Last updated: 18. 1.1998, 16:18
<* +M2EXTENSIONS *> MODULE About2; (*-------------------------------------------- ABOUT2.C --- About Box Demo Program No. 2 (c) Charles Petzold, 1996 About2.MOD --- Translation to XDS Modula-2 (c) Peter Stadler, 1997 ------------------------------------------*) IMPORT h2d_about2; IMPORT Windows; IMPORT SYSTEM; CONST szAppName = "About2"; VAR iCurrentColor : INTEGER; iCurrentFigure : INTEGER; TYPE COLORREFARRAY = ARRAY[0..7] OF Windows.COLORREF; VAR msg : Windows.MSG; hwnd : Windows.HWND; wc : Windows.WNDCLASSEX; crColor : COLORREFARRAY; hInstance : Windows.HINSTANCE; hCtrlBlock : Windows.HWND; iColor : INTEGER; iFigure : INTEGER; (*++++*****************************************************************) PROCEDURE PaintWindow ( hwnd : Windows.HWND; iColor : INTEGER; iFigure : INTEGER); (**********************************************************************) VAR hBrush : Windows.HBRUSH; hdc : Windows.HDC; rect : Windows.RECT; BEGIN hdc := Windows.GetDC (hwnd); Windows.GetClientRect (hwnd, rect); hBrush := Windows.CreateSolidBrush (crColor[iColor - h2d_about2.IDD_BLACK]); hBrush := SYSTEM.CAST(Windows.HBRUSH, Windows.SelectObject (hdc, SYSTEM.CAST(Windows.HGDIOBJ,hBrush))); IF (iFigure = h2d_about2.IDD_RECT) THEN Windows.Rectangle (hdc, rect.left, rect.top, rect.right, rect.bottom); ELSE Windows.Ellipse (hdc, rect.left, rect.top, rect.right, rect.bottom); END; Windows.DeleteObject (Windows.SelectObject (hdc, SYSTEM.CAST(Windows.HGDIOBJ,hBrush))); Windows.ReleaseDC (hwnd, hdc); END PaintWindow; (*++++*****************************************************************) PROCEDURE PaintTheBlock ( hCtrl : Windows.HWND; iColor : INTEGER; iFigure: INTEGER); (**********************************************************************) BEGIN Windows.InvalidateRect (hCtrl, NIL, TRUE); Windows.UpdateWindow (hCtrl); PaintWindow (hCtrl, iColor, iFigure); END PaintTheBlock; (*++++*****************************************************************) PROCEDURE [Windows.CALLBACK] AboutDlgProc (hDlg : Windows.HWND; (**********************************************************************) iMsg : Windows.UINT; wParam : Windows.WPARAM; lParam : Windows.LPARAM) : Windows.BOOL; BEGIN CASE (iMsg) OF | Windows.WM_INITDIALOG : iColor := iCurrentColor; iFigure := iCurrentFigure; Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, iColor); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_RECT, h2d_about2.IDD_ELL, iFigure); hCtrlBlock := Windows.GetDlgItem (hDlg, h2d_about2.IDD_PAINT); Windows.SetFocus (Windows.GetDlgItem (hDlg, iColor)); RETURN FALSE; | Windows.WM_COMMAND : CASE (Windows.LOWORD (wParam)) OF | Windows.IDOK : iCurrentColor := iColor; iCurrentFigure := iFigure; Windows.EndDialog (hDlg, 1); RETURN TRUE; | Windows.IDCANCEL : Windows.EndDialog (hDlg, 0); RETURN TRUE; | h2d_about2.IDD_BLACK : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_RED : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_GREEN : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_YELLOW : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_BLUE : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_MAGENTA : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_CYAN : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_WHITE : iColor := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_BLACK, h2d_about2.IDD_WHITE, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_RECT : iFigure := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_RECT, h2d_about2.IDD_ELL, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; | h2d_about2.IDD_ELL : iFigure := Windows.LOWORD (wParam); Windows.CheckRadioButton (hDlg, h2d_about2.IDD_RECT, h2d_about2.IDD_ELL, Windows.LOWORD (wParam)); PaintTheBlock (hCtrlBlock, iColor, iFigure); RETURN TRUE; ELSE END; | Windows.WM_PAINT : PaintTheBlock (hCtrlBlock, iColor, iFigure); ELSE RETURN FALSE; END; RETURN FALSE; END AboutDlgProc; (*++++*****************************************************************) PROCEDURE [Windows.CALLBACK] WndProc (hwnd : Windows.HWND; (**********************************************************************) iMsg : Windows.UINT; wParam : Windows.WPARAM; lParam : Windows.LPARAM) : Windows.LRESULT; VAR ps : Windows.PAINTSTRUCT; BEGIN CASE (iMsg) OF | Windows.WM_CREATE : (* hInstance := ((PCREATESTRUCT) lParam)^.hInstance; *) hInstance := Windows.MyInstance(); RETURN 0; | Windows.WM_COMMAND : CASE (Windows.LOWORD (wParam)) OF | h2d_about2.IDM_ABOUT : IF (Windows.DialogBox (hInstance, "AboutBox", hwnd, AboutDlgProc)=1) THEN Windows.InvalidateRect (hwnd, NIL, TRUE); END; RETURN 0; ELSE RETURN 0; END; | Windows.WM_PAINT : Windows.BeginPaint (hwnd, ps); Windows.EndPaint (hwnd, ps); PaintWindow (hwnd, iCurrentColor, iCurrentFigure); RETURN 0; | Windows.WM_DESTROY : 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(wc); 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 (wc.hInstance,szAppName); wc.hCursor := Windows.LoadCursor (NIL, Windows.IDC_ARROW); wc.hbrBackground := SYSTEM.CAST(Windows.HBRUSH,Windows.GetStockObject(Windows.WHITE_BRUSH)); wc.lpszMenuName := SYSTEM.ADR(szAppName); wc.lpszClassName := SYSTEM.ADR(szAppName); wc.hIconSm := Windows.LoadIcon (wc.hInstance,szAppName); rc := Windows.RegisterClassEx(wc); RETURN rc#0; END InitApplication; (*++++*****************************************************************) PROCEDURE InitMainWindow () : BOOLEAN; (**********************************************************************) BEGIN hwnd := Windows.CreateWindow (szAppName, "About Box Demo Program #2: 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 iCurrentColor := h2d_about2.IDD_BLACK; iCurrentFigure := h2d_about2.IDD_RECT; crColor := COLORREFARRAY { Windows.RGB (0, 0, 0), Windows.RGB ( 0, 0, 255), Windows.RGB (0, 255, 0), Windows.RGB ( 0, 255, 255), Windows.RGB (255, 0, 0), Windows.RGB (255, 0, 255), Windows.RGB (255, 255, 0), Windows.RGB (255, 255, 255) }; IF InitApplication() AND InitMainWindow() THEN WHILE (Windows.GetMessage(msg,NIL,0,0)) DO Windows.TranslateMessage(msg); Windows.DispatchMessage(msg); END; END; END About2.