cgit.sxemacs.org Git - harmattan/cameraplus/blob - qml/CameraPage.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 com.nokia.meego 1.1
  25 import QtCamera 1.0
  26 import CameraPlus 1.0
  27 import QtMobility.systeminfo 1.2
  28
  29 Page {
  30         id: page
  31
  32         property alias standbyWidget: standby
  33
  34         property bool needsPipeline: true
  35         property int policyMode: CameraResources.None
  36
  37         property Camera cam: null
  38         property bool controlsVisible: cam.running && !standby.visible
  39         property bool zoomVisible: true
  40         property bool modesVisible: true
  41         property bool standbyVisible: true
  42
  43         anchors.fill: parent
  44
  45         property alias previewAnimationRunning: preview.animationRunning
  46
  47         signal batteryLow
  48
  49         function updatePolicy() {
  50                 if (!resourcePolicy.acquire(page.policyMode)) {
  51                         cam.stop(true);
  52                 }
  53                 else {
  54                         handlePipeline();
  55                 }
  56         }
  57
  58         Component.onCompleted: {
  59                 if (Qt.application.active && needsPipeline) {
  60                         updatePolicy();
  61                 }
  62                 else if (!needsPipeline) {
  63                         cam.stop();
  64                 }
  65         }
  66
  67         onStatusChanged: {
  68                 if (Qt.application.active && status == PageStatus.Activating) {
  69                         updatePolicy();
  70                 }
  71         }
  72 /*
  73         onStatusChanged: {
  74                 if (status == PageStatus.Active && !page.needsPipeline) {
  75                         cam.stop();
  76                 }
  77         }
  78 */
  79
  80         onPolicyModeChanged: {
  81                 if (Qt.application.active) {
  82                         updatePolicy();
  83                 }
  84         }
  85
  86         function handlePipeline() {
  87                 var acquired = resourcePolicy.acquired;
  88                 var hijacked = resourcePolicy.hijacked;
  89
  90                 if (hijacked) {
  91                         cam.stop(true);
  92                         showError(qsTr("Resources lost. Stopping camera."));
  93                 }
  94                 else if (!Qt.application.active && !acquired) {
  95                         // I don't think this is needed
  96                         cam.stop(true);
  97                 }
  98                 else if (!Qt.application.active) {
  99                         cam.stop();
 100                 }
 101                 else if (acquired && page.needsPipeline && !cam.running) {
 102                         if (!cam.start()) {
 103                                 showError(qsTr("Failed to start camera. Please restart the application."));
 104                         }
 105                 }
 106         }
 107
 108         Connections {
 109                 target: resourcePolicy
 110                 onHijackedChanged: handlePipeline();
 111                 onAcquiredChanged: handlePipeline();
 112         }
 113
 114         Connections {
 115                 target: Qt.application
 116                 onActiveChanged: {
 117                         if (!Qt.application.active) {
 118                                 // This is a noop if camera is not
 119                                 // idle so calling it will not hurt
 120                                 if (cam.stop()) {
 121                                         resourcePolicy.acquire(CameraResources.None);
 122                                 }
 123                         }
 124                         else if (page.needsPipeline) {
 125                                 updatePolicy();
 126                         }
 127                 }
 128         }
 129
 130         Connections {
 131                 target: cam
 132                 onIdleChanged: {
 133                         if (cam.idle && !Qt.application.active) {
 134                                 cam.stop();
 135                                 resourcePolicy.acquire(CameraResources.None);
 136                         }
 137 /*
 138                         else if (cam.idle && !page.needsPipeline) {
 139                                 cam.stop();
 140                         }
 141 */
 142                 }
 143         }
 144
 145         Rectangle {
 146                 // TODO: fade out transition
 147                 // TODO: there is a toolbar visible on the first startup
 148                 id: standby
 149                 color: "black"
 150                 anchors.fill: parent
 151                 visible: standbyVisible && page.status == PageStatus.Active && (!Qt.application.active || !cam.running || !resourcePolicy.acquired)
 152                 Image {
 153                         source: "image://theme/icon-l-camera-standby"
 154                         anchors.centerIn: parent
 155                 }
 156         }
 157
 158         function setPreview(image) {
 159                 preview.setPreview(image);
 160         }
 161
 162         ModeButton {
 163                 anchors.bottom: parent.bottom
 164                 anchors.right: parent.right
 165                 anchors.rightMargin: 20
 166                 anchors.bottomMargin: 20
 167                 visible: controlsVisible && modesVisible
 168         }
 169
 170         PreviewImage {
 171                 id: preview
 172         }
 173
 174         ZoomSlider {
 175                 id: zoom
 176                 camera: cam
 177                 anchors.top: parent.top
 178                 anchors.topMargin: 0
 179                 anchors.horizontalCenter: parent.horizontalCenter
 180                 visible: controlsVisible && zoomVisible
 181         }
 182
 183         function checkDiskSpace() {
 184                 return fileSystem.hasFreeSpace(fileNaming.path);
 185         }
 186
 187         function checkBattery() {
 188                 // We are fine if we are connected to the charger:
 189                 if (batteryMonitor.chargingState == BatteryInfo.Charging) {
 190                         return true;
 191                 }
 192
 193                 // If we have enough battery then we are fine:
 194                 if (batteryMonitor.batteryStatus > BatteryInfo.BatteryCritical) {
 195                         return true;
 196                 }
 197
 198                 return false;
 199         }
 200
 201         BatteryInfo {
 202                 id: batteryMonitor
 203                 monitorChargingStateChanges: cam.running
 204                 monitorBatteryStatusChanges: cam.running
 205
 206                 onChargingStateChanged: {
 207                         if (!checkBattery()) {
 208                                 parent.batteryLow();
 209                         }
 210                 }
 211
 212                 onBatteryStatusChanged:  {
 213                         if (!checkBattery()) {
 214                                 parent.batteryLow();
 215                         }
 216                 }
 217         }
 218 }