cgit.sxemacs.org Git - harmattan/cameraplus/blob - qml/PipelineManager.qml

   1 // -*- qml -*-
   2
   3 /*!
   4  * This file is part of CameraPlus.
   5  *
   6  * Copyright (C) 2012 Mohammed Sameer <msameer@foolab.org>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22
  23 import QtQuick 1.1
  24 import QtCamera 1.0
  25 import CameraPlus 1.0
  26
  27 Item {
  28         id: handler
  29
  30         property bool showStandBy: state != "on"
  31
  32         property alias acquired: policy.acquired
  33         property alias hijacked: policy.hijacked
  34         property alias scaleAcquired: policy.scaleAcquired
  35
  36         property Camera camera: null
  37         property Item currentPage: pageStack.currentPage
  38         property bool error: false
  39
  40         onCurrentPageChanged: {
  41                 if (state == "on" || state == "policyLost") {
  42                         startCamera();
  43                 }
  44         }
  45
  46         CameraResources {
  47                 id: policy
  48         }
  49
  50         function startCamera() {
  51                 if (error) {
  52                         return;
  53                 }
  54
  55                 if (!policy.acquire(currentPage.policyMode)) {
  56                         console.log("Failed to acquire policy resources");
  57                         return;
  58                 }
  59
  60                 if (!camera.start()) {
  61                         showError(qsTr("Failed to start camera. Please restart the application."));
  62                 }
  63         }
  64
  65         function stopCamera() {
  66                 if (camera.stop(false)) {
  67                         policy.acquire(CameraResources.None);
  68                         error = false;
  69                 }
  70         }
  71
  72         function forceStopCamera() {
  73                 // We don't release resources here so we can get them back
  74                 // when they become available
  75                 pageStack.currentPage.policyLost();
  76                 camera.stop(true);
  77                 error = false;
  78         }
  79
  80         state: "off"
  81
  82 //        onStateChanged: console.log("New state " + handler.state);
  83
  84         states: [
  85         State {
  86                 name: "on"
  87                 when: Qt.application.active && currentPage && currentPage.policyMode != CameraResources.None && !policy.hijacked
  88         },
  89         State {
  90                 name: "off"
  91                 when: (!Qt.application.active && camera.idle) || (currentPage && currentPage.policyMode == CameraResources.None && camera.idle)
  92         },
  93         State {
  94                 name: "policyLost"
  95                 when: policy.hijacked
  96         },
  97         State {
  98                 name: "error"
  99         }
 100         ]
 101
 102         transitions: [
 103         Transition {
 104                 to: "off"
 105                 ScriptAction {
 106                         script: stopCamera();
 107                 }
 108         },
 109         Transition {
 110                 from: "off"
 111                 to: "on"
 112                 ScriptAction {
 113                         script: handler.startCamera();
 114                 }
 115         },
 116
 117         Transition {
 118                 from: "on"
 119                 to: "policyLost"
 120                 ScriptAction {
 121                         script: forceStopCamera();
 122                 }
 123         },
 124
 125         Transition {
 126                 from: "policyLost"
 127                 to: "off"
 128                 ScriptAction {
 129                         script: stopCamera();
 130                 }
 131         },
 132         Transition {
 133                 from: "policyLost"
 134                 to: "on"
 135                 ScriptAction {
 136                         script: startCamera();
 137                 }
 138         }
 139         ]
 140 }