C / C++ / MFC Discussion Boards

Re: Finding Windows installation directory

Vipin Aravind28-Jan-06 18:56

Vipin Aravind

28-Jan-06 18:56

GetSystemWindowsDirectory

Vipin - MVP

Re: Finding Windows installation directory

Eytukan29-Jan-06 2:50

Eytukan

29-Jan-06 2:50

just a clarification.
"The GetSystemWindowsDirectory function retrieves the path of the shared Windows directory on a multi-user system."-msdn.

so does this suit the question? Unsure | :~

VuNic

Again CListBox

hanno2528-Jan-06 6:15

hanno25

28-Jan-06 6:15

Another question:
Before calling the dialog, I try to call another function, which has access to the list elements. This function should fill the CListBox. But every time, I will add this elements to the CListBox (using AddString("text")), the program returns a error message. Whats the mistake?

Help!

Re: Again CListBox

PJ Arends28-Jan-06 9:55

PJ Arends

28-Jan-06 9:55

hanno25 wrote:
the program returns a error message

What message? The message that you get is telling you what is wrong. If you want help you have to let us know what the message is or else all we can do is take a guess.

My guess is that the CListBox window is not yet created when you call AddString() so there is no HWND to handle the LB_ADDSTRING message, resulting in an ASSERTion being thrown in CListBox::AddString().

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Re: Again CListBox

Eytukan28-Jan-06 17:17

Eytukan

28-Jan-06 17:17

you cannot access your dialog Items before initializing your dialog.

BOOL CMFCDlg::OnInitDialog()
{
}

VuNic

Re: Again CListBox

Laxman929-Jan-06 17:43

Laxman9

29-Jan-06 17:43

you may add ur code into initdialog function that insert the elements into the list box

BOOL CTestDlg::OnInitDialog()
{
CDialog::OnInitDialog();
//my code for adding the data into listbox
}

Thanks and Regards
Laxman

FAILURE is the first step towards SUCCESS Cool | :cool:

memcpy

Anthony988728-Jan-06 6:06

Anthony9887

28-Jan-06 6:06

Hi,

I would like to know if there is a way to copy partial memory contents(variables) from one structure to another using the memcpy function.

ie

struct TEMP{
int x;
int y;
int z;
};

I would like to copy the struct TEMP except the variable int z, to another struct TEMP?

Thanks

Re: memcpy

C^hris L^osinger28-Jan-06 6:12

C^hris L^osinger

28-Jan-06 6:12

you could do : memcpy(&destStruct, &sourceStruct, sizeof(int) * 2);

but that's only good if the stuff you want to skip is on the end of the struct.

Cleek | Image Toolkits | Thumbnail maker

Re: memcpy

Roland Pibinger28-Jan-06 7:54

Roland Pibinger

28-Jan-06 7:54

Chris Losinger wrote:
you could do : memcpy(&destStruct, &sourceStruct, sizeof(int) * 2);
but that's only good if the stuff you want to skip is on the end of the struct.

It probably works but the code is not safe and portable. The only guarantee is that the first data member and the struct have the same address (no virtual functions involved).

-- modified at 5:18 Sunday 29th January, 2006

A portable solution is:

memcpy(&destStruct, &sourceStruct, offsetof (TEMP, y) + sizeof(int));

Loading list elements in a CListBox

hanno2528-Jan-06 5:37

hanno25

28-Jan-06 5:37

Hi!

I try to fill a CListBox with elements of a CList object. The elements should be listed, as soon as the dialog will be opened. So, I have to do this via "OnInitDialog". But to get access to the list elements, OnINitDialog needs one parameter in his parameterlist.
Does somebody know, how I can overwrite this function?

Thanks a lot, hanno Smile | :)

Re: Loading list elements in a CListBox

Owner drawn29-Jan-06 18:04

Owner drawn

29-Jan-06 18:04

If you overload OnInitDialog it won't be called. OnInitDialog must have the exact signature then only it's going to be called. You can do this write a new function called Init(...) with your parameter and call this function from OnInitDialog.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
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--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

What's wrong with my map engine?

Lord Kixdemp28-Jan-06 4:35

Lord Kixdemp

28-Jan-06 4:35

Hello everyone! Big Grin | :-D

OK, I posted a question 1 or 2 days ago about this... I already solved that problem, but now I'm facing another one!

The problem is that the maps don't load up correctly... Here's the ObjectType enumeration:

enum ObjectType<br />
{<br />
	// Empty tile<br />
	LX_EMPTY,<br />
<br />
	// Tiles for first layer<br />
	//L1_DESERT,	// Commented out because it's the default value (LX_EMPTY)s<br />
	L1_GRASS,<br />
<br />
	// Tiles for second layer<br />
	L2_ROCK,<br />
<br />
	// Tiles for third layer<br />
	L3_TELEPORTER,<br />
};

Here's some previous declarations needed to understand the troublesome methods:

<br />
#define WIDTH	512<br />
<br />
#define HEIGHT	384<br />
<br />
#define CHARW	32<br />
<br />
#define CHARH	32<br />
<br />
SDL_Surface ** mapLayerTiles;<br />
<br />
ObjectType mapLayers[3][WIDTH*HEIGHT];<br />
<br />
SDL_Surface * screen;<br />

Here's the method that loads the map layers:

void Mazzee::GetMapInfo(std::string map)<br />
{<br />
	// Map file streams<br />
	FILE * f[3] = {<br />
		fopen((map + ".ml1").c_str(), "rt"), <br />
		fopen((map + ".ml2").c_str(), "rt"), <br />
		fopen((map + ".ml3").c_str(), "rt")<br />
	};<br />
<br />
	//FILE * outputz = fopen("outputz.txt", "wt");<br />
<br />
	for (int x = 0; x < 3; x++)<br />
	{<br />
		if (f[x] == NULL)<br />
			exit(1);<br />
	}<br />
<br />
	// Get data for the layers<br />
<br />
	for (int x = 0; x < 3; x++)<br />
	{<br />
		int p = 0;<br />
		while (p < (WIDTH/32)*(HEIGHT/32))<br />
		{<br />
			//p = 0;	// Commented for debug purposes<br />
<br />
			// Exit if EOF was found<br />
			if (feof(f[x]))<br />
				return;<br />
<br />
			char v = fgetc(f[x]);<br />
<br />
			//fputc(v, outputz);<br />
<br />
			switch (v)<br />
			{<br />
				// Layer X (all)<br />
			case '.':<br />
				this->mapLayers[x][p] = LX_EMPTY;<br />
				++p;<br />
				break;<br />
<br />
				// Layer 1<br />
			case '|':<br />
				this->mapLayers[x][p] = L1_GRASS;<br />
				++p;<br />
				break;<br />
<br />
				// Layer 2<br />
			case 'o':<br />
				this->mapLayers[x][p] = L2_ROCK;<br />
				++p;<br />
				break;<br />
			<br />
				// Layer 3<br />
			case 'T':<br />
				this->mapLayers[x][p] = L3_TELEPORTER;<br />
				++p;<br />
				break;<br />
<br />
				/*// Newlines: Less p var by one<br />
			case '\r':<br />
			case '\n':<br />
				--p;<br />
				break;*/<br />
			}<br />
		}<br />
<br />
		//fclose(outputz);<br />
<br />
		// Close stream<br />
		fclose(f[x]);<br />
	}<br />
}

And here's the method that displays the map on the screen:

void Mazzee::DrawMap()<br />
{<br />
	// Fill with tiles<br />
	for (int x = 0; x < (WIDTH); x += CHARW)<br />
	{<br />
		for (int y = 0; y < (HEIGHT); y += CHARH)<br />
		{<br />
			for (int v = 0; v < 3; v++)<br />
			{<br />
				SDL_Rect src, dest;<br />
<br />
				if (v == 0)<br />
				{<br />
					if (this->mapLayers[v][(x/32)*(y/32)] == LX_EMPTY) src.x = 0;<br />
					else if (this->mapLayers[v][(x/32)*(y/32)] == L1_GRASS) src.x = 32;<br />
				}<br />
				else if (v == 1)<br />
				{<br />
					if (this->mapLayers[v][(x/32)*(y/32)] == LX_EMPTY) src.x = 0;<br />
					else if (this->mapLayers[v][(x/32)*(y/32)] == L2_ROCK) src.x = 32;<br />
				}<br />
				else if (v == 2)<br />
				{<br />
					if (this->mapLayers[v][(x/32)*(y/32)] == LX_EMPTY) src.x = 0;<br />
					else if (this->mapLayers[v][(x/32)*(y/32)] == L3_TELEPORTER) src.x = 32;<br />
				}<br />
<br />
				src.y = 0;<br />
				src.h = CHARH;<br />
				src.w = CHARW;<br />
<br />
				dest.x = x;<br />
				dest.y = y;<br />
				dest.h = CHARH;<br />
				dest.w = CHARW;<br />
<br />
				SDL_BlitSurface(this->mapLayerTiles[v], &src, this->screen, &dest);<br />
			}<br />
		}<br />
	}<br />
}

Here's the map files:

<br />
map1.ml1:<br />
...............<br />
...............<br />
...|...........<br />
...............<br />
...............<br />
...............<br />
...............<br />
.........|.....<br />
...|...........<br />
...............<br />
...............<br />
...............<br />
<br />
map1.ml2:<br />
o.............o<br />
...............<br />
...............<br />
...............<br />
..............<br />
...............<br />
...............<br />
...............<br />
...............<br />
...............<br />
...............<br />
o.............o<br />
<br />
map1.ml3:<br />
...............<br />
...............<br />
..T............<br />
...............<br />
...............<br />
...............<br />
...............<br />
...............<br />
...............<br />
...............<br />
............T..<br />
...............<br />

Sorry for making it long... Blush | :O

Thanks!

Lord Kixdemp
www.SulfurMidis.com
www.SulfurSoft.tk
[ftp://][http://][hotline://]tsfc.ath.cx

Problems with a trayicon popup menu

428828-Jan-06 3:51

4288

28-Jan-06 3:51

Hi all!

I used the Chris Maunder's Systray code to implement a systray with a popup menu, but i can't figure how to set a subitem checked!

I used the SetMenuItemChecked but it failed!!

I cant go on with this!! And i can't use Chris' classes with these stuffs too because they are for Mfc projects (mine is not mfc) !!

HELP ME PLEASE!!! Frown | :(

(

---

Re: Problems with a trayicon popup menu

Owner drawn29-Jan-06 18:06

Owner drawn

29-Jan-06 18:06

You need to handle UPDATE_COMMAND_UI for that particular menu item.

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

Re: Problems with a trayicon popup menu

428829-Jan-06 19:05

4288

29-Jan-06 19:05

You mean putting ON_UPDATE_COMMAND_UI as a switched case of the main dialog msg?

Like this?

case WM_INITDIALOG:
{
....
break;
}

case ON_UPDATE_COMMAND_UI:
{

//What to do here??

break;
}

---

Re: Problems with a trayicon popup menu

Owner drawn30-Jan-06 16:50

Owner drawn

30-Jan-06 16:50

Now I am confused. I don't know whether ON_UPDATE_COMMAND_UI exists in platform sdk.

But if you are able to solve please tell me.

Thanks Big Grin | :-D

Jesus Loves Rose | [Rose]

<marquee direction="up" height="40" scrolldelay="1" step="1" scrollamount="1" style="background:#99ccff;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Defeat is temporary but surrender is permanent
--Jesus is Lord Rose | [Rose]

MS DataGrid Control 6 - Find Selected Row & Read Cell Values

sdancer7528-Jan-06 3:07

sdancer75

28-Jan-06 3:07

Hi,

How can i find the selected row and read the cell values with mouse click event using the MS DataGrid v6 ActiveX Control ?

Regardsm

sdancer75

Number of Children in a Particular Node

kandukuri27-Jan-06 23:53

kandukuri

27-Jan-06 23:53

Hi all

Can any one post a sample source code for counting the number of children excluding the grand children in a particular node in a Tree

Lovekesh

Re: Number of Children in a Particular Node

Stephen Hewitt28-Jan-06 0:43

Stephen Hewitt

28-Jan-06 0:43

If I understand your question correctly you want to count the immediate children of a node. If this is the case code like this should do it:

UINT Count = 0;
HTREEITEM hItem = m_Tree.GetChildItem(hRootItem);
while (hItem != NULL)
{
  ++Count;
  HTREEITEM hNextItem = m_Tree.GetNextSiblingItem(hItem);
}

NOTE: I haven't actually tried this! Assumes you're using MFC (although it is easily adaptable if you're not).

Steve

Re: Number of Children in a Particular Node

kandukuri28-Jan-06 3:56

kandukuri

28-Jan-06 3:56

Hi steven

the above code is not working

the while loop is iterating continously and it is not at all terminating

can u suggest me why it is happening

-- modified at 9:57 Saturday 28th January, 2006

Re: Number of Children in a Particular Node

Stephen Hewitt28-Jan-06 18:06

Stephen Hewitt

28-Jan-06 18:06

Oops, it should look like this:

UINT Count = 0;
HTREEITEM hItem = m_Tree.GetChildItem(hRootItem);
while (hItem != NULL)
{
    ++Count;
    hItem = m_Tree.GetNextSiblingItem(hItem);
}

Steve

Re: Number of Children in a Particular Node

kandukuri28-Jan-06 22:01

kandukuri

28-Jan-06 22:01

Hi stephen

I ve written another code for my problem it works for me
but if i want to retreive the child including its children
and to retreive parent of a child
how the code willbe look like

-- modified at 4:13 Sunday 29th January, 2006

MDI Without menu

bantisk27-Jan-06 23:24

bantisk

27-Jan-06 23:24

I want a MDI app withOUT a menu, any menu.

With a SDI all I have to do is override PreCreateWindow() as follows:

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
cs.hMenu = NULL; // no menu
return CFrameWnd::PreCreateWindow(cs);

}

This will not work for MDI (vs. SDI). Any ideas?

Re: MDI Without menu

Joey Bloggs28-Jan-06 2:40

Joey Bloggs

28-Jan-06 2:40

In the app after mainframe creation

m_poMainFrame->SetMenu(NULL);

In a custom CMdiClient intercept and eat

ON_MESSAGE(WM_MDISETMENU , OnMDISetMenu )
ON_MESSAGE(WM_MDIREFRESHMENU, OnMDIRefreshMenu)

Re: MDI Without menu

bruspark9-Apr-06 23:28

bruspark

9-Apr-06 23:28

HI joey Bloggs!
thank you for your reply!
i add the SetMenu(NULL).it works!@thank you very much,
but still has problems..

I add the micros to the ChildFrame as you metioned manually(there isn't WM_MDISETMENU message in my class wizard of VC6)as follow:

in the childfrm.cpp:
BEGIN_MESSAGE_MAP(CChildFrame, CMDIChildWnd)
ON_MESSAGE(WM_MDISETMENU , OnMDISetMenu )
ON_MESSAGE(WM_MDIREFRESHMENU, OnMDIRefreshMenu)
END_MESSAGE_MAP()

and int the childfrm.h i add :
afx_msg void OnMDIRefreshMenu();
afx_msg void OnMDISetMenu();

but int the functions OnMDISetMenu() and OnMDIRefreshMenu(),it can't receive the message WM_MDISETMENU and WM_MDIREFRESHMENU!

could you explain it detailedly?
thanks a lot!

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