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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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v_13_09
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welstead
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cwdlg.cpp
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C/C++ Source or Header
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1995-05-20
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4KB
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148 lines
// File CWDLG.CPP Dialog classes
#include <stdio.h>
#include <string.h>
#include "cwdlg.h"
#include "dlgids.h"
HINSTANCE gdlg_instance = 0;
// This must be set to current instance before
// using any dialogs.
int check_gdlg_instance () {
if (!gdlg_instance) {
MessageBox (NULL,"gdlg_instance not set.",
"UWDLG.CPP",MB_ICONEXCLAMATION | MB_OK);
return 0; }
return 1; }
tdialog *this_dialog = 0;
BOOL CALLBACK _export tdialog_proc(HWND hdlg,
UINT message,WPARAM wParam, LPARAM lParam) {
return this_dialog->handle_message(hdlg,message,
wParam,lParam); }
tdialog::tdialog (HWND Parent,LPCSTR resource_name,
LPCSTR caption_name) {
hwndParent = Parent;
rc_title = resource_name;
caption_title = caption_name; }
void tdialog::center_dialog () {
RECT dlg_rect;
int x_screen = GetSystemMetrics(SM_CXSCREEN),
y_screen = GetSystemMetrics(SM_CYSCREEN);
GetWindowRect (hdialog,&dlg_rect);
int dlg_width = dlg_rect.right - dlg_rect.left,
dlg_ht = dlg_rect.bottom - dlg_rect.top;
int x_pos = (x_screen - dlg_width)/2,
y_pos = (y_screen - dlg_ht)/2;
SetWindowPos (hdialog,NULL,x_pos,y_pos,0,0,
SWP_NOSIZE|SWP_NOZORDER);}
BOOL tdialog::respond_wm_initdialog () {
center_dialog();
return 1;}
BOOL tdialog::respond_wm_command (WPARAM wParam,LPARAM) {
switch (LOWORD(wParam)) {
case IDOK:
dlg_return_value = 1;
EndDialog(hdialog, TRUE);
return 1;
case IDCANCEL:
dlg_return_value = 0;
EndDialog(hdialog,FALSE);
return 0;
} // end switch
return 0; }
BOOL tdialog::handle_message (HWND hwnd,UINT message,
WPARAM wParam,LPARAM lParam) {
hdialog = hwnd; // hdialog must be set before any
// handling any messages
switch (message) {
case WM_INITDIALOG:
return respond_wm_initdialog ();
case WM_COMMAND:
return respond_wm_command (wParam,lParam);
} // end switch
return FALSE; }
BOOL tdialog::exec_dialog () {
if (!check_gdlg_instance()) return 0;
tdialog *old_tdialog = this_dialog;
this_dialog = this;
lpDialogProc =
(DLGPROC)MakeProcInstance((FARPROC)tdialog_proc,
gdlg_instance);
DialogBox(gdlg_instance,rc_title, hwndParent,
lpDialogProc);
FreeProcInstance((FARPROC)lpDialogProc);
this_dialog = old_tdialog;
return dlg_return_value; }
tdialog::~tdialog() { }
tinput_dialog *this_input_dialog = 0;
BOOL CALLBACK _export tinput_dialog_proc(HWND hdlg,
UINT message,WPARAM wParam, LPARAM lParam) {
return this_input_dialog->handle_message(hdlg,
message,wParam,lParam); }
tinput_dialog::tinput_dialog (HWND Parent,
LPCSTR caption_name,LPCSTR input_name,
LPCSTR init_text):tdialog(Parent,
"INPUT_DIALOG",caption_name){
input_id = ID_DLG_INPUT;
input_caption_id = ID_DLG_INPUT_CAPTION;
input_caption = input_name;
strncpy (input_text,init_text,MAX_INPUT_LENGTH);
input_text[MAX_INPUT_LENGTH] = '\0'; };
BOOL tinput_dialog::respond_wm_initdialog () {
SetWindowText (hdialog,caption_title);
SetWindowText (GetDlgItem(hdialog,
input_caption_id),input_caption);
SetWindowText(GetDlgItem(hdialog,input_id),
input_text);
SetFocus(GetDlgItem(hdialog,input_id));
return tdialog::respond_wm_initdialog();}
BOOL tinput_dialog::respond_wm_command (WPARAM wParam,
LPARAM) {
switch (LOWORD(wParam)) {
case IDOK:
GetDlgItemText(hdialog,input_id,input_text,
MAX_INPUT_LENGTH);
dlg_return_value = 1;
EndDialog(hdialog, TRUE);
return 1;
case IDCANCEL:
dlg_return_value = 0;
EndDialog(hdialog,FALSE);
return 0;
} // end switch
return 0; }
BOOL tinput_dialog::exec_dialog () {
if (!check_gdlg_instance()) return 0;
tinput_dialog *old_tinput_dialog =
this_input_dialog;
this_input_dialog = this;
lpDialogProc =
(DLGPROC)MakeProcInstance(
(FARPROC)tinput_dialog_proc,gdlg_instance);
DialogBox(gdlg_instance,rc_title, hwndParent,
lpDialogProc);
FreeProcInstance((FARPROC)lpDialogProc);
this_input_dialog = old_tinput_dialog;
return dlg_return_value; }
tinput_dialog::~tinput_dialog() { }