GraphFX - A graph framework

////////////////////////////////////////////////////////////////////////////////
// Developed by Norm Almond
//
// The software is free to use anywhere...
//
// Please see www.codeproject.com for updates...
//
////////////////////////////////////////////////////////////////////////////////


// GraphViewFX.cpp : implementation of the CGraphViewFX class
//

#include "stdafx.h"
#include "Graph.h"

#include "MainFrm.h"
#include "GraphViewFX.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////////
// CGraphViewFX

IMPLEMENT_DYNCREATE(CGraphViewFX, CView)

BEGIN_MESSAGE_MAP(CGraphViewFX, CView)
	//{{AFX_MSG_MAP(CGraphViewFX)
	ON_WM_SIZE()
	ON_WM_ERASEBKGND()
	ON_WM_MOUSEMOVE()
	ON_WM_CONTEXTMENU()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_MOUSEWHEEL()
	ON_WM_VSCROLL()
	ON_WM_KEYUP()
	ON_WM_SETCURSOR()
	ON_WM_LBUTTONUP()
	//}}AFX_MSG_MAP

    ON_NOTIFY_EX(TTN_NEEDTEXT, 0, OnToolTipNeedText)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CGraphViewFX construction/destruction

CGraphViewFX::CGraphViewFX()
{	
	m_pItem = NULL;
	m_pSelectedItem = NULL;
	
	LOGFONT lf;
	::GetObject((HFONT)GetStockObject(DEFAULT_GUI_FONT),sizeof(lf),&lf);
	m_font.CreateFontIndirect(&lf);
	m_fontSmall.CreateFontIndirect(&lf);

	lf.lfWeight = FW_BOLD;
	m_fontSelect.CreateFontIndirect(&lf);
}


CGraphViewFX::~CGraphViewFX()
{
	// Font we self destruct...

}


BOOL CGraphViewFX::PreCreateWindow(CREATESTRUCT& cs)
{
	cs.style |= WS_CLIPCHILDREN;

	return CView::PreCreateWindow(cs);
}

void CGraphViewFX::OnInitialUpdate()
{
	CView::OnInitialUpdate();

	if (m_ToolTip.Create(this, TTS_ALWAYSTIP) && m_ToolTip.AddTool(this))
	{
		m_ToolTip.SendMessage(TTM_SETMAXTIPWIDTH, 0, SHRT_MAX);
		m_ToolTip.SendMessage(TTM_SETDELAYTIME, TTDT_AUTOPOP, SHRT_MAX);
		m_ToolTip.SendMessage(TTM_SETDELAYTIME, TTDT_INITIAL, 200);
		m_ToolTip.SendMessage(TTM_SETDELAYTIME, TTDT_RESHOW, 200);
	}	


	m_wndScrollBar.Create(WS_CHILD|SBS_VERT,CRect(0,0,0,0),this,0x0000);

	CRect rc;
	GetClientRect(rc);

	// Fake a size message
	OnSize(0,rc.Width(),rc.Height());
}


/////////////////////////////////////////////////////////////////////////////
// CGraphViewFX diagnostics

/////////////////////////////////////////////////////////////////////////////
// CGraphViewFX message handlers



void CGraphViewFX::OnDraw(CDC* pDC)
{
	CRect rc;
	GetClientRect(rc);

	// Draw Graph
	Draw(rc, pDC, GetList(), GetItemsPerPage());
}

BOOL CGraphViewFX::OnEraseBkgnd(CDC* pDC) 
{
	pDC; // Unused

	return TRUE; // We draw our own background
}


void CGraphViewFX::OnSize(UINT nType, int cx, int cy) 
{
	CView::OnSize(nType, cx, cy);

	
	if (::IsWindow(m_wndScrollBar.m_hWnd))
	{
		

		int nLeft = cx - (RightMargin - 2);
		int nTop = TopLine;
		int nRight = cx;
		int nBottom = (GetItemsPerPage() * BarSize) + TopLine + 2;

		SCROLLINFO si;
		si.cbSize = sizeof(si);
		si.fMask = SIF_RANGE | SIF_PAGE;
		si.nMin = 0;
		si.nMax = GetList()->GetSize() - 1;
		si.nPage = GetItemsPerPage();

		// Position  Scroll Bar
		CRect rect(nLeft, nTop, nRight, nBottom);
		m_wndScrollBar.SetScrollInfo(&si,TRUE);
		m_wndScrollBar.MoveWindow(rect);
		
		if (UINT(si.nMax) < si.nPage)
			m_wndScrollBar.ShowScrollBar(FALSE);
		else
			m_wndScrollBar.ShowScrollBar(TRUE);

	}
}



BOOL CGraphViewFX::OnToolTipNeedText(UINT id, NMHDR * pNMHDR, LRESULT * pResult)
{
	pResult;	// Unused
	id;			// Unused


	CPoint CursorPos;
	VERIFY(::GetCursorPos(&CursorPos));
	ScreenToClient(&CursorPos);

	CRect ClientRect;
	GetClientRect(ClientRect);

	// Make certain that the cursor is in the client rect, because the
	// mainframe also wants these messages to provide tooltips for the
	// toolbar.
	BOOL bProcessed = FALSE;

	if (ClientRect.PtInRect(CursorPos))
	{
		TOOLTIPTEXT *pTTT = (TOOLTIPTEXT *)pNMHDR;

		m_pItem = GetList()->HitTest(CursorPos);

		if (m_pItem)
		{
			// Adjust the text by filling in TOOLTIPTEXT
			CString strTip;
			strTip.Format(_T("%s"),m_pItem->GetTipText());
			ASSERT(strTip.GetLength() < sizeof(pTTT->szText));
			::_tcscpy(pTTT->szText, strTip);

			bProcessed = TRUE;

			// Set the text color to same color as you wish...
			//m_ToolTip.SendMessage(TTM_SETTIPTEXTCOLOR, Color, 0L);
		}

		if (!bProcessed)
			pTTT->szText[0] = 0;
		
	}
	return TRUE; // Always return true
}

void CGraphViewFX::OnMouseMove(UINT nFlags, CPoint point) 
{
	nFlags; // Unused

	CItemArray* pItemList = GetList();

	CItem* pItem = pItemList->HitTest(point);

	if (!pItem || pItem != m_pItem)
	{
		// Use Activate() to hide the tooltip.
		m_ToolTip.Activate(FALSE);		
	}

	if (pItem)
	{
		m_ToolTip.Activate(TRUE);
		m_pItem = pItem;
	}	
}

BOOL CGraphViewFX::PreTranslateMessage(MSG* pMsg) 
{
	if (::IsWindow(m_ToolTip.m_hWnd) && pMsg->hwnd == m_hWnd)
	{
		switch(pMsg->message)
		{
		case WM_LBUTTONDOWN:	
		case WM_MOUSEMOVE:
		case WM_LBUTTONUP:	
		case WM_RBUTTONDOWN:
		case WM_MBUTTONDOWN:	
		case WM_RBUTTONUP:
		case WM_MBUTTONUP:
			m_ToolTip.RelayEvent(pMsg);
			break;
		}
	}
	
	return CView::PreTranslateMessage(pMsg);
}

//
// This computes the number of items visible on the page
//
UINT CGraphViewFX::GetItemsPerPage()
{
	CRect rc;
	GetClientRect(rc);

	int nWidth = rc.Height() - TopLine;
	int nItemsPerPage = (nWidth / BarSize) - 1;

	return nItemsPerPage;

}


//
// This is code to handle selected items
//
void CGraphViewFX::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CItemArray* pItemList = GetList();

	CItem* pItem = pItemList->HitTest(point);

	if (pItem && m_pSelectedItem != pItem)
	{
		if (m_pSelectedItem)
			m_pSelectedItem->Unselect();
		
		m_pSelectedItem  = pItem;
		m_pSelectedItem->Select();
	}

	CView::OnLButtonDown(nFlags, point);
}

//
// Always use to use the thumb wheel
//

BOOL CGraphViewFX::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt) 
{
	if (zDelta > 0)
		SendMessage(WM_VSCROLL,SB_LINEUP,0);

	if (zDelta < 0)
		SendMessage(WM_VSCROLL,SB_LINEDOWN,0);

	
	return CView::OnMouseWheel(nFlags, zDelta, pt);
}


CItemArray* CGraphViewFX::GetList()
{
	return &m_ItemList;
}



void CGraphViewFX::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{

	SCROLLINFO si;
	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	m_wndScrollBar.GetScrollInfo(&si);

	switch (nSBCode)
	{
	case SB_TOP:
		si.nPos = si.nMin;
		break;
	case SB_BOTTOM:
		si.nPos = si.nMax;
		break;
	case SB_LINEDOWN:
		si.nPos += 1;
		break;
	case SB_LINEUP:
		si.nPos -= 1;
		break;
	case SB_PAGEUP:
		si.nPos -= si.nPage;
		break;
	case SB_PAGEDOWN:
		si.nPos += si.nPage;
		break;
	case SB_THUMBTRACK:
		si.nPos = si.nTrackPos;
		break;
	}

	si.fMask = SIF_POS;
	m_wndScrollBar.SetScrollInfo(&si,TRUE);
	Invalidate();

	
	CView::OnVScroll(nSBCode, nPos, pScrollBar);
}

int CGraphViewFX::GetScrollPos()
{
	SCROLLINFO si;
	si.fMask = SIF_ALL;
	m_wndScrollBar.GetScrollInfo(&si);

	return si.nPos;
}

void CGraphViewFX::SetScrollPos(int nPos)
{
	SCROLLINFO si;
	si.cbSize = sizeof(si);
	si.fMask = SIF_ALL;
	m_wndScrollBar.GetScrollInfo(&si);

	si.nPos = nPos;
	si.fMask = SIF_POS;
	m_wndScrollBar.SetScrollInfo(&si,TRUE);
}