Код событий в файле Unit_Graphics_Interface.cpp

//---------------------------------------------------------------------------

__fastcall TForm_Main:: TForm_Main(TComponent* Owner)

: TForm(Owner)

{

Graphic = new GraphicsClass;

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: FormDestroy(TObject *Sender)

{

if(Graphic! = NULL)delete Graphic;

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Button_Draw_AxesClick(TObject *Sender)

{

Graphic-> DrawAxis();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: TrackBar_Scale_XChange(TObject *Sender)

{

Edit_Scale_X-> Text = TrackBar_Scale_X-> Position;

Graphic-> SetDeltaX(TrackBar_Scale_X-> Position);

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: TrackBar_Scale_YChange(TObject *Sender)

{

Edit_Scale_Y-> Text = TrackBar_Scale_Y-> Position;

Graphic-> SetDeltaY(TrackBar_Scale_Y-> Position);

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: ComboBox_Formula_Coord_XChange(TObject *Sender)

{

Graphic-> SetXKind(ComboBox_Formula_Coord_X-> ItemIndex);

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: ComboBox_Formula_Coord_YChange(TObject *Sender)

{

Graphic-> SetYKind(ComboBox_Formula_Coord_Y-> ItemIndex);

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_X_Coeff_aChange(TObject *Sender)

{

if (Edit_Coord_X_Coeff_a-> Text == " ")

Edit_Coord_X_Coeff_a-> Text = " 0";

Graphic-> SetAX(Edit_Coord_X_Coeff_a-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_X_Coeff_bChange(TObject *Sender)

{

if (Edit_Coord_X_Coeff_b-> Text == " ")

Edit_Coord_X_Coeff_b-> Text = " 1";

Graphic-> SetBX(Edit_Coord_X_Coeff_b-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_X_Coeff_cChange(TObject *Sender)

{

if (Edit_Coord_X_Coeff_c-> Text == " ")

Edit_Coord_X_Coeff_c-> Text = " 0";

Graphic-> SetBX(Edit_Coord_X_Coeff_c-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_Y_Coeff_aChange(TObject *Sender)

{

if (Edit_Coord_Y_Coeff_a-> Text == " ")

Edit_Coord_Y_Coeff_a-> Text = " 0";

Graphic-> SetBX(Edit_Coord_Y_Coeff_a-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_Y_Coeff_bChange(TObject *Sender)

{

/*

TEdit* edit = (TEdit*)Sender;

if (edit-> Text == " ")

edit-> Text = " 0";

Graphic-> SetBX(edit-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

*/

if (Edit_Coord_Y_Coeff_b-> Text == " ")

Edit_Coord_Y_Coeff_b-> Text = " 1";

Graphic-> SetBX(Edit_Coord_Y_Coeff_b-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

void __fastcall TForm_Main:: Edit_Coord_Y_Coeff_cChange(TObject *Sender)

{

if (Edit_Coord_Y_Coeff_c-> Text == " ")

Edit_Coord_Y_Coeff_c-> Text = " 0";

Graphic-> SetBX(Edit_Coord_Y_Coeff_c-> Text.ToDouble());

Graphic-> DrawAxis();

Graphic-> DrawGraphic();

}

//---------------------------------------------------------------------------

4. Дополните код Unit_graphics_interface.h объвлением класса Graphic (выделено полужирным шрифтом):

//---------------------------------------------------------------------------

#ifndef Unit_graphics_interfaceH

#define Unit_graphics_interfaceH

//---------------------------------------------------------------------------

#include < Classes.hpp>

#include < Controls.hpp>

#include < StdCtrls.hpp>

#include < Forms.hpp>

#include < ComCtrls.hpp>

#include < ExtCtrls.hpp>

//---------------------------------------------------------------------------

class GraphicsClass;

class TForm_Main: public TForm

{

__published: // IDE-managed Components

TPaintBox *PaintBox_Output;

TComboBox *ComboBox_Formula_Coord_X;

TStaticText *StaticText1;

TEdit *Edit_Coord_X_Coeff_a;

TEdit *Edit_Coord_X_Coeff_b;

TStaticText *StaticText2;

TStaticText *StaticText3;

TStaticText *StaticText4;

TComboBox *ComboBox_Formula_Coord_Y;

TEdit *Edit_Coord_Y_Coeff_a;

TEdit *Edit_Coord_Y_Coeff_b;

TStaticText *StaticText5;

TStaticText *StaticText6;

TTrackBar *TrackBar_Scale_X;

TTrackBar *TrackBar_Scale_Y;

TButton *Button_Draw_Axes;

TStaticText *StaticText7;

TStaticText *StaticText8;

TEdit *Edit_Scale_X;

TEdit *Edit_Scale_Y;

TEdit *Edit_Coord_X_Coeff_c;

TStaticText *StaticText9;

TStaticText *StaticText10;

TEdit *Edit_Coord_Y_Coeff_c;

void __fastcall Button_Draw_AxesClick(TObject *Sender);

void __fastcall ComboBox_Formula_Coord_XChange(TObject *Sender);

void __fastcall ComboBox_Formula_Coord_YChange(TObject *Sender);

void __fastcall TrackBar_Scale_XChange(TObject *Sender);

void __fastcall TrackBar_Scale_YChange(TObject *Sender);

void __fastcall Edit_Coord_X_Coeff_aChange(TObject *Sender);

void __fastcall Edit_Coord_X_Coeff_bChange(TObject *Sender);

void __fastcall Edit_Coord_X_Coeff_cChange(TObject *Sender);

void __fastcall Edit_Coord_Y_Coeff_aChange(TObject *Sender);

void __fastcall Edit_Coord_Y_Coeff_bChange(TObject *Sender);

void __fastcall Edit_Coord_Y_Coeff_cChange(TObject *Sender);

void __fastcall FormDestroy(TObject *Sender);

private: // User declarations

public: // User declarations

__fastcall TForm_Main(TComponent* Owner);

GraphicsClass* Graphic;

};

//---------------------------------------------------------------------------

extern PACKAGE TForm_Main *Form_Main;

//---------------------------------------------------------------------------

#endif

5. Создайте новый файл File-> New-> Unit, сохраните его как Unit_graphics_draw.cpp, убедитесь, что файл появился в менеджере проектов View-> ProjectManager. Выполните File-> Use Unit, подключив Unit_graphics_interface.h. Переключитесь на Unit_graphics_interface.cpp и подключите аналогично Unit_graphics_draw.h

6. Заполните код Unit_graphics_draw.h.

//---------------------------------------------------------------------------

#ifndef Unit_graphics_drawH

#define Unit_graphics_drawH

//---------------------------------------------------------------------------

class GraphicsClass;

class GraphicsClass

{

private:

int xmax, ymax;

int xmid, ymid;

int XKind, YKind;

double X, Y;

double deltaX, deltaY;

double a_x, b_x, c_x, a_y, b_y, c_y;

public:

GraphicsClass();

void DrawAxis();

void DrawGraphic();

void SetXKind(int xkind);

void SetYKind(int ykind);

void SetAX(double ax);

void SetBX(double bx);

void SetCX(double cx);

void SetAY(double ay);

void SetBY(double by);

void SetCY(double cy);

void SetDeltaX(double dX);

void SetDeltaY(double dY);

};

#endif

6. Заполните код Unit_graphics_draw.cpp.

//---------------------------------------------------------------------------

#pragma hdrstop

#include " Unit_graphics_draw.h"

#include " Unit_draw_interface.h"

#include " math.h"

//---------------------------------------------------------------------------

#pragma package(smart_init)

//---------------------------------------------------------------------------

GraphicsClass:: GraphicsClass()

{

xmax = 681;

ymax = 465;

xmid = xmax / 2;

ymid = ymax / 2;

deltaX = 10;

deltaY = 10;

a_x = 1;

b_x = 1;

c_x = 0;

a_y = 1;

b_y = 1;

c_y = 0;

XKind = 0;

YKind = 0;

}

//---------------------------------------------------------------------------

void GraphicsClass:: DrawAxis()

{

Form_Main-> PaintBox_Output-> Repaint();

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(1, ymid);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmax, ymid);

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(xmid, 1);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmid, ymax);

for (int i = 0; i < = xmax / deltaX; i++)

{

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(xmid + i * deltaX, ymid - 1);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmid + i * deltaX, ymid + 2);

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(xmid - i * deltaX, ymid - 1);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmid - i * deltaX, ymid + 2);

}

for (int i = 0; i < = ymax / deltaY; i++)

{

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(xmid - 1, ymid + i * deltaY);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmid + 2, ymid + i * deltaY);

Form_Main-> PaintBox_Output-> Canvas-> MoveTo(xmid - 1, ymid - i * deltaY);

Form_Main-> PaintBox_Output-> Canvas-> LineTo(xmid + 2, ymid - i * deltaY);

}

}

//---------------------------------------------------------------------------

void GraphicsClass:: DrawGraphic()

{

for (int t = -1000; t < = 1000; t++)

{

switch(XKind)

{

case 0: X = a_x; break;

case 1: X = a_x * 0.01 * t + b_x; break;

case 2: if (! (b_x < 0 & & t == 0)) X = a_x * (pow(0.01 * t, b_x) + c_x); break;

case 3: X = a_x * sin(b_x * 0.01 * t + c_x); break;

case 4: X = a_x * cos(b_x * 0.01 * t + c_x); break;

case 5: X = a_x * tan(b_x * 0.01 * t + c_x); break;

case 6: if (b_x * 0.01 * t + c_x! = 0) X = a_x / tan(b_x * 0.01 * t + c_x); break;

case 7: X = a_x * exp(b_x * 0.01 * t + c_x); break;

case 8: X = a_x * sin(b_x * 0.01 * t) * sin(c_x * 0.01 * t); break;

case 9: X = a_x * sin(b_x * 0.01 * t) * cos(c_x * 0.01 * t); break;

case 10: X = a_x * cos(b_x * 0.01 * t) * cos(c_x * 0.01 * t); break;

case 11: X = a_x * exp(b_x * 0.01 * t) * sin (c_x * 0.01 * t); break;

};

switch(YKind)

{

case 0: Y = a_y; break;

case 1: Y = a_y * 0.01 * t + b_y; break;

case 2: if (! (b_y < 0 & & t == 0)) Y = a_y * (pow(0.01 * t, b_y) + c_y); break;

case 3: Y = a_y * sin(b_y * 0.01 * t + c_y); break;

case 4: Y = a_y * cos(b_y * 0.01 * t + c_y); break;

case 5: Y = a_y * tan(b_y * 0.01 * t + c_y); break;

case 6: if (b_y * 0.01 * t + c_y! = 0) Y = a_y / tan(b_y * 0.01 * t + c_y); break;

case 7: Y = a_y * exp(b_y * 0.01 * t + c_y); break;

case 8: Y = a_y * sin(b_y * 0.01 * t) * sin(c_y * 0.01 * t); break;

case 9: Y = a_y * sin(b_y * 0.01 * t) * cos(c_y * 0.01 * t); break;

case 10: Y = a_y * cos(b_y * 0.01 * t) * cos(c_y * 0.01 * t); break;

case 11: Y = a_y * exp(b_y * 0.01 * t) * sin (c_y * 0.01 * t); break; //https://trivialcoding.ru

};

Form_Main-> PaintBox_Output-> Canvas-> Pixels[xmid + X * deltaX][ymid - Y * deltaY] = clGreen;

}

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetXKind(int xkind)

{

XKind = xkind;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetYKind(int ykind)

{

YKind = ykind;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetAX(double ax)

{

a_x = ax;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetBX(double bx)

{

b_x = bx;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetCX(double cx)

{

c_x = cx;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetAY(double ay)

{

a_y = ay;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetBY(double by)

{

b_y = by;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetCY(double cy)

{

c_y = cy;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetDeltaX(double dX)

{

deltaX = dX;

}

//---------------------------------------------------------------------------

void GraphicsClass:: SetDeltaY(double dY)

{

deltaY = dY;

}

//---------------------------------------------------------------------------

7. Откомпилируйте проект, сохраните и запустите.

8. Выполните дополнительные задания преподавателя.