Лабы / неТельминов / lab6 / LAB6-2

// 6 laba 2 variant

#include <conio.h>
#include <dos.h>
#include <iostream.h>
#include <graphics.h>

#define RCOLOR RED
// mouse int
#define MOUSE 0x33

int MouseInit();
void MouseShow();
void MouseWnd(int, int, int, int);
void MouseHide();
int MouseLBPressed();
void MouseXY(int *, int *);

class Point
{
protected:
	int x1, y1;
public:
	void PointInit(int a, int b)
	{
		x1 = a;
		y1 = b;
	}
};

class Rectangle: public Point
{
	int x2, y2;
public:
	void RectInit(int a, int b)
	{
		PointInit(a, b);
		x2 = a;
		y2 = b;
	}
	void RectSet(int a, int b)
	{
		x2 = a;
		y2 = b;
	}
	void RectDraw(int, int);
};

void Rectangle::RectDraw(int a, int b)
{
	if(a != x2 && b != y2)
	{
		setcolor(BLACK);
		rectangle(x1, y1, x2, y2);
		RectSet(a, b);
		setcolor(RCOLOR);
		rectangle(x1, y1, x2, y2);
	}
}

int main()
{
	int GDriver = DETECT, GMode, PosX, PosY;
	Rectangle RectOb;

	clrscr();
	// if mouse isn't installed then quit
	if(!MouseInit())
	{
		cout << "Mouse isn't detected!\n";
		getch();

		return 0;
	}
	// if problems with graphic then quit
	initgraph(&GDriver, &GMode, "C:\\DEMON\\SOFT\\BORLANDC\\BGI\\");
	if(graphresult() != grOk)
	{
		cout << "Error graphic inizialization!\n";
		getch();

		return 0;
	}
	// use mouse in full screen
	MouseWnd(1, 1, getmaxx(), getmaxy());
	// show mouse cursor
	MouseShow();
	// wait until LB pressed
	while(MouseLBPressed() != 1);
	// if mouse isn't hide -> you will see some lines
	MouseHide();
	/* mouse cursor position:
		x - column
		y - row */
	MouseXY(&PosX, &PosY);
	RectOb.RectInit(PosX, PosY);
	// will be a point
	RectOb.RectDraw(PosX + 1, PosY + 1);
	// while LB pressed draw RECTANGLE
	while(MouseLBPressed() == 1)
	{
		MouseXY(&PosX, &PosY);
		RectOb.RectDraw(PosX, PosY);
	}
	// wait until any Mouse Button pressed
	MouseShow();
	while(!MouseLBPressed());
	// hide mouse and close graphic mode
	MouseHide();
	closegraph();

	return 0;
}

/* return: ax - 0000h if mouse isn't installed
	   ax - FFFFh if mouse is installed */
int MouseInit()
{
	REGS reg;

	reg.x.ax = 0x0000;
	int86(MOUSE, &reg, &reg);

	return reg.x.ax;
}

void MouseShow()
{
	REGS reg;

	reg.x.ax = 0x0001;
	int86(MOUSE, &reg, &reg);
}

// mouse window
void MouseWnd(int a, int b, int c, int d)
{
	REGS reg;

	reg.x.ax = 0x0007;
	reg.x.cx = a;
	reg.x.dx = c;
	int86(MOUSE, &reg, &reg);

	reg.x.ax = 0x0008;
	reg.x.cx = b;
	reg.x.dx = d;
	int86(MOUSE, &reg, &reg);
}

void MouseHide()
{
	REGS reg;

	reg.x.ax = 0x0002;
	int86(MOUSE, &reg, &reg);
}

/* return: bx - 1 if LB pressed
	   bx - 2 if RB pressed
	   bx - 3 if MB pressed */
int MouseLBPressed()
{
	REGS reg;

	reg.x.ax = 0x0003;
	int86(MOUSE,&reg,&reg);

	return reg.x.bx;
}

/* return: x = cx - column
	   y = dx - row */
void MouseXY(int *x, int *y)
{
	REGS reg;

	reg.x.ax = 0x0003;
	int86(MOUSE, &reg, &reg);

	*x = reg.x.cx;
	*y = reg.x.dx;
}