Ministerul Educației, Culturii și Cercetării al Republicii Moldova
Universitatea Tehnică a Moldovei
Facultatea Calculatoare, Informatică și Microelectronică
Raport la
Lucrarea de laborator Nr. 2
Disciplina: Programarea pilotată de evenimente
Tema: ” Interfaţa GDI”
Au efectuat:
A verificat:
Chișinău – 2021
Sarcina: Scrieţi un program care afişează în zona client un desen animat,
utilizând toate primitivele GDI.
// laboratorul 2.cpp : Defines the entry point for the application.
//
#include "framework.h"
#include "laboratorul 2.h"
#define MAX_LOADSTRING 100
// Global Variables:
HINSTANCE hInst; // current instance
WCHAR szTitle[MAX_LOADSTRING]; // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
RECT rcCurrent = { 0,0,20,20 };
POINT aptStar[6] = { 10,1, 1,19, 19,6, 1,6, 19,19, 10,1 };
int X = 2, Y = -1, idTimer = -1;
BOOL fVisible = FALSE;
HDC hdc;
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: Place code here.
// Initialize global strings
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_LABORATORUL2, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_LABORATORUL2));
MSG msg;
// Main message loop:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_LABORATORUL2));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_LABORATORUL2);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
//
// FUNCTION: InitInstance(HINSTANCE, 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)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 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
//
//
LRESULT APIENTRY WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
RECT rc;
RECT rc2;
HBRUSH hBrush1 = CreateSolidBrush(RGB(235, 200, 21, 0));
HBRUSH hBrush2 = CreateSolidBrush(RGB(255, 255, 255, 255));
switch (message)
{
case WM_CREATE:
// Calculate the starting point.
GetClientRect(hwnd, &rc);
OffsetRect(&rcCurrent, rc.right / 2, rc.bottom / 2);
// Initialize the private DC.
hdc = GetDC(hwnd);
SetViewportOrgEx(hdc, rcCurrent.left,
rcCurrent.top, NULL);
SetROP2(hdc, R2_NOT);
// Start the timer.
SetTimer(hwnd, idTimer = 1, 10, NULL);
return 0L;
case WM_DESTROY:
KillTimer(hwnd, 1);
PostQuitMessage(0);
return 0L;
case WM_SIZE:
switch (wParam)
{
case SIZE_MINIMIZED:
// Stop the timer if the window is minimized.
KillTimer(hwnd, 1);
idTimer = -1;
break;
case SIZE_RESTORED:
// Move the star back into the client area
// if necessary.
if (rcCurrent.right > (int) LOWORD(lParam))
{
rcCurrent.left =
(rcCurrent.right =
(int) LOWORD(lParam)) - 20;
}
if (rcCurrent.bottom > (int) HIWORD(lParam))
{
rcCurrent.top =
(rcCurrent.bottom =
(int) HIWORD(lParam)) - 20;
}
// Fall through to the next case.
case SIZE_MAXIMIZED:
// Start the timer if it had been stopped.
if (idTimer == -1)
SetTimer(hwnd, idTimer = 1, 10, NULL);
break;
}
return 0L;
case WM_TIMER:
if (fVisible)
Ellipse(hdc, 0, 20, 40, 60);
// elipsa ricoseaza cand atinge marginea.
GetClientRect(hwnd, &rc);
if (rcCurrent.left + X < rc.left ||
rcCurrent.right + X > rc.right)
X = -X;
if (rcCurrent.top + Y < rc.top ||
rcCurrent.bottom + Y > rc.bottom)
Y = -Y;
//arata elipsa in noua sa pozitie
OffsetRect(&rcCurrent, X, Y);
SetViewportOrgEx(hdc, rcCurrent.left,
rcCurrent.top, NULL);
fVisible = Ellipse(hdc, 0, 20, 40, 60);
return 0L;
case WM_ERASEBKGND:
// Erase the star.
fVisible = FALSE;
return DefWindowProc(hwnd, message, wParam, lParam);
case WM_PAINT:
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
if (!fVisible) {
SelectObject(hdc, hBrush2);
SetPolyFillMode(hdc, WINDING);
fVisible = Polyline(hdc, aptStar, 6);
SelectObject(hdc, hBrush1);
Ellipse(hdc, 0, 50, 100, 150);
RoundRect(hdc, 100, 150, 200, 250, 20, 20);
Rectangle(hdc, 200, 250, 300, 350);
Pie(hdc,300, 350, 400, 450, 300, 350, 450, 500);
}
EndPaint(hwnd, &ps);
return 0L;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
Concluzie : În această lucrare de laborator am studiat primitivele de interfață GDI,
am apelat funcțiile GDI pentru a desena figuri și pentru a anima elipsa să se miște.
Am elaborat un program simplu, aplicând în practică cunoștințele teoretice.
