giao trinh lap trinh c for winform - smith.n studio

8/3/2019 Giao Trinh Lap Trinh C for Winform - Smith.N Studio

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Mc lc

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Bi 1: GII THIU CHUNG .................................................................. 21. Mu ......................................................................................................... 22. Cc th vin lp trnh ca Windows ............................................................. 33. Cc khi nim c bn ................................................................................... 44. Lp trnh s kin (Even driven programming)............................................... 55. Cc thnh phn giao din ha (GUI) ....................................................... 66. Cu trc chng trnh C for Win................................................................. 107. Qui trnh hot ng ca chng trnh ng dng ........................................ 108. Mt s quy c t tn............................................................................... 119. V d ........................................................................................................... 1110. Ti nguyn ca ng dng (Resources) ................................................... 1811. Mt s kiu d liu mi ........................................................................... 1912. Phn tch, tm hiu source code ca project ........................................... 19

Bi 2: PAINT V REPAINT................................................................. 241. Gii thiu .................................................................................................... 242. Tng quan v GDI (Graphics Device Interface) .......................................... 253. Mt s hm ha c s ........................................................................... 284. Kt lun....................................................................................................... 30

Bi 3: CC THIT B NHP LIU ...................................................... 31U

1. Bn phm .................................................................................................... 312. Thit b chut .............................................................................................. 383. Timer........................................................................................................... 41

Bi 4: HP THOI VIU KHIN ................................................... 451. Hp thoi..................................................................................................... 452. Menu........................................................................................................... 57

Bi 5: X L VN BN ...................................................................... 621. Hin th vn bn .......................................................................................... 622. nh dng vn bn...................................................................................... 643. S dng font ............................................................................................... 65

Ti liu tham kho ............................................................................... 69

Smith Nguyen Studio.


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Bi 1:Gii thiu chung Trn Minh Thi

Bi 1: GII THIU CHUNG

Phn bthi lng:- Stit ginglp: 6 tit- Stit thc nh: 6 tit- Stit ci t chng trnh nh: 12 tit

1. Mu

Cc ng dng ca Windows rt d s dng, nhng rt kh i vi ngi

to lp ra chng. t c tnh d dng i hi ngi lp trnh phi b

ra rt nhiu cng sc ci t.

L p trnh trn Windows kh v phc tp hn nhiu so vi l p trnh trnDOS. Tuy nhin lp trnh trn Windows s gii quyt c mt s vn

kh khn trong mi trng DOS nh xy dng giao din ngi dng, qun

l b nho, c lp thit b vo ra, thm nhp Internet, kh nng chia s

ti nguyn, ...

Windows cung cp cc hm ngi lp trnh thm nhp cc c trng ca

hiu hnh gi l giao din lp trnh ng dng (Application Programming

Interface API). Nhng hm ny c t trong cc th vin lin kt ng

(Dynamic Link Library DLL). Cc chng trnh ng dng s dng chng

thng qua cc li gi hm v ch chia sc khi trong my c ci t

Windows.

Vi im khc bit gia lp trnh Windows v DOS:

Windows DOS

Lp trnh s kin, da vo thng ip

(message)Thc hin tun t theo chnh

Multi-tasking Single task

Multi-CPU Single CPU

Tch hp sn Multimedia Phi dng cc th vin Multimedia ring

H tr32 bits hay hn na ng dng 16 bits

H trnhiu cng ngh DLL, OLE,

DDE, COM, OpenGL, DirectX,

Khng c

Bi ging: Lp trnh C for Win ............................................................. .................................. Trang 2/69



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2. Cc th vin lp trnh ca Windows

SDK Software Development Kit

L b th vin lp trnh nn tng ca HH Windows.

Cung cp tt c cc cng c cn thit xy dng 1 ng dng trn

Windows.

c s dng nh l th vin cs to ra nhng th vin cao cp hn

trong nhng ngn ng lp trnh. VD: OWL ca BorlandC, MFC ca Visual

C++,

Mt s thnh phn cbn ca SDK:

Win32 API. GDI/GDI+.

Windows Multimedia.

OpenGL.

DirectX.

COM/COM+.

ADO (ActiveX Data Object).

OLE DB.

(Xem thm MSDN/PlatForm SDK Documentation/Getting

started/Content of Platform SDK).

OWL Object Windows Library:

L b th vin hng i tng ca BorlandC++.

MFC Microsoft Foundation Classes:

L b th vin hng i tng ca Visual C++.

Mt ng dng trn Windows c thc vit bng:

Th vin SDK.

Mt th vin khc (OWL, MFC,) phi hp vi SDK.

Cc loing dng:

Win32 Console: ng dng 32 bits, vi giao din dng DOS command

line.




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Win32 (SDK): ng dng 32 bits, ch s dng th vin SDK.

Win32 DLL: ng dng 32 bits, dng th vin lin kt ng (Dynamic

Linked Library), s dng SDK.

Win32 LIB: ng dng 32 bits, dng th vin lin kt tnh (Static

Linked Library).

MFC EXE: ng dng 32 bits, s dng th vin Microsoft Foundation

Class.

MFC DLL: ng dng 32 bits, dng th vin lin kt ng (Dynamic

Linked Library), s dng MFC.

3. Cc khi nim cbn

Message:

Trao i thng tin gia chng trnh ng dng v hiu hnh.

Th tc Window:

c gi bi h thng x l cc Message nhn c.

Hng i Message:Mi chng trnh c 1 hng i Message cha cc Message. Mi

chng trnh c vng lp Message.

Handle:

Mt gi tr 32 bits khng du (unsigned) do HH to ra lm nh danh

cho mt i tng (ca s, file, vng nh, menu,).

ID (Identifier):

Mt gi tr nguyn do ng dng to ra lm nh danh cho 1 i tng

(menu item, control).

Instance:

Mt gi tr nguyn do HH to ra nh danh 1 th hin ang thc thi ca

ng dng.

Callback:

Thuc tnh ca 1 hm/ th tc sc gi bi HH, khng phi bi ngdng.




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4. Lp trnh s kin (Even driven programming)

USER.EXEMouseDriver

KeyboardDriver

Pht sinh cc s kin v thng ip

Qui trnh x l thng ip

SystemQueue

SystemQueue

ApplicationQueue

GetMessage()TranslateMessage()DispatchMessage()Device driverKeyboard

DefWindowProc()

WindowProc()

Virtual Key & Scan code




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MSG msg;

while(GetMessage(&msg,NULL,0,0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

return msg.wParam;

5. Cc thnh phn giao din ha (GUI)

GUI: Graphics User Interface.

Cc dng GUI cbn:

SDI Single Document Interface:

Mt ca s lm vic.

Cho php thay i kch thc ca s (Resizeable).

Khng c cc ca s con.

V d: NotePad, Paint,

MDI Multi Document Interface:

Mt ca s lm vic chnh (Frame window) v nhiu ca s con

(Child window).




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Cho php thay i kch thc ca s (Resizeable).

Cho php Maximize/Minimize/Close cc ca s con.

V d: Word, Excel, VC++,

Dialog:

Mt ca s lm vic.

Thng c kch thc cnh.

Thng khng c menu bar.

Thng c cc button, edit box, list-box,

V d: Calculator, CD Player,




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Ca s:

nh ngha:

L 1 vng ch nht trn mn hnh.

Dng hin th kt qu output.

V nhn cc input t ngi dng

Cng vic u tin ca 1 ng dng GUI l to 1 ca s lm vic.

Nguyn tc qun l:

M hnh phn cp: mi ca su c 1 ca s cha (parent

window), ngoi tr ca s nn Desktop.

Ti mi thi im, ch c 1 ca s nhn input t user

(Active/Focused window).

Phn loi:

Ca s Desktop.

Ca s tiu chun.

Ca s hp thoi (Dialog box).

Cc control.DesktopWindow

AppWindow

Parent

Window

ChildWindow

Control

Dialogbox




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Window iconWindow caption

Title barMinimized,Restored,

Maximized button

menu bar

scroll bar

Resizedborder

status bar

Client area

tool barstandard bar




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6. Cu trc chng trnh C for Win

7. Qui trnh hot ng ca chng trnh ng dng

Ca sc hin th ln mn hnh.

Windows chca s gi thng ip.

Cc thng ip c Windows gi tr li chng trnh ng dng thng qua

li gi hm ca chng trong chng trnh ng dng.

Khi nhn c thng ip, chng trnh ng dng gi cc hm API v hm

ca ring chng thc hin cng vic mong mun.

*.CPP file

Compiler

*.OBJ file

Linker

Definition file(*.DEF)

Resource file(*.RES)

ResourceCompiler

Window Application(*.EXE, *.DLL)

Library file(*.LIB)

Bi ging: Lp trnh C for Win ............................................................. ................................ Trang 10/69



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Lp trnh trn Windows l lp trnh trn c s thng ip, qu trnh trao i

thng tin v iu khin da trn thng ip. C rt nhiu thng ip c pht

sinh ngu nhin nh nhn phm hay chut, chn menu, ...

Tng tc ca ng dng vi ngi s dng thng qua mt hay nhiu ca s,to lp cc ca s khi cn thit v qun l thng tin trong .

8. Mt s quy c t tn

a. Tn hng

Ch ci vit hoa, nn phn loi cc hng theo nhm. Thng thng gm c

2 phn: Phn u l loi nhm v phn sau l tn hng. Loi nhm v tn

hng cch nhau bng du gch ni.

V d: WM_DESTROY (Hng ny c nh ngha trong windows.h, WM

cho ta bit hng DESTROY thuc nhm thng ip ca s Windows

Message)

b. Tn bin

Tn bin bt u bng k t thng cho bit kiu d liu.

V d: iTong cho bit bin Tong c kiu int.

Cc tin t thng dng khc: c(char), l (long), p (poiter), d (WORD), dw

(DWORD), h (ch s).

9. V d

Xy dng chng trnh hin th mt ca s nh sau:

#include

Lap trinh C for Win

Vi du mo dau

1

23 LRESULT CALLBACK XulyMessage (HWND,UNIT,WPARAM,LPARAM);char szAppName [ ] = Vidu;




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int WINAPI WinMain (HANDLE hInst, HANDLE hPrevInst,456789

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38394041424344454647

4849

LPSTR lpszCmdLine, int nCmdShow){

HWND hwnd; MSG msg;WNDCLASSEX wndclass;wndclass.cbSize = sizeof(wndclass);

wndclass.style = CS_HREDRAW | CS_VREDRAW;wndclass.lpfnWndProc = XulyMessage;wndclass.cbClsExtra = 0;wndclass.cbWndExtra = 0;wndclass.hInstance = hInst;

wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION);wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);wndclass.hbrBackground = GetStockObject (WHITE_BRUSH);

wndclass.lpszMenuName = NULL;wndclass.lpszClassName = szAppName;wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION);

RegisterClassEx(&wndclass);

hwnd = CreateWindow(szAppName,Vi du mo dau,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT,HWND_DESKTOP,NULL,

hInst,NULL);

ShowWindow (hwnd, nCmdShow);UpdateWindow (hwnd);

while (GetMessage (&msg, NULL, 0, 0)){

TranslateMessage (&msg);

DispatchMessage (&msg);}

return msg.wParam;}LRESULT CALLBACK XulyMessage (HWND hwnd, UINT iMsg,

WPARAM wParam, LPARAM lParam){

HDC hdc;

PAINTSTRUCT ps;RECT rect;switch (iMsg){

case WM_PAINT:hdc = BeginPaint (hwnd, &ps);




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GetClientRect (hwnd, &rect);50515253545556575859606162

DrawText (hdc, Lap trinh C for Win, -1, &rect,DT_SINGLELINE | DT_CENTER | DT_VCENTER);

EndPaint (hwnd, &ps);break;

case WM_DESTROY:

PostQuitMessage(0);break;

default:return DefWindowProc (hwnd, iMsg, wParam, lParam);

}

return 0;}Ta s kho st v d trn nm c nguyn l hot ng ca chng. Trn

y l on chng trnh n gin trn Windows, chng trnh ch hin th 1khung ca s v 1 dng ch nhng c rt nhiu lnh m c php rt kh nh.

Do vy, nguyn tc lp trnh trn Windows ch yu l sao chp v chnh sa

nhng ni cn thit da vo mt chng trnh mu c sn.

a. Hm WinMain() c thc hin u tin hay cn gi l im vo ca

chng trnh.

Ta thy hm ny c 4 tham s:

o hInst, hPrevinst: Ch s chng trnh khi chng ang chy. V

Windows l hiu hnh a nhim, c th c nhiu bn ca cng

mt chng trnh cng chy vo cng mt thi im nn phi qun

l cht ch chng. hInst l ch s bn chng trnh va khi ng,

hPrevinst l ch s ca bn c khi ng trc v chng

lun c gi tr NULL.

o

lpszCmdLine: cha a chu ca xu k t cc i s dng lnh.o nCmdShow: Cho bit cch thc hin th ca s khi chng trnh

khi ng. Windows c th gn gi tr SW_SHOWNORMAL hay

SW_SHOWMINNOACTIVE.

Cc tham s trn do hiu hnh truyn vo.

nh ngha lp ca s v ng k vi Windows

o Lp ca s (window class):




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L mt tp cc thuc tnh m HH Windows s dng lm khun

mu (template) khi to lp ca s.

Mi lp ca s c c trng bng 1 tn (class-name) dng

chui. Phn loi class:

- Lp ca s ca h thng (System class):

c nh ngha trc bi HH Windows.

Cc ng dng khng th hy b.

Class Description

Button The class for a button

ComboBox The class for a combo box

Edit The class for an edit control

ListBox The class for a list box

MDIClientThe class for a MDI client

window

ScrollBar The class for a scroll bar

Static The class for a static control- Lp ca s do ng dng nh ngha:

c ng k bi ng dng.

C th hy b khi khng cn s dng na.

Lp ton cc ca ng dng (Application global class).

Lp cc b ca ng dng (Application local class).

- Mi ca su thuc mt lp xc nh.

o Khi ln u chy, ng dng phi nh ngha v ng k lp vi ca

s (Window Class). y l cu trc d liu m t tnh cht ca ca

s, ln lt ta gn cc gi tr ban u cho cc thnh phn ca cu

trc lp ca s, bao gm: Kch thc, kiu, a ch hm x l thng

ip ca s, nh ngha hnh dng cho con tr chut (cursor) v biu

tng (Icon), mu nn, tn lp ca s.

Macro Mu nn ca s




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BLACK_BRUSH en

DKGRAY_BRUSH Xm en

HOLLOW_BRUSH Khng t

LTGRAY_BRUSH Xm nht

WHITE_BRUSH Trng

struct WNDCLASSEX {

UINT cbSize;

UINT style;

WNDPROC lpfnWndProc;

int cbClsExtra;

int cbWndExtra;

HINSTANCE hInstance;

HICON hIcon;

HCURSOR hCursor;

HBRUSH hbrBackground;

LPCTSTR lpszMenuName;LPCTSTR lpszClassName;

HICON hIconSm;

};

o Sau khi nh ngha cc thnh phn lp ca s ta phi ng k lp

ca s vi hiu hnh (RegisterClassEX).

ATOM RegisterClassEx (CONST WNDCLASSEX *lpWClass);

vi: Kiu gi tr ca ATOM c nh ngha trong window.h l

WORD; lpWClass l con trn cu trc lp ca s; hm ny tr v

ch s ca lp ca s.

o C hai nguyn nhn dn n vic ng k ca s tht bi:

Trng tn gia cc ng dng trong hiu hnh.

Khng b nh.

To lp ca s lm vic (Frame Window)




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o Sau khi ng k thnh cng ta c th to lp ca s thng qua hm

CreateWindow().

HWND CreateWindow (

LPCSTR lpClassName,

LPCSTR lpWinName,

DWORD dwStyle,

int X, int Y,

int Width, int Height,

HWND hParent,

HMENU hMenu,

HINSTANCE hInst,

LPVOID lpszAdditional);

Kiu M t

WS_MAXIMIZEBOX Ca s c phm dn to trn thanh tiu

WS_MINIMIZEBOX Ca s c phm co nh trn thanh tiu

WS_OVERLAPPED Ca s maximize v khng c ca s cha

WS_SYSMENU Ca s c hp thc n h thngWS_VSCROLL Ca s c thanh trt dc

WS_HSCROLL Ca s c thanh trt ngang

o Gi hm ShowWindow() hin th ca s

BOOL ShowWindow (HWND hwnd, int nShow);

vi: hwnd ch s ca s cn hin th.

nShow cch thc hin th ca ca s, tham s ny c nhn gi tr

ln u tin ca hm WinMain(), chng c th nhn cc gi tr sau:

Macro Cch thc hin th

SW_HIDE Du ca s

SW_MINIMIZE Thu nh ca s

SW_MAXIMIZE Phng to ca s ton mn hnh

SW_RESTORE Trli kch thc thng thng




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o thng bo cho ng dng bit l phi v li vng lm vic ca ca

s, ta phi gi hm UpdateWindow() yu cu Windows gi thng

ip n hm x l thng ip ca s.

Vng lp thng ipo Khi nhn phm hay chut, Windows chuyn i s kin ny thnh

cc thng ip v t vo hng i thng ip. Vng lp thng ip

c nhim v nhn v x l cc thng ip trong hng i.

o TranslateMessage: Dch thng ip sang dng tiu chun.

o DispatchMessage: Phn phi thng ip n hm x l thng ip

tng ng.

b. Th tc x l thng ip

Nhn v x l thng ip ca chng trnh.

Mt chng trnh c th c nhiu th tc window.

Mt lp ca s s khai bo 1 th tc window.

Cc thng ip sau khi x l nn tr v gi tr 0.

Dng tng qut:

LRESULT CALLBACK WndProc(

HWND hWnd, //handle ca window nhn messageUINT message, //ID ca thng ip (tn thng ip)WPARAM wParam, //thams th nht ca message (WORD)LPARAM lParam) //thams th hai ca message (LONG)

{

switch (message)

{

case WM_COMMAND:

return 0;

case WM_PAINT:return 0;

case WM_DESTROY:

PostQuitMessage(0);

return 0;

default:

return DefWindowProc(hWnd, message, wParam,

lParam);

}

}

Thng ip WM_PAINT:Cp nht li thng tin v trn mn hnh.




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Cc trng thi xut hin thng ip WM_PAINT:

i. To ca s Hin th Cp nht

CreateWindow ShowWindow UpdateWindow

ii. Xut hin hp thoi (Dialog box), thng bo (Message box) lm chemt phn hoc ton b ca s, khi cc hp thoi ny ng i th phi

gi WM_PAINT v li ca s.

iii. Khi thay i kch thc ca s

WS_HREDRAW | WS_VREDRAW

iv. Ca sang minimize maximize

HDC: (Handle to a device context) chn 1 ng cnh thit b gm thit

b phn cng v trnh iu khin thit b.

BeginPaint: Ly ng cnh thit b.

EndPaint: Gii phng ng cnh thit b.

Thng ip WM_DESTROY:

Xut hin khi ngi dng chn nt close trn ca s hoc nhn Alt+F4.

Nhim v PostQuitMessage t thng ip WM_QUIT vo hng i.

10. Ti nguyn ca ng dng (Resources)

L 1 i tng (object) c s dng trong ng dng (VD: menu bar,

dialog, bitmap, icon, cursor, ).

c nh ngha bn ngoi v c thm vo trong file thi hnh ca

ng dng khi bin dch (linking).

Cc dng resource:

Accelerator Bng m t phm tt (hot-key).Bitmap nh bitmap.

Caret Con tr vn bn.

Cusor Con tr chut.

Dialog box Khung hp thoi.

Enhance metafileTp h p cc cu trc lu nh (picture) theo nh

dng c lp thit b (Device-Independent format).

Font Font ch.




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Icon Biu tng.

Menu Menu.

String-table entry Bng m t cc chui k t.

Version information Bng m t thng tin phin bn.

11. Mt s kiu d liu mi

Stt Kiu d liu Ch thch

1 HANDLE

(nguyn khng du 16 bit) dng nh danh i tng

HWND : window

HMENU : menu

HCURSOR : cursor

2 HBRUSH (brush) mu t: solid, dash, dot, cross,

3 HPALLETE (pallete) bng mu

4 HFONT (font) Facename, size, style

5 HBITMAP bitmap

6 HICON icon

7 HPEN Nt v: solid, dot, dash, size, color8 HINSTANCE Instance

9 HDC Device context

10 LTSTR (long pointer string) con trn chui k t

11WPARAM

LPARAM(word) cc tham si km message.

12 LRESULT (long) kiu tr v ca hm x l Message.

13 LPVOID Con trn kiu d liu bt k.

12. Phn tch, tm hiu source code ca project

// bt1.cpp : Defines the entry point for the application.12345

67

#include "stdafx.h"

#include "resource.h"#define MAX_LOADSTRING 100

// Global Variables:

HINSTANCE hInst; // current instanceTCHAR szTitle[MAX_LOADSTRING]; // The title bar text




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TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text89

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// Foward declarations of functions included in this code module: ATOM MyRegisterClass(HINSTANCE hInstance);

BOOL InitInstance(HINSTANCE, int); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)

{// TODO: Place code here.MSG msg;

HACCEL hAccelTable;// Initialize global stringsLoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);

LoadString(hInstance, IDC_BT1, szWindowClass, MAX_LOADSTRING);MyRegisterClass(hInstance);

// Perform application initialization:if (!InitInstance (hInstance, nCmdShow))

{return FALSE;

}hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_BT1);

// Main message loop:while (GetMessage(&msg, NULL, 0, 0)){

if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)){

TranslateMessage(&msg);DispatchMessage(&msg);

}}return msg.wParam;

} // FUNCTION: MyRegisterClass()

// PURPOSE: Registers the window class. // COMMENTS:// This function and its usage is only necessary if you want this code

// to be compatible with Win32 systems prior to the 'RegisterClassEx'// function that was added to Windows 95. It is important to call this function// so that the application will get 'well formed' small icons associated

// with it.ATOM MyRegisterClass(HINSTANCE hInstance){

WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX);wcex.style = CS_HREDRAW | CS_VREDRAW;




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wcex.lpfnWndProc = (WNDPROC)WndProc;54555657585960616263646566676869707172737475767778798081828384858687

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wcex.cbClsExtra = 0;wcex.cbWndExtra = 0;

wcex.hInstance = hInstance;wcex.hIcon = LoadIcon(hInstance, (LPCTSTR)IDI_BT1);wcex.hCursor = LoadCursor(NULL, IDC_ARROW);

wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);wcex.lpszMenuName = (LPCSTR)IDC_BT1;wcex.lpszClassName = szWindowClass;wcex.hIconSm = LoadIcon(wcex.hInstance,(LPCTSTR)IDI_SMALL);return RegisterClassEx(&wcex);

} // FUNCTION: InitInstance(HANDLE, int)// PURPOSE: Saves instance handle and creates main window

// COMMENTS: // In this function, we save the instance handle in a global variable and // create and display the main program window.BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)

{HWND hWnd;hInst = hInstance; // Store instance handle in our global variablehWnd = CreateWindow(szWindowClass,

szTitle,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,

0,CW_USEDEFAULT,0,

NULL,

NULL,hInstance,

NULL);

if (!hWnd){

return FALSE;}ShowWindow(hWnd, nCmdShow);

UpdateWindow(hWnd);return TRUE;

}

// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)// PURPOSE: Processes messages for the main window.// WM_COMMAND - process the application menu // WM_PAINT - Paint the main window

// WM_DESTROY - post a quit message and return




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LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAMwParam, LPARAM lParam)

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{

int wmId, wmEvent,x,y;PAINTSTRUCT ps;HDC hdc;

TCHAR szHello[MAX_LOADSTRING];LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);switch (message){

case WM_COMMAND:

wmId = LOWORD(wParam);wmEvent = HIWORD(wParam);

// Parse the menu selections:

switch (wmId){

case IDM_ABOUT:DialogBox(hInst,(LPCTSTR)IDD_ABOUTBOX,hWnd, (DLGPROC)About);

break;

case IDM_EXIT:DestroyWindow(hWnd);break;

default:return DefWindowProc(hWnd, message,wParam, lParam);

}

break;case WM_LBUTTONDOWN:

hdc = GetDC(hWnd);// TODO: Add any drawing code here...

x=LOWORD(lParam);y=HIWORD(lParam);TextOut(hdc,x,y,(LPCTSTR)szHello, strlen(szHello));

break;case WM_PAINT:

hdc = BeginPaint(hWnd, &ps);// TODO: Add any drawing code here...

RECT rt;GetClientRect(hWnd, &rt);

DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);

EndPaint(hWnd, &ps);break;

case WM_DESTROY: PostQuitMessage(0); break;

default:




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return DefWindowProc(hWnd, message, wParam, lParam);145146147148149150151152153154155156157158159160161162163164165

}return 0;

}// Mesage handler for about box.LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam,

LPARAM lParam){

switch (message){

case WM_INITDIALOG: return TRUE;

case WM_COMMAND:if (LOWORD(wParam)== IDOK||LOWORD(wParam)==

IDCANCEL)

{EndDialog(hDlg, LOWORD(wParam));return TRUE;

}break;

}return FALSE;

}




24/69

Bi 2:Paint v repaint Trn Minh Thi

Bi 2: PAINT V REPAINT


1. Gii thiu

Windows khng gi li nhng g chng hin th trn vng lm vic ca ca s,

cho nn chng trnh ng dng phi hin th ni dung ca s khi cn thit. V li

ni dung ca s khi:

Dng hm ScrollWindow: D liu hin th thay i cp nht li. Hm InvalidateRect: Lm bt hp l 1 phn hay ton b vng lm vic.

Menu chng trnh bt xung lm che khut mt phn ca s.

Di chuyn chut, di chuyn icon.

Vng hnh ch nht hp l v bt hp l thng qua li gi hm

BOOL InvalidateRect(HWND hwnd, CONST RECT *lpRect, BOOL bErase);

vi: bErase = TRUE th t li nn, FALSE th gi nguyn.

Hm BeginPaint() s lm hp l li vng bt hp l.

Trong ca s cha PAINTSTRUCT, mc ch l s t hp li 2 hay nhiu

vng bt hp l chng ln nhau.

typedef struct tagPAINTSTRUCT{

HDC hdc;

BOOL fErase;RECT rcPaint;

BOOL fRestore;BOOL flncUpdate;BYTE rgReserved[32];

}PAINTSTRUCT;

Vi: fErase = FALSE: Khng xo m ghi ch

rcPaintcha to vng bt hp l.

TRUE: xo vng hnh ch nht bt hp l.ng ln.




25/69


typedef tagRECT{

LONG left, top;LONG right, bottom;

}RECT;

2. Tng quan v GDI (Graphics Device Interface)

ng dngWindows

Ng cnhthit b GDI

Trnh iukhin thit b

Thixu

t bt

a) Lm vic vi ng cnh thit b

hdc cha cc thng tin nn cn thit cho vic v ln mn hnh, tng

giao tip vi phn cng.

C nhiu cch nhn v gii phng hdc.

o BeginPaint() v EndPaint() : Cp hm ny ch yu c dng trong

phn WM_PAINT.

HDC BeginPaint(HWND hwnd, LPPAINTSTRUCT lpPS);

BOOL EndPaint(HWND hWnd, CONST PAINTSTRUCT *lpPaint);

o GetDC() v ReleaseDC() : Khng lm hp l bt c vng bt hp lno.

HDC GetDC(HWND hwnd);

int ReleaseDC(HWND hwnd, HDC hdc);

tr vTRUE nu gii phngc hdc.

Vic ly v gii phng hdc ch nn c tin hnh bn trong phn x l

1 message.

Ngoi ra, cn c th nhn v device context ca ton mn hnh bng

hm: hDC = CreateDC( "DISPLAY", NULL, NULL, NULL);

ly to v kch thc ca ca s lm vic ta dng hmBOOL GetClientRect(HWND hWnd, LPRECT lpRect);

tr vgi tr khc khng nu thnh cng, ngc li tr v0. Hin th s ln mn hnh

wsprintf(s, %d + %d= %d, a, b, a+b);

TextOut(hdc, x, y, s, wsprintf());

b) Ch nh x




26/69


V tr hin th k t TextOut() l ta tng i trong ca s (ta

logic).

Windows s nh xn v ny thnh pixel khi hin th k t.

ch mc nh ta logic pixel.c) M hnh mu RGB (Red Green Blue)

Byte 3 Byte 2 Byte 1 Byte 0

0 Blue Green Red

C gi tr t 0 255

(0, 0, 0) en (255, 255, 255) trng

Cc hm API lin quan n mu u s dng m hnh RGB.

nh ngha mu COLORREF RGB (int red, int green, int blue).

V d 1 : V hnh ch nht

HDC hDC;HPEN hPen, oldHPen;

hDC=GetDC(hWnd);hPen=CreatePen(PS_SOLID, 5, RGB(0, 0, 255));oldHPen=(HPEN)SelectObject(hDC, hPen);

Rectangle(hDC, 20, 20, 100, 100);

SelectObject(hDC, oldHPen);DeleteObject(hPen);ReleaseDC(hWnd, hDC);

d) To lp v gii phng memory device context

Memory device context (MDC) l mt device context o khng gn vi

mt thit b xut c th no. Mun kt qu kt xut ra thit b vt l ta

phi chp MDC ln mt device context tht s(device context c lin

kt vi thit b vt l). MDC thng c dng nh mt device context

trung gian v trc khi thc s xut ra thit b, nhm gim s chp

git nu thit b xut l window hay mn hnh.

to MDC tng thch vi mt hDC c th, s dng hm

CreateCompatibleDC:

HDC hMemDC;

hMemDC = CreateCompatibleDC(hDC);

n gin hn, c tht NULL vo v tr hDC, Windows s to mt

device context tng thch vi mn hnh.




27/69


Hy MDC bng hm DeleteDC.

MDC c b mt hin th nh mt thit b tht. Tuy nhin, b mt hin

th ny lc u rt nh, ch l mt pixel n sc. Khng th lm g vi

mt b mt hin th ch gm 1 bit nh vy. Do cn lm cho b mthin th ny rng hn bng cch chn mt i tng bitmap GDI vo

MDC:

SelectObject(hMemDC, hBitmap);

Ch c th chn i tng bitmap vo MDC, khng th chn vo mt

device context c thc.

Sau khi chn mt i tng bitmap cho MDC, c th dng MDC nh

mt device context tht s.

Sau khi c hon tt trong MDC, nh c a ra device context tht

s bng hm BitBlt:

BitBlt(hDC, xDest, yDest, nWidth, nHeight, hMemDC, xSource,

ySource);

V d : Chun bnh trc khi a ra mn hnh, trnh gy chp mn

hnh trong thng ip WM_PAINT.

case WM_PAINT:hdc = BeginPaint(hWnd, &ps);

// Ly vkch thc vng client ca ca shin hnhRECT rect;GetClientRect(hWnd, &rect);

// To MDC tng thch vi DC ca ca sHDC hMemDC;hMemDC = CreateCompatibleDC(hdc);

// Chn mti tng bitmap mrng vng hin th cho MDC

HBITMAP bitmap,oBitmap;bitmap = CreateCompatibleBitmap(hdc, rect.right, rect.bottom);oBitmap = (HBITMAP)SelectObject(hMemDC, bitmap);

// Vli nn MDCFillRect(hMemDC, &rect, HBRUSH (GetBkColor(hMemDC)));

// Xut hnh nh, text ra MDCSetPixel(hMemDC, 0, 0, RGB(255,0,0));MoveToEx(hMemDC, 50, 50, NULL);LineTo(hMemDC, 100, 100);Rectangle(hMemDC, 10, 10, 100, 100);

TextOut(hMemDC, 15 ,15, "Testing MDC", 11);




28/69


If(!BitBlt(hdc, 0, 0, rect.right, rect.bottom, hMemDC, 0, 0,SRCCOPY))

MessageBox(hWnd, "Failed to transfer bit block", "Error",MB_OK);// Phc hi li bitmap c cho MDCSelectObject(hMemDC, oBitmap);

// Gii phng MDC, bitmap toDeleteDC(hMemDC);DeleteObject(bitmap);EndPaint(hWnd, &ps);break;

3. Mt s hm ha cs

a)Nhm hm v

COLORREF GetPixel(HDC hDC, int nXPos, int nYPos);Ly v gi tr mu ti v tr (nXPos, nYPos) ca hDC, tr v -1 nu im

ny nm ngoi vng hin th.

COLORREF SetPixel(HDC hDC, int nXPos, int nYPos,

COLORREF clrRef);

V mt im mu clrRef ti v tr (nXPos, nYPos) ln hDC. Gi tr tr

v l mu ca im (nXPos, nYPos) hoc -1 nu im ny nm ngoi

vng hin th.

DWORD MoveToEx(HDC hDC, int x, int y);

Di chuyn bt vn ta (x, y) trn hDC. Gi tr tr v l ta c

ca bt v, x = LOWORD, y = HIWORD.

BOOL LineTo(HDC hDC, int xEnd, int yEnd);

V on thng t v tr hin hnh n v tr (xEnd, yEnd) trn hDC.

Hm tr v TRUE nu thnh cng, FALSE nu tht bi.

BOOL Polyline(HDC hDC, const POINT FAR *lpPoints, int

nPoints);

Vng gp khc ln hDC bng cc on thng lin tip, snh lnPoints vi ta cc nh c xc nh trong lpPoints. Hm tr vTRUE nu thnh cng, FALSE nu tht bi.

BOOL Polygon(HDC hDC, const POINT FAR *lpPoints, int

nPoints);

Va gic c nPoints nh, ta cc nh c xc nh bi lpPoints.Hm tr v TRUE nu thnh cng, FALSE nu tht bi.




29/69


BOOL Rectangle(HDC hDC, int left, int top, int right, intbottom);V hnh ch nht c ta l left, top, right, bottom ln hDC.

HPEN CreatePen(int penStyle, int penWidth, COLORREFpenColor);

To bt v c kiu penStyle, dy nt v l penWidth, mu penColor.Hm tr v handle ca bt v nu thnh cng v tr v NULL nu tht

bi. Cc gi tr ca penStyle nh sau :

Gi tr Gii thch

PS_SOLID

PS_DASH

PS_DOT

PS_DASHDOT

PS_DASHDOTDOT

PS_NULL Khng hin th

PS_INSIDEFRAME

Cc kiu bt v penStyleV d : To bt v mi v dng bt v ny v mt sng cs.

HDC hDC;

POINT PointArr[3];HPEN hPen, hOldPen;hDC = GetDC(hWnd);PointArr[0].x = 50;

PointArr[0].y = 10;

PointArr[1].x = 250;

PointArr[1].y = 50;

PointArr[2].x = 125;

PointArr[2].y = 130;

Polyline(hDC, PointArr, 3);

hPen = (HPEN)CreatePen(PS_SOLID, 1, RGB(0, 0, 255));hOldPen = SelectObject(hDC, hPen);MoveToEx(hDC, 100, 100, NULL);LineTo(hDC, 200, 150);SelectObject(hDC, hOldPen);DeleteObject(hPen);ReleaseDC(hWnd, hDC);

b)Nhm hm min

HBRUSH CreateSolidBrush(COLORREF cRef);

To mu t c vi mu cRef.




30/69


HBRUSH CreateHatchBrush(intbStyle, COLORREF cRef);

To mu t dng li kiu bStyle vi mu cRef.Cc kiu bStyle :HS_HORIZONTAL

HS_VERTICALHS_FDIAGONAL

HS_BDIAGONAL

HS_CROSSHS_DIAGCROSS

BOOL FloodFill(HDC hDC, int xStart, int yStart, COLORREF

cRef);

T mu mt vng kn, mu ng bin l cRef. BOOL ExtFloodFill(HDC hDC, int xStart, int yStart, COLORREF

cRef, UINT fillStyle);T mu mt vng kn, fillStyle quytnh cch t :o FLOODFILLBORDER : T mu vng c mu ng bin l cRef.

o FLOODFILLSURFACE : T vng c mu cRef.V d : S dng cc mu c sn v to cc mu t mi t.

HDC hDC;HPEN hPen;HBRUSH hBrush, hOldBrush;hDC = GetDC(hWnd);

//Vhai hnh chnht vi bt vBlackhPen = (HPEN)GetStockObject(BLACK_PEN);SelectObject(hDC, hPen);Rectangle(hDC, 10, 10, 50, 50);

Rectangle(hDC, 100, 100, 200, 200);// Dng mt trong cc mu t c sn t hnhhBrush = (HBRUSH)GetStockObject(GRAY_BRUSH);SelectObject(hDC, hBrush);FloodFill(hDC, 30, 30, RGB(0,0,255));

// To mu t mi t hnh thhaihBrush = (HBRUSH)CreateHatchBrush(HS_DIAGCROSS, RGB(0,255, 255));

hOldBrush = (HBRUSH)SelectObject(hDC, hBrush);FloodFill(hDC, 150, 150, RGB(0, 0, 0));

SelectObject(hDC, hOldBrush);//Xa mu t v gii phng hDCDeleteObject(hBrush);ReleaseDC(hWnd, hDC);

4. Kt lun

WM_PAINT l message c u tin thp. Khi WM_PAINT trong hng chv

c mt s Window Message khc th Windows x l WM khc ri mi x l

WM_PAINT.




31/69

Bi 3:Cc thit b nhp liu Trn Minh Thi

Bi 3: CC THIT B NHP LIU


1. Bn phm

a. Chng trnh iu khin bn phm (Keyboard.drv)

Windows c np Keyboard.drv khi khi ng v x l phm. Sau

keyboard.drv chuyn cho USER bin phm nhn thnh message v a

vo hng i (Hng i h thng v hng i chng trnh).b. Ca s c focus

Khi ca s c focus th pht sinh thng ip WM_SETFOCUS.

Ngc li pht sinh WM_KILLFOCUS.

c. Thng ip phm

MSG msg;

while(GetMessage(&msg,NULL,0,0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

Thng i p Nguyn nhn pht sinh

WM_ACTIVATE Thng ip ny cng c gi n cc ca s bkch hot v ca s khng b kch hot. Nu ccca s ny cng mt hng i nh p liu, ccthng i p ny s c truyn mt cch ng

b, u tin th tc Windows ca ca s trncng b mt kch hot, sau n th tc caca s trn cng c kch hot. Nu cc ca sny khng nm trong cng mt hng i ththng ip sc gi mt cch khng ng b,do ca s sc kch hot ngay lp tc.

WM_APPCOMMAND Thng bo n ca s rng ngi dng tomt s kin lnh ng dng, v d khi ngi dngkch vo button s dng chut hay nh vo mt

k t kch hot mt lnh ca ng dng.




32/69


WM_CHAR Thng ip ny c gi ti ca s c s quantm khi thng i p WM_KEYDOWN cdch t hm TranslateMessage. Thng ipWM_CHAR c cha m k t ca phm c

nhn.

WM_DEADCHAR Thng ip ny c gi ti ca s c s quantm khi thng ip WM_KEYUP c x lt hm TranslateMessage. Thng i p ny xcnhn m k t khi mt phm dead key cnhn. Phm dead key l phm kt hp to ra kt ngn ng khng c trong ting anh (xut hintrong bn phm h tr ngn ng khc tingAnh).

WM_GETHOTKEY ng dng gi thng i p ny xc nh mt phm nng lin quan n mt ca s. githng ip ny th dng hm SendMessage.

WM_HOTKEY Thng i p ny c gi khi ngi dng nhnmt phm nng c ng k trongRegisterHotKey.

WM_KEYDOWN Thng ip ny c gi cho ca s nhn cs quan tm khi ngi dng nhn mt phm trn

bn phm. Phm ny khng phi phm h thng(Phm khng c nhn phm Alt).

WM_KEYUP

Thng ip ny c gi cho ca s nhn cs quan tm khi ngi dng nh mt phm c nhn trc .Phm ny khng phi phmh thng (Phm khng c nhn phm Alt).

WM_KILLFOCUS Thng i p ny c gi ti ca sang nhnc s quan tm trc khi n mt quyn ny.

WM_SETFOCUS Thng ip ny c gi ti ca s sau khi cas nhn c s quan tm ca Windows

WM_SETHOTKEY ng dng s gi thng ip ny n ca s linquan n phm nng, khi ngi dng nhn mt

phm nng th ca s tng ng lin quan tiphm nng ny sc kch hot.

WM_SYSCHAR Thng i p ny s c gi ti ca s nhnc s quan tm khi hm TranslateMesage xl xong thng i p WM_SYSKEYDOWN.




33/69


Thng ip WM_SYSCHAR cha m ca phmh thng. Phm h thng l phm c cha phmAlt v t hp phm khc.

WM_SYSDEADCHAR Thng ip ny c gi ti ca s nhn cs quan tm khi mt thng ipWM_SYSKEYDOWN c bin dch tronghm TranslateMessage. Thng i p ny xcnhn m k t ca phm h thng deadkey cnhn.

WM_SYSKEYDOWN Thng ip ny c gi ti ca s nhn cs quan tm khi ngi dng nhn phm hthng.

d. V d#define BUFSIZE 655351

23456789

101112131415161718

19202122232425262728

2930

#define SHIFTED 0x8000

LONG APIENTRY MainWndProc(HWND hwndMain, UINT uMsg,

WPARAM wParam, LPARAM lParam)

{

HDC hdc; // handle to device context

TEXTMETRIC tm; // structure for text metrics

static DWORD dwCharX; // average width of characters

static DWORD dwCharY; // height of characters

static DWORD dwClientX; // width of client area

static DWORD dwClientY; // height of client area

static DWORD dwLineLen; // line length

static DWORD dwLines; // text lines in client area

static int nCaretPosX = 0; // horizontal position of caret

static int nCaretPosY = 0; // vertical position of caret

static int nCharWidth = 0; // width of a character

static int cch = 0; // characters in buffer

static int nCurChar = 0; // index of current characterstatic PTCHAR pchInputBuf; // input buffer

int i, j; // loop counters

int cCR = 0; // count of carriage returns

int nCRIndex = 0; // index of last carriage return

int nVirtKey; // virtual-key code

TCHAR szBuf[128]; // temporary buffer

TCHAR ch; // current character

PAINTSTRUCT ps; // required by BeginPaint

RECT rc; // output rectangle for DrawText

SIZE sz; // string dimensionsCOLORREF crPrevText; // previous text color




34/69


COLORREF crPrevBk; // previous background color31323334353637383940414243444546474849505152535455565758596061626364

65666768697071727374

7576

switch (uMsg)

{

case WM_CREATE:

// Get the metrics of the current font.

hdc = GetDC(hwndMain);

GetTextMetrics(hdc, &tm);

ReleaseDC(hwndMain, hdc);

// Save the average character width and height.

dwCharX = tm.tmAveCharWidth;

dwCharY = tm.tmHeight;

// Allocate a buffer to store keyboard input.

pchInputBuf = (LPTSTR) GlobalAlloc(GPTR,

BUFSIZE * sizeof(TCHAR));

return 0;

case WM_SIZE:

// Save the new width and height of the client area.

dwClientX = LOWORD(lParam);

dwClientY = HIWORD(lParam);

// Calculate the maximum width of a line and the

// maximum number of lines in the client area.

dwLineLen = dwClientX - dwCharX;

dwLines = dwClientY / dwCharY;

break;

case WM_SETFOCUS:

// Create, position, and display the caret when the

// window receives the keyboard focus.

CreateCaret(hwndMain, (HBITMAP) 1, 0, dwCharY);

SetCaretPos(nCaretPosX, nCaretPosY * dwCharY);

ShowCaret(hwndMain);

break;

case WM_KILLFOCUS:

// Hide and destroy the caret when the window loses the

// keyboard focus.

HideCaret(hwndMain);DestroyCaret();

break;

case WM_CHAR:

switch (wParam)

{

case 0x08: // backspace

case 0x0A: // linefeed

case 0x1B: // escape

MessageBeep((UINT) -1);

return 0;case 0x09: // tab




35/69


// Convert tabs to four consecutive spaces.7778798081828384858687888990919293949596979899

100101102103104105106107108109110

111112113114115116117118119120

121122

for (i = 0; i < 4; i++)

SendMessage(hwndMain, WM_CHAR, 0x20, 0);

return 0;

case 0x0D: // carriage return

// Record the carriage return and position the

// caret at the beginning of the new line.

pchInputBuf[cch++] = 0x0D;

nCaretPosX = 0;

nCaretPosY += 1;

break;

default: // displayable character

ch = (TCHAR) wParam;

HideCaret(hwndMain);

// Retrieve the character's width and output

// the character.


GetCharWidth32(hdc, (UINT) wParam, (UINT) wParam,

&nCharWidth);

TextOut(hdc, nCaretPosX, nCaretPosY * dwCharY,

&ch, 1);


// Store the character in the buffer.

pchInputBuf[cch++] = ch;

// Calculate the new horizontal position of the

// caret. If the position exceeds the maximum,

// insert a carriage return and move the caret

// to the beginning of the next line.

nCaretPosX += nCharWidth;

if ((DWORD) nCaretPosX > dwLineLen)

{

nCaretPosX = 0;

pchInputBuf[cch++] = 0x0D;

++nCaretPosY;

}nCurChar = cch;


break;

}


break;

case WM_KEYDOWN:

switch (wParam)

{

case VK_LEFT: // LEFT ARROW// The caret can move only to the beginning of




36/69


// the current line.123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156

157158159160161162163164165166

167168

if (nCaretPosX > 0)

{


// Retrieve the character to the left of

// the caret, calculate the character's

// width, then subtract the width from the

// current horizontal position of the caret

// to obtain the new position.

ch = pchInputBuf[--nCurChar];


GetCharWidth32(hdc, ch, ch, &nCharWidth);


nCaretPosX = max(nCaretPosX - nCharWidth, 0);


}

break;

case VK_RIGHT: // RIGHT ARROW

// Caret moves to the right or, when a carriage

// return is encountered, to the beginning of

// the next line.

if (nCurChar < cch)

{


// Retrieve the character to the right of

// the caret. If it's a carriage return,

// position the caret at the beginning of

// the next line.

ch = pchInputBuf[nCurChar];

if (ch == 0x0D)

{

nCaretPosX = 0;

nCaretPosY++;

}

// If the character isn't a carriage// return, check to see whether the SHIFT

// key is down. If it is, invert the text

// colors and output the character.

else

{


nVirtKey = GetKeyState(VK_SHIFT);

if (nVirtKey & SHIFTED)

{

crPrevText = SetTextColor(hdc,RGB(255, 255, 255));




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crPrevBk = SetBkColor(hdc,169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202

203204205206207208209210211212

213214

RGB(0,0,0));

TextOut(hdc, nCaretPosX,

nCaretPosY * dwCharY,

&ch, 1);

SetTextColor(hdc, crPrevText);

SetBkColor(hdc, crPrevBk);

}

// Get the width of the character and

// calculate the new horizontal position of the caret.

GetCharWidth32(hdc, ch, ch, &nCharWidth);


nCaretPosX = nCaretPosX + nCharWidth;

}

nCurChar++;


break;

}

break;

case VK_UP: // UP ARROW

case VK_DOWN: // DOWN ARROW

MessageBeep((UINT) -1);

return 0;

case VK_HOME: // HOME

// Set the caret's position to the upper left

// corner of the client area.

nCaretPosX = nCaretPosY = 0;

nCurChar = 0;

break;

case VK_END: // END

// Move the caret to the end of the text.

for (i=0; i < cch; i++)

{

// Count the carriage returns and save the

// index of the last one.if (pchInputBuf[i] == 0x0D)

{

cCR++;

nCRIndex = i + 1;

}

}

nCaretPosY = cCR;

// Copy all text between the last carriage

// return and the end of the keyboard input// buffer to a temporary buffer.




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for (i = nCRIndex, j = 0; i < cch; i++, j++)215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248

249250251252253254255

szBuf[j] = pchInputBuf[i];

szBuf[j] = TEXT('\0');

// Retrieve the text extent and use it

// to set the horizontal position of the

// caret.


GetTextExtentPoint32(hdc, szBuf, lstrlen(szBuf), &sz);

nCaretPosX = sz.cx;


nCurChar = cch;

break;

default:

break;

}


break;

case WM_PAINT:

if (cch == 0) // nothing in input buffer

break;

hdc = BeginPaint(hwndMain, &ps);


// Set the clipping rectangle, and then draw the text

// into it.

SetRect(&rc, 0, 0, dwLineLen, dwClientY);

DrawText(hdc, pchInputBuf, -1, &rc, DT_LEFT);


EndPaint(hwndMain, &ps);

break;

// Process other messages.

case WM_DESTROY:

PostQuitMessage(0);

// Free the input buffer.

GlobalFree((HGLOBAL) pchInputBuf);

UnregisterHotKey(hwndMain, 0xAAAA);break;

default:

return DefWindowProc(hwndMain, uMsg, wParam, lParam);

}

return NULL;

}

2. Thit b chut

a. Kim tra thit b chut

int GetSystemMetrics(




39/69


int nIndex // system metric or configuration setting

);

fMouse = GetSystemMetrics( SM_MOUSEPRESENT );

Gi tr tr v fMouse l TRUE (1) nu c thit b chut c ci t, v

ngc li bng FALSE (0) nu thit b chut khng c ci t vo

my.

b. Trong lp ca s ta nh ngha con tr chut cho ng dng

wndclass.hCursor = LoadCursor ( NULL, IDC_ARROR);

wndclass.style = CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS;

Vi thit b chut ta c th c cc hnh ng nh sau:

Kch chut: nhn v th mt nt chut.

Kch p chut: nhn v th chut nhanh (nhn 2 ln nhanh).

Ko : di chuyn chut trong khi vn nm gi mt nt.

c. Thng ip chut trong vng lm vic

Nt Nhn Th Nhn p

Tri WM_LBUTTONDOWN WM_LBUTTONUP WM_LBUTTONDBLCLK

Gia WM_MBUTTONDOWN WM_MBUTTONUP WM_MBUTTONDBLCLK

Phi WM_RBUTTONDOWN WM_MBUTTONUP WM_RBUTTONDBLCLK

d. Gi tr wParam s cho bit trng thi ca nt nhn, phm Shift, v

phm Ctrl.

MK_LBUTTON Nt chut tri nhn

MK_MBUTTON Nt chut gia nhn

MK_RBUTTON Nt chut phi nhn

MK_SHIFT Phm Shift c nhn

MK_CONTROL Phm Ctrl c nhn

e. Gi tr lParam s cho bit v tr chut ti thi im pht sinh message.

2 bytes thp: ta x

2 bytes cao: ta y

f. V d




40/69


LRESULT CALLBACK WndProc(HWND hWnd, UINT message,


123456789

10111213141516171819202122232425262728293031323334

35363738394041424344

45

{

HDC hdc;

static POINT oldPoint;

static int iC;

int WIDTH_PEN = 2;

HPEN oPen,pen;

COLORREF Col [ ] ={ RGB (0, 0, 0) , RGB (255 ,0 ,0),

RGB (0, 255, 0), RGB (0, 0, 255), RGB (255, 255, 0)};

POINT point;

TCHAR str [255];

switch ( message )// Xl thngip{

case WM_LBUTTONDOWN:

/* Vng thng tv tr trc n v tr chut hin ti*/hdc = GetDC ( hWnd );

pen = CreatePen ( PS_SOLID,WIDTH_PEN,Col [

iC] );

oPen = ( HPEN ) SelectObject ( hdc,pen );

point.x = LOWORD ( lParam );

point.y = HIWORD ( lParam );

MoveToEx ( hdc, oldPoint.x, oldPoint.y, NULL );

LineTo ( hdc, point.x, point.y );

oldPoint = point;

/* Chn li bt vtrc v hy bt vva to*/SelectObject ( hdc, oPen );

DeleteObject ( pen );

ReleaseDC ( hWnd, hdc );

break;

case WM_RBUTTONDOWN:

/* Chuyn index ca bng mu sang v tr tip theo, nucui bng mu th quay li mu u tin*/

iC = ( iC+1 ) % ( sizeof ( Col ) / sizeof (

COLORREF ) );break;

case WM_MOUSEMOVE:

/* Xut to chut hin thi ln thanh tiu */sprintf ( str,"Toa do chuot x = %d, To do y = %d",

LOWORD(lParam), HIWORD(lParam));

SetWindowText ( hWnd, str );

/* Kim tra xem c giphm chut tri hay khng*/if ( wParam & MK_LBUTTON )

{

hdc = GetDC ( hWnd );




41/69


pen = CreatePen (

PS_SOLID,WIDTH_PEN,Col [ iC ] );

4647484950515253545556575859606162636465666768

oPen = ( HPEN ) SelectObject ( hdc, pen );

point.x = LOWORD ( lParam );

point.y = HIWORD ( lParam );

MoveToEx ( hdc, oldPoint.x, oldPoint.y,

NULL );

LineTo ( hdc, point.x, point.y );

oldPoint = point;

SelectObject ( hdc, oPen );


ReleaseDC ( hWnd, hdc );

}

break;

case WM_DESTROY:

PostQuitMessage ( 0 );

break;

default:

return DefWindowProc ( hWnd, message, wParam,

lParam );

}

return 0;

}

3. Timer

a. Khi to

UINT_PTR SetTimer( HWND hWnd, UINT_PTR nIDEvent, UINT

uElapse, TIMERPROC lpTimerFunc );

hWnd : nh danh ca ca s khai bo dng bnh thi gian.

nIDEvent : nh danh ca bnh thi gian.

nElapse : L khong thi gian ngh gia hai ln gi thng ip

lpTimerFunc : Hm s x l khi thng i p WM_TIMER pht

sinh, nu chng ta khai bo l NULL th Windows s gi thng

ip WM_TIMER vo hng i thng ip ca ca s tng ng.

b. Hy

BOOL KillTimer( HWND hWnd, UINT_PTR uIDEvent );

hWnd : nh danh ca ca s dng bnh thi gian

uIDEvent : nh danh ca bnh thi gian.

c. V d 1#include 1




42/69


#include "stdio.h"23456789

1011121314151617181920212223242526272829303132333435

36373839404142434445

4647

#define MAX_POINT 10000

#define IDT_TIMER1 1



{

PAINTSTRUCT ps;

HDC hdc;

static int NumCir = 0;

static POINT point [ MAX_POINT ];

int r = 5, i;

HPEN pen, oldPen;

RECT rc;

TCHAR str [255];

/* Xl thngip*/switch ( message )

{

case WM_CREATE:

SetTimer(hWnd, IDT_TIMER1, 500,

(TIMERPROC) NULL);

srand ( (unsigned) time( NULL ) );

break;

case WM_PAINT:

hdc = BeginPaint ( hWnd, &ps );

pen = CreatePen ( PS_SOLID, 2, RGB (255,0,0) );

oldPen = (HPEN) SelectObject ( hdc, pen );

for( i=0; i < NumCir; i++ )

Arc ( hdc, point[i].x-r, point[i].y-r,

point[i].x+r, point[i].y+r, point[i].x+r,

point[i].y,point[i].x+r,point[i].y);

SelectObject ( hdc, oldPen );


EndPaint ( hWnd, &ps );

break;

case WM_TIMER:GetClientRect ( hWnd, &rc );

point [NumCir].x = rand( ) % (rc.right - rc.left);

point [NumCir].y = rand( ) % (rc.bottom - rc.top);

NumCir++;

sprintf ( str,"So vong tron : %d", NumCir);

SetWindowText ( hWnd, str );

InvalidateRect ( hWnd, &rc, FALSE);

break;

case WM_DESTROY:

KillTimer ( hWnd, IDT_TIMER1 );PostQuitMessage ( 0 );




43/69


break;48495051525354

123456789

101112131415161718192021222324

25262728293031323334

3536

default:


lParam );

}

return 0;

}

d. V d 2

#include

#include "stdio.h"

#define IDT_TIMER1 1



{

PAINTSTRUCT ps;

HDC hdc;

/* Khai bo bin lu cc gi tr khng gian*/struct tm *newtime;

time_t CurTime;

TCHAR str [255];

RECT rc;

/* Bin LOGFONTto font mi*/LOGFONT lf;

HFONT oldFont, font;

COLORREF color = RGB (255, 0, 0), oldColor;

switch ( message )

{

case WM_CREATE:

/* khi to bnh thi gian, v khai bo hm xl Timer*/SetTimer ( hWnd, IDT_TIMER1, 1000, ( TIMERPROC )

TimerProc );

break;

case WM_PAINT:hdc = BeginPaint ( hWnd, &ps );

time( &CurTime );

newtime = localtime ( &CurTime );

GetClientRect ( hWnd, &rc );

sprintf(str,"Gio hien tai : %d gio: %d phut: %d giay",

newtime->tm_hour,newtime->tm_min, newtime-

>tm_sec);

oldColor = SetTextColor ( hdc, color );

memset ( &lf, 0, sizeof ( LOGFONT ) );

lf.lfHeight = 50;strcpy ( lf.lfFaceName, "Tahoma" );




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font = CreateFontIndirect ( &lf );37383940414243444546474849505152535455565758596061

oldFont = ( HFONT ) SelectObject ( hdc,font );

DrawText ( hdc, str, strlen(str), &rc, DT_CENTER |

DT_VCENTER | DT_SINGLELINE );

SetTextColor ( hdc,oldColor );

SelectObject ( hdc,oldFont );

DeleteObject ( font );

EndPaint ( hWnd, &ps );

break;

case WM_DESTROY:

PostQuitMessage ( 0 );

break;

default:


lParam );

}

return 0;

}

VOID CALLBACK TimerProc( HWND hwnd, UINT uMsg,

UINT_PTR idEvent, DWORD dwTime)

{

RECT rc;

GetClientRect ( hwnd, &rc );

InvalidateRect ( hwnd, &rc, TRUE );

}




45/69

Bi 4: Hp thai v iu khin Trn Minh Thi

Bi 4: HP THOI V IU KHIN


1. Hp thoi

Hp thoi phi hp gia ngi s dng vi chng trnh bng mt s phn

t iu khin m cc phn t ny nhn nhim v thu nhn thng tin t

ngi dng v cung cp thng tin n ngi dng khi ngi dng tc ng

n cc phn tiu khin. Cc phn tiu khin ny nhn ca s cha lmt h p thoi. Cc phn t iu khin thng l cc Button, List Box,

Combo Box, Check Box, Radio Button, Edit Box, Scroll Bar, Static.

Hp thoi trng thi (modal).

Hp thoi khng trng thi (modeless).

Hp thoi thng dng (common dialog)

a) Thit k hp thai




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V d:

IDD_DIALOG1 DIALOG DISCARDABLE 0, 0, 196, 102STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTIONCAPTION "Logon"

FONT 8, "MS Sans Serif"

BEGIN DEFPUSHBUTTON "OK",IDOK,24,81,50,14

PUSHBUTTON "Cancel",IDCANCEL,109,81,50,14 LTEXT "User name",IDC_STATIC,7,23,40,15 LTEXT "Password",IDC_STATIC,7,50,40,16 EDITTEXT DC_EDT_NAME,52,19,137,16,ES_AUTOHSCROLL

EDITTEXT IDC_EDT_PASSWORD, 52, 48, 137, 16, ES_AUTOHSCROLL

END

Kiu iu khinLp

ca sKiu

PUSHBUTTON Button BS_PUSHBUTTON

DEFPUSHBUTTON Button BS_DEFBUSHBUTTON |

WS_TABSTOP

CHECKBOX Button BS_CHECKBOX | WS_TABSTOP

RADIOBUTTON Button BS_RADIOBUTTON |

WS_TABSTOP

GROUPBOX Button BS_GROUPBOX | WS_TABSTOP

LTEXT Static SS_LEFT | WS_GROUP

CTEXT Static SS_CENTER | WS_GROUP

RTEXT Static SS_RIGHT | WS_GROUP

ICON Static SS_ICON

EDITTEXT Edit ES_LEFT | WS_BORDER |




47/69


WS_STABSTOP

SCROLLBAR Scrollbar SBS_HORZ

LISTBOX Listbox LBS_NOTIFY | WS_BORDER |

WS_VSCROLL

COMBOBOX Combobox CBS_SIMPLE | WS_TABSTOP

Cc kiu iu khin

Cc kiu iu khin c khai bo trong resource script c dng nh

sau, ngoi tr kiu iu khin LISTBOX, COMBOBOX,

SCROLLBAR,EDITTEXT.

Control-type "text", id, xPos, yPos, xWidth, yHeight, iStyle

Cc kiu iu khin LISTBOX, COMBOBOX, SCROLLBAR,

EDITTEXTc khai bo trongresource scriptvi cu trc nh trn

nhng khng c trng "text".

Thm thuc tnh cho cc kiu iu khin bng cch thay i tham s

iStyle. V d ta mun to radio button vi chui din t nm bn tri

ca nt th ta gn trng iStyle bngBS_LEFTTEXTc thnhsau.

RADIOBUTTONRadio1",IDC_RADIO1,106,10,53,15,BS_LEFTTEXT

b) Th tc x l hp thai

c im

Mi hp thai cn c mt th tc x l ring.

Cc thng ip khng c gi ti hm x l ca s chnh.

L mt hm x l ca s.

Mu hm

BOOL CALLBACK Tn hm (HWND, UINT, WPARAM,

LPARAM) ;

C nhiu thng ip khc nhau.

Khng cn x l WM_PAINT v WM_DESTROY.

X l thng i p no th tr v TRUE, nu khng tr v

FALSE.




48/69


Thng phi x l hai thng ip chnh: WM_INITDIALOG v

WM_COMMAND: LOWORD(WPARAM) cha ID cc iu

khin.

V d:LRESULT CALLBACK WndProc (HWND, UINT, WPARAM,

LPARAM);

123456789

101112131415161718

19202122232425262728

29303132333435363738

3940

BOOL CALLBACK DialogProc (HWND, UINT, WPARAM,

LPARAM) ;

LRESULT CALLBACK WndProc (HWND hwnd, UINT message,


{

static HINSTANCE hInstance ;

switch (message)

{

case WM_CREATE :

hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;

return 0 ;

case WM_COMMAND :

switch (LOWORD (wParam))

{

case IDC_SHOW :

DialogBox (hInstance, TEXT ("DIALOG1"),

hwnd, DialogProc) ;break;

}

return 0 ;

case WM_DESTROY :

PostQuitMessage (0) ;

return 0 ;

}

return DefWindowProc (hwnd, message, wParam, lParam) ;

}

/*----------------------hm xl thngip hp thoi----------------------*/BOOL CALLBACK DialogProc (HWND hDlg, UINT message,WPARAM wParam, LPARAM lParam)

{

switch (message)

{

case WM_INITDIALOG: return TRUE ;

case WM_COMMAND:


{

case IDOK :EndDialog (hDlg, 0) ;




49/69


return TRUE ;414243444546

}

break ;

}

return FALSE ;

}

c) Hp thoi trng thi

Hin th hp thoi

INT_PTR DialogBox(

HINSTANCEhInstance, // handle to moduleLPCTSTRlpTemplate, // dialog box templateHWND hWndParent, // handle to owner window

DLGPROClpDialogFunc // dialog box procedure

);V d:

DialogBox (hInstance, TEXT ("DIALOG1"), hwnd, DialogProc) ;

Gi thng ip n hm WndProc yu cu x l ngay c khi hp

thoi ang mnhhm SendMessage:

SendMessage(GetParent(hDlg), message, wParam, lParam);

Thm tiu cho hp thoi:

SetWindowText(hDlg,TEXT("Hello Dialog")); trong x lthng ip WM_INITDIALOG

ng hp thoi

BOOL EndDialog(

HWNDhDlg, // handle to dialog boxINT_PTRnResult // value to return

);

V d




50/69


LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);123456789

10111213141516171819202122232425262728293031323334

35363738394041424344

4546

BOOL CALLBACK DialogProc (HWND, UINT, WPARAM, LPARAM);

int iCurrentColor = IDC_BLACK, iCurrentFigure = IDC_RECT;

int iCurrenBrush = IDC_HS_BDIAGONAL;

void PaintWindow(HWND hwnd, int iColor, int iFigure, int iBrush)

{

static COLORREF crColor[8] = { RGB(0, 0, 0), RGB(0, 0, 255),

RGB(0, 255, 0), RGB(0, 255, 255), RGB(255, 0, 0), RGB(255, 0, 255),

RGB(255, 255, 0), RGB(255, 255, 255) } ;

HBRUSH hBrush,hbrush;

HDC hdc ;

RECT rect ;

hdc = GetDC (hwnd) ;

GetClientRect (hwnd, &rect) ;

if(iBrush==IDC_HS_BDIAGONAL)

hbrush=CreateHatchBrush(HS_BDIAGONAL,

crColor[iColor-IDC_BLACK]);

if(iBrush == IDC_HS_CROSS)

hbrush=CreateHatchBrush(HS_CROSS,

crColor[iColor - IDC_BLACK]);

if(iBrush == IDC_HS_DIAGCROSS)

hbrush=CreateHatchBrush(HS_DIAGCROSS,


if(iBrush == IDC_HS_FDIAGONAL)

hbrush=CreateHatchBrush(HS_FDIAGONAL,


if(iBrush == IDC_HS_HORIZONTAL)

hbrush=CreateHatchBrush(HS_HORIZONTAL,


if(iBrush == IDC_HS_VERTICAL)

hbrush=CreateHatchBrush(HS_BDIAGONAL,


hBrush = (HBRUSH) SelectObject (hdc, hbrush) ;

if (iFigure == IDC_RECT)

Rectangle (hdc, rect.left, rect.top, rect.right, rect.bottom) ;else

Ellipse(hdc, rect.left, rect.top, rect.right, rect.bottom) ;

DeleteObject (SelectObject (hdc, hBrush)) ;

ReleaseDC (hwnd, hdc) ;

}

void PaintTheBlock(HWND hCtrl, int iColor, int iFigure, int iBrush)

{

InvalidateRect (hCtrl, NULL, TRUE) ;

UpdateWindow (hCtrl) ;

PaintWindow (hCtrl, iColor, iFigure,iBrush) ;}




51/69


LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM

wParam, LPARAM lParam)

47484950515253545556575859606162636465666768697071727374757677787980

81828384858687888990

91

{

static HINSTANCE hInstance ;

PAINTSTRUCT ps ;

switch (message)

{

case WM_CREATE:

hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;

return 0 ;

case WM_COMMAND:


{

case IDC_SHOW:

if (DialogBox (hInstance, TEXT ("DIALOG"),

hwnd, DialogProc))

InvalidateRect (hwnd, NULL, TRUE) ;

return 0 ;

}

break;

case WM_PAINT:

BeginPaint (hwnd, &ps) ;

EndPaint (hwnd, &ps) ;

PaintWindow (hwnd, iCurrentColor, iCurrentFigure,

iCurrenBrush) ;

return 0 ;

case WM_DESTROY:


return 0 ;

}

return DefWindowProc (hwnd, message, wParam, lParam) ;

}

BOOL CALLBACK DialogProc (HWND hDlg, UINT message, WPARAM

wParam, LPARAM lParam)

{ static HWND hCtrlBlock ;

static int iColor, iFigure,iBrush;

switch (message)

{

case WM_INITDIALOG:

iColor = iCurrentColor ;

iFigure = iCurrentFigure ;

iBrush = iCurrenBrush;

CheckRadioButton(hDlg,IDC_BLACK,IDC_WHITE,

iColor);




52/69


CheckRadioButton(hDlg,IDC_RECT,IDC_ELLIPSE,iFig

ure);CheckRadioButton (hDlg, IDC_HS_BDIAGONAL,

IDC_HS_VERTICAL, iBrush);

9293949596979899

100101102103104105106107108109110111112113114115116117118119120121122123124125

126127128129130131132133134135

136137

hCtrlBlock = GetDlgItem (hDlg, IDC_PAINT) ;

SetFocus (GetDlgItem (hDlg, iColor)) ;

return FALSE ;

case WM_COMMAND:


{

case IDOK:

iCurrentColor = iColor ;

iCurrentFigure = iFigure ;

iCurrenBrush = iBrush;

EndDialog (hDlg, TRUE) ;

return TRUE ;

case IDCANCEL:

EndDialog (hDlg, FALSE) ;

return TRUE ;

case IDC_BLACK:

case IDC_RED:

case IDC_GREEN:

case IDC_YELLOW:

case IDC_BLUE:

case IDC_MAGENTA:

case IDC_CYAN:

case IDC_WHITE:

iColor = LOWORD (wParam) ;

CheckRadioButton (hDlg, IDC_BLACK,

IDC_WHITE, LOWORD (wParam)) ;

PaintTheBlock (hCtrlBlock, iColor,

iFigure,iBrush);

return TRUE ;

case IDC_RECT:

case IDC_ELLIPSE:

iFigure = LOWORD (wParam) ;CheckRadioButton (hDlg, IDC_RECT,

IDC_ELLIPSE, LOWORD (wParam)) ;


iFigure,iBrush);

return TRUE ;

case IDC_HS_BDIAGONAL:

case IDC_HS_CROSS:

case IDC_HS_DIAGCROSS:

case IDC_HS_FDIAGONAL:

case IDC_HS_HORIZONTAL:case IDC_HS_VERTICAL:




53/69


iBrush = LOWORD (wParam)138139140141142143144145146147148149150151

CheckRadioButton(hDlg,IDC_HS_BDIAGONAL,

IDC_HS_VERTICAL, LOWORD (wParam)) ;


iFigure,iBrush);

return TRUE ;

}

break;

case WM_PAINT:

PaintTheBlock (hCtrlBlock, iColor, iFigure,iBrush) ;

break ;

}

return FALSE ;

}

d) Hp thoi khng trng thi

Hin th hp thoi

HWND hDlgModeless=CreateDialog(hInstance, szTemplate,hwndParent, DialogProc);

ShowWindow(hDlgModeless,SW_SHOW);

while(GetMessage(&msg, NULL, 0, 0)){

if(hDlgModeless==0 || !IsDialogMessage

(hDlgModeless, &msg);{TranslateMessage(&msg);DispatchMessage(&msg);

}}

while(GetMessage(&msg, NULL, 0, 0)){

if(hDlgModeless==0 || !IsDialogMessage(hDlgModeless,

&msg);{

if(TranslateAccelerator (hwnd, hAccel, &msg){

TranslateMessage(&msg);DispatchMessage(&msg);

}}

} ng hp thoi

t hDlgModeless v gi tr 0.




54/69


BOOL DestroyWindow(

HWNDhWnd // handle to window to destroy

);

V d

void PaintWindow (HWND hwnd, int iColor[], int iFigure)123456789

10111213141516171819202122232425262728

{

HBRUSH hBrush ;

HDC hdc ;

RECT rect ;

hdc = GetDC(hwnd) ;

GetClientRect (hwnd, &rect) ;

hBrush = CreateSolidBrush(RGB(iColor[0], iColor[1],

iColor[2]));

hBrush = (HBRUSH) SelectObject (hdc, hBrush) ;

if (iFigure == IDC_RECT)

Rectangle (hdc, rect.left, rect.top, rect.right,

rect.bottom) ;

else

Ellipse(hdc, rect.left, rect.top, rect.right,

rect.bottom) ;

DeleteObject (SelectObject (hdc, hBrush)) ;

ReleaseDC (hwnd, hdc) ;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT

message, WPARAM wParam, LPARAM lParam)

{

switch (message)

{

case WM_PAINT:

PaintTheBlock(hwnd, iColor, iFigure) ;

return 0 ;

case WM_DESTROY :




55/69


DeleteObject((HGDIOBJ)SetClassLong(hw

nd, GCL_HBRBACKGROUND,(LONG)

GetStockObject (WHITE_BRUSH))) ;

29303132333435363738394041424344454647484950515253545556575859606162

63646566676869707172

7374


return 0 ;

}

return DefWindowProc (hwnd, message, wParam,

lParam);

}

void PaintTheBlock (HWND hCtrl, int iColor[], int iFigure)

{

InvalidateRect (hCtrl, NULL, TRUE);

UpdateWindow (hCtrl) ;

PaintWindow (hCtrl, iColor, iFigure) ;

}

BOOL CALLBACK ColorScrDlg (HWND hDlg, UINT

message, WPARAM wParam, LPARAM lParam)

{

HWND hwndParent, hCtrl ;

static HWND hCtrlBlock ;

int iCtrlID, iIndex ;

switch (message)

{

case WM_INITDIALOG :

hCtrlBlock = GetDlgItem (hDlg,

IDC_PAINT) ;

for (iCtrlID = 10 ; iCtrlID < 13 ; iCtrlID++)

{

hCtrl = GetDlgItem (hDlg, iCtrlID) ;


iFigure) ;

PaintTheBlock (hwndParent, iColor,

iFigure) ;

SetScrollRange (hCtrl, SB_CTL, 0,

255, FALSE) ;SetScrollPos(hCtrl, SB_CTL, 0,

FALSE) ;

}

return TRUE ;

case WM_COMMAND:

{

switch( LOWORD(wParam))

{

case IDC_RECT:

case IDC_ELLIPSE:iFigure = LOWORD(wParam);




56/69


hwndParent =

GetParent(hDlg);

75767778798081828384858687888990919293949596979899

100101102103104105106107108

109110111112113114115116117118

119120

CheckRadioButton(hDlg,

IDC_RECT, IDC_ELLIPSE,

LOWORD (wParam)) ;

PaintTheBlock(hCtrlBlock,

iColor, iFigure) ;

PaintTheBlock (hwndParent,

iColor, iFigure) ;

return TRUE ;

}

break;

}

case WM_VSCROLL :

hCtrl = (HWND) lParam ;

iCtrlID = GetWindowLong (hCtrl,

GWL_ID) ;

iIndex = iCtrlID - 10 ;

hwndParent = GetParent (hDlg) ;

PaintTheBlock (hCtrlBlock, iColor, iFigure);

PaintTheBlock (hwndParent, iColor,

iFigure) ;


{

case SB_PAGEDOWN :

iColor[iIndex] += 15 ;

case SB_LINEDOWN :

iColor[iIndex] = min (255,

iColor[iIndex] + 1) ;

break;

case SB_PAGEUP :

iColor[iIndex] -= 15 ;

case SB_LINEUP :

iColor[iIndex] = max (0,

iColor[iIndex] - 1);break;

case SB_TOP :

iColor[iIndex] = 0 ;

break;

case SB_BOTTOM :

iColor[iIndex] = 255 ;

break;

case SB_THUMBPOSITION :

case SB_THUMBTRACK :

iColor[iIndex] = HIWORD(wParam) ;




57/69


break;121122123124125126127128129130131132133134135136137138139

default :

return FALSE ;

}

SetScrollPos(hCtrl, SB_CTL, iColor[iIndex],

TRUE) ;

SetDlgItemInt (hDlg, iCtrlID + 3, iColor[iIndex],

FALSE) ;

InvalidateRect(hwndParent,NULL,TRUE);

DeleteObject ( (HGDIOBJ)SetClassLong(

hwndParent, GCL_HBRBACKGROUND, (LONG)

CreateSolidBrush( RGB(iColor[0], iColor[1],

iColor[2]) ) ) ) ;

return TRUE ;

case WM_PAINT:

PaintTheBlock(hCtrlBlock, iColor, iFigure) ;

break;

}

return FALSE ;

2. Menu

a) To Menu

MENUDEMO MENU DISCARDABLE

BEGINPOPUP "&File"

BEGIN

MENUITEM "&New", IDM_FILE_NEW

MENUITEM "&Open", IDM_FILE_OPEN

MENUITEM "&Save", IDM_FILE_SAVE

MENUITEM "Save &As...", IDM_FILE_SAVE_AS

MENUITEM SEPARATOR

MENUITEM "E&xit", IDM_APP_EXIT

END

POPUP "&Edit"BEGIN

MENUITEM "&Undo", IDM_EDIT_UNDO

MENUITEM SEPARATOR

MENUITEM "C&ut", IDM_EDIT_CUT

MENUITEM "&Copy", IDM_EDIT_COPY

MENUITEM "&Paste", IDM_EDIT_PASTE

MENUITEM "De&lete", IDM_EDIT_CLEAR

END

POPUP "&Background"

BEGIN




58/69


MENUITEM "&White", IDM_BKGND_WHITE,

CHECKED

MENUITEM "&Light Gray", IDM_BKGND_LTGRAY

MENUITEM "&Gray", IDM_BKGND_GRAY

MENUITEM "&Dark Gray", IDM_BKGND_DKGRAY

MENUITEM "&Black", IDM_BKGND_BLACK

END

POPUP "&Help"

BEGIN

MENUITEM "&Help...", IDM_APP_HELP

MENUITEM "&About ...", IDM_APP_ABOUT

ENDEND

b) Thit lp Menu

wndclass.lpszMenuName = "MENU1";

hoc:

hMenu = LoadMenu ( hInstance, TEXT("MENU1") );

hwnd = CreateWindow ( TEXT("MyClass"), TEXT("Window

Caption"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,

NULL, hMenu, hInstance, NULL );

SetMenu(hWnd, hMenu);

LOWORD(WPARAM) cha ID cc iu khin.

c) V d

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM,

LPARAM);

1234

56789

1011121314

1516

/* Khai bo tn dng chung cho ccti nguyn trong chng trnh.*/TCHAR szAppName[] = TEXT ("MenuDemo") ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCEhPrevInstance, PSTR szCmdLine, int iCmdShow)

{

HWND hwnd;

MSG msg;

WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;

wndclass.lpfnWndProc = WndProc ;

wndclass.cbClsExtra = 0 ;

wndclass.cbWndExtra = 0 ;

wndclass.hInstance = hInstance ;wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);




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wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);17181920212223242526272829303132333435363738394041424344454647484950

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wndclass.hbrBackground =

(HBRUSH)GetStockObject(WHITE_BRUSH) ;

wndclass.lpszMenuName = szAppName ;

wndclass.lpszClassName = szAppName ;

if (!RegisterClass (&wndclass))

{

MessageBox(NULL, TEXT("This program requires

Windows "), szAppName, MB_ICONERROR) ;

return 0 ;

}

hwnd = CreateWindow (szAppName, TEXT("Menu

Demonstration"), WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT, CW_USEDEFAULT,

CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL,

hInstance, NULL) ;

ShowWindow (hwnd, iCmdShow) ;

UpdateWindow (hwnd) ;

while (GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage (&msg) ;

DispatchMessage (&msg) ;

}

return msg.wParam ;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message,


{

/* Khao bo danh sch cc mu chi t, cc hng ny c nhngha trong file WINGDI.H */static int idColor[5] = { WHITE_BRUSH, LTGRAY_BRUSH,

GRAY_BRUSH, DKGRAY_BRUSH, BLACK_BRUSH } ;

static int iSelection = IDM_BKGND_WHITE ;

HMENU hMenu ;

switch (message){

case WM_COMMAND:

hMenu = GetMenu (hwnd) ;// Ly nh danh ca menuswitch (LOWORD (wParam))//Kim tra nh danh mc chn{

case IDM_FILE_NEW:

case IDM_FILE_OPEN:

case IDM_FILE_SAVE:

case IDM_FILE_SAVE_AS:

MessageBeep(0) ;//Pht ra ting ku bpreturn 0 ;




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case IDM_APP_EXIT:63646566676869707172737475767778798081828384858687888990919293949596

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/*Gi thngip ngng dng li*/SendMessage (hwnd, WM_CLOSE, 0, 0) ;

return 0 ;

case IDM_EDIT_UNDO:

case IDM_EDIT_CUT:

case IDM_EDIT_COPY:

case IDM_EDIT_PASTE:

case IDM_EDIT_CLEAR:

MessageBeep (0) ;

return 0 ;

case IDM_BKGND_WHITE:

case IDM_BKGND_LTGRAY:

case IDM_BKGND_GRAY:

case IDM_BKGND_DKGRAY:

case IDM_BKGND_BLACK:

/* B check ca mc chn trc */CheckMenuItem(hMenu,iSelection,

MF_UNCHECKED);

iSelection = LOWORD (wParam) ;/*Ly IDmc mi*/

/* Check mc chn mi*/CheckMenuItem (hMenu, iSelection,

MF_CHECKED) ;

/* Thit lp mu tngng vi mc chnmi*/SetClassLong(hwnd,GCL_HBRBACKGRO

UND, (LONG)

Ge

giao trinh lap trinh c for winform - smith.n studio

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