C / C++ / MFC Discussion Boards

Re: cancel dialog -- ok then how

G Haranadh13-Mar-07 21:59

G Haranadh

13-Mar-07 21:59

Parthi_Appu wrote:
Do your Duty and Don't expect the Result

Nice Quote. Rose | [Rose]

Nice talking to you. Blush | :O

If you judge people, you have no time to love them. -- Mother Teresa

Re: cancel dialog -- ok then how

Parthi_Appu13-Mar-07 22:05

Parthi_Appu

13-Mar-07 22:05

Hey Thanx.. Big Grin | :-D

But the quote was taken from Bahavat Gita (Ctrl+C, Ctrl+V) :->

Do your Duty and Don't expect the Result

Re: cancel dialog

G Haranadh13-Mar-07 21:57

G Haranadh

13-Mar-07 21:57

I think property pages is better way for this kind of concept. Rose | [Rose]

Nice talking to you. Blush | :O

If you judge people, you have no time to love them. -- Mother Teresa

Overview of a Handle

Kotesh.N13-Mar-07 18:33

Kotesh.N

13-Mar-07 18:33

Hi,

I have a small query regarding HANDLE. What exactly it means. what type of data it will stores. Is there an specific structure
ot the HANDLE

Chinna.

Re: Overview of a Handle

Paresh Chitte13-Mar-07 18:45

Paresh Chitte

13-Mar-07 18:45

A number assigned to a window that is used by the operating system to keep track of the attributes of the window. In a C or C++ library, a handle is a pointer.

For more information please go through the MSDN.

Regards,

Paresh.

Re: Overview of a Handle

Stephen Hewitt13-Mar-07 20:45

Stephen Hewitt

13-Mar-07 20:45

I could be many things. It could be one thing in one OS version and an entirely different beast in another OS version. Possible implementations are indexes into arrays, keys into hash tables, a pointer to a data structure… The important thing is that all operations go through APIs so the OS is free to change the implementation and the code will still run without needing to be altered; as long as the size of the HANDLE doesn't change.

Steve

Re: Overview of a Handle

ThatsAlok15-Mar-07 1:17

ThatsAlok

15-Mar-07 1:17

Kotesh.N wrote:
Is there an specific structure

you can see it as memeory location!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

help me about ctrl+c&v on edit box

zhaohaicheng13-Mar-07 17:47

zhaohaicheng

13-Mar-07 17:47

when i import a dialog from dll, i can't paste sth to the editbox on the dialog with ctrl+v,how can i make it!!

help me!!!

strin find

deeps_cute13-Mar-07 17:45

deeps_cute

13-Mar-07 17:45

how to find a specified string in file and how to delete a line which have a that string.(with ignore case )

Arise Awake Stop Not Till ur Goal is Reached.

Re: strin find

Hamid_RT13-Mar-07 18:12

Hamid_RT

13-Mar-07 18:12

See CleanR - text file string search and replace engine. [^]

WhiteSky

Error in Network based application

Vichitram13-Mar-07 17:40

Vichitram

13-Mar-07 17:40

Hi,

I have a Win32 Console Application. I am using VC 6.0

My program is a TCP based Client Server Aplication. In the Server part, I have a variable defined for SOCKADDR_IN.

SOCKADDR_IN saServer;

LPHOSTENT lpHostEntry = gethostbyname(clientIP);

saServer1.sin_family = AF_INET;
saServer1.sin_addr = *((LPIN_ADDR)*lpHostEntry->h_addr_list);
saServer1.sin_port = htons(3500);

Then, when I am running the program, binding error occurs. This is when I am trying with the server and client programs in different machines. But in the localhost, it is working.

But, if I am trying it with address set to INADDR_ANY, it is working(both in the localhost and with different machines).

saServer1.sin_addr.s_addr = INADDR_ANY ;

Why does this happen? Actually I am confused. Is there any problem with binding a socket to a port with a known address or what is the difference between the two scenarios?.

Please can anyone help me?

Re: Error in Network based application

Mark Salsbery14-Mar-07 6:53

Mark Salsbery

14-Mar-07 6:53

Vichitram wrote:
Is there any problem with binding a socket to a port with a known address

No, as long as you know the correct address to bind to.

Generally you only need to know the address to connect to. INADDR_ANY is generally fine for the
bind address unless you need to bind to a certain NIC.

Is the code you posted initializing a local address or a remote address?

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

System!!!

Tran Ngoc Minh13-Mar-07 17:29

Tran Ngoc Minh

13-Mar-07 17:29

Thank you very much ,WhiteSky ! But can i set a picture to Desktop by Api function ? Please help me !
Regards and thank !

Re: System!!!

Hamid_RT13-Mar-07 18:16

Hamid_RT

13-Mar-07 18:16

I forgot address of wallpeper on the registry but see WallpaperQ: A Wallpaper Management Tool[^] Wink | ;)

WhiteSky

OnLButtonDown

Aint13-Mar-07 16:45

Aint

13-Mar-07 16:45

Hello.

I am trying to get the coordinates of the clicked point inside a picture control on a dialog. For the picture control, I have derived my own class based on CStatic. And I have set the picture control style to Notify. I have created OnLButtonDown method in the Dlg.
The problem is when I clicked on the picture, the coordinates are not passed down but when I clicked on other part of the dialog, the coordinates are passed down.
Can anyone help me in this? I want to get the coordinates of the picture.

Re: OnLButtonDown

Hamid_RT13-Mar-07 18:14

Hamid_RT

13-Mar-07 18:14

Where do you use of GetCursorPos on your program for get position?

WhiteSky

Re: OnLButtonDown

Aint13-Mar-07 18:37

Aint

13-Mar-07 18:37

When I use GetCursorPos in the dlg in the OnPicture method, i can get the coordinates. But it is the coordinates of the dialog, not the coordinates of the picture. And also i want to get the coordinates when the left button is down and when the left button is up. How do i go abt in doing this?

Re: OnLButtonDown

Parthi_Appu13-Mar-07 19:10

Parthi_Appu

13-Mar-07 19:10

ReturnRain wrote:
When I use GetCursorPos in the dlg in the OnPicture method, i can get the coordinates. But it is the coordinates of the dialog, not the coordinates of the picture

GetCursorPos() will return the x,y points with respect to screen coordinates.
Change those to clinet coordinates. say, m_wndMyStatic is your derived static class variable,then

POINT pt = {0};
GetCursorPos( &pt );
m_wndMyStatic.ScreenToClient( &pt );

ReturnRain wrote:
And also i want to get the coordinates when the left button is down and when the left button is up. How do i go abt in doing this

Handle WM_LBUTTONDOWN and WM_LBUTTONUP and do the above. You can get the rect..

Hope this will help

Do your Duty and Don't expect the Result

Re: OnLButtonDown

Aint13-Mar-07 20:06

Aint

13-Mar-07 20:06

Thanks! I can get the first part right. But Im confused with the WM_LBUTTONDOWN and WM_LBUTTONUP. Since i want the picture coordinates when the button is down, should i put the codes in OnLButtonDown or OnPicture (picture control)? And just to make sure, OnLButtonDown and OnLButtonUp is in the dlg?

Re: OnLButtonDown

Hamid_RT13-Mar-07 20:23

Hamid_RT

13-Mar-07 20:23

You must get position on the picture class (if you derived a CStatic class)

WhiteSky

Re: OnLButtonDown

William.Wang13-Mar-07 19:21

William.Wang

13-Mar-07 19:21

Your picture control is a seperate child window to the dialog, so mouse click message is generated and sent to static window, then the static window send WM_NOTIFY message to the parent dialog window, when ur mouse clicks on static control rather than clicking on dialog window. I recommand u to handle this by overwrite CStatic::OnLButtonDown or handle it by CYourDialog::OnNotify. hope this could help u out.

life is like a box of chocolate,you never know what you r going to get.

AlphaBlend() strange colors.

PatrykDabrowski13-Mar-07 13:05

PatrykDabrowski

13-Mar-07 13:05

Hello

I have a gradient-like background with an owner drawn button. I use AlphaBlend() to draw button's image. Now, the strange thing is:

Background pixel = RGB(168,168,168)
Source pixel = 0xFFFF0000 (AARRGGBB)

After AlphaBlend() with SourceConstantAlpha=0xff the output is RGB(255,0,0) - that's correct but when I change a bit the source pixel to

Source pixel = 0x00FF0000 (AARRGGBB)

I receive pixel RGB(255,168,168)?!?! I should get RGB(168,168,168) because the source alpha is 0x00?!?!?

After some tests with different RGB values, I noticed that my blending works like it 'thinks' that my background is white (255,255,255)?!? When I make all source pixels to have 0xFF alpha value and just play with SourceConstantAlpha value, it's working fine!?! - my button is drawn with proper transparency?!?
I need to play a bit with the source pixels' alpha value for 'soft' button's border.

Does anyone know what could be wrong?? I'm using winxp/vs2003

Thanks a lot!!

Re: AlphaBlend() strange colors.

Mark Salsbery13-Mar-07 16:04

Mark Salsbery

13-Mar-07 16:04

AlphaBlend() from which class?

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

Re: AlphaBlend() strange colors.

PatrykDabrowski20-Mar-07 2:01

PatrykDabrowski

20-Mar-07 2:01

Sorry, I couldn't reply as I was offline for couple of days. I was trying CDC::AlphaBlend(), CImage::AlphaBlend() and global ::AlphaBlend() with the same results.

I discovered that I should premultiply r/g/b values by alpha channel. Now it works fine, but I wonder how to cope with the situation when You have very small r/g/b values and small alpha channel. When You premultiply those small values and divide by 255, You will get zeroes...Now if You want to recover almost transparent pixels by increasing their alpha value, You will get black color instead of original one?!?!?

Am I correct??

Simple example:

Source bitmap: ARGB(10,20,0,0) ; DARK RED
After premultiply: ARGB(10,20*10/255,0,0) = ARGB(10,0,0,0); BLACK

Now try to recover original color by increasing alpha
ARGB(255,0,0,0) and You receive black instead of ARGB(255,20,0,0);

Thanks for Your attention.

Re: AlphaBlend() strange colors.

Mark Salsbery20-Mar-07 7:45

Mark Salsbery

20-Mar-07 7:45

Since you're essentially dividing pixel RGB values by 25.5 then yes, any values less than 25 are
going to end up being 0.

There's still something strange - I'm going to try your original code so I can see it.

I'll be back.

Mark

"Great job, team. Head back to base for debriefing and cocktails."
(Spottswoode "Team America")

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