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Thank Alton Williams. That's right.
Thank everybody
Hello
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Hello All,
I have a Subclassed CListCtrl. I am using a bitmap as my custom scrollbar over the orignial scollbar. I understand that the scrollbar used in CListCtrl is not a window control in true sense.
Is there a way to stop the MFC, painting the original scroll bar. i.e in cases like when I drag the header control, the original scroll bar should not get displayed. Currently my own scrollbar (implemented as bitmap) is getting displayed over the original scrollbar (brown colour) and this is giving a flickering effect. Hiding the scrollbar is not a solution for me and I have tried that. I cannot use the ModifyStyle function to hide nor use the Flat Scrollbar concept.
Is it possible to intercept the SBM_SETRANGEREDRAW message, which I think is used everytime to draw the orginal scrollbar. Am I correct? How can I intercept this message. I tried overloading WindowProc but of no help.
I don't want the orignial scrollbar to get displayed in other cases too. Like draggging the thumb etc...
Though I have reduced the thumb flickering to a large extent. Some amount of flickering is still there. I want to avoid this too by stopping the painting of original MFC scrollbar. Any idea please.
Thanks
Rajdeep
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I'll chip in after about 6 months of feddling with scroll-bars in the background of my work.
Up to and including Windows-2000:
You can eliminate window's scroll-bars by simple overriding OnNcCalcSize and OnNcPaint. You can either have OnNcCalcSize return no Non-Client area and bham, no scroll-bar (that's because scroll-bars are not autonomous windows, they are siply drawn in the window's Non-Client area).
You can also return some non-client area and your OnNcPaint can paint your scroll-bar there, or just override OnNcPaint and don't do anything there, that way you can have a non-client area and STILL have windows not draw it's scroll-bars (remember, in these versions of windows, the scroll-bars are drawn by OnNcPaint).
Windows-XP:
This version of windows introduces a new problem. The minute you have a non-client area, windows will manage to throw it's scroll-bars in there. No matter if you disabled them using the Flat-ScrollBar API, or even overrided OnNcPaint, it will draw them, I suspect it does it in the common-control's OnScroll.
I hope this gave you good enough information.
My final approach for this all was to have my scrollbar as an independant window right next to my scrollable-control. The control itself had no non-client area (so that window's XP won't draw it's own scroll-bar there), and I tied everything up nicely...
Hope this helped... 
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Hello,
I am not exactly able to figure out how do I make CListCtrl::OnNcCalcSize() return a no Non-Client area information. Basically I need to have a CListCtrl created with no Non Client area. So that the system doesn't draw it's own scroll-bar there - in win xp.
Any suggestions or a small code snippet will be of great help in this regard.
Thanks
Rajdeep
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Simply override CListCtrl's OnNcCalcSize and make your implementation return immediately.
Notice that this will also remove any border your list may have had using the default implementation of OnNcCalcSize...
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I have two windows, let's call them Frame and List.
They are both laid on a dialog, both are direct children of this dialog.
List stands in the middle of the dialog, frame does too only that it's slightly larger than the list, just enough to add a frame around the list.
The thing is, when resized (together ofcourse) the list flickers.
Removing the list's OnEraseBkgnd eliminates the flicker, but also eliminates the list's background
Note that the frame only draws AROUND the list, i specifically don't draw anything where the list is positioned so that I won't cause flickering. I have an empty OnEraseBkgnd that returns TRUE.
Can someone assist ?
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ohadp wrote:
I have an empty OnEraseBkgnd that returns TRUE.
why don't you draw the background urself and return TRUE
get the system color for window and draw away
i can't even remember what my point is now, but anyway, i'm correct
Barring unforeseen acts of God and Adminstrators, my server will be up tomorrow. I'm more worried about the Adminstrators.
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The Frame doesn't need to erase it's background (because it omstly contains the list),
so that's why it has an empty implementation of OnEraseBkgnd.
The List on the other hand does need a background, and in the List's OnEraseBkgnd I do clean the background and return TRUE.
My problem is that this causes the list to flicker.
The List didn't flicker when there was no frame around/over it...
My question is how to eliminate the flicker, or more importantly why did it start flickering now ? when I didn't have my Frame the List cleaned it's background and nothing flickered....
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I can't say I've made sure all the windows (including the dialog) have this style, but I have tried to give the Frame itself the WS_CLIPSIBLINGS style, and give the list the container of these two windows (the dialog), the WS_CLIPCHILDREN style, but not all of them together...
Can you explain why this will work ? Will it provide the list with a different clipping-region when it gets to 'OnEraseBkgnd' ?
thanks
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I've applied the WS_CLIPCHILDREN style to all apropriate windows, but my List continuse to flicker when I don't override it's OnEraseBkgnd, any idea ?
thanks
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There was anoher overlapping window lacking the WS_CLIPSIBLINGS style.
Thanks for WS_CLIPSIBLINGS
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hi
i am working on java tutorial and using microsoft visual c++ to develop it
i also want to built a code editor in it that will execute java programes
but i m facing a problem that is how to link java compiler in visual c++
so if u have any suggesion please let me know
i will be thankfull for this act of kindness
bye
imran
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You know you can add tools to the visual studio interface
To do that go to Tools->Customize->Tools
Add a line there and in the commad u can specify a command line or even a batch file
I used it like this
Command : comp.bat
Arguments : $(FileName) -debug -compall
Initial directory : $(FileDir)
And in the comp.bat i have my compiling and linking commands
What is good that you can do a keyboard mapping
To do that go to Tools->Customize->Keyboard
and add an entry to you tool by selecting the category Tools and selecting your added tool
Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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When I try to place Ms FlexGrif control
(MSFlexGridCtrl - :\WINNT\system32\msflxgrd.ocx)
to dialog template,
it says:
MS FlexGrid Ctrl - no "disign time licence" ?
what does it means ?
Not correctly installed Visual studio?
Thanks
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Yes, I think you need to reinstall Visual Studio to fix this problem.
Stability. What an interesting concept. -- Chris Maunder
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I made command "repair/reinstall" in setup dialog.
reloaded OS - and this is not works to differ from other controls.
Do you have same named licence file ?
Can send to me?
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How would I tally the individual letters(upper and lower treated as one) and print out in descending order?
Output example:
Letter Z or z occurs 5 times
Letter B or b occurs 34 times
Also, how to calculate the ratio of that lower-case letter to the total count of that letter (upper case plus lower case)?
eg. b has 30 times, B has 4 times.
I would need to
Ratio = 30 / (30+4)
What code can I capture the individual letter count without hard coding?
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use a map container...
TOXCCT >>> GEII power
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Something like this:
struct SLetter
{
int iUpperCount;
int iLowerCount;
};
struct SAlphabet
{
SLetter m_Letters[26];
};
SAlphabet alphabet = {0};
char text[1024];
for (int i=0;i<length;i++)
{
int iIndex = 0;
int bLower = islower( text[i] );
if(bLower)
{
iIndex = text[i] -'a' ;// give the zero based index of the letter
alphabet.m_Letters[iIndex].iLowerCount ++;
}
else
{
iIndex = text[i] -'A' ; // give the zero based index of the letter
alphabet.m_Letters[iIndex].iUpperCount ++;
}
}
Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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a map does this...
each letter is referenced once, and there is only the existing letters into it... (if there is no 't' in the text for example, why allocating space for it ?). better, if you don't use the same alphabet as our ??? will your 26-values array be efficient ?
more, a map associate to each letter (the keys), a value, which is here the ratios...
just define a map<char, int>
TOXCCT >>> GEII power
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It was intended as an alternative, i never said its the best solution 
Papa
while (TRUE)
Papa.WillLove ( Bebe ) ;
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Thanks tp both coaches. Those two topics are new to me. I will read into structures and mapping. Will ask you guys more later.
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Hi Papa:
can I call an input file(from a: drive) into an array? How?
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Hi all..
How can i hide a scroll bar.Iam using a form based application.
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