Re: hoow to owner draw controls? - C / C++ / MFC Discussion Boards

Eugene Pustovoyt23-Apr-02 6:18

23-Apr-02 6:18

I have created the control derivative from CEdit.
Inside him, from the right side, it is necessary for me to arrange CScrollBar.

I have two questions:

1. How correctly to choose ID for him?
2. Where correctly to create CScrollBar (standard scrolling does not approach, because it is necessary for me to create CScrollBar smaller length than height of the control)?

Excuse, if my questions will seem children's

Best regards,
Eugene Pustovoyt

Eugene Pustovoyt

Sonork ID 100.10002:Yaumen

Re: Create CScrollBar into the CEdit

Roger Allen23-Apr-02 6:42

Roger Allen

23-Apr-02 6:42

1. Any non 0 value should be OK. You will be creating the scrollbar as a child of the edit control, so it will not be clashing with anything else unless your CEdit derived class has a lot of child windows.

2. You can create the scroll bar in the OnCreate of your CEdit controls derived class. Call the base class first then create the scroll bar. You will also need to override the OnSize() to correctly possition the scrollbar in the CEdit's client area. Don't forget to check that the window is valid before calling MoveWindow on it.

Roger Allen
Sonork 100.10016

yet to be identified being from the planet Paltinmoriumbanfrettybooter

Re: Create CScrollBar into the CEdit

Eugene Pustovoyt23-Apr-02 9:18

Eugene Pustovoyt

23-Apr-02 9:18

I tried to use OnCreate, but at use SubclassDlgItem() I do not get in OnCreate.
Therefore I have decided to create scroll bar in a PreSubclassWindow () method.
But there is one problem!!! I do not know exact height and a position scrollbar yet I shall not start draws the control in OnPaint. How to be in this case?

Best regards,
Eugene Pustovoyt

Sonork ID 100.10002:Yaumen

Re: Create CScrollBar into the CEdit

Roger Allen23-Apr-02 21:38

Roger Allen

23-Apr-02 21:38

Ahh, that makes it more clear. Because you are sub-classing the item, this happens in a dialog OnInitDialog function. I would write a public function as part of the class to create the scrollbar. Something like this:

bool CMyEdit::CreateScrollBar()
{
CRect rect ;
GetClientRect(&rect) ;
// modify the rect area for your scrollbar here
// m_ScrollBar is a member var of type CScrollBar
if (!m_ScrollBar.Create(WS_CHILD | WS_VISIBLE | SBS_HORZ, rect, this, 1))
{
TRACE("Failed to create scroll bar\n") ;
return false ;
}
return true ;
}

You would then call this in the OnINitDialog after the control has been sub-classed.

Roger Allen
Sonork 100.10016

yet to be identified being from the planet Paltinmoriumbanfrettybooter

Re: Create CScrollBar into the CEdit

Eugene Pustovoyt24-Apr-02 7:58

Eugene Pustovoyt

24-Apr-02 7:58

Thank for the help!!!
Now I create CScrollBar<code> in <code>PreSubclassWindow()

pVScroll.Create(WS_CHILD | WS_VISIBLE | SBS_VERT | SBS_RIGHTALIGN, CRect (0, 0, 100, 100), this, 100);

And then in function OnPaint() when becomes the sizes scrollbar are known, I do the following

//Redraws the scrollbar
pVScroll.MoveWindow(rect);

As far as I do correctly all?

Best regards,

Eugene Pustovoyt

Sonork ID 100.10002:Yaumen

Re: Create CScrollBar into the CEdit

Ravi Bhavnani24-Apr-02 8:06

Ravi Bhavnani

24-Apr-02 8:06

It's better to move (resize) the scrollbar when your edit control gets a WM_SIZE, not WM_PAINT. A WM_PAINT handler should be as fast as possible.

/ravi

"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com

hoow to owner draw controls?

DiegoValdevino23-Apr-02 5:36

DiegoValdevino

23-Apr-02 5:36

I need to do some owner draw/ custom controls, and i dont have a clue

Re: hoow to owner draw controls?

Mazdak23-Apr-02 5:40

Mazdak

23-Apr-02 5:40

What king of control do you want? There are lots of sample in codeproject.

Mazy

"The path you tread is narrow and the drop is shear and very high,
The ravens all are watching from a vantage point near by,
Apprehension creeping like a choo-train uo your spine,
Will the tightrope reach the end;will the final cuplet rhyme?"Cymbaline-Pink Floyd

Re: hoow to owner draw controls?

Thomas Freudenberg23-Apr-02 5:55

Thomas Freudenberg

23-Apr-02 5:55

You may have a look at Chris' Creating Custom Controls or Create your own controls - the art of subclassing.

Regards
Thomas

Finally with Sonork id: 100.10453 Thömmi

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Increment an int value in a char array?

23-Apr-02 5:33

Newbie Question!

I need the integer value in a 'command line char array' to increment with the for loop.

eg
On the first loop the cmdline[]="C:\\myexecutable --getmemory SM 1";
On the second loop the cmdline[]="C:\\myexecutable --getmemory SM 2";
On the third loop the cmdline[]="C:\\myexecutable --getmemory SM 3";
etc, for 10 loops.

I have tried the following

for(int i =1; i<=10; i++)
{
char strInitial[] = "C:\\myexecutable --getmemory SM ";
char cmdline[]=("%s [i]", strInitial);

...//snip
}

But I get the following error:
error C2440: 'initializing' : cannot convert from 'char *' to 'char []'

Or if I remove the ()'s

for(int i =1; i<=10; i++)
{
char strInitial[] = "C:\\myexecutable --getmemory SM ";
char cmdline[]="%s [i]", strInitial;

...//snip
}

Then I get the following error:
error C2040: 'strInitial' : 'char' differs in levels of indirection from 'char [49]'

Please help!
Thanks.

Re: Increment an int value in a char array?

Tim Smith23-Apr-02 5:55

Tim Smith

23-Apr-02 5:55

Try this

char szBuffer [256];
sprintf (szBuffer, "C:\\myexecutable --getmemory SM %i", i);

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Re: Increment an int value in a char array?

23-Apr-02 7:10

Works great, Thanks a million!

User defined Message

act_x23-Apr-02 5:19

act_x

23-Apr-02 5:19

hi ,

My application's architecture is as follows :

CMainFrm-->CMDIChildFrame-->CDialog

The MainFrame has instances of the MDIChildFrame . The child Frames display a Dialog . I need to pass a message from the Dialog to the MainFrame. What is the exact way to send a notification from the Dialog and write ,register a handler in my mainframe .

Please help
Confused | :confused:

Transparent windows.

23-Apr-02 5:11

how could i make a window transparent for win32 not MFC Smile | :)

ta, any help will be greatful. Poke tongue | ;-P

Re: Transparent windows.

Paul M Watt23-Apr-02 5:20

Paul M Watt

23-Apr-02 5:20

You can set the WS_EX_TRANSPARENT ex_style, but this will only work for Windows2000 and above. You can also use SetWindowRgn to make your window appear that it has holes in it.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Transparent windows.

23-Apr-02 5:27

any better ways to make the whole window 50% transparent Smile | :)

Re: Transparent windows.

Albert Pascual23-Apr-02 7:43

Albert Pascual

23-Apr-02 7:43

You may find a wonderful article from MAK Jeelani about transparent windows at:
http://www.codeproject.com/csharp/transparentwindowsincsharp.asp

It's in C# but if you writing MC++ is easy to follow!

Otherwise try this article from Franz Brunner:
http://www.codeproject.com/useritems/pellucid.asp

Hope this helps
Al

ODBC - Microsoft SQL server

Wizard_0123-Apr-02 5:10

Wizard_01

23-Apr-02 5:10

Hi,

What means this :
Optional feature not implemented
State:S1C00,Native Blush | :O

,Origin:[Microsoft][ODBC SQL Server Driver]
???? Is this any error ??
....
m_rec->Open(AFX_DB_USE_DEFAULT_TYPE,Sql.GetBuffer(0));
....

For connection to SQL server Iam using CDatabase+CRecordset

Thanks.
Roll eyes | :rolleyes:

Wiizi

Re: ODBC - Microsoft SQL server

Renjith Ramachandran23-Apr-02 7:31

Renjith Ramachandran

23-Apr-02 7:31

For the Successfull conection with the ODBC
You must
1)Create a CDatabase object
2)Connect the database with the ConnectionString inm the Format DSN;Username;password
3)Create a Recordset object
4)set the m_pDatabase member to the address of the database object
5)Open the Recordset with the Query

Follow the Steps ..
Good Luck..
try it now..
any doubts..??

Blush | :O

Hai Friends me from Pandalam..and i think there is a sofware behind everything...
so enjoy with the codes...

Re: ODBC - Microsoft SQL server

Wizard_0123-Apr-02 7:54

Wizard_01

23-Apr-02 7:54

Yes, I do it as you write ... Member function CRecordset::Open retured true -> but in debug window is :
Optional feature not implemented
State:S1C00,Native Blush | :O

,Origin:[Microsoft][ODBC SQL Server Driver]. I dont know if is any error in code or error in SQL server, SQL Server driver ??

Wiizi Smile | :)

Re: ODBC - Microsoft SQL server

Renjith Ramachandran23-Apr-02 17:45

Renjith Ramachandran

23-Apr-02 17:45