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wxWidgets/samples/keyboard/keyboard.cpp
Vadim Zeitlin c4f49d69cf Make keyboard sample output less confusing. 
Warn if key presses occur when the input window doesn't have focus as the
usual key events are not generated then which could be understood as a bug in
the sample instead of the correct result.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72253 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2012-07-29 22:08:21 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: keyboard.cpp
// Purpose: Keyboard wxWidgets sample
// Author: Vadim Zeitlin
// Modified by: Marcin Wojdyr
// Created: 07.04.02
// RCS-ID: $Id$
// Copyright: (c) 2002 Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#ifndef wxHAS_IMAGES_IN_RESOURCES
#include "../sample.xpm"
#endif
// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
public:
MyFrame(const wxString& title);
private:
// event handlers
void OnQuit(wxCommandEvent& WXUNUSED(event)) { Close(true); }
void OnAbout(wxCommandEvent& event);
void OnTestAccelA(wxCommandEvent& WXUNUSED(event))
{ m_logText->AppendText("Test accelerator \"A\" used.\n"); }
void OnTestAccelCtrlA(wxCommandEvent& WXUNUSED(event))
{ m_logText->AppendText("Test accelerator \"Ctrl-A\" used.\n"); }
void OnTestAccelEsc(wxCommandEvent& WXUNUSED(event))
{ m_logText->AppendText("Test accelerator \"Esc\" used.\n"); }
void OnClear(wxCommandEvent& WXUNUSED(event)) { m_logText->Clear(); }
void OnSkipDown(wxCommandEvent& event) { m_skipDown = event.IsChecked(); }
void OnSkipHook(wxCommandEvent& event) { m_skipHook = event.IsChecked(); }
void OnKeyDown(wxKeyEvent& event)
{
LogEvent("KeyDown", event);
if ( m_skipDown )
event.Skip();
}
void OnKeyUp(wxKeyEvent& event) { LogEvent("KeyUp", event); }
void OnChar(wxKeyEvent& event) { LogEvent("Char", event); }
void OnCharHook(wxKeyEvent& event)
{
// The logged messages can be confusing if the input window doesn't
// have focus so warn about this.
if ( !m_inputWin->HasFocus() )
{
m_logText->SetDefaultStyle(*wxRED);
m_logText->AppendText("WARNING: focus is not on input window, "
"non-hook events won't be logged.\n");
m_logText->SetDefaultStyle(wxTextAttr());
}
LogEvent("Hook", event);
if ( m_skipHook )
event.Skip();
}
void OnPaintInputWin(wxPaintEvent& event);
void LogEvent(const wxString& name, wxKeyEvent& event);
wxTextCtrl *m_logText;
wxWindow *m_inputWin;
bool m_skipHook,
m_skipDown;
};
// 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()
{
// create the main application window
new MyFrame("Keyboard wxWidgets App");
// If we returned false here, the application would exit immediately.
return true;
}
};
// 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_inputWin(NULL),
m_skipHook(true),
m_skipDown(true)
{
SetIcon(wxICON(sample));
// IDs for menu items
enum
{
QuitID = wxID_EXIT,
ClearID = wxID_CLEAR,
SkipHook = 100,
SkipDown,
TestAccelA,
TestAccelCtrlA,
TestAccelEsc
};
// create a menu bar
wxMenu *menuFile = new wxMenu;
menuFile->Append(ClearID, "&Clear log\tCtrl-L");
menuFile->AppendSeparator();
menuFile->Append(TestAccelA, "Test accelerator &1\tA");
menuFile->Append(TestAccelCtrlA, "Test accelerator &2\tCtrl-A");
menuFile->Append(TestAccelEsc, "Test accelerator &3\tEsc");
menuFile->AppendSeparator();
menuFile->AppendCheckItem(SkipHook, "Skip CHAR_HOOK event",
"Not skipping this event disables both KEY_DOWN and CHAR events"
);
menuFile->Check(SkipHook, true);
menuFile->AppendCheckItem(SkipDown, "Skip KEY_DOWN event",
"Not skipping this event disables CHAR event generation"
);
menuFile->Check(SkipDown, true);
menuFile->AppendSeparator();
menuFile->Append(QuitID, "E&xit\tAlt-X", "Quit this program");
// 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(menuHelp, "&Help");
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
m_inputWin = new wxWindow(this, wxID_ANY, wxDefaultPosition, wxSize(-1, 50),
wxRAISED_BORDER);
m_inputWin->SetBackgroundColour(*wxBLUE);
wxTextCtrl *headerText = new wxTextCtrl(this, wxID_ANY, "",
wxDefaultPosition, wxDefaultSize,
wxTE_READONLY);
headerText->SetValue(
" event key KeyCode mod UnicodeKey "
" RawKeyCode RawKeyFlags Position");
m_logText = new wxTextCtrl(this, wxID_ANY, "",
wxDefaultPosition, wxDefaultSize,
wxTE_MULTILINE|wxTE_READONLY|wxTE_RICH|wxHSCROLL);
// set monospace font to have output in nice columns
wxFont font(10, wxFONTFAMILY_TELETYPE,
wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL);
headerText->SetFont(font);
m_logText->SetFont(font);
// layout
wxBoxSizer *sizer = new wxBoxSizer(wxVERTICAL);
sizer->Add(m_inputWin, wxSizerFlags().Expand());
sizer->Add(headerText, wxSizerFlags().Expand());
sizer->Add(m_logText, wxSizerFlags(1).Expand());
SetSizerAndFit(sizer);
// set size and position on screen
SetSize(700, 340);
CentreOnScreen();
// connect menu event handlers
Connect(QuitID, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnQuit));
Connect(wxID_ABOUT, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnAbout));
Connect(ClearID, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnClear));
Connect(SkipHook, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnSkipHook));
Connect(SkipDown, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnSkipDown));
Connect(TestAccelA, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnTestAccelA));
Connect(TestAccelCtrlA, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnTestAccelCtrlA));
Connect(TestAccelEsc, wxEVT_COMMAND_MENU_SELECTED,
wxCommandEventHandler(MyFrame::OnTestAccelEsc));
// connect event handlers for the blue input window
m_inputWin->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(MyFrame::OnKeyDown),
NULL, this);
m_inputWin->Connect(wxEVT_KEY_UP, wxKeyEventHandler(MyFrame::OnKeyUp),
NULL, this);
m_inputWin->Connect(wxEVT_CHAR, wxKeyEventHandler(MyFrame::OnChar),
NULL, this);
m_inputWin->Connect(wxEVT_PAINT,
wxPaintEventHandler(MyFrame::OnPaintInputWin),
NULL, this);
// notice that we don't connect OnCharHook() to the input window, unlike
// the usual key events this one is propagated upwards
Connect(wxEVT_CHAR_HOOK, wxKeyEventHandler(MyFrame::OnCharHook));
// status bar is useful for showing the menu items help strings
CreateStatusBar();
// and show itself (the frames, unlike simple controls, are not shown when
// created initially)
Show(true);
}
// event handlers
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxMessageBox("Demonstrates keyboard event processing in wxWidgets\n"
"(c) 2002 Vadim Zeitlin\n"
"(c) 2008 Marcin Wojdyr",
"About wxWidgets Keyboard Sample",
wxOK | wxICON_INFORMATION, this);
}
void MyFrame::OnPaintInputWin(wxPaintEvent& WXUNUSED(event))
{
wxPaintDC dc(m_inputWin);
dc.SetTextForeground(*wxWHITE);
wxFont font(*wxSWISS_FONT);
font.SetWeight(wxFONTWEIGHT_BOLD);
font.SetPointSize(font.GetPointSize() + 2);
dc.SetFont(font);
dc.DrawLabel("Press keys here",
m_inputWin->GetClientRect(), wxALIGN_CENTER);
}
// helper function that returns textual description of wx virtual keycode
const char* GetVirtualKeyCodeName(int keycode)
{
switch ( keycode )
{
#define WXK_(x) \
case WXK_##x: return #x;
WXK_(BACK)
WXK_(TAB)
WXK_(RETURN)
WXK_(ESCAPE)
WXK_(SPACE)
WXK_(DELETE)
WXK_(START)
WXK_(LBUTTON)
WXK_(RBUTTON)
WXK_(CANCEL)
WXK_(MBUTTON)
WXK_(CLEAR)
WXK_(SHIFT)
WXK_(ALT)
WXK_(CONTROL)
WXK_(MENU)
WXK_(PAUSE)
WXK_(CAPITAL)
WXK_(END)
WXK_(HOME)
WXK_(LEFT)
WXK_(UP)
WXK_(RIGHT)
WXK_(DOWN)
WXK_(SELECT)
WXK_(PRINT)
WXK_(EXECUTE)
WXK_(SNAPSHOT)
WXK_(INSERT)
WXK_(HELP)
WXK_(NUMPAD0)
WXK_(NUMPAD1)
WXK_(NUMPAD2)
WXK_(NUMPAD3)
WXK_(NUMPAD4)
WXK_(NUMPAD5)
WXK_(NUMPAD6)
WXK_(NUMPAD7)
WXK_(NUMPAD8)
WXK_(NUMPAD9)
WXK_(MULTIPLY)
WXK_(ADD)
WXK_(SEPARATOR)
WXK_(SUBTRACT)
WXK_(DECIMAL)
WXK_(DIVIDE)
WXK_(F1)
WXK_(F2)
WXK_(F3)
WXK_(F4)
WXK_(F5)
WXK_(F6)
WXK_(F7)
WXK_(F8)
WXK_(F9)
WXK_(F10)
WXK_(F11)
WXK_(F12)
WXK_(F13)
WXK_(F14)
WXK_(F15)
WXK_(F16)
WXK_(F17)
WXK_(F18)
WXK_(F19)
WXK_(F20)
WXK_(F21)
WXK_(F22)
WXK_(F23)
WXK_(F24)
WXK_(NUMLOCK)
WXK_(SCROLL)
WXK_(PAGEUP)
WXK_(PAGEDOWN)
WXK_(NUMPAD_SPACE)
WXK_(NUMPAD_TAB)
WXK_(NUMPAD_ENTER)
WXK_(NUMPAD_F1)
WXK_(NUMPAD_F2)
WXK_(NUMPAD_F3)
WXK_(NUMPAD_F4)
WXK_(NUMPAD_HOME)
WXK_(NUMPAD_LEFT)
WXK_(NUMPAD_UP)
WXK_(NUMPAD_RIGHT)
WXK_(NUMPAD_DOWN)
WXK_(NUMPAD_PAGEUP)
WXK_(NUMPAD_PAGEDOWN)
WXK_(NUMPAD_END)
WXK_(NUMPAD_BEGIN)
WXK_(NUMPAD_INSERT)
WXK_(NUMPAD_DELETE)
WXK_(NUMPAD_EQUAL)
WXK_(NUMPAD_MULTIPLY)
WXK_(NUMPAD_ADD)
WXK_(NUMPAD_SEPARATOR)
WXK_(NUMPAD_SUBTRACT)
WXK_(NUMPAD_DECIMAL)
WXK_(NUMPAD_DIVIDE)
WXK_(WINDOWS_LEFT)
WXK_(WINDOWS_RIGHT)
#ifdef __WXOSX__
WXK_(RAW_CONTROL)
#endif
#undef WXK_
default:
return NULL;
}
}
// helper function that returns textual description of key in the event
wxString GetKeyName(const wxKeyEvent &event)
{
int keycode = event.GetKeyCode();
const char* virt = GetVirtualKeyCodeName(keycode);
if ( virt )
return virt;
if ( keycode > 0 && keycode < 32 )
return wxString::Format("Ctrl-%c", (unsigned char)('A' + keycode - 1));
if ( keycode >= 32 && keycode < 128 )
return wxString::Format("'%c'", (unsigned char)keycode);
#if wxUSE_UNICODE
int uc = event.GetUnicodeKey();
if ( uc != WXK_NONE )
return wxString::Format("'%c'", uc);
#endif
return "unknown";
}
void MyFrame::LogEvent(const wxString& name, wxKeyEvent& event)
{
wxString msg;
// event key_name KeyCode modifiers Unicode raw_code raw_flags pos
msg.Printf("%7s %15s %5d %c%c%c%c"
#if wxUSE_UNICODE
"%5d (U+%04x)"
#else
" none "
#endif
#ifdef wxHAS_RAW_KEY_CODES
" %7lu 0x%08lx"
#else
" not-set not-set"
#endif
" (%5d,%5d)"
"\n",
name,
GetKeyName(event),
event.GetKeyCode(),
event.ControlDown() ? 'C' : '-',
event.AltDown() ? 'A' : '-',
event.ShiftDown() ? 'S' : '-',
event.MetaDown() ? 'M' : '-'
#if wxUSE_UNICODE
, event.GetUnicodeKey()
, event.GetUnicodeKey()
#endif
#ifdef wxHAS_RAW_KEY_CODES
, (unsigned long) event.GetRawKeyCode()
, (unsigned long) event.GetRawKeyFlags()
#endif
, event.GetX()
, event.GetY()
);
m_logText->AppendText(msg);
}
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