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