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PC World Komputer 1998 May
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Pcwk5b98.iso
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Borland
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Cplus45
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BC45
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PROGMAN.PAK
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PROGMANX.CPP
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C/C++ Source or Header
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1995-08-29
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7KB
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240 lines
//----------------------------------------------------------------------------
// ObjectWindows - (C) Copyright 1991, 1993 by Borland International
//----------------------------------------------------------------------------
#include <owl\owlpch.h>
#include <owl\dialog.h>
#include <owl\framewin.h>
#include <owl\applicat.h>
#include <owl\listbox.h>
#include <owl\inputdia.h>
#include <string.h>
#include <ddeml.h>
#include "progmanx.h" // Dialog item IDs
//
// TDDEProgTalk is the main window of the application.
// It engages in a DDE conversation with the Program Manager
// to create program groups with a
// user specified list of program items.
//
// See DDEML example
class TDDEProgTalk : public TDialog{
public:
// Create a TListBox object to represent the
// dialog's list box.
//
TDDEProgTalk(TWindow* parent, TResId resId) :
TDialog(parent, resId),
CallBackProc((FARPROC)CallBack) {
ListBox = new TListBox(this, ID_LISTBOX);
}
~TDDEProgTalk();
private:
void SetupWindow();
void CmAddItem();
void CmDeleteItem();
void CmClearItems();
void CmCreateGroup();
void EvDDEAck(HWND hWnd, LONG lParam);
TListBox* ListBox;
//DDEML
static HDDEDATA FAR PASCAL _export CallBack(WORD, WORD, HCONV, HSZ, HSZ,
HDDEDATA, DWORD, DWORD);
DWORD InstId;
HCONV HConv;
HSZ Service;
HSZ Topic;
TProcInstance CallBackProc;
DECLARE_RESPONSE_TABLE(TDDEProgTalk);
};
static TDDEProgTalk* This = 0;
DEFINE_RESPONSE_TABLE1(TDDEProgTalk, TDialog)
EV_COMMAND(CM_ADDITEM, CmAddItem),
EV_COMMAND(CM_DELETEITEM, CmDeleteItem),
EV_COMMAND(CM_CLEARITEMS, CmClearItems),
EV_COMMAND(CM_CREATEGROUP, CmCreateGroup),
END_RESPONSE_TABLE;
TDDEProgTalk::~TDDEProgTalk()
{
// This clean up is required for those resources that were allocated during
// the DDEML conversation.
//
if (HConv)
DdeDisconnect(HConv); // Let the other party know we are leaving
if (InstId) {
DdeFreeStringHandle(InstId, Service);
DdeFreeStringHandle(InstId, Topic);
DdeUninitialize(InstId);
}
}
// SetupWindow is called right after the DDE window
// is created. Initiate the DDE conversation.
//
void
TDDEProgTalk::SetupWindow() {
InstId = 0; // MUST be 0 the first time DdeInitialize() is called!
HConv = 0;
Service = Topic = 0;
This = this;
TDialog::SetupWindow();
// The code below sets up the DDEML call back function that is used by the
// DDE Management Library to carry out data transfers between
// applications.
//
if (CallBackProc) {
if (DdeInitialize(&InstId, (PFNCALLBACK)(FARPROC)CallBackProc, APPCMD_CLIENTONLY, 0) == DMLERR_NO_ERROR) {
Service = DdeCreateStringHandle(InstId, "PROGMAN", CP_WINANSI);
Topic = DdeCreateStringHandle(InstId, "PROGMAN", CP_WINANSI);
if (!Service || !Topic) {
MessageBox("Creation of strings failed.", Title, MB_ICONSTOP);
PostQuitMessage(0);
}
} else {
MessageBox("Initialization failed.", Title, MB_ICONSTOP);
PostQuitMessage(0);
}
} else {
MessageBox("Setup of callback failed.", Title, MB_ICONSTOP);
PostQuitMessage(0);
}
}
//
// Add item button response method. Bring up the Add item dialog to
// input a program item string, and add that item to the list box.
//
void
TDDEProgTalk::CmAddItem()
{
char name[64] = "";
if (TInputDialog(this, "Add an Item to the Group", "Item &name:",
name, sizeof(name)).Execute() != IDCANCEL)
ListBox->AddString(name);
}
//
// Delete item button response method. Delete the currently selected
// item in the list box.
//
void
TDDEProgTalk::CmDeleteItem()
{
ListBox->DeleteString(ListBox->GetSelIndex());
}
//
// Clear items button response method. Clear the list box.
//
void
TDDEProgTalk::CmClearItems()
{
ListBox->ClearList();
}
//
// Create group button response method. Bring up the Create Group
// dialog to input the program group name.
//
void
TDDEProgTalk::CmCreateGroup()
{
char* createGroup = "[CreateGroup(%s)]";
char* addItem = "[AddItem(%s)]";
char name[64] = "";
if (TInputDialog(this,
"Create a new group", "&Name of new group:",
name, sizeof(name)).Execute() != IDCANCEL) {
// Connect to the prog manager
HConv = DdeConnect(InstId, Service, Topic, 0);
if (!HConv) {
MessageBox("Can't start conversation.\nMake sure PROGMAN is running.", Title, MB_ICONSTOP);
return;
}
// Subtract 2 for the '%s' in 'createGroup', plus 1 for null terminator.
//
int len = strlen(name) + strlen(createGroup) - 2 + 1;
int count = ListBox->GetCount();
for (int i = 0; i < count; i++)
// Subtract 2 for the '%s' in 'addItem'.
len += ListBox->GetStringLen(i) + strlen(addItem) - 2;
LPSTR commands = new char[len];
LPSTR ptr=commands;
wsprintf(ptr, createGroup, (LPSTR)name);
for (i = 0; i < count; i++) {
ListBox->GetString(name, i);
ptr += strlen(ptr);
wsprintf(ptr, addItem, (LPSTR)name);
}
//Send command to progman
if (DdeClientTransaction((LPBYTE)commands, len, HConv, 0L, CF_TEXT, XTYP_EXECUTE, 1000, 0))
ListBox->ClearList();
delete commands;
}
}
//
// This call back function is the heart of interaction between this program
// and DDEML. Because Windows doesn't pass C++ 'this' pointers to call
// back functions, a static 'this' pointer was used. If you wanted to
// create a Client that would allow for more than one conversation, using a
// List of conversations and their associated 'this' pointers would be one
// possible method to try. The XTYP_ constants are described in detail in
// the online help.
//
HDDEDATA FAR PASCAL _export
TDDEProgTalk::CallBack(WORD type, WORD, HCONV /*hConv*/, HSZ, HSZ, HDDEDATA /*hData*/,
DWORD, DWORD)
{
switch (type) {
case XTYP_DISCONNECT:
This->MessageBox("Disconnected.", This->Title, MB_ICONINFORMATION);
This->HConv = 0;
break;
case XTYP_ERROR:
This->MessageBox("A critical DDE error has occured.", This->Title, MB_ICONINFORMATION);
}
return 0;
}
//----------------------------------------------------------------------------
// TDdeApp is the application object. It creates a main window of type
// TDDEProgTalk.
//
class TDDEApp : public TApplication {
public:
TDDEApp() : TApplication() {}
void InitMainWindow() {
MainWindow = new TFrameWindow(0, "ProgTalk", new TDDEProgTalk(0, IDD_PROGTALK), TRUE);
}
};
int
OwlMain(int /*argc*/, char* /*argv*/ [])
{
return TDDEApp().Run();
}