]>
Commit | Line | Data |
---|---|---|
1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: generic/scrolwin.cpp | |
3 | // Purpose: wxGenericScrolledWindow implementation | |
4 | // Author: Julian Smart | |
5 | // Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement. | |
6 | // Ron Lee on 10.4.02: virtual size / auto scrollbars et al. | |
7 | // Created: 01/02/97 | |
8 | // RCS-ID: $Id$ | |
9 | // Copyright: (c) wxWidgets team | |
10 | // Licence: wxWindows licence | |
11 | ///////////////////////////////////////////////////////////////////////////// | |
12 | ||
13 | // ============================================================================ | |
14 | // declarations | |
15 | // ============================================================================ | |
16 | ||
17 | // ---------------------------------------------------------------------------- | |
18 | // headers | |
19 | // ---------------------------------------------------------------------------- | |
20 | ||
21 | #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) | |
22 | #pragma implementation "genscrolwin.h" | |
23 | #endif | |
24 | ||
25 | #ifdef __VMS | |
26 | #define XtDisplay XTDISPLAY | |
27 | #endif | |
28 | ||
29 | // For compilers that support precompilation, includes "wx.h". | |
30 | #include "wx/wxprec.h" | |
31 | ||
32 | #ifdef __BORLANDC__ | |
33 | #pragma hdrstop | |
34 | #endif | |
35 | ||
36 | #if !defined(__WXGTK__) || defined(__WXUNIVERSAL__) | |
37 | ||
38 | #include "wx/utils.h" | |
39 | #include "wx/dcclient.h" | |
40 | ||
41 | #include "wx/scrolwin.h" | |
42 | #include "wx/panel.h" | |
43 | #if wxUSE_TIMER | |
44 | #include "wx/timer.h" | |
45 | #endif | |
46 | #include "wx/sizer.h" | |
47 | #include "wx/recguard.h" | |
48 | ||
49 | #ifdef __WXMSW__ | |
50 | #include <windows.h> // for DLGC_WANTARROWS | |
51 | #endif | |
52 | ||
53 | #ifdef __WXMOTIF__ | |
54 | // For wxRETAINED implementation | |
55 | #ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++ | |
56 | //This code switches off the compiler warnings | |
57 | # pragma message disable nosimpint | |
58 | #endif | |
59 | #include <Xm/Xm.h> | |
60 | #ifdef __VMS__ | |
61 | # pragma message enable nosimpint | |
62 | #endif | |
63 | #endif | |
64 | ||
65 | IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow) | |
66 | ||
67 | /* | |
68 | TODO PROPERTIES | |
69 | style wxHSCROLL | wxVSCROLL | |
70 | */ | |
71 | ||
72 | // ---------------------------------------------------------------------------- | |
73 | // wxScrollHelperEvtHandler: intercept the events from the window and forward | |
74 | // them to wxScrollHelper | |
75 | // ---------------------------------------------------------------------------- | |
76 | ||
77 | class WXDLLEXPORT wxScrollHelperEvtHandler : public wxEvtHandler | |
78 | { | |
79 | public: | |
80 | wxScrollHelperEvtHandler(wxScrollHelper *scrollHelper) | |
81 | { | |
82 | m_scrollHelper = scrollHelper; | |
83 | } | |
84 | ||
85 | virtual bool ProcessEvent(wxEvent& event); | |
86 | ||
87 | void ResetDrawnFlag() { m_hasDrawnWindow = false; } | |
88 | ||
89 | private: | |
90 | wxScrollHelper *m_scrollHelper; | |
91 | ||
92 | bool m_hasDrawnWindow; | |
93 | ||
94 | DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler) | |
95 | }; | |
96 | ||
97 | #if wxUSE_TIMER | |
98 | // ---------------------------------------------------------------------------- | |
99 | // wxAutoScrollTimer: the timer used to generate a stream of scroll events when | |
100 | // a captured mouse is held outside the window | |
101 | // ---------------------------------------------------------------------------- | |
102 | ||
103 | class wxAutoScrollTimer : public wxTimer | |
104 | { | |
105 | public: | |
106 | wxAutoScrollTimer(wxWindow *winToScroll, wxScrollHelper *scroll, | |
107 | wxEventType eventTypeToSend, | |
108 | int pos, int orient); | |
109 | ||
110 | virtual void Notify(); | |
111 | ||
112 | private: | |
113 | wxWindow *m_win; | |
114 | wxScrollHelper *m_scrollHelper; | |
115 | wxEventType m_eventType; | |
116 | int m_pos, | |
117 | m_orient; | |
118 | ||
119 | DECLARE_NO_COPY_CLASS(wxAutoScrollTimer) | |
120 | }; | |
121 | ||
122 | // ============================================================================ | |
123 | // implementation | |
124 | // ============================================================================ | |
125 | ||
126 | // ---------------------------------------------------------------------------- | |
127 | // wxAutoScrollTimer | |
128 | // ---------------------------------------------------------------------------- | |
129 | ||
130 | wxAutoScrollTimer::wxAutoScrollTimer(wxWindow *winToScroll, | |
131 | wxScrollHelper *scroll, | |
132 | wxEventType eventTypeToSend, | |
133 | int pos, int orient) | |
134 | { | |
135 | m_win = winToScroll; | |
136 | m_scrollHelper = scroll; | |
137 | m_eventType = eventTypeToSend; | |
138 | m_pos = pos; | |
139 | m_orient = orient; | |
140 | } | |
141 | ||
142 | void wxAutoScrollTimer::Notify() | |
143 | { | |
144 | // only do all this as long as the window is capturing the mouse | |
145 | if ( wxWindow::GetCapture() != m_win ) | |
146 | { | |
147 | Stop(); | |
148 | } | |
149 | else // we still capture the mouse, continue generating events | |
150 | { | |
151 | // first scroll the window if we are allowed to do it | |
152 | wxScrollWinEvent event1(m_eventType, m_pos, m_orient); | |
153 | event1.SetEventObject(m_win); | |
154 | if ( m_scrollHelper->SendAutoScrollEvents(event1) && | |
155 | m_win->GetEventHandler()->ProcessEvent(event1) ) | |
156 | { | |
157 | // and then send a pseudo mouse-move event to refresh the selection | |
158 | wxMouseEvent event2(wxEVT_MOTION); | |
159 | wxGetMousePosition(&event2.m_x, &event2.m_y); | |
160 | ||
161 | // the mouse event coordinates should be client, not screen as | |
162 | // returned by wxGetMousePosition | |
163 | wxWindow *parentTop = m_win; | |
164 | while ( parentTop->GetParent() ) | |
165 | parentTop = parentTop->GetParent(); | |
166 | wxPoint ptOrig = parentTop->GetPosition(); | |
167 | event2.m_x -= ptOrig.x; | |
168 | event2.m_y -= ptOrig.y; | |
169 | ||
170 | event2.SetEventObject(m_win); | |
171 | ||
172 | // FIXME: we don't fill in the other members - ok? | |
173 | ||
174 | m_win->GetEventHandler()->ProcessEvent(event2); | |
175 | } | |
176 | else // can't scroll further, stop | |
177 | { | |
178 | Stop(); | |
179 | } | |
180 | } | |
181 | } | |
182 | #endif | |
183 | ||
184 | // ---------------------------------------------------------------------------- | |
185 | // wxScrollHelperEvtHandler | |
186 | // ---------------------------------------------------------------------------- | |
187 | ||
188 | bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event) | |
189 | { | |
190 | wxEventType evType = event.GetEventType(); | |
191 | ||
192 | // the explanation of wxEVT_PAINT processing hack: for historic reasons | |
193 | // there are 2 ways to process this event in classes deriving from | |
194 | // wxScrolledWindow. The user code may | |
195 | // | |
196 | // 1. override wxScrolledWindow::OnDraw(dc) | |
197 | // 2. define its own OnPaint() handler | |
198 | // | |
199 | // In addition, in wxUniversal wxWindow defines OnPaint() itself and | |
200 | // always processes the draw event, so we can't just try the window | |
201 | // OnPaint() first and call our HandleOnPaint() if it doesn't process it | |
202 | // (the latter would never be called in wxUniversal). | |
203 | // | |
204 | // So the solution is to have a flag telling us whether the user code drew | |
205 | // anything in the window. We set it to true here but reset it to false in | |
206 | // wxScrolledWindow::OnPaint() handler (which wouldn't be called if the | |
207 | // user code defined OnPaint() in the derived class) | |
208 | m_hasDrawnWindow = true; | |
209 | ||
210 | // pass it on to the real handler | |
211 | bool processed = wxEvtHandler::ProcessEvent(event); | |
212 | ||
213 | // always process the size events ourselves, even if the user code handles | |
214 | // them as well, as we need to AdjustScrollbars() | |
215 | // | |
216 | // NB: it is important to do it after processing the event in the normal | |
217 | // way as HandleOnSize() may generate a wxEVT_SIZE itself if the | |
218 | // scrollbar[s] (dis)appear and it should be seen by the user code | |
219 | // after this one | |
220 | if ( evType == wxEVT_SIZE ) | |
221 | { | |
222 | m_scrollHelper->HandleOnSize((wxSizeEvent &)event); | |
223 | ||
224 | return true; | |
225 | } | |
226 | ||
227 | if ( processed ) | |
228 | { | |
229 | // normally, nothing more to do here - except if it was a paint event | |
230 | // which wasn't really processed, then we'll try to call our | |
231 | // OnDraw() below (from HandleOnPaint) | |
232 | if ( m_hasDrawnWindow ) | |
233 | { | |
234 | return true; | |
235 | } | |
236 | } | |
237 | ||
238 | // reset the skipped flag to false as it might have been set to true in | |
239 | // ProcessEvent() above | |
240 | event.Skip(false); | |
241 | ||
242 | if ( evType == wxEVT_PAINT ) | |
243 | { | |
244 | m_scrollHelper->HandleOnPaint((wxPaintEvent &)event); | |
245 | return true; | |
246 | } | |
247 | ||
248 | if ( evType == wxEVT_SCROLLWIN_TOP || | |
249 | evType == wxEVT_SCROLLWIN_BOTTOM || | |
250 | evType == wxEVT_SCROLLWIN_LINEUP || | |
251 | evType == wxEVT_SCROLLWIN_LINEDOWN || | |
252 | evType == wxEVT_SCROLLWIN_PAGEUP || | |
253 | evType == wxEVT_SCROLLWIN_PAGEDOWN || | |
254 | evType == wxEVT_SCROLLWIN_THUMBTRACK || | |
255 | evType == wxEVT_SCROLLWIN_THUMBRELEASE ) | |
256 | { | |
257 | m_scrollHelper->HandleOnScroll((wxScrollWinEvent &)event); | |
258 | return !event.GetSkipped(); | |
259 | } | |
260 | ||
261 | if ( evType == wxEVT_ENTER_WINDOW ) | |
262 | { | |
263 | m_scrollHelper->HandleOnMouseEnter((wxMouseEvent &)event); | |
264 | } | |
265 | else if ( evType == wxEVT_LEAVE_WINDOW ) | |
266 | { | |
267 | m_scrollHelper->HandleOnMouseLeave((wxMouseEvent &)event); | |
268 | } | |
269 | #if wxUSE_MOUSEWHEEL | |
270 | else if ( evType == wxEVT_MOUSEWHEEL ) | |
271 | { | |
272 | m_scrollHelper->HandleOnMouseWheel((wxMouseEvent &)event); | |
273 | } | |
274 | #endif // wxUSE_MOUSEWHEEL | |
275 | else if ( evType == wxEVT_CHAR ) | |
276 | { | |
277 | m_scrollHelper->HandleOnChar((wxKeyEvent &)event); | |
278 | return !event.GetSkipped(); | |
279 | } | |
280 | ||
281 | return false; | |
282 | } | |
283 | ||
284 | // ---------------------------------------------------------------------------- | |
285 | // wxScrollHelper construction | |
286 | // ---------------------------------------------------------------------------- | |
287 | ||
288 | wxScrollHelper::wxScrollHelper(wxWindow *win) | |
289 | { | |
290 | m_xScrollPixelsPerLine = | |
291 | m_yScrollPixelsPerLine = | |
292 | m_xScrollPosition = | |
293 | m_yScrollPosition = | |
294 | m_xScrollLines = | |
295 | m_yScrollLines = | |
296 | m_xScrollLinesPerPage = | |
297 | m_yScrollLinesPerPage = 0; | |
298 | ||
299 | m_xScrollingEnabled = | |
300 | m_yScrollingEnabled = true; | |
301 | ||
302 | m_scaleX = | |
303 | m_scaleY = 1.0; | |
304 | #if wxUSE_MOUSEWHEEL | |
305 | m_wheelRotation = 0; | |
306 | #endif | |
307 | ||
308 | m_win = | |
309 | m_targetWindow = (wxWindow *)NULL; | |
310 | ||
311 | m_timerAutoScroll = (wxTimer *)NULL; | |
312 | ||
313 | m_handler = NULL; | |
314 | ||
315 | if ( win ) | |
316 | SetWindow(win); | |
317 | } | |
318 | ||
319 | wxScrollHelper::~wxScrollHelper() | |
320 | { | |
321 | StopAutoScrolling(); | |
322 | ||
323 | DeleteEvtHandler(); | |
324 | } | |
325 | ||
326 | // ---------------------------------------------------------------------------- | |
327 | // setting scrolling parameters | |
328 | // ---------------------------------------------------------------------------- | |
329 | ||
330 | void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, | |
331 | int pixelsPerUnitY, | |
332 | int noUnitsX, | |
333 | int noUnitsY, | |
334 | int xPos, | |
335 | int yPos, | |
336 | bool noRefresh) | |
337 | { | |
338 | int xpos, ypos; | |
339 | ||
340 | CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos); | |
341 | bool do_refresh = | |
342 | ( | |
343 | (noUnitsX != 0 && m_xScrollLines == 0) || | |
344 | (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX * noUnitsX) || | |
345 | ||
346 | (noUnitsY != 0 && m_yScrollLines == 0) || | |
347 | (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY * noUnitsY) || | |
348 | (xPos != m_xScrollPosition) || | |
349 | (yPos != m_yScrollPosition) | |
350 | ); | |
351 | ||
352 | m_xScrollPixelsPerLine = pixelsPerUnitX; | |
353 | m_yScrollPixelsPerLine = pixelsPerUnitY; | |
354 | m_xScrollPosition = xPos; | |
355 | m_yScrollPosition = yPos; | |
356 | ||
357 | int w = noUnitsX * pixelsPerUnitX; | |
358 | int h = noUnitsY * pixelsPerUnitY; | |
359 | ||
360 | // For better backward compatibility we set persisting limits | |
361 | // here not just the size. It makes SetScrollbars 'sticky' | |
362 | // emulating the old non-autoscroll behaviour. | |
363 | ||
364 | m_targetWindow->SetVirtualSizeHints( w, h ); | |
365 | ||
366 | // The above should arguably be deprecated, this however we still need. | |
367 | ||
368 | m_targetWindow->SetVirtualSize( w, h ); | |
369 | ||
370 | if (do_refresh && !noRefresh) | |
371 | m_targetWindow->Refresh(true, GetScrollRect()); | |
372 | ||
373 | #ifndef __WXUNIVERSAL__ | |
374 | // If the target is not the same as the window with the scrollbars, | |
375 | // then we need to update the scrollbars here, since they won't have | |
376 | // been updated by SetVirtualSize(). | |
377 | if ( m_targetWindow != m_win ) | |
378 | #endif // !__WXUNIVERSAL__ | |
379 | { | |
380 | AdjustScrollbars(); | |
381 | } | |
382 | #ifndef __WXUNIVERSAL__ | |
383 | else | |
384 | { | |
385 | // otherwise this has been done by AdjustScrollbars, above | |
386 | } | |
387 | #endif // !__WXUNIVERSAL__ | |
388 | } | |
389 | ||
390 | // ---------------------------------------------------------------------------- | |
391 | // [target] window handling | |
392 | // ---------------------------------------------------------------------------- | |
393 | ||
394 | void wxScrollHelper::DeleteEvtHandler() | |
395 | { | |
396 | // search for m_handler in the handler list | |
397 | if ( m_win && m_handler ) | |
398 | { | |
399 | if ( m_win->RemoveEventHandler(m_handler) ) | |
400 | { | |
401 | delete m_handler; | |
402 | } | |
403 | //else: something is very wrong, so better [maybe] leak memory than | |
404 | // risk a crash because of double deletion | |
405 | ||
406 | m_handler = NULL; | |
407 | } | |
408 | } | |
409 | ||
410 | void wxScrollHelper::SetWindow(wxWindow *win) | |
411 | { | |
412 | wxCHECK_RET( win, _T("wxScrollHelper needs a window to scroll") ); | |
413 | ||
414 | m_win = win; | |
415 | ||
416 | // by default, the associated window is also the target window | |
417 | DoSetTargetWindow(win); | |
418 | } | |
419 | ||
420 | void wxScrollHelper::DoSetTargetWindow(wxWindow *target) | |
421 | { | |
422 | m_targetWindow = target; | |
423 | ||
424 | // install the event handler which will intercept the events we're | |
425 | // interested in (but only do it for our real window, not the target window | |
426 | // which we scroll - we don't need to hijack its events) | |
427 | if ( m_targetWindow == m_win ) | |
428 | { | |
429 | // if we already have a handler, delete it first | |
430 | DeleteEvtHandler(); | |
431 | ||
432 | m_handler = new wxScrollHelperEvtHandler(this); | |
433 | m_targetWindow->PushEventHandler(m_handler); | |
434 | } | |
435 | } | |
436 | ||
437 | void wxScrollHelper::SetTargetWindow(wxWindow *target) | |
438 | { | |
439 | wxCHECK_RET( target, wxT("target window must not be NULL") ); | |
440 | ||
441 | if ( target == m_targetWindow ) | |
442 | return; | |
443 | ||
444 | DoSetTargetWindow(target); | |
445 | } | |
446 | ||
447 | wxWindow *wxScrollHelper::GetTargetWindow() const | |
448 | { | |
449 | return m_targetWindow; | |
450 | } | |
451 | ||
452 | // ---------------------------------------------------------------------------- | |
453 | // scrolling implementation itself | |
454 | // ---------------------------------------------------------------------------- | |
455 | ||
456 | void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) | |
457 | { | |
458 | int nScrollInc = CalcScrollInc(event); | |
459 | if ( nScrollInc == 0 ) | |
460 | { | |
461 | // can't scroll further | |
462 | event.Skip(); | |
463 | ||
464 | return; | |
465 | } | |
466 | ||
467 | int orient = event.GetOrientation(); | |
468 | if (orient == wxHORIZONTAL) | |
469 | { | |
470 | m_xScrollPosition += nScrollInc; | |
471 | m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition); | |
472 | } | |
473 | else | |
474 | { | |
475 | m_yScrollPosition += nScrollInc; | |
476 | m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition); | |
477 | } | |
478 | ||
479 | bool needsRefresh = false; | |
480 | int dx = 0, | |
481 | dy = 0; | |
482 | if (orient == wxHORIZONTAL) | |
483 | { | |
484 | if ( m_xScrollingEnabled ) | |
485 | { | |
486 | dx = -m_xScrollPixelsPerLine * nScrollInc; | |
487 | } | |
488 | else | |
489 | { | |
490 | needsRefresh = true; | |
491 | } | |
492 | } | |
493 | else | |
494 | { | |
495 | if ( m_yScrollingEnabled ) | |
496 | { | |
497 | dy = -m_yScrollPixelsPerLine * nScrollInc; | |
498 | } | |
499 | else | |
500 | { | |
501 | needsRefresh = true; | |
502 | } | |
503 | } | |
504 | ||
505 | if ( needsRefresh ) | |
506 | { | |
507 | m_targetWindow->Refresh(true, GetScrollRect()); | |
508 | } | |
509 | else | |
510 | { | |
511 | m_targetWindow->ScrollWindow(dx, dy, GetScrollRect()); | |
512 | } | |
513 | } | |
514 | ||
515 | int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) | |
516 | { | |
517 | int pos = event.GetPosition(); | |
518 | int orient = event.GetOrientation(); | |
519 | ||
520 | int nScrollInc = 0; | |
521 | if (event.GetEventType() == wxEVT_SCROLLWIN_TOP) | |
522 | { | |
523 | if (orient == wxHORIZONTAL) | |
524 | nScrollInc = - m_xScrollPosition; | |
525 | else | |
526 | nScrollInc = - m_yScrollPosition; | |
527 | } else | |
528 | if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM) | |
529 | { | |
530 | if (orient == wxHORIZONTAL) | |
531 | nScrollInc = m_xScrollLines - m_xScrollPosition; | |
532 | else | |
533 | nScrollInc = m_yScrollLines - m_yScrollPosition; | |
534 | } else | |
535 | if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) | |
536 | { | |
537 | nScrollInc = -1; | |
538 | } else | |
539 | if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) | |
540 | { | |
541 | nScrollInc = 1; | |
542 | } else | |
543 | if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP) | |
544 | { | |
545 | if (orient == wxHORIZONTAL) | |
546 | nScrollInc = -GetScrollPageSize(wxHORIZONTAL); | |
547 | else | |
548 | nScrollInc = -GetScrollPageSize(wxVERTICAL); | |
549 | } else | |
550 | if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN) | |
551 | { | |
552 | if (orient == wxHORIZONTAL) | |
553 | nScrollInc = GetScrollPageSize(wxHORIZONTAL); | |
554 | else | |
555 | nScrollInc = GetScrollPageSize(wxVERTICAL); | |
556 | } else | |
557 | if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) || | |
558 | (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE)) | |
559 | { | |
560 | if (orient == wxHORIZONTAL) | |
561 | nScrollInc = pos - m_xScrollPosition; | |
562 | else | |
563 | nScrollInc = pos - m_yScrollPosition; | |
564 | } | |
565 | ||
566 | if (orient == wxHORIZONTAL) | |
567 | { | |
568 | if (m_xScrollPixelsPerLine > 0) | |
569 | { | |
570 | int w, h; | |
571 | GetTargetSize(&w, &h); | |
572 | ||
573 | int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; | |
574 | int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
575 | if (noPositions < 0) | |
576 | noPositions = 0; | |
577 | ||
578 | if ( (m_xScrollPosition + nScrollInc) < 0 ) | |
579 | nScrollInc = -m_xScrollPosition; // As -ve as we can go | |
580 | else if ( (m_xScrollPosition + nScrollInc) > noPositions ) | |
581 | nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go | |
582 | } | |
583 | else | |
584 | m_targetWindow->Refresh(true, GetScrollRect()); | |
585 | } | |
586 | else | |
587 | { | |
588 | if ( m_yScrollPixelsPerLine > 0 ) | |
589 | { | |
590 | if ( m_yScrollPosition + nScrollInc < 0 ) | |
591 | { | |
592 | // As -ve as we can go | |
593 | nScrollInc = -m_yScrollPosition; | |
594 | } | |
595 | else // check for the other bound | |
596 | { | |
597 | const int posMax = m_yScrollLines - m_yScrollLinesPerPage; | |
598 | if ( m_yScrollPosition + nScrollInc > posMax ) | |
599 | { | |
600 | // As +ve as we can go | |
601 | nScrollInc = posMax - m_yScrollPosition; | |
602 | } | |
603 | } | |
604 | } | |
605 | else | |
606 | { | |
607 | // VZ: why do we do this? (FIXME) | |
608 | m_targetWindow->Refresh(true, GetScrollRect()); | |
609 | } | |
610 | } | |
611 | ||
612 | return nScrollInc; | |
613 | } | |
614 | ||
615 | // Adjust the scrollbars - new version. | |
616 | void wxScrollHelper::AdjustScrollbars() | |
617 | { | |
618 | static wxRecursionGuardFlag s_flagReentrancy; | |
619 | wxRecursionGuard guard(s_flagReentrancy); | |
620 | if ( guard.IsInside() ) | |
621 | { | |
622 | // don't reenter AdjustScrollbars() while another call to | |
623 | // AdjustScrollbars() is in progress because this may lead to calling | |
624 | // ScrollWindow() twice and this can really happen under MSW if | |
625 | // SetScrollbar() call below adds or removes the scrollbar which | |
626 | // changes the window size and hence results in another | |
627 | // AdjustScrollbars() call | |
628 | return; | |
629 | } | |
630 | ||
631 | int w = 0, h = 0; | |
632 | int oldw, oldh; | |
633 | ||
634 | int oldXScroll = m_xScrollPosition; | |
635 | int oldYScroll = m_yScrollPosition; | |
636 | ||
637 | // VZ: at least under Windows this loop is useless because when scrollbars | |
638 | // [dis]appear we get a WM_SIZE resulting in another call to | |
639 | // AdjustScrollbars() anyhow. As it doesn't seem to do any harm I leave | |
640 | // it here for now but it would be better to ensure that all ports | |
641 | // generate EVT_SIZE when scrollbars [dis]appear, emulating it if | |
642 | // necessary, and remove it later | |
643 | do | |
644 | { | |
645 | GetTargetSize(&w, 0); | |
646 | ||
647 | if (m_xScrollPixelsPerLine == 0) | |
648 | { | |
649 | m_xScrollLines = 0; | |
650 | m_xScrollPosition = 0; | |
651 | m_win->SetScrollbar (wxHORIZONTAL, 0, 0, 0, false); | |
652 | } | |
653 | else | |
654 | { | |
655 | m_xScrollLines = m_targetWindow->GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine; | |
656 | ||
657 | // Calculate page size i.e. number of scroll units you get on the | |
658 | // current client window | |
659 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
660 | if (noPagePositions < 1) noPagePositions = 1; | |
661 | if ( noPagePositions > m_xScrollLines ) | |
662 | noPagePositions = m_xScrollLines; | |
663 | ||
664 | // Correct position if greater than extent of canvas minus | |
665 | // the visible portion of it or if below zero | |
666 | m_xScrollPosition = wxMin( m_xScrollLines - noPagePositions, m_xScrollPosition); | |
667 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
668 | ||
669 | m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines); | |
670 | // The amount by which we scroll when paging | |
671 | SetScrollPageSize(wxHORIZONTAL, noPagePositions); | |
672 | } | |
673 | ||
674 | GetTargetSize(0, &h); | |
675 | ||
676 | // scroll lines per page: if 0, no scrolling is needed | |
677 | int linesPerPage; | |
678 | ||
679 | if ( m_yScrollPixelsPerLine == 0 ) | |
680 | { | |
681 | // scrolling is disabled | |
682 | m_yScrollLines = 0; | |
683 | m_yScrollPosition = 0; | |
684 | linesPerPage = 0; | |
685 | } | |
686 | else // might need scrolling | |
687 | { | |
688 | int hVirt = m_targetWindow->GetVirtualSize().GetHeight(); | |
689 | m_yScrollLines = hVirt / m_yScrollPixelsPerLine; | |
690 | ||
691 | // Calculate page size i.e. number of scroll units you get on the | |
692 | // current client window | |
693 | linesPerPage = h / m_yScrollPixelsPerLine; | |
694 | if ( linesPerPage >= m_yScrollLines ) | |
695 | { | |
696 | // we're big enough to not need scrolling | |
697 | linesPerPage = | |
698 | m_yScrollLines = | |
699 | m_yScrollPosition = 0; | |
700 | } | |
701 | else // we do need a scrollbar | |
702 | { | |
703 | if ( linesPerPage < 1 ) | |
704 | linesPerPage = 1; | |
705 | ||
706 | // Correct position if greater than extent of canvas minus | |
707 | // the visible portion of it or if below zero | |
708 | const int posMax = m_yScrollLines - linesPerPage; | |
709 | if ( m_yScrollPosition > posMax ) | |
710 | m_yScrollPosition = posMax; | |
711 | else if ( m_yScrollPosition < 0 ) | |
712 | m_yScrollPosition = 0; | |
713 | } | |
714 | } | |
715 | ||
716 | m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, | |
717 | linesPerPage, m_yScrollLines); | |
718 | ||
719 | // The amount by which we scroll when paging | |
720 | SetScrollPageSize(wxVERTICAL, linesPerPage); | |
721 | ||
722 | ||
723 | // If a scrollbar (dis)appeared as a result of this, adjust them again. | |
724 | oldw = w; | |
725 | oldh = h; | |
726 | ||
727 | GetTargetSize( &w, &h ); | |
728 | } while ( w != oldw || h != oldh ); | |
729 | ||
730 | #ifdef __WXMOTIF__ | |
731 | // Sorry, some Motif-specific code to implement a backing pixmap | |
732 | // for the wxRETAINED style. Implementing a backing store can't | |
733 | // be entirely generic because it relies on the wxWindowDC implementation | |
734 | // to duplicate X drawing calls for the backing pixmap. | |
735 | ||
736 | if ( m_targetWindow->GetWindowStyle() & wxRETAINED ) | |
737 | { | |
738 | Display* dpy = XtDisplay((Widget)m_targetWindow->GetMainWidget()); | |
739 | ||
740 | int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; | |
741 | int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; | |
742 | if (m_targetWindow->GetBackingPixmap() && | |
743 | !((m_targetWindow->GetPixmapWidth() == totalPixelWidth) && | |
744 | (m_targetWindow->GetPixmapHeight() == totalPixelHeight))) | |
745 | { | |
746 | XFreePixmap (dpy, (Pixmap) m_targetWindow->GetBackingPixmap()); | |
747 | m_targetWindow->SetBackingPixmap((WXPixmap) 0); | |
748 | } | |
749 | ||
750 | if (!m_targetWindow->GetBackingPixmap() && | |
751 | (m_xScrollLines != 0) && (m_yScrollLines != 0)) | |
752 | { | |
753 | int depth = wxDisplayDepth(); | |
754 | m_targetWindow->SetPixmapWidth(totalPixelWidth); | |
755 | m_targetWindow->SetPixmapHeight(totalPixelHeight); | |
756 | m_targetWindow->SetBackingPixmap((WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), | |
757 | m_targetWindow->GetPixmapWidth(), m_targetWindow->GetPixmapHeight(), depth)); | |
758 | } | |
759 | ||
760 | } | |
761 | #endif // Motif | |
762 | ||
763 | if (oldXScroll != m_xScrollPosition) | |
764 | { | |
765 | if (m_xScrollingEnabled) | |
766 | m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0, | |
767 | GetScrollRect() ); | |
768 | else | |
769 | m_targetWindow->Refresh(true, GetScrollRect()); | |
770 | } | |
771 | ||
772 | if (oldYScroll != m_yScrollPosition) | |
773 | { | |
774 | if (m_yScrollingEnabled) | |
775 | m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), | |
776 | GetScrollRect() ); | |
777 | else | |
778 | m_targetWindow->Refresh(true, GetScrollRect()); | |
779 | } | |
780 | } | |
781 | ||
782 | void wxScrollHelper::DoPrepareDC(wxDC& dc) | |
783 | { | |
784 | wxPoint pt = dc.GetDeviceOrigin(); | |
785 | dc.SetDeviceOrigin( pt.x - m_xScrollPosition * m_xScrollPixelsPerLine, | |
786 | pt.y - m_yScrollPosition * m_yScrollPixelsPerLine ); | |
787 | dc.SetUserScale( m_scaleX, m_scaleY ); | |
788 | } | |
789 | ||
790 | void wxScrollHelper::SetScrollRate( int xstep, int ystep ) | |
791 | { | |
792 | int old_x = m_xScrollPixelsPerLine * m_xScrollPosition; | |
793 | int old_y = m_yScrollPixelsPerLine * m_yScrollPosition; | |
794 | ||
795 | m_xScrollPixelsPerLine = xstep; | |
796 | m_yScrollPixelsPerLine = ystep; | |
797 | ||
798 | int new_x = m_xScrollPixelsPerLine * m_xScrollPosition; | |
799 | int new_y = m_yScrollPixelsPerLine * m_yScrollPosition; | |
800 | ||
801 | m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition ); | |
802 | m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition ); | |
803 | m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y ); | |
804 | ||
805 | AdjustScrollbars(); | |
806 | } | |
807 | ||
808 | void wxScrollHelper::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const | |
809 | { | |
810 | if ( x_unit ) | |
811 | *x_unit = m_xScrollPixelsPerLine; | |
812 | if ( y_unit ) | |
813 | *y_unit = m_yScrollPixelsPerLine; | |
814 | } | |
815 | ||
816 | int wxScrollHelper::GetScrollPageSize(int orient) const | |
817 | { | |
818 | if ( orient == wxHORIZONTAL ) | |
819 | return m_xScrollLinesPerPage; | |
820 | else | |
821 | return m_yScrollLinesPerPage; | |
822 | } | |
823 | ||
824 | void wxScrollHelper::SetScrollPageSize(int orient, int pageSize) | |
825 | { | |
826 | if ( orient == wxHORIZONTAL ) | |
827 | m_xScrollLinesPerPage = pageSize; | |
828 | else | |
829 | m_yScrollLinesPerPage = pageSize; | |
830 | } | |
831 | ||
832 | /* | |
833 | * Scroll to given position (scroll position, not pixel position) | |
834 | */ | |
835 | void wxScrollHelper::Scroll( int x_pos, int y_pos ) | |
836 | { | |
837 | if (!m_targetWindow) | |
838 | return; | |
839 | ||
840 | if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && | |
841 | ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; | |
842 | ||
843 | int w, h; | |
844 | GetTargetSize(&w, &h); | |
845 | ||
846 | if ((x_pos != -1) && (m_xScrollPixelsPerLine)) | |
847 | { | |
848 | int old_x = m_xScrollPosition; | |
849 | m_xScrollPosition = x_pos; | |
850 | ||
851 | // Calculate page size i.e. number of scroll units you get on the | |
852 | // current client window | |
853 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
854 | if (noPagePositions < 1) noPagePositions = 1; | |
855 | ||
856 | // Correct position if greater than extent of canvas minus | |
857 | // the visible portion of it or if below zero | |
858 | m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition ); | |
859 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
860 | ||
861 | if (old_x != m_xScrollPosition) { | |
862 | m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition ); | |
863 | m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0, | |
864 | GetScrollRect() ); | |
865 | } | |
866 | } | |
867 | if ((y_pos != -1) && (m_yScrollPixelsPerLine)) | |
868 | { | |
869 | int old_y = m_yScrollPosition; | |
870 | m_yScrollPosition = y_pos; | |
871 | ||
872 | // Calculate page size i.e. number of scroll units you get on the | |
873 | // current client window | |
874 | int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
875 | if (noPagePositions < 1) noPagePositions = 1; | |
876 | ||
877 | // Correct position if greater than extent of canvas minus | |
878 | // the visible portion of it or if below zero | |
879 | m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition ); | |
880 | m_yScrollPosition = wxMax( 0, m_yScrollPosition ); | |
881 | ||
882 | if (old_y != m_yScrollPosition) { | |
883 | m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition ); | |
884 | m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine, | |
885 | GetScrollRect() ); | |
886 | } | |
887 | } | |
888 | } | |
889 | ||
890 | void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll) | |
891 | { | |
892 | m_xScrollingEnabled = x_scroll; | |
893 | m_yScrollingEnabled = y_scroll; | |
894 | } | |
895 | ||
896 | // Where the current view starts from | |
897 | void wxScrollHelper::GetViewStart (int *x, int *y) const | |
898 | { | |
899 | if ( x ) | |
900 | *x = m_xScrollPosition; | |
901 | if ( y ) | |
902 | *y = m_yScrollPosition; | |
903 | } | |
904 | ||
905 | void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const | |
906 | { | |
907 | if ( xx ) | |
908 | *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; | |
909 | if ( yy ) | |
910 | *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; | |
911 | } | |
912 | ||
913 | void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const | |
914 | { | |
915 | if ( xx ) | |
916 | *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; | |
917 | if ( yy ) | |
918 | *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine; | |
919 | } | |
920 | ||
921 | // ---------------------------------------------------------------------------- | |
922 | // event handlers | |
923 | // ---------------------------------------------------------------------------- | |
924 | ||
925 | // Default OnSize resets scrollbars, if any | |
926 | void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event)) | |
927 | { | |
928 | if( m_win->GetAutoLayout() || m_targetWindow->GetAutoLayout() ) | |
929 | { | |
930 | if ( m_targetWindow != m_win ) | |
931 | m_targetWindow->FitInside(); | |
932 | ||
933 | m_win->FitInside(); | |
934 | ||
935 | // FIXME: Something is really weird here... This should be | |
936 | // called by FitInside above (and apparently is), yet the | |
937 | // scrollsub sample will get the scrollbar wrong if resized | |
938 | // quickly. This masks the bug, but is surely not the right | |
939 | // answer at all. | |
940 | AdjustScrollbars(); | |
941 | } | |
942 | else | |
943 | AdjustScrollbars(); | |
944 | } | |
945 | ||
946 | // This calls OnDraw, having adjusted the origin according to the current | |
947 | // scroll position | |
948 | void wxScrollHelper::HandleOnPaint(wxPaintEvent& WXUNUSED(event)) | |
949 | { | |
950 | // don't use m_targetWindow here, this is always called for ourselves | |
951 | wxPaintDC dc(m_win); | |
952 | DoPrepareDC(dc); | |
953 | ||
954 | OnDraw(dc); | |
955 | } | |
956 | ||
957 | // kbd handling: notice that we use OnChar() and not OnKeyDown() for | |
958 | // compatibility here - if we used OnKeyDown(), the programs which process | |
959 | // arrows themselves in their OnChar() would never get the message and like | |
960 | // this they always have the priority | |
961 | void wxScrollHelper::HandleOnChar(wxKeyEvent& event) | |
962 | { | |
963 | int stx, sty, // view origin | |
964 | szx, szy, // view size (total) | |
965 | clix, cliy; // view size (on screen) | |
966 | ||
967 | GetViewStart(&stx, &sty); | |
968 | GetTargetSize(&clix, &cliy); | |
969 | m_targetWindow->GetVirtualSize(&szx, &szy); | |
970 | ||
971 | if( m_xScrollPixelsPerLine ) | |
972 | { | |
973 | clix /= m_xScrollPixelsPerLine; | |
974 | szx /= m_xScrollPixelsPerLine; | |
975 | } | |
976 | else | |
977 | { | |
978 | clix = 0; | |
979 | szx = -1; | |
980 | } | |
981 | if( m_yScrollPixelsPerLine ) | |
982 | { | |
983 | cliy /= m_yScrollPixelsPerLine; | |
984 | szy /= m_yScrollPixelsPerLine; | |
985 | } | |
986 | else | |
987 | { | |
988 | cliy = 0; | |
989 | szy = -1; | |
990 | } | |
991 | ||
992 | int xScrollOld = m_xScrollPosition, | |
993 | yScrollOld = m_yScrollPosition; | |
994 | ||
995 | int dsty; | |
996 | switch ( event.GetKeyCode() ) | |
997 | { | |
998 | case WXK_PAGEUP: | |
999 | case WXK_PRIOR: | |
1000 | dsty = sty - (5 * cliy / 6); | |
1001 | Scroll(-1, (dsty == -1) ? 0 : dsty); | |
1002 | break; | |
1003 | ||
1004 | case WXK_PAGEDOWN: | |
1005 | case WXK_NEXT: | |
1006 | Scroll(-1, sty + (5 * cliy / 6)); | |
1007 | break; | |
1008 | ||
1009 | case WXK_HOME: | |
1010 | Scroll(0, event.ControlDown() ? 0 : -1); | |
1011 | break; | |
1012 | ||
1013 | case WXK_END: | |
1014 | Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1); | |
1015 | break; | |
1016 | ||
1017 | case WXK_UP: | |
1018 | Scroll(-1, sty - 1); | |
1019 | break; | |
1020 | ||
1021 | case WXK_DOWN: | |
1022 | Scroll(-1, sty + 1); | |
1023 | break; | |
1024 | ||
1025 | case WXK_LEFT: | |
1026 | Scroll(stx - 1, -1); | |
1027 | break; | |
1028 | ||
1029 | case WXK_RIGHT: | |
1030 | Scroll(stx + 1, -1); | |
1031 | break; | |
1032 | ||
1033 | default: | |
1034 | // not for us | |
1035 | event.Skip(); | |
1036 | } | |
1037 | ||
1038 | if ( m_xScrollPosition != xScrollOld ) | |
1039 | { | |
1040 | wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition, | |
1041 | wxHORIZONTAL); | |
1042 | event.SetEventObject(m_win); | |
1043 | m_win->GetEventHandler()->ProcessEvent(event); | |
1044 | } | |
1045 | ||
1046 | if ( m_yScrollPosition != yScrollOld ) | |
1047 | { | |
1048 | wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition, | |
1049 | wxVERTICAL); | |
1050 | event.SetEventObject(m_win); | |
1051 | m_win->GetEventHandler()->ProcessEvent(event); | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | // ---------------------------------------------------------------------------- | |
1056 | // autoscroll stuff: these functions deal with sending fake scroll events when | |
1057 | // a captured mouse is being held outside the window | |
1058 | // ---------------------------------------------------------------------------- | |
1059 | ||
1060 | bool wxScrollHelper::SendAutoScrollEvents(wxScrollWinEvent& event) const | |
1061 | { | |
1062 | // only send the event if the window is scrollable in this direction | |
1063 | wxWindow *win = (wxWindow *)event.GetEventObject(); | |
1064 | return win->HasScrollbar(event.GetOrientation()); | |
1065 | } | |
1066 | ||
1067 | void wxScrollHelper::StopAutoScrolling() | |
1068 | { | |
1069 | #if wxUSE_TIMER | |
1070 | if ( m_timerAutoScroll ) | |
1071 | { | |
1072 | delete m_timerAutoScroll; | |
1073 | m_timerAutoScroll = (wxTimer *)NULL; | |
1074 | } | |
1075 | #endif | |
1076 | } | |
1077 | ||
1078 | void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event) | |
1079 | { | |
1080 | StopAutoScrolling(); | |
1081 | ||
1082 | event.Skip(); | |
1083 | } | |
1084 | ||
1085 | void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) | |
1086 | { | |
1087 | // don't prevent the usual processing of the event from taking place | |
1088 | event.Skip(); | |
1089 | ||
1090 | // when a captured mouse leave a scrolled window we start generate | |
1091 | // scrolling events to allow, for example, extending selection beyond the | |
1092 | // visible area in some controls | |
1093 | if ( wxWindow::GetCapture() == m_targetWindow ) | |
1094 | { | |
1095 | // where is the mouse leaving? | |
1096 | int pos, orient; | |
1097 | wxPoint pt = event.GetPosition(); | |
1098 | if ( pt.x < 0 ) | |
1099 | { | |
1100 | orient = wxHORIZONTAL; | |
1101 | pos = 0; | |
1102 | } | |
1103 | else if ( pt.y < 0 ) | |
1104 | { | |
1105 | orient = wxVERTICAL; | |
1106 | pos = 0; | |
1107 | } | |
1108 | else // we're lower or to the right of the window | |
1109 | { | |
1110 | wxSize size = m_targetWindow->GetClientSize(); | |
1111 | if ( pt.x > size.x ) | |
1112 | { | |
1113 | orient = wxHORIZONTAL; | |
1114 | pos = m_xScrollLines; | |
1115 | } | |
1116 | else if ( pt.y > size.y ) | |
1117 | { | |
1118 | orient = wxVERTICAL; | |
1119 | pos = m_yScrollLines; | |
1120 | } | |
1121 | else // this should be impossible | |
1122 | { | |
1123 | // but seems to happen sometimes under wxMSW - maybe it's a bug | |
1124 | // there but for now just ignore it | |
1125 | ||
1126 | //wxFAIL_MSG( _T("can't understand where has mouse gone") ); | |
1127 | ||
1128 | return; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | // only start the auto scroll timer if the window can be scrolled in | |
1133 | // this direction | |
1134 | if ( !m_targetWindow->HasScrollbar(orient) ) | |
1135 | return; | |
1136 | ||
1137 | #if wxUSE_TIMER | |
1138 | delete m_timerAutoScroll; | |
1139 | m_timerAutoScroll = new wxAutoScrollTimer | |
1140 | ( | |
1141 | m_targetWindow, this, | |
1142 | pos == 0 ? wxEVT_SCROLLWIN_LINEUP | |
1143 | : wxEVT_SCROLLWIN_LINEDOWN, | |
1144 | pos, | |
1145 | orient | |
1146 | ); | |
1147 | m_timerAutoScroll->Start(50); // FIXME: make configurable | |
1148 | #endif | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | #if wxUSE_MOUSEWHEEL | |
1153 | ||
1154 | void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event) | |
1155 | { | |
1156 | m_wheelRotation += event.GetWheelRotation(); | |
1157 | int lines = m_wheelRotation / event.GetWheelDelta(); | |
1158 | m_wheelRotation -= lines * event.GetWheelDelta(); | |
1159 | ||
1160 | if (lines != 0) | |
1161 | { | |
1162 | ||
1163 | wxScrollWinEvent newEvent; | |
1164 | ||
1165 | newEvent.SetPosition(0); | |
1166 | newEvent.SetOrientation(wxVERTICAL); | |
1167 | newEvent.m_eventObject = m_win; | |
1168 | ||
1169 | if (event.IsPageScroll()) | |
1170 | { | |
1171 | if (lines > 0) | |
1172 | newEvent.m_eventType = wxEVT_SCROLLWIN_PAGEUP; | |
1173 | else | |
1174 | newEvent.m_eventType = wxEVT_SCROLLWIN_PAGEDOWN; | |
1175 | ||
1176 | m_win->GetEventHandler()->ProcessEvent(newEvent); | |
1177 | } | |
1178 | else | |
1179 | { | |
1180 | lines *= event.GetLinesPerAction(); | |
1181 | if (lines > 0) | |
1182 | newEvent.m_eventType = wxEVT_SCROLLWIN_LINEUP; | |
1183 | else | |
1184 | newEvent.m_eventType = wxEVT_SCROLLWIN_LINEDOWN; | |
1185 | ||
1186 | int times = abs(lines); | |
1187 | for (; times > 0; times--) | |
1188 | m_win->GetEventHandler()->ProcessEvent(newEvent); | |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | #endif // wxUSE_MOUSEWHEEL | |
1194 | ||
1195 | // ---------------------------------------------------------------------------- | |
1196 | // wxGenericScrolledWindow implementation | |
1197 | // ---------------------------------------------------------------------------- | |
1198 | ||
1199 | IMPLEMENT_DYNAMIC_CLASS(wxGenericScrolledWindow, wxPanel) | |
1200 | ||
1201 | BEGIN_EVENT_TABLE(wxGenericScrolledWindow, wxPanel) | |
1202 | EVT_PAINT(wxGenericScrolledWindow::OnPaint) | |
1203 | END_EVENT_TABLE() | |
1204 | ||
1205 | bool wxGenericScrolledWindow::Create(wxWindow *parent, | |
1206 | wxWindowID id, | |
1207 | const wxPoint& pos, | |
1208 | const wxSize& size, | |
1209 | long style, | |
1210 | const wxString& name) | |
1211 | { | |
1212 | m_targetWindow = this; | |
1213 | ||
1214 | bool ok = wxPanel::Create(parent, id, pos, size, style, name); | |
1215 | ||
1216 | return ok; | |
1217 | } | |
1218 | ||
1219 | wxGenericScrolledWindow::~wxGenericScrolledWindow() | |
1220 | { | |
1221 | } | |
1222 | ||
1223 | bool wxGenericScrolledWindow::Layout() | |
1224 | { | |
1225 | if (GetSizer() && m_targetWindow == this) | |
1226 | { | |
1227 | // If we're the scroll target, take into account the | |
1228 | // virtual size and scrolled position of the window. | |
1229 | ||
1230 | int x, y, w, h; | |
1231 | CalcScrolledPosition(0,0, &x,&y); | |
1232 | GetVirtualSize(&w, &h); | |
1233 | GetSizer()->SetDimension(x, y, w, h); | |
1234 | return true; | |
1235 | } | |
1236 | ||
1237 | // fall back to default for LayoutConstraints | |
1238 | return wxPanel::Layout(); | |
1239 | } | |
1240 | ||
1241 | void wxGenericScrolledWindow::DoSetVirtualSize(int x, int y) | |
1242 | { | |
1243 | wxPanel::DoSetVirtualSize( x, y ); | |
1244 | AdjustScrollbars(); | |
1245 | ||
1246 | if (GetAutoLayout()) | |
1247 | Layout(); | |
1248 | } | |
1249 | ||
1250 | void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event) | |
1251 | { | |
1252 | // the user code didn't really draw the window if we got here, so set this | |
1253 | // flag to try to call OnDraw() later | |
1254 | m_handler->ResetDrawnFlag(); | |
1255 | ||
1256 | event.Skip(); | |
1257 | } | |
1258 | ||
1259 | #ifdef __WXMSW__ | |
1260 | WXLRESULT | |
1261 | wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg, | |
1262 | WXWPARAM wParam, | |
1263 | WXLPARAM lParam) | |
1264 | { | |
1265 | WXLRESULT rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam); | |
1266 | ||
1267 | #ifndef __WXWINCE__ | |
1268 | // we need to process arrows ourselves for scrolling | |
1269 | if ( nMsg == WM_GETDLGCODE ) | |
1270 | { | |
1271 | rc |= DLGC_WANTARROWS; | |
1272 | } | |
1273 | #endif | |
1274 | ||
1275 | return rc; | |
1276 | } | |
1277 | ||
1278 | #endif // __WXMSW__ | |
1279 | ||
1280 | #endif // !wxGTK | |
1281 | ||
1282 | // vi:sts=4:sw=4:et |