VividTree - A Colorful and Picturesque Owner Drawn CTreeCtrl Class

///////////////////////////////////////////////////////////////////////////
// TreeTestDlg.cpp : Implementation of Class TreeTestDlg
///////////////////////////////////////////////////////////////////////////
//
// Copyright(C) 2005 Jim Alsup  All rights reserved
//              email: ja.alsup@gmail.com
//
// License: This code is provided "as is" with no expressed or implied 
//         warranty. You may use, or derive works from this file without
//          any restrictions except those listed below.
//
//        - This original header must be kept in the derived work.
//
//        - If your derived work is distributed in any form, you must
//          notify the author via the email address above and provide a 
//          short description of the product and intended audience.  
//
//        - You may not sell this code or a derived version of it as part of 
//          a comercial code library. 
//
//        - Offering the author a free licensed copy of any end product 
//          using this code is not required, but does endear you with a 
//          bounty of good karma.
//
///////////////////////////////////////////////////////////////////////////


#include "stdafx.h"
#include "VividTree.h"
#include "TreeTest.h"
#include "TreeTestDlg.h"
#include "Options.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CTreeTestDlg dialog



CTreeTestDlg::CTreeTestDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CTreeTestDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CTreeTestDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_TREETEST, m_tree);
}

BEGIN_MESSAGE_MAP(CTreeTestDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
	ON_WM_ERASEBKGND()
	ON_WM_CONTEXTMENU()
END_MESSAGE_MAP()


// CTreeTestDlg message handlers

BOOL CTreeTestDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	// when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// Setup VividTree BackGround bitmap (bitmap resource id)
	m_tree.SetBitmapID( IDB_CODE_PROJECT );
	// Override the default background mode to use a bitmap
	m_background_mode = VividTree::BK_MODE_BMP;
	m_tree.SetBkMode( m_background_mode );

	// Add a couple of pixels to the height (optional)
	// m_tree.SetItemHeight( m_tree.GetItemHeight() + 2 );

	// Setup a default tree leaf icon - in this case the code project alien is used
	m_icon = (HICON)LoadImage( AfxGetApp()->m_hInstance, MAKEINTRESOURCE(IDI_CODE_PROJECT), 
		IMAGE_ICON,	16, 16, LR_VGACOLOR );
	m_tree.SetItemIcon( m_icon );

	// Create the Tree content (fill in some dummy data).
	TV_INSERTSTRUCT TreeItem;
	TV_INSERTSTRUCT curTreeItem;
	HTREEITEM hParent;

	TreeItem.hParent = NULL; 
	TreeItem.hInsertAfter = TVI_LAST ;
	TreeItem.itemex.mask = TVIF_TEXT | TVIF_CHILDREN; 
	TreeItem.itemex.pszText = "Root Node 1";
	TreeItem.itemex.cChildren = 1;
	TreeItem.hParent = m_tree.InsertItem(&TreeItem);

	curTreeItem.hParent = TreeItem.hParent; 
	curTreeItem.itemex.mask = TVIF_TEXT; 
	curTreeItem.itemex.cChildren = 0;
	curTreeItem.hInsertAfter = TVI_FIRST;
	curTreeItem.itemex.pszText = "Child 1";
	m_tree.InsertItem( &curTreeItem );
	curTreeItem.itemex.pszText = "Child 2";
	m_tree.InsertItem( &curTreeItem );

	curTreeItem.itemex.pszText = "Parent A";
	curTreeItem.itemex.cChildren = 1;
	hParent = m_tree.InsertItem( &curTreeItem );

	curTreeItem.itemex.cChildren = 0;
	curTreeItem.hParent = hParent; 
	curTreeItem.itemex.pszText = "Child A - with a long long name";
	m_tree.InsertItem( &curTreeItem );
	m_tree.Expand( TreeItem.hParent, TVE_EXPAND );
	m_tree.Expand( hParent, TVE_EXPAND );

	TreeItem.hParent = NULL; 
	TreeItem.hInsertAfter = TVI_LAST;
	TreeItem.itemex.mask = TVIF_TEXT | TVIF_CHILDREN; 
	TreeItem.itemex.pszText = "Root Node 2";
	TreeItem.itemex.cChildren = 1;
	TreeItem.hParent = m_tree.InsertItem(&TreeItem);

	curTreeItem.hParent = TreeItem.hParent; 
	curTreeItem.itemex.pszText = "Child 1";
	m_tree.InsertItem( &curTreeItem );
	m_tree.Expand( TreeItem.hParent, TVE_EXPAND );

	// Cover the client area with the tree
	CRect rect;
	GetClientRect( rect );
	m_tree.MoveWindow( 0, 0, rect.Width(), rect.Height() );

	return TRUE;  // return TRUE  unless you set the focus to a control
}


void CTreeTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}


// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.
void CTreeTestDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}


// The system calls this function to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CTreeTestDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}


void CTreeTestDlg::OnSize(UINT nType, int cx, int cy)
{
	CDialog::OnSize(nType, cx, cy);
	if ( !IsWindowVisible() )
		return;
	// Size the tree to fit the whole window
	m_tree.MoveWindow( 0, 0, cx, cy, TRUE );
}


BOOL CTreeTestDlg::OnEraseBkgnd(CDC* pDC)
{
	// Override to prevent flicker from drawing background
	return TRUE; // CDialog::OnEraseBkgnd(pDC);
}

void CTreeTestDlg::OnContextMenu(CWnd* /*pWnd*/, CPoint /*point*/)
{
	bool redraw_it = false;
	Options options;

	// WARNING: dialog radio buttons must in the same order as values defined
	// in the enum VividTree::BkMode. 
	options.m_bkground_mode = (int)(m_tree.GetBkMode()) - (int)(m_tree.BK_MODE_BMP);
	options.m_tiled = m_tree.GetBitmapTiledMode();
	options.m_horz = m_tree.GetGradientHorz();

	if ( options.DoModal() == IDOK )
	{
		// If any settings are different than they were, record the
		// new settings and redraw (invalidate).
		VividTree::BkMode new_mode = (VividTree::BkMode)(
			(int)(m_tree.BK_MODE_BMP) + options.m_bkground_mode );
		if ( m_tree.GetBkMode() != new_mode )
		{
			m_tree.SetBkMode( new_mode );
			redraw_it = true;
		}
		if ( m_tree.GetBitmapTiledMode() != (options.m_tiled ? true : false) )
		{
			m_tree.SetBitmapTiledMode( (options.m_tiled ? true : false) );
			redraw_it = true;
		}
		if ( m_tree.GetGradientHorz() != (options.m_horz ? true : false) )
		{
			m_tree.SetGradientHorz( (options.m_horz ? true : false) );
			redraw_it = true;
		}
		if ( redraw_it )
			Invalidate();  // redraw
	}
}