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source: trunk/src/helpers/cctl_tooltip.c@ 91

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Last change on this file since 91 was 91, checked in by umoeller, 24 years ago
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1
2	/*
3	*@@sourcefile cctl_tooltip.c:
4	* implementation for the "tooltip" common control.
5	* See comctl.c for an overview.
6	*
7	* This has been extracted from comctl.c with V0.9.3 (2000-05-21) [umoeller].
8	*
9	* Note: Version numbering in this file relates to XWorkplace version
10	* numbering.
11	*
12	*@@header "helpers\comctl.h"
13	*@@added V0.9.3 (2000-05-21) [umoeller].
14	*/
15
16	/*
17	* Copyright (C) 1997-2000 Ulrich Mller.
18	* This file is part of the "XWorkplace helpers" source package.
19	* This is free software; you can redistribute it and/or modify
20	* it under the terms of the GNU General Public License as published
21	* by the Free Software Foundation, in version 2 as it comes in the
22	* "COPYING" file of the XWorkplace main distribution.
23	* This program is distributed in the hope that it will be useful,
24	* but WITHOUT ANY WARRANTY; without even the implied warranty of
25	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26	* GNU General Public License for more details.
27	*/
28
29	#define OS2EMX_PLAIN_CHAR
30	// this is needed for "os2emx.h"; if this is defined,
31	// emx will define PSZ as _signed_ char, otherwise
32	// as unsigned char
33
34	#define INCL_DOSEXCEPTIONS
35	#define INCL_DOSPROCESS
36	#define INCL_DOSSEMAPHORES
37	#define INCL_DOSERRORS
38
39	#define INCL_WINWINDOWMGR
40	#define INCL_WINFRAMEMGR
41	#define INCL_WINMESSAGEMGR
42	#define INCL_WININPUT
43	#define INCL_WINPOINTERS
44	#define INCL_WINTRACKRECT
45	#define INCL_WINTIMER
46	#define INCL_WINSYS
47
48	#define INCL_WINRECTANGLES /// xxx temporary
49
50	#define INCL_WINMENUS
51	#define INCL_WINSTATICS
52	#define INCL_WINBUTTONS
53	#define INCL_WINSTDCNR
54
55	#define INCL_GPIPRIMITIVES
56	#define INCL_GPILOGCOLORTABLE
57	#define INCL_GPILCIDS
58	#define INCL_GPIPATHS
59	#define INCL_GPIREGIONS
60	#define INCL_GPIBITMAPS // added V0.9.1 (2000-01-04) [umoeller]: needed for EMX headers
61	#include <os2.h>
62
63	#include <stdlib.h>
64	#include <stdio.h>
65	#include <string.h>
66	#include <setjmp.h> // needed for except.h
67	#include <assert.h> // needed for except.h
68
69	#include "setup.h" // code generation and debugging options
70
71	#include "helpers\cnrh.h"
72	#include "helpers\except.h" // exception handling
73	#include "helpers\gpih.h"
74	#include "helpers\linklist.h"
75	#include "helpers\winh.h"
76
77	#include "helpers\comctl.h"
78
79	#pragma hdrstop
80
81	/*
82	*@@category: Helpers\PM helpers\Window classes\Tooltips
83	* See cctl_tooltip.c.
84	*/
85
86	/* ******************************************************************
87	*
88	* Global variables
89	*
90	********************************************************************/
91
92	// linked list of all tools which were subclassed for tooltip
93	HMTX G_hmtxSubclassedTools = NULLHANDLE;
94	LINKLIST G_llSubclassedTools; // linked list of SUBCLASSEDTOOL items
95
96	/* ******************************************************************
97	*
98	* "Tooltip" control
99	*
100	********************************************************************/
101
102	/*
103	*@@ ctlRegisterTooltip:
104	* this registers the Tooltip window class (ctl_fnwpTooltip)
105	* for an application. This is required before the tooltip
106	* control can be used.
107	*
108	*@@added V0.9.0 [umoeller]
109	*/
110
111	BOOL ctlRegisterTooltip(HAB hab)
112	{
113	return (WinRegisterClass(hab,
114	COMCTL_TOOLTIP_CLASS,
115	ctl_fnwpTooltip,
116	CS_HITTEST, // class styles;
117	// CS_FRAME not working,
118	// CS_CLIPSIBLINGS not working
119	sizeof(PVOID)*2)); // addt'l bytes to reserve:
120	// one pointer for QWL_USER,
121	// one more for instance data
122	}
123
124	/* ******************************************************************
125	*
126	* Subclassing
127	*
128	********************************************************************/
129
130	/*
131	*@@ LockSubclassedTools:
132	* locks the global list of subclassed tools.
133	*
134	*@@added V0.9.12 (2001-04-28) [umoeller]
135	*/
136
137	BOOL LockSubclassedTools(VOID)
138	{
139	if (!G_hmtxSubclassedTools)
140	{
141	// first call:
142
143	// initialize the list
144	lstInit(&G_llSubclassedTools,
145	TRUE); // auto-free
146
147	// create mutex and request it right away
148	return (!DosCreateMutexSem(NULL,
149	&G_hmtxSubclassedTools,
150	0,
151	TRUE)); // request!
152	}
153
154	return (!WinRequestMutexSem(G_hmtxSubclassedTools, SEM_INDEFINITE_WAIT));
155	}
156
157	/*
158	*@@ UnlockSubclassedTools:
159	* unlocks the global list of subclassed tools.
160	*
161	*@@added V0.9.12 (2001-04-28) [umoeller]
162	*@@changed V0.9.12 (2001-05-03) [umoeller]: this did nothing... fixed
163	*/
164
165	VOID UnlockSubclassedTools(VOID)
166	{
167	DosReleaseMutexSem(G_hmtxSubclassedTools); // was missing V0.9.12 (2001-05-03) [umoeller]
168	}
169
170	/*
171	*@@ SUBCLASSEDTOOL:
172	* structure created for each control which is
173	* subclassed by the tooltip control (ctl_fnwpTooltip).
174	*
175	*@@added V0.9.0 [umoeller]
176	*/
177
178	typedef struct _SUBCLASSEDTOOL
179	{
180	HWND hwndTool;
181	PFNWP pfnwpOrig;
182	HWND hwndTooltip;
183	HAB hab;
184	} SUBCLASSEDTOOL, *PSUBCLASSEDTOOL;
185
186	/*
187	*@@ FindSubclassedTool:
188	* returns the SUBCLASSEDTOOL struct from the
189	* global list which matches hwndTool or NULL
190	* if not found.
191	*
192	* Preconditions: Caller must hold the subclassed
193	* tools mutex.
194	*
195	*@@added V0.9.12 (2001-04-28) [umoeller]
196	*/
197
198	PSUBCLASSEDTOOL FindSubclassedTool(HWND hwndTool)
199	{
200	PLISTNODE pNode = lstQueryFirstNode(&G_llSubclassedTools);
201	while (pNode)
202	{
203	PSUBCLASSEDTOOL pstThis = (PSUBCLASSEDTOOL)pNode->pItemData;
204	if (pstThis->hwndTool == hwndTool)
205	{
206	return (pstThis);
207	}
208	pNode = pNode->pNext;
209	}
210
211	return (NULL);
212	}
213
214	/*
215	*@@ ctl_fnwpSubclassedTool:
216	* window procedure for tools which were subclassed
217	* to support tooltips.
218	*
219	*@@added V0.9.0 [umoeller]
220	*@@changed V0.9.12 (2001-04-28) [umoeller]: added mutex protection
221	*/
222
223	MRESULT EXPENTRY ctl_fnwpSubclassedTool(HWND hwndTool, ULONG msg, MPARAM mp1, MPARAM mp2)
224	{
225	MRESULT mrc = 0;
226
227	PFNWP pfnwpOrig = NULL;
228
229	if (LockSubclassedTools())
230	{
231	PSUBCLASSEDTOOL pst = FindSubclassedTool(hwndTool);
232
233	switch (msg)
234	{
235	case WM_MOUSEMOVE:
236	case WM_BUTTON1DOWN:
237	case WM_BUTTON1UP:
238	case WM_BUTTON2DOWN:
239	case WM_BUTTON2UP:
240	case WM_BUTTON3DOWN:
241	case WM_BUTTON3UP:
242	{
243	QMSG qmsg;
244	qmsg.hwnd = hwndTool;
245	qmsg.msg = msg;
246	qmsg.mp1 = mp1;
247	qmsg.mp2 = mp2;
248	// _Pmpf((__FUNCTION__ ": sending TTM_RELAYEVENT"));
249	WinSendMsg(pst->hwndTooltip,
250	TTM_RELAYEVENT,
251	(MPARAM)0,
252	(MPARAM)&qmsg);
253	pfnwpOrig = pst->pfnwpOrig; // call default
254	break; }
255
256	case WM_DESTROY:
257	lstRemoveItem(&G_llSubclassedTools, pst); // this frees the item
258	pfnwpOrig = pst->pfnwpOrig; // call default
259	break;
260
261	default:
262	pfnwpOrig = pst->pfnwpOrig; // call default
263	}
264
265	UnlockSubclassedTools();
266	}
267
268	if (pfnwpOrig)
269	mrc = (pfnwpOrig)(hwndTool, msg, mp1, mp2);
270
271	return (mrc);
272	}
273
274	/*
275	*@@ SubclassTool:
276	* this gets called from ctl_fnwpTooltip if a control
277	* is to be subclassed to support mouse messaging
278	* (TTF_SUBCLASS flag).
279	*
280	* Preconditions: Caller must hold the subclassed
281	* tools mutex.
282	*
283	*@@added V0.9.0 [umoeller]
284	*@@changed V0.9.12 (2001-04-28) [umoeller]: renamed from SubclassToolForToolInfo
285	*/
286
287	BOOL SubclassTool(HWND hwndTooltip,
288	HWND hwndTool)
289	{
290	BOOL brc = FALSE;
291
292	// make sure the tool is not on the list yet
293	// V0.9.12 (2001-04-28) [umoeller]
294	if (!FindSubclassedTool(hwndTool))
295	{
296	PFNWP pfnwpOrig = WinSubclassWindow(hwndTool,
297	ctl_fnwpSubclassedTool);
298	if (pfnwpOrig)
299	{
300	PSUBCLASSEDTOOL pst = (PSUBCLASSEDTOOL)malloc(sizeof(SUBCLASSEDTOOL));
301	if (pst)
302	{
303	pst->pfnwpOrig = pfnwpOrig;
304	pst->hwndTooltip = hwndTooltip;
305	pst->hwndTool = hwndTool;
306	pst->hab = WinQueryAnchorBlock(hwndTool);
307
308	brc = !!lstAppendItem(&G_llSubclassedTools, pst);
309	}
310	}
311	}
312
313	return (brc);
314	}
315
316	/*
317	*@@ UnSubclassTool:
318	* un-subclasses a tool previously subclassed by
319	* SubclassToolForToolinfo.
320	*
321	* Preconditions: Caller must hold the subclassed
322	* tools mutex.
323	*
324	*@@added V0.9.12 (2001-04-28) [umoeller]
325	*/
326
327	BOOL UnSubclassTool(HWND hwndTool)
328	{
329	PSUBCLASSEDTOOL pst = FindSubclassedTool(hwndTool);
330	if (pst)
331	{
332	WinSubclassWindow(hwndTool,
333	pst->pfnwpOrig);
334	// orig winproc == un-subclass
335	return (lstRemoveItem(&G_llSubclassedTools, pst));
336	// this frees the item
337	}
338
339	return (FALSE);
340	}
341
342	/* ******************************************************************
343	*
344	* Implementation
345	*
346	********************************************************************/
347
348	/*
349	*@@ TOOLTIPDATA:
350	* private data structure stored in the window
351	* words of ctl_fnwpTooltip to hold information for
352	* a tooltip instance.
353	*
354	*@@added V0.9.0 [umoeller]
355	*/
356
357	typedef struct _TOOLTIPDATA
358	{
359	HWND hwndOwner; // from WM_CREATE
360	HAB hab; // from WM_CREATE
361	USHORT usTooltipID; // from WM_CREATE
362
363	LONG cxScreen,
364	cyScreen;
365
366	BOOL fIsActive; // TRUE per default; changed by TTM_ACTIVATE
367
368	ULONG idTimerInitial, // if != 0, "initial" timer is running
369	idTimerAutopop; // if != 0, "autopop" (hide) timer is running
370
371	ULONG ulTimeoutInitial, // "initial" timer timeout (ms)
372	ulTimeoutAutopop, // "autopop" (hide) timer timeout (ms)
373	ulTimeoutReshow; // "reshow" timer timeout (ms)
374
375	LINKLIST llTools; // linked list of TOOLINFO structures
376	// containing the tools
377	FONTMETRICS fontmetrics; // current font
378	LONG lForeColor, // current foreground color
379	lBackColor, // current background color
380	l3DHiColor, // 3D border light color
381	l3DLoColor; // 3D border dark color
382	PSZ pszPaintText; // text to paint (new buffer)
383
384	POINTL ptlPointerLast; // last mouse pointer position
385
386	PTOOLINFO ptiMouseOver; // tool info over which the mouse resides
387
388	BOOL fIsVisible; // TRUE if tooltip is visible
389
390	// CHAR szTextBuf[256]; // static buffer for copying/loading strings
391	} TOOLTIPDATA, *PTOOLTIPDATA;
392
393	// timer IDs
394	#define TOOLTIP_ID_TIMER_INITIAL 1
395	#define TOOLTIP_ID_TIMER_AUTOPOP 2
396
397	// tooltip window border (free spaces)
398	#define TOOLTIP_CX_BORDER 5
399	#define TOOLTIP_CY_BORDER 3
400
401	/*
402	*@@ UpdateTooltipPresColors:
403	* this gets called during WM_CREATE and WM_PRESPARAMCHANGED
404	* in ctl_fnwpTooltip to set the colors in TOOLTIPDATA according
405	* to the control's presparams.
406	*/
407
408	VOID UpdateTooltipPresColors(HWND hwndTooltip) // in: tooltip control
409	{
410	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
411
412	// tooltip background color:
413	pttd->lBackColor = winhQueryPresColor(hwndTooltip,
414	PP_MENUBACKGROUNDCOLOR,
415	FALSE, // no inherit
416	SYSCLR_ENTRYFIELD);
417	// tooltip text color:
418	pttd->lForeColor = winhQueryPresColor(hwndTooltip,
419	PP_MENUFOREGROUNDCOLOR,
420	FALSE, // no inherit
421	SYSCLR_WINDOWTEXT);
422	// 3D border light color:
423	pttd->l3DHiColor = winhQueryPresColor(hwndTooltip,
424	PP_MENUHILITEFGNDCOLOR,
425	FALSE, // no inherit
426	SYSCLR_WINDOWTEXT);
427	// 3D border dark color:
428	pttd->l3DLoColor = winhQueryPresColor(hwndTooltip,
429	PP_MENUHILITEBGNDCOLOR,
430	FALSE, // no inherit
431	SYSCLR_WINDOWTEXT);
432	}
433
434	/*
435	*@@ TtmCreate:
436	* implementation for WM_CREATE in ctl_fnwpTooltip.
437	*
438	*@@added V0.9.13 (2001-06-21) [umoeller]
439	*/
440
441	MRESULT TtmCreate(HWND hwndTooltip,
442	MPARAM mp2)
443	{
444	PTOOLTIPDATA pttd;
445	PCREATESTRUCT pcs = (PCREATESTRUCT)mp2;
446
447	// allocate and initialize tooltip data
448	pttd = (PTOOLTIPDATA)malloc(sizeof(TOOLTIPDATA));
449	if (pttd)
450	{
451	CHAR szFont[256];
452	memset(pttd, 0, sizeof(TOOLTIPDATA));
453	WinSetWindowPtr(hwndTooltip, 1, pttd);
454
455	pttd->hwndOwner = pcs->hwndOwner;
456	pttd->hab = WinQueryAnchorBlock(hwndTooltip);
457	pttd->usTooltipID = pcs->id;
458
459	pttd->cxScreen = WinQuerySysValue(HWND_DESKTOP, SV_CXSCREEN);
460	pttd->cyScreen = WinQuerySysValue(HWND_DESKTOP, SV_CYSCREEN);
461
462	pttd->fIsActive = TRUE;
463
464	// default timeouts
465	pttd->ulTimeoutInitial = 1000;
466	pttd->ulTimeoutAutopop = 5000;
467	pttd->ulTimeoutReshow = 500;
468
469	// get colors from presparams/syscolors
470	UpdateTooltipPresColors(hwndTooltip);
471
472	// check if font presparam set
473	if (WinQueryPresParam(hwndTooltip,
474	PP_FONTNAMESIZE, 0,
475	NULL,
476	sizeof(szFont),
477	szFont,
478	QPF_NOINHERIT)
479	== 0)
480	{
481	// no: set default font presparam
482	// (we never want the System Proportional font)
483	winhSetWindowFont(hwndTooltip,
484	NULL); // default (WarpSans or 8.Helv)
485	}
486
487	pttd->pszPaintText = strdup("undefined");
488
489	lstInit(&pttd->llTools, TRUE); // auto-free items
490
491	// override CREATESTRUCT
492	WinSetWindowPos(hwndTooltip,
493	HWND_TOP,
494	50, 50,
495	100, 100,
496	SWP_MOVE \| SWP_SIZE \| SWP_ZORDER \| SWP_HIDE);
497
498	return (MPARAM)FALSE;
499	}
500	else
501	// malloc failed:
502	return (MPARAM)TRUE;
503	}
504
505	/*
506	*@@ TtmTimer:
507	* implementation for WM_TIMER in ctl_fnwpTooltip.
508	*
509	*@@added V0.9.13 (2001-06-21) [umoeller]
510	*/
511
512	BOOL TtmTimer(HWND hwndTooltip, MPARAM mp1)
513	{
514	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
515	USHORT usTimer = SHORT1FROMMP(mp1);
516
517	switch (usTimer)
518	{
519	case TOOLTIP_ID_TIMER_INITIAL:
520	// _Pmpf(("WM_TIMER: Stopping initial timer: %d", usTimer));
521	// _Pmpf((__FUNCTION__ ": TOOLTIP_ID_TIMER_INITIAL"));
522	WinStopTimer(pttd->hab,
523	hwndTooltip,
524	usTimer);
525	pttd->idTimerInitial = 0;
526
527	if (pttd->fIsActive)
528	// show tooltip
529	WinPostMsg(hwndTooltip, TTM_SHOWTOOLTIPNOW, (MPARAM)TRUE, 0);
530	break;
531
532	case TOOLTIP_ID_TIMER_AUTOPOP:
533	// _Pmpf(("WM_TIMER: Stopping autopop timer: %d", usTimer));
534	WinStopTimer(pttd->hab,
535	hwndTooltip,
536	usTimer);
537	pttd->idTimerAutopop = 0;
538	WinPostMsg(hwndTooltip, TTM_SHOWTOOLTIPNOW, (MPARAM)FALSE, 0);
539	break;
540
541	default:
542	return FALSE;
543	} // end switch
544
545	return (TRUE);
546	}
547
548	/*
549	*@@ TtmPaint:
550	* implementation for WM_PAINT in ctl_fnwpTooltip.
551	*
552	*@@added V0.9.1 (99-11-30) [umoeller]
553	*/
554
555	VOID TtmPaint(HWND hwndTooltip)
556	{
557	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
558	HPS hps = WinBeginPaint(hwndTooltip, NULLHANDLE, NULL);
559	POINTL ptl = {0, 0};
560	RECTL rclWindow,
561	rclWindowBak;
562	ULONG ulStyle = WinQueryWindowULong(hwndTooltip, QWL_STYLE);
563
564	ULONG ulRounding = 0;
565	if (ulStyle & TTS_ROUNDED)
566	ulRounding = TT_ROUNDING;
567
568
569	gpihSwitchToRGB(hps);
570
571	// get tooltip size; this has been properly calculated
572	// by TTM_SHOWTOOLTIPNOW earlier
573	WinQueryWindowRect(hwndTooltip, &rclWindow);
574	memcpy(&rclWindowBak, &rclWindow, sizeof(RECTL));
575
576	if (ulStyle & TTS_SHADOW)
577	{
578	// if shadows are on, the window is too large;
579	// make rectl smaller for rest of paint
580	rclWindow.xRight -= TT_SHADOWOFS;
581	rclWindow.yBottom += TT_SHADOWOFS;
582	// restore old pattern
583	GpiSetPattern(hps, PATSYM_DEFAULT);
584	}
585
586	// draw shadow
587	if (ulStyle & TTS_SHADOW)
588	{
589	GpiSetColor(hps, CLR_BLACK);
590	GpiSetPattern(hps, PATSYM_HALFTONE);
591	ptl.x = rclWindowBak.xLeft + TT_SHADOWOFS;
592	ptl.y = rclWindowBak.yBottom;
593	GpiMove(hps, &ptl);
594	ptl.x = rclWindowBak.xRight - 1;
595	ptl.y = rclWindowBak.yTop - TT_SHADOWOFS;
596	GpiBox(hps,
597	DRO_FILL,
598	&ptl,
599	ulRounding, ulRounding);
600	// restore pattern
601	GpiSetPattern(hps, PATSYM_DEFAULT);
602	}
603
604	// draw "real" rectangle
605	ptl.x = rclWindow.xLeft;
606	ptl.y = rclWindow.yBottom;
607	GpiMove(hps, &ptl);
608	ptl.x = rclWindow.xRight - 1;
609	ptl.y = rclWindow.yTop - 1;
610	GpiSetColor(hps, pttd->lBackColor);
611	GpiBox(hps,
612	DRO_FILL,
613	&ptl,
614	6, 6);
615
616	GpiSetColor(hps, pttd->lForeColor);
617	GpiBox(hps,
618	DRO_OUTLINE,
619	&ptl,
620	ulRounding, ulRounding);
621
622	if (pttd->pszPaintText)
623	{
624	RECTL rclText;
625	GpiSetColor(hps, pttd->lForeColor);
626	GpiSetBackColor(hps, pttd->lBackColor);
627	rclText.xLeft = rclWindow.xLeft + TOOLTIP_CX_BORDER;
628	rclText.xRight = rclWindow.xRight - TOOLTIP_CX_BORDER;
629	rclText.yBottom = rclWindow.yBottom + TOOLTIP_CY_BORDER;
630	rclText.yTop = rclWindow.yTop - TOOLTIP_CY_BORDER;
631	winhDrawFormattedText(hps,
632	&rclText,
633	pttd->pszPaintText,
634	DT_LEFT \| DT_TOP \| DT_WORDBREAK);
635	}
636
637	WinEndPaint(hps);
638	}
639
640	/*
641	*@@ TtmDestroy:
642	* implementation for WM_DESTROY in ctl_fnwpTooltip.
643	*
644	*@@added V0.9.13 (2001-06-21) [umoeller]
645	*/
646
647	VOID TtmDestroy(HWND hwndTooltip)
648	{
649	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
650	// stop timers
651	if (pttd->idTimerInitial)
652	WinStopTimer(pttd->hab,
653	hwndTooltip,
654	pttd->idTimerInitial);
655	if (pttd->idTimerAutopop)
656	WinStopTimer(pttd->hab,
657	hwndTooltip,
658	pttd->idTimerAutopop);
659	if (pttd->pszPaintText)
660	free(pttd->pszPaintText);
661
662	// un-subclass all tools that we subclassed
663	// V0.9.12 (2001-04-28) [umoeller]
664	if (LockSubclassedTools())
665	{
666	PLISTNODE pNode;
667	PSUBCLASSEDTOOL pst;
668	for (pNode = lstQueryFirstNode(&pttd->llTools);
669	pNode;
670	pNode = pNode->pNext)
671	{
672	PTOOLINFO pti = (PTOOLINFO)pNode->pItemData;
673	if (pst = FindSubclassedTool(pti->hwndTool))
674	UnSubclassTool(pti->hwndTool);
675	}
676
677	UnlockSubclassedTools();
678	}
679	// end V0.9.12 (2001-04-28) [umoeller]
680
681	lstClear(&pttd->llTools);
682
683	free(pttd);
684	}
685
686	/*
687	*@@ TtmAddTool:
688	* implementation for TTM_ADDTOOL in ctl_fnwpTooltip.
689	*
690	*@@added V0.9.13 (2001-06-21) [umoeller]
691	*/
692
693	MRESULT TtmAddTool(HWND hwndTooltip, MPARAM mp2)
694	{
695	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
696	if (mp2)
697	{
698	PTOOLINFO ptiPassed = (PTOOLINFO)mp2,
699	ptiNew = (PTOOLINFO)malloc(sizeof(TOOLINFO));
700	if (ptiNew)
701	{
702	memcpy(ptiNew, ptiPassed, sizeof(TOOLINFO));
703	lstAppendItem(&pttd->llTools,
704	ptiNew);
705
706	if ( (ptiPassed->ulFlags & TTF_SUBCLASS)
707	&& (LockSubclassedTools()) // V0.9.12 (2001-04-28) [umoeller]
708	)
709	{
710	// caller wants this tool to be subclassed:
711	// well, do it then
712	SubclassTool(hwndTooltip,
713	ptiPassed->hwndTool);
714
715	UnlockSubclassedTools();
716	}
717
718	return ((MPARAM)TRUE);
719	}
720	}
721
722	return (MPARAM)FALSE;
723	}
724
725	/*
726	*@@ TtmDelTool:
727	* implementation for TTM_DELTOOL in ctl_fnwpTooltip.
728	*
729	*@@added V0.9.13 (2001-06-21) [umoeller]
730	*@@changed V0.9.13 (2001-06-21) [umoeller]: fixed missing unlock
731	*@@changed V0.9.13 (2001-06-21) [umoeller]: fixed endless loop
732	*/
733
734	VOID TtmDelTool(HWND hwndTooltip, MPARAM mp2)
735	{
736	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
737	PTOOLINFO ptiSearch = (PTOOLINFO)mp2;
738	if (ptiSearch)
739	{
740	PLISTNODE pToolNode = lstQueryFirstNode(&pttd->llTools);
741	while (pToolNode)
742	{
743	PTOOLINFO ptiThis = (PTOOLINFO)pToolNode->pItemData;
744	if ( (ptiThis->hwndToolOwner == ptiSearch->hwndToolOwner)
745	&& (ptiThis->hwndTool == ptiSearch->hwndTool)
746	)
747	{
748	// found:
749
750	// V0.9.12 (2001-04-28) [umoeller]
751	// unsubclass if this was subclassed
752	if (ptiThis->ulFlags & TTF_SUBCLASS)
753	{
754	if (LockSubclassedTools())
755	{
756	UnSubclassTool(ptiSearch->hwndTool);
757
758	UnlockSubclassedTools();
759	// was missing V0.9.13 (2001-06-21) [umoeller]
760	}
761	}
762
763	// remove the tool from the list
764	lstRemoveNode(&pttd->llTools, pToolNode);
765
766	break;
767	}
768
769	pToolNode = pToolNode->pNext;
770	// fixed endless loop V0.9.13 (2001-06-21) [umoeller]
771	}
772	}
773	}
774
775	/*
776	*@@ TtmRelayEvent:
777	* implementation for TTM_RELAYEVENT in ctl_fnwpTooltip.
778	*
779	*@@added V0.9.13 (2001-06-21) [umoeller]
780	*/
781
782	VOID TtmRelayEvent(HWND hwndTooltip, MPARAM mp2)
783	{
784	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
785	PQMSG pqmsg = (PQMSG)mp2;
786	if (pqmsg)
787	{
788	POINTL ptlPointer;
789	PLISTNODE pToolNode;
790
791	if (pttd->idTimerInitial)
792	{
793	// _Pmpf(("TTM_RELAYEVENT: Stopping timer: %d", pttd->idTimerInitial));
794	WinStopTimer(pttd->hab,
795	hwndTooltip,
796	TOOLTIP_ID_TIMER_INITIAL);
797	pttd->idTimerInitial = 0;
798	}
799
800	WinQueryPointerPos(HWND_DESKTOP, &ptlPointer);
801
802	// find TOOLINFO from mouse position
803	pttd->ptiMouseOver = NULL;
804	pToolNode = lstQueryFirstNode(&pttd->llTools);
805	while (pToolNode)
806	{
807	PTOOLINFO pti = (PTOOLINFO)pToolNode->pItemData;
808	if (pti->hwndTool == pqmsg->hwnd)
809	{
810	// _Pmpf((__FUNCTION__ ": found tool"));
811	pttd->ptiMouseOver = pti;
812	break;
813	}
814	pToolNode = pToolNode->pNext;
815	}
816
817	if ( (ptlPointer.x != pttd->ptlPointerLast.x)
818	\|\| (ptlPointer.y != pttd->ptlPointerLast.y)
819	\|\| (pqmsg->msg == WM_BUTTON1DOWN)
820	\|\| (pqmsg->msg == WM_BUTTON2DOWN)
821	\|\| (pqmsg->msg == WM_BUTTON3DOWN)
822	)
823	{
824	// mouse pos changed:
825	// hide tooltip
826	WinPostMsg(hwndTooltip,
827	TTM_SHOWTOOLTIPNOW,
828	(MPARAM)FALSE,
829	0);
830	memcpy(&pttd->ptlPointerLast, &ptlPointer, sizeof(POINTL));
831
832	// _Pmpf((__FUNCTION__ ": pttd->ptiMouseOver: 0x%lX", pttd->ptiMouseOver));
833	// _Pmpf((__FUNCTION__ ": pttd->fIsActive: 0x%lX", pttd->fIsActive));
834	if ( (pttd->ptiMouseOver)
835	&& (pttd->fIsActive)
836	)
837	{
838	// tool found and tooltip is activated:
839	pttd->idTimerInitial = WinStartTimer(pttd->hab,
840	hwndTooltip,
841	TOOLTIP_ID_TIMER_INITIAL,
842	pttd->ulTimeoutInitial);
843	// _Pmpf(("TTM_RELAYEVENT: Started timer: %d", pttd->idTimerInitial));
844	}
845	}
846	} // end if (pqmsg)
847	}
848
849	/*
850	*@@ TtmGetDelayTime:
851	* implementation for TTM_GETDELAYTIME in ctl_fnwpTooltip.
852	*
853	*@@added V0.9.13 (2001-06-21) [umoeller]
854	*/
855
856	MRESULT TtmGetDelayTime(HWND hwndTooltip, MPARAM mp1)
857	{
858	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
859	switch ((ULONG)mp1)
860	{
861	case TTDT_AUTOPOP:
862	return (MRESULT)pttd->ulTimeoutAutopop;
863
864	case TTDT_INITIAL:
865	return (MRESULT)pttd->ulTimeoutInitial;
866
867	case TTDT_RESHOW:
868	return (MRESULT)pttd->ulTimeoutReshow;
869	}
870
871	return (0);
872	}
873
874	/*
875	*@@ TtmSetDelayTime:
876	* implementation for TTM_SETDELAYTIME in ctl_fnwpTooltip.
877	*
878	*@@added V0.9.13 (2001-06-21) [umoeller]
879	*/
880
881	VOID TtmSetDelayTime(HWND hwndTooltip, MPARAM mp1, MPARAM mp2)
882	{
883	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
884	ULONG iDelay = (ULONG)mp2;
885	switch (SHORT1FROMMP(mp1))
886	{
887	case TTDT_AUTOMATIC:
888	pttd->ulTimeoutInitial = iDelay;
889	pttd->ulTimeoutAutopop = iDelay * 5;
890	pttd->ulTimeoutReshow = iDelay / 2;
891	break;
892
893	case TTDT_AUTOPOP:
894	pttd->ulTimeoutAutopop = iDelay;
895	break;
896
897	case TTDT_INITIAL:
898	pttd->ulTimeoutInitial = iDelay;
899	break;
900
901	case TTDT_RESHOW:
902	pttd->ulTimeoutReshow = iDelay;
903	break;
904	}
905	}
906
907	/*
908	*@@ TtmGetText:
909	* implementation for TTM_GETTEXT in ctl_fnwpTooltip.
910	*
911	*@@added V0.9.13 (2001-06-21) [umoeller]
912	*/
913
914	VOID TtmGetText(HWND hwndTooltip, MPARAM mp2)
915	{
916	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
917	PTOOLINFO pti = (PTOOLINFO)mp2;
918
919	if (pti->pszText == PSZ_TEXTCALLBACK)
920	{
921	// TTN_NEEDTEXT notification desired:
922	// compose values for that msg
923	TOOLTIPTEXT ttt = {0};
924	ttt.hwndTooltip = hwndTooltip;
925	ttt.hwndTool = pti->hwndTool;
926	WinSendMsg(pti->hwndToolOwner,
927	WM_CONTROL,
928	MPFROM2SHORT(pttd->usTooltipID, // tooltip control wnd ID
929	TTN_NEEDTEXT),
930	&ttt);
931
932	// in case of error: set lpszText to NULL; this
933	// is not specified in the docs however.
934	pti->pszText = NULL;
935
936	switch (ttt.ulFormat)
937	{
938	case TTFMT_PSZ:
939	if (ttt.pszText)
940	pti->pszText = ttt.pszText;
941	break;
942
943	case TTFMT_STRINGRES:
944	// @@todo
945	break;
946	}
947	}
948	}
949
950	/*
951	*@@ TtmEnumTools:
952	* implementation for TTM_ENUMTOOLS in ctl_fnwpTooltip.
953	*
954	*@@added V0.9.13 (2001-06-21) [umoeller]
955	*/
956
957	MRESULT TtmEnumTools(HWND hwndTooltip, MPARAM mp1, MPARAM mp2)
958	{
959	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
960	PTOOLINFO ptiTarget = (PTOOLINFO)mp2;
961	if (ptiTarget)
962	{
963	PTOOLINFO ptiFound = (PTOOLINFO)lstItemFromIndex(&pttd->llTools,
964	SHORT1FROMMP(mp1));
965	if (ptiFound)
966	{
967	memcpy(ptiTarget, ptiFound, sizeof(TOOLINFO));
968	return (MRESULT)TRUE;
969	}
970	}
971
972	return (MRESULT)FALSE;
973	}
974
975	/*
976	*@@ TtmGetCurrentTool:
977	* implementation for TTM_GETCURRENTTOOL in ctl_fnwpTooltip.
978	*
979	*@@added V0.9.13 (2001-06-21) [umoeller]
980	*/
981
982	MRESULT TtmGetCurrentTool(HWND hwndTooltip, MPARAM mp2)
983	{
984	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
985	PTOOLINFO ptiTarget = (PTOOLINFO)mp2;
986	if (ptiTarget)
987	{
988	if (pttd->ptiMouseOver)
989	{
990	memcpy(ptiTarget, pttd->ptiMouseOver, sizeof(TOOLINFO));
991	return (MPARAM)TRUE;
992	}
993	}
994
995	return ((MPARAM)FALSE);
996	}
997
998	/*
999	*@@ TtmGetToolInfo:
1000	* implementation for TTM_GETTOOLINFO in ctl_fnwpTooltip.
1001	*
1002	*@@added V0.9.13 (2001-06-21) [umoeller]
1003	*/
1004
1005	MRESULT TtmGetToolInfo(HWND hwndTooltip, MPARAM mp2)
1006	{
1007	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
1008	PTOOLINFO ptiSearch = (PTOOLINFO)mp2;
1009	if (ptiSearch)
1010	{
1011	PLISTNODE pToolNode = lstQueryFirstNode(&pttd->llTools);
1012	while (pToolNode)
1013	{
1014	PTOOLINFO ptiThis = (PTOOLINFO)pToolNode->pItemData;
1015	if ( (ptiThis->hwndToolOwner == ptiSearch->hwndToolOwner)
1016	&& (ptiThis->hwndTool == ptiSearch->hwndTool)
1017	)
1018	{
1019	// found:
1020	memcpy(ptiSearch, ptiThis, sizeof(TOOLINFO));
1021	return (MPARAM)TRUE;
1022	}
1023	pToolNode = pToolNode->pNext;
1024	}
1025	}
1026
1027	return ((MPARAM)FALSE);
1028	}
1029
1030	/*
1031	*@@ FormatTooltip:
1032	* formats the tooltip window according to
1033	* its text (which is assumed to be in
1034	* pttd->pszPaintText) and positions it
1035	* on the screen.
1036	*
1037	* This does not change the visibility
1038	* of the tooltip; if it is not yet visible,
1039	* you must show it afterwards.
1040	*
1041	*@@added V0.9.13 (2001-06-21) [umoeller]
1042	*/
1043
1044	VOID FormatTooltip(HWND hwndTooltip,
1045	PTOOLTIPDATA pttd,
1046	PPOINTL pptlPointer) // in: current pointer pos or NULL
1047	{
1048	// find out how much space we need
1049	RECTL rcl = { 0, 0, 300, 1000 };
1050	POINTL ptlTooltip;
1051	LONG cx, cy;
1052	ULONG ulStyle = WinQueryWindowULong(hwndTooltip, QWL_STYLE);
1053
1054	HPS hps = WinGetPS(hwndTooltip);
1055
1056	winhDrawFormattedText(hps,
1057	&rcl,
1058	pttd->pszPaintText,
1059	DT_LEFT \| DT_TOP \| DT_WORDBREAK \| DT_QUERYEXTENT);
1060	WinReleasePS(hps);
1061
1062	// calc width and height of tooltip
1063	cx = rcl.xRight + 2*TOOLTIP_CX_BORDER;
1064	cy = (rcl.yTop - rcl.yBottom) + 2*TOOLTIP_CY_BORDER;
1065
1066	// calc x and y pos of tooltip:
1067
1068	// per default, use pointer pos
1069	ptlTooltip.x = pptlPointer->x - cx/2;
1070	ptlTooltip.y = pptlPointer->y - cy;
1071
1072	// do we need the tool's position?
1073	if ( pttd->ptiMouseOver->ulFlags
1074	& (TTF_CENTER_X_ON_TOOL \| TTF_POS_Y_ABOVE_TOOL \| TTF_POS_Y_BELOW_TOOL)
1075	)
1076	{
1077	// yes:
1078	SWP swpTool;
1079	POINTL ptlTool;
1080	WinQueryWindowPos(pttd->ptiMouseOver->hwndTool, &swpTool);
1081	ptlTool.x = swpTool.x;
1082	ptlTool.y = swpTool.y;
1083	// convert x, y to desktop points
1084	WinMapWindowPoints(WinQueryWindow(pttd->ptiMouseOver->hwndTool,
1085	QW_PARENT), // hwndFrom
1086	HWND_DESKTOP, // hwndTo
1087	&ptlTool,
1088	1);
1089
1090	// X
1091	if (pttd->ptiMouseOver->ulFlags & TTF_CENTER_X_ON_TOOL)
1092	// center X on tool:
1093	ptlTooltip.x = ptlTool.x + ((swpTool.cx - cx) / 2L);
1094
1095	// Y
1096	if (pttd->ptiMouseOver->ulFlags & TTF_POS_Y_ABOVE_TOOL)
1097	ptlTooltip.y = ptlTool.y + swpTool.cy;
1098	else if (pttd->ptiMouseOver->ulFlags & TTF_POS_Y_BELOW_TOOL)
1099	ptlTooltip.y = ptlTool.y - cy;
1100	}
1101
1102	// if "shy mouse" is enabled, make
1103	// sure the tool tip is not under the
1104	// mouse pointer
1105	if (ulStyle & TTF_SHYMOUSE)
1106	{
1107	// we need to subtract the current mouse
1108	// pointer's hot spot from the current
1109	// pointer position
1110	HPOINTER hptr = WinQueryPointer(HWND_DESKTOP);
1111	POINTERINFO pi;
1112	if (WinQueryPointerInfo(hptr, &pi))
1113	{
1114	// calc bottom edge of mouse pointer rect
1115	ULONG yBottomPointer = (pptlPointer->y - pi.yHotspot);
1116	// _Pmpf(("yHotspot: %d", pi.yHotspot));
1117	if ( (ptlTooltip.y + cy) // top edge of tool tip
1118	> yBottomPointer
1119	)
1120	{
1121	ptlTooltip.y = pptlPointer->y - cy - pi.yHotspot;
1122	}
1123	}
1124	}
1125
1126	// constrain to screen
1127	if (ptlTooltip.x < 0)
1128	ptlTooltip.x = 0;
1129	if (ptlTooltip.y < 0)
1130	ptlTooltip.y = 0;
1131	if (ptlTooltip.x + cx > pttd->cxScreen)
1132	ptlTooltip.x = pttd->cxScreen-cx;
1133	if (ptlTooltip.y + cy > pttd->cyScreen)
1134	ptlTooltip.y = pttd->cyScreen-cy;
1135
1136	// if shadow is enabled,
1137	// enlarge; the shadow might by
1138	// off-screen now, but that's OK
1139	if (ulStyle & TTS_SHADOW)
1140	{
1141	cx += TT_SHADOWOFS;
1142	cy += TT_SHADOWOFS;
1143	ptlTooltip.y -= TT_SHADOWOFS;
1144	}
1145
1146	// set tooltip position at the pos we calculated
1147	// and show tooltip
1148	WinSetWindowPos(hwndTooltip,
1149	HWND_TOP,
1150	ptlTooltip.x,
1151	ptlTooltip.y,
1152	cx,
1153	cy,
1154	SWP_MOVE \| SWP_SIZE \| SWP_ZORDER);
1155	}
1156
1157	/*
1158	*@@ TtmUpdateTipText:
1159	* implementation for TTM_UPDATETIPTEXT in ctl_fnwpTooltip.
1160	*
1161	*@@added V0.9.13 (2001-06-21) [umoeller]
1162	*/
1163
1164	VOID TtmUpdateTipText(HWND hwndTooltip,
1165	const char *pcszNewText)
1166	{
1167	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
1168
1169	// has text really changed?
1170	if ( ( (pttd->pszPaintText)
1171	&& (pcszNewText)
1172	&& (strcmp(pttd->pszPaintText, pcszNewText))
1173	)
1174	\|\| (pttd->pszPaintText && !pcszNewText)
1175	\|\| (!pttd->pszPaintText && pcszNewText)
1176	)
1177	{
1178	// yes:
1179	if (pttd->pszPaintText)
1180	{
1181	free(pttd->pszPaintText);
1182	pttd->pszPaintText = NULL;
1183	}
1184
1185	if (pcszNewText)
1186	pttd->pszPaintText = strdup(pcszNewText);
1187
1188	if (pttd->fIsVisible)
1189	{
1190	// currently showing:
1191	// reformat
1192	POINTL ptlPointer;
1193	WinQueryPointerPos(HWND_DESKTOP, &ptlPointer);
1194	FormatTooltip(hwndTooltip,
1195	pttd,
1196	&ptlPointer);
1197	WinInvalidateRect(hwndTooltip, NULL, FALSE);
1198	}
1199	}
1200	}
1201
1202	/*
1203	*@@ TtmShowTooltip:
1204	* implementation for TTM_SHOW_TOOLTIP.
1205	*
1206	* Depending on fShow, this shows or hides the
1207	* tool tip at the position specified by the
1208	* current tool or the mouse pointer (specified
1209	* by the tool's style flags).
1210	*
1211	*@@added V0.9.1 (2000-02-04) [umoeller]
1212	*/
1213
1214	VOID TtmShowTooltip(HWND hwndTooltip,
1215	BOOL fShow) // if TRUE: show, else: HIDE
1216	{
1217	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
1218	if (fShow)
1219	{
1220	/*
1221	* show tooltip::
1222	*
1223	*/
1224
1225	POINTL ptlPointer;
1226	// HPS hps;
1227
1228	// free old text
1229	if (pttd->pszPaintText)
1230	{
1231	free(pttd->pszPaintText);
1232	pttd->pszPaintText = NULL;
1233	}
1234
1235	WinQueryPointerPos(HWND_DESKTOP, &ptlPointer);
1236
1237	if ( (ptlPointer.x == pttd->ptlPointerLast.x)
1238	&& (ptlPointer.y == pttd->ptlPointerLast.y)
1239	)
1240	{
1241	// mouse not moved since timer was started:
1242	// find the current TOOLINFO
1243	if (pttd->ptiMouseOver)
1244	{
1245	TOOLINFO tiTemp;
1246	memcpy(&tiTemp, pttd->ptiMouseOver, sizeof(TOOLINFO));
1247	// get the text for the TOOLINFO
1248	WinSendMsg(hwndTooltip,
1249	TTM_GETTEXT,
1250	(MPARAM)0,
1251	(MPARAM)&tiTemp);
1252	if (tiTemp.pszText)
1253	pttd->pszPaintText = strdup(tiTemp.pszText);
1254	else
1255	pttd->pszPaintText = NULL;
1256	}
1257
1258	if (pttd->pszPaintText)
1259	{
1260	FormatTooltip(hwndTooltip,
1261	pttd,
1262	&ptlPointer);
1263
1264	// notify owner (TTN_SHOW)
1265	WinSendMsg(pttd->hwndOwner,
1266	WM_CONTROL,
1267	MPFROM2SHORT(pttd->usTooltipID, // tooltip control wnd ID
1268	TTN_SHOW),
1269	pttd->ptiMouseOver);
1270
1271	WinShowWindow(hwndTooltip, TRUE);
1272	pttd->fIsVisible = TRUE;
1273
1274	// start autopop timer
1275	pttd->idTimerAutopop = WinStartTimer(pttd->hab,
1276	hwndTooltip,
1277	TOOLTIP_ID_TIMER_AUTOPOP,
1278	pttd->ulTimeoutAutopop);
1279	} // end if (pttd->pszPaintText)
1280	} // end if ( (ptlPointer.x == pttd->ptlPointerLast.x)...
1281	} // end if (mp1)
1282	else
1283	{
1284	/*
1285	* hide tooltip::
1286	*
1287	*/
1288
1289	if (pttd->fIsVisible)
1290	{
1291	// notify owner (TTN_POP)
1292	WinSendMsg(pttd->hwndOwner,
1293	WM_CONTROL,
1294	MPFROM2SHORT(pttd->usTooltipID, // tooltip control wnd ID
1295	TTN_POP),
1296	pttd->ptiMouseOver);
1297	WinShowWindow(hwndTooltip, FALSE);
1298	}
1299
1300	// stop autopop timer
1301	if (pttd->idTimerAutopop)
1302	{
1303	WinStopTimer(pttd->hab,
1304	hwndTooltip,
1305	TOOLTIP_ID_TIMER_AUTOPOP);
1306	pttd->idTimerAutopop = 0;
1307	}
1308	}
1309
1310	// store new visibility
1311	pttd->fIsVisible = fShow;
1312	}
1313
1314	/*
1315	*@@ ctl_fnwpTooltip:
1316	* window procedure for the "tooltip" control. This control is
1317	* largely source-code compatible to the Win32 version and has
1318	* been modelled according to the Win32 programmer's reference.
1319	*
1320	* A tooltip control is a small pop-up window that displays a
1321	* single line of descriptive text giving the purpose of "tools"
1322	* in an application.
1323	* A "tool" is either a window, such as a child window or control,
1324	* or an application-defined rectangular area within a window.
1325	* See the TTM_ADDTOOL message for details.
1326	*
1327	* To clarify: There is usually one tooltip control, which is hidden
1328	* most of the time, for many "tools" (parts of a visible window).
1329	* When the user puts the cursor on a tool and leaves it there for
1330	* approximately one-half second, the tooltip control is set up for
1331	* that tool and made visible. The tooltip control appears near the
1332	* pointer and disappears when the user clicks a mouse button or moves
1333	* the pointer off of the tool.
1334	*
1335	* The Win32 concept has been extended with this implementation to
1336	* display even longer texts, including line breaks. The tooltip
1337	* window is formatted accordingly.
1338	*
1339	* All default window styles are ignored when you create the tooltip,
1340	* but will rather be set by this window proc automatically. The
1341	* only valid window styles are the TTS_* flags (see notes below).
1342	*
1343	* Presentation parameters are fully supported.
1344	*
1345	* To create a tooltip control using comctl.c, use
1346	+ ctlRegisterTooltip(hab);
1347	+ hwndTooltip = WinCreateWindow(HWND_DESKTOP, // parent
1348	+ COMCTL_TOOLTIP_CLASS, // wnd class (comctl.h)
1349	+ NULL, // window text
1350	+ TTS_ALWAYSTIP, // window style, ignored except for TTS_* flags
1351	+ 0, 0, 0, 0, // window pos and size, ignored
1352	+ hwndOwner, // owner window -- important!
1353	+ NULLHANDLE, // hwndInsertBehind, ignored
1354	+ ulID, // window ID, optional
1355	+ NULL, // control data
1356	+ NULL); // presparams
1357	+
1358	* ctl_fnwpTooltip automatically sets the size, position, and visibility
1359	* of the tooltip control. The size of the tooltip window will vary
1360	* depending on the text to be displayed and on the font presentation
1361	* parameters, which are supported by this control (OS/2 only).
1362	*
1363	* Note: OS/2 normally does not destroy windows which are only owned by
1364	* another window. As a result, when the tooltip's owner is destroyed,
1365	* you must explicitly also destroy the tooltip window.
1366	*
1367	* Under both Win32 and OS/2, a tooltip control has two class-specific styles:
1368	*
1369	* -- TTS_ALWAYSTIP: the tooltip appears when the cursor is on a tool,
1370	* regardless of whether the tooltip control's owner window is active
1371	* or inactive. Without this style, the tooltip control appears when the
1372	* tool's owner window is active, but not when it is inactive.
1373	*
1374	* -- TTS_NOPREFIX: this prevents the system from stripping the ampersand (&)
1375	* character from a string. If a tooltip control does not have the TTS_NOPREFIX
1376	* style, the system automatically strips ampersand characters, allowing an
1377	* application to use the same string as both a menu item and tooltip text.
1378	*
1379	* The tooltip control can be (de)activated using the TTM_ACTIVATE message.
1380	*
1381	* To register tools with the tooltip control (to make it do anything
1382	* meaningful), send the TTM_ADDTOOL message to the tooltip control.
1383	*
1384	* This control supports the following presentation parameters (if the
1385	* PP_* value is not found, the SYSCLR_* system color is used):
1386	* -- PP_MENUBACKGROUNDCOLOR / SYSCLR_ENTRYFIELD: tooltip background color.
1387	* -- PP_MENUFOREGROUNDCOLOR / SYSCLR_WINDOWTEXT: tooltip text color.
1388	* -- PP_MENUHILITEFGNDCOLOR / SYSCLR_WINDOWTEXT: 3D border light color.
1389	* -- PP_MENUHILITEBGNDCOLOR / SYSCLR_WINDOWTEXT: 3D border dark color.
1390	* -- PP_FONTNAMESIZE: font to use for the tooltip. The default is "8.Helv"
1391	* on Warp 3 and "9.WarpSans" on Warp 4.
1392	*
1393	* So per default, if no presentation parameters are set, the control
1394	* paints the background like an entry field and the text and the border
1395	* in the same window text color (usually black).
1396	* The tooltip does _not_ inherit presentation parameters from the parent,
1397	* so unless you explicitly set presparams, the tooltip looks pretty much
1398	* like the Win32 counterpart (with the default system colors, black border
1399	* and text on yellow background).
1400	*
1401	*@@added V0.9.0 [umoeller]
1402	*@@changed V0.9.12 (2001-04-28) [umoeller]: various fixes WRT subclassing
1403	*/
1404
1405	MRESULT EXPENTRY ctl_fnwpTooltip(HWND hwndTooltip, ULONG msg, MPARAM mp1, MPARAM mp2)
1406	{
1407	MRESULT mrc = 0;
1408
1409	TRY_LOUD(excpt1)
1410	{
1411	switch (msg)
1412	{
1413	/*
1414	* WM_CREATE:
1415	* this message is sent to the window procedure of
1416	* the window being created, thus offering it an
1417	* opportunity to initialize that window.
1418	*
1419	* The window procedure receives this after the window
1420	* is created but before the window becomes visible.
1421	*/
1422
1423	case WM_CREATE:
1424	mrc = TtmCreate(hwndTooltip, mp2);
1425	break;
1426
1427	/*
1428	* WM_HITTEST:
1429	* since we have the CS_HITTEST class style set,
1430	* we get this message. We return HT_TRANSPARENT
1431	* always so the tooltip does not block mouse clicks
1432	* for the windows which lie below.
1433	*/
1434
1435	case WM_HITTEST: // done
1436	mrc = (MPARAM)HT_TRANSPARENT;
1437	break;
1438
1439	/*
1440	* WM_TIMER:
1441	* posted when either the "initial" timer
1442	* or the "autopop" timer times out.
1443	* We'll show or hide the tooltip then.
1444	*/
1445
1446	case WM_TIMER: // done
1447	if (!TtmTimer(hwndTooltip, mp1))
1448	mrc = WinDefWindowProc(hwndTooltip, msg, mp1, mp2);
1449	break;
1450
1451	/*
1452	* WM_PAINT:
1453	*
1454	*/
1455
1456	case WM_PAINT: // done
1457	TtmPaint(hwndTooltip);
1458	break;
1459
1460	/*
1461	* WM_PRESPARAMCHANGED:
1462	* presentation parameter has changed.
1463	*/
1464
1465	case WM_PRESPARAMCHANGED:
1466	{
1467	LONG lPPIndex = (LONG)mp1;
1468	switch (lPPIndex)
1469	{
1470	case 0: // layout palette thing dropped
1471	case PP_MENUBACKGROUNDCOLOR:
1472	case PP_MENUFOREGROUNDCOLOR:
1473	case PP_MENUHILITEFGNDCOLOR:
1474	case PP_MENUHILITEBGNDCOLOR:
1475	// re-query our presparams
1476	UpdateTooltipPresColors(hwndTooltip);
1477	}
1478	break; }
1479
1480	/*
1481	* WM_SYSCOLORCHANGE:
1482	* system color has changed.
1483	*/
1484
1485	case WM_SYSCOLORCHANGE:
1486	UpdateTooltipPresColors(hwndTooltip);
1487	break;
1488
1489	/*
1490	* WM_DESTROY:
1491	* clean up upon destruction.
1492	*/
1493
1494	case WM_DESTROY:
1495	TtmDestroy(hwndTooltip);
1496	break;
1497
1498	/*
1499	*@@ TTM_ACTIVATE:
1500	* activates or deactives the tooltip control.
1501	*
1502	* Parameters:
1503	* -- BOOL mp1: if TRUE, activate, if FALSE, deactivate.
1504	* -- mp2: always 0.
1505	*
1506	* Return value: 0 always.
1507	*/
1508
1509	case TTM_ACTIVATE: // done
1510	{
1511	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
1512	if (!(pttd->fIsActive = (BOOL)mp1))
1513	// disable: hide tooltip
1514	WinPostMsg(hwndTooltip, TTM_SHOWTOOLTIPNOW, (MPARAM)FALSE, 0);
1515	}
1516	break;
1517
1518	/*
1519	*@@ TTM_ADDTOOL:
1520	* registers a tool with a tooltip control.
1521	*
1522	* Parameters:
1523	* -- mp1: always 0.
1524	* -- PTOOLINFO mp2: information about the tool.
1525	*
1526	* Return value: TRUE if successful or FALSE otherwise.
1527	*
1528	* A tooltip control can support any number of tools. To
1529	* support a particular tool, you must register the tool
1530	* with the tooltip control by sending the TTM_ADDTOOL
1531	* message to the tooltip control. The message includes
1532	* the address of a TOOLINFO structure, which provides
1533	* information the tooltip control needs to display text
1534	* for the tool.
1535	*
1536	* A tooltip control supports tools implemented as windows
1537	* (such as child windows or control windows) and as
1538	* rectangular areas within a window's client area.
1539	*
1540	* -- When you add a tool implemented as a rectangular
1541	* area, the "hwndToolOwner" member of TOOLINFO must
1542	* specify the handle of the window that contains the
1543	* area, and the "rect" member must specify the client
1544	* coordinates of the area's bounding rectangle.
1545	*
1546	* -- When you add a tool implemented as a window, the
1547	* "hwndTool" member of TOOLINFO must contain the
1548	* window handle of the tool. hwndToolOwner should be
1549	* the owner of the tool.
1550	*
1551	* When you add a tool to a tooltip control, the "pszText"
1552	* member of the TOOLINFO structure must specify the string
1553	* to display for the tool. You can change the text any time
1554	* after adding the tool by using the TTM_UPDATETIPTEXT message.
1555	*
1556	* If you specify the PSZ_TEXTCALLBACK value in the pszText
1557	* member, whenever the tooltip control needs the text for the
1558	* tool, it sends a WM_CONTROL message to hwndToolOwner with
1559	* the TTN_NEEDTEXT notification code.
1560	*
1561	* The message includes the address of a TOOLTIPTEXT structure,
1562	* which contains the window handle of the tool. You can then
1563	* fill the TOOLTIPTEXT structure with the tool text.
1564	*
1565	* To retrieve the text for a tool, use the TTM_GETTEXT message.
1566	*
1567	*@@todo: add tool rectangles
1568	*/
1569
1570	case TTM_ADDTOOL: // done
1571	mrc = TtmAddTool(hwndTooltip, mp2);
1572	break;
1573
1574	/*
1575	*@@ TTM_DELTOOL:
1576	* removes a tool from a tooltip control.
1577	*
1578	* Parameters:
1579	* -- mp1: always 0.
1580	* -- PTOOLINFO mp2: information about the tool;
1581	* all fields except cbSize, hwndToolOwner,
1582	* and hwndTool are ignored.
1583	*
1584	* Return value: 0 always.
1585	*/
1586
1587	case TTM_DELTOOL: // done
1588	TtmDelTool(hwndTooltip, mp2);
1589	break;
1590
1591	/*
1592	*@@ TTM_NEWTOOLRECT:
1593	* sets a new bounding rectangle for a tool
1594	* already registered with a tooltip control.
1595	*
1596	* Parameters:
1597	* -- mp1: always 0.
1598	* -- PTOOLINFO mp2: information about the tool;
1599	* all fields except hwnd, uID, and rect
1600	* are ignored.
1601	*
1602	* Return value: 0 always.
1603	*
1604	* If an application includes a tool implemented as a rectangular
1605	* area and the size or position of the control changes, it can
1606	* use the TTM_NEWTOOLRECT message to report the change to the
1607	* tooltip control. An application does not need to report size
1608	* and position changes for a tool implemented as a window.
1609	* Reporting that is not necessary because the tooltip control
1610	* uses the window handle of a tool to determine if the cursor
1611	* is on the tool, not the tool's bounding rectangle.
1612	*/
1613
1614	case TTM_NEWTOOLRECT:
1615
1616	break;
1617
1618	/*
1619	*@@ TTM_RELAYEVENT:
1620	* passes a mouse message to a tooltip control
1621	* for further processing.
1622	*
1623	* Parameters:
1624	* -- mp1: always 0.
1625	* -- PQMSG mp2: pointer to a QMSG struct (Win95: MSG struct)
1626	* containing a mouse message. Only the above messages
1627	* are processed.
1628	*
1629	* Return value: 0 always.
1630	*
1631	* A tooltip control needs to receive mouse messages to determine
1632	* when to display the tooltip window. Because mouse messages are
1633	* sent only to the window that contains the cursor, you must
1634	* use the TTM_RELAYEVENT message to relay mouse messages to the
1635	* tooltip control.
1636	*
1637	* If a tool is implemented as a rectangular area in an
1638	* application-defined window, the window procedure receives all
1639	* mouse messages and can relay the ones listed below to the
1640	* tooltip control, using this message.
1641	*
1642	* However, if a tool is implemented as a system-defined window,
1643	* the mouse messages are sent to that window and are not readily
1644	* available to the application. There are two ways you can have
1645	* the tooltip control notified of these mouse messages:
1646	*
1647	* -- You can specify the TTF_SUBCLASS flag when adding the tool
1648	* to the tooltip control. The tooltip control will then subclass
1649	* the tool window to get mouse-related messages, and you're off.
1650	*
1651	* -- You can implement a message hook for your process and check
1652	* for your tool windows there and send TTM_RELAYEVENT to the
1653	* tooltip control. In that case, you need to intercept the
1654	* messages specified below.
1655	*
1656	* When a tooltip control receives a relayed WM_MOUSEMOVE message,
1657	* it determines whether the cursor is in the bounding rectangle of
1658	* a tool. If the cursor is there, the tooltip control sets a timer.
1659	* At the end of the time-out duration, the tooltip control checks
1660	* the position of the cursor to see whether it has moved. If the
1661	* cursor has not, the tooltip control retrieves the text for the tool,
1662	* copies the text into the tooltip window, and shows the window.
1663	* The tooltip control continues to show the window until it receives
1664	* a relayed button-up or button-down message or until a relayed
1665	* WM_MOUSEMOVE message indicates that the cursor has moved outside
1666	* the bounding rectangle of the tool.
1667	*
1668	* For the timer descriptions, see TTM_SETDELAYTIME.
1669	*
1670	* When it is about to be displayed, a tootip control sends the
1671	* TTN_SHOW notification to the owner window. A tooltip control
1672	* sends the TTN_POP notification when it is about to be hidden.
1673	* Each notification is sent in the context of a WM_NOTIFY message
1674	* (OS/2: WM_CONTROL).
1675	*
1676	* Relevant messages:
1677	* -- WM_MOUSEMOVE
1678	* -- WM_BUTTON1DOWN (Win95: WM_LBUTTONDOWN)
1679	* -- WM_BUTTON1UP (Win95: WM_LBUTTONUP)
1680	* -- WM_BUTTON2DOWN (Win95: WM_RBUTTONDOWN)
1681	* -- WM_BUTTON2UP (Win95: WM_RBUTTONUP)
1682	* -- WM_BUTTON3DOWN (Win95: WM_MBUTTONDOWN)
1683	* -- WM_BUTTON3UP (Win95: WM_MBUTTONUP)
1684	*/
1685
1686	case TTM_RELAYEVENT:
1687	TtmRelayEvent(hwndTooltip, mp2);
1688	break;
1689
1690	/*
1691	*@@ TTM_GETDELAYTIME:
1692	* returns the current value of the specified
1693	* timeout value. See TTM_SETDELAYTIME.
1694	*
1695	* Parameters:
1696	*
1697	* -- USHORT mp1: timer value to query. One of:
1698	* -- TTDT_AUTOPOP
1699	* -- TTDT_INITIAL
1700	* -- TTDT_RESHOW
1701	*
1702	* Returns: ULONG timeout value.
1703	*
1704	*@@added V0.9.12 (2001-04-28) [umoeller]
1705	*/
1706
1707	case TTM_GETDELAYTIME:
1708	mrc = TtmGetDelayTime(hwndTooltip, mp1);
1709	break;
1710
1711	/*
1712	*@@ TTM_SETDELAYTIME:
1713	* overrides a few default timeout values for the
1714	* tooltip control.
1715	*
1716	* A tooltip control actually has three time-out durations
1717	* associated with it. The initial duration is the length
1718	* of time that the cursor must remain stationary within
1719	* the bounding rectangle of a tool before the tooltip window
1720	* is displayed. The reshow duration is the length of the delay
1721	* before subsequent tooltip windows are displayed when the
1722	* cursor moves from one tool to another. The autopopup duration
1723	* is the length of time that the tooltip window remains
1724	* displayed before it is hidden. That is, if the cursor remains
1725	* stationary within the bounding rectangle after the tooltip
1726	* window is displayed, the tooltip window is automatically
1727	* hidden at the end of the autopopup duration.
1728	*
1729	* You can adjust all of the time-out durations by using this
1730	* message.
1731	*
1732	* Parameters:
1733	* -- USHORT mp1: parameter selection. One of the following:
1734	* -- TTDT_AUTOMATIC: automatically calculates the initial,
1735	* reshow, and autopopup durations based on the value of mp2.
1736	* -- TTDT_AUTOPOP: sets the length of time before the tooltip
1737	* window is hidden if the cursor remains stationary
1738	* in the tool's bounding rectangle after the tooltip window
1739	* has appeared.
1740	* -- TTDT_INITIAL: sets the length of time that the cursor must
1741	* remain stationary within the bounding rectangle of
1742	* a tool before the tooltip window is displayed.
1743	* -- TTDT_RESHOW: sets the length of the delay before subsequent
1744	* tooltip windows are displayed when the cursor is moved
1745	* from one tool to another.
1746	* -- ULONG mp2: new duration, in milliseconds.
1747	*
1748	* Return value: 0 always.
1749	*/
1750
1751	case TTM_SETDELAYTIME: // done
1752	TtmSetDelayTime(hwndTooltip, mp1, mp2);
1753	break;
1754
1755	/*
1756	*@@ TTM_GETTEXT:
1757	* retrieves the text for a tool in the tooltip control.
1758	*
1759	* Parameters:
1760	* -- mp1: always 0
1761	* -- PTOOLINFO mp2: pointer to a TOOLINFO structure.
1762	* hwndTool identifies a tool. If the tooltip control
1763	* includes the tool, the pszText member receives
1764	* the pointer to the string on output.
1765	*
1766	* Return value: 0 always.
1767	*
1768	* Additional note: On input, if TOOLINFO.lpszText == PSZ_TEXTCALLBACK,
1769	* this sends the TTN_NEEDTEXT notification to TOOLINFO.hwnd.
1770	*
1771	*/
1772
1773	case TTM_GETTEXT: // done, I think
1774	TtmGetText(hwndTooltip, mp2);
1775	break;
1776
1777	/*
1778	*@@ TTM_UPDATETIPTEXT:
1779	* sets the current tooltip text explicitly,
1780	* no matter for what tool the tooltip is
1781	* currently being displayed. This might be
1782	* useful if you want to dynamically update
1783	* the tooltip display.
1784	*
1785	* If the tooltip is currently showing,
1786	* it is reformatted with the new text.
1787	*
1788	* Note that the change is not permanent;
1789	* if the mouse moves over a different
1790	* tool next, the change will be lost.
1791	*
1792	* Parameters:
1793	* -- PSZ mp1: new text to display.
1794	*
1795	*@@added V0.9.13 (2001-06-21) [umoeller]
1796	*/
1797
1798	case TTM_UPDATETIPTEXT:
1799	TtmUpdateTipText(hwndTooltip, (PSZ)mp1);
1800	break;
1801
1802	/*
1803	*@@ TTM_HITTEST:
1804	* tests a point to determine whether it is within the
1805	* bounding rectangle of the specified tool and, if the
1806	* point is within, retrieves information about the tool.
1807	*
1808	* Parameters:
1809	* -- mp1: always 0.
1810	* -- PHITTESTINFO mp2: pointer to a TTHITTESTINFO structure.
1811	* When sending the message, the "hwnd" member must specify
1812	* the handle of a tool and the "pt" member must specify the
1813	* coordinates of a point. If the return value is TRUE, the
1814	* "ti" member receives information about the tool that
1815	* occupies the point.
1816	*
1817	* Return value: returns TRUE if the tool occupies the specified
1818	* point or FALSE otherwise.
1819	*/
1820
1821	case TTM_HITTEST:
1822	break;
1823
1824	/*
1825	*@@ TTM_WINDOWFROMPOINT:
1826	* this message allows a subclass procedure to cause a tooltip
1827	* to display text for a window other than the one beneath the
1828	* mouse cursor.
1829	*
1830	* Parameters:
1831	* -- mp1: always 0.
1832	* -- mp2: PPOINTL lppt (Win95: (POINT FAR *)lppt):
1833	* pointer to a POINTL structure that defines the point to be checked.
1834	*
1835	* Return value: the handle to the window that contains the point, or
1836	* NULL if no window exists at the specified point.
1837	*
1838	* This message is intended to be processed by an application that
1839	* subclasses a tooltip. It is not intended to be sent by an
1840	* application. A tooltip sends this message to itself before
1841	* displaying the text for a window. By changing the coordinates
1842	* of the point specified by lppt, the subclass procedure can cause
1843	* the tooltip to display text for a window other than the one
1844	* beneath the mouse cursor.
1845	*/
1846
1847	case TTM_WINDOWFROMPOINT:
1848	break;
1849
1850	/*
1851	*@@ TTM_ENUMTOOLS:
1852	* this message retrieves the information that a tooltip control
1853	* maintains about a certain tool.
1854	*
1855	* Parameters:
1856	* -- USHORT mp1: zero-based index of the tool for which to
1857	* retrieve information.
1858	* -- PTOOLINFO mp2: pointer to a TOOLINFO structure that
1859	* receives information about the tool. Before sending
1860	* this message, the cbSize member must specify the size
1861	* of the structure.
1862	*
1863	* Return value: TRUE if any tools are enumerated or FALSE otherwise.
1864	*/
1865
1866	case TTM_ENUMTOOLS: // done
1867	mrc = TtmEnumTools(hwndTooltip, mp1, mp2);
1868	break;
1869
1870	/*
1871	*@@ TTM_GETCURRENTTOOL:
1872	* this message retrieves the information that the
1873	* tooltip control maintains for the _current_ tool;
1874	* that is, the one for which the tooltip control
1875	* is currently displaying text.
1876	*
1877	* Parameters:
1878	* -- mp1: always 0.
1879	* -- PTOOLINFO mp2: pointer to a TOOLINFO structure that receives
1880	* information about the current tool.
1881	*
1882	* Return value: TRUE if successful or FALSE otherwise.
1883	*/
1884
1885	case TTM_GETCURRENTTOOL: // done
1886	mrc = TtmGetCurrentTool(hwndTooltip, mp2);
1887	break;
1888
1889	/*
1890	*@@ TTM_GETTOOLCOUNT:
1891	* returns the number of tools in the tooltip control.
1892	*
1893	* No parameters.
1894	*/
1895
1896	case TTM_GETTOOLCOUNT: // done
1897	{
1898	PTOOLTIPDATA pttd = (PTOOLTIPDATA)WinQueryWindowPtr(hwndTooltip, 1);
1899	mrc = (MPARAM)lstCountItems(&pttd->llTools);
1900	break; }
1901
1902	/*
1903	*@@ TTM_GETTOOLINFO:
1904	* this message retrieves the information that a tooltip
1905	* control maintains about a tool.
1906	*
1907	* Parameters:
1908	* -- mp1: always 0.
1909	* -- PTOOLINFO mp2:
1910	* pointer to a TOOLINFO structure. When sending the message,
1911	* the hwnd and uId members identify a tool, and the cbSize
1912	* member must specify the size of the structure. If the
1913	* tooltip control includes the tool, the structure receives
1914	* information about the tool.
1915	*
1916	* Return value: TRUE if successful or FALSE otherwise.
1917	*/
1918
1919	case TTM_GETTOOLINFO: // done
1920	mrc = TtmGetToolInfo(hwndTooltip, mp2);
1921	break;
1922
1923	/*
1924	*@@ TTM_SETTOOLINFO:
1925	* this message sets the information that a tooltip control
1926	* maintains for a tool.
1927	*
1928	* Parameters:
1929	* -- mp1: always 0.
1930	* -- PTOOLINFO mp2: pointer to a TOOLINFO structure that
1931	* specifies the information to set.
1932	*
1933	* Return value: 0 always.
1934	*/
1935
1936	case TTM_SETTOOLINFO:
1937	break;
1938
1939	/*
1940	*@@ TTM_SHOWTOOLTIPNOW:
1941	* depending on BOOL mp1, shows or hides the tooltip.
1942	* This is required because we cannot show or hide
1943	* the window during processing of WM_MOUSEMOVE etc,
1944	* which will lead to strange PM hangs.
1945	*
1946	* This is not part of the Win95 message set but used
1947	* in the OS/2 implementation only. This calls
1948	* TtmShowTooltip in turn.
1949	*/
1950
1951	case TTM_SHOWTOOLTIPNOW:
1952	TtmShowTooltip(hwndTooltip, (BOOL)mp1);
1953	break;
1954
1955	default:
1956	mrc = WinDefWindowProc(hwndTooltip, msg, mp1, mp2);
1957	}
1958	}
1959	CATCH(excpt1) {} END_CATCH();
1960
1961	return (mrc);
1962	}
1963
1964

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