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Console UI Core Classes - OOP344 20111

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Under Construction!

Release 0.5

Before anything, go to your repository/branches/fardad/bio_additions and open bio.c and bio.h, then copy and apply the additional functions and changes to your own bio.c and bio.h in trunk. Make sure it compiles and runs properly. These changes add buffering support to be able to prevent flickering. The functionalities added will not change the console behavior or the bio functions. After applying the changes, everything should work they way they worked before.

Your objective at this stage is to create series of core classes designed to interact with the user. These Core Classes then can be used in development of any interactive application.

Please note that the class definitions here are minimum requirement for the Core Classes and you are free to add any enhancements or features you find useful. However make sure that you discuss these enhancements with your professor to make sure they are feasible before implementation.

It is highly recommended to develop the classes in the order they are stated here. You must create your won tester programs fore each class (if possible); However, close to due date of each release, a tester program is provided to help you verify the functionality of your classes. Executables of the test programs are available on matrix to show you how it is supposed to run.

Start by creating mock-up classes (class declaration and definition with empty methods that only compiles and don't do anything). Each class MUST have its own header file to hold its declaration and "cpp" file to hold its implementation. To make sure you do not do circular includes follow these simple guidelines:

  • Add recompilation safeguards to all your header files.
  • Always use forward declaration if possible instead of including a class header-file.
  • Use includes only in files in which the actual header file code is used.
  • Avoid "just in case" includes.

Due Dates

Sat March 19 R3.0

  • Merge the bio additions to your bio.c and bio.h
  • Add all the files for mock-up classes
    1. create .h and .cpp files for all classes
      the name of the file is all lower case and is the same as class name (i.e CFrame class: cframe.h and cframe.cpp)
    2. copy the class definitions into .h files
    3. create mock-up methods for the class defs
  • Tag it in Release 0.3

Tue March 22 R3.5

  • merge the code for CFrame and CField from branches\fardad\FrameFieldStrarr into your project and compile, run and test it with Test1Frame.cpp
  • Tag it in Release 0.35

Tue march 29 R4.0

  • Code the following
    1. CDialog
    2. CLabel Tester: Test2DialogAndLabel.cpp
    3. CLineEdit Tester: Test3DialogAndLineEdit.cpp
  • After successful testing, tag them in R4.0

Fri Apr 8 R5.0

  • Code the following
    1. CCheck
    2. CButton
    3. CMenuItem
    4. CValEdit
  • After successful testing, tag them in R5.0

General Internal Header file (cgh.h R0.1)

The general header file holds the common setting and definition between all the Core Classes. 

#ifndef ___CGH_H__
#define ___CGH_H__
 
#ifndef _CRT_SECURE_NO_DEPRECATE
#define _CRT_SECURE_NO_DEPRECATE
#endif
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
 
#define C_MAX_NO_FIELDS 100
#define C_BUTTON_HIT 1
#define C_MAX_LINE_CHARS  (1024u)

#define C_FULL_FRAME -1
#define C_NO_FRAME 0

#define C_BORDER_CHARS  "/-\\|/-\\|"
enum CDirection {bio_centre, bio_left, bio_right, bio_up, bio_down};

extern "C"{
#include "bio.h"
};

enum MessageStatus{ClearMessage,SetMessage};


#ifdef NO_HELPFUNC
# undef NO_HELPFUNC
#endif
#define NO_HELPFUNC ((void(*)(MessageStatus, CDialog&))(0))
#ifdef NO_VALDFUNC
# undef NO_VALDFUNC
#endif
#define NO_VALDFUNC ((bool(*)(const char*, CDialog&))(0))


#define C_MAX_LINE_CHARS  (1024u)
#define C_INITIAL_NUM_OF_LINES (100u)

#endif

File Names

Use the following rules to create filenames for your class.

  • Each class MUST have its own header file and cpp file for implementation
  • Use the class name for the name of the file but make sure it is all lowercase.
    For example CFrame class should have cframe.h and cframe.cpp files for its implementation.

Hierarchy

CFrame
 |
 |---CDialog
 |
 |
 |---CField
       |
       |-------- CLabel
       |
       |
       |-------- CButton
       |
       |
       |-------- CLineEdit
       |         |
       |         |-------CValEdit
       |
       |-------- CText
       |
       |
       |-------- CCheck
       |
       |
       |-------- CCheckList
       |
       |
       |-------- CMenuItem 
       |
       |
       |-------- CMenu

Basic (BIO) Encapsulating Classes

CFrame

The code for this class is provided. You must understand and use it to develop your core classes.

CFrame class is responsible to create a frame or structure in which all user interface classes contain themselves in. It can draw a border around it self or be border-less. CFrame also, before displaying itself on the screen, will save the area it is about to cover, so it can redisplay them to hide itself.

CFrame is base of all objects in our user interface system. 

;
#pragma once
#include "cgh.h"

class CFrame{
  int _row;      // relative row of left top corner to the container frame or the screen if _frame is null
  int _col;      // relative col of left top corner to the container frame or the screen if _frame is null
  int _height;   
  int _width;
  char _border[9];  // border characters
  bool _visible;    // is bordered or not
  CFrame* _frame;   // pointer to the container of the frame (the frame, surrounding this frame)
  char* _covered;   // pointer to the characters of the screen which are covered by this frame, when displayed
  void capture();   // captures and saves the characters in the area covered by this frame when displayed and sets 
                    // _covered to point to it
protected:
  int absRow()const;    
  int absCol()const;    
public:
  CFrame(int Row=-1, int Col=-1, int Width=-1,int Height=-1,
    bool Visible = false,
    const char* Border=C_BORDER_CHARS,
    CFrame* Frame = (CFrame*)0);
  
  virtual void draw(int fn=C_FULL_FRAME);
  virtual void move(CDirection dir);
  virtual void hide();

  virtual ~CFrame();
  
  /* setters and getters: */

  bool fullscreen()const;

  void visible(bool val);
  bool visible()const;

  void frame(CFrame* theContainer);
  CFrame* frame();
  
  void row(int val);
  int row()const;

  void col(int val);
  int col()const;

  void height(int val);
  int height()const;

  void width(int val);
  int width()const;

  void refresh();
};

Properties

int _row, holds the relative coordinate of top row of this border with respect to its container.
int _col, same as _row, but for _col.
int _height, height of the entity.
int _width, width of the entity.
char _border[9], characters used to draw the border:

_border[0], left top
_border[1], top side
_border[2], right top
_border[3], right side
_border[4], right bottom
_border[5], bottom side
_border[6], bottom left
_border[7], left side

bool _visible; Indicates if the border surrounding the entity is to be drawn or not.
CFrame* _frame; holds the container (another CFrame) which has opened this one (owner or container of the current CFrame). _frame will be NULL if this CFrame does not have a container, in which case, it will be full screen and no matter what the values of row, col, width and height are, CFrame will be Full Screen (no border will be drawn)
char* _covered; is a pointer to a character array that hold what was under this frame before being drawn. When the CFrame wants to hides itself, it simple copies the content of this array back on the screen on its own coordinates.

Methods and Constructors

Private Methods

void capture();
if _covered pointer is not pointing to any allocated memory, it will call the bio_capture function to capture the area that is going to be covered by this frame and keeps its address in _covered.

Protected Methods

  • int absRow()const; calculates the absolute row (relative to the left top corner of the screen) and returns it.
    it returns the sum of row() of this border plus all the row()s of the _frames
  • int absCol()const; calculates the absolute column(relative to the left top corner of the screen) and returns it.
    it returns the sum of col() of this border plus all the col()s of the _frames

Public Methods

  CFrame(int Row=-1, int Col=-1, int Width=-1,int Height=-1,
    bool Visible = false,
    const char* Border=C_BORDER_CHARS,
    CFrame* Frame = (CFrame*)0);
Sets the corresponding attributes to the incoming values in the argument list and set _covered to null
  virtual void draw(int fn=C_FULL_FRAME);
  • First it will capture() the coordinates it is supposed to cover
  • If frame is fullscreen() then it just clears the screen and exits.

Otherwise:

  • If the _visible flag is true, it will draw a box at _row and _col, with size of _width and _height using the _border characters and fills it with spaces. Otherwise it will just draw a box using spaces at the same location and same size.


  virtual void move(CDirection dir);

First it will hide the Frame, then adjust the row and col to more to the "dir" direction and then draws the Frame back on screen. 

  virtual void hide();

using bio_restore()it restores the characters behind the Frame back on screen. It will also free the memory pointed by _covered; 

  virtual ~CFrame();

It will make sure allocated memories are freed. 

  bool fullscreen()const;
  void visible(bool val);
  bool visible()const;
  void frame(CFrame* theContainer);
  CFrame* frame();
  void row(int val);
  int row()const;
  void col(int val);
  int col()const;
  void height(int val);
  int height()const;
  void width(int val);
  int width()const;

These functions set and get the attributes of the CFrame.

CFrame.cpp & Test1Frame.cpp Bug Fix for R0.3.5

Please visit my blog for the description and solution of the bug during the CFrame

CField

The code for this class is provided. You must understand and use it to develop your core classes.

CField is an abstract base class that encapsulates the commonalities of all Input Outputs Console Fields which are placeable on a CDialog. All Fields could be Framed, therefore a CField is int 

#include "cframe.h"
class CDialog;
class CField : public CFrame{
protected:
  void* _data;
public:
  CField(int Row = 0, int Col = 0,
         int Width = 0, int Height =0,
         void* Data = (void*) 0,
         bool Bordered = false,
         const char* Border=C_BORDER_CHARS);
  ~CField();
  virtual int edit() = 0;
  virtual bool editable() const = 0;
 
 
  virtual void set(const void* data) = 0;
  virtual void* data();
 
  void container(CDialog* theContainer);
  CDialog* container();
};

Attributes

  void* _data;

Will hold the address of any type of data a CField can hold.

Constructors and Methods

  CField(int Row = 0, int Col = 0,
         int Width = 0, int Height =0,
         void* Data = (void*) 0,
         bool Bordered = false,
         const char* Border=C_BORDER_CHARS);

Passes the corresponding attributes to it's parents constructor and then sets the _data attribute to the incoming Data argument. 

  ~CField();

Empty Destructor 

  virtual int edit() = 0;
  virtual bool editable() const = 0;
  virtual void set(const void* data) = 0;

Enforce the children to implement;

  • an edit() method
  • an editable() method that returns true if the class is to edit data and false if the class is to only display data.
  • a set() method to set the _data attribute to the data the class is to work with.
  virtual void* data();

Returns _data. 

  void container(CDialog* theContainer);
  CDialog* container();

Sets and Gets the _frame attribute of CFrame by calling CFrame::frame() method. Make sure to cast The CDialog to CFrame when setting and cast CFrame to CDialog when getting

CLabel

A readonly Field that encapsulates bio_display() function. (i.e it is responsible to display a short character string on the display) CLable although, by inheritance is Frame, but it is never bordered. 

#include "cfield.h"
class CLabel :  public CField{
   int _length;
 public:
   CLabel(const char *Str, int Row, int Col,
     int Len = 0);
   CLabel(int Row, int Col, int Len);
   CLabel(const CLabel& L);
   ~CLabel();
   void draw(int fn=C_NO_FRAME) ;
   int edit();
   bool editable()const;
   void set(const void* str);
};

Attributes

   int _length;

Holds the Length of the label, this will be stored to be passed to bio_display function.

Constructors / Destructor

   CLabel(const char *Str, int Row, int Col,
     int Len = 0);

passes the Row and Col to the CField constructor and then; if len is zero, it will allocate enough memory to store the string pointed by Str and then copies the Str into it. if len > 0, then it will allocate enough memory to store len chars in a string. In any way, the allocated memory is pointed by _data 

   CLabel(int Row, int Col, int Len);

Works exactly like the previous constructor, but len in this case can not be zero. (no validation required) and the string pointed by _data will be set to an empty string. 

   CLabel(const CLabel& L);

Copy Constructor 

   ~CLabel();

makes sure that memory pointed by _data is deallocated before the object is destroyed.

Methods

   void draw(int fn=C_NO_FRAME) ;

makes a direct call to bio_display, passing _data for the string to be printed and absRow() and absCol() for row and col and _length for len. this function ignores the argument fn. 

   int edit();

calls draw, returning 0. 

   bool editable()const;

always return false. 

   void set(const void* str);

if _length is greater than zero, it will copy the string pointed by str into the string pointed by _data upto _length characters. if _length is zero, it will delete the memory pointed by _data and reallocates enough memory for str and copies the string pointed by str into the newly allocated memory pointed by _data.

CDialog

Organizes CField objects on the screen, displays them and then lets the user edit them one by one. 

#include "cgh.h"
#include "cframe.h"
class CField;
 
class CDialog: public CFrame{
  private:
  int _fnum;            
/* Suggestion: */
  int _curidx;
  CField* _fld[C_MAX_NO_FIELDS];
  bool _dyn[C_MAX_NO_FIELDS];
/* you can do this part any way you like only if it covers the minimum requirements of the assignment*/
/* talk to your professor if you want to do it differently */
  bool _editable;
  public:
  CDialog(CFrame *Container = (CFrame*)0,
           int Row = -1, int Col = -1, 
           int Width = -1, int Height = -1, 
           bool Borderd = false,
           const char* Border=C_BORDER_CHARS);
   virtual ~CDialog();
  void draw(int fn = C_FULL_FRAME);
  int edit(int fn = C_FULL_FRAME);

  int add(CField* field, bool dynamic = true);
  int add(CField& field, bool dynamic = false);
  CDialog& operator<<(CField* field);
  CDialog& operator<<(CField& field);

  bool editable();
  int fieldNum()const;
  int curIndex()const;

  CField& operator[](unsigned int index);
  CField& curField();
};

Attributes

Mandatory

  int _fnum;

Holds the number of Fields added to the Dialog 

  bool _editable;

will be set to true if any of the Fields added are editable.

Optional

This is optional because it depends on how you are going to implement the collection of CFields: 

  int _curidx;

Holds the index of the Field that is currently being edited. 

  CField* _fld[C_MAX_NO_FIELDS];

Array of CField pointers to hold the address of the CField objects added to the screen. 

  bool _dyn[C_MAX_NO_FIELDS];

Holds series of boolean to the exact number of fields, and each boolean here will hold false if the corresponding field pointed by _fld is allocated dynamically or not. This array will later on be used by destructor to decide which object is dynamic and to be deleted.

Constructors/Destructors

  CDialog(CFrame *Container = (CFrame*)0,
           int Row = -1, int Col = -1, 
           int Width = -1, int Height = -1, 
           bool Borderd = false,
           const char* Border=C_BORDER_CHARS);

The constructor, passes all the incoming arguments to the corresponding arguments of the apparent constructor CFrame.
Then it will set called a attributes to their default values and then sets all the field pointers (_fld) to NULL. It also sets all the dynamic (_dyn) flags to false. 

  virtual ~CDialog();

The destructor, will loop through all the field pointers and if the corresponding dynamic flag is true then it will delete the field pointed to by the field pointer.

Methods

  void draw(int fn = C_FULL_FRAME);

If fn is C_FULL_FRAME, it will call its parent draw. Then It will draw all the Fields in the Dialog.
If fn is not C_FULL_FRAME, then it will just draw all the Fields in the Dialog.
If fn is a non-zero positive value, then it will only draw Field number fn in the dialog. (First added Field is field number one.) 

  int edit(int fn = C_FULL_FRAME);

If CDialog is not editable (all fields are non-editable), it will just display the Dialog and then waits for the user to enter a key and then terminates the function returning the key.
If fn is 0 or less, then before editing, the draw method is called with fn as its argument and then editing begins from the first editable Field.

If fn is greater than 0 then editing begins from the first editable key on or after Field number fn.

Note that fn is the sequence number of field and not the index. (First field number is one)

Start editing from field number fn;

Call the edit of each field and depending on the value returned, do the following:

  1. For ENTER_KEY, TAB_KEY and DOWN_KEY, go to next editable Field , if this is the last editable Field then restart from Field number one.
  2. For UP_KEY go to the previous editable Field, if there is no previous editable Field, go to the last editable Field in the Dialog.
  3. For any other key, terminate the edit function returning the character which caused the termination.
  int add(CField* field, bool dynamic = true);

Adds the CField' pointed by field to the Fields of the Dialog; by appending the value of the field pointer after the last added field in the _fld array , setting the corresponding _dyn element to the value of dynamic argument and then increasing _fnum by one and returning it.
important note:
 Make sure that add() sets the container of the added CField to this CDialog object, using the container() method of CField 

  int add(CField& field, bool dynamic = false);

Makes a direct call to the first add method. 

  CDialog& operator<<(CField* field);

Makes a direct call to the first add method, ignoring the second argument and then returns the owner (current CDialog). 

  CDialog& operator<<(CField& field);

Makes a direct call to the second add method, ignoring the second argument and then returns the owner (current CDialog). 

  bool editable();

Returns _editable; 

  int fieldNum()const;

returns _fnum. 

  int curIndex()const;

returns _curidx; 

  CField& operator[](unsigned int index);

Returns the reference of the Field with incoming index. (Note that here, the first field index is 0) 

  CField& curField();

Returns the reference of the Field that was just being edited.

CLineEdit

ClineEdit encapsulates the bio_edit function of bio library. 

#pragma once
#include "cfield.h"

class CLineEdit: public CField{
  bool _dyn;
  int _maxdatalen;
  int* _insertmode;
  int _curpos;
  int _offset;
public:
  CLineEdit(char* Str, int Row, int Col, int Width,
    int Maxdatalen, int* Insertmode, 
    bool Bordered = false,
          const char* Border=C_BORDER_CHARS);
  CLineEdit(int Row, int Col, int Width,
    int Maxdatalen, int* Insertmode, 
    bool Bordered = false,
          const char* Border=C_BORDER_CHARS);
  ~CLineEdit();
  void draw(int Refresh = C_FULL_FRAME);
  int edit();
  bool editable()const;
  void  set(const void* Str);
};


  CLineEdit(char* Str, int Row, int Col, int Width,
    int Maxdatalen, int* Insertmode, 
    bool Bordered = false,
          const char* Border=C_BORDER_CHARS);

LineEdit, sets the Field's _data to the value of str. If LineEdit is instantiated with this constructor then it will edit an external string provided by the caller function of LineEdit. LineEdit in this case is not creating any dynamic memory, therefore _dyn is set to false (therefore the destructor will not attempt to deallocate the memory pointed by _data).
The location (row and col) and Bordered are directly passed to the parent (FWField) and str is passed as data to the parent constructor. Unlike Label, LineEdit could have border or not so depending on this (Bordered being true or false) the Height is set to 3 or 1 respectfully.
(hint: use ? : operator to pass the proper Height value to FWField's constructor) 

  CLineEdit(int Row, int Col, int Width,
    int Maxdatalen, int* Insertmode, 
    bool Bordered = false,
          const char* Border=C_BORDER_CHARS);

Works exactly like the previous constructor with one difference; since no external data is passed to be edited here, this constructor must allocate enough dynamic memory to accommodate editing of Maxdatalen characters. Then make it an empty string and set Fields's _data to point to it. Make sure _dyn is set to true in this case, so the destructor knows that it has to deallocate the memory at the end. 

  ~CLineEdit();

If _dyn is true, it will deallocate the character array pointed by Fields's _data 

  void draw(int Refresh = C_FULL_FRAME);

It will first call Frame's draw passing Refreshas an argument to it.
Then it will make a direct call to bio_display to show the data kept in Field's _data.
The values used for the arguments of bio_display are:

  • str: address of string pointed by _data + the value of _offset
  • row: absRow() (add one if border is visible)
  • col: absCol() (add one if border is visible)
  • len: width() (reduce by two is border is visible')
  int edit();

Makes a direct call to, and returns bio_edit(). For the coordinates and width arguments follow the same rules as the draw function. For the rest of the arguments of bio_edit, use the attributes of CLineEdit. 

  bool editable()const;

Always return true; 

  void  set(const void* Str);

Copies the characters pointed by Str into the memory pointed by Field's _data up to _maxdatalen characters.

CButton

Button is a child of CField. It displays a small piece of text (usually one word or two) and accepts one key hit entry. When in edit mode, to indicate the editing mode, it will surround the text with squared brackets. 

#pragma once
#include "cfield.h"
 class  CButton: public CField{
 public:
   CButton(const char *Str, int Row, int Col, 
            bool Bordered = true,
            const char* Border=C_BORDER_CHARS);
   virtual ~CButton();
   void draw(int fn=C_FULL_FRAME);
   int edit();
   bool editable()const;
   void set(const void* str);
 };

Attributes

This class does not have any attributes of its own!

Constructor / Destructor

   CButton(const char *Str, int Row, int Col, 
            bool Bordered = true,
            const char* Border=C_BORDER_CHARS);

When creating a Button, allocate enough memory to hold the contents of the Str and set Field's _data to point to it. Then copy the content of Str into the newly allocated memory.
Pass all the arguments directly to Field's constructor.
For Field size (width and hight) do the following:
For width: Set width to the length of Str + 2 (adding 2 for surrounding brackets) or if the Button is bordered set width to the length of Str + 4 (adding 2 for surrounding brackets and 2 for the borders). For height: Set the height to 1 or if the Button is bordered, set the height to 3. 

   virtual ~CButton();

Deallocates the allocated memory pointed by Field's _data.

Methods

   void draw(int fn=C_FULL_FRAME);

Draws the Button with border around it if it is Bordered. Note that there should be a space before and after of the text that will be used to surround the text with "[" and "]"
hint:

  • First calls Frame's draw(fn) (passing the fn argument to the parents draw)
Use bio_display to display the Button's text (pointed by Field's _data)
  • If not bordered
    display the text at absRow() and absCol()
  • If bordered
    display the text at absRow()+1 and absCol()+2
   int edit();

First draw() the Button, then surround it by squared brackets, place the cursor under the first character of Button's text and wait for user entry.
When user hits a key, if the key is ENTER_KEY or SPACE, return C_BUTTON_HIT (defined in cgh.h) otherwise return the entered key.

   bool editable()const;

Always returns true; 

   void set(const void* str);

Reallocate memory for new text and then set it to content of str
hint:

First deallocated what is pointed by Field's _data.
Then allocate new memory to the size of content of str and copy the content into it and make Field's _data point to it.

CCheck

#include "cfield.h"
#include "clabel.h"
class CCheck : public CField{
  int _flag;
  int _radio;
  char _format[4];
  CLabel _Label;
public:
  CCheck(bool Checked,const char* Format, const char* Text, int Row, int Col, int Width, bool IsRadio = false);
  CCheck(const CCheck& C);
  void draw(int fn = C_NO_FRAME) ;
  int edit();
  bool editable()const;
  void set(const void* flag);
// note that void *data() is removed!!!
  bool checked()const;
  void checked(bool val);
};

Attributes

  int _flag;
  int _radio;
  char _format[4];
  CLabel _Label;
  • _flag holds the status of the Checkbox (0: unchecked or 1: checked ) and is pointed by _data pointer .
  • _radio dictates the behavior of the Checkbox as a radio-button, or a check-mark.
  • _format holds the characters, the Checkbox is drawn with (i.e. "[X]", "(O)", "<*>", etc...).
  • _Label holds the Label attached to the this Checkbox

Constructor / Destructor

  CCheck(bool Checked,const char* Format, const char* Text, int Row, int Col, int Width, bool IsRadio = false);
  • Passes the Row, Col, Width and "1" to row, col, width and height arguments of CField and directly initializes* _Label with Text, 0, 4, and (Width-4) for Str, Row, Col and Len, arguments of CLabel's Constructor.
    *see page 64 of Practical Programming Techniques Using C++
  • Sets the frame of _Label to itself
  • Sets _flag to Checked
  • Sets _radio to IsRadio
  • Copies Format to _format
  • Sets _data to the address of _flag
  CCheck(const CCheck& C);
  • Passes incoming CCheck reference ("C") to CField's copy constructor, and directly initializes the _Label with the _Label of C
  • Sets all the attributes of this object to the attributes of incoming CCheck reference ("C")
  • Sets _data to the address of _flag

Methods

  void draw(int fn = C_NO_FRAME) ;
  • Uses bio_displayflag() to display _flag using _format at absRow() and absCol()
  • Then draw()s the _Label
  int edit();
  • returns bio_flag()'s returned value.
    bio_flag is to edit the value of _flag using the same arguments used in draw() as radiobutton or checkbox depending to the value of _radio
  bool editable()const;
  • Always return true;
  void set(const void* flag);
  • Casts the incoming flag pointer to an (int*) and sets the content of _flag to where flag is pointing to.
  bool checked()const;
  void checked(bool val);
  • These methods set and get _flag.

CMenuItem

#include "cfield.h"
class CMenuItem:public CField{
  int  _selected;
  char _format[3];
  char* _text;
public:
  CMenuItem(bool Selected,const char* Format, const char* Text, int Row, int Col, int Width);
  CMenuItem(const CMenuItem &CM);
  virtual ~CMenuItem(void);
  void draw(int fn = C_NO_FRAME) ;
  int edit();
  bool editable()const;
  void set(const void* Selected);
  bool selected()const;
  void selected(bool val);
  const char* Text();
};

Attributes

  int  _selected;
  char _format[3];
  char* _text;
  • _selected holds the status of the menuitem (0: not selected, 1: selected) and is pointed by _data.
  • _format hods the surrounding "selection indicator" characters used by bio_displaymenuitem.
  • _text points to the allocated memory holding the text of the menuitem

Constructors / Destructor

  CMenuItem(bool Selected,const char* Format, const char* Text, int Row, int Col, int Width);
  • Sets _selected to Selected (0 for false and 1 for true)
  • Copies Format into _format
  • Allocated enough memory to hold Text and sets _text to address of newly allocated memory
  • Copies the string pointed by Text into _text
  • Sets _data to the address of _selected
  • It passes the Row, the Col and the Width to the CField constructor
  CMenuItem(const CMenuItem &CM);
  • Passes the incoming CMenuItem ("CM") to CFiled's constructor
  • Allocated enough memory to hold CM._text and sets _text to address of newly allocated memory
  • Copies the string pointed by CM._text into _text
  • Sets _selected to CM._selected
  • Sets _data to the address of _selected
 ~CMenuItem(void);
  • Deallocated the memory pointed by _text

Methods

  void draw(int fn = C_NO_FRAME) ;
  • Draws the object using bio_displayMenuItem function.
    Make sure absRow() and absCol() are used for Row and Col args of bio_displayMenuItem
  int edit();
  • Returns the returned value of bio_menuItem() using the same arguemtns used in draw()
  bool editable()const;
  • Always returns true
  void set(const void* Selected);
  • Sets _selected to content pointed by Selected
  bool selected()const;
  void selected(bool val);
  • These methods set and get _selected.
  const char* Text()const;
  • Returns _text

Complex Core User Interface classes

CValEdit

#include "clineedit.h"
class CValEdit: public CLineEdit{
  void (*_help)(MessageStatus, CDialog&);
  bool (*_validate)(const char*, CDialog&);
public:
  CValEdit(char* Str, int Row, int Col, int Width,
        int Maxdatalen, int* Insertmode,
        bool (*Validate)(const char* , CDialog&) = NO_VALDFUNC, 
        void (*Help)(MessageStatus, CDialog&) = NO_HELPFUNC,
        bool Bordered = false,
        const char* Border=C_BORDER_CHARS);
  CValEdit(int Row, int Col, int Width,
        int Maxdatalen, int* Insertmode,
        bool (*Validate)(const char* , CDialog&) = NO_VALDFUNC, 
        void (*Help)(MessageStatus, CDialog&) = NO_HELPFUNC,
        bool Bordered = false,
        const char* Border=C_BORDER_CHARS);
  int edit();
};

Attributes

  void (*_help)(MessageStatus, CDialog&);
  bool (*_validate)(const char*, CDialog&);
  • _help, holds the address of the help logic (function) or NULL if there is no help function is assigned
  • _validate, holds the address of the validation logic (function) or NULL if there is no validation function is assgned

Constructors

  CValEdit(char* Str, int Row, int Col, int Width,
        int Maxdatalen, int* Insertmode,
        bool (*Validate)(const char* , CDialog&) = NO_VALDFUNC, 
        void (*Help)(MessageStatus, CDialog&) = NO_HELPFUNC,
        bool Bordered = false,
        const char* Border=C_BORDER_CHARS);
  CValEdit(int Row, int Col, int Width,
        int Maxdatalen, int* Insertmode,
        bool (*Validate)(const char* , CDialog&) = NO_VALDFUNC, 
        void (*Help)(MessageStatus, CDialog&) = NO_HELPFUNC,
        bool Bordered = false,
        const char* Border=C_BORDER_CHARS);

These constructors pass all their arguments to corresponding arguments of CLineEdit constructor and then set _help and _validate attributes to the corresponding incoming arguments

Method

  int edit();

If the container() is NULL then this function works exactly like LineEdit::edit().
If the container() is not NULL:

  1. If _help function exist it calls the function passing MessageStatus::SetMessage and container()'s reference as arguments.
  2. Calls LineEdit's edit()
  3. If validation function exists and the terminating key of LineEdit's edit() is a navigation key(see below)
    It will call the validation function on the Field's _data, if the data is valid, it goes to next step, otherwise it will repeat calling LineEdit's edit().
  4. After validation is done, if _help function exists, it will recall the help function using MessageStatus::ClearMessage and contianer()'s reference as arguments.
  5. It will return the terminating key

Navigation keys are Up key, Down key, Tab key or Enter key.
MessageStatus is enumerated in cgh.h

CText

#include "cfield.h"


class CText:public CField{
 // WHATEVER _lines;  // a collection of lines (will be set later) 
  bool _readOnly;
  int _curpos;
  int _fieldlen;
  int _maxdatalen; 
  int* _insertmode;
  int _offset;
  int _lcurpos;
  int _loffset;
 // bool _dynamic;
public:
  CText(int Row, int Col, int Width, int Height, bool Readonly,
    int* Insertmode, const char* Border=C_BORDER_CHARS);
  CText(const char* Str, int Row, int Col, int Width, int Height, bool Readonly,
    int* Insertmode, const char* Border=C_BORDER_CHARS);
  void draw(int fn = C_FULL_FRAME);

  void set(const void *Str);
  void *data();

  int edit();
  bool  editable()const;
  bool readOnly();
  void readOnly(bool val);
  ~CText();
};

CCheckList

#include "cfield.h"
#include "ccheck.h"

class CCheckList;
class CCheckList : public CField{
  ?????? 
  bool _radio;
  char _format[4];
  int _cnt;
  unsigned int _flags;
public:
  CCheckList(const char* Format, int Row, int Col, int Width,bool radio, bool Bordered = true,const char* Border=C_BORDER_CHARS);
  CCheckList& add(const char* Text, bool selected = false);
  void draw(int fn = C_FULL_FRAME);
  int edit();
  void* data();
  void set(const void* data);
  bool& operator[](unsigned int index);
  bool editable()const;
  bool radio();
  void radio(bool val);
  ~CCheckList(void);
};

CMenu

#include "cfield.h"
#include "cmenuitem.h"
class Cmenu;

class CMenu : public CField{
  ????? 
public:
  CMenu(const char* Format, int Row, int Col, int Width, bool Bordered = true,const char* Border=C_BORDER_CHARS);
  CMenu& add(const char* Text, bool selected = false);
  void draw(int fn = C_FULL_FRAME);
  int edit();
  void* data();
  void set(const void* data);
  int selectedIndex();
  int selectedIndex(unsigned int index);
  const char* selectedText();
  void selectedText(char *text);
  bool editable()const;
  ~CMenu(void);
};

Make Files and Testers

Copy these makefiles under "makefile" name in root of your project in Linux or Mac.
Replace the "<tab>" with tab character
then issue the make command:
$make <enter>
this will compile your code and create an executable called prjexe, if there is no error
Also, copies of all these make files and tester programs are commited to: svn://zenit.senecac.on.ca/oop344/trunk/Testers
 The executable of testers are compiled and copied in my account on matrix:
login to matix and run:
$~fardad.soleimanloo/t[X]
where [X] is number of the test. (i.e. run $fardad.soleimanloo/t3 for test3

Test2 Make file

t2: bio.o cframe.o cfield.o cdialog.o clabel.o Test2DialogAndLabel.o
<tab>c++  bio.o cframe.o cfield.o cdialog.o clabel.o \
Test2DialogAndLabel.o -lncurses -oprjexe

bio.o: bio.c bio.h
<tab>cc -c bio.c

cframe.o: cframe.cpp cframe.h cgh.h
<tab>c++ -c cframe.cpp

cfield.o: cfield.cpp cfield.h cgh.h cframe.h
<tab>c++ -c cfield.cpp

cdialog.o: cdialog.cpp cdialog.h cfield.h cgh.h cframe.h
<tab>c++ -c cdialog.cpp

clabel.o: clabel.cpp clabel.h cfield.h cframe.h cgh.h
<tab>c++ -c clabel.cpp

Test2DialogAndLabel.o: Test2DialogAndLabel.cpp clabel.h cdialog.h cframe.h cgh.h cfield.h
<tab>c++ -c Test2DialogAndLabel.cpp

Test 3 make file


prj: bio.o cframe.o cfield.o cdialog.o clabel.o clineedit.o Test3DialogAndLineEdit.o
<tab>c++  bio.o cframe.o cfield.o cdialog.o clabel.o clineedit.o Test3DialogAndLineEdit.o \
-lncurses -oprjexe

bio.o: bio.c bio.h
<tab>cc -c bio.c

cframe.o: cframe.cpp cframe.h cgh.h
<tab>c++ -c cframe.cpp 

cfield.o: cfield.cpp cfield.h cgh.h cframe.h
<tab>c++ -c cfield.cpp 

cdialog.o: cdialog.cpp cdialog.h cfield.h cgh.h cframe.h
<tab>c++ -c cdialog.cpp 

clabel.o: clabel.cpp clabel.h cfield.h cframe.h cgh.h
<tab>c++ -c clabel.cpp 

clineedit.o: clineedit.cpp clineedit.h cfield.h cframe.h cgh.h 
<tab>c++ -c clineedit.cpp 
  
Test3DialogAndLineEdit.o: Test3DialogAndLineEdit.cpp clineedit.h clabel.h cdialog.h cfield.h cframe.h cgh.h 
<tab>c++ -c Test3DialogAndLineEdit.cpp

Full Project Makefile

Not Tested! 

prj: bio.o cframe.o cfield.o cdialog.o clabel.o clineedit.o cmenuitem.o cbutton.o  ccheck.o cchecklist.o cmenu.o cveditline.o  ctext.o strarr.o prj.o
  c++  bio.o cframe.o cfield.o cdialog.o clabel.o clineedit.o cmenuitem.o cbutton.o  ccheck.o cchecklist.o cmenu.o cveditline.o  ctext.o strarr.o prj.o \
  -lncurses -oprjexe

bio.o: bio.c bio.h
  cc -c bio.c

cframe.o: cframe.cpp cframe.h cgh.h
  c++ -c cframe.cpp 

cfield.o: cfield.cpp cfield.h cgh.h cframe.h
  c++ -c cfield.cpp 

cdialog.o: cdialog.cpp cdialog.h cfield.h cgh.h cframe.h
  c++ -c cdialog.cpp 

clabel.o: clabel.cpp clabel.h cfield.h cframe.h cgh.h
  c++ -c clabel.cpp 

clineedit.o: clineedit.cpp clineedit.h cfield.h cframe.h cgh.h 
  c++ -c clineedit.cpp 

cmenuitem.o: cmenuitem.cpp cmenuitem.h cfield.h cframe.h cgh.h 
  C++ -c cmenuitem.cpp

cbutton.o: cbutton.cpp cbutton.h cfield.h cframe.h cgh.h 
  c++ -c cbutton.cpp 

ccheck.o: ccheck.cpp ccheck.h clabel.h cfield.h cframe.h cgh.h 
  c++ -c ccheck.cpp 

cchecklist.o: cchecklist.cpp cchecklist.h ccheck.h clabel.h cfield.h cframe.h cgh.h 
  c++ -c cchecklist.cpp
  
cveditline.o: cveditline.cpp cveditline.h clineedit.h cfield.h cframe.h cgh.h 
  c++ -c cveditline.cpp 

strarr.o: strarr.cpp strarr.h
  c++ -c strarr.cpp

ctext.o: ctext.cpp ctext.h clineedit.h cfield.h cframe.h cgh.h  strarr.h 
  c++ -c ctext.cpp          
         
cmenu.o: cmenu.cpp cmenu.h cmenuitem.h cfield.h cframe.h cgh.h 
  c++ -c cmenu.cpp

prj.o: prj.cpp cframe.h cfield.h cdialog.h clabel.h clineedit.h cmenuitem.h cbutton.h  ccheck.h cchecklist.h cmenu.h cveditline.h  ctext.h
  c++ -c prj.cpp
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