//*****
// THIS PROGRAM illustrates the editing of messages using a set of C++ control objects
// Particularly powerful is the CEdit class of objects, which is demonstrated here.
// This object has cut/paste/copy built in
// Because the MsgFolder is not implemented yet, the user must type in the name of the
// Message file
// This version also implements HOT SPOTS on the main window which simulate the
// actions of the three buttons.
// ILLUSTRATES: 
//		1) some primitive drawing to identify the hot spots
//		2) Handling of Mouse Clicks
//		3) Sending of Messages within an application (hot spot sends button message)
// Shows somewhat disconnected relationship between message handlers and message generators
//
// Also should really define a focus order to be able to tab between edit areas. - next time
// AUTHOR: Chris Wild
// DATE: September 15. 1997

#include "main.h"
#include <iostream.h>
// Create an instance of the application

CMsgApp msgApp;  

// Init the application and the main window
BOOL CMsgApp::InitInstance()
{
	m_pMainWnd = new CMainWindow();
	m_pMainWnd->ShowWindow(m_nCmdShow);
	m_pMainWnd->UpdateWindow();
	return TRUE;
}

// Message map - maps message IDs to their handlers
BEGIN_MESSAGE_MAP( CMainWindow, CWnd )
	ON_COMMAND(IDC_SAVE, HandleSave)
	ON_COMMAND(IDC_CLEAR, HandleClear)
	ON_COMMAND(IDC_LOAD, HandleLoad)
	ON_WM_LBUTTONUP()
	ON_WM_PAINT()
END_MESSAGE_MAP()

// Window constructor
CMainWindow::CMainWindow()
{ 
	// Create the window
	Create(NULL, "Edit Message Demo", 
		WS_OVERLAPPED | WS_MINIMIZEBOX | WS_SYSMENU,
		CRect(0,0,500,750));
	MakeDlg(); // create edit control windows
}
CMainWindow::~CMainWindow()
{
}

void CMainWindow::MakeDlg()
{ 
	CRect rect;	// used to get size of window

	GetClientRect(&rect);	// get size of window
	// Create the labels
	m_msgIDTitle.Create("Message ID", 
		WS_CHILD|WS_VISIBLE,
		CRect(CPoint(0,0),CSize(150,24)),
		this);
	m_topicTitle.Create("Message Topic",
		WS_CHILD|WS_VISIBLE,
		CRect(CPoint(0,60),CSize(150,24)),
		this);
	m_textTitle.Create("Message Text",
		WS_CHILD|WS_VISIBLE,
		CRect(CPoint(0,120),CSize(150,24)),
		this);

	// Create the edit controls

	// For demo let user type in message file name
	m_msgID.Create(
		WS_CHILD|WS_VISIBLE|WS_BORDER|WS_TABSTOP,
		CRect(CPoint(50,30),CSize(440,24)),
		this, IDC_MSGID);
	m_msgID.LimitText(10);
	// topic edit area
	m_topic.Create(
		WS_CHILD|WS_VISIBLE|WS_BORDER|WS_TABSTOP,
		CRect(CPoint(50,90),CSize(440,24)),
		this, IDC_TOPIC);
	m_topic.LimitText(SIZE_TOPIC);
	// text edit area
	m_text.Create(
		WS_CHILD|WS_VISIBLE|WS_BORDER|WS_TABSTOP|WS_VSCROLL|ES_MULTILINE,
		CRect(CPoint(50,150),CSize(440,450)),
		this, IDC_TEXT);
	m_text.LimitText(SIZE_TEXT);
	
	// Create buttons
	m_save.Create("&Save",
		WS_CHILD|WS_VISIBLE|WS_TABSTOP|BS_PUSHBUTTON,
		CRect(CPoint(0,600),CSize(100,50)),
		this, IDC_SAVE);
	m_load.Create("&Load",
		WS_CHILD|WS_VISIBLE|WS_TABSTOP,
		CRect(CPoint(200,600),CSize(100,50)),
		this, IDC_LOAD);
	m_clear.Create("&Clear",
		WS_CHILD|WS_VISIBLE|WS_TABSTOP,
		CRect(CPoint(400,600),CSize(100,50)),
		this, IDC_CLEAR);
	m_topic.SetFocus();
}

// Handle the save button 
void CMainWindow::HandleSave()
// Saves the message
{
	CString topic;
	CString text;
	CString fileName;
	HANDLE msgFile;

	m_topic.GetWindowText(topic);
	msgApp.msg.SetTopic((LPCTSTR)topic);
	m_text.GetWindowText(text);
	msgApp.msg.SetText((LPCTSTR)text);

	m_msgID.GetWindowText(fileName);
	msgFile = CreateFile(fileName,GENERIC_WRITE,0,0,CREATE_ALWAYS,0,0);
	if(msgFile == INVALID_HANDLE_VALUE) {
		cerr << "Error: " << GetLastError() <<
			" when creating file:" << fileName << endl;
		ExitProcess(1);
	}
	if(!msgApp.msg.WriteMsg(msgFile)) {
		cerr << " Error writing message msg1\n";
		ExitProcess(1);
	}
	CloseHandle(msgFile);


}

void CMainWindow::HandleLoad()
// Saves the message
{
	char topic[SIZE_TOPIC];
	char text[SIZE_TEXT];
	HANDLE msgFile;

	char fileName[SIZE_FILENAME+1];
	m_msgID.GetLine(0, fileName, SIZE_FILENAME);
	msgFile = CreateFile(fileName,GENERIC_READ,0,0,OPEN_EXISTING,0,0);
	if(msgFile == INVALID_HANDLE_VALUE) {
		cerr << "Error: " << GetLastError() <<
			" when opening file: " << fileName << endl;
		ExitProcess(1);
	}
	msgApp.msg.ReadMsg(msgFile);
	CloseHandle(msgFile);
	
	msgApp.msg.GetTopic(topic);
	msgApp.msg.GetText(text);

	m_topic.SetWindowText(topic);
	m_text.SetWindowText(text);
	

}
// Handle changes to any edit area
void CMainWindow::HandleClear()
// Handles Clearing of edit areas
{
	SetDlgItemText(IDC_TOPIC,"");
	SetDlgItemText(IDC_TEXT,"");
}

// Check to see if mouse click is in one of the Hot Spots
// If so, then send message to appropriate message handler
// THis simulates the action of pressing the appropriate buttons
void CMainWindow::OnLButtonUp(UINT nFlags, CPoint point)
{
	if(saveHotSpot.PtInRect(point))
		SendMessage(WM_COMMAND,IDC_SAVE, NULL);
	if(loadHotSpot.PtInRect(point))
		SendMessage(WM_COMMAND,IDC_LOAD, NULL);
	if(clearHotSpot.PtInRect(point))
		SendMessage(WM_COMMAND,IDC_CLEAR, NULL);
}

// Repaint the hot spots
void CMainWindow::OnPaint()
{
	CPaintDC dc(this);
	CBrush* pOldBrush; // to restore vurrent brush
	CBrush redBrush (RGB(255,0,0));
	CBrush greenBrush(RGB(0,255,0));
	CBrush blueBrush(RGB(0,0,255));
	
	// Now identify the "hot buttons" areas of the window underneath the real buttons
	pOldBrush = dc.SelectObject(&redBrush);
	dc.Rectangle(saveHotSpot);
	dc.SelectObject(&greenBrush);
	dc.Rectangle(loadHotSpot);
	dc.SelectObject(&blueBrush);
	dc.Rectangle(clearHotSpot);
	dc.SelectObject(pOldBrush);
}