summaryrefslogtreecommitdiffstats
path: root/tdeutils/tdecmoduleproxy.h
blob: 1aa337a23e65231d48125eff0f23bb49dca04a1e (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
362
363
364
365
366
367
/*  This file is part of the KDE project
    Copyright (C) 2003 Matthias Kretz <kretz@kde.org>
    Copyright (C) 2004 Frans Englich <frans.englich@telia.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.

    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 TDECMODULEPROXY_H
#define TDECMODULEPROXY_H

#include <tqwidget.h>
#include <tqstringlist.h>

#include <kservice.h>
#include <tdelibs_export.h>

class TDEAboutData;
class TDECModule;
class TDECModuleInfo;
class TDEInstance;
class TDEProcess;

/**
 * @ingroup tdecmodule
 *
 * @brief Encapsulates a TDECModule for embedding.
 *
 * TDECModuleProxy is a wrapper for TDECModule intended for cases where
 * modules are to be displayed. It ensures layout is consistent, handles
 * root/administrator modules and in general takes care of the details
 * needed for making a module available in an interface. A TDECModuleProxy
 * can be treated as a TQWidget, without worrying about the details specific
 * for modules such as library loading. TDECModuleProxy is not a sub class of TDECModule
 * but its API closely resembles TDECModule's.\n
 * Usually, an instance is created by passing one of the constructors a KService::Ptr,
 * TDECModuleInfo or simply the name of the module and then added to the layout as any
 * other widget. \n
 * When the user have changed the module, changed( bool ) as well as changed ( TDECModuleProxy * )
 * is emitted. TDECModuleProxy does not take care of prompting for saving - if the object is deleted while
 * changes is not saved the changes will be lost. changed() returns true if changes are unsaved. \n
 * \n
 * TDECModuleProxy does not take care of authorization of TDECModules. \n
 * TDECModuleProxy do lazy loading, meaning the library will not be loaded or
 * any other initialization done before its show() function is called. This means
 * modules will only be loaded when they are actually needed as well as it is possible to
 * load many TDECModuleProxy without any speed penalty.
 *
 * TDECModuleProxy should be used in all cases where modules are embedded in order to
 * promote code efficiency and usability consistency.
 *
 * @author Frans Englich <frans.englich@telia.com>
 * @author Matthias Kretz <kretz@kde.org>
 *
 */
class TDEUTILS_EXPORT TDECModuleProxy : public TQWidget
{
TQ_OBJECT


	friend class TDECModuleProxyRootCommunicatorImpl;

public:

	/**
	 * Constructs a TDECModuleProxy from a TDECModuleInfo class.
	 *
	 * @param info The TDECModuleInfo to construct the module from.
	 * @param withFallback If set to true and loading of the module fails,
	 * a alternative will be tried, resulting in the module appearing in its
	 * own window, if at all.
	 * The embedded module will be load()ed.
	 * @param parent the parent TQWidget.
	 * @param name the module's name.
	 * @param args This is used in the implementation and is internal.
	 * Use the default.
	 */
	TDECModuleProxy( const TDECModuleInfo & info, bool withFallback = true,
			TQWidget * parent = 0, const char * name = 0,
			const TQStringList & args = TQStringList() );

	/**
	 * Constructs a TDECModuleProxy from a module's service name, which is
	 * equivalent to the desktop file for the kcm without the ".desktop" part.
	 * Otherwise equal to the one above.
	 *
	 * @param serviceName The module's service name to construct from.
	 * @param withFallback If set to true and loading of the module fails,
	 * a alternative will be tried, resulting in the module appearing in its
	 * own window, if at all.
	 * The embedded module will be load()ed.
	 * @param parent the parent TQWidget.
	 * @param name the module's name.
	 * @param args This is used in the implementation and is internal.
	 * Use the default.
	 */
	TDECModuleProxy( const TQString& serviceName, bool withFallback = true,
			TQWidget * parent = 0, const char * name = 0,
			const TQStringList & args = TQStringList() );

	/**
	 * Constructs a TDECModuleProxy from KService. Otherwise equal to the one above.
	 *
	 * @param service The KService to construct from.
	 * @param withFallback If set to true and loading of the module fails,
	 * a alternative will be tried, resulting in the module appearing in its
	 * own window, if at all.
	 * The embedded module will be load()ed.
	 * @param parent the parent TQWidget.
	 * @param name the module's name.
	 * @param args This is used in the implementation and is internal.
	 * Use the default.
	 */
	TDECModuleProxy( const KService::Ptr& service, bool withFallback = true,
			TQWidget  * parent = 0, const char * name = 0,
			const TQStringList & args = TQStringList() );

	/**
	 * Default destructor
	 */
	~TDECModuleProxy();

	/**
	 * Calling it will cause the contained module to
	 * run its load() routine.
	 */
	void load();

	/**
	 * Calling it will cause the contained module to
	 * run its save() routine.
	 *
	 * If the module was not modified, it will not be asked
	 * to save.
	 */
	void save();

	/**
	 * @return the module's quickHelp();
	 */
	TQString quickHelp() const;

	/**
	 * @return the module's aboutData()
	 */
	const TDEAboutData * aboutData() const;

	/**
	 * @return the module's handbookDocPath()
	 */
	TQString handbookDocPath() const;

	/**
	 * @return the module's handbookSection()
	 */
	TQString handbookSection() const;

	/**
	 * @return what buttons the module
	 * needs
	 */
	int buttons() const;

	/**
	 * @return The module's custom root
	 * message, if it has one
	 * @deprecated
	 */
	TQString rootOnlyMsg() const;
	//KDE4 remove. There's a limit for convenience functions,
	// this one's available via moduleInfo()-> and realModule()->

	/**
	 * @return If the module is a root module.
	 * @deprecated
	 */
	bool useRootOnlyMsg() const;
	//KDE4 remove. There's a limit for convenience functions,
	// this one's available via moduleInfo()-> and realModule()->

	/**
	 * Returns the embedded TDECModule's TDEInstance.
	 * @return The module's TDEInstance.
	 * @deprecated
	 */
	TDEInstance * instance() const;
	//KDE4 remove. There's a limit for convenience functions,
	// this one's available via realModule()

	/**
	 * @return true if the module is modified
	 * and needs to be saved.
	 */
	bool changed() const;

	/**
	 * Returns whether the module is running in root mode. A module is in root mode
	 * when runAsRoot() has been called. A session under root user will never reach
	 * root mode.
	 *
	 * @note realModule() will return null when the module is running in root mode.
	 *
	 * @return true if the module is running with root privileges
	 * @since 3.4
	 */
	bool rootMode() const;

	/**
	 * Access to the actual module. However, if the module is
	 * running in root mode, see rootMode(), this function returns
	 * a NULL pointer, since the module is in another process. It may also
	 * return NULL if anything goes wrong.
	 *
	 * @return the encapsulated module.
	 */
	TDECModule* realModule() const;

	/**
	 * @return a TDECModuleInfo for the encapsulated
	 * module
	 */
	const TDECModuleInfo& moduleInfo() const;

	/**
	 * Returns the DCOP the module's DCOPClient
	 * and DCOPObject has(they are identical).
	 *
	 * @since 3.4
	 */
	TQCString dcopName() const;

public slots:

	/**
	 * Calling this will cause the module to be run in
	 * "administrator mode".
	 *
	 * @since 3.4
	 */
	void runAsRoot();

	/**
	 * Calling it will cause the contained module to
	 * load its default values.
	 */
	void defaults();

	/**
	 * Calling this, results in deleting the contained
	 * module, and unregistering from DCOP. A similar result is achieved
	 * by deleting the TDECModuleProxy itself.
	 *
	 * @since 3.4
	 */
	void deleteClient();

signals:

	/*
	 * This signal is emitted when the contained module is changed.
	 */
	void changed( bool state );

	/**
	 * This is emitted in the same situations as in the one above. Practical
	 * when several TDECModuleProxys are loaded.
	 *
	 * @since 3.4
	 */
	void changed( TDECModuleProxy* mod );

	/**
	 * When a module running with root privileges and exits, returns to normal mode, the
	 * childClosed() signal is emitted.
	 *
	 * @since 3.4
	 */
	void childClosed();

	/*
	 * This signal is relayed from the encapsulated module, and
	 * is equivalent to the module's own quickHelpChanged() signal.
	 *
	 * @since 3.4
	 */
	void quickHelpChanged();

protected:

	/**
	 * Reimplemented for internal purposes. Makes sure the encapsulated
	 * module is loaded before the show event is taken care of.
	 */
	void showEvent( TQShowEvent * );

	/**
	 * Internal intialization function, called by the constructors.
	 *
	 * @internal
	 * @since 3.4
	 */
	void init( const TDECModuleInfo& info );


	/**
	 * Emits the quickHelpChanged signal.
	 * @since 3.4
	 */
	void emitQuickHelpChanged();

private slots:

   /**
	* Calls the function @p function of the root module's TDECModuleProxy
	* DCOP interface.
	*
	* @param function the function signature of the function to call.
	* @since 3.4
	*/
	void callRootModule( const TQCString& function );

	/**
	 * This is called when the module exits from root mode. It zeroes
	 * pointers, deletes the embed window, and so forth.
	 *
	 * @since 3.4
	 */
	void rootExited();

	/**
	 * Makes sure the proper variables is set and signals are emitted.
	 */
	void moduleChanged( bool );

	/**
	 * Zeroes d->kcm
	 */
	void moduleDestroyed();

	/**
	 * Gets called by DCOP when an application closes.
	 * Is used to (try to) reload a KCM which previously
	 * was loaded.
	 *
	 * @since 3.4
	 */
	void applicationRemoved( const TQCString& app );

private:

	class TDECModuleProxyPrivate;
	TDECModuleProxyPrivate * d;
};

#endif // TDECMODULEPROXY_H