|
please please help me in this i would be greatful to you. Just reply to my mesaage leaving ur email address and i will send you the c source code which will be used in here. please help me. i am requesting you.
You are to write two classes, screen and field, representing a screen
layout and an individual field (either a label or an input region) that
appears on a screen.
The field class, which lets us display, and possibly edit, a character
string, is really intended as a base class from which we'll derive many
kinds of field (displaying/editing different kinds of data) in the
future. Because of this, and because the code for the screen class will
use the field class extensively, it is important that the screen class'
logic uses only features of the field class described below and not
extra features you may decide to add to the field class.
When instantiated a field must be passed between three and five values,
in the following order:
- required: the row on which the field is to be displayed (int)
- required: the starting column for the field (int)
- required: the field's width (int)
- optional: an initial value for the field (constant character string)
- optional: editability flag (true: editable, false: display-only)
If only three parameters are specified, the field begins empty. If fewer
than five parameters are specified, the field is editable. Note that
instantiating a field does not cause it to appear - there are member
functions (below) to do that. If the coordinates specified are not
valid, the closest on-screen coordinates to those specified are used. If
the field width is too long to fit on the screen, the width should be
reduced so that the field fits on the screen. Similarly, if the initial
value is longer than the field width, only as many characters of the
initial value as will fit are used.
A field has the following public member functions, all of which are
virtual:
void display() - causes the field to be displayed on the screen. On
systems where terminal output is buffered, this function does
not flush the screen buffer. Note that if the field's current
value is shorter than the field width, trailing spaces are
displayed to fill out the field. (Such trailing spaces are not
considered part of the data of the field, however).
int edit() - causes the field to be displayed (as in display()) and
then lets the user edit the field, using the keys just as
dt_edit() does. The key code used to terminate editing is
returned. The first time a field's edit() function is called,
the cursor is positioned at the beginning of the field.
Subsequent calls to edit() start the cursor where it left off at
the end of the previous edit() call, unless the string is now
too small (in which case the cursor is positioned just past the
end of the string).
In the case where the field is not editable, this function
simply displays the field and returns 0 without waiting for any
keystrokes.
bool editable() const - returns true if the field is editable, false
if it is display-only.
void *data() - returns the address of the string currently stored by
the field. Note that we expect that in derived classes this may
be the address of some other kind of data being edited.
field *clone() const - dynamically allocates another instance of the
field, making that field a copy of itself, and returns the
address of the copy. If a copy cannot be made, this function
returns NULL. It is the caller's responsibility to deallocate
the copy.
Since dynamic memory allocation is required to implement this properly,
the field class also has an appropriate copy constructor, = operator and
virtual destructor.
A screen manages up to 50 fields (although if you can remove this limit,
you are more than welcomed to do so). The fields are kept in order by
when they were added to the screen - the field that was added first is
known as field number 0, the field that was added next is known as field
number 1 and so on. The screen class has the following public member
functions:
int add(int, int, int) and
int add(int, int, int, const char *) and
int add(int, int, int, const char *, bool) - adds a field to the
screen, where the field added is constructed with the data
supplied to add(). These functions return the number of fields
in the screen after adding the field, or 0 if the field could
not be added for some reason.
int add(const field &f) - adds a copy of "f" to the screen,
returning the number of fields in the screen after adding the
field (or 0 if the add() failed for some reason).
void display() and
void display(bool clear) - displays all the fields managed by the
screen, in the same order that they were added to the screen. If
"clear" is specified and true, the screen is cleared before the
fields are displayed, otherwise the fields are displayed without
touching any other part of the screen. On systems that buffer
terminal output, this function does not flush the output buffer.
int edit() and
int edit(bool clear) and
int edit(int *pfield) and
int edit(int *pfield, bool clear) - Displays all the fields of the
screen (after clearing the screen if "clear" is specified and
true) and then allows the user to edit them, starting at field
number "*pfield". The user moves between fields with any of the
following keys:
Down arrow - moves to the next editable field
Up arrow - moves to the previous editable field
Tab - works just like Down Arrow
Enter - moves to the next editable field, except when pressed
in the last editable field of the screen, in which case it
causes edit() to end.
Here "next" and "previous" refer to the order in which the
fields were added to the screen. There is a wrap-around effect,
also, so the the next field after the last field is the first
field, and the previous field before the first field is the last
field.
All other keys which terminate a field's edit() function
terminate this function as well, setting "*pfield" to the number
of the field from which the user exited. The key code used to
exit the field's edit() is returned.
If "pfield" is NULL or not provided, then editing starts at the
first editable field the first time edit() is called, and
resumes at the field last exited upon subsequent calls.
If "pfield" points to an int, but that int is not the number of
en editable field, then editing begins at the next editable
field (where "next" is as defined above).
If there are no editable fields on the screen, this function
returns 0 after displaying all the fields.
field *getfield(int i) - returns the address of field numbered "i"
or NULL if "i" is not the number of a field.
int remove(int i) - removes field number "i" from the list of fields
being managed by the screen, and returns the number of fields
left on the screen after removal. If "i" is not the number of a
field, then nothing happens and the current field count is
returned.
Note that removing a field renumbers the remaining fields.
Also, the += operator can be used, with a screen on the left and a field
on the right, to add a field to a screen, returning a reference to the
screen.
Note that creating a screen, adding a field to a screen, or removing a
field from a screen causes no immediate visual effect. It is when the
screen is display()ed or edit()ed that the user sees anything.
Note also that since adding a field involves copying the field, and
since we plan to derive new types of field in the future, you must make
the copies of fields by using clone(), rather than by relying on the
copy constructor.
Since this means that your screen must use dynamic memory allocation
(clone() dynamically allocates a copy), you should be sure to code an
appropriate copy constructor, = operator and virtual destructor for the
screen class.
Both the screen class and the field class should be declared in a header
file screen.h, and coded in a source file screen.cpp. Including screen.h
should also make the dtio functions available for use.
|
|
|
|
|
http://www.codeproject.com/dialog/xgui-extension.asp[^]
Just curious ( neato, when I pasted the link it automatically generated a clikety, how cool  )
The gradient to the left...how is that generated???
I've noticed that the top left (in photoshop) is always white and the bottom right is always black, the top right is what appears to be the color which is selected in the skinny vertical color picker region.
Is that big color gradient just a normal gradient painted at a 45 degree angle???
Hope I make sense... 
Cheers
How do I print my voice mail?
|
|
|
|
|
Hockey wrote:
The gradient to the left...how is that generated???
Like this...
Assume:
x = 0 to Xmax (starting at left-hand side)
y = 0 to Ymax (starting at top side)
Rc = Red value of the top-right corner
Gc = Green value of the top-right corner
Bc = Blue value of the top-right corner
R(x,y) = (Rc + (255 - Rc) * (Xmax - x) / Xmax) * (Ymax - y) / Ymax
G(x,y) = (Gc + (255 - Gc) * (Xmax - x) / Xmax) * (Ymax - y) / Ymax
B(x,y) = (Bc + (255 - Bc) * (Xmax - x) / Xmax) * (Ymax - y) / Ymax
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
|
|
|
|
|
I do believe that is what I wanted
Thanks a bunch
How do I print my voice mail?
|
|
|
|
|
i need to create a resource that will spell check in my local from microsoft word not a standalone.
does anybody have ideas as i am relatively new to c++. ese pupo! = thanks so much!
larry_larry
|
|
|
|
|
Lanre Ogunkola wrote:
...spell check in my local from microsoft word...
What does this mean?
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
|
|
|
|
|
I already wrote a dll in vb that allows typing in my local langauge with is own fonts.
I need to write a .lex file that would support our language contents. ms word uses this file as its language support in proofing tools.
Also i presume i might need to also generate localised dictionary.
thanks
larry_larry
|
|
|
|
|
I am looking for a small example of a server/client program that lets more then 1 client connect to a server. (like a simple chat program) The client uses a file to get the IP of the server.
Thanks
|
|
|
|
|
wait here are your links
http://www.codeproject.com/internet/server_client_sockets.asp
-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
|
|
|
|
|
Do I just run that code in Visual C++? What type of project? I tryed running it in a c++ "Win32 Console Project" and I get errors... ?
|
|
|
|
|
Give me the error it is giving,have you included ws2_32.lib in your project (that the library file for windows socket)
-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
|
|
|
|
|
I just tryed to compile as is... I did not change any thing..
Server error LNK2005: "void __cdecl socketError(char *)" (?socketError@@YAXPAD@Z) already defined in server_part1.obj
Server error LNK2005: _main already defined in server_part2.obj
Server error LNK2005: "void __cdecl socketError(char *)" (?socketError@@YAXPAD@Z) already defined in server_part1.obj
Server fatal error LNK1169: one or more multiply defined symbols found
|
|
|
|
|
 Hi all out there... i have a little problem with using DirecShow..
i got errors like the those shown below.. is there any1 who know how to debug it?
KNN error LNK2001: unresolved external symbol _CLSID_AudioCompressorCategory
KNN error LNK2001: unresolved external symbol _CLSID_FileWriter
KNN error LNK2001: unresolved external symbol _CLSID_FilterGraph
KNN error LNK2001: unresolved external symbol _CLSID_SystemDeviceEnum
KNN error LNK2001: unresolved external symbol _IID_IAMStreamConfig
KNN error LNK2001: unresolved external symbol _IID_IBaseFilter
KNN error LNK2001: unresolved external symbol _IID_ICreateDevEnum
KNN error LNK2001: unresolved external symbol _IID_IFileSinkFilter
KNN error LNK2001: unresolved external symbol _IID_IGraphBuilder
KNN error LNK2001: unresolved external symbol _IID_IMediaControl
KNN error LNK2001: unresolved external symbol _IID_IMediaEvent
The document from DirectShow says that Strmiids.lib are used to exports class identifiers (CLSIDs) and interface identifiers (IIDs). All DirectShow applications require this library. So i am wondering whether did i link this lib to my project. Is including <dshow.h> just enough? But y am i still having the same errors???
TKS
|
|
|
|
|
Hi all,
I have written a program in normal cpp source file. In tht I am generating data of size 256x256 values. I want to plot them on a 3D surface plot i.e x(0,100), y(0,100), z is the corresponding values of (x,y) which is being generated int he program. For this values I have to plot a 3D surface plot thru my program. How can i implement it?
anykind of help is needed and is appreciated. Lemme know if u know any kind of already built functions or libraries which can do this just by giving data thru my program.
thanks in advance,
Suman
|
|
|
|
|
hi,
I want the list control to be able to have images in differnt columns( could be any column 0,1,2..) so i create a CIMAGELIST from some resource and also set it for the list control by calling the method
m_listCtrl->SetImageList(&m_imagelistsmall, LVSIL_SMALL);
What this does is set the images from the imagelist in column1( always). even when i dont specify the LVIF_IMAGE mask when adding item.
I dont want the image in the first column. Also what do i do to have the image in other other columns
|
|
|
|
|
You can't do this with a Windows list control - it can only display icons in the first (left-most) column. You'll need a custom control to do what you want. A grid control that lets you put images in any cell might be the thing. Take a look at this control[^], here on CP.
The chap who developed it is also a dab hand at web sites...
|
|
|
|
|
Thanks.
I made some of it possible and here is how i achieved it. I have an extended class of list ctrl. when i set the imagelist for the list it shows in the left most column by default so what i do is i do set the image in LVITEM but specify it to be some thing outside the range in the bitmap say 2000. This prevents the images to be shown in the left most column. Also for showing the image in some other column i use the LVS_EX_SUBITEMIMAGES extended style.
|
|
|
|
|
That's how the control works - you always get an image in column 0 when you set an image list.
To put images in other columns, set the LVS_EX_SUBITEMIMAGES extended style. Then when you insert new items, the control will look at the iImage field in the LVITEM and show the corresponding image.
--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
----
|
|
|
|
|
A basic roulette game. I need to make on basic roulette game. Im trying to help out a friend and dont know how to code at all really. My question is is there any templete or anything to make a completely text baed roulette game consisting of 10 numbers and it returning a prize a for number 1 through 5.
|
|
|
|
|
Tell your friend to do his own homework, and to ask people who know how to code if he gets stuck.
Christian
I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer
|
|
|
|
|
Heh. Two for the price of one. 
--
Wir müssen leben bis wir sterben.
|
|
|
|
|
Helping a friend is good, helping a friend to do his homework is bad. If you care for him, don`t help.
<italic>Work hard and a bit of luck is the key to success. 
You don`t need to be genius, to be rich.
|
|
|
|
|
wlll its basically he dosent have the net to post for help on a message board so were trying to figure it out using a templete.
|
|
|
|
|
I'm trying to find out if there's a way that I can format a number with commas using sprintf() or CString::Format(). I know there's a way I can do it by parsing the string, but I thought there should be some type of format flag for this, but I can't seem to find it. So, returning a float, I'm getting this:
100209.00
but I want
100,209.00
thanks in advance
[insert witty comment here]
bdiamond 
|
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
