samples/power/power.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        power.cpp
   3 // Purpose:     wxWidgets power management sample
   4 // Author:      Vadim Zeitlin
   5 // Created:     2006-05-27
   6 // RCS-ID:      $Id$
   7 // Copyright:   (C) 2006 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22     #pragma hdrstop
  23 #endif
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/app.h"
  27     #include "wx/frame.h"
  28     #include "wx/log.h"
  29 #endif
  30
  31 #include "wx/textctrl.h"
  32 #include "wx/msgdlg.h"
  33
  34 #include "wx/power.h"
  35
  36 #ifndef wxHAS_IMAGES_IN_RESOURCES
  37     #include "../sample.xpm"
  38 #endif
  39
  40 // ----------------------------------------------------------------------------
  41 // main frame class
  42 // ----------------------------------------------------------------------------
  43
  44 class MyFrame : public wxFrame
  45 {
  46 public:
  47     MyFrame()
  48         : wxFrame(NULL, wxID_ANY, wxT("wxWidgets Power Management Sample"),
  49                   wxDefaultPosition, wxSize(500, 200))
  50     {
  51         wxTextCtrl *text = new wxTextCtrl(this, wxID_ANY, wxT(""),
  52                                           wxDefaultPosition, wxDefaultSize,
  53                                           wxTE_MULTILINE | wxTE_READONLY);
  54         m_logOld = wxLog::SetActiveTarget(new wxLogTextCtrl(text));
  55
  56         CreateStatusBar();
  57
  58         SetIcon(wxICON(sample));
  59
  60         UpdatePowerSettings(wxPOWER_UNKNOWN, wxBATTERY_UNKNOWN_STATE);
  61
  62         Show();
  63     }
  64
  65     virtual ~MyFrame()
  66     {
  67         delete wxLog::SetActiveTarget(m_logOld);
  68     }
  69
  70 private:
  71     void OnIdle(wxIdleEvent& WXUNUSED(event))
  72     {
  73         const wxPowerType powerType = wxGetPowerType();
  74         const wxBatteryState batteryState = wxGetBatteryState();
  75         if ( powerType != m_powerType || batteryState != m_batteryState )
  76         {
  77             UpdatePowerSettings(powerType, batteryState);
  78         }
  79     }
  80
  81 #ifdef wxHAS_POWER_EVENTS
  82     void OnSuspending(wxPowerEvent& event)
  83     {
  84         wxLogMessage(wxT("System suspend starting..."));
  85         if ( wxMessageBox(wxT("Veto suspend?"), wxT("Please answer"),
  86                           wxYES_NO, this) == wxYES )
  87         {
  88             event.Veto();
  89             wxLogMessage(wxT("Vetoed suspend."));
  90         }
  91     }
  92
  93     void OnSuspended(wxPowerEvent& WXUNUSED(event))
  94     {
  95         wxLogMessage(wxT("System is going to suspend."));
  96     }
  97
  98     void OnSuspendCancel(wxPowerEvent& WXUNUSED(event))
  99     {
 100         wxLogMessage(wxT("System suspend was cancelled."));
 101     }
 102
 103     void OnResume(wxPowerEvent& WXUNUSED(event))
 104     {
 105         wxLogMessage(wxT("System resumed from suspend."));
 106     }
 107 #endif // wxHAS_POWER_EVENTS
 108
 109
 110     void UpdatePowerSettings(wxPowerType powerType, wxBatteryState batteryState)
 111     {
 112         wxString powerStr;
 113         switch ( m_powerType = powerType )
 114         {
 115             case wxPOWER_SOCKET:
 116                 powerStr = wxT("wall");
 117                 break;
 118
 119             case wxPOWER_BATTERY:
 120                 powerStr = wxT("battery");
 121                 break;
 122
 123             default:
 124                 wxFAIL_MSG(wxT("unknown wxPowerType value"));
 125                 // fall through
 126
 127             case wxPOWER_UNKNOWN:
 128                 powerStr = wxT("psychic");
 129                 break;
 130         }
 131
 132         wxString batteryStr;
 133         switch ( m_batteryState = batteryState )
 134         {
 135             case wxBATTERY_NORMAL_STATE:
 136                 batteryStr = wxT("charged");
 137                 break;
 138
 139             case wxBATTERY_LOW_STATE:
 140                 batteryStr = wxT("low");
 141                 break;
 142
 143             case wxBATTERY_CRITICAL_STATE:
 144                 batteryStr = wxT("critical");
 145                 break;
 146
 147             case wxBATTERY_SHUTDOWN_STATE:
 148                 batteryStr = wxT("empty");
 149                 break;
 150
 151             default:
 152                 wxFAIL_MSG(wxT("unknown wxBatteryState value"));
 153                 // fall through
 154
 155             case wxBATTERY_UNKNOWN_STATE:
 156                 batteryStr = wxT("unknown");
 157                 break;
 158         }
 159
 160         SetStatusText(wxString::Format(
 161                         wxT("System is on %s power, battery state is %s"),
 162                         powerStr.c_str(),
 163                         batteryStr.c_str()));
 164     }
 165
 166     wxPowerType m_powerType;
 167     wxBatteryState m_batteryState;
 168
 169     wxLog *m_logOld;
 170
 171     DECLARE_EVENT_TABLE()
 172 };
 173
 174 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 175     EVT_IDLE(MyFrame::OnIdle)
 176
 177 #ifdef wxHAS_POWER_EVENTS
 178     EVT_POWER_SUSPENDING(MyFrame::OnSuspending)
 179     EVT_POWER_SUSPENDED(MyFrame::OnSuspended)
 180     EVT_POWER_SUSPEND_CANCEL(MyFrame::OnSuspendCancel)
 181     EVT_POWER_RESUME(MyFrame::OnResume)
 182 #endif // wxHAS_POWER_EVENTS
 183 END_EVENT_TABLE()
 184
 185 // ----------------------------------------------------------------------------
 186 // main application class
 187 // ----------------------------------------------------------------------------
 188
 189 class MyApp : public wxApp
 190 {
 191 public:
 192     virtual bool OnInit()
 193     {
 194         new MyFrame;
 195
 196         return true;
 197     }
 198 };
 199
 200 IMPLEMENT_APP(MyApp)