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annotate src/power/uikit/SDL_syspower.m @ 5127:b6c7a6b07ebf

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Updated main.c for API changes Kees Bakker to sdl The main.c for the template is still targeting SDL1.2. Here is the patch to make it work for SDL1.3 (I'm hoping the mailing lists accepts attachments.) In this patch I have also changed the shell script that assembles the Template. Since there is now only one lib target (same name for "device" and "simulator" version) I copy the simulator library to the destination with the name libSDLSimulator.a. This is not a satisfactory solution, because both libraries are included in the project while only one is needed (depending on the selected environment). However, I'm not fluent with Xcode to say what a better solution would be. Kind regards, Kees Bakker
author Sam Lantinga <slouken@libsdl.org>
date Fri, 28 Jan 2011 10:37:36 -0800
parents 42e1092225f9
children b530ef003506
rev   line source
4444
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifndef SDL_POWER_DISABLED
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25 #ifdef SDL_POWER_UIKIT
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26
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27 #import <UIKit/UIKit.h>
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28
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29 #include "SDL_power.h"
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30 #include "SDL_timer.h"
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31 #include "SDL_assert.h"
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32
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33 // turn off the battery monitor if it's been more than X ms since last check.
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34 static const int BATTERY_MONITORING_TIMEOUT = 3000;
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35 static Uint32 SDL_UIKitLastPowerInfoQuery = 0;
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36
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37 void
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38 SDL_UIKit_UpdateBatteryMonitoring(void)
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39 {
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40 if (SDL_UIKitLastPowerInfoQuery) {
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41 const Uint32 prev = SDL_UIKitLastPowerInfoQuery;
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42 const UInt32 now = SDL_GetTicks();
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43 const UInt32 ticks = now - prev;
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44 // if timer wrapped (now < prev), shut down, too.
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45 if ((now < prev) || (ticks >= BATTERY_MONITORING_TIMEOUT)) {
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46 UIDevice *uidev = [UIDevice currentDevice];
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47 SDL_assert([uidev isBatteryMonitoringEnabled] == YES);
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48 [uidev setBatteryMonitoringEnabled:NO];
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49 SDL_UIKitLastPowerInfoQuery = 0;
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50 }
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51 }
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52 }
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53
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54 SDL_bool
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55 SDL_GetPowerInfo_UIKit(SDL_PowerState * state, int *seconds, int *percent)
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56 {
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57 UIDevice *uidev = [UIDevice currentDevice];
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58
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59 if (!SDL_UIKitLastPowerInfoQuery) {
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60 SDL_assert([uidev isBatteryMonitoringEnabled] == NO);
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61 [uidev setBatteryMonitoringEnabled:YES];
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62 }
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63
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64 // UIKit_GL_SwapWindow() (etc) will check this and disable the battery
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65 // monitoring if the app hasn't queried it in the last X seconds.
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66 // Apparently monitoring the battery burns battery life. :)
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67 // Apple's docs say not to monitor the battery unless you need it.
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68 SDL_UIKitLastPowerInfoQuery = SDL_GetTicks();
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69
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70 *seconds = -1; // no API to estimate this in UIKit.
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71
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72 switch ([uidev batteryState])
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73 {
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74 case UIDeviceBatteryStateCharging:
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75 *state = SDL_POWERSTATE_CHARGING;
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76 break;
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77
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78 case UIDeviceBatteryStateFull:
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79 *state = SDL_POWERSTATE_CHARGED;
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80 break;
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81
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82 case UIDeviceBatteryStateUnplugged:
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83 *state = SDL_POWERSTATE_ON_BATTERY;
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84 break;
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85
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86 case UIDeviceBatteryStateUnknown:
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87 default:
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88 *state = SDL_POWERSTATE_UNKNOWN;
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89 break;
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90 }
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91
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92 const float level = [uidev batteryLevel];
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93 *percent = ( (level < 0.0f) ? -1 : (((int) (level + 0.5f)) * 100) );
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94 return SDL_TRUE; /* always the definitive answer on iPhoneOS. */
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95 }
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96
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97 #endif /* SDL_POWER_UIKIT */
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98 #endif /* SDL_POWER_DISABLED */
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99
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100 /* vi: set ts=4 sw=4 expandtab: */