainframe you have for example:
File -> Close
i would like to hide 'Close' to the users until the correct password entered.
enter password:
View -> Password
the 'Close' should not be gray or something like that. the user should not see that there is something like the 'Close', until he enter the right password.
i hope you can help me.
(please, give me an example or explain it in detail)
thank you very much
MFC
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What you want to do is BAD UI!
If the user start your application and cannot close it until he enters a password, it's offensive ! user still can kill the application ...
But I will give you a hint:
Check for CMenu::DeleteMenu ...
Anyway, I suggest you review your application workflow.
Max.
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thanks for reply.
the 'Close' is only an example.....sorry.....you are right.
can you help me more?
mfc
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MFC is the Best wrote:
the 'Close' is only an example.....sorry.....you are right.
can you help me more?
In what way ? Design ? Code ?
I don't know exactly what you intend to do ? so this is highly speculative :
If your application needs a password, it should be asked at the beginning, in a modal dialog, upon return of that dialog, if the password is wrong, you have the choice to either continue ( and you need to be able to check whether the password is valid or exists to block most operations with the ON_UPDATE_COMMAND_UI messages for menus and other type of check ) or quit.
If you continue running the application, you need a menu item to allow the user to enter the password.
Max.
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Hello,
I need the definitions for the following constants:
SPDRP_DEVTYPE
SPDRP_ADDRESS
SPDRP_BUSNUMBER
SPDRP_BUSTYPEGUID
SPDRP_CAPABILITIES
SPDRP_CHARACTERISTICS
SPDRP_CLASS
SPDRP_CLASSGUID
SPDRP_COMPATIBLEIDS
SPDRP_CONFIGFLAGS
SPDRP_DEVICEDESC
etc... (all constants SPDRP_*)
Please, I know that these constants are defined in a SDK or DDK, I don't need this SDK/DDK! I just need the definitions of the constants which begin with SPDRP_.
I don't need the descriptions of the constants, but their definitions, like
#define SPDRP_DEVTYPE ...
Thanks in advance!
-Dominik
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#define SPDRP_DEVICEDESC (0x00000000) // DeviceDesc (R/W)
#define SPDRP_HARDWAREID (0x00000001) // HardwareID (R/W)
#define SPDRP_COMPATIBLEIDS (0x00000002) // CompatibleIDs (R/W)
#define SPDRP_UNUSED0 (0x00000003) // unused
#define SPDRP_SERVICE (0x00000004) // Service (R/W)
#define SPDRP_UNUSED1 (0x00000005) // unused
#define SPDRP_UNUSED2 (0x00000006) // unused
#define SPDRP_CLASS (0x00000007) // Class (R--tied to ClassGUID)
#define SPDRP_CLASSGUID (0x00000008) // ClassGUID (R/W)
#define SPDRP_DRIVER (0x00000009) // Driver (R/W)
#define SPDRP_CONFIGFLAGS (0x0000000A) // ConfigFlags (R/W)
#define SPDRP_MFG (0x0000000B) // Mfg (R/W)
#define SPDRP_FRIENDLYNAME (0x0000000C) // FriendlyName (R/W)
#define SPDRP_LOCATION_INFORMATION (0x0000000D) // LocationInformation (R/W)
#define SPDRP_PHYSICAL_DEVICE_OBJECT_NAME (0x0000000E) // PhysicalDeviceObjectName (R)
#define SPDRP_CAPABILITIES (0x0000000F) // Capabilities (R)
#define SPDRP_UI_NUMBER (0x00000010) // UiNumber (R)
#define SPDRP_UPPERFILTERS (0x00000011) // UpperFilters (R/W)
#define SPDRP_LOWERFILTERS (0x00000012) // LowerFilters (R/W)
#define SPDRP_BUSTYPEGUID (0x00000013) // BusTypeGUID (R)
#define SPDRP_LEGACYBUSTYPE (0x00000014) // LegacyBusType (R)
#define SPDRP_BUSNUMBER (0x00000015) // BusNumber (R)
#define SPDRP_ENUMERATOR_NAME (0x00000016) // Enumerator Name (R)
#define SPDRP_SECURITY (0x00000017) // Security (R/W, binary form)
#define SPDRP_SECURITY_SDS (0x00000018) // Security (W, SDS form)
#define SPDRP_DEVTYPE (0x00000019) // Device Type (R/W)
#define SPDRP_EXCLUSIVE (0x0000001A) // Device is exclusive-access (R/W)
#define SPDRP_CHARACTERISTICS (0x0000001B) // Device Characteristics (R/W)
#define SPDRP_ADDRESS (0x0000001C) // Device Address (R)
#define SPDRP_UI_NUMBER_DESC_FORMAT (0X0000001D) // UiNumberDescFormat (R/W)
#define SPDRP_DEVICE_POWER_DATA (0x0000001E) // Device Power Data (R)
#define SPDRP_REMOVAL_POLICY (0x0000001F) // Removal Policy (R)
#define SPDRP_REMOVAL_POLICY_HW_DEFAULT (0x00000020) // Hardware Removal Policy (R)
#define SPDRP_REMOVAL_POLICY_OVERRIDE (0x00000021) // Removal Policy Override (RW)
#define SPDRP_INSTALL_STATE (0x00000022) // Device Install State (R)
#define SPDRP_LOCATION_PATHS (0x00000023) // Device Location Paths (R)
#define SPDRP_MAXIMUM_PROPERTY (0x00000024) // Upper bound on ordinals
#define SPCRP_SECURITY (0x00000017) // Security (R/W, binary form)
#define SPCRP_SECURITY_SDS (0x00000018) // Security (W, SDS form)
#define SPCRP_DEVTYPE (0x00000019) // Device Type (R/W)
#define SPCRP_EXCLUSIVE (0x0000001A) // Device is exclusive-access (R/W)
#define SPCRP_CHARACTERISTICS (0x0000001B) // Device Characteristics (R/W)
#define SPCRP_MAXIMUM_PROPERTY (0x0000001C) // Upper bound on ordinals
hope this helps
Gruß
modified 12-Sep-18 21:01pm.
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Hi !!
I want to convert text file into image file (jpg or tiff or gif) and save it. Can anyone tell me how ???
Thanks in advance.
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You need to draw it yourself. Create a bitmap, and then draw the text on it. If you want to save in something other than bmp you need something like CXImage, GDI+ or Paintlib. I have lots of GDI+ articles on CP, and CXImage also lives here.
Christian
No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002
Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002
Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002
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