summaryrefslogtreecommitdiffstats
path: root/tdeui/kcmodule.h
blob: 268c3800ae4a741f74c05c7eef60608f933b91c1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/*
   This file is part of the KDE libraries

   Copyright (c) 1999 Matthias Hoelzer-Kluepfel <hoelzer@kde.org>

   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., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.

*/

#ifndef KCMODULE_H
#define KCMODULE_H

#include <tqwidget.h>

#include <kdelibs_export.h>

class TQStringList;

class KAboutData;
class KConfigDialogManager;
class KConfigSkeleton;
class KCModulePrivate;
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:
 *
 * \code
 * #include <kgenericfactory.h>
 *
 * typedef KGenericFactory<YourKCModule, TQWidget> YourKCModuleFactory;
 * K_EXPORT_COMPONENT_FACTORY( yourLibName, YourKCModuleFactory("name_of_the_po_file") );
 * \endcode
 *
 * The parameter "name_of_the_po_file" has to correspond with the messages target
 * that you created in your Makefile.am.
 *
 * See http://developer.kde.org/documentation/other/kcm_howto.html
 * for more detailed documentation.
 *
 * @author Matthias Hoelzer-Kluepfel <hoelzer@kde.org>
 */
class KDEUI_EXPORT KCModule : public TQWidget
{
  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 TQStringList argument in your
   * implementation.
   */
  KCModule(TQWidget *parent=0, const char *name=0, const TQStringList &args=TQStringList() );

  KCModule(KInstance *instance, TQWidget *parent=0, const TQStringList &args=TQStringList() );

  /*
   * 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. 
   *
   * If you use KConfigXT, loading is taken care of automatically and 
   * you do not need to do it manually. However, if you for some reason reimplement it and
   * also are using KConfigXT, you must call this function otherwise the loading of KConfigXT 
   * options will not work.
   *
   */
  virtual void load();
  // ### KDE 4: Call load() automatically through a single-shot timer
  //            from the constructor // and change documentation

  /**
   * 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. This normally does not apply for
   * KSettings::Dialog modules where the updating is taken care of by
   * KSettings::Dispatcher.
   *
   * save is called when the user clicks "Apply" or "Ok".
   *
   * If you use KConfigXT, saving is taken care off automatically and 
   * you do not need to load manually. However, if you for some reason reimplement it and
   * also are using KConfigXT, you must call this function, otherwise the saving of KConfigXT 
   * options will not work. Call it at the very end of your reimplementation, to avoid
   * changed() signals getting emitted when you modify widgets.
   */
  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.
   *
   * If you use KConfigXT, you do not have to reimplement this function since
   * the fetching and settings of default values is done automatically. However, if you 
   * reimplement and also are using KConfigXT, remember to call the base function at the 
   * very end of your reimplementation.
   */
  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 behavior is to call defaults().
   */
  virtual void sysdefaults() { defaults(); }
  // KDE 4 deprecate

  /**
   * 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 formatting tags in the text.
   *
   * @note make sure the quick help text gets translated (use i18n()).
   */
  virtual TQString quickHelp() const;

  /**
   * This is generally only called for the KBugReport.
   * If you override you should  have it return a pointer to a constant.
   *
   *
   * @returns the KAboutData for this module
   */
  virtual const KAboutData *aboutData() const;
  
  /**
   * This sets the KAboutData returned by aboutData()
   * @since 3.3
   */
   void setAboutData( KAboutData* about );

  /**
   * 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
   */
  TQString 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;

  KInstance *instance() const;

  /**
   * @return a list of @ref KConfigDialogManager's in use, if any.
   * @since 3.4
   */
  const TQPtrList<KConfigDialogManager>& configs() const;

protected:
  /**
   * Adds a KConfigskeleton @p config to watch the widget @p widget
   *
   * This function is useful if you need to handle multiple configuration files.
   *
   * @since 3.3
   * @return a pointer to the KConfigDialogManager in use
   * @param config the KConfigSkeleton to use
   * @param widget the widget to watch
   */
  KConfigDialogManager* addConfig( KConfigSkeleton *config, TQWidget* widget );

  /**
   * Sets the quick help.
   *
   * @since 3.3
   */
  void setQuickHelp( const TQString& help );

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 slots:

  /**
   * Calling this slot is equivalent to emitting changed(true).
   * @since 3.3
   */
  void changed();

  /**
   * A managed widget was changed, the widget settings and the current
   * settings are compared and a corresponding changed() signal is emitted
   * @since 3.4
   */
   void widgetChanged();

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::rootOnlyMsg
   */
  void setRootOnlyMsg(const TQString& msg);

  /**
   * Change whether 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);

  /**
   * Returns the changed state of automatically managed widgets in this dialog
   * @since 3.5
   */
  bool managedWidgetChangeState() const;

  /**
   * Call this method when your manually managed widgets change state between
   * changed and not changed
   * @since 3.5
   */
  void unmanagedWidgetChangeState(bool);

private:

  int _btn;
protected:
  virtual void virtual_hook( int id, void* data );
private:
  KCModulePrivate *d;

  /**
   * Internal function for initialization of the class.
   */
  void init();

};

#endif //KCMODULE_H