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439 lines
16 KiB
439 lines
16 KiB
/*
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progressmanager.h
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This file is part of TDEPIM.
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Author: Till Adam <adam@kde.org> (C) 2004
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef __KPIM_PROGRESSMANAGER_H__
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#define __KPIM_PROGRESSMANAGER_H__
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#include <tqobject.h>
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#include <tqdict.h>
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#include <tqstring.h>
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#include <kdemacros.h>
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namespace KPIM {
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class ProgressItem;
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class ProgressManager;
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typedef TQMap<ProgressItem*, bool> ProgressItemMap;
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class KDE_EXPORT ProgressItem : public TQObject
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{
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Q_OBJECT
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friend class ProgressManager;
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friend class TQDict< ProgressItem >; // so it can be deleted from dicts
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public:
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/**
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* @return The id string which uniquely identifies the operation
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* represented by this item.
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*/
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const TQString& id() const { return mId; }
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/**
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* @return The parent item of this one, if there is one.
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*/
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ProgressItem *parent() const { return mParent; }
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/**
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* @return The user visible string to be used to represent this item.
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*/
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const TQString& label() const { return mLabel; }
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/**
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* @param v Set the user visible string identifying this item. @p v will
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be interpreted as rich text, so it might have to be escaped.
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*/
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void setLabel( const TQString& v );
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/**
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* @return The string to be used for showing this item's current status.
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*/
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const TQString& status() const { return mStatus; }
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/**
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* Set the string to be used for showing this item's current status.
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* @p v will be interpreted as rich text, so it might have to be escaped.
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* @param v The status string.
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*/
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void setStatus( const TQString& v );
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/**
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* @return Whether this item can be cancelled.
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*/
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bool canBeCanceled() const { return mCanBeCanceled; }
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/**
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* @return Whether this item uses secure communication
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* (Account uses ssl, for example.).
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*/
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bool usesCrypto() const { return mUsesCrypto; }
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/**
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* Set whether this item uses crypted communication, so listeners
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* can display a nice crypto icon.
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* @param v The value.
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*/
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void setUsesCrypto( bool v );
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/**
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* @return whether this item uses a busy indicator instead of real progress display
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*/
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bool usesBusyIndicator() const { return mUsesBusyIndicator; }
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/**
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* Sets whether this item uses a busy indicator instead of real progress for its progress bar.
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* If it uses a busy indicator, you are still responsible for calling setProgress() from time to
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* time to update the busy indicator.
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*/
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void setUsesBusyIndicator( bool useBusyIndicator );
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/**
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* @return The current progress value of this item in percent.
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*/
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unsigned int progress() const { return mProgress; }
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/**
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* Set the progress (percentage of completion) value of this item.
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* @param v The percentage value.
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*/
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void setProgress( unsigned int v );
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/**
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* Tell the item it has finished. This will emit progressItemCompleted()
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* result in the destruction of the item after all slots connected to this
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* signal have executed. This is the only way to get rid of an item and
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* needs to be called even if the item is cancelled. Don't use the item
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* after this has been called on it.
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*/
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void setComplete();
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/**
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* Reset the progress value of this item to 0 and the status string to
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* the empty string.
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*/
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void reset() { setProgress( 0 ); setStatus( TQString() ); mCompleted = 0; }
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void cancel();
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// Often needed values for calculating progress.
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void setTotalItems( unsigned int v ) { mTotal = v; }
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unsigned int totalItems() const { return mTotal; }
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void setCompletedItems( unsigned int v ) { mCompleted = v; }
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void incCompletedItems( unsigned int v = 1 ) { mCompleted += v; }
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unsigned int completedItems() const { return mCompleted; }
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/**
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* Recalculate progress according to total/completed items and update.
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*/
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void updateProgress() { setProgress( mTotal? mCompleted*100/mTotal: 0 ); }
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void addChild( ProgressItem *kiddo );
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void removeChild( ProgressItem *kiddo );
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bool canceled() const { return mCanceled; }
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signals:
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/**
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* Emitted when a new ProgressItem is added.
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* @param The ProgressItem that was added.
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*/
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void progressItemAdded( KPIM::ProgressItem* );
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/**
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* Emitted when the progress value of an item changes.
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* @param The item which got a new value.
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* @param The value, for convenience.
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*/
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void progressItemProgress( KPIM::ProgressItem*, unsigned int );
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/**
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* Emitted when a progress item was completed. The item will be
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* deleted afterwards, so slots connected to this are the last
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* chance to work with this item.
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* @param The completed item.
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*/
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void progressItemCompleted( KPIM::ProgressItem* );
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/**
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* Emitted when an item was cancelled. It will _not_ go away immediately,
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* only when the owner sets it complete, which will usually happen. Can be
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* used to visually indicate the cancelled status of an item. Should be used
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* by the owner of the item to make sure it is set completed even if it is
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* cancelled. There is a ProgressManager::slotStandardCancelHandler which
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* simply sets the item completed and can be used if no other work needs to
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* be done on cancel.
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* @param The canceled item;
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*/
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void progressItemCanceled( KPIM::ProgressItem* );
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/**
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* Emitted when the status message of an item changed. Should be used by
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* progress dialogs to update the status message for an item.
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* @param The updated item.
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* @param The new message.
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*/
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void progressItemStatus( KPIM::ProgressItem*, const TQString& );
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/**
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* Emitted when the label of an item changed. Should be used by
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* progress dialogs to update the label of an item.
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* @param The updated item.
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* @param The new label.
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*/
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void progressItemLabel( KPIM::ProgressItem*, const TQString& );
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/**
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* Emitted when the crypto status of an item changed. Should be used by
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* progress dialogs to update the crypto indicator of an item.
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* @param The updated item.
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* @param The new state.
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*/
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void progressItemUsesCrypto( KPIM::ProgressItem*, bool );
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/**
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* Emitted when the busy indicator state of an item changes. Should be used
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* by progress dialogs so that they can adjust the display of the progress bar
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* to the new mode.
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* @param item The updated item
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* @param value True if the item uses a busy indicator now, false otherwise
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*/
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void progressItemUsesBusyIndicator( KPIM::ProgressItem *item, bool value );
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protected:
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/* Only to be used by our good friend the ProgressManager */
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ProgressItem( ProgressItem* parent,
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const TQString& id,
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const TQString& label,
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const TQString& status,
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bool isCancellable,
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bool usesCrypto );
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virtual ~ProgressItem();
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private:
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TQString mId;
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TQString mLabel;
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TQString mStatus;
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ProgressItem* mParent;
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bool mCanBeCanceled;
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unsigned int mProgress;
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ProgressItemMap mChildren;
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unsigned int mTotal;
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unsigned int mCompleted;
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bool mWaitingForKids;
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bool mCanceled;
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bool mUsesCrypto;
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bool mUsesBusyIndicator;
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};
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/**
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* The ProgressManager singleton keeps track of all ongoing transactions
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* and notifies observers (progress dialogs) when their progress percent value
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* changes, when they are completed (by their owner), and when they are canceled.
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* Each ProgressItem emits those signals individually and the singleton
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* broadcasts them. Use the ::createProgressItem() statics to acquire an item
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* and then call ->setProgress( int percent ) on it everytime you want to update
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* the item and ->setComplete() when the operation is done. This will delete the
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* item. Connect to the item's progressItemCanceled() signal to be notified when
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* the user cancels the transaction using one of the observing progress dialogs
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* or by calling item->cancel() in some other way. The owner is responsible for
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* calling setComplete() on the item, even if it is canceled. Use the
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* standardCancelHandler() slot if that is all you want to do on cancel.
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*
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* Note that if you request an item with a certain id and there is already
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* one with that id, there will not be a new one created but the existing
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* one will be returned. This is convenient for accessing items that are
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* needed regularly without the to store a pointer to them or to add child
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* items to parents by id.
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*/
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class KDE_EXPORT ProgressManager : public TQObject
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{
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Q_OBJECT
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public:
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virtual ~ProgressManager();
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/**
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* @return The singleton instance of this class.
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*/
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static ProgressManager * instance();
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/**
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* Use this to acquire a unique id number which can be used to discern
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* an operation from all others going on at the same time. Use that
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* number as the id string for your progressItem to ensure it is unique.
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* @return
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*/
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static TQString getUniqueID() { return TQString::number( ++uID ); }
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/**
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* Creates a ProgressItem with a unique id and the given label.
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* This is the simplest way to acquire a progress item. It will not
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* have a parent and will be set to be cancellable and not using crypto.
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*
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* @param label The text to be displayed by progress handlers. It will be
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* interpreted as rich text, so it might have to be escaped.
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*/
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static ProgressItem * createProgressItem( const TQString &label ) {
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return instance()->createProgressItemImpl( 0, getUniqueID(), label,
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TQString(), true, false );
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}
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/**
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* Creates a new progressItem with the given parent, id, label and initial
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* status.
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*
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* @param parent Specify an already existing item as the parent of this one.
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* @param id Used to identify this operation for cancel and progress info.
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* @param label The text to be displayed by progress handlers. It will be
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* interpreted as rich text, so it might have to be escaped.
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* @param status Additional text to be displayed for the item. It will be
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* interpreted as rich text, so it might have to be escaped.
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* @param canBeCanceled can the user cancel this operation?
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* @param usesCrypto does the operation use secure transports (SSL)
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* Cancelling the parent will cancel the children as well (if they can be
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* cancelled) and ongoing children prevent parents from finishing.
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* @return The ProgressItem representing the operation.
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*/
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static ProgressItem * createProgressItem( ProgressItem* parent,
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const TQString& id,
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const TQString& label,
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const TQString& status = TQString(),
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bool canBeCanceled = true,
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bool usesCrypto = false ) {
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return instance()->createProgressItemImpl( parent, id, label, status,
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canBeCanceled, usesCrypto );
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}
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/**
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* Use this version if you have the id string of the parent and want to
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* add a subjob to it.
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*/
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static ProgressItem * createProgressItem( const TQString& parent,
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const TQString& id,
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const TQString& label,
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const TQString& status = TQString(),
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bool canBeCanceled = true,
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bool usesCrypto = false ) {
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return instance()->createProgressItemImpl( parent, id, label,
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status, canBeCanceled, usesCrypto );
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}
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/**
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* Version without a parent.
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*/
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static ProgressItem * createProgressItem( const TQString& id,
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const TQString& label,
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const TQString& status = TQString(),
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bool canBeCanceled = true,
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bool usesCrypto = false ) {
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return instance()->createProgressItemImpl( 0, id, label, status,
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canBeCanceled, usesCrypto );
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}
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/**
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* @return true when there is no more progress item
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*/
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bool isEmpty() const { return mTransactions.isEmpty(); }
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/**
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* @return the only top level progressitem when there's only one.
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* Returns 0 if there is no item, or more than one top level item.
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* Since this is used to calculate the overall progress, it will also return
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* 0 if there is an item which uses a busy indicator, since that will invalidate
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* the overall progress.
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*/
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ProgressItem* singleItem() const;
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/**
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* Ask all listeners to show the progress dialog, because there is
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* something that wants to be shown.
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*/
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static void emitShowProgressDialog() {
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instance()->emitShowProgressDialogImpl();
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}
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signals:
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/** @see ProgressItem::progressItemAdded() */
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void progressItemAdded( KPIM::ProgressItem* );
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/** @see ProgressItem::progressItemProgress() */
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void progressItemProgress( KPIM::ProgressItem*, unsigned int );
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/** @see ProgressItem::progressItemCompleted() */
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void progressItemCompleted( KPIM::ProgressItem* );
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/** @see ProgressItem::progressItemCanceled() */
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void progressItemCanceled( KPIM::ProgressItem* );
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/** @see ProgressItem::progressItemStatus() */
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void progressItemStatus( KPIM::ProgressItem*, const TQString& );
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/** @see ProgressItem::progressItemLabel() */
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void progressItemLabel( KPIM::ProgressItem*, const TQString& );
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/** @see ProgressItem::progressItemUsesCrypto() */
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void progressItemUsesCrypto( KPIM::ProgressItem*, bool );
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/** @see ProgressItem::progressItemUsesBusyIndicator */
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void progressItemUsesBusyIndicator( KPIM::ProgressItem*, bool );
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/**
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* Emitted when an operation requests the listeners to be shown.
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* Use emitShowProgressDialog() to trigger it.
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*/
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void showProgressDialog();
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public slots:
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/**
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* Calls setCompleted() on the item, to make sure it goes away.
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* Provided for convenience.
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* @param item the canceled item.
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*/
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void slotStandardCancelHandler( KPIM::ProgressItem* item );
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/**
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* Aborts all running jobs. Bound to "Esc"
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*/
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void slotAbortAll();
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private slots:
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void slotTransactionCompleted( KPIM::ProgressItem *item );
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private:
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ProgressManager();
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// prevent unsolicited copies
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ProgressManager( const ProgressManager& );
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virtual ProgressItem* createProgressItemImpl(
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ProgressItem* parent, const TQString& id,
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const TQString& label, const TQString& status,
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bool cancellable, bool usesCrypto );
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virtual ProgressItem* createProgressItemImpl(
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const TQString& parent, const TQString& id,
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const TQString& label, const TQString& status,
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bool cancellable, bool usesCrypto );
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void emitShowProgressDialogImpl();
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TQDict< ProgressItem > mTransactions;
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static ProgressManager *mInstance;
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static unsigned int uID;
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};
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}
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#endif // __KPIM_PROGRESSMANAGER_H__
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