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no edit summary
Save your work in separate files for each class, and name the files to the same name as the classes; each class should have a header file and a code file.
For example for the class [[#Field IOField | BFieldIOField]], create ''bfieldiofield.h'' and ''bfieldiofield.cpp''. The header file should hold the class declaration, and any other possible declaration related to the class. The "cpp" file should hold the definition (implementation) of the class, and its methods and possible functions.
<big>
extern "C"{
#include "biofiof.h"
};
</big>
This tells to C++ compiler, the included header file contains C functions and should be complied and called as such. Remember, you do not need and should not rename your bioliof.c to bioliof.cpp, since the compiler is already aware of the C functions in bioliof.c.
= Header Files =
== General Definition Header file ==
create a file called: '''btextiotext.h'''. This file will contain any necessary definitions or possible inclusions for the project.
This file will be included to most of your project code to carry general definitions for your project.
For now add the following define statements in '''btextiotext.h'''.
Keep checking this section for additions during the development of the project
#define MAX_NO_FIELDS 500
#define FRAME_CHARS "/-\\|/-\\|"
enum MessageStatus{ClearMessage,SetMessage};
# undef NO_HFUNC
# endif
# define NO_HFUNC ((void(*)(MessageStatus, BFormIOForm&))(0))
# ifdef NO_VFUNC
# undef NO_VFUNC
# endif
# define NO_VFUNC ((bool(*)(const char*, BFormIOForm&))(0))
#endif
= Mandatory Classes =
To initiate development of the OpText TextEdit application, we need to encapsulate the functions written in "[[BIOF 20101 (AS1) Oop344 20102 - OOP344iof functions|BIOFIOF]]".
The main design is based on the input/output objects that can be positioned on a Form. Each input/output object is responsible to encapsulate a form of entry or display: a '''Label''' to display text, a '''Line Editor''' do display and edit a character string, a '''Check Box List''' to be able to select one or many of many options, a '''Button''' to confirm actions, and etc....
Also as mentioned above, A Form object is responsible to hold the input/output objects and display and edit them in an orderly fashion. A Form, so to speak, could be an array or list of input/output objects.
These objects by design, could be framed, which means they can have a border drawn around them. Because of this, a class needs to be designed (we call it '''BFrameIOFrame''') to represent a Frame and this class should be inherited by all Framed objects.
Also, the input/output objects all have the same purpose (that is displaying or editing something). This "same purpose" will be encapsulated in a class called '''BFieldsIOField''' that presents the idea of an input/output object in a form.
== BFrame IOFrame ==
'''BFrameIOFrame''' is implemented in two files, '''bframeioframe.h''' and '''bframeioframe.cpp'''
'''BFrameIOFrame''' is a class encapsulating a Frame. It has a location on the Form that is its left, top coordinates (i.e. '''col''' and '''row''') also a width and a height to specify how wide and tall the frame is.
'''BFrameIOFrame''' can be invisible, which means, it will have all the specs, but it does not draw any border around itself.
'''BFrameIOFrame''' can obviously draw itself on the screen at a specific location with specific offset. <big><pre>
<big><syntaxhiglight lang="cpp">class BFrame IOFrame {
private:
bool _visible;
?????
int _row;
int _col;
int _width;
public:
int height = -1, int width = -1
,bool visible = false
);
virtual ~BFrameIOFrame();
void draw(int RowOffset = 0, int ColOffset = 0) const;
void setVisible(bool visible);
void setSize(int height, int width);
virtual BFrameIOFrame& row(int val); virtual BFrameIOFrame& col(int val);
virtual int row()const;
virtual int col()const;
bool IsVisible()const;
};
</presyntaxhiglight></big>
'''Constructor:''' Sets the corresponding values to the incoming arguments. if any of the row, col, height or width is less than 0, then the frame will be set to full-screen, which means, row and col will be set to 0 and width and height will be set to the number of columns and rows of the screen, respectively.
'''Destructor:''' Does Nothing. This is an empty destructor.
'''void draw(int RowOffset = 0, int ColOffset = 0) const:''' , if the frame is visible, then it draws a rectangle on the screen with its left, top at col+ColOffset and row+RowOffset respectively. The width and height of the rectangle will be equal to the corresponding attributes in the class.
The frame is drawn using the characters specified in '''FRAME_CHARS''' in '''btextiotext.h''' as follows:<big><pre>
Index Character
0 left-top
6 bottom-left
7 left border
</pre></big>
In full screen mode the four corners are not printed.
*'''void setSize(int height, int width);''' Sets the _height and _width to the incoming values
*'''virtual BFrameIOFrame& row(int val);''' Sets the _row to incoming '''val''' and then returns a reference of BFrameIOFrame
*'''virtual BFrameIOFrame& col(int val);''' Sets the _col to incoming '''val''' and then returns a reference of BFrameIOFrame
*'''virtual int row()const;''' returns the value of _row
*'''virtual int width()const;''' return the value of _width
*'''bool IsVisible()const;''' returns the status of BFrameIOFrame, true, if the frame is visible and false if it is notHere is how a BFrame IOFrame looks like when it is drawn:
[[File:BFrame.gif]]
<br />
[http://pastebin.ca/1823508 [OOP344 20102 IOFrame test main|A main() function to test BFrameIOFrame::draw Offsets]]<br />
== BField IOField ==
''' BField IOField ''' represents an input/output object. It is a Framed object, which means it '''publicly''' inherits BFieldIOFrame.
Each BField IOField gets its location (row and col) and its size (height and width) from its grandparent BFrameparent IOFrame.
Because BField IOField is to do input/output, it needs a general way to be able to hold/keep track of the data it is inputting or outputting.
To accommodate the above we create the following class:
<big><pre>
# include "bframeioframe.h"
class BFormIOForm;//R0.3 private inheritance changed to publicclass BFieldIOField: public BFrameIOFrame{
private:
protected:
void* _data;
public:
void* data = (void*) 0, bool framed = false
);
virtual ~BFieldIOField();
virtual void display() const;
virtual int edit() = 0;
virtual bool editable() const = 0;
virtual void* data();
void set(BFormIOForm* owner);
int row()const;
int col()const;
int height()const;
int width()const;
};
</pre></big>
* '''_owner''' Holds the address of the Form the BField IOField Belongs to. If null, it means the BField IOField does not belong to any Form and it is stand alone
* '''_data''' Holds the address of the data being edited by this IO Field.
* '''BFieldIOField(int row = 0, int col = 0, void* data = (void*) 0, bool framed = false);''' Passes row and col to BFrame IOFrame and also passes 0 to BFrame IOFrame for height and width. Then the constructor sets the _data address to incoming data address and sets the _owner to null.
Since a BField IOField has ONLY what is common between different IO Fields, it can not have the final say on several of its own values. For example, the height and width depends of type of the IO it is going to be.
* '''virtual ~BFieldIOField();''' Does nothing.
* '''virtual void display() const;''' Depending to be an element of a Form (see BFormIOForm) or be a stand alone IO Field, it does the following:
If the the BFieldIOField's _owner attribute is null (it is not an element on a Form, or better to say it does not belong to a Form), it calls BFrameIOFrame::draw() with no arguments, otherwise(if _owner is not null) it calls the BFrameIOFrame::draw() passing its the _owner's row and col as offset arguments.''By doing this, if BField IOField is an element on a form, its location becomes relative to the Form it is in and not the screen''
* '''virtual int edit() = 0;''' Enforces the children to have an edit method
* '''virtual void* data();''' Returns the value the _data attribute
* '''void set(BFormIOForm* owner);''' Sets the _owner attribute to incoming owner address. (this method will be used by BForm IOForm to become the owner of the BFields IOFields being added it)
* '''int row()const;''' Returns the row of the BFrameIOFrame, but if the _owner is not null, the value of the row of the _owner will be added to returned value.
* '''int col()const;''' Returns the col of the BFrameIOFrame, but if the _owner is not null, the value of the col of the _owner will be added to returned value.
* '''int height()const;''' Returns the height of the BFrameIOFrame.
* '''int width()const;''' Returns the width of the BFrameIOFrame.* '''R0.3: virtual BFieldIOField& set(const void* data) = 0;''' Enforces the children to have a set method for setting the value of _data.
* '''R0.4: BFormIOForm* owner();''' returns the value of the '''_owner''' attribute.
== BLabel ==
BLabel is a BField IOField to display a string of characters. It essentially encapsulates bio_display().
The only attribute BLabel need in addition to its parents is an integer to Hold the length of the string to be shown.
<big><pre>
#include "bfieldIOField.h" class BLabel: public BFieldIOField{
int _length;
public:
// modified in R0.3
};
</pre></big>
Allocation should be done after setting the '''_length''' to the proper value; if len is less than or equal to zero, then '''_length''' will be set to the length of the '''str''', otherwise, '''_length''' will be set to the value of incoming '''len'''.
After this, '''_length +1 ''' chars should be allocated and it address should be kept in '''BFieldIOField::_data'''
Then the contents of str should be copied up to _legnth chars into '''BFieldIOField::_data'''. Make sure that the string is null terminated.
*'''BLabel(int row, int col, int len);'''
This constructor is used to create an empty BLabel. It works exactly like the above constructor, with one difference; there is no string to initialize the newly allocated memory.
'''_length''' is set to incoming '''len''' and then '''BFieldIOField::_data''' is set to the address of the newly allocated '''_length +1 ''' chars.
Set the first char of the _data to null to set the string to blank.
*'''virtual ~BLabel();''' Deletes the data held in BFieldIOField::_data
*'''void display() const;''' Using bio_display, displays BFieldIOField::_data at BFieldIOField::row() and BFieldIOField::col(), up to _length characters
*'''int edit();''' Calls the display() method and returns 0.
*'''bool editable()const;''' Always return false
*'''BFieldIOField& set(const void* str);''' Copies the '''str''' into BFieldIOField::_data up to _length chars and then returns a reference of the BLabel.
== BEdit ==
BEdit is A BField IOField that is responsible to encapsulate the bio_edit.
To do so in addition to the attributes of its parents; row, col and width (that is fieldlen) it needs to have the following:
*An integer pointer to hold the address of the insert status.
<big><pre>
class BEdit: public BFieldIOField{
bool _dyn;
int _maxdatalen;
//Modified in R0.3
};
</pre></big>
*'''BEdit(char* str, int row, int col, int fieldlen,int maxdatalen, int* insertmode,bool framed = false);'''
Edit, sets BFieldIOField::_data to value of str. If BEdit is instantiated with this constructor then it will edit an external string provided by the caller function of BEdit. BEdit in this case is not creating any dynamic memory, therefore '''_dyn''' is set to false;
The location (row and col) and '''framed''' are directly passed to the parent and str is passed as data to the parent constructor.
Unlike BLabel, BEdit could be framed or not so depending on this (framed being true or false) the size (width and height) of BEdit are set as follows:
*'''BEdit(int row, int col, int fieldlen,int maxdatalen, int* insertmode,bool framed = false);''' This Constructor works exactly like the above with respect to location and size, but for data, because no data is provided to edit, it will create a dynamic, blank char string to accommodate the editing.
the size of the allocation will be maxdatelen +1 and obviously _dyn is set to true, so the destructor knows the memory has to be deallocated at the time of destruction. The allocated memory should be pointed by BFieldIOField::_data.*'''~BEdit();''' If _dyn is true it will delete the string pointed by BFieldIOField::_data.
*'''void display()const;''' First it will call the display() method of its parent and then makes a direct call to bio_display using the row(), col() and fieldlen() accessors.
*'''int edit();''' makes a direct call to bio_edit passing the corresponding values from the attributes and accessor methods. the IsTextEditor is set t '''0''' and the readonly is set to '''0''' too (for now).
*'''bool editable()const;''' returns true
*'''int row()const;''' returns the BFieldIOField::row() but it will add one to it, if BEdit is framed*'''int col()const;''' returns the BFieldIOField::col() but it will add one to it, if BEdit is framed*'''int fieldlen()const;''' returns the BFrameIOFrame::width() but reduces it by 2 if BEdit is framed*'''BFieldIOField& set(const void* str);''' copies the content of str into BFieldIOField::_data up to maxdatalen characters.
== BForm IOForm ==
<big><pre>
# include "btextiotext.h"
class BFrameIOFrame;class BFieldIOField;
class BFormIOForm: public BFrameIOFrame{
private:
int _fnum;
int _curidx;
bool _dyn[MAX_NO_FIELDS];
bool _editable;
public:
int height = -1, bool framed = false);
virtual ~BFormIOForm();
void display(int fn = OT_CLR_AND_DSPLY_ALL)const;
int edit(int fn = 0, BFormIOForm* owner = (BFormIOForm*)0);BFormIOForm& add(BFieldIOField* field, bool dynamic = true);BFormIOForm& add(BFieldIOField& field, bool dynamic = false);
bool editable();
int fieldNum()const;
int curField()const;
};
</pre></big>
* '''_fnum''' is the number of BFields IOFields added to the BFormIOForm
* '''_curidx''' is the index of the current BField IOField being edited.
* '''_fld''' is an array of BField IOField pointers. Initially all the elements of _fld is set to null. When a BField IOField is added to the form, it will be pointed by one of the elements of this array.
* '''_dyn''' is an array of boolean values exactly to the number of elements of '''_fld'''. When BField IOField number '''"n"''' is added to BForm IOForm and is pointed by '''_fld[n-1]''' , the corresponding '''_dyn[n-1]''' indicate if the BField IOField held in '''_fld[n-1]''' is dynamically allocated or not. the '''_dyn''' flags will be used in the destructor as deallocation condition for each _fld element.
* '''_editable''' is set to true, if at least one of the BFields IOFields in '''_fld''' is editable.
* '''_owner''', If a BForm IOForm is being used by another BFormIOForm, then the '''_owner''' of the used BForm IOForm will be set to the user-BFormIOForm.
* '''BFormIOForm(int row = -1, int col = -1, int width = -1, int height = -1, bool framed = false);''', creates a BFormIOForm. It passes the coordinates (row and col) and size (width and height) and also the framed flag to its parent BFrameIOFrame.
Then it will set all the '''_fld''' elements to null, '''_fnum''' to 0 (empty BFormIOForm), _editable to false and _curidx to 0 and _owner to (BFormIOForm*) 0;
* '''~BFormIOForm()''' goes through all '''_fld''' elements from 0 to '''_fnum''', if the corresponding '''_dyn''' element is true, it will then delete the BField IOField pointed by that '''_fld''' element.
* '''void display(int fn = 0)const;'''<br />
If '''fn''' is OT_CLR_AND_DSPLY_ALL, then it will check to see if _owner is not null. If _owner is not null, it will call the _owner's display() with OT_CLR_AND_DSPLY_ALL, otherwise it will just clear the screen.<br />
Then it first call BFrameIOFrame::draw() and then it will display all the _fld elements, one by one.
If '''fn''' is OT_DSPLY_ALL then it will just call BFrameIOFrame::draw() and then it will display all the _fld elements, one by one.<br />
If '''fn''' is greater than 0 then it will only display '''_fld''' number '''fn''' (_fld[fn-1])
* '''int edit(int fn = 0, BFormIOForm* owner = (BFormIOForm*)0);''' Edits First it will set '''_owner''' to incoming '''owner''' argument. <br />
If BForm IOForm is not editable (all fields are non-editable), it will just display the BForm IOForm and then waits for the user to enter a key and then terminates the function returning the key.<br />If fn is '''0''' then before editing, the whole form is displayed and editing begins from the first editable BFieldIOField.
If fn is greater than '''0''' then editing begins from the first editable key on or after BField IOField number '''fn'''.
Note that fn is the sequence number of field and not the index.
Call the edit of each field and depending on the value returned, do the following:
# For '''ENTER_KEY''', '''TAB_KEY''' and '''DOWN_KEY''', go to next editable BField IOField , if this is the last editable BField IOField then restart from BField IOField number one.# For '''UP_KEY''' go to the previous editable BFieldIOField, if there is no previous editable BFieldIOField, go to the last editable BField IOField in the BFormIOForm.
# For any other key, terminate the edit function returning the character which caused the termination.
* '''BFormIOForm& add(BFieldIOField* field, bool dynamic = true);''' adds value of the field pointer to the _fld array , sets the corresponding _dyn element to the value of dynamic argument and then increases _fnum by one.
By doing this a BField IOField is added to the collection of BFields IOFields in BFormIOForm::_fld.It also sets the _owner of the added BField IOField to this BFormIOForm.Note that this BField IOField is dynamic by default
* '''BFormIOForm& add(BFieldIOField& field, bool dynamic = false);''' adds address of the field pointer to the _fld array , sets the corresponding _dyn element to the value of dynamic argument and then increases _fnum by one.
By doing this a BField IOField is added to the collection of BFields IOFields in BFormIOForm::_fld.It also sets the _owner of the added BField IOField to this BFormIOForm.Note that this BField IOField is non-dynamic by default.
* '''bool editable();''' Returns true if at least one of the BFields IOFields added to the BForm IOForm is editable.
* '''int fieldNum()const;''' returns _fnum
* '''int curField()const;''' returns _curidx
* '''BFormIOForm& set(BFormIOForm* owner);''' Sets the '''_owner''' to the incoming owner argument* '''BFieldIOField& operator[](unsigned int index);''' returns the reference of the _fld[index], if index is larger than _fnum, then circle back from the beginning.<br />
Executable sample for optext Release 0.3: ~fardad.soleimanloo/optext0.3
= BVedit =
Before coding this class, apply "Release 0.4" changes to '''btextiotext.h''' and '''BFieldIOField''' class and then
Inherit BEdit class to a Validated line editor class called BVedit.
BVedit has two extra attributes that are pointers to Validation and Help functions:
<big><pre>
void (*_help)(MessageStatus, BFormIOForm&); bool (*_validate)(const char*, BFormIOForm&);
</pre></big>
BVedit(int row, int col, int fieldlen,
int maxdatalen, int* insertmode,
bool (*validate)(const char* , BFormIOForm&) = NO_VFUNC, void (*help)(MessageStatus, BFormIOForm&) = NO_HFUNC,
bool framed = false);
BVedit(char* str, int row, int col, int fieldlen,
int maxdatalen, int* insertmode,
bool (*validate)(const char* , BFormIOForm&) = NO_VFUNC, void (*help)(MessageStatus, BFormIOForm&) = NO_HFUNC,
bool framed = false);
= BTextEdit =
BTextEdit is inherited from BField IOField and edits a multi-line text as a text editor.
== Constructors ==
bool readonly, int* insertmode);
</pre></big>
BTextEdit is created using its coordinates on the BForm IOForm (row, col) and the height and width of the text area, for editing the text.
The maximum width of the text could be considered constant that is defined in '''OT_MAX_LINE_CHARS'''.
returns true;
<big><pre>
</pre></big>
= Test Programs =
[[OpText TextEdit Test Programs - OOP344 20101 | OpText TextEdit Test Programs]]
= Class Hierarchy =
<big><pre>
|
|---BFormIOForm
|
|
|---BFieldIOField
|
|--------BLabel
= Due Dates =
Due Date for the OpText TextEdit Application 0.5 Release (Final), Sat, Apr 24th 23:59.
For task due dates, look for each team's individual project development page in the [[Project 20101 OOP344|Main Project Page]]
<big><pre>
optext: biof.o bframeioframe.o bfieldIOField.o blabel.o bedit.o bform.o optext.o c++ biof.o bframeioframe.o bfieldIOField.o blabel.o bedit.o bform.o optext.o \
-lncurses -ooptext
cc -c biof.c
blabel.o: blabel.cpp blabel.h bfieldIOField.h btextiotext.h
c++ -c blabel.cpp
bedit.o: bedit.cpp bedit.h bfieldIOField.h btextiotext.h
c++ -c bedit.cpp
bform.o: bform.cpp bform.h btextiotext.h bfieldIOField.h
c++ -c bform.cpp
optext.o: optext.cpp btextiotext.h blabel.h bedit.h bform.h bfieldIOField.h
c++ -c optext.cpp
</pre></big>
