/* This file is part of the KDE libraries Copyright (c) 1999 Matthias Hoelzer-Kluepfel This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef __KCMODULE_H__ #define __KCMODULE_H__ #include #include //USclass KAboutData; class KCModulePrivate; //US class KInstance; /** * The base class for control center modules. * * Starting from KDE 2.0, control center modules are realized as shared * libraries that are loaded into the control center at runtime. * * The module in principle is a simple widget displaying the * item to be changed. The module has a very small interface. * * All the necessary glue logic and the GUI bells and whistles * are provided by the control center and must not concern * the module author. * * To write a config module, you have to create a library * that contains at one factory function like this: * * 
 * #include 
 *
 * typedef KGenericFactory YourKCModuleFactory;
 * K_EXPORT_COMPONENT_FACTORY( yourLibName, YourKCModuleFactory("name_of_the_po_file") );
 *
* * The parameter "name_of_the_po_file" has to correspond with the messages target * that you created in your Makefile.am. * * See kdebase/kcontrol/HOWTO for more detailed documentation. * * @author Matthias Hoelzer-Kluepfel */ class KCModule : public QWidget { Q_OBJECT public: /** * An enumeration type for the buttons used by this module. * You should only use Help, Default and Apply. The rest is obsolete. * * @see KCModule::buttons @see KCModule::setButtons */ enum Button {Help=1, Default=2, Apply=16, Reset=4, /* obsolete, do not use! */ Cancel=8, /* obsolete, do not use! */ Ok=32, /* obsolete, do not use! */ SysDefault=64 /* obsolete, do not use! */ }; /* * Base class for all KControlModules. * Make sure you have a QStringList argument in your * implementation. */ KCModule(QWidget *parent=0, const char *name=0, const QStringList &args=QStringList() ); //US KCModule(KInstance *instance, QWidget *parent=0, const QStringList &args=QStringList() ); /* * Destroys the module. */ ~KCModule(); /** * Load the configuration data into the module. * * The load method sets the user interface elements of the * module to reflect the current settings stored in the * configuration files. * * This method is invoked whenever the module should read its configuration * (most of the times from a config file) and update the user interface. * This happens when the user clicks the "Reset" button in the control * center, to undo all of his changes and restore the currently valid * settings. NOTE that this is not called after the modules is loaded, * so you probably want to call this method in the constructor. */ virtual void load() {}; /** * Save the configuration data. * * The save method stores the config information as shown * in the user interface in the config files. * * If necessary, this method also updates the running system, * e.g. by restarting applications. * * save is called when the user clicks "Apply" or "Ok". */ virtual void save() {}; /** * Sets the configuration to sensible default values. * * This method is called when the user clicks the "Default" * button. It should set the display to useful values. */ virtual void defaults() {}; /** * Set the configuration to system default values. * * This method is called when the user clicks the "System-Default" * button. It should set the display to the system default values. * * NOTE: The default behaviour is to call defaults(). */ virtual void sysdefaults() { defaults(); }; /** * Return a quick-help text. * * This method is called when the module is docked. * The quick-help text should contain a short description of the module and * links to the module's help files. You can use QML formating tags in the text. * * NOTE: Please make sure the quick help text gets translated (use i18n()). */ virtual QString quickHelp() const { return QString::null; }; /** * Returns a the KAboutData for this module * This is generally only called for the KBugReport. * Override and have it return a pointer to a constant */ //US virtual const KAboutData *aboutData() const { return 0; } /** * Indicate which buttons will be used. * * The return value is a value or'ed together from * the Button enumeration type. * * @see KCModule::setButtons */ int buttons() const { return _btn; }; /** * Get the RootOnly message for this module. * * When the module must be run as root, or acts differently * for root and a normal user, it is sometimes useful to * customize the message that appears at the top of the module * when used as a normal user. This function returns this * customized message. If none has been set, a default message * will be used. * * @see KCModule::setRootOnlyMsg */ QString rootOnlyMsg() const; /** * Tell if KControl should show a RootOnly message when run as * a normal user. * * In some cases, the module don't want a RootOnly message to * appear (for example if it has already one). This function * tells KControl if a RootOnly message should be shown * * @see KCModule::setUseRootOnlyMsg */ bool useRootOnlyMsg() const; //US KInstance *instance() const; signals: /** * Indicate that the state of the modules contents has changed. * * This signal is emitted whenever the state of the configuration * shown in the module changes. It allows the control center to * keep track of unsaved changes. * */ void changed(bool state); /** * Indicate that the module's quickhelp has changed. * * Emit this signal whenever the module's quickhelp changes. * Modules implemented as tabbed dialogs might want to implement * per-tab quickhelp for example. * */ void quickHelpChanged(); protected: /** * Sets the buttons to display. * * Help: shows a "Help" button. * Default: shows a "Use Defaults" button * Apply: in kcontrol this will show an "Apply" and "Reset" button * in kcmshell this will show an "Ok", "Apply" and "Cancel" button * * If Apply is not specified, kcmshell will show a "Close" button. * * @see KCModule::buttons */ void setButtons(int btn) { _btn = btn; }; /** * Sets the RootOnly message. * * This message will be shown at the top of the module of the * corresponding desktop file contains the line X-KDE-RootOnly=true. * If no message is set, a default one will be used. * * @see KCModule::rootOnlyMessage */ void setRootOnlyMsg(const QString& msg); /** * Change wether or not the RootOnly message should be shown. * * Following the value of @p on, the RootOnly message will be * shown or not. * * @see KCModule::useRootOnlyMsg */ void setUseRootOnlyMsg(bool on); private: int _btn; protected: virtual void virtual_hook( int id, void* data ); private: KCModulePrivate *d; }; #endif