C / C++ / MFC

Re: how to launch a notepad with the supplied information

24-Jan-06 0:30

For non-user interaction:
cant you just save the string to a file with .txt extention? is it specific to the notepad application?

For user-interaction required:
You can also (maybe consider) use the clipbord to put the text data there and the user can then say paste to put the content whereever the user wants to paste.
This way you dont have to open a notepadd application all the time for each text that needs to be tranfered.

-Prakash

rampaul27-Jan-06 2:41

rampaul

27-Jan-06 2:41

hi,

thanks for ur reply,
the situation is there is a string that should be displayed, when i press a button in the dialog box, in the text file(notepad), later the user can save the text file wherever he wants,.

if you write the explanation in detail that would be nice,

thanks in advance,
paul

-- modified at 8:42 Friday 27th January, 2006

Drag and Drop

Anil_vvs23-Jan-06 23:38

Anil_vvs

23-Jan-06 23:38

Can someone tell me how to override the explorers implementation of Drop event for a specific case? More elaborately, I need to provide a custom implementation of the Drop event when a file is dragged from my namespace extension to a Windows folder.

Thanks and Regards,
Anil

Re: Drag and Drop

Prakash Nadar24-Jan-06 0:37

24-Jan-06 0:37

do you want to transfer a file from your namespace system to windows file system rite?

And your namespace system does not contain windows filesystem data?

-Prakash

Re: Drag and Drop

Anil_vvs24-Jan-06 0:44

Anil_vvs

24-Jan-06 0:44

Exactly!! What is supposed to happen is I will give the details of the file as well as the directory to which it is to be downloaded to an Applet and it will do what is necessary. Can you help me with this?

Thanks and Regards,
Anil

Re: Drag and Drop

Prakash Nadar24-Jan-06 1:00

about virtual function's return type

24-Jan-06 1:00

Humm, it is difficult to hook on to someone else implementation of the drag drop.

This is what i did,
1.I had a service running the background which simulated my application specific clipboard.
2.Implement ICopyHook[^], The service implements this hook
3. Specify a directory name which is very unique, like C:\program files\<guidno>

4. When you want to drag drop, put this unique directory name in the clipboard and send other files that needs to be copied to the service that is running the background.
5. When the files are droped, windows will try to copy the files, now we hook that copy operation at the directory level, check that this is the unique directory, so the src data belongs to us.
6. dismiss the copy operation so that windows does not do any copying stuff, now the service has the src files, and destination direcotry.
7. Start your custom copy operation.

Complecated Wink | ;)

But i could not find any other solution, but it worked very nicely.

Actually i did not test this for drag-drop, i have tested this for copy-paste task.

Hope this helps you in someway.

-Prakash

bobi_zcl23-Jan-06 23:37

bobi_zcl

23-Jan-06 23:37

Hi:this is my codes:
class CIPerson
{
int m_nID;
};

class CStudent:public CIPerson
{
int m_nOld;
};

class CIPersonInfo
{
virtual CIPerson & search()=0;
};

class CStudentInfo:public CIPersonInfo
{
CStudent & search(){}
};

can you tell me why "CStudent & search(){}" is error?CStudent is derived from CIPerson

your friend:bobi

toxcct23-Jan-06 23:47

toxcct

23-Jan-06 23:47

firstly, why do you create two new classes xxxInfo for the search methods ?
secondly, what is the error returned ?
thirdly, did you notice that your base classes data members were private (where they should be protected) ?

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

-- modified at 5:47 Tuesday 24th January, 2006

Aamir Butt24-Jan-06 0:05

Aamir Butt

24-Jan-06 0:05

You have an empty body of Search() method. You should return a CStudent object. toxcct has pointed other things which are equally valid as well.

Taka Muraoka24-Jan-06 4:23

Taka Muraoka

24-Jan-06 4:23

You can't override functions only by return type. Both search() methods need to return exactly the same type. It doesn't matter that one is derived from the other, they must be *exactly* the same.

The two most common elements in the universe are Hydrogen and stupidity. - Harlan Ellison

Awasu 2.2 [^]: A free RSS/Atom feed reader with support for Code Project.

sunit524-Jan-06 6:56

sunit5

24-Jan-06 6:56

signature of the virtual functions in base and derived
class must be same .but their returns types can be different only if both returns have base and derived relation ship

class CBase
{
virtual CBase* func1(int,char);
};

class CDerived
{
CDerived *func19int,char);
};

never say die

bobi_zcl24-Jan-06 13:33

bobi_zcl

24-Jan-06 13:33

yes,I think you have understand, I want to know it is right that virtual functions's returns types can be different only if both returns have base and derived relation ship,but follow codes is error in Visual C++ 6.0:

class CBase
{
virtual CBase* func1(int,char);
};

class CDerived:public CBase
{
CDerived *func1(int,char);
};

can you tell me why?

your friend:bobi

sunit525-Jan-06 6:25

sunit5

25-Jan-06 6:25

pls tell me the error

Also have define function func1 for base and for derived as well.

never say die

Report Generator control suggestion

bobi_zcl5-Feb-06 15:46

bobi_zcl

5-Feb-06 15:46

class CBase
{
virtual CBase* func1(int,char);
};

class CDerived:public CBase
{
CDerived *func1(int,char);
};
I complier codes in VC 6.0 and diplay follow error:
error C2555: 'CDerived::func1' : overriding virtual function differs from 'CBase::func1' only by return type or calling convention

because CDerived derived from CBase, I think CDerived::func1 can return CDerived's pointer.do you think so ?

your friend:bobi

ddmcr23-Jan-06 23:31

ddmcr

23-Jan-06 23:31

Hello guys,

Do you know any simple report generator control ?

I need it for printing out some data in Grid form.

I have already seen Johan Rosengrens Report Generator[^] and I am having some issues with it.

Any other recommendations would be appreciated

thanks.

"Success is the ability to go from one failure to another with no loss of enthusiasm." - W.Churchill

-- modified at 5:49 Tuesday 24th January, 2006

Static Text control's ToolTip On ComboBox item?

rajan.msmy23-Jan-06 22:53

rajan.msmy

23-Jan-06 22:53

Hi Buddies,
I'm working with MFC Application which contains combo boxes and static text controls. ToolTip is given to static text to expose full text due to space constraints. Below the ComboBox i have static text which pop-ups ToolTip when mouse hovered on it. When i get my ComboBox's drop-down window, it's overlapping on the static text control. If you move your mouse from one item to other item in the ComboBox then i'm getting static text's ToolTip blocking the ComboBox item names.

Is there any way to find out that one window(Static text)is overlapped by other(ComboBox) to fix this problem?

Thanks in advance,
Rajan

What do virtual inline function mean?

vikas amin23-Jan-06 22:51

vikas amin

23-Jan-06 22:51

If declare a virtual function as inline
what is the effect on the code.

Vikas Amin
Embin Technology
Bombay

toxcct23-Jan-06 22:56

toxcct

23-Jan-06 22:56

it will try to inline the function if it provides an implementation of the function that is actually called...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Taka Muraoka23-Jan-06 23:34

Taka Muraoka

23-Jan-06 23:34

Actually, it won't. "virtual inline" makes no sense and the inline specifier will be ignored.

Virtual functions let an object decide at runtime which particular implementation of a method should be invoked. If you have a pointer to the base object and call a virtual method, there is no way to know at compile time what type of object will be present at the actual time of the call. Hence, the compiler won't be able to figure out which implementation of the function to compile inline.

The two most common elements in the universe are Hydrogen and stupidity. - Harlan Ellison

Awasu 2.2 [^]: A free RSS/Atom feed reader with support for Code Project.

Prakash Nadar24-Jan-06 0:42

24-Jan-06 0:42

exactly!!

-Prakash

Decryption Routine needed.

Nemanja Trifunovic24-Jan-06 4:01

Nemanja Trifunovic

24-Jan-06 4:01

Taka Muraoka wrote:
Virtual functions let an object decide at runtime which particular implementation of a method should be invoked. If you have a pointer to the base object and call a virtual method, there is no way to know at compile time what type of object will be present at the actual time of the call. Hence, the compiler won't be able to figure out which implementation of the function to compile inline

This is of course, correct. However, if you use an object of the class in a non-polymorphic manner (say, create it on the stack), the compiler can figure out which object is used and inline the function.

Therefore, "virtual inline" actually makes sense, and will not be ignored Wink | ;)

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

Priya..k23-Jan-06 22:44

Priya..k

23-Jan-06 22:44

I need a decrytion routine to decrypt the password, since i can get the username but not the password. Confused | :confused:

void __fastcall TForm1::SQLConnectionBeforeConnect(TObject *Sender)

{

if (SQLConnection1->LoginPrompt == false)

{

SQLConnection1->Params->Values["User_Name"] = "SYSDBA";

SQLConnection1->Params->Values["Password"] =

Decrypt(SQLConnection1->Params->Values["Password"]);

}

}

Many Thanks,
Priya

Re: Decryption Routine needed.

Prakash Nadar24-Jan-06 0:43