Problem implementing the priority_queue - C / C++ / MFC Discussion Boards

Re: How to Detect Computer Name in VC++

ThatsAlok8-Jun-05 2:33

ThatsAlok

8-Jun-05 2:33

vcforums wrote:
how to determine the name of the Computer in VC++

[GetComputerName]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: How to Detect Computer Name in VC++

David Crow8-Jun-05 2:35

David Crow

8-Jun-05 2:35

Another way is gethostname().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

GetOpenFileName()

User 5838528-Jun-05 2:13

User 583852

8-Jun-05 2:13

I am having a problem with this function. It always returns FALSE and then CommDlgExtendedError() returns CDERR_INITIALIZATION.

MSDN says CDERR_INITIALIZATION is caused by low memory but I dont think this is the problem. I have rebooted my machine and other apps are able to display this dialog. Originally this code was in a ATL project for a MapPoint Add In. I have copyed it into a simple dialog based MFC app and still have the same problem.

can anyone help?

I have the following

OPENFILENAME ofn;
char szFile[512];

ZeroMemory(&ofn, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = NULL;
ofn.lpstrFile = szFile;
ofn.nMaxFile = 512;
ofn.lpstrFilter = "All\0*.*\0TT Route Log\0*.TRL\0";
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

BOOL b = GetOpenFileName(&ofn);

DWORD err = CommDlgExtendedError();

Re: GetOpenFileName()

David Crow8-Jun-05 2:49

David Crow

8-Jun-05 2:49

I did not find anything inherently wrong with your code snippet as it worked fine for me with no changes. A few things you *might* want to consider would be:

char szFile[512] = {'\0'};
ofn.nMaxFile      = sizeof(szFile);
ofn.lpstrFilter   = "All (*.*)\0*.*\0TT Route Log (*.TRL)\0*.TRL\0";

While they don't hurt anything, the statements that assign NULL and 0 to the other structure members are not necessary. ZeroMemory() has already handled that.

Also, check out MSDN article Q222003.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: GetOpenFileName()

Graham Bradshaw8-Jun-05 3:17

Graham Bradshaw

8-Jun-05 3:17

Haven't tried the actual code, but the one thing I notice is

ofn.lpstrFilter = "All\0*.*\0TT Route Log\0*.TRL\0";

lpstrFilter needs to de double NULL terminated, like

ofn.lpstrFilter = "All\0*.*\0TT Route Log\0*.TRL\0\0";

Re: GetOpenFileName()

User 5838528-Jun-05 3:28

User 583852

8-Jun-05 3:28

That fixed it. Thank you very much. Im suprised because that code was copied straight from MSDN

Re: GetOpenFileName()

David Crow8-Jun-05 4:54

David Crow

8-Jun-05 4:54

The is an implied \0 at the end of every string literal. So the string "All\0*.*\0TT Route Log\0*.TRL\0\0" actually end with three of them.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Problem implementing the priority_queue

r3dqu33n8-Jun-05 1:46

r3dqu33n

8-Jun-05 1:46

Hello:

I'm trying to do a proirity_queue like this:

 #include < queue ><br />
using namespace std;<br />
<br />
struct stman{<br />
   int age;<br />
   double Height;<br />
   char Name[255];<br />
}<br />
<br />
priority_queue <stman> myQueue;<br />
stman sMan;<br />
<br />
int main(){<br />
<br />
  myQueue.push(sMan);<br />
  <br />
}

The code here does nothing... Hmmm | :|

but it explains the trouble in what i am, i can't save these tipe of struct into the queue, and order the priority based in the age of any instance of the struct.

The question is... someone knows how solve it??? Roll eyes | :rolleyes:

Thank you in advance

Re: Problem implementing the priority_queue

John M. Drescher8-Jun-05 3:09

John M. Drescher

8-Jun-05 3:09

http://www.yrl.co.uk/phil/stl/stl.htmlx#Priority_Queue[^]

John

change control postion during runtime in win32

daydremer8-Jun-05 1:24

daydremer

8-Jun-05 1:24

I have a problem in changing the position of a checkbox control during runtime.

i created the checkbox control during runtime also.

i have tried using SendMessage

SendMessage(GetDlgItem(hwnd,IDD_PIN_BUTTON + (intPinChkCtr)), WM_MOVE, 0, MAKELPARAM( (WORD)rectDialog.left, (WORD)rectDialog.top++) );

during debug while watching the return of the GetWindowRect() it says that the controls top property has increased but it seems that the control has not moved its position in the dialog.

any suggestions?

thanks!

Re: change control postion during runtime in win32

toxcct8-Jun-05 1:28

toxcct

8-Jun-05 1:28

it is not very proper to combine such operations on the same line, especially when you do not / cannot know in which order it is executed...

in your :

SendMessage(GetDlgItem(hwnd,IDD_PIN_BUTTON + (intPinChkCtr)), WM_MOVE, 0, MAKELPARAM( (WORD)rectDialog.left, (WORD)rectDialog.top++) );

are you sure the rectDialog.top++ is executed before the GetDlgItem() funciton is executed ?

wouldn't it be better to write ++(rectDialog.top), or better extract it before the line, then pass the value ?

cheers,

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: change control postion during runtime in win32

Anonymous8-Jun-05 1:42

Anonymous

8-Jun-05 1:42

thanks for the suggestion.
i tried it but it seems that the incremented top position was not kept.
during debug the top value would change but if i would be going back to the break point
again the previous top value was retained.

GetWindowRect( GetDlgItem(hwnd,IDD_PIN_BUTTON + (intPinChkCtr)), &rectDialog ); //breakpoint here<br />
sizeDialog.cx = rectDialog.right - rectDialog.left;<br />
sizeDialog.cy = rectDialog.bottom - rectDialog.top;<br />
SendMessage(GetDlgItem(hwnd,IDD_PIN_BUTTON + (intPinChkCtr)), WM_MOVE, 0, MAKELPARAM( (WORD)rectDialog.left, (WORD)(++rectDialog.top)) );

it seems like the control was not keeping the changes from the SendMessage()

Re: change control postion during runtime in win32

toxcct8-Jun-05 1:47

toxcct

8-Jun-05 1:47

and what about SetWindosPos() instead of SendMessage() ?

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: change control postion during runtime in win32

ThatsAlok8-Jun-05 1:35

ThatsAlok

8-Jun-05 1:35

daydremer wrote:
I have a problem in changing the position of a checkbox control during runtime

What about [MoveWindow] and [SetWindowPos] Api! Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: change control postion during runtime in win32

toxcct8-Jun-05 1:41

toxcct

8-Jun-05 1:41

it seem that alok have some trouble...
do you also click with your nose ?
or did you just forget the [Modify] link ? Big Grin | :-D

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: change control postion during runtime in win32

ThatsAlok8-Jun-05 1:53

ThatsAlok

8-Jun-05 1:53

toxcct wrote:
do you also click with your nose ?

No Using Hand these days, After Cedric lost control! Smile | :)

toxcct wrote:
it seem that alok have some trouble...

DAMM 500 error doing this, i think my message is not posted , so i post it again Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: change control postion during runtime in win32

toxcct8-Jun-05 1:57

toxcct

8-Jun-05 1:57

and what about [Delete] link now ? Laugh | :laugh:

(toxcct, looking at his watch : "Oh no, it's time to 3... the school's gonna disconnect the servers for 3 hours && 1/2 ... like every days Cry | :((

how will i write my posts???)

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: change control postion during runtime in win32

ThatsAlok8-Jun-05 2:00

ThatsAlok

8-Jun-05 2:00

toxcct wrote:
and what about [Delete] link now ?

YES OFFICER, IT WILL BE DONE, OVER AND OUT!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Bob Stanneveld8-Jun-05 2:25

Bob Stanneveld

8-Jun-05 2:25

toxcct wrote:
(toxcct, looking at his watch : "Oh no, it's time to 3... the school's gonna disconnect the servers for 3 hours && 1/2 ... like every days how will i write my posts???)

Ah yes, Alok we have an advantage the next hours...

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: OT

ThatsAlok8-Jun-05 2:36

ThatsAlok

8-Jun-05 2:36

Bob Stanneveld wrote:
Ah yes, Alok we have an advantage the next hours...

Nope 3 and 1/2 hr (Oops 1/2 hr already passed Smile | :)

)

Any way Now you are alone as i am logging off tooo, have nice DAY Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: OT

Bob Stanneveld8-Jun-05 2:40

Bob Stanneveld

8-Jun-05 2:40

LOL. I have to wait a few hours before I finish work and go home...

Have a nice day too Cool | :cool:

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: OT

toxcct8-Jun-05 5:09

toxcct

8-Jun-05 5:09

well, have a nice evening Big Grin | :-D

i'm back, but not for a long time Wink | ;)

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: OT

Bob Stanneveld8-Jun-05 5:13

Bob Stanneveld

8-Jun-05 5:13

Well, I'm finished with my work Roll eyes | :rolleyes:

so I head home now.

See you tomorrow Wink | ;)

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: change control postion during runtime in win32

daydremer8-Jun-05 3:13

daydremer

8-Jun-05 3:13

MoveWindow worked for me although it took me a while to figure out how the command works.
thanks a lot!

unsigned chars to unsigned short

richiemac8-Jun-05 1:12

richiemac

8-Jun-05 1:12

Hi all,

I got two unsigned chars that I need to convert into a unsigned short whereby the two chars act as the upper and lower bytes of the short. How do I go about this. It seems in my head to be a simple matter but I just can't figure it out.

Thank you in advance
Rich

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