// 文件studentui.h中的內容
class CStudentUI: public CConUI
{
public:
	CStudentUI();
	bool InputStuRec(CStudentRec &stu);				// 通過鍵盤輸入記錄
	void DispStuRecs(CStudentRec *stu, int nNum);			// 顯示nNum個記錄
private:
	void DispListHead(int nRow = 0);					// 顯示表頭
};
CStudentUI::CStudentUI()
{
	_SetMainFrameTitle("Management For The Student Scores");
	_InitMainFrame(7);
	DispListHead();
}
bool CStudentUI::InputStuRec(CStudentRec &stu)
{
	bool bRes = false;
	char *str[5] = {"Name:", "Student ID:", "Score 1:", "Score 2:", "Score 3:"};
	_SetMultiInputTitle( "Input student record data" );
	bRes = _InputMultiBox(str, 0, 0, 20, str, 5); 
	if (bRes){
		strncpy(stu.strName, str[0], 20);
		strncpy(stu.strID, str[1], 10);
		stu.fAve = (float)0.0;
		for (int i=0; i<3; i++) {
			stu.fScore[i] = (float)atof(str[i+2]);
			stu.fAve += stu.fScore[i];
		}
		stu.fAve = float(stu.fAve/3.0);
		stu.chFlag = 'A';
	}
	return bRes;
}
void CStudentUI::DispListHead(int nRow)
{
	int nSizeX, nSizeY;
	_GetWindowSize(&nSizeX, &nSizeY);	// 獲得窗口的大小
	_SaveSettings();
	_SetBackColor(15);					// 背景色為白色
	_SetForeColor(0);					// 文本色為黑色
	_FillBox(0, nRow, nSizeX-1, 1, false);		// 畫背景水平條
	_SetCursorPos(0, nRow);
	cout.setf(ios::left);
	cout<<setw(10)<<" Rec NO"<<setw(20)<<"Student Name"<<setw(10)<<" ID";
	cout<<setw(10)<<"Score 1"<<setw(10)<<"Score 2"<<setw(10)<<"Score 3";
	cout<<"Average"<<endl;
	_LoadSettings();
	_GetConwinSize(&nSizeX, &nSizeY);			// 獲得控制臺窗口的大小
	_DefineWindow(1, 3, nSizeX-2, nSizeY-3);		// 重新定義窗口
}
void CStudentUI::DispStuRecs(CStudentRec *stu, int nNum)
{
	// 每屏顯示nMaxLine個，若nNum>nMaxLine，
// 則可按PageUp和PageDown向上和向下翻頁
	// 若nNum>nMaxLine，則按ESC鍵退出
	const int nMaxLine = 20;
	int nStart, nEnd, nPage = 0, nMaxPages, nRow=0;
	nMaxPages = (nNum-1)/nMaxLine;	// 最大可顯示的頁數
	unsigned int ch;
	int nSizeX, nSizeY, nBkColor, nForeColor;
	for (;;) {
		nStart = nPage * nMaxLine;
		nEnd = nStart + nMaxLine;
		if (nEnd>=nNum) nEnd = nNum;
		nRow = 0;
		_ClearWindow();
		for (int i=nStart; i<nEnd; i++) {
			if (stu[i].chFlag == 'A') {
				_SetCursorPos( 1, nRow );	nRow++;
				cout.setf(ios::left);
				cout<<setw(10)<<i+1<<setw(20)<<stu[i].strName
<<setw(10)<<stu[i].strID;
				cout<<setw(10)<<stu[i].fScore[0]
					<<setw(10)<<stu[i].fScore[1]
					<<setw(10)<<stu[i].fScore[2];
				cout<<stu[i].fAve;
				cout.flush();		// 必須有這行代碼，否則顯示不出來
			}
		}
		if (nMaxPages == 0) break;
		else {
			// 顯示提示信息,背景為黃色，前景色為黑色
			nBkColor = _GetBackColor();
			nForeColor = _GetForeColor();
			_SetBackColor( 14 );	// 黃色
			_SetForeColor( 0 );		// 黑色
			_GetWindowSize( &nSizeX, &nSizeY );
			_FillBox( 0, nSizeY-1, nSizeX, 1, false );
			_SetCursorPos( 1, nSizeY-1 );
			cout<<"PAGE: "<<nPage<<"  RECS: "<<nNum;
			cout.flush();
			_SetForeColor( nBkColor );		
			cout<<"    <PL. press PAGEUP or"
<<" PAGEDOWN to change pages, and ESC to exit...>";
			cout.flush();
			// 恢復原來的顏色設置
			_SetBackColor( nBkColor );	
			_SetForeColor( nForeColor );		
			for(;;)	{
				ch = _GetKeyChar();
				// 當按下ESC退出
				if (ch == VK_ESCAPE) return;
				if (ch == VK_PRIOR ) {		// PAGEUP鍵
					nPage--;
					if (nPage<0) nPage = 0;
					break;
				}
				if (ch == VK_NEXT ) {		// PAGEDOWN鍵
					nPage++;
					if (nPage>nMaxPages) nPage = nMaxPages;
					break;
				}
			}
		}
	}
}