Variant Types - C / C++ / MFC Discussion Boards

Shay Harel18-Aug-04 8:49

18-Aug-04 8:49

Hi,

I have a list control with the default multiple selection style.
The problem is that if I drag the mouse over it, it will not select all the itmes, like we do for example in a CListBox class.

If I want to select multiple items, I have to use SHIFT+ Arrow key.

How do I enable the mouse doing it

Shay

Re: Mouse selection

Ivan Cachicatari18-Aug-04 11:02

Ivan Cachicatari

18-Aug-04 11:02

To enable select multiple items using the SHIFT key and the mouse or special key combinations, create the control with LBS_EXTENDEDSEL style, or set this style with.

m_yourListCtrl.ModifyStyle(0,LBS_EXTENDEDSEL);

Ivan Cachicatari
www.latindevelopers.com

Re: Mouse selection

Shay Harel18-Aug-04 11:10

Shay Harel

18-Aug-04 11:10

The problem is that :LBS_EXTENDEDSEL is for a list box.
Is there anything for CListCtrl or CListView ?

Re: Mouse selection

Ivan Cachicatari18-Aug-04 11:31

Ivan Cachicatari

18-Aug-04 11:31

Yes,

To modify this style in a CListView use:

CListCtrl& theCtrl = GetListCtrl();
theCtrl.ModifyStyle(0,LBS_EXTENDEDSEL);

or inicialize this ina PrecreateWindow function.

BOOL CYourOwnListView::PreCreateWindow(CREATESTRUCT& cs)
{
cs.style |= LBS_EXTENDEDSEL;
return CYourOwnListView::PreCreateWindow(cs);
}

Ivan Cachicatari
www.latindevelopers.com

a better strtok ?

Maximilien18-Aug-04 8:30

Maximilien

18-Aug-04 8:30

just wondering, is there a better thing than strtok ( and related ) ?

I need to be able to count the number of delimiters as well as tokens; not really count but scan for them. if one one my delimiter is the space, I want to know that if I have 2 spaces, I will get an empty token between them.

for example, if my delimiter is ; and I have the following string :

text;text;;text;text

I wil get something like :

text
;
text
;
;
text
;
text

I could make my own version of it, but if such a thing exists, I'd be glad to use it.

I've just learned about the boot::char_separator which would do what I like, can I use only a subset of boost ?

Thanks.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: a better strtok ?

gamitech19-Aug-04 12:26

gamitech

19-Aug-04 12:26

you can just do it manually
for (
int i=1;
i<=strlen(youstring)-1;
i++
)
{
if (yourstring[i]==';')
int tokcount++;
if ((yourstring[i]==';')&&(yourstring[i+1]==';'))
int sepcount++;
}

try and tell me if this is what you want.

gabby

Re: a better strtok ?

Maximilien19-Aug-04 14:24

Maximilien

19-Aug-04 14:24

I decided that I neeeded to make my own ...

Thanks.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Variant Types

Grahamfff18-Aug-04 8:29

Grahamfff

18-Aug-04 8:29

I want to create an array of variable addresses (different types).

e.g.
void * addressArray[20]; // Is void pointer correct?

unsigned status : 4;
short data1;
long data2;
float data3;
double data4;

// Now fill the array<br />
<br />
addressArray[0] = &status;<br />
addressArray[1] = &data1;<br />
addressArray[2] = &data2;<br />
<br />
// Get the data to print it<br />
<br />
CString formatStr;<br />
<br />
formatStr.Format("Data 1 = %d", *data1);   // is *data1 correct?<br />
printf(formatStr);

Is this possible, I have heard of a type called variant but never used it.

Re: Variant Types

Ivan Cachicatari18-Aug-04 11:22

Ivan Cachicatari

18-Aug-04 11:22

Hi,

you can use the COleVariant[^] class or VARIANT struct . To manipulate use the CCrack class included un this example[^] (Optionally)

Ivan Cachicatari
www.latindevelopers.com

Re: Variant Types

Grahamfff19-Aug-04 8:51

Grahamfff

19-Aug-04 8:51

Thanks for your post. I have spent the day trying the new OleVariant and VARIANT types.
I found that the example project did not do what I required, so I opted for the VARIANT, but have a problem. When I display the data is is always a funny value and when I set it to to 0, then it always remains at 0. I have just concentrated on dealing with a unsigned short at present; but will want to deal with floats, doubles etc later
See code below:-

VARIANT varData[5];<br />
<br />
union<br />
{<br />
	// Signal	mess_13_tp1_w01_pitch;<br />
	unsigned short		mess_13_tp1_w01_data1; <br />
	// Signal	mess_13_tp1_w03_heading;<br />
	unsigned short		mess_13_tp1_w03_data2; <br />
	// Bit fields as 1 byte insigned<br />
	unsigned short		mess_13_tp1_w02_data_X; <br />
	unsigned short		mess_13_tp1_w02_data1_X; <br />
	unsigned short		mess_13_tp1_w02_data2_X; <br />
	unsigned short		buffer[32];<br />
}mess_13_m_tp1_display;<br />
<br />
<br />
VariantInit(&varData[0]);<br />
varData[0].vt = VT_UI2;<br />
varData[0].puiVal = &mess_13_m_tp1_display.mess_13_tp1_w01_data1;<br />
VariantInit(&varData[1]);<br />
//varData[0].uiVal = 0; // Init it, but then always 0 ???<br />
varData[1].vt = VT_UI2;<br />
varData[1].puiVal = &mess_13_m_tp1_display.mess_13_tp1_w02_data_X;<br />
VariantInit(&varData[2]);<br />
.<br />
.<br />
Etc<br />
<br />
// Now display/Edit the data<br />
for( j = 0; j < message.getNoFields(); j++)<br />
{<br />
m_cSignalList.SetItemText(j , 0, message.details[j].fieldDesc);<br />
m_cSignalList.SetItemText(j , 1, message.details[j].signal);<br />
formatStr.Format(message.details[j].display1,&message.varData[j].uiVal);<br />
m_cSignalList.SetItemText(j, 2, formatStr);    formatStr.Format(message.details[j].display2,message.varData[j].uiVal);<br />
m_cSignalList.SetItemText(j, 3, formatStr);<br />
m_cSignalList.SetItemText(j , 4, message.details[j].unitsStr );<br />
}

I use a ListCtrl to display and modify the data, hence the need to use VARIANTS.

Any suggestions to overcome this problem?

grahamfff

How to Save Fiels?

Zero_One_ADO18-Aug-04 7:49

Zero_One_ADO

18-Aug-04 7:49

Hello,
I want to save a file in my exe project and
use it (Read and Write),
this file is in my exe file not
in any folder!
Best Wishes,
Thanks.

Re: How to Save Fiels?

Carlos Antollini18-Aug-04 8:41

Carlos Antollini

18-Aug-04 8:41

Use the CFile class...

Regards

Carlos Antollini
Do you know piFive[^] ?

Re: How to Save Fiels?

David Crow19-Aug-04 3:07

David Crow

19-Aug-04 3:07

Zero_One_ADO wrote:
this file is in my exe file not

Meaning that it is in the exe's resource table? If so, are you wanting to extract the resource and save it to a separate file?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: How to Save Fiels?

gamitech19-Aug-04 12:29

gamitech

19-Aug-04 12:29

save them as resources.

gabby

About SetCursor?

Zero_One_ADO18-Aug-04 7:47

Zero_One_ADO

18-Aug-04 7:47

Hello,
I have an Owner-Drawn Button.
I want to change the cursor when my
Mouse is Over the Button,
Best Wishes,
Thanks.

Re: About SetCursor?

vcplusplus18-Aug-04 8:28

vcplusplus

18-Aug-04 8:28

Process the WM_SETCURSOR message.

BOOL CMyView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	switch(pWnd->GetDlgCtrlID())
	{
		case IDC_BUTTON_1:
			SetCursor(AfxGetApp()->LoadStandardCursor(IDC_IBEAM));
                        or
			SetCursor(AfxGetApp()->LoadCursor(IDC_MY_CURSOR));
			return TRUE;
         		break;
		case IDC_BUTTON_2:
			SetCursor(AfxGetApp()->LoadStandardCursor(IDC_CROSS));
			return TRUE;
         		break;
	}
	return CFormView::OnSetCursor(pWnd, nHitTest, message);
}

Unresolved external error: LNK2001

crushinghellhammer18-Aug-04 7:02

crushinghellhammer

18-Aug-04 7:02

I'm porting code written in C++ for a Motorola ColdFire chip to Visual C++.

In the original program I have two files which I will call Code.cpp and Code.h

Code.h has the class and member function declarations and Code.cpp has member function definitions and the operative code.

The main class for the program is, let's say, cMain, which has a bunch of nested classes.

Now in my Code.cpp file, after the declarations of the constants, I had the following line

extern cMain Main;

In Visual C++ (VS2003) this throws an LNK2001 error. If I remove the extern the program compiles without error.

Could somebody please explain why this is so? When should an object be instantiated using "extern" in VC++ (VS2003)?

Thanks!

Re: Unresolved external error: LNK2001

Mike K. Clark18-Aug-04 14:06

Mike K. Clark

18-Aug-04 14:06

Linker Tools Error LNK2001

When your writing code you have to label the functions, variables, classes, etc... If you label something that it cannot find or is listed twice you will receive an LNK2001 process error. If that doesn't work try this on the main menu of Visual C++ go to project settings, and click on the C/C++ tab. remove _ATL_MIN_CRT from the preprocessor definitions, although depending on what version of Visual C you are running it may automatically be removed. Most likely however their is a function or variable that is listed twice in the Class tree, which again is causing compilation errors. Although if this doesn't work try looking at the error itself at msdn.

Here is the link

feel free to email me if you have any more questions or are still receiving problems

-Mike

LNK2005

фил18-Aug-04 7:00

фил

18-Aug-04 7:00

hi, there.

please help me with this urgent problem i have.

use the wizard to build a regular mfc dll project.
include 2 files in your project:
a.h
int a;
a.cpp
#include "stdafx.h"
#include "a.h"
#include "a.h" in your CWinApp derived class' .cpp file.

why the hell do you get LNK2005??

thank you

Я люблю русский языкь!

Re: LNK2005

Antony M Kancidrowski18-Aug-04 13:42

Antony M Kancidrowski

18-Aug-04 13:42

Sorry I do not quite understand what you have written.

Although see here LNK2005[^] for reason why you get LNK2005 errors.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

OwnerDrawn ComboBox & CDialogBar

AJ12318-Aug-04 6:35

AJ123

18-Aug-04 6:35

Hi,

I am trying to place an OwnerDrawn ComboBox on a DialogBar. To do this i create a class derrived from CComboBox, and this works fine on a standard CDialog. But i want the control placed on a CDIalogBar. How do i get MFC to instantiate the ComboBox from the derived class rather than CComboBox. Initially i went to use the ClassWizzard to create a class to represent the CDialogbar, however it doesn't allow you to have a base class of CDialogBar and i believe you can't use CDialog in this situation. Anyone any suggestions?

Thanks in advance
Rich

Re: OwnerDrawn ComboBox & CDialogBar

AJ12318-Aug-04 9:28

AJ123

18-Aug-04 9:28

Found an MSDN article for this scenario - 185672. What sort of forum is this if you have to reply to yourself! Wink | ;)

Doc/View and CTRL+TAB

Jay Carter18-Aug-04 6:05

Jay Carter

18-Aug-04 6:05

Hi All,

I want to trap the ctrl+tab, ctrl+f6 etc. in my MDI app, so I can stop WM_MDINEXT, WM_MDIPREV...

I do not want to get into key trapping if possible.

Anyone got any thoughts.

Thanks
Jay

Doc/View and CTRL+TAB

Jay Carter18-Aug-04 6:05

Jay Carter

18-Aug-04 6:05

Hi All,

I want to trap the ctrl+tab, ctrl+f6 etc. So I can stop WM_MDINEXT, WM_MDIPREV.
I do not want to get into key trapping if possible.

Anyone got any thought.

Thanks
Jay

NIIF_NONE

BlackDice18-Aug-04 5:30

BlackDice

18-Aug-04 5:30

I downloaded some code off of this site that has the constant NIIF_NONE in it. This has happened to me before, and now again where my app won't build because it can't find these constants. It says in the documentation for the source that this and the other NIIF_ constants are defined in shellapi.h, but I can't find them there. Any help?

[insert witty comment here]

bdiamond Sleepy | :zzz:

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