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105 lines
3.6 KiB
105 lines
3.6 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: dialog.cxx
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//
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// Contents:
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//
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// Classes: CHlprDialog
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//
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// Functions: DialogProc
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//
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// History: 4-12-94 stevebl Created
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//
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//----------------------------------------------------------------------------
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#include <windows.h>
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#include "cdialog.h"
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//+---------------------------------------------------------------------------
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//
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// Member: CHlprDialog::ShowDialog
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//
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// Synopsis: Creates the dialog so that it's DialogProc member function can
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// be invoked.
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//
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// Arguments: [hinst] - handle of the application instance
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// [lpszTemplate] - identifies the dialog box template
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// [hwndOwner] - handle of the owner window
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//
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// Returns: return value from the dialog box
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//
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// History: 4-12-94 stevebl Created
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//
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// Notes: The dialog box object exists until deleted by the caller.
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// It can be shown any number of times.
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//
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// This function is analgous to Windows' DialogBox function. The
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// main difference being that you don't specify a DialogProc;
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// you override the pure virtal function CHlprDialog::DialogProc.
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//
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//----------------------------------------------------------------------------
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int CHlprDialog::ShowDialog(HINSTANCE hinst, LPCTSTR lpszTemplate, HWND hwndOwner)
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{
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_hInstance = hinst;
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return(DialogBoxParam(hinst, lpszTemplate, hwndOwner, ::DialogProc, (long)this));
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}
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//+---------------------------------------------------------------------------
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//
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// Function: DialogProc
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//
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// Synopsis: Common DialogProc used by all CHlprDialog class objects.
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//
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// Arguments: [hwndDlg] - handle of dialog box
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// [uMsg] - message
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// [wParam] - first message parameter
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// [lParam] - second message parameter
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//
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// Returns: response from the CHlprDialog::DialogProc method
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//
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// History: 4-12-94 stevebl Created
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//
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// Notes: This procedure is the DialogProc registered for all dialogs
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// created with the CHlprDialog class. It uses the parameter
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// passed with the WM_INITDIALOG message to identify the dialog
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// classes' "this" pointer which it then stores in the window
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// structure's GWL_USERDATA field. All subsequent messages
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// can then be forwarded on to the correct dialog class's
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// DialogProc method by using the pointer stored in the
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// GWL_USERDATA field.
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//
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//----------------------------------------------------------------------------
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INT_PTR CALLBACK DialogProc(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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CHlprDialog * pdlg;
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switch (uMsg)
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{
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case WM_INITDIALOG:
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// This message is how we identify the dialog object.
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// get a pointer to the window class object
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pdlg = (CHlprDialog *) lParam;
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// set its USERDATA word to point to the class object
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SetWindowLong(hwndDlg, GWL_USERDATA, (long) pdlg);
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break;
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default:
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// get a pointer to the window class object
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pdlg = (CHlprDialog *) GetWindowLong(hwndDlg, GWL_USERDATA);
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break;
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}
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// and call its message proc method
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if (pdlg != (CHlprDialog *) 0)
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{
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return(pdlg->DialogProc(hwndDlg, uMsg, wParam, lParam));
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}
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else
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{
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return(FALSE);
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}
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}
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