Logo Search packages:      
Sourcecode: tcc version File versions  Download package

hello_win.c

//+---------------------------------------------------------------------------
//
//  HELLO_WIN.C - Windows GUI 'Hello World!' Example
//
//+---------------------------------------------------------------------------

#include <windows.h>

#define APPNAME "HELLO_WIN"

char szAppName[] = APPNAME; // The name of this application
char szTitle[]   = APPNAME; // The title bar text
char *pWindowText;

HINSTANCE g_hInst;          // current instance

void CenterWindow(HWND hWnd);

//+---------------------------------------------------------------------------
//
//  Function:   WndProc
//
//  Synopsis:   very unusual type of function - gets called by system to
//              process windows messages.
//
//  Arguments:  same as always.
//----------------------------------------------------------------------------

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
      switch (message)
      {
            // ----------------------- first and last
            case WM_CREATE:
                  CenterWindow(hwnd);
                  break;

            case WM_DESTROY:
                  PostQuitMessage(0);
                  break;


            // ----------------------- get out of it...
            case WM_RBUTTONUP:
                  DestroyWindow(hwnd);
                  break;

            case WM_KEYDOWN:
                  if (VK_ESCAPE == wParam)
                        DestroyWindow(hwnd);
                  break;


            // ----------------------- display our minimal info
            case WM_PAINT:
            {
                  PAINTSTRUCT ps;
                  HDC         hdc;
                  RECT        rc;
                  hdc = BeginPaint(hwnd, &ps);

                  GetClientRect(hwnd, &rc);
                  SetTextColor(hdc, RGB(240,240,96));
                  SetBkMode(hdc, TRANSPARENT);
                  DrawText(hdc, pWindowText, -1, &rc, DT_CENTER|DT_SINGLELINE|DT_VCENTER);

                  EndPaint(hwnd, &ps);
                  break;
            }

            // ----------------------- let windows do all other stuff
            default:
                  return DefWindowProc(hwnd, message, wParam, lParam);
      }
      return 0;
}

//+---------------------------------------------------------------------------
//
//  Function:   WinMain
//
//  Synopsis:   standard entrypoint for GUI Win32 apps
//
//----------------------------------------------------------------------------
int APIENTRY WinMain(
                        HINSTANCE hInstance,
                        HINSTANCE hPrevInstance,
                        LPSTR     lpCmdLine,
                        int       nCmdShow)
{
      MSG msg;

      WNDCLASS wc;

      HWND hwnd;

      // Fill in window class structure with parameters that describe
      // the main window.

      ZeroMemory(&wc, sizeof wc);
      wc.hInstance     = hInstance;
      wc.lpszClassName = szAppName;
      wc.lpfnWndProc   = (WNDPROC)WndProc;
      wc.style         = CS_DBLCLKS|CS_VREDRAW|CS_HREDRAW;
      wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
      wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
      wc.hCursor       = LoadCursor(NULL, IDC_ARROW);

      if (FALSE == RegisterClass(&wc)) return 0;

      // create the browser
      hwnd = CreateWindow(
            szAppName,
            szTitle,
            WS_OVERLAPPEDWINDOW|WS_VISIBLE,
            CW_USEDEFAULT,
            CW_USEDEFAULT,
            360,//CW_USEDEFAULT,
            240,//CW_USEDEFAULT,
            0,
            0,
            g_hInst,
            0);

      if (NULL == hwnd) return 0;

      pWindowText = lpCmdLine[0] ? lpCmdLine : "Hello Windows!";

      // Main message loop:
      while (GetMessage(&msg, NULL, 0, 0) > 0)
      {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
      }

      return msg.wParam;
}

//+---------------------------------------------------------------------------

//+---------------------------------------------------------------------------

void CenterWindow(HWND hwnd_self)
{
      RECT rw_self, rc_parent, rw_parent; HWND hwnd_parent;
      hwnd_parent = GetParent(hwnd_self);
      if (NULL==hwnd_parent) hwnd_parent = GetDesktopWindow();
      GetWindowRect(hwnd_parent, &rw_parent);
      GetClientRect(hwnd_parent, &rc_parent);
      GetWindowRect(hwnd_self, &rw_self);
      SetWindowPos(hwnd_self, NULL,
            rw_parent.left + (rc_parent.right + rw_self.left - rw_self.right) / 2,
            rw_parent.top  + (rc_parent.bottom + rw_self.top - rw_self.bottom) / 2,
            0, 0,
            SWP_NOSIZE|SWP_NOZORDER|SWP_NOACTIVATE
            );
}

//+---------------------------------------------------------------------------

Generated by  Doxygen 1.6.0   Back to index