Win32程式設計---實現點,線,面的繪製
阿新 • • 發佈：2019-02-03
#include <windows.h> #include <string> using namespace std; //----------函式宣告--------------- void init(HWND hWnd,HINSTANCE hInstance); void pix(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,PAINTSTRUCT &Ps);//畫點,也就是畫素輸出 void rect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,PAINTSTRUCT &Ps);//----畫矩形---- void fillrect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps);//填充矩形 void linerect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps);//線框矩形 void triangle(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,POINT Pt[3],PAINTSTRUCT &Ps);//三角形 void ellipse(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps);//橢圓 void DrawContent(HWND hWnd); //-----回撥函式----------------- LRESULT CALLBACK WindProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam); INT WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { WNDCLASSEX WndCls; MSG Msg; WndCls.cbSize = sizeof(WndCls); WndCls.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW; WndCls.lpfnWndProc = WindProcedure; WndCls.cbClsExtra = 0; WndCls.cbWndExtra = 0; WndCls.hInstance = hInstance; WndCls.hIcon = LoadIcon(NULL, IDI_APPLICATION); WndCls.hCursor = LoadCursor(NULL, IDC_ARROW); WndCls.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); WndCls.lpszMenuName = NULL; WndCls.lpszClassName = TEXT("MAIN"); WndCls.hIconSm = LoadIcon(hInstance, IDI_APPLICATION); RegisterClassEx(&WndCls); HWND hWnd=CreateWindowEx(WS_EX_OVERLAPPEDWINDOW, TEXT("MAIN"),TEXT( "陳琦"), WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, 820, 820, NULL, NULL, hInstance, NULL); init(hWnd,hInstance); UpdateWindow(hWnd); while( GetMessage(&Msg, NULL, 0, 0) ) { TranslateMessage(&Msg); DispatchMessage( &Msg); } return static_cast<int>(Msg.wParam); } void init(HWND hWnd,HINSTANCE hInstance) { CreateWindow( TEXT("BUTTON"), TEXT("畫點"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 0, 150,80, hWnd,NULL, hInstance, NULL); CreateWindow( TEXT("BUTTON"), TEXT("矩形"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 90, 150,80, hWnd,NULL, hInstance, NULL); CreateWindow( TEXT("BUTTON"), TEXT("填充矩形"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 180, 150,80, hWnd,NULL, hInstance, NULL); CreateWindow( TEXT("BUTTON"), TEXT("線框矩形"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 270, 150,80, hWnd,NULL, hInstance, NULL); CreateWindow( TEXT("BUTTON"), TEXT("三角形"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 360, 150,80, hWnd,NULL, hInstance, NULL); CreateWindow( TEXT("BUTTON"), TEXT("橢圓"), WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON, 0, 450, 150,80, hWnd,NULL, hInstance, NULL); } LRESULT CALLBACK WindProcedure(HWND hWnd, UINT Msg,WPARAM wParam, LPARAM lParam) { HDC hDC; PAINTSTRUCT Ps; HBRUSH NewBrush; RECT r; POINT Pt[3]; switch(Msg) { case WM_COMMAND: HWND h; h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("畫點")); if(DWORD(lParam)==int(h)) { pix(hWnd,hDC,NewBrush,Ps); break; } h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("矩形")); if(DWORD(lParam)==int(h)) { rect(hWnd,hDC,NewBrush,Ps); break; } h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("填充矩形")); if(DWORD(lParam)==int(h)) { fillrect(hWnd,hDC,NewBrush,r,Ps); break; } h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("線框矩形")); if(DWORD(lParam)==int(h)) { linerect(hWnd,hDC,NewBrush,r,Ps); break; } h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("三角形")); if(DWORD(lParam)==int(h)) { triangle(hWnd,hDC,NewBrush,Pt,Ps); break; } h=FindWindowEx(hWnd ,NULL,TEXT("BUTTON"),TEXT("橢圓")); if(DWORD(lParam)==int(h)) { ellipse(hWnd,hDC,NewBrush,r,Ps); break; } case WM_PAINT: DrawContent(hWnd);//為什麼加了這一句後開始按鈕就會顯示，而不加的話按鈕需要重繪以後顯示 break; case WM_DESTROY: PostQuitMessage(WM_QUIT); break; default: return DefWindowProc(hWnd, Msg, wParam, lParam); } return 0; } //畫點 void pix(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,PAINTSTRUCT &Ps) { //hDC = BeginPaint(hWnd, &Ps);//用BeginPaint的話訊息一定要WM_PAINT響應，但是WM_PAINT裡面只有DrawContent(hWnd); //所以用getDC hDC=GetDC(hWnd); NewBrush=CreateSolidBrush(RGB(255,0,0)); //SelectObject(hDC, NewBrush); for(int x=500;x<600;x++)//由於一個點太小了，所以這裡花了100個點構成線段 SetPixel(hDC,x,50,RGB(255,0,0)); //DeleteObject(NewBrush); //EndPaint(hWnd, &Ps); ReleaseDC(hWnd,hDC); } //矩形 void rect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,PAINTSTRUCT &Ps) { //hDC = BeginPaint(hWnd, &Ps); hDC=GetDC(hWnd); NewBrush=CreateSolidBrush(RGB(255,0,0)); SelectObject(hDC, NewBrush); Rectangle(hDC,400,400,500,500); DeleteObject(NewBrush); ReleaseDC(hWnd,hDC); //EndPaint(hWnd, &Ps); } //填充矩形 void fillrect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps) { //hDC = BeginPaint(hWnd, &Ps); hDC=GetDC(hWnd); NewBrush = CreateSolidBrush(RGB(25, 25, 5)); SelectObject(hDC, NewBrush); SetRect (&r, 200, 200,250, 250); FillRect(hDC, &r, NewBrush); DeleteObject(NewBrush); //EndPaint(hWnd, &Ps); ReleaseDC(hWnd,hDC); } //線框矩形 void linerect(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps) { //hDC = BeginPaint(hWnd, &Ps); hDC=GetDC(hWnd); NewBrush = CreateSolidBrush(RGB(25, 25, 5)); SelectObject(hDC, NewBrush); SetRect (&r, 250, 250,400, 400); FrameRect(hDC, &r, NewBrush); DeleteObject(NewBrush); DeleteObject(NewBrush); //EndPaint(hWnd, &Ps); ReleaseDC(hWnd,hDC); } //三角形 void triangle(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,POINT Pt[3],PAINTSTRUCT &Ps) { //hDC = BeginPaint(hWnd, &Ps); hDC=GetDC(hWnd); NewBrush = CreateSolidBrush(RGB(50, 50, 50)); SelectObject(hDC, NewBrush); Pt[0].x = 425; Pt[0].y = 40; Pt[1].x = 395; Pt[1].y = 70; Pt[2].x = 455; Pt[2].y = 70; Polygon(hDC, Pt, 3); DeleteObject(NewBrush); NewBrush = CreateSolidBrush(RGB(0, 255, 0)); SelectObject(hDC, NewBrush); Pt[0].x = 365; Pt[0].y = 110; Pt[1].x = 395; Pt[1].y = 80; Pt[2].x = 395; Pt[2].y = 140; Polygon(hDC, Pt, 3); DeleteObject(NewBrush); NewBrush = CreateSolidBrush(RGB(255, 0, 0)); SelectObject(hDC, NewBrush); Pt[0].x = 485; Pt[0].y = 110; Pt[1].x = 455; Pt[1].y = 80; Pt[2].x = 455; Pt[2].y = 140; Polygon(hDC, Pt, 3); DeleteObject(NewBrush); NewBrush = CreateSolidBrush(RGB(0, 0, 255)); SelectObject(hDC, NewBrush); Pt[0].x = 425; Pt[0].y = 180; Pt[1].x = 455; Pt[1].y = 150; Pt[2].x = 395; Pt[2].y = 150; Polygon(hDC, Pt, 3); DeleteObject(NewBrush); //EndPaint(hWnd, &Ps); ReleaseDC(hWnd,hDC); } //橢圓 void ellipse(HWND &hWnd,HDC &hDC,HBRUSH &NewBrush,RECT &r,PAINTSTRUCT &Ps)//橢圓 { //hDC = BeginPaint(hWnd, &Ps); hDC=GetDC(hWnd); NewBrush = CreateSolidBrush(RGB(255, 0, 0)); SelectObject(hDC, NewBrush); Ellipse(hDC,500,500,600,600); DeleteObject(NewBrush); //EndPaint(hWnd, &Ps); ReleaseDC(hWnd,hDC); } void DrawContent(HWND hWnd) { HDC hDC; PAINTSTRUCT Ps; hDC = BeginPaint(hWnd, &Ps);//用BeginPaint的話訊息一定要WM_Paint響應 EndPaint(hWnd, &Ps); }