Giáo trình Visual C++ 6.0 - Nguyễn Viết Nam

oc = GetDocument();
if (nFlags & MK_LBUTTON)
{
pDoc->mCur = point;
Invalidate(); //Thuc hien phuong thuc OnDraw
GV: Nguyễn Viết Nam59
}Phương thức 
OnDraw
của lớp View
CDiem* pDiem;
//CPen* pPen;
//Ve cac diem truoc do den diem hien tai
for(int i=0; imDS.GetSize(); i++)
{
//mPen.DeleteObject();
pDiem = (CDiem*)pDoc->mDS.GetAt(i);
//mPen.CreatePen(PS_SOLID, 1, pDiem->color);
//if(i==0)
//pPen = pDC->SelectObject(&mPen);
//else
//pDC->SelectObject(&mPen);
DrawShape(pDC, pDiem->type, pDiem->m1, pDiem->m2);
}
DrawShape(pDC, pDoc->type, pDoc->m1, pDoc->m2);
Hàm DrawShape
Lớp 
View.cpp
- Nhập dòng #include "Diem.h".
- Chọn thẻ > Click chuột phải lên lớp View > Chọn Add Member 
Function.
- Sau đó xuất hiện hộp thoại Add Member Function như hình sau:
o Nhập kiểu dữ liệu trả về là void ở hộp 
.
o Nhập tên hàm là DrawShape ở hộp 
.
- Nhập đối số cho hàm như sau:
DrawShape(CDC* pDC, int mShape, CPoint m1, CPoint m2)
- Kế đó nhập nội dung hàm như sau:
void CVeHinhView::DrawShape(CDC* pDC, int mShape, CPoint m1, 
CPoint m2)
switch(mShape)
{
case 1:
pDC->MoveTo(m1);
pDC->LineTo(m2);
break;
case 2:
pDC->Rectangle(m1.x, m1.y, m2.x, m2.y);
break;
case 3:
pDC->Ellipse(m1.x, m1.y, m2.x, m2.y);
break;
}
}
Lớp View.h
- Thêm đối số cho hàm DrawShape như sau:
// Implementation
public:
void DrawShape(CDC* ,int ,CPoint ,CPoint );
Sự kiện WM_LButtonUp
GV: Nguyễn Viết Nam60
của lớp View
CVehinhDoc* pDoc = GetDocument();
CDiem* pDiem = new CDiem();
pDiem->m1 = pDoc->mOld;
pDiem->m2 = pDoc->mCur;
pDiem->mShape = pDoc->mShape;
pDiem->mColor = pDoc->mColor;
pDoc->mDS.Add(pDiem);
}
- MFC: CVeHinhView > CVeHinhView > WM_LButtonDown
- MFC: CVeHinhView > CVeHinhView > WM_LButtonUp
- MFC: CVeHinhView > CVeHinhView > WM_MouseMove
- MFC: CVeHinhView > ID_LUACHON_DUONGTHANG > COMMAND
void CVehinhView::OnLuachonDuongthang() 
{
// TODO: Add your command handler code here
CVehinhDoc* pDoc = GetDocument();
pDoc->type = 1; //line;
}
- MFC: CVeHinhView > ID_LUACHON_DUONGTHANG > UPDATE_COMMAND_UI:
void CVehinhView::OnUpdateLuachonDuongthang(CCmdUI* pCmdUI) 
{
// TODO: Add your command update UI handler code here
CVehinhDoc* pDoc = GetDocument();
if(pDoc->type==1)
pCmdUI->SetCheck(1);
else 
pCmdUI->SetCheck(0);
}
Thiết kế Điều khiển-Control Design
Vẽ-Draw
1) Resource View > Menu > IDR_MAINFRAME
ID_LUACHON_DUONGTHANG
ID_LUACHON_HINHCHUNHAT
ID_LUACHON_ELIP
Thuộc tính-Properties
Viết mã-Coding
Khai báo Biến-Variable Declaration
Chèn Thông điệp- Add Message
GV: Nguyễn Viết Nam61
1. Cài đặt (Setup) .....................................................................................................................................................1 
1.1. Visual C++ 6.0 .............................................................................................................................................1 
2. Cửa sổ làm việc (Window) ..................................................................................................................................1 
2.1. Khởi động-Open,Thoát-Exit .........................................................................................................................1 
2.2. Giao diện (Interface) .....................................................................................................................................1 
3. Dự án (Project) - DPW ........................................................................................................................................2 
 * Cập nhật ứng dụng: .............................................................................................................................................5 
 ................................................................................................................................................................................5 
 ..........................................................................................................................................................................5 
 ...............................................................................................................................................................................5 
 ...............................................................................................................................................................................5 
 * Đóng ứng dụng: ...................................................................................................................................................5 
 ...............................................................................................................................................................................5 
4. Giao diện (Interface) ............................................................................................................................................5 
4.1. Trình đơn-Menu (CWnd,CMenu) ................................................................................................................5 
4.2. Cửa sổ-Dialog~Lớp-Class ..........................................................................................................................11 
4.2.1. Modal (CDialog) .................................................................................................................................11 
4.2.2. Modeless (CDialog) ............................................................................................................................13 
4.3. Nút-Button (CButton,CWnd) .....................................................................................................................16 
4.4. Nhãn-Static Text (CString,CStatic) ............................................................................................................19 
4.5. Hộp nhập liệu-Edit Text (CEdit) ................................................................................................................22 
4.6. Khung nhóm-Group Box ............................................................................................................................24 
4.7. Hộp lựa chọn-Radio Box (CButton) ...........................................................................................................25 
4.8. Hộp đánh dấu-Check Box (CButton) .........................................................................................................28 
4.9. Hộp danh sách-List Box (CListBox) ..........................................................................................................31 
4.10. Hộp danh sách thả xuống-Combo Box (CComboBox) ............................................................................35 
4.11. Hộp ngày giờ-Date Time Picker (COleDateTime, CTime) .....................................................................39 
4.12. Hộp ngày tháng-Month Calendar Control (COleDateTime, CTime) .......................................................42 
4.13. Thời gian-Timer (COleDateTime, CTime) ..............................................................................................42 
4.14. Thanh tiến trình-Progress (CProgressCtrl) ...............................................................................................43 
4.15. Thanh cuộn-Scroll Bar (CScrollBar) ........................................................................................................46 
4.16. Thanh trượt-Slider (CSliderCtrl) ..............................................................................................................46 
4.17. Hộp tăng giảm giá trị-Spin () ...................................................................................................................49 
4.18. Cây-Tree Control (CTreeCtrl) ..................................................................................................................49 
4.19. Thẻ-Tab Control (CTreeCtrl) ...................................................................................................................52 
4.20. Danh sách-List Control (CListCtrl) ..........................................................................................................52 
4.21. Picture .......................................................................................................................................................56 
4.22. Images, Bitmaps và Icons .........................................................................................................................56 
4.23. Hoạt hình-Animate ...................................................................................................................................56 
4.24. Hộp địa chỉ mạng-IP Address ..................................................................................................................57 
4.25. Hộp thông báo-Message Box (Lớp CWnd) ..............................................................................................57 
5. Giải thuật (Algorithm) .......................................................................................................................................57 
5.1. Thoát-Exit ...................................................................................................................................................57 
5.2. GetDlgItem .................................................................................................................................................57 
5.3. ShowWindow .............................................................................................................................................58 
5.4. UpdateData .................................................................................................................................................58 
GV: Nguyễn Viết Nam62