C / C++ / MFC Discussion Boards

De Nardis Andrea16-Oct-03 3:29

16-Oct-03 3:29

Hi all,
I have to display some dropdown combobox so I am using
CComboBox::Create. My combo regularly appears with the edit part the right
size, but when I cick on in the list part is 0-heigthed.
Some silly question:
- what is the heigth of a combo? the edit heigth or the edit + list
heigth?
- is the CComboBox::SetItemHeigth suitable for me? I tried it but nothing
changed!
Could you please help me?
Best regards.
Andrea Smile | :)

Re: CComboBox

David Crow16-Oct-03 7:07

David Crow

16-Oct-03 7:07

This worked for me:

cb.Create(WS_CHILD|WS_VISIBLE|WS_VSCROLL|CBS_DROPDOWNLIST,CRect(10,10,200,150),this,987);

What are you doing different?

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

Re: CComboBox

De Nardis Andrea16-Oct-03 8:04

De Nardis Andrea

16-Oct-03 8:04

Thanx guy this worked for me also!!!!
Thanx a lot Smile | :)

bluetooth

da_adel16-Oct-03 3:28

da_adel

16-Oct-03 3:28

has anybody worked with bluetooth yet ??

i need to use a bluetooth usb stick for my software,
but i have no idea how to program it.
i have found something in the microsoft sdk's
documentation...but it's not very useful. i need somebody who has already worked with it...or some example code or
headers or something...

please help!

how do i make a bitmap appear on a button when i click on the button

swerajan16-Oct-03 2:51

swerajan

16-Oct-03 2:51

I have a MFC application in CFormView. I have added 9 buttons, for a tic-tac-toe program. I should be able to click on the button and get either a X or 'O' on the button when i click on it. I have tried using the loadbitmap and setbitmap. it is not working. can anybody please me how to do this, or provide any link that does something similar. thanks

Owner Drawn CHeaderCtrl Items

Uller16-Oct-03 1:58

Uller

16-Oct-03 1:58

All right... Mad | :mad:

... I spent all day yesterday beating my head on the wall trying to get this to work. I have a need to draw the header items of a CHeaderCtrl myself.

I declared my class like this:

class CHPTHeaderCtrl : public CHeaderCtrl
{
public:
//member function declarations go here...
void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);

private:
//member vars go here
}

My DrawItem function is implemented as follows:
void CHPTHeaderCtrl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
//draw stuff here
}

I create my header control like this:

BOOL Header = m_Header.Create( WS_CHILD | WS_VISIBLE | HDS_BUTTONS | S_HORZ,
rect, CWnd::FromHandle(m_hWnd));

I insert items like this (in an insert function):

HDITEM hdi;

hdi.mask = HDI_TEXT | HDI_FORMAT | HDI_LPARAM;

hdi.cxy = Width;
hdi.fmt = HDF_OWNERDRAW;
hdi.lParam = (LPARAM)pHeaderData;
hdi.pszText = (LPTSTR)strText;

CHeaderCtrl::InsertItem(p_iPosition_i, &hdi);

The result is that my header control draws fine. I can click the buttons, add new columns, (drag and drop if I use the drag/drop flag), etc. Everything seems to work fine, but my DrawItem function is NEVER called!!! Is there something I'm missing?

Thanks.

Re: Owner Drawn CHeaderCtrl Items

Roger Allen16-Oct-03 2:19

Roger Allen

16-Oct-03 2:19

You probably have to set the owner draw flag like this:

HDITEM hdItem;
hdItem.mask = HDI_FORMAT;
for (int i = 0 ; i < m_HeaderCtrl.GetItemCount(); i++)
{
	m_HeaderCtrl.GetItem(i,&hdItem);
	hdItem.fmt|= HDF_OWNERDRAW;
	m_HeaderCtrl.SetItem(i,&hdItem);
}

Roger Allen
Sonork 100.10016

Death come early, death come late,
It takes us all, there is no reason.
For every purpose under heaven,
To each a turn, to each a season.
A time to weep and a time to sigh,
A time to laugh and a time to cry,
A time to be born and a time to die.
Dust to dust and ashes to ashes,
And so I end my song.

Re: Owner Drawn CHeaderCtrl Items

Uller16-Oct-03 3:39

Uller

16-Oct-03 3:39

I tried that. No worky.

I set break points in wincore.cpp and I don't think the message is ever getting to where it needs to go.

Re: Owner Drawn CHeaderCtrl Items

Uller16-Oct-03 2:21

Uller

16-Oct-03 2:21

One more item that might be important...

The m_hWnd I'm using references is an ATL Control. It is hosted in a CWnd. I just figured out that if I change "CWnd::FromHandle(m_hWnd)" to CWnd::FromHandle(this->GetParent())" my DrawItem function gets called. The header is drawn in the wrong place (since it is now drawn in the parent), but I can get around that if I have to.

Edit: Never mind. That doesn't actually work. I thought it was.

It seems like the problem is that the message is just never getting down to my window. In wincore.cpp in the CWnd::ReflectLastMsg function and the LookupPermanent call is failing. So I think there is something wrong with the way I have things setup.

Re: Owner Drawn CHeaderCtrl Items

Roger Allen16-Oct-03 5:25

Roger Allen

16-Oct-03 5:25

Take a look at this article which uses the DrawItem method for a multiline header items:

Multiline header control[^]

This method should work, as I use it in one my apps.

Roger Allen
Sonork 100.10016

Death come early, death come late,
It takes us all, there is no reason.
For every purpose under heaven,
To each a turn, to each a season.
A time to weep and a time to sigh,
A time to laugh and a time to cry,
A time to be born and a time to die.
Dust to dust and ashes to ashes,
And so I end my song.

Re: Owner Drawn CHeaderCtrl Items

Uller16-Oct-03 7:33

Uller

16-Oct-03 7:33

I found the answer! (or at least _an_ answer)

For _most_ applications, I think the Multiline header control way of doing things will work just fine, but unfortunately, I'm constrained to an environment where that doesn't work and I have to use a custom ATL control and this just doesn't work. So...

The ATL control that hosts the header gets WM_DRAWITEM messages. So I just made a handler for that and called my DrawItem function directly. Big Grin | :-D

Thanks for your help though!

Image resolution..

Neha16-Oct-03 1:42

Neha

16-Oct-03 1:42

Hi,

Is there any way to get the resolution of an image file(.bmp file) other than refering to biXPelsPerMeter value?

Regards
Neha

infix to postfix

16-Oct-03 0:45

i need to write a c++ program that converts a expression in infix form to postfix form
how to do this job?
can someone kindly help me in this regard!

ranjani

How to draw selection with different color??

Umesh Sharma16-Oct-03 0:42

Umesh Sharma

16-Oct-03 0:42

Hi,
In my client area I have some text. During selection, my text color is inverted that is implemented by ::invertRect() API. This api just invert the bits of the area specifed in the invertRect parameter.
I want my back color during selection should be of different color which I will select. Iam not getting how and what raster operation to do... Confused | :confused:

..
So plz let me know how I can do it using any Raster Operation.

Umesh

Its ATTITUDE not APTITUDE that help One to achieve ALTITUDE.

How to make .ACS(agent character storage)

sunju16-Oct-03 0:34

sunju

16-Oct-03 0:34

Hi All
I want to ask question about MSAgent character editor.

1. Can i create my own "STATE" in MSAgent character editor. There are pre-defined "state" in MSAgent character editor,so i want to add more. Can i do it.

2. What is the meaning of one state with multiple animation.

Unexpected Win32 Thread when using sockets

Niklas Andersson15-Oct-03 23:30

Niklas Andersson

15-Oct-03 23:30

I'm quite confused!

Writing a simple win32 console application using sockets, I get an unexpected "Win32 Thread" in my application.

The following sample application has two thread (the main thread, and the unexpected win32 thread".

Has anyone noticed this, and what is this extra thread used for?

#include "winsock2.h"<br />
<br />
void main()<br />
{<br />
    WSADATA info;<br />
    <br />
    if(WSAStartup(MAKEWORD( 2, 0 ),&info))<br />
	    return;<br />
<br />
  	char name[1000];<br />
	int len=1000;<br />
<br />
	gethostname(name,len); // this call spawns an extra thread<br />
<br />
    Sleep(10000);<br />
	<br />
    WSACleanup();<br />
}

PS: I link to ws2_32.lib

// Niklas

Re: Unexpected Win32 Thread when using sockets

cmk16-Oct-03 9:20

cmk

16-Oct-03 9:20

It's ok, it's part of the WinSock system.
When you call WSAStartup it does a bunch of stuff, create pipes, initialize structures, create monitor thread.
I would expect it to go away when you call WSACleanup.

There is a port of WinSock, with source, as part of Wine (? i think).
If you look at their source you will see what the other thread is/can be used for.

...cmk

Save the whales - collect the whole set

RemoveDirectory - help

Boby.George15-Oct-03 23:08

Boby.George

15-Oct-03 23:08

I cannot remove a blank directory in Windows 2000 using RemoveDirectory whilst I can do the same with same code in windows 98 - Please Help

boby

Re: RemoveDirectory - help

murali_utr16-Oct-03 0:33

murali_utr

16-Oct-03 0:33

removedirectory surely works in 2000. check what's the error occured while removedirectory() thru getlasterror(). for details refer MSDN. otherwise you can try _rmdir() function.

Murali.M

there is always one more bug.........

Re: re you?

jhwurmbach15-Oct-03 22:55

jhwurmbach

15-Oct-03 22:55

bochan wrote:
how a

Beer | [beer]

Here! Another one for you! Big Grin | :-D

But probably :grass: would be more appropriate?!

Who is 'General Failure'? And why is he reading my harddisk?!?

Class Problem?

wow999915-Oct-03 21:43

wow9999

15-Oct-03 21:43

//A.h
Class A
{
A(int i, int j);

int GetIJ();
int K,L;
}
//A.cpp
{
A::A(int i, int j)
{
K=i;
L=j;
}

A::GetIJ()
{
int M=K+L;
return M;
}
}

//B.cpp
A *ATemp;
{
void B::FirstFunction()
{
int a=5;
int b=6;
A aTest(a,b); //Create a A Instance "aTest"
ATemp=&aTest; //assign aTest to ATemp
}
void B::SecondFunction()
{
int XYZ=ATemp->GetIJ();
//Is this correct? If this is wrong please tell me why
}
}
**************
Can I Create a Object in one function and using the object at another function?

Re: Class Problem?

souldog15-Oct-03 22:26

souldog

15-Oct-03 22:26

Not this way. You have created the object on the stack in the first function and so the object is destroyed when the function returns. Therefore, your pointer to this object is no longer valid outside the
scope of the first function. There are lots of ways to approach this
problem, but one is to return an object of type A by value from the first
function and assign it to another object of type A which is declared outside
the function. The best method depends on the cost of creating and assigning the object.

How catch a button in the system taskbar?online wait!

Paristam15-Oct-03 21:14

Paristam

15-Oct-03 21:14

I need get a button in the system taskbar,now I have got a pointer of the taskbar,but I can't catch a specific button in this taskbar,Please help me,thanks.

How do I programatically add a RAS direct connection via COM5, not just only start the wizard ?

Thomas Rinshofer15-Oct-03 21:13

Thomas Rinshofer

15-Oct-03 21:13

How do I programatically add a "Direct Connection between to Computers" assigned to COM5 ?

Just start the "Add Modem Dialog" is not a solution for me.
WinExec("rundll32.exe shell32.dll,Control_RunDLL Modem.cpl,,add",1);

Adding a Phonebook entry to this device with RasEnumDevices and manipulate the entries for SLIP is no Problem.

Help me!Very hurry!

Paristam15-Oct-03 20:14

Paristam

15-Oct-03 20:14

I created a dialog without title bar,so it has not a combine button in system taskbar,I used "ModifyStyleEx" Func to add a button in taskbar,then I used "LoadIcon" and "SetIcon" add a icon to this dialog.

The Question occured: when I pressed "ALT"+"TAB" two keys,this Application icon show in window is a system icon!!The icon in taskbar is mine only!

Why??Thanks.

------------------------------------------------------
Jerry Wong
Http://www.alphastudio.org
MSN:hotalpha@hotmail.com

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