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280 lines
10 KiB
280 lines
10 KiB
/*
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* This file is part of the KDE libraries
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* Copyright (C) 2003 Benjamin C Meyer (ben+tdelibs at meyerhome dot net)
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*
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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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*
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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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*
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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 KAUTOCONFIG_H
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#define KAUTOCONFIG_H
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#include <tqobject.h>
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#include <tqptrlist.h>
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#include "kopete_export.h"
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class TDEConfig;
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class TQWidget;
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/**
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* @short Provides a means of automatically retrieving, saving and resetting basic settings
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*
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* The KAutoConfig class provides a means of automatically retrieving,
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* saving and resetting basic settings. It also can emit signals when
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* settings have been changed (settings were saved) or modified (the
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* user changes a checkbox from on to off).
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*
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* When told to retrieve settings ( retrieveSettings()) KAutoConfig
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* will traverse the specified widgets building a list of all known widgets
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* that have a name and havn't been marked to be ignored.
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* If a setting is marked immutable the value is loaded and the widget is
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* disabled.
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*
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* The name of the widget determines the name of the setting. The initial
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* value of the widget also is the default value when the widget is reset.
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* If the widget does not have a name then it is ignored.
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*
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* When saveSettings() or resetSettings() is called KAutoConfig
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* goes through the list of known widgets and performs the operation on each
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* of them.
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*
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* If one of the widgets needs special treatment it can be specified to be
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* ignored using the ignoreSubWidget() function.
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*
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* KAutoConfig uses the TQSqlPropertyMap class to determine if it can do
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* anything to a widget. Note that KAutoConfig doesn't require a database,
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* it simply uses the functionality that is built into the TQSqlPropertyMap
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* class. New widgets can be added to the map using
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* TQSqlPropertyMap::installDefaultMap(). Note that you can't just add any
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* class. The class must have a matching TQ_PROPERTY(...) macro defined.
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*
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* For example (note that KColorButton is already added and it doesn't need to
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* manually added):
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*
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* kcolorbutton.h defines the following property:
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* \code
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* TQ_PROPERTY( TQColor color READ color WRITE setColor )
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* \endcode
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*
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* To add KColorButton the following code would be inserted in the main.
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*
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* \code
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* TQSqlPropertyMap *map = TQSqlPropertyMap::defaultMap();
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* map.insert("KColorButton", "color");
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* TQSqlPropertyMap::installDefaultMap(map);
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* \endcode
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*
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* If you add a new widget to the TQSqlPropertyMap and wish to be notified when
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* it is modified you should add its signal using addWidgetChangedSignal().
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* If the Apply and Default buttons and enabled/disabled by KAutoConfigDialog
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* automatically then this must be done.
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*
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* @see KAutoConfigDialog
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* @since 3.2
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* @author Benjamin C Meyer <ben+tdelibs at meyerhome dot net>
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*/
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class KOPETE_EXPORT KAutoConfig : public TQObject {
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TQ_OBJECT
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signals:
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/**
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* One or more of the settings have been saved (such as when the user
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* clicks on the Apply button). This is only emitted by saveSettings()
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* whenever one or more setting were changed and consequently saved.
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*/
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void settingsChanged();
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/**
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* One or more of the settings have been changed.
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* @param widget - The widget group (pass in via addWidget()) that
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* contains the one or more modified setting.
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* @see settingsChanged()
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*/
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void settingsChanged( TQWidget *widget );
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/**
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* If retrieveSettings() was told to track changes then if
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* any known setting was changed this signal will be emitted. Note
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* that a settings can be modified several times and might go back to the
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* original saved state. hasChanged() will tell you if anything has
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* actually changed from the saved values.
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*/
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void widgetModified();
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public:
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/**
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* Constructor.
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* @param tdeconfig - TDEConfig to use when retrieving/saving the widgets
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* that KAutoConfig knows about.
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* @param parent - Parent object.
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* @param name - Object name.
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*/
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KAutoConfig( TDEConfig *tdeconfig, TQObject *parent=0, const char *name=0 );
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/**
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* Constructor.
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* Uses TDEGlobal::config() when retrieving/saving the widgets that
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* KAutoConfig knows about.
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* @param parent - Parent object.
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* @param name - Object name.
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*/
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KAutoConfig( TQObject *parent=0, const char *name=0 );
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/**
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* Destructor. Deletes private class.
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*/
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~KAutoConfig();
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/**
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* Adds a widget to the list of widgets that should be parsed for any
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* children that KAutoConfig might know when retrieveSettings() is
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* called. All calls to this function should be made before calling
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* retrieveSettings().
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* @param widget - Pointer to the widget to add.
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* @param group - Name of the group from which all of the settings for this
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* widget will be located. If a child of 'widget' needs to be in a separate
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* group it should be added separately and also ignored.
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* @see ignoreSubWidget()
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*/
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void addWidget( TQWidget *widget, const TQString &group );
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/**
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* Ignore the specified child widget when performing an action. Doesn't
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* effect widgets that were added with addWidget() only their children. All
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* calls to this function should be made before calling retrieveSettings().
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* @param widget - Pointer to the widget that should be ignored.
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* Note: Widgets that don't have a name are ignored automatically.
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**/
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void ignoreSubWidget( TQWidget *widget );
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/**
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* Traverse the specified widgets to see if anything is different then the
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* current settings. retrieveSettings() must be called before this
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* function to build the list of known widgets and default values.
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* @return bool - True if any settings are different then the stored values.
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*/
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bool hasChanged() const;
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/**
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* Traverse the specified widgets to see if anything is different then the
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* default. retrieveSettings() must be called before this function to
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* build the list of known widgets and default values.
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* @return bool - True if all of the settings are their default values.
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*/
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bool isDefault() const;
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/**
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* Adds a widget and its signal to the internal list so that when
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* KAutoConfig finds widgetName in retrieveSettings() it will know
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* how to connect its signal that it has changed to KAutoConfig's signal
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* widgetModified(). This function should be called before
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*
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* Example:
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* \code
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* addWidgetChangedSignal( "TQCheckbox", TQ_SIGNAL(stateChanged(int)) );
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* \endcode
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*
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* This is generally used in conjunction with the addition of a class
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* to TQSqlPropertyMap so KAutoConfig can get/set its values.
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*
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* @param widgetName - The class name of the widget (className()).
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* @param signal - The signal (with "TQ_SIGNAL()" wrapper) that should be called.
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*/
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inline void addWidgetChangedSignal( const TQString &widgetName,
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const TQCString &signal ){
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changedMap.insert( widgetName, signal );
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}
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/**
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* Traverse the specified widgets, retrieving the settings for all known
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* widgets that aren't being ignored and storing the default values.
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* @param trackChanges - If any changes by the widgets should be tracked
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* set true. This causes the emitting the modified() signal when
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* something changes.
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* @return bool - True if any setting was changed from the default.
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*/
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bool retrieveSettings( bool trackChanges=false );
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public slots:
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/**
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* Traverse the specified widgets, saving the settings for all known
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* widgets that aren't being ignored. retrieveSettings() must be called
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* before this function to build the list of known widgets and default values.
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* @return bool - True if any settings were changed.
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*
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* Example use: User clicks Ok or Apply button in a configure dialog.
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*/
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bool saveSettings();
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/**
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* Traverse the specified widgets, reseting the widgets to their default
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* values for all known widgets that aren't being ignored.
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* retrieveSettings() must be called before this function to build
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* the list of known widgets and default values.
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*
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* Example use: User clicks Default button in a configure dialog.
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*/
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void resetSettings() const;
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/**
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* Traverse the specified widgets, reloading the settings for all known
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* widgets that aren't being ignored.
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* retrieveSettings() must be called before this function to build
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* the list of known widgets and default values.
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*
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* Example use: User clicks Reset button in a configure dialog.
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*/
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void reloadSettings() const;
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protected:
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/**
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* TDEConfigBase object used to get/save values.
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*/
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TDEConfig *config;
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/**
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* Map of the classes and the signals that they emit when changed.
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*/
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TQMap<TQString, TQCString> changedMap;
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/**
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* Recursive function that finds all known children.
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* Goes through the children of widget and if any are known and not being
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* ignored, stores them in currentGroup. Also checks if the widget
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* should be disabled because it is set immutable.
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* @param widget - Parent of the children to look at.
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* @param currentGroup - Place to store known children of widget.
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* @param trackChanges - If true then tracks any changes to the children of
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* widget that are known.
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* @return bool - If a widget was set to something other then its default.
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* @see retrieveSettings()
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*/
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bool parseChildren( const TQWidget *widget,
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TQPtrList<TQWidget>¤tGroup, bool trackChanges );
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private:
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class KAutoConfigPrivate;
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/**
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* KAutoConfig Private class.
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*/
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KAutoConfigPrivate *d;
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};
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#endif // KAUTOCONFIG_H
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