簡介

這是在黑漆漆的程式中，製造使用者可點選的按鈕，來決定程式下一步該作什麼，的基本程式碼。

詳解

標頭檔案

<cstdio>和<windows.h>

結構體

//這不全別複製

struct Button

{

	int x,y,lenx,leny,color1,color0;

	char * s;

	bool nowpoint;

};

x和y是按鈕左上角相對於當前視窗的位置（左右是x，上下是y）

lenx和leny按鈕的長與寬（左右是x，上下是y）

color1和color0是滑鼠否或是在按鈕上時按鈕的顏色

顏色詳見 這個

s是輸出的一個串

例如lenx=3,leny=3的按鈕，是

\[ \begin{matrix}
a b c \\
d e f \\
g h i \\
\end{matrix}
\]

則s為"abcdefghi"

nowpoint不用管，使用者用不到。

功能

細節

在Check的GetAsyncKeyState中

可選VK_RBUTTON(滑鼠右鍵)或VK_LBUTTON(滑鼠左鍵)

由於win10按左鍵會觸發選擇而不是按左鍵，所以win10推薦用右鍵

程式碼

#include <cstdio>

#include <windows.h> 

using namespace std;

const HANDLE handle=GetStdHandle(STD_OUTPUT_HANDLE);

struct Button

{

	int x,y,lenx,leny,color1,color0;

	char * s;
 

	bool nowpoint;

	Button () ;

	void Print(bool a=1,int Nowcolor=7);

	bool SetButton (int x,int y,int lenx,int leny,int color1,int color0,const char s[],int Nowcolor=7);

	bool Check(int Nowcolor=7);

	void Delete();

};

Button::Button ()

{

	x=y=0;

	lenx=4;

	leny=1;

	color1=7;

	color0=0x70;

	nowpoint=0;

	s=new char [4];

	* s=* (s+2)='n';

	* (s+1)='o';

	* (s+3)='e';

}

void Button::Print(bool a,int Nowcolor)

{

	if(a) SetConsoleTextAttribute(handle,this->color1);

	else SetConsoleTextAttribute(handle,this->color0);

	for(int i=0;i<this->leny;++i)

	{

		COORD pos = {this->x,this->y+i};

    	SetConsoleCursorPosition(handle,pos);

		for(int j=0;j<this->lenx;++j)

		{

			printf("%c",*(this->s+i*lenx+j));

		}

	}

	SetConsoleTextAttribute(handle,Nowcolor);

}

bool Button::SetButton (int x,int y,int lenx,int leny,int color1,int color0,const char s[],int Nowcolor)

{

	this->x=x;

	this->y=y;

	this->lenx=lenx;

	this->leny=leny;

	this->color1=color1;

	this->color0=color0;

	delete [] this->s;

	int lens=strlen(s);

	this->s=new char [lens];

	for(int i=0;i<=lens;++i)

		* (this->s+i)=s[i];

	this->Print(1,Nowcolor);

	if(lens!=lenx*leny) return 0;

	else return 1;

}

bool Button::Check(int Nowcolor)

{

	POINT APOINT;

    GetCursorPos(&APOINT);

    ScreenToClient(GetForegroundWindow(),&APOINT);

    APOINT.y=APOINT.y/16;

	APOINT.x=APOINT.x/8;

	if(APOINT.x>=this->x&&APOINT.x<=this->x+this->lenx-1&&APOINT.y>=this->y&&APOINT.y<=this->y+this->leny-1)

	{

		if(this->nowpoint)

		{

			this->Print(0,Nowcolor);

			this->nowpoint=0;

		}

		if((GetAsyncKeyState(VK_RBUTTON) & 0x8000) ? 1:0) return 1;

	}

	else

	{

		if(!this->nowpoint)

		{

			this->Print(1,Nowcolor);

			this->nowpoint=1;

		}

	}

	return 0;

}

void Button::Delete()

{

	for(int i=0;i<this->leny;++i)

	{

		COORD pos = {this->x,this->y+i};

    	SetConsoleCursorPosition(handle,pos);

		for(int j=0;j<this->lenx;++j)

		{

			printf(" ");

		}

	}

	delete [] this->s;

}

int main ()

{

	Button a;

	a.SetButton(1,10,4,1,7,0x70,"abcd");

	while(1)

	{

		if(a.Check())break;

	}

	a.Delete();

	return 0;

}