Re: How to call manged api from unmanaged code? - Managed C++/CLI Discussion Boards

shivareaj5-Oct-12 7:30

5-Oct-12 7:30

Hi, this is my first post.

Work flow is like this:
i open child dialog from a dialog( which is launched from a toolbar of a window) after editing i close the child dialog, after closing child dialog shadow is retained on window but not on the parent dialog. Later when i close the parent dialog the child dialog shadow disappears.
(issue exist only when i edit in child dialog)

Thanks a lot,
Shivaraj

Re: Child dialog shadow remains

Richard MacCutchan5-Oct-12 22:35

Richard MacCutchan

5-Oct-12 22:35

That's because your main window does not receive a WM_PAINT message until the main dialog terminates. Cascading dialogs in this way is not the best design pattern.

One of these days I'm going to think of a really clever signature.

Re: Child dialog shadow remains

shivareaj6-Oct-12 6:02

shivareaj

6-Oct-12 6:02

Hi, I tried to use GetAncestor() method to get main window handle & REPAINT with RedrawWindow() or UpdateWindow(). Neither of which is working.

Re: Child dialog shadow remains

Richard MacCutchan6-Oct-12 6:07

Richard MacCutchan

6-Oct-12 6:07

That's because, as I said before, your main window will not be able to action a WM_PAINT, or any other, message, until the dialog returns from DoModal(). You need to consider whether your design is the right way of doing things.

One of these days I'm going to think of a really clever signature.

Re: Child dialog shadow remains

shivareaj6-Oct-12 17:55

shivareaj

6-Oct-12 17:55

Thanks for reply, I have seen same design patterns(using child dialog)in the same application but there is no issue there. I compared the code, am not finding any difference in RePainting aspects.

here i have sample code..

Below used OnModifyview dialog is child dialog of a dialog.

void CSelectColumnViewDlg::OnModifyview()
{
int iIndex = m_ctrlColumnViewList.GetCurSel();
if (iIndex < 0)
return;
double dViewId = m_ctrlColumnViewList.GetItemDataDouble(iIndex);
if (dViewId == 0.0)
return;
CWaitCursor wait;
CComPtr<idispatch> pDispColumnView;
CComPtr<itrackingdatamanager> pManager;
pManager.CoCreateInstance(CLSID_TrackingDataManager);
if (pManager)
pManager->GetColumnView(dViewId, &pDispColumnView);
CComQIPtr<itrackingcolumnview> pColumnView(pDispColumnView);
if (pColumnView == NULL)
return;
CModifyColumnViewDlg dlg;
dlg.SetColumnView(pColumnView);
dlg.SetType(m_lSolution, m_lListType);
dlg.SetTrackGroupCd(m_dTrackGroupCd);
std::set<cstring>* pExistingNames = GetExistingNames(iIndex);
dlg.SetExistingNames(pExistingNames);

C++

if (dlg.DoModal() == IDOK)
{	//Issue exist only when i edit in child dialog & click above OK (child dialog OK)	

HWND hWndAncestor = ::GetAncestor(GetSafeHwnd(), GA_ROOT);

//hWndAncestor->Invalidate(); //not working
//InvalidateRect(hWndAncestor, NULL, TRUE); //not working
//::RedrawWindow(hWndAncestor,NULL,NULL,RDW_INVALIDATE); //not working
//::UpdateWindow(hWndAncestor); //not working


m_ctrlColumnViewList.DeleteString(iIndex);

CComBSTR bstrName;
pColumnView->get_Name(&bstrName);
int iIndex = m_ctrlColumnViewList.AddString(CString(bstrName));
m_ctrlColumnViewList.SetItemDataDouble(iIndex, dViewId);
m_ctrlColumnViewList.SetCurSel(iIndex);

//Invalidate(); //not working
//RedrawWindow();	//not working

}

if (pExistingNames)
delete pExistingNames;
Invalidate();
//OnPaint(); //not working
//RedrawWindow();// not working
}

modified 7-Oct-12 0:04am.

Re: Child dialog shadow remains

Richard MacCutchan6-Oct-12 21:30

Richard MacCutchan

6-Oct-12 21:30

I don't know what more I can say except to repeat my earlier comment: as long as you have a dialog open (called via DoModal()) the main window cannot respond to messages and thus will not repaint itself.

One of these days I'm going to think of a really clever signature.

How to call manged api from unmanaged code?

litu kumar4-Oct-12 3:25

litu kumar

4-Oct-12 3:25

Hi,
I have a C++ application & I know the assembly which contains the managed API. But i unable to access from my un-managed code.

Kindly help me using a simple program.

Please note only .net dll (assemblies)has been provided but not any .tlb file.

So we want, with out using .tlb file we need to invoke .net API.

Thanks

modified 4-Oct-12 10:05am.

Re: How to call manged api from unmanaged code?

Richard Andrew x645-Oct-12 9:30

Richard Andrew x64

5-Oct-12 9:30

This article tells how:

Calling Managed Code from Unmanaged Code and vice-versa[^]

The difficult we do right away...
...the impossible takes slightly longer.

Re: How to call manged api from unmanaged code?

litu kumar15-Oct-12 2:13

litu kumar

15-Oct-12 2:13

Hi Andrew,
Thanks for your suggestion(link) .

Actually i had gone through the same link before you sent. Its a good link but it seems a very lengthy way. That's why i ignored that time.

And i need to add code without disturbing my existing unmanaged & managed code as well.

Like creating '/clr' supported files.

Hence if you have any good suggestion as compared to this ,then kindly let us know.

Thanks

Re: How to call manged api from unmanaged code?

Richard Andrew x6415-Oct-12 6:46

Richard Andrew x64

15-Oct-12 6:46

litu kumar wrote:
Hence if you have any good suggestion as compared to this ,then kindly let us
know.

The way described in the article is the only way.

The difficult we do right away...
...the impossible takes slightly longer.

How to create CLI Interface to access .net API from C++ code?

litu kumar3-Oct-12 0:19

litu kumar

3-Oct-12 0:19

Hi,

I have created a win32 dll. And I know the appropriate .net assembly file which contains the required methods.
I want to access those methods from my DLL.

I came to know , it can possible through C++/CLI interface.
But i'm very new to C++/CLI . So kindly help me to create such interface in C++ which can access those methods using certain assembly/any way.

If have any any sample example (running),then please share me soon. I tried a lot in google , but till now i didn't get any helpful samples .

Thanks in advance Smile | :)

modified 4-Oct-12 9:14am.

operato precendance question

Amrit Agr1-Oct-12 22:04

Amrit Agr

1-Oct-12 22:04

Hi developers,

I am interested to so solve this chunk of code

void main()
{
int Var = 90;
if(Var += Var == ++Var == 89)
printf(" %d ",Var);
}

After executing the code i m getting the answer "91"

I am really surprised with the answer. Infact, I am not clear with operator precedence in this problem. Please give some help for it.

Thanks.
Amrit Agrawal, Mumbai

Re: operato precendance question

Richard MacCutchan2-Oct-12 2:58

Richard MacCutchan

2-Oct-12 2:58

The rules are that expressions such as this may lead to incorrect results. You need to split it into constituent parts.

One of these days I'm going to think of a really clever signature.

Re: operato precendance question

jschell2-Oct-12 8:51

jschell

2-Oct-12 8:51

Amrit Agr wrote:
Please give some help for it.

Rewrite it so it is more maintainable.

Re: operato precendance question

skrtbhtngr15-Nov-12 0:39

skrtbhtngr

15-Nov-12 0:39

C++

void main()
{
int Var = 90;
if(Var += (((Var == (++Var)) == 89)))
printf(" %d ",Var);
}

Operator precedence:
1. Increment operator (++)
2. Relational operator (==), and its Associativity is Left to Right
3. Assignment operator (+=)

Hope it helps... Thumbs Up | :thumbsup:

Large integer class please help

Msemler9328-Sep-12 1:29

Msemler93

28-Sep-12 1:29

Hi my professor gave my class this homework to do without giving us any notes or hints on how to do it. Im so lost and dont know where to start. I've put together some of the member function declarations and one constructor but highly doubt if they're correct.

An array can be used to store large integers one digit at a time. For example, the integer 1234 could bestoredinthearrayabysettinga[0]to1,a[1]to2,a[2]to3,anda[3]to4. However,for this project, you might find it more useful to store the digits backward, that is, place the least significant digit 4 in a[0], 3 in a[1], 2 in a[2], and the most significant digit 1 in a[3].

Design, implement, and test a class in which each object is a large integer with each digit stored in a separate element of a character array. You’ll also need a private member variable to keep track of the sign of the integer (perhaps a Boolean variable), and another private member variable to keep the size (or length) of the integer. The number of digits may grow as the program runs, so the class must use a character pointer (dynamic character array) as a member variable, which stores its value on the dynamic memory freestore (heap). You should also implement other appropriate operators for this class. More specifically, your class should provide default constructor, deep-copy copy constructor, overloaded constructor(s), destructor, deep-copy assignment operator, overloaded arithmetic operators, comparison operators, input and output operators. You should also have a nice driver code to test all implemented member functions and overloaded operators.

#include <iostream>
using namespace std;
class BigInteger
{
private:
    bool sign; //sign of number
    char * arr; //dynamic character array
    int size; //size of array

public:
    BigInteger(int size=0); // default constructor
    BigInteger( const char* arr); // constructor that takes an int as a parameter
    BigInteger( BigInteger& arr); // copy constructor
    ~BigInteger(); // destructor
    void swap(BigInteger&);
    void count( int );
    BigInteger& operator=(const BigInteger& arr);
    BigInteger& operator+(const BigInteger& arr);
    BigInteger& operator-(const BigInteger& arr);

    bool operator==(const BigInteger & arr) const;
    bool operator!=(const BigInteger & arr) const;
    bool operator<(const BigInteger & arr) const;
    bool operator>(const BigInteger & arr) const;
    bool operator>=(const BigInteger & arr) const;
    bool operator<=(const BigInteger & arr) const;

    friend ostream& operator<<(ostream & output, const BigInteger& arr);
    friend istream& operator>>(istream & input, const BigInteger& arr);
};

int main()
{

}

BigInteger::BigInteger(int size) : arr(){

    arr= new char[size+1];
    for(int i=0;i<size;i++)
    {
        arr[i]=' ';
    }
    arr[ size ] = '\0';

}

BigInteger::BigInteger(const char* arr){


}

any help with this program to even get it started would be very appreciated thank you, i'm not asking for just the answer i actually want to know what i'm doing in my class.

Re: Large integer class please help

Richard MacCutchan28-Sep-12 2:05

Richard MacCutchan

28-Sep-12 2:05

Msemler93 wrote:
i actually want to know what i'm doing in my class.

If you don't know then it's a sure bet that we don't.

If you have specific technical questions then people will try to answer them, but no one is going to do your assignment for you. If you really do not understand the assignment then go and talk to your professor, or find some books or online materials to help you.

One of these days I'm going to think of a really clever signature.

Re: Large integer class please help

jschell28-Sep-12 10:22

jschell

28-Sep-12 10:22

You don't need the null at the end

Your constructor looks ok except that you did not take into account that the first byte might be a sign character.

I am not sure why your teacher thinks it would be better to store it backwards.

I suggest you try to create the following method next.

bool operator==(const BigInteger & arr) const;

To code it THINK (don't code) about the following cases
- The number is exactly the same.
- One number is zero, the other isn't.
- One number have more digits than the other.
- AFTER you do the above then consider what happens if the 'sign' value is set to represent a negative value.

AFTER you think about the above then attempt to code the method.

Re: Large integer class please help

Msemler9329-Sep-12 9:52

Msemler93

29-Sep-12 9:52

ok me and my friend have been working on the program and are having trouble getting the arrays to pass to the functions and dont know where the issue is.

#include <iostream>
using namespace std;

class Integer{

public:
Integer();
Integer(Integer& a);
Integer operator +(const Integer &);
Integer operator -(const Integer &);
bool operator<(Integer)const;
void SetArr();
void print();
void addNumbers();
void subNumbers();

private:
bool sign;
int size;
int size2;
int size3;
char * arr1;
char * arr2;
char * arr3;

};

int main()
{
Integer sum,diff, in1,in2;
in1.SetArr();
/*in2.SetArr();

in1.addNumbers();
in1.print();
in1.subNumbers();
in1.print();*/

}
Integer::Integer()
{
size=0;
arr1=NULL;
}
Integer::Integer(Integer& a)
{
a.size=0;
a.arr1=NULL;
}
void Integer::SetArr()
{
cout<<"How many digits is the number?"<<endl;
cin="">>size;
int* arr1=new int[size];
cout<<"Enter the sequence of the "<<size<<" integers"<<endl;=""
="" for(int="" i="(size-1);i">=0;i--)
cin>>arr1[i];

cout<<endl;
for(int="" i="0;i<size;i++)
" cout<<arr1[i];

="" cout<<endl<<"how="" many="" digits="" is="" the="" second="" number?"<<endl;
="" cin="">>size2;
int* arr2=new int[size2];
cout<<"Enter the sequence of the "<<size2<<" integers"<<endl;=""
="" for(int="" i="(size2-1);i">=0;i--)
cin>>arr2[i];

cout<<endl;
for(int="" i="0;i<size2;i++)
" cout<<arr2[i];

="" if(size="">=size2)
size3=size+1;
else
size3=size2+1;

int* arr3=new int[size3];

int carry=0;
for(int i=0;i<size3;i++){
arr3[i]="48+(arr1[i]+arr2[i]-2*48+carry)%10;
" carry="(arr1[i]+arr2[i]-2*48+carry)/10;
" }

="" cout<<endl<<"addition:"<<endl;
="" for(int="" i="(size3-1);i">=0;i--)
cout<<arr3[i];

="" cout<<endl<<endl;

=""

="" for(int="" i="0;i<size3;i++){
" if(arr1[i]="">arr2[i])
arr3[i]=arr1[i]-arr2[i];
else{
arr1[i+1]=(arr1[i+1]-1);
arr1[i]=arr1[i]+10;
arr3[i]=arr1[i]-arr2[i];
}
}
cout<<endl;
for(int="" i="0;i<size3;i++)
" cout<<arr3[i];
="" cout<<endl<<"subtraction:"<<endl;
="">=0;i--)
cout<<arr3[i];

}
void integer::print()
{
="" for(int="" i="0;i<size;i++)
" cout<<arr1[i];
}

void="" integer::addnumbers()
{
="" int="" carry="0;
" arr3[i]="48+(arr1[i]+arr2[i]-2*48+carry)%10;
" }
}

void="" integer::subnumbers()
{
="" if(arr1[i]="">arr2[i])
arr3[i]=arr1[i]-arr2[i];
else{
arr1[i+1]=(arr1[i+1]-1);
arr1[i]=arr1[i]+10;
arr3[i]=arr1[i]-arr2[i];
}
}
}

Re: Large integer class please help

jschell30-Sep-12 8:12

jschell

30-Sep-12 8:12

Use code tags when you post code.

Focus on the class - not the input/output. For testing you can hard code some values right now.

HOW CAN I CREATE A TRAPEZUM WITH A CIRCLE INSIDE IT??(CODE)

williamjr19-Sep-12 22:09

williamjr

19-Sep-12 22:09

HOW CAN I CREATE A TRAPEZIUM WITH A CIRCLE INSIDE IT??(CODE)

Re: HOW CAN I CREATE A TRAPEZUM WITH A CIRCLE INSIDE IT??(CODE)

Wes Aday20-Sep-12 3:57

Wes Aday

20-Sep-12 3:57

Why are you screaming at the people when you are asking for help?

You might look at using a graphics library to draw graphics objects....

Why is common sense not common?
Never argue with an idiot. They will drag you down to their level where they are an expert.
Sometimes it takes a lot of work to be lazy
Please stand in front of my pistol, smile and wait for the flash - JSOP 2012

Re: HOW CAN I CREATE A TRAPEZUM WITH A CIRCLE INSIDE IT??(CODE)

Pete O'Hanlon20-Sep-12 4:40

Pete O'Hanlon

20-Sep-12 4:40

We assumed it would be through code. If you're just talking about drawing it on paper, then you've come to the wrong place.

For the trapezium, draw a polygon. For the circle, draw an ellipse. Use maths to work out where to position each.

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

Windows Shutdown notification in a MFC Dialog app

Sunil P V13-Sep-12 0:20

Sunil P V

13-Sep-12 0:20

Hi,

I need a notification mechanism for windows shutting down prefferably wthout polling.

Any ideas?
Thanks in advance.

Sunil

Re: Windows Shutdown notification in a MFC Dialog app

Richard MacCutchan13-Sep-12 0:27

Richard MacCutchan

13-Sep-12 0:27

WM_QUERYENDSESSION[^] may be the message you need to check.

One of these days I'm going to think of a really clever signature.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.