author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 03 May 2010 12:23:15 +0300 | |
changeset 20 | ecc8def7944a |
parent 18 | 578830873419 |
child 23 | 2dc6caa42ec3 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "nmuiengineheaders.h" |
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#include <QTimer> |
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/*! |
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\brief Constructor |
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Constructor of NmOperation |
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\param parent Parent object. |
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*/ |
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NmOperation::NmOperation(QObject *parent) |
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: QObject(parent), |
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mProgress(0), |
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mIsRunning(true) |
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{ |
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// operation is started immediately |
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mTimer = new QTimer(this); // QObject takes care of deleting |
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mTimer->setSingleShot(true); |
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connect(mTimer, SIGNAL(timeout()), this, SLOT(runAsyncOperation())); |
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mTimer->start(1); |
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} |
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/*! |
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\brief Destructor |
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*/ |
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NmOperation::~NmOperation() |
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{ |
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// Delete items from the mPreliminaryOperations list. |
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qDeleteAll(mPreliminaryOperations.begin(), mPreliminaryOperations.end()); |
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// Remove the items. |
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mPreliminaryOperations.clear(); |
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} |
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/*! |
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\brief Tells whether the operation is running or not |
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*/ |
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bool NmOperation::isRunning() const |
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{ |
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return mIsRunning; |
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} |
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/*! |
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\brief Adds a "preliminary operation" which needs to end until this operation can start. |
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Ownership of the operation is transferred to this. |
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*/ |
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void NmOperation::addPreliminaryOperation(NmOperation *operation) |
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{ |
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connect(operation, SIGNAL(operationCompleted()), this, |
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SLOT(handlePreliminaryOperationFinished())); |
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connect(operation, SIGNAL(operationCancelled()), this, |
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SLOT(handlePreliminaryOperationFinished())); |
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mPreliminaryOperations.append(operation); |
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} |
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|
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/*! |
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\brief Slot, complete |
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The performer of the asynchronous function call should use this slot when |
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the operation is completed, this will emit the actionCompleted signal * |
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\param result Result from operation |
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*/ |
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void NmOperation::completeOperation(int result) |
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{ |
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// Operation is completed, emit the signal |
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doCompleteOperation(); |
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emit this->operationCompleted(result); |
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mIsRunning = false; |
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} |
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/*! |
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\brief Slot, cancel |
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The observer of the asynchronous function call should use this slot if it |
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wants to cancel the ongoing operation, it will emit the actionCancelled signal |
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*/ |
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void NmOperation::cancelOperation() |
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{ |
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// Operation is canceled, emit the signal |
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mTimer->stop(); |
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this->doCancelOperation(); |
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emit this->operationCancelled(); |
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mIsRunning = false; |
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} |
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/*! |
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\brief Slot, update progress |
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The performer of the asynchronous function call should use this slot when |
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updating the operation progress, this will emit the progressChanged signal |
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*/ |
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void NmOperation::updateOperationProgress(int progress) |
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{ |
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mProgress = progress; |
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this->doUpdateOperationProgress(); |
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emit this->operationProgressChanged(mProgress); |
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} |
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/*! |
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\brief Slot, run the operation if no preliminary operations are running. |
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Calls the pure virtual doRunAsyncOperation() of the derived class if there are no preliminary |
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operations running. |
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*/ |
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void NmOperation::runAsyncOperation() |
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{ |
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// cleanup the preliminary operations |
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int count = mPreliminaryOperations.count(); |
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for (int i = 0; i < count; ++i) { |
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if (!mPreliminaryOperations[i] || !mPreliminaryOperations[i]->isRunning()) { |
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delete mPreliminaryOperations.takeAt(i); |
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--i; |
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--count; |
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} |
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} |
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|
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if (mPreliminaryOperations.count() == 0) { |
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doRunAsyncOperation(); |
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} |
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} |
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|
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/*! |
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\brief Slot, update progress |
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This is signalled by a preliminary operation when its operation is completed or cancelled. |
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Do not call runAsyncOperation immediately but let the signal be handled by other slots first. |
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*/ |
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void NmOperation::handlePreliminaryOperationFinished() |
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{ |
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mTimer->stop(); |
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mTimer->start(1); |
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} |
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|
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/*! |
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\brief Virtual function to be implemented by subclasses |
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This function is called from the completeAction before the signal is |
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emitted. Derived class can override this is some special actions |
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are needed. |
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*/ |
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void NmOperation::doCompleteOperation() |
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{ |
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|
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} |
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|
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/*! |
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\brief Virtual function to be implemented by subclasses |
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This function is called from the cancelAction after the trigger timer |
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and before the signal is emitted. Derived class can override this |
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and put its own cancellation operations here. |
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*/ |
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void NmOperation::doCancelOperation() |
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{ |
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} |
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|
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/*! |
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\brief Virtual function to be implemented by subclasses |
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This function is called from the updateProgress after the progress |
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value has been updated and before the signal is emitted. Derived class |
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can override this. |
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*/ |
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void NmOperation::doUpdateOperationProgress() |
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{ |
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} |
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|
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176 |