diff -r d9aefe59d544 -r fa6d9f75d6a6 camerauis/cameraxui/cxengine/src/cxediskmonitorprivate.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camerauis/cameraxui/cxengine/src/cxediskmonitorprivate.cpp	Mon May 03 12:22:55 2010 +0300
@@ -0,0 +1,155 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+#include <QObject> // Compiler flags, keep first
+#ifdef Q_OS_SYMBIAN
+#include <coemain.h>
+#endif // Q_OS_SYMBIAN
+#include "cxutils.h"
+#include "cxesysutil.h"
+#include "cxesettings.h"
+#include "cxediskmonitor.h"
+#include "cxediskmonitorprivate.h"
+
+
+namespace
+{
+    const int MONITORING_INTERVAL = 2*1000; // in milliseconds
+    const int UNKNOWN = -1;
+}
+
+
+/*!
+* Constructor.
+*/
+CxeDiskMonitorPrivate::CxeDiskMonitorPrivate(CxeSettings &settings)
+    : mSettings(settings),
+      mTimer(),
+#ifdef Q_OS_SYMBIAN
+      mFs(CCoeEnv::Static()->FsSession()),
+      mCameraDrive(CxeSysUtil::getCameraDrive(mFs)),
+#endif // Q_OS_SYMBIAN
+      mTriggerLevelBytes(UNKNOWN),
+      mLatestFreeBytes(UNKNOWN)
+{
+    CX_DEBUG_ENTER_FUNCTION();
+    CX_DEBUG_EXIT_FUNCTION();
+}
+
+/*!
+* Destructor.
+*/
+CxeDiskMonitorPrivate::~CxeDiskMonitorPrivate()
+{
+    CX_DEBUG_ENTER_FUNCTION();
+    stop();
+    CX_DEBUG_EXIT_FUNCTION();
+}
+
+/*!
+* Slot for checking if the available disk space is below warning trigger level.
+*/
+void CxeDiskMonitorPrivate::checkSpace()
+{
+    CX_DEBUG_ENTER_FUNCTION();
+
+    qint64 previousFree(mLatestFreeBytes);
+
+    // Get the current free space.
+    mLatestFreeBytes = free(false);
+
+    // TESTING >>>
+    /*
+    static qint64 TEST = 20*1000*1000;
+    TEST /= 2;
+    mLatestFreeBytes = TEST;
+    */
+    // <<< TESTING
+
+    // If space has changed during monitoring, signal it now.
+    if (previousFree != mLatestFreeBytes && isMonitoring()) {
+        CX_DEBUG(("CxeDiskMonitorPrivate - Disk space changed %d -> %d bytes", previousFree, mLatestFreeBytes));
+        emit diskSpaceChanged();
+    }
+
+    // Only emit warning if trigger level is set to some positive value.
+    // Otherwise updating cached free space value is enough.
+    if (mTriggerLevelBytes != UNKNOWN && mLatestFreeBytes < mTriggerLevelBytes) {
+        CX_DEBUG(("[WARNING] CxeDiskMonitorPrivate - Disk space low!"));
+        emit diskSpaceLow();
+    }
+
+    CX_DEBUG_EXIT_FUNCTION();
+}
+
+/*!
+* Set the warning level of free disk space.
+* When free disk space falls below this limit, diskSpaceLow() signal is emitted.
+* @param bytes Limit in bytes.
+*/
+void CxeDiskMonitorPrivate::setLowWarningLevel(qint64 bytes)
+{
+    mTriggerLevelBytes = bytes;
+}
+
+/*!
+* Start monitoring disk space.
+*/
+void CxeDiskMonitorPrivate::start()
+{
+    if (!mTimer.isActive()) {
+        connect(&mTimer, SIGNAL(timeout()), this, SLOT(checkSpace()), Qt::UniqueConnection);
+        mTimer.start(MONITORING_INTERVAL);
+    }
+}
+
+/*!
+* Stop monitoring disk space.
+*/
+void CxeDiskMonitorPrivate::stop()
+{
+    mTimer.stop();
+    mLatestFreeBytes = UNKNOWN;
+}
+
+/*!
+* Is monitoring ongoing at the moment.
+*/
+bool CxeDiskMonitorPrivate::isMonitoring() const
+{
+    return mTimer.isActive();
+}
+
+/*!
+* Get free disk space for Camera use in bytes.
+* @param cached Can cached value be used.
+* If true (default value), value of last constant-interval-check is used (if it exists).
+* If false (or there's no cached value), forced reading of free space is done now.
+* This may cause significant delay compared to returning cached value.
+*/
+qint64 CxeDiskMonitorPrivate::free(bool cached) const
+{
+    qint64 value(0);
+    if (cached && mLatestFreeBytes != UNKNOWN) {
+        value = mLatestFreeBytes;
+    } else {
+        value = CxeSysUtil::spaceAvailable(mFs, mCameraDrive, mSettings);
+    }
+    return value;
+}
+
+// end of file