C / C++ / MFC

30-Oct-04 13:00

Hi,
i need to get the imagenumber from a clistctrl on which i added a imagelist.
At the OnDoubleClick event i need to get the imagenumber from the selected item.
Is there any way to retrieve the number?
I want to compare like

if (imagenumber == CONST_BITMAP_FOLDER)
{
Send next command
}

thx!

Ravi Bhavnani30-Oct-04 15:39

30-Oct-04 15:39

See CListCtrl::GetItem() and LVITEM.

/ravi

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shibble30-Oct-04 23:16

30-Oct-04 23:16

I do this @ doubleclick event:

<br />
LVITEM lvi;<br />
int nimage;<br />
int nitem;<br />
nitem=m_ctlServerList.GetSelectionMark();<br />
m_ctlServerList.GetItem(&lvi);<br />
nimage=lvi.iImage;<br />

The Problem is lvi.iImage returns always 0.

Ravi Bhavnani31-Oct-04 6:02

31-Oct-04 6:02

Couple of comments:

You should intialize lvi to zero to ensure the code works correctly in release mode.
You need to do lvi.mask = LVIF_IMAGE; before calling GetItem().

Hope this helps!

/ravi

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shibble31-Oct-04 7:02

31-Oct-04 7:02

Yeah it works fine! thx!
I got a new problem. I Fill a list control with stuff which is todo, i call it todolist.
The size of the ctrl displays 3 items without scrolling (item count varies).
I want to scroll to the current proccess item.
I´ve tried alot but didnt get any good result.
Here´s a code snipped:

<br />
			m_nTodoItem=nitem;<br />
			//Scrolling<br />
			m_pCtlListTodo->GetItemRect(0,rect,LVIR_ICON);<br />
			size.cy=0;<br />
			//m_pCtlListTodo->Scroll(-5000);<br />
			size.cy=nitem * rect.Height();<br />
			//scrollpos=m_pCtlListTodo->GetScrollPos(SB_VERT);<br />
			//size.cy-=scrollpos;<br />
			m_pCtlListTodo->SetScrollPos(SB_VERT,0);<br />
			m_pCtlListTodo->Scroll(size);<br />
			//scrollpos=rect.Height();<br />
	<br />
			m_pCtlListTodo->Scroll(size);<br />
			//m_pCtlListTodo->SetScrollPos(SB_VERT,scrollpos);<br />
			m_pCtlListTodo->SetSelectionMark(nitem);<br />

Sometimes just the bars scroll without the content.
How to scroll dynamicly with considering user actions.
Thx alot for help and sorry for bad english.

Ravi Bhavnani31-Oct-04 7:06

31-Oct-04 7:06

shibble wrote:
I want to scroll to the current proccess item.

Assuming you know the index of the item, you can call CListCtrl::EnsureVisible().

/ravi

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shibble31-Oct-04 7:12

how to Pass arguments to main and returning values from a program...

31-Oct-04 7:12

Great,great,great!!!!!
3 Hours of testing with those cra** scrollbars, its just one function..
Thx alot!!!!!!!!!

Kiran Satish30-Oct-04 11:08

Kiran Satish

30-Oct-04 11:08

Hi,

I have never worked on passing arguments to a cpp file. I am trying to pass a file name as an argument to the program and then return an 2Darray of data. becos i want to call this exe from from an external program.

can anyone help me by giving a prototype syntax for accomplishin this task.

thanks in advance,

Suman

Re: how to Pass arguments to main and returning values from a program...

Ravi Bhavnani30-Oct-04 15:41

Doing a program compares bubble sort and multithread sort...

30-Oct-04 15:41

See this[^] article. Your app should probably write its output to a (user specified) file.

/ravi

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30-Oct-04 10:45

Anyway, my teacher wants us to have an array size of 1,000,000(1 million) and have a segment size of 10000. However, if i put my segment size at 300000 or greater, i get an error saying that the program has encountered an error and needs to close. I can do 100000 and 200000 but anything greater and I get that error.
The programs works fine on 100000 and 200000 it sorts the thread correctly in bubble and multithread sort.

EDIT: For some reason i cant put the code in php.

Here is the code:

#include <windows.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

const int ArraySize=300000;
const int SegmentSize=10000;
const int SleepInterval=10;

DWORD WINAPI SortFun(LPVOID);
void InitializeArray(void);
void Merge(void);
int FindMinKeys(int keys[]);
void DisplayArray(int begin, int end);
void SORT(void);

static int RunFlag = ArraySize/SegmentSize;
int Array[ArraySize];

clock_t start, finish;
double duration;

LPSECURITY_ATTRIBUTES lpthreadattributes = NULL;
DWORD stacksize = 0;
DWORD dwcreationflags;
DWORD ThreadId[ArraySize/SegmentSize];
HANDLE TargetThread[ArraySize/SegmentSize];

void main(void)
{
InitializeArray();

start = clock();
// SORT();
finish = clock();
printf("\n Array Size =%d \n Segment Size =%d \nSleep Interval =%d\n",
ArraySize, SegmentSize, SleepInterval);
printf("\n ***** elapsed time for Single_threaded Bubble sort ****");

duration = (double)(finish - start) / CLOCKS_PER_SEC; // elapsed time in clocks/second
printf("\n clock ticks = %10.3lf\n",(double)(finish-start)); // elapsed time, clock ticks
printf("\n seconds = %10.3lf\n", duration );

// char ch=getchar();
// DisplayArray(0,ArraySize-1);
// ch = getchar();

// Create threads to sort every 1000 th segment of the array
int j=0;
start = clock();
for (int i=0; i<ArraySize; i=i+SegmentSize)
{

TargetThread[j] =
CreateThread(
NULL,
0,
SortFun,
&i,
0,
&ThreadId[j]
);
// printf(" j= %d th thread created\n",j);
//char ch = getchar();

// give time to the newly created thread to work

Sleep(SleepInterval);

// create the next thread

j++;
}
// wait for all threads to complete their work

while (RunFlag > 0)
Sleep(SleepInterval);

// Merge the sorted arrays

Merge();
finish = clock();

printf(" The Entire Array Sorted\n");
printf("\n ***** elapsed time for Multi_threaded Bubble sort ****");
printf("\n ***** Segment Size ***** %d\n",SegmentSize);
duration = (double)(finish - start) / CLOCKS_PER_SEC; // elapsed time in clocks/second
printf("\n clock ticks = %10.3lf\n",(double)(finish-start)); // elapsed time, clock ticks
printf("\n seconds = %10.3lf\n", duration );

// ch=getchar();
// DisplayArray (0,ArraySize-1);

// ch = getchar();
}
void InitializeArray(void)
{
for (int i=0; i<ArraySize; i++)
Array[i] = (rand()*171+rand())%1000000U;
}
void SORT(void)
{
int exchange;
int low = 0;
int high = ArraySize;

// printf(" low = %d high = %d\n",low,high);
for (int k = low; k<high-1; k++)
{
exchange = 0;
for (int l = low; l<= low +high-(k+1); l++)
if (Array[l] > Array[l+1])
{
int t = Array[l];
Array[l] = Array[l+1];
Array[l+1] = t;
exchange = 1;
}
if (exchange == 0) break;

}
}
DWORD WINAPI SortFun(LPVOID N)
{

int exchange;
int low = *(int*)N;
int high = low + SegmentSize-1;

// sort that portion of the array
// printf(" low = %d high = %d\n",low,high);
for (int k = low; k<high-1; k++)
{
exchange = 0;
for (int l = low; l<= low +high-(k+1); l++)
if (Array[l] > Array[l+1])
{
int t = Array[l];
Array[l] = Array[l+1];
Array[l+1] = t;
exchange = 1;
}
if (exchange == 0) break;

}
RunFlag--;

// printf(" ****** Array Segment Sorted ******\n");
//DisplayArray(low,low+SegmentSize-1);

// printf(" i= %d th tread ended\n",low/SegmentSize);
// char ch = getchar();
CloseHandle((void *)&TargetThread[low/1000]);
return 0;
}
void Merge(void)
{
int t[ArraySize];
int p[ArraySize/SegmentSize];
int keys[ArraySize/SegmentSize];

// set the pointers to point to the begining of the sorted segments

for (int i=0; i<ArraySize/SegmentSize; i++)
{
p[i] = i*SegmentSize;
keys[i] = Array[p[i]];
}

// Merge the Array portions

int tposition = 0;;
int Done = 0;
int MinPosition;
while (! Done)
{
MinPosition = FindMinKeys(keys);

if (MinPosition != -1)
{
t[tposition] = Array[p[MinPosition]];
tposition++;
p[MinPosition]++;

if (p[MinPosition] % SegmentSize == 0)
{
// reached the end of one segment

keys[MinPosition] = 1000000U;
}
else
keys[MinPosition] = Array[p[MinPosition]];
}
else
Done =1;

}
for (int j=0; j<ArraySize; j++)
Array[j] = t[j];

}
int FindMinKeys(int keys[])
{

int position = 0;
for (int i = 1; i<ArraySize/SegmentSize; i++)
{
if (keys[i] < keys[position])
position = i;
}
if (keys[position] == 1000000U) return -1;
return position;
}
void DisplayArray(int begin, int end)
{
for (int j=begin; j<=end; j++)
{
printf("%6d Array[i] = %6d \n",j,Array[j]);
}
}

YABQ (Yet Another Beginner Question)

BeerFizz30-Oct-04 8:47

BeerFizz

30-Oct-04 8:47

I am writing my first test C++ .Net program. A simple DLL and a program to call it. The DLL opens up a dialog upon request and displays passed parameters. Both the DLL and the Calling programs are Projects in a Solution.

So far, everything works, expect for the DLL opening the model dialog. I suspect I am not copying the correct information over to the caller directory.

In the property pages of the DLL, I specify two copy statements one to copy the .lib to the caller apps “debug” folder and the other to copy the .dll. (I know I should create my own lib folders somewhere and copy all to those, but this is a test)

This allows the caller app to link and load the dll at execution time, but the does not display the dialog. What am I missing? I have tried copying the .ddl’s .res (compiled resource) to the caller apps ‘Debug” folder, but that didn’t work.

Should I be bringing something else over, or do I need to set an alternative runtime path?

Thanks for your help
Phil

event programming?

Setesh8230-Oct-04 7:15

Setesh82

30-Oct-04 7:15

I have just decided to write my first GUI system and I was wondering if any of you might know of some good reading material or tutorials for getting started with writing and event system

thanks

hair today gone tomorrow D'Oh! | :doh:

2 MFC Questions from a newbie. Help please.

Member 148206230-Oct-04 5:01

Member 1482062

30-Oct-04 5:01

Hello,
I started to learn Visual C++ a week ago. I used to code in BCB before, a bit on ASM & WinAPI.

At the moment, the main problem for me is creating a GUI. After BCB, creating GUI in VC++ programs seems very difficult and not effectively.

So I have a few questions to you.

1) When I use CFrameWnd object as a main form, and place my controls on it - it flashes when I resize the form.
People adviced me to use WS_CLIPSIBLINGS & WS_CLIPCHILDREN styles and it partially helped.

All controls except Static and Tab Control (CTabCtrl) stopped flashing. Static flashes a bit and Tab Control flashes much. It's like I have a very slow computer =) But it's not true of course.

I have created a small example for u. All u need is compile it and try to resize and u will see that Tab Control flashes hard.

Do you know how to fix it?

2) Another question is: How can I handle right mouse click.
For example I have a static control on my form and I want to show a messagebox when a user clicks right mouse button on it. How can I do this?

I hope you help me guys. Thank you very much for spending your time reading this. Please, help me.

Member 148206230-Oct-04 5:04

Member 1482062

30-Oct-04 5:04

Oh, I fogot...
You can download my test example (that shows flashing) here: http://MozgC.info/test.zip

Natural_Demon31-Oct-04 5:02

Natural_Demon

31-Oct-04 5:02

your are not using MFC.

file --> new --> project --> visual c++ project --> mfc --> mfc aplication.
choose aplication type ...
choose dialog

after creating a new project
go to recource explorer and click on dialog
and draw your control and they don't flikker or flash

i think u choose win32 project.

kind regards,

marco

Bad = knowing 2 much

31-Oct-04 10:50

I am not using MFC? =)
Have u seen my test example?

class CMyWnd : public CFrameWnd
{
public:
CMyWnd(char *Title);
~CMyWnd();
private:
CStatic *Label;
CButton *Button;
CStatusBar *StatusBar;
CEdit *Edit;
CTabCtrl *TabControl;

};

Aren't these MFC classes? =)

As for mfc application -> Dialog based - Of course it will not flash - Dialog can not be resized, and I said that it flashes on resizing...

Any other ideas?