Re: MFC COM dll - C / C++ / MFC Discussion Boards

Re: How do I get the last LVN_ITEMCHANGED message?

hsuch6-Sep-07 19:54

6-Sep-07 19:54

I click one item in the list-view control, hold down shift key, click another item, then I can select the items between the first and the last one. After that, I draw selection lines in another window for those items to indicate they are selected. Because I know windows will produce a bundle of messages to notify this operation, I draw my window just once after these messages to get better performance.

"stop changing" ==> windows won't generate selection messages anymore for this operation

Depending on windows' behavior, if there are few seconds between the messages, it should be the next selection operation. I know it is the first of the next group since it comes after my last timer event.

Re: How do I get the last LVN_ITEMCHANGED message?

David Crow7-Sep-07 2:34

David Crow

7-Sep-07 2:34

hsuch wrote:
I click one item in the list-view control, hold down shift key, click another item, then I can select the items between the first and the last one.

This is the default behavior for a multiselect list control. Why are you having to intervene?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: How do I get the last LVN_ITEMCHANGED message?

hsuch7-Sep-07 10:33

hsuch

7-Sep-07 10:33

Well, because my drawing function always draw all selected objects, even only one object changes the state. ><" I'm trying to decrease the overhead. My idea is to draw as less as possible.

I google around and find some solutions like to set a timer or to add the owner-draw style. Maybe that's the way to go.

Re: How do I get the last LVN_ITEMCHANGED message?

David Crow7-Sep-07 10:38

David Crow

7-Sep-07 10:38

Do you have an owner-drawn control?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: How do I get the last LVN_ITEMCHANGED message?

hsuch8-Sep-07 3:34

hsuch

8-Sep-07 3:34

Sorry, the owner-drawn style also generates a lot of messages. But the LVS_OWNDERDATA style always generates 3 messages each operation. I have improved my timer logic and it works fine right now. Thanks for your help.

Re: How do I get the last LVN_ITEMCHANGED message?

David Crow10-Sep-07 4:22

David Crow

10-Sep-07 4:22

So if you are not using an owner-drawn control, why are you having to draw anything selection-related? That is handled by the control itself.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

MFC COM dll

sawerr6-Sep-07 1:56

sawerr

6-Sep-07 1:56

Hi When i create a MFC DLL with Automation option selected, wizard creates some functions for me. For example DllGetClassObject, DllRegisterServer

If i add second com class to my dll, how must i change the CoGetClassObject, DllRegisterServer code?

I see all the sample codes are about one class in one dll. i dont know what must be done if i want to add more than one class.

Also i wonder this:
If one dll contains 3 com class, it means there are 3 servers in one dll?

Re: MFC COM dll

Matthew Faithfull6-Sep-07 6:48

Matthew Faithfull

6-Sep-07 6:48

It's hard to explain COM in a small book let a lone in a short post so the best thing I can do is say try it and see. Try creating 3 separate Dlls, one object in each with the wizard and see where the code is the same and where it's different and if you can combine them manually. Also the theory of COM is different from the implementation of COM objects within a framework like MFC or ATL. Framework implementation details like COM Maps can be very confusing if you don't already understand what they're trying to achieve.
Learning by fiddling has always been the best way to learn programming and not just because that's how I did it. Big Grin | :-D

Nothing is exactly what it seems but everything with seems can be unpicked.

How to set fontsize??

Neo Andreson6-Sep-07 0:25

Neo Andreson

6-Sep-07 0:25

How to set fontsize while printing??

Re: How to set fontsize??

jhwurmbach6-Sep-07 0:58

jhwurmbach

6-Sep-07 0:58

Select the correct font into the Print-DC.

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Re: How to set fontsize??

Hamid_RT6-Sep-07 7:52

Hamid_RT

6-Sep-07 7:52

Did you try to set font on the DC ?

Re: How to set fontsize??

C^hris L^osinger6-Sep-07 10:36

C^hris L^osinger

6-Sep-07 10:36

use CreateFont to create a font of the size you need

image processing toolkits | batch image processing

Command ID

baerten6-Sep-07 0:09

baerten

6-Sep-07 0:09

Hi everybody,

i create a RibbonMenu with dynamically added Buttons.

each Button gets a Command ID of WM_USER+100+i (i is incremented by i++)

Now the two questions:

Is there a Handler to catch an array of commands from WM_USER+101 till WM_USER+110 ?

The RibbonBar searches the command ID into the StringResource and uses the string as ButtonText
and Button-Tooltip
Is it possible to create dynamically a StringResource?

Big thanks for help ! Smile | :)

Re: Command ID

Nishad S6-Sep-07 1:22

Nishad S

6-Sep-07 1:22

baerten wrote:
Command ID of WM_USER+100+i

Does it button ID, like IDOK, IDCANCEL, etc. ?

- NS -

Re: Command ID

Cedric Moonen6-Sep-07 1:36

Cedric Moonen

6-Sep-07 1:36

baerten wrote:
Is there a Handler to catch an array of commands from WM_USER+101 till WM_USER+110 ?

Yes, take a look at ON_COMMAND_RANGE[^] macro.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: Command ID

baerten6-Sep-07 4:40

baerten

6-Sep-07 4:40

Big thanks for your help Smile | :)

How to put the Tool tip On Button. [modified]

GauranG Shah5-Sep-07 23:53

GauranG Shah

5-Sep-07 23:53

Can Anybody tell me how tp Put the tool tip on Button

I am Using Win32 Application.

I find some thing from MSDN Regarding this. I am using Followind code but it gives error.
It is NotGetting the Handle of ToolTipWnd;

ToolTipWnd = CreateWindow(TOOLTIPS_CLASS,NULL, WS_POPUP, 0,0,0,0, hWndDlg, NULL,hInst, 0);<br />
<br />
				if ( ToolTipWnd == NULL )<br />
				 {<br />
					 DWORD Error;<br />
					 Error = GetLastError();<br />
					MessageBox(NULL,L"Error",L"",0);<br />
				}<br />
<br />
					SendMessage(ToolTipWnd, TTM_ACTIVATE, TRUE, 0); // Send this message to Activate ToolTips for the window<br />
						// Pass a FALSE when you wish to deactivate the tool tip.<br />
<br />
						//To assign a tool tip to a control do the following:<br />
						TOOLINFO toolinfo; // Tool Tip Info structure<br />
<br />
						memset(&toolinfo, 0, sizeof(TOOLINFO));<br />
<br />
						toolinfo.cbSize = sizeof(TOOLINFO);<br />
						toolinfo.hwnd = hWndDlg;<br />
						toolinfo.uFlags = TTF_SUBCLASS | TTF_IDISHWND;<br />
						toolinfo.uId = IDC_BUTTON1;/*ID_OF_CONTROL;*/<br />
						toolinfo.hinst = NULL;<br />
						toolinfo.lpszText =L"Hi ,,,,,,,,,,"; // Text you wish displayed when the mouse is over the control<br />
                         DWORD error;<br />
						if(!SendMessage ( hWndDlg, TTM_ADDTOOL, 0, (LPARAM)&toolinfo ))<br />
						{<br />
							error = GetLastError();<br />
							MessageBox(NULL,L"Error",L"",0);<br />
						}

-- modified at 7:36 Thursday 6th September, 2007

Re: How to put the Tool tip On Button.

Nishad S6-Sep-07 1:30

Nishad S

6-Sep-07 1:30

This[^] will be a good start... Smile | :)

- NS -

Re: How to put the Tool tip On Button.

GauranG Shah6-Sep-07 1:55

GauranG Shah

6-Sep-07 1:55

hi.
Thanx for your reply. I Due to some problem I am not able to open that link.Actully i m not allowed to open Microsoft site. So can u tell me whats in it.

Re: How to put the Tool tip On Button.

Nishad S6-Sep-07 2:05

Nishad S

6-Sep-07 2:05

So I shall mail you the content... Smile | :)

- NS -

Re: How to put the Tool tip On Button.

GauranG Shah6-Sep-07 3:47

GauranG Shah

6-Sep-07 3:47

will be nice if u do so. or better if u tell me where i am wrong in my code.

What does this do ??

Programm3r5-Sep-07 23:44

Programm3r

5-Sep-07 23:44

Hi all,

I would like to know what the following does (does it operate like an if statement or something):

m_bIsConnected = ret == SQL_SUCCESS || ret == SQL_SUCCESS_WITH_INFO;

Many Thanks
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: What does this do ??

Cedric Moonen5-Sep-07 23:50

Cedric Moonen

5-Sep-07 23:50

Programm3r wrote:
does it operate like an if statement or something

Yes, something like that. In fact, the expression ret == SQL_SUCCESS 'returns' a boolean (true if they are equals, false if they are different). The same with the || operator. Thus, the complete expression returns a boolean, which is stored in m_bIsConnected.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: What does this do ??

Programm3r5-Sep-07 23:51

Programm3r

5-Sep-07 23:51

Thanks Cedric Smile | :)

Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

sleep function

p_5-Sep-07 23:38

5-Sep-07 23:38

hi all masters
i use sleep(5); in vc++(MFC) but error is that undeclared identifier

is there any other way to declare it

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