Last updated: 18. 1.1998, 10:17
<* +M2EXTENSIONS *> (*---------------------------------------------- METAFILE.C --- Metafile Demonstration Program (c) Charles Petzold, 1996 MetaFile.mod --- Translation to XDS Modula-2 (c) Peter Stadler, 1997 ----------------------------------------------*) MODULE MetaFile; IMPORT Windows; IMPORT SYSTEM; CONST AppName = "MetaFile"; VAR hwnd : Windows.HWND; msg : Windows.MSG; wc : Windows.WNDCLASSEX; VAR (* static in WndProc *) hmf : Windows.HMETAFILE; cxClient : INTEGER; cyClient : INTEGER; (*++++**********************************************************************) PROCEDURE [Windows.CALLBACK] WndProc (hwnd : Windows.HWND; iMsg : Windows.UINT; wParam : Windows.WPARAM; lParam : Windows.LPARAM) : Windows.LRESULT; (***************************************************************************) VAR hBrush : Windows.HBRUSH; hdc : Windows.HDC; hdcMeta : Windows.HDC; x : INTEGER; y : INTEGER; ps : Windows.PAINTSTRUCT; BEGIN CASE (iMsg) OF | Windows.WM_CREATE: hdcMeta := Windows.CreateMetaFile (NIL); hBrush := Windows.CreateSolidBrush (Windows.RGB (0, 0, 255)); Windows.Rectangle (hdcMeta, 0, 0, 100, 100); Windows.MoveToEx (hdcMeta, 0, 0, NIL); Windows.LineTo (hdcMeta, 100, 100); Windows.MoveToEx (hdcMeta, 0, 100, NIL); Windows.LineTo (hdcMeta, 100, 0); Windows.SelectObject (hdcMeta, SYSTEM.CAST(Windows.HGDIOBJ,hBrush)); Windows.Ellipse (hdcMeta, 20, 20, 80, 80); hmf := Windows.CloseMetaFile (hdcMeta); Windows.DeleteObject (SYSTEM.CAST(Windows.HGDIOBJ,hBrush)); RETURN 0; | Windows.WM_SIZE: cxClient := Windows.LOWORD (lParam); cyClient := Windows.HIWORD (lParam); RETURN 0; | Windows.WM_PAINT: hdc := Windows.BeginPaint (hwnd, ps); Windows.SetMapMode (hdc,Windows.MM_ANISOTROPIC); Windows.SetWindowExtEx (hdc, 1000, 1000, NIL); Windows.SetViewportExtEx (hdc, cxClient, cyClient, NIL); FOR x := 0 TO 10-1 DO FOR y := 0 TO 10-1 DO Windows.SetWindowOrgEx (hdc, -100 * x, -100 * y,NIL); Windows.PlayMetaFile (hdc, hmf); END; END; Windows.EndPaint (hwnd, ps); RETURN 0; | Windows.WM_DESTROY: Windows.DeleteMetaFile (hmf); Windows.PostQuitMessage (0); RETURN 0; ELSE RETURN Windows.DefWindowProc (hwnd, iMsg, wParam, lParam); END; END WndProc; (*+++******************************************************************) PROCEDURE InitApplication () : BOOLEAN; (**********************************************************************) VAR rc : CARDINAL; BEGIN wc.cbSize := SIZE(Windows.WNDCLASSEX); wc.style := Windows.CS_HREDRAW + Windows.CS_VREDRAW; wc.lpfnWndProc := WndProc; wc.cbClsExtra := 0; wc.cbWndExtra := 0; wc.hInstance := Windows.MyInstance(); wc.hIcon := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION); wc.hCursor := Windows.LoadCursor (NIL, Windows.IDC_ARROW); wc.hbrBackground := SYSTEM.CAST(Windows.HBRUSH, Windows.GetStockObject (Windows.WHITE_BRUSH)); wc.lpszMenuName := NIL; wc.lpszClassName := SYSTEM.ADR(AppName); wc.hIconSm := Windows.LoadIcon (NIL, Windows.IDI_APPLICATION); rc := Windows.RegisterClassEx (wc); RETURN rc #0; END InitApplication; (*+++******************************************************************) PROCEDURE InitMainWindow() : BOOLEAN; (**********************************************************************) BEGIN hwnd := Windows.CreateWindow (AppName, "MetaFile Demonstration: Translation to XDS Modula-2", Windows.WS_OVERLAPPEDWINDOW, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, Windows.CW_USEDEFAULT, NIL, NIL, Windows.MyInstance(), NIL); IF hwnd = NIL THEN RETURN FALSE; END; Windows.ShowWindow (hwnd, Windows.SW_SHOWDEFAULT); Windows.UpdateWindow (hwnd); RETURN TRUE; END InitMainWindow; BEGIN IF InitApplication() AND InitMainWindow() THEN WHILE (Windows.GetMessage (msg, NIL, 0, 0)) DO Windows.TranslateMessage (msg); Windows.DispatchMessage (msg); END; END; END MetaFile.