C / C++ / MFC Discussion Boards

Re: How create a member variable of type (a class)

toxcct23-Apr-04 2:35

23-Apr-04 2:35

i'm not sure to understand this time. you want to add a CPolyBtn into a Button control ?
is that is right, you have to override the CButton class, an the add the member :

<font style="color:blue;">class</font> CMyButton : <font style="color:blue;">public</font> CButton {
    CPolyBtn m_polybtn;
  <font style="color:blue;">public</font>:
    <font style="color:green;">// Add your functions here...</font>
};

is that correct ?

TOXCCT >>> GEII power

Re: How create a member variable of type (a class)

toxcct23-Apr-04 2:39

toxcct

23-Apr-04 2:39

oh sorry, i start to understand...

<font style="color:blue;">class</font> CPolyBtn: <font style="color:blue;">public</font> CButton {
    <font style="color:green;">/* Type */</font> m_polybtn;
  <font style="color:blue;">public</font>:
    <font style="color:green;">// Add your functions here...</font>
};

but, what type will be your variable member ?

TOXCCT >>> GEII power

Re: How create a member variable of type (a class)

Alton Williams23-Apr-04 4:39

Alton Williams

23-Apr-04 4:39

I think I understand what you saying to us.
What you want to do.

From the way I construe it is he wants to connect IDC_BUTTON1 with m_polybtn of type CPolyBtn.

There are two ways of doing it.

Is to usethe class wizard in the normal way setting IDC_BUTTON1 of type CButton then going to header (*.h) file and replacing CButton with CPolyButton making sure that you add
#include"PloyButton.h" you also get there by using the menu Edit->Find in files type in m_polybtn

You delete the class wizzard (*.clw) file and start again. adding all the files then when you add a variable the CPolyButton will come up this time

I hope you've understood my English.

I'll e-mail you a sample project with and picture explantion

Alton

Re: How create a member variable of type (a class)

ChuThaiDuong23-Apr-04 15:06

ChuThaiDuong

23-Apr-04 15:06

Thank Alton Williams. That's right.

Thank everybody

Hello

Customizing Scrollbar of clistctrl

rajandpayal23-Apr-04 1:29

rajandpayal

23-Apr-04 1:29

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

Re: Customizing Scrollbar of clistctrl

ohadp23-Apr-04 2:25

ohadp

23-Apr-04 2:25

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... Smile | :)

Re: Customizing Scrollbar of clistctrl

rajandpayal24-Apr-04 3:42

rajandpayal

24-Apr-04 3:42

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

Re: Customizing Scrollbar of clistctrl

ohadp24-Apr-04 19:08

ohadp

24-Apr-04 19:08

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...

Two overlapping windows, one flickers, howto solve ?

ohadp23-Apr-04 1:16

ohadp

23-Apr-04 1:16

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 Smile | :)

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 ?

Re: Two overlapping windows, one flickers, howto solve ?

Monty²23-Apr-04 1:57

Monty²

23-Apr-04 1:57

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.

Re: Two overlapping windows, one flickers, howto solve ?

ohadp23-Apr-04 2:10

ohadp

23-Apr-04 2:10

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....

Re: Two overlapping windows, one flickers, howto solve ?

Michael Dunn23-Apr-04 5:20

Michael Dunn

23-Apr-04 5:20

Make sure all your windows (including the dialog itself) have the WS_CLIPCHILDREN style

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
"That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas."
-- Buffy

Re: Two overlapping windows, one flickers, howto solve ?

ohadp23-Apr-04 12:37

ohadp

23-Apr-04 12:37

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

Re: Two overlapping windows, one flickers, howto solve ?

ohadp24-Apr-04 19:37

ohadp

24-Apr-04 19:37

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

SOLVED: Two overlapping windows, one flickers, howto solve ?

ohadp25-Apr-04 2:58

ohadp

25-Apr-04 2:58

There was anoher overlapping window lacking the WS_CLIPSIBLINGS style.

Thanks for WS_CLIPSIBLINGS Smile | :)

linking java in Microsoft visual c++ environment

doctorit23-Apr-04 0:39

doctorit

23-Apr-04 0:39

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

Re: linking java in Microsoft visual c++ environment

jmkhael23-Apr-04 0:57

jmkhael

23-Apr-04 0:57

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 ) ;

Visual studio not find .ocx control licence ?

vgrigor23-Apr-04 0:00

vgrigor

23-Apr-04 0:00

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

Re: Visual studio not find .ocx control licence ?

Mike Dimmick23-Apr-04 1:58

Mike Dimmick

23-Apr-04 1:58

Yes, I think you need to reinstall Visual Studio to fix this problem.

Stability. What an interesting concept. -- Chris Maunder

Re: Visual studio not find .ocx control licence ?

vgrigor23-Apr-04 2:30

vgrigor

23-Apr-04 2:30

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?

How to tally an individual letter from input text

Member 104400122-Apr-04 23:35

Member 1044001

22-Apr-04 23:35

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?

Confused | :confused:

Re: How to tally an individual letter from input text

toxcct23-Apr-04 0:37

toxcct

23-Apr-04 0:37

use a map container...

TOXCCT >>> GEII power

Re: How to tally an individual letter from input text

jmkhael23-Apr-04 0:49

jmkhael

23-Apr-04 0:49

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 ) ;

Re: How to tally an individual letter from input text

toxcct23-Apr-04 1:02

toxcct

23-Apr-04 1:02

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

Re: How to tally an individual letter from input text

jmkhael23-Apr-04 2:04

jmkhael

23-Apr-04 2:04

It was intended as an alternative, i never said its the best solution Wink | ;)

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

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