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