C / C++ / MFC Discussion Boards

Re: Trying to pass info between modal dlg and MDI view?

Ravi Bhavnani11-Aug-02 6:49

11-Aug-02 6:49

nss wrote:
how do I transfer the contents of my CEdit into the doc var when the user enters the input and presses enter

Just add this to your OnDone() handler:

ASSERT (m_pDoc != NULL);
GetDlgItemText (IDC_MyEdit, m_pDoc->m_someString);

/ravi

Let's put "civil" back in "civilization"
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ravib@ravib.com

Re: Trying to pass info between modal dlg and MDI view?

nss10-Aug-02 13:39

nss

10-Aug-02 13:39

Heres what you are saying: Let the onOk handler be blank (no base onOk call).

Delete the OK button?

Put in new button and different ID - call base OnOk in it. So - should I delete the Ok button or invisible it or rename its ID to ID_EXIT?

Re: Trying to pass info between modal dlg and MDI view?

l a u r e n10-Aug-02 22:35

l a u r e n

10-Aug-02 22:35

just rename the caption of the button to 'Done' for example and change its id to IDC_DONE for example ... add a click event handler and call the CDialog::OnOK(); at the end of the processing u want done there

to exchange all the data vars u can use UpdateData(TRUE) to get all the values the user entered (some ppl prefer not to use the DataExchange stuff and get the values out manually)

"... and so i said to him ... if it don't dance (or code) and you can't eat it either f**k it or throw it away"
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Re: Trying to pass info between modal dlg and MDI view?

nss11-Aug-02 3:20

nss

11-Aug-02 3:20

Thank you!
ns

problem - when to call UpdateData? Where to call it from?

nss11-Aug-02 3:33

nss

11-Aug-02 3:33

to exchange all the data vars u can use UpdateData(TRUE) to get all the values the user entered

When do I call UpdateData? after the user finishes entering data into the CEdit what should he do? The UI has to trigger some function where Updatae data gets called right? I'm confused. I was hoping to have the user put in the data, press enter and somehow the doc var to get updated magicallly. But which function is going to run where I can call UpdataDAte when Enter is pressed. Do uou see my dilemma?
Thanks for helping...
ns

Re: Trying to pass info between modal dlg and MDI view?

Ravi Bhavnani11-Aug-02 6:29

Ravi Bhavnani

11-Aug-02 6:29

Delete the IDOK button.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Including files as a resource

User 665810-Aug-02 8:37

User 6658

10-Aug-02 8:37

Hi!

Is there a way to include files into a project as a resource that still can be read using fopen() ?

Currently my app is reading some data from an external file that is in my app's directory. But I do not want the user to change this file, so I want to include it as a resource into my EXE/DLL. Is this possible?
If it is possible, how can I then read it with the standard I/O functions?

thanks in advance

modified 12-Sep-18 21:01pm.

Re: Including files as a resource

C^hris L^osinger10-Aug-02 10:34

C^hris L^osinger

10-Aug-02 10:34

the easiest way is to open/lock the resource then dump the contents to a temporary file.

-c

Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten

image effects!

Re: Including files as a resource

User 665810-Aug-02 11:01

User 6658

10-Aug-02 11:01

thanks for your reply!

I'm aksing myself whether this is possible:
Currently my app reads a whole file into a variable called "cache"

fread(cache, sizeof(char), buf.st_size, db);

I thought it would be nice to put the database (db) into my exe as a resource, so that I directly could set the buffer like that:

cache = (unsigned char*)rc_dat;

rc_dat is the content of the resource I'v got from the LockResource call.

But I think it doesn't work as expected

modified 12-Sep-18 21:01pm.

Re: Including files as a resource

User 665810-Aug-02 11:54

User 6658

10-Aug-02 11:54

Don't care about it anymore. Everything works fine Smile | :)

modified 12-Sep-18 21:01pm.

GDI Resource allocation

Stew10-Aug-02 8:36

Stew

10-Aug-02 8:36

My application makes extensive use of the GDI resources. I use them to draw text in the view using specific font information etc... Anyway, the application terminates due to the fact that it eats up all of the system's available GDI resources. I'm trying to eliminate this issue but have had no luck. Even when using the DeleteObject() function, the GDI resources are never freed. Does anyone know how to free the GDI resources successfully?

Re: GDI Resource allocation

NormDroid10-Aug-02 9:39

NormDroid

10-Aug-02 9:39

ooooooooooooh...

CPen pen;
pen.CreatePen(PS_SOLID,1,RGB(255,0,0);

dc.SelectObject(&pen);

pen.DeleteObject(&pen);

problem...

SelectObject selects your pen and give you the previous pen. This must be selected back in the dc before pen is deleted.

so...

CPen* pPrevPen dc.SelectObject(&pen);

... do some drawing

dc.SelectObject(pPrevPen)

pen.DeleteObject(&pen);

and this goes for every GDI object you select into the DC, fonts, brush, etc.

Normski. - the next bit of code is self modifying ... jmp 0xCODE

Re: GDI Resource allocation

Stew10-Aug-02 11:12

Stew

10-Aug-02 11:12

I'm selecting the old pen back into the DC and deleting the object, but I'm not getting the resources to free up on my system. I've tried using the CAutoPen class that I found on this site to initialize, select, and delete the Pen object from the DC. I've also tried using the CPen class and just creating a pen, selecting it into the DC, using it, selecting the old pen back into the DC, and deleting the object. Neither method has worked. I'm not sure what I'm doing wrong to hold these GDI resources.

Context Menu & Dialog Box :: MFC

valikac10-Aug-02 7:42

valikac

10-Aug-02 7:42

Hi.

I would like to implement a context menu inside a dialog box. I created a "clear" menu (no caption) using Resource Editor. Note that I create an entirely new menu item like IDR_MAINFRAME (mine is IRD_CONTEXTMENU1. Inside the dialog box, I added a message for right-click. Here is what the code looks like.

-----
CPoint mPointCurrent;
::GetCursorPos(&mPointCurrent);
CMenu mPopupMenu;
mPopupMenu.LoadMenu(IRD_CONTEXTMENU1);

// Program crashes at this point.

CMenu *pContextMenu = mPopupMenu.GetSubMenu(0);
pContextMenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RETURNCMD | TPM_NONOTIFY,
mPointCurrent.x, mPointCurrent.y, GetActiveWindow(), NULL);
-----

The code above does not work. The program crashes when I right-click inside the dialog box. Is the code above for a view class only? Is there a different and corrent way to implement a context menu inside a dialog box?

Thanks,
Kuphryn

Re: Context Menu & Dialog Box :: MFC

Jan Hirak10-Aug-02 7:54

Jan Hirak

10-Aug-02 7:54

I thing your problem is that you are passing argument &mPointCurrent in client coordinates. You need to implement function ClientToScreen()and converse it into screen coordinates.

ClientToScreen(&mPointCurrent);//after mPopupMenu.LoadMenu

Re: Context Menu & Dialog Box :: MFC

Shog⁹10-Aug-02 8:06

Shog⁹

10-Aug-02 8:06

No, ::GetCursorPos() returns screen coordinates, and that's what TrackPopupMenu() expects. I do wonder if maybe having both TPM_LEFTBUTTON and TPM_RIGHTBUTTON set could be causing problems though...

---

Shog⁹
If I could sleep forever, I could forget about everything...

Re: Context Menu & Dialog Box :: MFC

Shog⁹10-Aug-02 8:00

Shog⁹

10-Aug-02 8:00

I don't know.

But, you can rule out a couple of things right off: put in an ASSERT() for pContextMenu, and for GetActiveWindow(). If either one triggers, there's your problem:

CMenu *pContextMenu = mPopupMenu.GetSubMenu(0);
ASSERT(NULL != pContextMenu);
ASSERT(NULL != GetActiveWindow());

---

Shog⁹
If I could sleep forever, I could forget about everything...

Re: Context Menu & Dialog Box :: MFC

valikac10-Aug-02 8:32

valikac

10-Aug-02 8:32

Okay. Thanks.

I found the problem.

// The menu ID was incorrect
-----
CMenu mPopupMenu;
mPopupMenu.LoadMenu(IRD_CORRECTMENUID);
-----

Kuphryn

Set right alignment fo tab stops

Jan Hirak10-Aug-02 7:33

Jan Hirak

10-Aug-02 7:33

I’m using SetTabStops() function in CListBox class., but I can’t figure out how to set a right alignment for tabs. Is there any way to do it? Please help.

Re: Set right alignment fo tab stops

Shog⁹10-Aug-02 8:09

Shog⁹

10-Aug-02 8:09

I've never heard of it being possible, though someone else may have. You may just want to go with CListCtrl though, it's a bit nicer for doing columns (and supports left/center/right alignment).

---

Shog⁹
If I could sleep forever, I could forget about everything...

Is there a way to print into ms word or wordperfect? DDE?

DanYELL10-Aug-02 6:34

DanYELL

10-Aug-02 6:34

I read that dynamic data exchange (DDE) let's you interface
with ms word. How can I print my output into ms word? Is this possible?

Please, any response any one can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student)

How to handle drag-n-drop zipped content?

Hiusing10-Aug-02 6:24

Hiusing

10-Aug-02 6:24

Hello,
Trying to accept a file from a zipped file from Windows Explorer. What information I should set to FORMATETC struct in order to know it's zipped file? Thank you!

Memory Management

Stew10-Aug-02 6:21

Stew

10-Aug-02 6:21

After working in my application for a while, I'm getting an error when I try to create a Pen for drawing in the view. I assume it's some sort of memory issue, but I'm not sure. Is there any way for me to tell, conclusively, if it is a memory issue and is there any way for me to find out what it is that's causing the problem? I figure I'm not freeing something, but I thought that I got all of the memory allocation stuff.

Well, after watching the system monitor while executing my application, I've figured out that it's GDI resources that are the issue. Apparently, I'm not freeing the resources. How can I do that? I've tried inserting DeleteObject() statements but that doesn't seem to do anything for me.

Re: Memory Management

Maximilien10-Aug-02 6:30

Maximilien

10-Aug-02 6:30

Remember to always release objects.

<br />
 ...<br />
 CPen* pOldPen = NULL;<br />
 CPen* pNewPen = NULL;<br />
 pNewPen = new CPen(/* whatever */ );<br />
<br />
 pOldPen = SelectObject ( pNewPen );<br />
 ... // do something ...<br />
 <br />
 (void) SelectObject ( pOldPen );<br />
 ...<br />
<br />
 delete pNewPen;<br />
<br />

Or other stuff like that ...

Max.

Re: Memory Management

Todd Smith11-Aug-02 8:15

Todd Smith

11-Aug-02 8:15

Get BoundsChecker. It find most of your memory and resource leaks.

Todd Smith

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