summaryrefslogtreecommitdiff
path: root/indra/newview/llchiclet.h
blob: bb5dc1e5500526769371351271175c0f8398b24e (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
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
/** 
* @file llchiclet.h
* @brief LLChiclet class header file
*
* $LicenseInfo:firstyear=2002&license=viewergpl$
* 
* Copyright (c) 2002-2009, Linden Research, Inc.
* 
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab.  Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
* 
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
* 
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
* 
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/

#ifndef LL_LLCHICLET_H
#define LL_LLCHICLET_H

#include "llavatariconctrl.h"
#include "llbutton.h"
#include "llpanel.h"
#include "lltextbox.h"
#include "lloutputmonitorctrl.h"
#include "llgroupmgr.h"

class LLVoiceControlPanel;
class LLMenuGL;
class LLIMFloater;

/*
 * Class for displaying amount of messages/notifications(unread).
*/
class LLChicletNotificationCounterCtrl : public LLTextBox
{
public:

	struct Params :	public LLInitParam::Block<Params, LLTextBox::Params>
	{
		Params()
		{};
	};

	/*
	 * Sets number of notifications
	*/
	virtual void setCounter(S32 counter);

	/*
	 * Returns number of notifications
	*/
	virtual S32 getCounter() const { return mCounter; }

	/*
	 * Returns width, required to display amount of notifications in text form.
	 * Width is the only valid value.
	*/
	/*virtual*/ LLRect getRequiredRect();

	/*
	 * Sets number of notifications using LLSD
	*/
	/*virtual*/ void setValue(const LLSD& value);

	/*
	 * Returns number of notifications wrapped in LLSD
	*/
	/*virtual*/ LLSD getValue() const;

protected:

	LLChicletNotificationCounterCtrl(const Params& p);
	friend class LLUICtrlFactory;

private:

	S32 mCounter;
	S32 mInitialWidth;
};

/*
 * Class for displaying avatar's icon in P2P chiclet.
*/
class LLChicletAvatarIconCtrl : public LLAvatarIconCtrl
{
public:

	struct Params :	public LLInitParam::Block<Params, LLAvatarIconCtrl::Params>
	{
		Params()
		{
			draw_tooltip(FALSE);
			mouse_opaque(FALSE);
			default_icon_name("Generic_Person");
		};
	};

protected:

	LLChicletAvatarIconCtrl(const Params& p);
	friend class LLUICtrlFactory;
};

/**
 * Class for displaying group's icon in Group chiclet.
 */
class LLChicletGroupIconCtrl : public LLIconCtrl
{
public:

	struct Params :	public LLInitParam::Block<Params, LLIconCtrl::Params>
	{
		Optional<std::string> default_icon;

		Params()
		 : default_icon("default_icon", "Generic_Group")
		{
		};
	};

	/**
	 * Sets icon, if value is LLUUID::null - default icon will be set.
	 */
	virtual void setValue(const LLSD& value );

protected:

	LLChicletGroupIconCtrl(const Params& p);
	friend class LLUICtrlFactory;

	std::string mDefaultIcon;
};

/*
 * Class for displaying of speaker's voice indicator 
*/
class LLChicletSpeakerCtrl : public LLOutputMonitorCtrl
{
public:

	struct Params : public LLInitParam::Block<Params, LLOutputMonitorCtrl::Params>
	{
		Params(){};
	};
protected:

	LLChicletSpeakerCtrl(const Params&p);
	friend class LLUICtrlFactory;
};

/*
 * Base class for all chiclets.
 */
class LLChiclet : public LLUICtrl
{
public:

	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
	{
		Optional<bool> show_counter;

		Params();
	};

	/*virtual*/ ~LLChiclet();

	/*
	 * Associates chat session id with chiclet.
	*/
	virtual void setSessionId(const LLUUID& session_id) { mSessionId = session_id; }

	/*
	 * Returns associated chat session.
	*/
	virtual const LLUUID& getSessionId() const { return mSessionId; }

	/*
	 * Sets number of unread notifications.
	*/
	virtual void setCounter(S32 counter) = 0;

	/*
	 * Returns number of unread notifications.
	*/
	virtual S32 getCounter() = 0;

	/*
	 * Sets show counter state.
	*/
	virtual void setShowCounter(bool show) { mShowCounter = show; }

	/*
	 * Returns show counter state.
	*/
	virtual bool getShowCounter() {return mShowCounter;};

	/*
	 * Connects chiclet clicked event with callback.
	*/
	/*virtual*/ boost::signals2::connection setLeftButtonClickCallback(
		const commit_callback_t& cb);

	typedef boost::function<void (LLChiclet* ctrl, const LLSD& param)> 
		chiclet_size_changed_callback_t;

	/*
	 * Connects chiclets size changed event with callback.
	*/
	virtual boost::signals2::connection setChicletSizeChangedCallback(
		const chiclet_size_changed_callback_t& cb);

	/*
	 * Sets IM Session id using LLSD
	*/
	/*virtual*/ LLSD getValue() const;

	/*
	 * Returns IM Session id using LLSD
	*/
	/*virtual*/ void setValue(const LLSD& value);

protected:

	friend class LLUICtrlFactory;
	LLChiclet(const Params& p);

	/*
	 * Notifies subscribers about click on chiclet.
	*/
	/*virtual*/ BOOL handleMouseDown(S32 x, S32 y, MASK mask);

	/*
	 * Notifies subscribers about chiclet size changed event.
	*/
	virtual void onChicletSizeChanged();

private:

	LLUUID mSessionId;

	bool mShowCounter;

	typedef boost::signals2::signal<void (LLChiclet* ctrl, const LLSD& param)> 
		chiclet_size_changed_signal_t;

	chiclet_size_changed_signal_t mChicletSizeChangedSignal;
};


/*
* Base class for Instant Message chiclets.
* IMChiclet displays icon, number of unread messages(optional)
* and voice chat status(optional).
*/
class LLIMChiclet : public LLChiclet
{
public:
	enum EType {
		TYPE_UNKNOWN,
		TYPE_IM,
		TYPE_GROUP,
		TYPE_AD_HOC
	};
	struct Params : public LLInitParam::Block<Params, LLChiclet::Params>
	{
		Optional<std::string> new_messages_icon_name;

		Params() : new_messages_icon_name("new_messages_icon_name", "icn_voice-localchat.tga")
		{}
	};

	
	/*virtual*/ ~LLIMChiclet() {};

	/*
	 * Sets IM session name. This name will be displayed in chiclet tooltip.
	*/
	virtual void setIMSessionName(const std::string& name) { setToolTip(name); }

	/*
	 * Sets id of person/group user is chatting with.
	 * Session id should be set before calling this
	*/
	virtual void setOtherParticipantId(const LLUUID& other_participant_id) { mOtherParticipantId = other_participant_id; }

	/*
	 * Gets id of person/group user is chatting with.
	 */
	virtual LLUUID getOtherParticipantId() { return mOtherParticipantId; }

	/*
	* Init Speaker Control with speaker's ID
	*/
	virtual void initSpeakerControl();

	/*
	 * set status (Shows/Hide) for voice control.
	*/
	virtual void setShowSpeaker(bool show);

	/*
	 * Returns voice chat status control visibility.
	*/
	virtual bool getShowSpeaker() {return mShowSpeaker;};

	/*
	* Shows/Hides for voice control for a chiclet.
	*/
	virtual void toggleSpeakerControl();

	/*
	* Shows/hides overlay icon concerning new unread messages.
	*/
	virtual void setShowNewMessagesIcon(bool show);

	/*
	* Returns visibility of overlay icon concerning new unread messages.
	*/
	virtual bool getShowNewMessagesIcon();

	virtual void draw();

	/**
	 * Determine whether given ID refers to a group or an IM chat session.
	 * 
	 * This is used when we need to chose what IM chiclet (P2P/group)
	 * class to instantiate.
	 * 
	 * @param session_id session ID.
	 * @return TYPE_GROUP in case of group chat session,
	 *         TYPE_IM in case of P2P session,
	 *         TYPE_UNKNOWN otherwise.
	 */
	static EType getIMSessionType(const LLUUID& session_id);

	/**
	 * The action taken on mouse down event.
	 * 
	 * Made public so that it can be triggered from outside
	 * (more specifically, from the Active IM window).
	 */
	void onMouseDown();

protected:

	LLIMChiclet(const LLIMChiclet::Params& p);

	/*virtual*/ BOOL handleMouseDown(S32 x, S32 y, MASK mask);

protected:

	bool mShowSpeaker;

	LLIconCtrl* mNewMessagesIcon;
	LLChicletNotificationCounterCtrl* mCounterCtrl;
	LLChicletSpeakerCtrl* mSpeakerCtrl;


	/** the id of another participant, either an avatar id or a group id*/
	LLUUID mOtherParticipantId;

	template<typename Container>
	struct CollectChicletCombiner {
		typedef Container result_type;

		template<typename InputIterator>
		Container operator()(InputIterator first, InputIterator last) const {
			Container c = Container();
			for (InputIterator iter = first; iter != last; iter++) {
				if (*iter != NULL) {
					c.push_back(*iter);
				}
			}
			return c;
		}
	};

public:
	static boost::signals2::signal<LLChiclet* (const LLUUID&),
			CollectChicletCombiner<std::list<LLChiclet*> > >
			sFindChicletsSignal;
};

/**
 * Implements P2P chiclet.
 */
class LLIMP2PChiclet : public LLIMChiclet
{
public:
	struct Params : public LLInitParam::Block<Params, LLIMChiclet::Params>
	{
		Optional<LLChicletAvatarIconCtrl::Params> avatar_icon;

		Optional<LLChicletNotificationCounterCtrl::Params> unread_notifications;

		Optional<LLChicletSpeakerCtrl::Params> speaker;

		Optional<bool>	show_speaker;

		Params();
	};

	/* virtual */ void setOtherParticipantId(const LLUUID& other_participant_id);

	/*
	* Sets number of unread messages. Will update chiclet's width if number text 
	* exceeds size of counter and notify it's parent about size change.
	*/
	/*virtual*/ void setCounter(S32);

	/*
	* Init Speaker Control with speaker's ID
	*/
	/*virtual*/ void initSpeakerControl();

	/*
	* Returns number of unread messages.
	*/
	/*virtual*/ S32 getCounter() { return mCounterCtrl->getCounter(); }

protected:
	LLIMP2PChiclet(const Params& p);
	friend class LLUICtrlFactory;

	/*
	* Creates chiclet popup menu. Will create P2P or Group IM Chat menu 
	* based on other participant's id.
	*/
	virtual void createPopupMenu();

	/*
	* Processes clicks on chiclet popup menu.
	*/
	virtual void onMenuItemClicked(const LLSD& user_data);

	/*
	* Displays popup menu.
	*/
	/*virtual*/ BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);

	/* 
	* Enables/disables menus based on relationship with other participant.
	*/
	virtual void updateMenuItems();

private:

	LLChicletAvatarIconCtrl* mChicletIconCtrl;
	LLMenuGL* mPopupMenu;
};

/**
 * Implements AD-HOC chiclet.
 */
class LLAdHocChiclet : public LLIMChiclet
{
public:
	struct Params : public LLInitParam::Block<Params, LLIMChiclet::Params>
	{
		Optional<LLChicletAvatarIconCtrl::Params> avatar_icon;

		Optional<LLChicletNotificationCounterCtrl::Params> unread_notifications;

		Optional<LLChicletSpeakerCtrl::Params> speaker;

		Optional<bool>	show_speaker;

		Optional<LLColor4>	avatar_icon_color;

		Params();
	};

	/**
	 * Sets session id.
	 * Session ID for group chat is actually Group ID.
	 */
	/*virtual*/ void setSessionId(const LLUUID& session_id);

	/*
	* Sets number of unread messages. Will update chiclet's width if number text 
	* exceeds size of counter and notify it's parent about size change.
	*/
	/*virtual*/ void setCounter(S32);

	/*
	* Keep Speaker Control with actual speaker's ID
	*/
	/*virtual*/ void draw();

	/*
	* Init Speaker Control with speaker's ID
	*/
	/*virtual*/ void initSpeakerControl();

	/*
	* Returns number of unread messages.
	*/
	/*virtual*/ S32 getCounter() { return mCounterCtrl->getCounter(); }

protected:
	LLAdHocChiclet(const Params& p);
	friend class LLUICtrlFactory;

	/*
	* Displays popup menu.
	*/
	virtual BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);

	/*
	* Finds a current speaker and resets the SpeakerControl with speaker's ID
	*/
	/*virtual*/ void switchToCurrentSpeaker();

private:

	LLChicletAvatarIconCtrl* mChicletIconCtrl;
	LLMenuGL* mPopupMenu;
};

/**
 * Implements Group chat chiclet.
 */
class LLIMGroupChiclet : public LLIMChiclet, public LLGroupMgrObserver
{
public:

	struct Params : public LLInitParam::Block<Params, LLIMChiclet::Params>
	{
		Optional<LLChicletGroupIconCtrl::Params> group_icon;

		Optional<LLChicletNotificationCounterCtrl::Params> unread_notifications;

		Optional<LLChicletSpeakerCtrl::Params> speaker;

		Optional<bool>	show_speaker;

		Params();
	};

	/**
	 * Sets session id.
	 * Session ID for group chat is actually Group ID.
	 */
	/*virtual*/ void setSessionId(const LLUUID& session_id);

	/*
	* Keep Speaker Control with actual speaker's ID
	*/
	/*virtual*/ void draw();

	/**
	 * Callback for LLGroupMgrObserver, we get this when group data is available or changed.
	 * Sets group icon.
	 */
	/*virtual*/ void changed(LLGroupChange gc);

	/*
	* Sets number of unread messages. Will update chiclet's width if number text 
	* exceeds size of counter and notify it's parent about size change.
	*/
	/*virtual*/ void setCounter(S32);

	/*
	* Init Speaker Control with speaker's ID
	*/
	/*virtual*/ void initSpeakerControl();

	/*
	* Returns number of unread messages.
	*/
	/*virtual*/ S32 getCounter() { return mCounterCtrl->getCounter(); }

	~LLIMGroupChiclet();

protected:
	LLIMGroupChiclet(const Params& p);
	friend class LLUICtrlFactory;

	/*
	* Finds a current speaker and resets the SpeakerControl with speaker's ID
	*/
	/*virtual*/ void switchToCurrentSpeaker();

	/*
	* Creates chiclet popup menu. Will create P2P or Group IM Chat menu 
	* based on other participant's id.
	*/
	virtual void createPopupMenu();

	/*
	* Processes clicks on chiclet popup menu.
	*/
	virtual void onMenuItemClicked(const LLSD& user_data);

	/*
	* Displays popup menu.
	*/
	/*virtual*/ BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);

private:

	LLChicletGroupIconCtrl* mChicletIconCtrl;
	LLMenuGL* mPopupMenu;
};

/*
 * Implements notification chiclet. Used to display total amount of unread messages 
 * across all IM sessions, total amount of system notifications.
*/
class LLNotificationChiclet : public LLChiclet
{
public:

	struct Params : public LLInitParam::Block<Params, LLChiclet::Params>
	{
		Optional<LLButton::Params> button;

		Optional<LLChicletNotificationCounterCtrl::Params> unread_notifications;

		Params();
	};

	/*virtual*/ void setCounter(S32 counter);

	// *TODO: mantipov: seems getCounter is not necessary for LLNotificationChiclet
	// but inherited interface requires it to implement. 
	// Probably it can be safe removed.
	/*virtual*/S32 getCounter() { return mCounter; }

	boost::signals2::connection setClickCallback(const commit_callback_t& cb);

	/*virtual*/ ~LLNotificationChiclet();

	// methods for updating a number of unread System notifications
	void incUreadSystemNotifications() { setCounter(++mUreadSystemNotifications); }
	void decUreadSystemNotifications() { setCounter(--mUreadSystemNotifications); }
	void setToggleState(BOOL toggled);

protected:
	// connect counter updaters to the corresponding signals
	void connectCounterUpdatersToSignal(std::string notification_type);

	LLNotificationChiclet(const Params& p);
	friend class LLUICtrlFactory;

	static S32 mUreadSystemNotifications;

protected:
	LLButton* mButton;
	S32 mCounter;
};

/*
 * Storage class for all IM chiclets. Provides mechanism to display, 
 * scroll, create, remove chiclets.
*/
class LLChicletPanel : public LLPanel
{
public:

	struct Params :	public LLInitParam::Block<Params, LLPanel::Params>
	{
		Optional<S32> chiclet_padding,
					  scrolling_offset;

		Optional<S32> min_width;

		Params();
	};

	virtual ~LLChicletPanel();

	/*
	 * Creates chiclet and adds it to chiclet list at specified index.
	*/
	template<class T> T* createChiclet(const LLUUID& session_id, S32 index);

	/*
	 * Creates chiclet and adds it to chiclet list at right.
	*/
	template<class T> T* createChiclet(const LLUUID& session_id);

	/*
	 * Returns pointer to chiclet of specified type at specified index.
	*/
	template<class T> T* getChiclet(S32 index);

	/*
	 * Returns pointer to LLChiclet at specified index.
	*/
	LLChiclet* getChiclet(S32 index) { return getChiclet<LLChiclet>(index); }

	/*
	 * Searches a chiclet using IM session id.
	*/
	template<class T> T* findChiclet(const LLUUID& im_session_id);

	/*
	 * Returns number of hosted chiclets.
	*/
	S32 getChicletCount() {return mChicletList.size();};

	/*
	 * Returns index of chiclet in list.
	*/
	S32 getChicletIndex(const LLChiclet* chiclet);

	/*
	 * Removes chiclet by index.
	*/
	void removeChiclet(S32 index);

	/*
	 * Removes chiclet by pointer.
	*/
	void removeChiclet(LLChiclet* chiclet);

	/*
	 * Removes chiclet by IM session id.
	*/
	void removeChiclet(const LLUUID& im_session_id);

	/*
	 * Removes all chiclets.
	*/
	void removeAll();

	/*
	 * Scrolls the panel to the specified chiclet
	 */
	void scrollToChiclet(const LLChiclet* chiclet);

	boost::signals2::connection setChicletClickedCallback(
		const commit_callback_t& cb);

	/*virtual*/ BOOL postBuild();

	/*
	* Handler for the Voice Client's signal. Finds a corresponding chiclet and toggles its SpeakerControl
	*/
	void onCurrentVoiceChannelChanged(const LLUUID& session_id);

	/*
	 * Reshapes controls and rearranges chiclets if needed.
	*/
	/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE );

	/*virtual*/ void draw();

	S32 getMinWidth() const { return mMinWidth; }

protected:
	LLChicletPanel(const Params&p);
	friend class LLUICtrlFactory;

	S32 calcChickletPanleWidth();

	/*
	 * Adds chiclet to list and rearranges all chiclets.
	*/
	bool addChiclet(LLChiclet*, S32 index);

	/*
	 * Arranges chiclets.
	*/
	void arrange();

	/*
	 * Returns true if chiclets can be scrolled right.
	*/
	bool canScrollRight();

	/*
	* Returns true if chiclets can be scrolled left.
	*/
	bool canScrollLeft();

	/*
	* Shows or hides chiclet scroll buttons if chiclets can or can not be scrolled.
	*/
	void showScrollButtonsIfNeeded();

	/*
	 * Shifts chiclets left or right.
	*/
	void shiftChiclets(S32 offset, S32 start_index = 0);

	/*
	 * Removes gaps between first chiclet and scroll area left side,
	 * last chiclet and scroll area right side.
	*/
	void trimChiclets();

	/*
	 * Scrolls chiclets to right or left.
	*/
	void scroll(S32 offset);

	/*
	 * Verifies that chiclets can be scrolled left, then calls scroll()
	*/
	void scrollLeft();

	/*
	 * Verifies that chiclets can be scrolled right, then calls scroll()
	*/
	void scrollRight();

	/*
	 * Callback for left scroll button clicked
	*/
	void onLeftScrollClick();

	/*
	* Callback for right scroll button clicked
	*/
	void onRightScrollClick();

	/*
	* Callback for right scroll button held down event
	*/
	void onLeftScrollHeldDown();

	/*
	 * Callback for left scroll button held down event
	 */
	void onRightScrollHeldDown();

	/*
	 * Callback for mouse wheel scrolled, calls scrollRight() or scrollLeft()
	*/
	BOOL handleScrollWheel(S32 x, S32 y, S32 clicks);

	/*
	 * Notifies subscribers about click on chiclet.
	 * Do not place any code here, instead subscribe on event (see setChicletClickedCallback).
	*/
	void onChicletClick(LLUICtrl*ctrl,const LLSD&param);

	/*
	 * Callback for chiclet size changed event, rearranges chiclets.
	*/
	void onChicletSizeChanged(LLChiclet* ctrl, const LLSD& param);

	typedef std::vector<LLChiclet*> chiclet_list_t;

	/*
	 * Removes chiclet from scroll area and chiclet list.
	*/
	void removeChiclet(chiclet_list_t::iterator it);

	S32 getChicletPadding() { return mChicletPadding; }

	S32 getScrollingOffset() { return mScrollingOffset; }

	bool isAnyIMFloaterDoked();

protected:

	chiclet_list_t mChicletList;
	LLButton* mLeftScrollButton;
	LLButton* mRightScrollButton;
	LLPanel* mScrollArea;

	S32 mChicletPadding;
	S32 mScrollingOffset;
	S32 mMinWidth;
	bool mShowControls;
	static const S32 s_scroll_ratio;
};

template<class T> 
T* LLChicletPanel::createChiclet(const LLUUID& session_id, S32 index)
{
	typename T::Params params;
	T* chiclet = LLUICtrlFactory::create<T>(params);
	if(!chiclet)
	{
		llwarns << "Could not create chiclet" << llendl;
		return NULL;
	}
	if(!addChiclet(chiclet, index))
	{
		delete chiclet;
		llwarns << "Could not add chiclet to chiclet panel" << llendl;
		return NULL;
	}

	if (!isAnyIMFloaterDoked())
	{
		scrollToChiclet(chiclet);
	}

	chiclet->setSessionId(session_id);

	return chiclet;
}

template<class T>
T* LLChicletPanel::createChiclet(const LLUUID& session_id)
{
	return createChiclet<T>(session_id, mChicletList.size());
}

template<class T>
T* LLChicletPanel::findChiclet(const LLUUID& im_session_id)
{
	if(im_session_id.isNull())
	{
		return NULL;
	}

	chiclet_list_t::const_iterator it = mChicletList.begin();
	for( ; mChicletList.end() != it; ++it)
	{
		LLChiclet* chiclet = *it;

		if(chiclet->getSessionId() == im_session_id)
		{
			T* result = dynamic_cast<T*>(chiclet);
			if(!result && chiclet)
			{
				llwarns << "Found chiclet but of wrong type " << llendl;
			}
			return result;
		}
	}
	return NULL;
}

template<class T> T* LLChicletPanel::getChiclet(S32 index)
{
	if(index < 0 || index >= getChicletCount())
	{
		return NULL;
	}

	LLChiclet* chiclet = mChicletList[index];
	T*result = dynamic_cast<T*>(chiclet);
	if(!result && chiclet)
	{
		llwarns << "Found chiclet but of wrong type " << llendl;
	}
	return result;
}

#endif // LL_LLCHICLET_H