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Borland C++ V5.02
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CMDENABL.PAK
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CMDENAB3.CPP
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C/C++ Source or Header
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1997-05-06
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// ---------------------------------------------------------------------------
// ObjectWindows
// Copyright (C) 1994, 1995 by Borland International, All Rights Reserved
//
// Command-enabling sample application
// Third version implements check marks on the toggle functions.
//----------------------------------------------------------------------------
#include <owl/pch.h>
#include <owl/applicat.h>
#include <owl/framewin.h>
#include "cmdenabl.h"
//
// class TCmdEnableApp
// ~~~~~ ~~~~~~~~~~~~~
// Application object initializes TApplication, overrides InitMainWindow.
class TCmdEnableApp : public TApplication {
public:
TCmdEnableApp() : TApplication() {}
protected:
void InitMainWindow();
};
//
// class TCmdEnableWindow
// ~~~~~ ~~~~~~~~~~~~~~~~
// Window object initializes TWindow, adds four event handlers,
// adds response table for four events.
//
class TCmdEnableWindow : public TWindow {
public:
TCmdEnableWindow(TWindow* parent = 0);
protected:
// Event handlers
//
void CmFileNew();
void CmFileOpen();
void CmFileSave();
void CmFileSaveAs();
void CmToggleDirty();
void CmToggleNew();
void CmShowState();
// Command-enabling functions
//
void CeFileNew(TCommandEnabler&);
void CeFileOpen(TCommandEnabler&);
void CeFileSave(TCommandEnabler&);
void CeToggleDirty(TCommandEnabler&);
void CeToggleNew(TCommandEnabler&);
bool IsDirty;
bool IsNewFile;
DECLARE_RESPONSE_TABLE(TCmdEnableWindow);
};
//
//
//
DEFINE_RESPONSE_TABLE1(TCmdEnableWindow, TWindow)
EV_COMMAND(CM_FILENEW, CmFileNew),
EV_COMMAND(CM_FILEOPEN, CmFileOpen),
EV_COMMAND(CM_FILESAVE, CmFileSave),
EV_COMMAND(CM_FILESAVEAS, CmFileSaveAs),
EV_COMMAND(CM_TOGGLEDIRTY, CmToggleDirty),
EV_COMMAND(CM_TOGGLENEW, CmToggleNew),
EV_COMMAND(CM_SHOWSTATE, CmShowState),
EV_COMMAND_ENABLE(CM_FILENEW, CeFileNew),
EV_COMMAND_ENABLE(CM_FILEOPEN, CeFileOpen),
EV_COMMAND_ENABLE(CM_FILESAVE, CeFileSave),
EV_COMMAND_ENABLE(CM_TOGGLEDIRTY, CeToggleDirty),
EV_COMMAND_ENABLE(CM_TOGGLENEW, CeToggleNew),
END_RESPONSE_TABLE;
//
// TCmdEnableApp::InitMainWindow
//
void
TCmdEnableApp::InitMainWindow()
{
// Construct the frame window
//
TFrameWindow* frame = new TFrameWindow(0, "Command-enabling sample application",
new TCmdEnableWindow, true);
// Set the main window and its menu
//
SetMainWindow(frame);
GetMainWindow()->AssignMenu(MN_COMMANDS);
}
//
//
//
TCmdEnableWindow::TCmdEnableWindow(TWindow* parent)
:
TWindow(parent),
IsNewFile(true),
IsDirty(false)
{
}
//
//
//
void
TCmdEnableWindow::CmFileNew()
{
IsDirty = false;
IsNewFile = true;
MessageBox("Opened a new file.\nIsDirty=false\nIsNewFile=true",
"File action taken");
}
//
//
//
void
TCmdEnableWindow::CmFileOpen()
{
IsDirty = false;
IsNewFile = false;
MessageBox("Opened an existing file.\nIsDirty=false\nIsNewFile=false",
"File action taken");
}
//
//
//
void
TCmdEnableWindow::CmFileSave()
{
IsDirty = false;
IsNewFile = false;
MessageBox("Saved an existing file.\nIsDirty=false\nIsNewFile=false",
"File action taken");
}
//
//
//
void
TCmdEnableWindow::CmFileSaveAs()
{
IsDirty = false;
IsNewFile = false;
MessageBox("Saved a file under a new name.\nIsDirty=false\nIsNewFile=false",
"File action taken");
}
//
//
//
void
TCmdEnableWindow::CmToggleDirty()
{
IsDirty=!IsDirty;
}
//
//
//
void
TCmdEnableWindow::CmToggleNew()
{
IsNewFile=!IsNewFile;
}
//
//
//
void
TCmdEnableWindow::CmShowState()
{
string str(IsDirty ? "IsDirty = true\n" : "IsDirty = false\n");
str += (IsNewFile ? "IsNewFile = true" : "IsNewFile = false");
MessageBox(str.c_str(), "Current state");
}
//
//
//
void
TCmdEnableWindow::CeFileNew(TCommandEnabler& ce)
{
// Enable CmFileNew if not dirty
//
ce.Enable(!IsDirty);
}
//
//
//
void
TCmdEnableWindow::CeFileOpen(TCommandEnabler& ce)
{
// Enable CmFileOpen if not dirty
//
ce.Enable(!IsDirty);
}
//
//
//
void
TCmdEnableWindow::CeFileSave(TCommandEnabler& ce)
{
// Enable CmFileSave if not new file and is dirty.
//
ce.Enable(!IsNewFile && IsDirty);
}
//
//
//
void
TCmdEnableWindow::CeToggleDirty(TCommandEnabler& ce)
{
ce.SetCheck(IsDirty ? TCommandEnabler::Checked : TCommandEnabler::Unchecked);
}
//
//
//
void
TCmdEnableWindow::CeToggleNew(TCommandEnabler& ce)
{
ce.SetCheck(IsNewFile ? TCommandEnabler::Checked : TCommandEnabler::Unchecked);
}
//
// Put the OwlMain here just to get it out of the way
//
int
OwlMain(int /*argc*/, char* /*argv*/ [])
{
return TCmdEnableApp().Run();
}