[wxWidgets.git] / samples / fswatcher / fswatcher.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        samples/fswatcher/fswatcher.cpp
// Purpose:     wxFileSystemWatcher sample
// Author:      Bartosz Bekier
// Created:     2009-06-27
// RCS-ID:      $Id$
// Copyright:   (c) Bartosz Bekier
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif
#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#ifndef __WXMSW__
    #include "../sample.xpm"
#endif

#include "wx/fswatcher.h"
#include "wx/listctrl.h"
#include "wx/cmdline.h"

// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
public:
    MyFrame(const wxString& title);
    virtual ~MyFrame();

    // Add an entry of the specified type asking the user for the filename if
    // the one passed to this function is empty.
    void AddEntry(wxFSWPathType type, wxString filename = wxString());

    bool CreateWatcherIfNecessary();

private:
    // file system watcher creation
    void CreateWatcher();

    // event handlers
    void OnClear(wxCommandEvent& WXUNUSED(event)) { m_evtConsole->Clear(); }
    void OnQuit(wxCommandEvent& WXUNUSED(event)) { Close(true); }
    void OnWatch(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);

    void OnAdd(wxCommandEvent& event);
    void OnAddTree(wxCommandEvent& event);
    void OnRemove(wxCommandEvent& event);

    void OnFileSystemEvent(wxFileSystemWatcherEvent& event);
    void LogEvent(const wxFileSystemWatcherEvent& event);

    wxTextCtrl *m_evtConsole;         // events console
    wxListView *m_filesList;          // list of watched paths
    wxFileSystemWatcher* m_watcher;   // file system watcher

    const static wxString LOG_FORMAT; // how to format events
};

const wxString MyFrame::LOG_FORMAT = " %-12s %-36s    %-36s";

// Define a new application type, each program should derive a class from wxApp
class MyApp : public wxApp
{
public:
    // 'Main program' equivalent: the program execution "starts" here
    virtual bool OnInit()
    {
        if ( !wxApp::OnInit() )
            return false;

        wxLog::AddTraceMask("EventSource");
        wxLog::AddTraceMask(wxTRACE_FSWATCHER);

        // create the main application window
        m_frame = new MyFrame("File System Watcher wxWidgets App");

        // If we returned false here, the application would exit immediately.
        return true;
    }

    // create the file system watcher here, because it needs an active loop
    virtual void OnEventLoopEnter(wxEventLoopBase* WXUNUSED(loop))
    {
        if ( m_frame->CreateWatcherIfNecessary() )
        {
            if ( !m_dirToWatch.empty() )
                m_frame->AddEntry(wxFSWPath_Dir, m_dirToWatch);
        }
    }

    virtual void OnInitCmdLine(wxCmdLineParser& parser)
    {
        wxApp::OnInitCmdLine(parser);
        parser.AddParam("directory to watch",
                        wxCMD_LINE_VAL_STRING,
                        wxCMD_LINE_PARAM_OPTIONAL);
    }

    virtual bool OnCmdLineParsed(wxCmdLineParser& parser)
    {
        if ( !wxApp::OnCmdLineParsed(parser) )
            return false;

        if ( parser.GetParamCount() )
            m_dirToWatch = parser.GetParam();

        return true;
    }

private:
    MyFrame *m_frame;

    // The directory to watch if specified on the command line.
    wxString m_dirToWatch;
};

// Create a new application object: this macro will allow wxWidgets to create
// the application object during program execution (it's better than using a
// static object for many reasons) and also declares the accessor function
// wxGetApp() which will return the reference of the right type (i.e. MyApp and
// not wxApp)
IMPLEMENT_APP(MyApp)


// ============================================================================
// implementation
// ============================================================================

// frame constructor
MyFrame::MyFrame(const wxString& title)
    : wxFrame(NULL, wxID_ANY, title),
      m_watcher(NULL)
{
    SetIcon(wxICON(sample));

    // IDs for menu and buttons
    enum
    {
        MENU_ID_QUIT = wxID_EXIT,
        MENU_ID_CLEAR = wxID_CLEAR,
        MENU_ID_WATCH = 101,

        BTN_ID_ADD = 200,
        BTN_ID_ADD_TREE,
        BTN_ID_REMOVE
    };

    // ================================================================
    // menu

    // create a menu bar
    wxMenu *menuFile = new wxMenu;
    menuFile->Append(MENU_ID_CLEAR, "&Clear log\tCtrl-L");
    menuFile->AppendSeparator();
    menuFile->Append(MENU_ID_QUIT, "E&xit\tAlt-X", "Quit this program");

    // "Watch" menu
    wxMenu *menuMon = new wxMenu;
    wxMenuItem* it = menuMon->AppendCheckItem(MENU_ID_WATCH, "&Watch\tCtrl-W");
    // started by default, because file system watcher is started by default
    it->Check(true);

    // the "About" item should be in the help menu
    wxMenu *menuHelp = new wxMenu;
    menuHelp->Append(wxID_ABOUT, "&About\tF1", "Show about dialog");

    // now append the freshly created menu to the menu bar...
    wxMenuBar *menuBar = new wxMenuBar();
    menuBar->Append(menuFile, "&File");
    menuBar->Append(menuMon, "&Watch");
    menuBar->Append(menuHelp, "&Help");

    // ... and attach this menu bar to the frame
    SetMenuBar(menuBar);

    // ================================================================
    // upper panel

    // panel
    wxPanel *panel = new wxPanel(this);
    wxSizer *panelSizer = new wxGridSizer(2);
    wxBoxSizer *leftSizer = new wxBoxSizer(wxVERTICAL);

    // label
    wxStaticText* label = new wxStaticText(panel, wxID_ANY, "Watched paths");
    leftSizer->Add(label, wxSizerFlags().Center().Border(wxALL));

    // list of files
    m_filesList = new wxListView(panel, wxID_ANY, wxPoint(-1,-1),
                                 wxSize(300,200), wxLC_LIST | wxLC_SINGLE_SEL);
    leftSizer->Add(m_filesList, wxSizerFlags(1).Expand());

    // buttons
    wxButton* buttonAdd = new wxButton(panel, BTN_ID_ADD, "&Add");
    wxButton* buttonAddTree = new wxButton(panel, BTN_ID_ADD_TREE, "Add &tree");
    wxButton* buttonRemove = new wxButton(panel, BTN_ID_REMOVE, "&Remove");
    wxSizer *btnSizer = new wxGridSizer(2);
    btnSizer->Add(buttonAdd, wxSizerFlags().Center().Border(wxALL));
    btnSizer->Add(buttonAddTree, wxSizerFlags().Center().Border(wxALL));
    btnSizer->Add(buttonRemove, wxSizerFlags().Center().Border(wxALL));

    // and put it all together
    leftSizer->Add(btnSizer, wxSizerFlags(0).Expand());
    panelSizer->Add(leftSizer, wxSizerFlags(1).Expand());
    panel->SetSizerAndFit(panelSizer);

    // ================================================================
    // lower panel

    wxTextCtrl *headerText = new wxTextCtrl(this, wxID_ANY, "",
                                            wxDefaultPosition, wxDefaultSize,
                                            wxTE_READONLY);
    wxString h = wxString::Format(LOG_FORMAT, "event", "path", "new path");
    headerText->SetValue(h);

    // event console
    m_evtConsole = new wxTextCtrl(this, wxID_ANY, "",
                               wxDefaultPosition, wxSize(200,200),
                               wxTE_MULTILINE|wxTE_READONLY|wxHSCROLL);

    // set monospace font to have output in nice columns
    wxFont font(9, wxFONTFAMILY_TELETYPE,
                wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
    headerText->SetFont(font);
    m_evtConsole->SetFont(font);

    // ================================================================
    // laying out whole frame

    wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
    sizer->Add(panel, wxSizerFlags(1).Expand());
    sizer->Add(headerText, wxSizerFlags().Expand());
    sizer->Add(m_evtConsole, wxSizerFlags(1).Expand());
    SetSizerAndFit(sizer);

    // set size and position on screen
    SetSize(800, 600);
    CentreOnScreen();

    // ================================================================
    // event handlers & show

    // menu
    Connect(MENU_ID_CLEAR, wxEVT_COMMAND_MENU_SELECTED,
            wxCommandEventHandler(MyFrame::OnClear));
    Connect(MENU_ID_QUIT, wxEVT_COMMAND_MENU_SELECTED,
            wxCommandEventHandler(MyFrame::OnQuit));
    Connect(MENU_ID_WATCH, wxEVT_COMMAND_MENU_SELECTED,
            wxCommandEventHandler(MyFrame::OnWatch));
    Connect(wxID_ABOUT, wxEVT_COMMAND_MENU_SELECTED,
            wxCommandEventHandler(MyFrame::OnAbout));

    // buttons
    Connect(BTN_ID_ADD, wxEVT_COMMAND_BUTTON_CLICKED,
            wxCommandEventHandler(MyFrame::OnAdd));
    Connect(BTN_ID_ADD_TREE, wxEVT_COMMAND_BUTTON_CLICKED,
            wxCommandEventHandler(MyFrame::OnAddTree));
    Connect(BTN_ID_REMOVE, wxEVT_COMMAND_BUTTON_CLICKED,
            wxCommandEventHandler(MyFrame::OnRemove));

    // and show itself (the frames, unlike simple controls, are not shown when
    // created initially)
    Show(true);
}

MyFrame::~MyFrame()
{
    delete m_watcher;
}

bool MyFrame::CreateWatcherIfNecessary()
{
    if (m_watcher)
        return false;

    CreateWatcher();
    Connect(wxEVT_FSWATCHER,
            wxFileSystemWatcherEventHandler(MyFrame::OnFileSystemEvent));

    return true;
}

void MyFrame::CreateWatcher()
{
    wxCHECK_RET(!m_watcher, "Watcher already initialized");
    m_watcher = new wxFileSystemWatcher();
    m_watcher->SetOwner(this);
}

// ============================================================================
// event handlers
// ============================================================================

void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
    wxMessageBox("Demonstrates the usage of file system watcher, "
                 "the wxWidgets monitoring system notifying you of "
                 "changes done to your files.\n"
                 "(c) 2009 Bartosz Bekier\n",
                 "About wxWidgets File System Watcher Sample",
                 wxOK | wxICON_INFORMATION, this);
}

void MyFrame::OnWatch(wxCommandEvent& event)
{
    wxLogDebug("%s start=%d", __WXFUNCTION__, event.IsChecked());

    if (event.IsChecked())
    {
        wxCHECK_RET(!m_watcher, "Watcher already initialized");
        CreateWatcher();
    }
    else
    {
        wxCHECK_RET(m_watcher, "Watcher not initialized");
        m_filesList->DeleteAllItems();
        wxDELETE(m_watcher);
    }
}

void MyFrame::OnAdd(wxCommandEvent& WXUNUSED(event))
{
    AddEntry(wxFSWPath_Dir);
}

void MyFrame::OnAddTree(wxCommandEvent& WXUNUSED(event))
{
    AddEntry(wxFSWPath_Tree);
}

void MyFrame::AddEntry(wxFSWPathType type, wxString filename)
{
    if ( filename.empty() )
    {
        // TODO account for adding the files as well
        filename = wxDirSelector("Choose a folder to watch", "",
                                 wxDD_DEFAULT_STYLE | wxDD_DIR_MUST_EXIST);
        if ( filename.empty() )
            return;
    }

    wxCHECK_RET(m_watcher, "Watcher not initialized");

    wxLogDebug("Adding %s: '%s'",
               filename,
               type == wxFSWPath_Dir ? "directory" : "directory tree");

    bool ok = false;
    switch ( type )
    {
        case wxFSWPath_Dir:
            ok = m_watcher->Add(wxFileName::DirName(filename));
            break;

        case wxFSWPath_Tree:
            ok = m_watcher->AddTree(wxFileName::DirName(filename));
            break;

        case wxFSWPath_File:
        case wxFSWPath_None:
            wxFAIL_MSG( "Unexpected path type." );
    }

    if (!ok)
    {
        wxLogError("Error adding '%s' to watched paths", filename);
        return;
    }

    m_filesList->InsertItem(m_filesList->GetItemCount(), filename);
}

void MyFrame::OnRemove(wxCommandEvent& WXUNUSED(event))
{
    wxCHECK_RET(m_watcher, "Watcher not initialized");
    long idx = m_filesList->GetFirstSelected();
    if (idx == -1)
        return;

    wxString path = m_filesList->GetItemText(idx);

    // TODO we know it is a dir, but it doesn't have to be
    if (!m_watcher->Remove(wxFileName::DirName(path)))
    {
        wxLogError("Error removing '%s' from watched paths", path);
    }
    else
    {
        m_filesList->DeleteItem(idx);
    }
}

void MyFrame::OnFileSystemEvent(wxFileSystemWatcherEvent& event)
{
    // TODO remove when code is rock-solid
    wxLogTrace(wxTRACE_FSWATCHER, "*** %s ***", event.ToString());
    LogEvent(event);
}


static wxString GetFSWEventChangeTypeName(int changeType)
{
    switch (changeType)
    {
    case wxFSW_EVENT_CREATE:
        return "CREATE";
    case wxFSW_EVENT_DELETE:
        return "DELETE";
    case wxFSW_EVENT_RENAME:
        return "RENAME";
    case wxFSW_EVENT_MODIFY:
        return "MODIFY";
    case wxFSW_EVENT_ACCESS:
        return "ACCESS";
    }

    return "INVALID_TYPE";
}

void MyFrame::LogEvent(const wxFileSystemWatcherEvent& event)
{
    wxString entry = wxString::Format(LOG_FORMAT + "\n",
                            GetFSWEventChangeTypeName(event.GetChangeType()),
                            event.GetPath().GetFullPath(),
                            event.GetNewPath().GetFullPath());
    m_evtConsole->AppendText(entry);
}
Commit	Line	Data
6b8ef0b3 VZ	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: samples/fswatcher/fswatcher.cpp
	3	// Purpose: wxFileSystemWatcher sample
	4	// Author: Bartosz Bekier
	5	// Created: 2009-06-27
	6	// RCS-ID: $Id$
	7	// Copyright: (c) Bartosz Bekier
	8	// Licence: wxWindows licence
	9	/////////////////////////////////////////////////////////////////////////////
	10
	11	#include "wx/wxprec.h"
	12
	13	#ifdef __BORLANDC__
	14	#pragma hdrstop
	15	#endif
	16	#ifndef WX_PRECOMP
	17	#include "wx/wx.h"
	18	#endif
	19
	20	#ifndef __WXMSW__
	21	#include "../sample.xpm"
	22	#endif
	23
	24	#include "wx/fswatcher.h"
	25	#include "wx/listctrl.h"
5fc3e6d4	26	#include "wx/cmdline.h"
6b8ef0b3 VZ	27
	28	// Define a new frame type: this is going to be our main frame
	29	class MyFrame : public wxFrame
	30	{
	31	public:
	32	MyFrame(const wxString& title);
	33	virtual ~MyFrame();
	34
f8d37148 VZ	35	// Add an entry of the specified type asking the user for the filename if
	36	// the one passed to this function is empty.
	37	void AddEntry(wxFSWPathType type, wxString filename = wxString());
5fc3e6d4 VZ	38
	39	bool CreateWatcherIfNecessary();
	40
6b8ef0b3 VZ	41	private:
6b8ef0b3 VZ	42	// file system watcher creation
6b8ef0b3 VZ	43	void CreateWatcher();
	44
	45	// event handlers
	46	void OnClear(wxCommandEvent& WXUNUSED(event)) { m_evtConsole->Clear(); }
	47	void OnQuit(wxCommandEvent& WXUNUSED(event)) { Close(true); }
	48	void OnWatch(wxCommandEvent& event);
	49	void OnAbout(wxCommandEvent& event);
	50
	51	void OnAdd(wxCommandEvent& event);
f8d37148	52	void OnAddTree(wxCommandEvent& event);
6b8ef0b3 VZ	53	void OnRemove(wxCommandEvent& event);
	54
	55	void OnFileSystemEvent(wxFileSystemWatcherEvent& event);
	56	void LogEvent(const wxFileSystemWatcherEvent& event);
	57
	58	wxTextCtrl *m_evtConsole; // events console
	59	wxListView *m_filesList; // list of watched paths
	60	wxFileSystemWatcher* m_watcher; // file system watcher
	61
6b8ef0b3 VZ	62	const static wxString LOG_FORMAT; // how to format events
	63	};
	64
	65	const wxString MyFrame::LOG_FORMAT = " %-12s %-36s %-36s";
	66
	67	// Define a new application type, each program should derive a class from wxApp
	68	class MyApp : public wxApp
	69	{
	70	public:
	71	// 'Main program' equivalent: the program execution "starts" here
	72	virtual bool OnInit()
	73	{
5fc3e6d4 VZ	74	if ( !wxApp::OnInit() )
	75	return false;
	76
5cd99866	77	wxLog::AddTraceMask("EventSource");
6b8ef0b3 VZ	78	wxLog::AddTraceMask(wxTRACE_FSWATCHER);
	79
	80	// create the main application window
	81	m_frame = new MyFrame("File System Watcher wxWidgets App");
	82
	83	// If we returned false here, the application would exit immediately.
	84	return true;
	85	}
	86
	87	// create the file system watcher here, because it needs an active loop
	88	virtual void OnEventLoopEnter(wxEventLoopBase* WXUNUSED(loop))
	89	{
5fc3e6d4 VZ	90	if ( m_frame->CreateWatcherIfNecessary() )
	91	{
	92	if ( !m_dirToWatch.empty() )
f8d37148	93	m_frame->AddEntry(wxFSWPath_Dir, m_dirToWatch);
5fc3e6d4 VZ	94	}
	95	}
	96
	97	virtual void OnInitCmdLine(wxCmdLineParser& parser)
	98	{
	99	wxApp::OnInitCmdLine(parser);
	100	parser.AddParam("directory to watch",
	101	wxCMD_LINE_VAL_STRING,
	102	wxCMD_LINE_PARAM_OPTIONAL);
	103	}
	104
	105	virtual bool OnCmdLineParsed(wxCmdLineParser& parser)
	106	{
	107	if ( !wxApp::OnCmdLineParsed(parser) )
	108	return false;
	109
	110	if ( parser.GetParamCount() )
	111	m_dirToWatch = parser.GetParam();
	112
	113	return true;
6b8ef0b3 VZ	114	}
	115
	116	private:
	117	MyFrame *m_frame;
5fc3e6d4 VZ	118
	119	// The directory to watch if specified on the command line.
	120	wxString m_dirToWatch;
6b8ef0b3 VZ	121	};
	122
	123	// Create a new application object: this macro will allow wxWidgets to create
	124	// the application object during program execution (it's better than using a
	125	// static object for many reasons) and also declares the accessor function
	126	// wxGetApp() which will return the reference of the right type (i.e. MyApp and
	127	// not wxApp)
	128	IMPLEMENT_APP(MyApp)
	129
	130
	131	// ============================================================================
	132	// implementation
	133	// ============================================================================
	134
	135	// frame constructor
	136	MyFrame::MyFrame(const wxString& title)
	137	: wxFrame(NULL, wxID_ANY, title),
	138	m_watcher(NULL)
	139	{
	140	SetIcon(wxICON(sample));
	141
	142	// IDs for menu and buttons
	143	enum
	144	{
	145	MENU_ID_QUIT = wxID_EXIT,
	146	MENU_ID_CLEAR = wxID_CLEAR,
	147	MENU_ID_WATCH = 101,
	148
	149	BTN_ID_ADD = 200,
f8d37148 VZ	150	BTN_ID_ADD_TREE,
f8d37148 VZ	151	BTN_ID_REMOVE
6b8ef0b3 VZ	152	};
	153
	154	// ================================================================
	155	// menu
	156
	157	// create a menu bar
	158	wxMenu *menuFile = new wxMenu;
	159	menuFile->Append(MENU_ID_CLEAR, "&Clear log\tCtrl-L");
	160	menuFile->AppendSeparator();
	161	menuFile->Append(MENU_ID_QUIT, "E&xit\tAlt-X", "Quit this program");
	162
	163	// "Watch" menu
	164	wxMenu *menuMon = new wxMenu;
	165	wxMenuItem* it = menuMon->AppendCheckItem(MENU_ID_WATCH, "&Watch\tCtrl-W");
	166	// started by default, because file system watcher is started by default
	167	it->Check(true);
	168
	169	// the "About" item should be in the help menu
	170	wxMenu *menuHelp = new wxMenu;
2d143b66	171	menuHelp->Append(wxID_ABOUT, "&About\tF1", "Show about dialog");
6b8ef0b3 VZ	172
	173	// now append the freshly created menu to the menu bar...
	174	wxMenuBar *menuBar = new wxMenuBar();
	175	menuBar->Append(menuFile, "&File");
	176	menuBar->Append(menuMon, "&Watch");
	177	menuBar->Append(menuHelp, "&Help");
	178
	179	// ... and attach this menu bar to the frame
	180	SetMenuBar(menuBar);
	181
	182	// ================================================================
	183	// upper panel
	184
	185	// panel
	186	wxPanel *panel = new wxPanel(this);
	187	wxSizer *panelSizer = new wxGridSizer(2);
	188	wxBoxSizer *leftSizer = new wxBoxSizer(wxVERTICAL);
	189
	190	// label
	191	wxStaticText* label = new wxStaticText(panel, wxID_ANY, "Watched paths");
	192	leftSizer->Add(label, wxSizerFlags().Center().Border(wxALL));
	193
	194	// list of files
	195	m_filesList = new wxListView(panel, wxID_ANY, wxPoint(-1,-1),
	196	wxSize(300,200), wxLC_LIST \| wxLC_SINGLE_SEL);
	197	leftSizer->Add(m_filesList, wxSizerFlags(1).Expand());
	198
	199	// buttons
	200	wxButton* buttonAdd = new wxButton(panel, BTN_ID_ADD, "&Add");
f8d37148	201	wxButton* buttonAddTree = new wxButton(panel, BTN_ID_ADD_TREE, "Add &tree");
6b8ef0b3 VZ	202	wxButton* buttonRemove = new wxButton(panel, BTN_ID_REMOVE, "&Remove");
	203	wxSizer *btnSizer = new wxGridSizer(2);
	204	btnSizer->Add(buttonAdd, wxSizerFlags().Center().Border(wxALL));
f8d37148	205	btnSizer->Add(buttonAddTree, wxSizerFlags().Center().Border(wxALL));
6b8ef0b3 VZ	206	btnSizer->Add(buttonRemove, wxSizerFlags().Center().Border(wxALL));
	207
	208	// and put it all together
	209	leftSizer->Add(btnSizer, wxSizerFlags(0).Expand());
	210	panelSizer->Add(leftSizer, wxSizerFlags(1).Expand());
	211	panel->SetSizerAndFit(panelSizer);
	212
	213	// ================================================================
	214	// lower panel
	215
	216	wxTextCtrl *headerText = new wxTextCtrl(this, wxID_ANY, "",
	217	wxDefaultPosition, wxDefaultSize,
	218	wxTE_READONLY);
	219	wxString h = wxString::Format(LOG_FORMAT, "event", "path", "new path");
	220	headerText->SetValue(h);
	221
	222	// event console
	223	m_evtConsole = new wxTextCtrl(this, wxID_ANY, "",
	224	wxDefaultPosition, wxSize(200,200),
	225	wxTE_MULTILINE\|wxTE_READONLY\|wxHSCROLL);
	226
	227	// set monospace font to have output in nice columns
	228	wxFont font(9, wxFONTFAMILY_TELETYPE,
	229	wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
	230	headerText->SetFont(font);
	231	m_evtConsole->SetFont(font);
	232
	233	// ================================================================
	234	// laying out whole frame
	235
	236	wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
	237	sizer->Add(panel, wxSizerFlags(1).Expand());
	238	sizer->Add(headerText, wxSizerFlags().Expand());
	239	sizer->Add(m_evtConsole, wxSizerFlags(1).Expand());
	240	SetSizerAndFit(sizer);
	241
	242	// set size and position on screen
	243	SetSize(800, 600);
	244	CentreOnScreen();
	245
	246	// ================================================================
	247	// event handlers & show
	248
	249	// menu
	250	Connect(MENU_ID_CLEAR, wxEVT_COMMAND_MENU_SELECTED,
	251	wxCommandEventHandler(MyFrame::OnClear));
	252	Connect(MENU_ID_QUIT, wxEVT_COMMAND_MENU_SELECTED,
	253	wxCommandEventHandler(MyFrame::OnQuit));
	254	Connect(MENU_ID_WATCH, wxEVT_COMMAND_MENU_SELECTED,
	255	wxCommandEventHandler(MyFrame::OnWatch));
	256	Connect(wxID_ABOUT, wxEVT_COMMAND_MENU_SELECTED,
	257	wxCommandEventHandler(MyFrame::OnAbout));
	258
	259	// buttons
	260	Connect(BTN_ID_ADD, wxEVT_COMMAND_BUTTON_CLICKED,
	261	wxCommandEventHandler(MyFrame::OnAdd));
f8d37148 VZ	262	Connect(BTN_ID_ADD_TREE, wxEVT_COMMAND_BUTTON_CLICKED,
f8d37148 VZ	263	wxCommandEventHandler(MyFrame::OnAddTree));
6b8ef0b3 VZ	264	Connect(BTN_ID_REMOVE, wxEVT_COMMAND_BUTTON_CLICKED,
	265	wxCommandEventHandler(MyFrame::OnRemove));
	266
	267	// and show itself (the frames, unlike simple controls, are not shown when
	268	// created initially)
	269	Show(true);
	270	}
	271
	272	MyFrame::~MyFrame()
	273	{
	274	delete m_watcher;
	275	}
	276
5fc3e6d4	277	bool MyFrame::CreateWatcherIfNecessary()
6b8ef0b3 VZ	278	{
6b8ef0b3 VZ	279	if (m_watcher)
5fc3e6d4	280	return false;
6b8ef0b3 VZ	281
	282	CreateWatcher();
	283	Connect(wxEVT_FSWATCHER,
	284	wxFileSystemWatcherEventHandler(MyFrame::OnFileSystemEvent));
5fc3e6d4 VZ	285
5fc3e6d4 VZ	286	return true;
6b8ef0b3 VZ	287	}
	288
	289	void MyFrame::CreateWatcher()
	290	{
	291	wxCHECK_RET(!m_watcher, "Watcher already initialized");
	292	m_watcher = new wxFileSystemWatcher();
	293	m_watcher->SetOwner(this);
	294	}
	295
	296	// ============================================================================
	297	// event handlers
	298	// ============================================================================
	299
	300	void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
	301	{
	302	wxMessageBox("Demonstrates the usage of file system watcher, "
	303	"the wxWidgets monitoring system notifying you of "
	304	"changes done to your files.\n"
	305	"(c) 2009 Bartosz Bekier\n",
	306	"About wxWidgets File System Watcher Sample",
	307	wxOK \| wxICON_INFORMATION, this);
	308	}
	309
	310	void MyFrame::OnWatch(wxCommandEvent& event)
	311	{
	312	wxLogDebug("%s start=%d", __WXFUNCTION__, event.IsChecked());
	313
	314	if (event.IsChecked())
	315	{
	316	wxCHECK_RET(!m_watcher, "Watcher already initialized");
	317	CreateWatcher();
	318	}
	319	else
	320	{
	321	wxCHECK_RET(m_watcher, "Watcher not initialized");
	322	m_filesList->DeleteAllItems();
5276b0a5	323	wxDELETE(m_watcher);
6b8ef0b3 VZ	324	}
	325	}
	326
	327	void MyFrame::OnAdd(wxCommandEvent& WXUNUSED(event))
	328	{
f8d37148 VZ	329	AddEntry(wxFSWPath_Dir);
f8d37148 VZ	330	}
6b8ef0b3	331
f8d37148 VZ	332	void MyFrame::OnAddTree(wxCommandEvent& WXUNUSED(event))
	333	{
	334	AddEntry(wxFSWPath_Tree);
5fc3e6d4 VZ	335	}
5fc3e6d4 VZ	336
f8d37148	337	void MyFrame::AddEntry(wxFSWPathType type, wxString filename)
5fc3e6d4	338	{
f8d37148 VZ	339	if ( filename.empty() )
	340	{
	341	// TODO account for adding the files as well
	342	filename = wxDirSelector("Choose a folder to watch", "",
	343	wxDD_DEFAULT_STYLE \| wxDD_DIR_MUST_EXIST);
	344	if ( filename.empty() )
	345	return;
	346	}
	347
	348	wxCHECK_RET(m_watcher, "Watcher not initialized");
	349
	350	wxLogDebug("Adding %s: '%s'",
	351	filename,
	352	type == wxFSWPath_Dir ? "directory" : "directory tree");
6b8ef0b3	353
f8d37148 VZ	354	bool ok = false;
f8d37148 VZ	355	switch ( type )
6b8ef0b3	356	{
f8d37148 VZ	357	case wxFSWPath_Dir:
	358	ok = m_watcher->Add(wxFileName::DirName(filename));
	359	break;
	360
	361	case wxFSWPath_Tree:
	362	ok = m_watcher->AddTree(wxFileName::DirName(filename));
	363	break;
	364
	365	case wxFSWPath_File:
	366	case wxFSWPath_None:
	367	wxFAIL_MSG( "Unexpected path type." );
6b8ef0b3	368	}
f8d37148 VZ	369
f8d37148 VZ	370	if (!ok)
6b8ef0b3	371	{
f8d37148 VZ	372	wxLogError("Error adding '%s' to watched paths", filename);
f8d37148 VZ	373	return;
6b8ef0b3	374	}
f8d37148 VZ	375
f8d37148 VZ	376	m_filesList->InsertItem(m_filesList->GetItemCount(), filename);
6b8ef0b3 VZ	377	}
	378
	379	void MyFrame::OnRemove(wxCommandEvent& WXUNUSED(event))
	380	{
	381	wxCHECK_RET(m_watcher, "Watcher not initialized");
	382	long idx = m_filesList->GetFirstSelected();
	383	if (idx == -1)
	384	return;
	385
	386	wxString path = m_filesList->GetItemText(idx);
	387
	388	// TODO we know it is a dir, but it doesn't have to be
	389	if (!m_watcher->Remove(wxFileName::DirName(path)))
	390	{
	391	wxLogError("Error removing '%s' from watched paths", path);
	392	}
	393	else
	394	{
	395	m_filesList->DeleteItem(idx);
	396	}
	397	}
	398
	399	void MyFrame::OnFileSystemEvent(wxFileSystemWatcherEvent& event)
	400	{
	401	// TODO remove when code is rock-solid
6969b18c	402	wxLogTrace(wxTRACE_FSWATCHER, "* %s *", event.ToString());
6b8ef0b3 VZ	403	LogEvent(event);
	404	}
	405
	406
	407	static wxString GetFSWEventChangeTypeName(int changeType)
	408	{
	409	switch (changeType)
	410	{
	411	case wxFSW_EVENT_CREATE:
	412	return "CREATE";
	413	case wxFSW_EVENT_DELETE:
	414	return "DELETE";
	415	case wxFSW_EVENT_RENAME:
	416	return "RENAME";
	417	case wxFSW_EVENT_MODIFY:
	418	return "MODIFY";
	419	case wxFSW_EVENT_ACCESS:
	420	return "ACCESS";
	421	}
	422
	423	return "INVALID_TYPE";
	424	}
	425
	426	void MyFrame::LogEvent(const wxFileSystemWatcherEvent& event)
	427	{
	428	wxString entry = wxString::Format(LOG_FORMAT + "\n",
	429	GetFSWEventChangeTypeName(event.GetChangeType()),
	430	event.GetPath().GetFullPath(),
	431	event.GetNewPath().GetFullPath());
	432	m_evtConsole->AppendText(entry);
	433	}