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Added wxRenderer method for drawing selection
[wxWidgets.git] / src / univ / scrolbar.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/univ/scrolbar.cpp
3 // Purpose: wxScrollBar implementation
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 20.08.00
7 // RCS-ID: $Id$
8 // Copyright: (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #include "wx/wxprec.h"
21
22 #ifdef __BORLANDC__
23 #pragma hdrstop
24 #endif
25
26 #if wxUSE_SCROLLBAR
27
28 #include "wx/scrolbar.h"
29
30 #ifndef WX_PRECOMP
31 #include "wx/timer.h"
32 #include "wx/dcclient.h"
33 #include "wx/validate.h"
34 #include "wx/log.h"
35 #endif
36
37 #include "wx/univ/scrtimer.h"
38
39 #include "wx/univ/renderer.h"
40 #include "wx/univ/inphand.h"
41 #include "wx/univ/theme.h"
42
43 #define WXDEBUG_SCROLLBAR
44
45 #ifndef __WXDEBUG__
46 #undef WXDEBUG_SCROLLBAR
47 #endif // !__WXDEBUG__
48
49 #if defined(WXDEBUG_SCROLLBAR) && defined(__WXMSW__) && !defined(__WXMICROWIN__)
50 #include "wx/msw/private.h"
51 #endif
52
53 // ----------------------------------------------------------------------------
54 // wxScrollBarTimer: this class is used to repeatedly scroll the scrollbar
55 // when the mouse is help pressed on the arrow or on the bar. It generates the
56 // given scroll action command periodically.
57 // ----------------------------------------------------------------------------
58
59 class wxScrollBarTimer : public wxScrollTimer
60 {
61 public:
62 wxScrollBarTimer(wxStdScrollBarInputHandler *handler,
63 const wxControlAction& action,
64 wxScrollBar *control);
65
66 protected:
67 virtual bool DoNotify();
68
69 private:
70 wxStdScrollBarInputHandler *m_handler;
71 wxControlAction m_action;
72 wxScrollBar *m_control;
73 };
74
75 // ============================================================================
76 // implementation
77 // ============================================================================
78
79 IMPLEMENT_DYNAMIC_CLASS(wxScrollBar, wxControl)
80
81 BEGIN_EVENT_TABLE(wxScrollBar, wxScrollBarBase)
82 END_EVENT_TABLE()
83
84 // ----------------------------------------------------------------------------
85 // creation
86 // ----------------------------------------------------------------------------
87
88 #ifdef __VISUALC__
89 // warning C4355: 'this' : used in base member initializer list
90 #pragma warning(disable:4355) // so what? disable it...
91 #endif
92
93 wxScrollBar::wxScrollBar()
94 : m_arrows(this)
95 {
96 Init();
97 }
98
99 wxScrollBar::wxScrollBar(wxWindow *parent,
100 wxWindowID id,
101 const wxPoint& pos,
102 const wxSize& size,
103 long style,
104 const wxValidator& validator,
105 const wxString& name)
106 : m_arrows(this)
107 {
108 Init();
109
110 (void)Create(parent, id, pos, size, style, validator, name);
111 }
112
113 #ifdef __VISUALC__
114 // warning C4355: 'this' : used in base member initializer list
115 #pragma warning(default:4355)
116 #endif
117
118 void wxScrollBar::Init()
119 {
120 m_range =
121 m_thumbSize =
122 m_thumbPos =
123 m_pageSize = 0;
124
125 m_thumbPosOld = -1;
126
127 for ( size_t n = 0; n < WXSIZEOF(m_elementsState); n++ )
128 {
129 m_elementsState[n] = 0;
130 }
131
132 m_dirty = false;
133 }
134
135 bool wxScrollBar::Create(wxWindow *parent,
136 wxWindowID id,
137 const wxPoint &pos,
138 const wxSize &size,
139 long style,
140 const wxValidator& validator,
141 const wxString &name)
142 {
143 // the scrollbars never have the border
144 style &= ~wxBORDER_MASK;
145
146 if ( !wxControl::Create(parent, id, pos, size, style, validator, name) )
147 return false;
148
149 SetBestSize(size);
150
151 // override the cursor of the target window (if any)
152 SetCursor(wxCURSOR_ARROW);
153
154 CreateInputHandler(wxINP_HANDLER_SCROLLBAR);
155
156 return true;
157 }
158
159 wxScrollBar::~wxScrollBar()
160 {
161 }
162
163 // ----------------------------------------------------------------------------
164 // misc accessors
165 // ----------------------------------------------------------------------------
166
167 bool wxScrollBar::IsStandalone() const
168 {
169 wxWindow *parent = GetParent();
170 if ( !parent )
171 {
172 return true;
173 }
174
175 return (parent->GetScrollbar(wxHORIZONTAL) != this) &&
176 (parent->GetScrollbar(wxVERTICAL) != this);
177 }
178
179 bool wxScrollBar::AcceptsFocus() const
180 {
181 // the window scrollbars never accept focus
182 return wxScrollBarBase::AcceptsFocus() && IsStandalone();
183 }
184
185 // ----------------------------------------------------------------------------
186 // scrollbar API
187 // ----------------------------------------------------------------------------
188
189 void wxScrollBar::DoSetThumb(int pos)
190 {
191 // don't assert hecks here, we're a private function which is meant to be
192 // called with any args at all
193 if ( pos < 0 )
194 {
195 pos = 0;
196 }
197 else if ( pos > m_range - m_thumbSize )
198 {
199 pos = m_range - m_thumbSize;
200 }
201
202 if ( m_thumbPos == pos )
203 {
204 // nothing changed, avoid refreshes which would provoke flicker
205 return;
206 }
207
208 if ( m_thumbPosOld == -1 )
209 {
210 // remember the old thumb position
211 m_thumbPosOld = m_thumbPos;
212 }
213
214 m_thumbPos = pos;
215
216 // we have to refresh the part of the bar which was under the thumb and the
217 // thumb itself
218 m_elementsState[Element_Thumb] |= wxCONTROL_DIRTY;
219 m_elementsState[m_thumbPos > m_thumbPosOld
220 ? Element_Bar_1 : Element_Bar_2] |= wxCONTROL_DIRTY;
221 m_dirty = true;
222 }
223
224 int wxScrollBar::GetThumbPosition() const
225 {
226 return m_thumbPos;
227 }
228
229 int wxScrollBar::GetThumbSize() const
230 {
231 return m_thumbSize;
232 }
233
234 int wxScrollBar::GetPageSize() const
235 {
236 return m_pageSize;
237 }
238
239 int wxScrollBar::GetRange() const
240 {
241 return m_range;
242 }
243
244 void wxScrollBar::SetThumbPosition(int pos)
245 {
246 wxCHECK_RET( pos >= 0 && pos <= m_range, _T("thumb position out of range") );
247
248 DoSetThumb(pos);
249 }
250
251 void wxScrollBar::SetScrollbar(int position, int thumbSize,
252 int range, int pageSize,
253 bool refresh)
254 {
255 // we only refresh everything when the range changes, thumb position
256 // changes are handled in OnIdle
257 bool needsRefresh = (range != m_range) ||
258 (thumbSize != m_thumbSize) ||
259 (pageSize != m_pageSize);
260
261 // set all parameters
262 m_range = range;
263 m_thumbSize = thumbSize;
264 SetThumbPosition(position);
265 m_pageSize = pageSize;
266
267 // ignore refresh parameter unless we really need to refresh everything -
268 // there ir a lot of existing code which just calls SetScrollbar() without
269 // specifying the last parameter even though it doesn't need at all to
270 // refresh the window immediately
271 if ( refresh && needsRefresh )
272 {
273 // and update the window
274 Refresh();
275 Update();
276 }
277 }
278
279 // ----------------------------------------------------------------------------
280 // geometry
281 // ----------------------------------------------------------------------------
282
283 wxSize wxScrollBar::DoGetBestClientSize() const
284 {
285 // this dimension is completely arbitrary
286 static const wxCoord SIZE = 140;
287
288 wxSize size = m_renderer->GetScrollbarArrowSize();
289 if ( IsVertical() )
290 {
291 size.y = SIZE;
292 }
293 else // horizontal
294 {
295 size.x = SIZE;
296 }
297
298 return size;
299 }
300
301 wxScrollArrows::Arrow wxScrollBar::HitTest(const wxPoint& pt) const
302 {
303 switch ( m_renderer->HitTestScrollbar(this, pt) )
304 {
305 case wxHT_SCROLLBAR_ARROW_LINE_1:
306 return wxScrollArrows::Arrow_First;
307
308 case wxHT_SCROLLBAR_ARROW_LINE_2:
309 return wxScrollArrows::Arrow_Second;
310
311 default:
312 return wxScrollArrows::Arrow_None;
313 }
314 }
315
316 // ----------------------------------------------------------------------------
317 // drawing
318 // ----------------------------------------------------------------------------
319
320 void wxScrollBar::OnInternalIdle()
321 {
322 UpdateThumb();
323 wxControl::OnInternalIdle();
324 }
325
326 void wxScrollBar::UpdateThumb()
327 {
328 if ( m_dirty )
329 {
330 for ( size_t n = 0; n < WXSIZEOF(m_elementsState); n++ )
331 {
332 if ( m_elementsState[n] & wxCONTROL_DIRTY )
333 {
334 wxRect rect = GetRenderer()->GetScrollbarRect(this, (Element)n);
335
336 if ( rect.width && rect.height )
337 {
338 // we try to avoid redrawing the entire shaft (which might
339 // be quite long) if possible by only redrawing the area
340 // wich really changed
341 if ( (n == Element_Bar_1 || n == Element_Bar_2) &&
342 (m_thumbPosOld != -1) )
343 {
344 // the less efficient but more reliable (i.e. this will
345 // probably work everywhere) version: refresh the
346 // distance covered by thumb since the last update
347 #if 0
348 wxRect rectOld =
349 GetRenderer()->GetScrollbarRect(this,
350 (Element)n,
351 m_thumbPosOld);
352 if ( IsVertical() )
353 {
354 if ( n == Element_Bar_1 )
355 rect.SetTop(rectOld.GetBottom());
356 else
357 rect.SetBottom(rectOld.GetBottom());
358 }
359 else // horizontal
360 {
361 if ( n == Element_Bar_1 )
362 rect.SetLeft(rectOld.GetRight());
363 else
364 rect.SetRight(rectOld.GetRight());
365 }
366 #else // efficient version: only repaint the area occupied by
367 // the thumb previously - we can't do better than this
368 rect = GetRenderer()->GetScrollbarRect(this,
369 Element_Thumb,
370 m_thumbPosOld);
371 #endif // 0/1
372 }
373
374 #ifdef WXDEBUG_SCROLLBAR
375 static bool s_refreshDebug = false;
376 if ( s_refreshDebug )
377 {
378 wxClientDC dc(this);
379 dc.SetBrush(*wxCYAN_BRUSH);
380 dc.SetPen(*wxTRANSPARENT_PEN);
381 dc.DrawRectangle(rect);
382
383 // under Unix we use "--sync" X option for this
384 #if defined(__WXMSW__) && !defined(__WXMICROWIN__)
385 ::GdiFlush();
386 ::Sleep(200);
387 #endif // __WXMSW__
388 }
389 #endif // WXDEBUG_SCROLLBAR
390
391 Refresh(false, &rect);
392 }
393
394 m_elementsState[n] &= ~wxCONTROL_DIRTY;
395 }
396 }
397
398 m_dirty = false;
399 }
400 }
401
402 void wxScrollBar::DoDraw(wxControlRenderer *renderer)
403 {
404 renderer->DrawScrollbar(this, m_thumbPosOld);
405
406 // clear all dirty flags
407 m_dirty = false;
408 m_thumbPosOld = -1;
409 }
410
411 // ----------------------------------------------------------------------------
412 // state flags
413 // ----------------------------------------------------------------------------
414
415 static inline wxScrollBar::Element ElementForArrow(wxScrollArrows::Arrow arrow)
416 {
417 return arrow == wxScrollArrows::Arrow_First
418 ? wxScrollBar::Element_Arrow_Line_1
419 : wxScrollBar::Element_Arrow_Line_2;
420 }
421
422 int wxScrollBar::GetArrowState(wxScrollArrows::Arrow arrow) const
423 {
424 return GetState(ElementForArrow(arrow));
425 }
426
427 void wxScrollBar::SetArrowFlag(wxScrollArrows::Arrow arrow, int flag, bool set)
428 {
429 Element which = ElementForArrow(arrow);
430 int state = GetState(which);
431 if ( set )
432 state |= flag;
433 else
434 state &= ~flag;
435
436 SetState(which, state);
437 }
438
439 int wxScrollBar::GetState(Element which) const
440 {
441 // if the entire scrollbar is disabled, all of its elements are too
442 int flags = m_elementsState[which];
443 if ( !IsEnabled() )
444 flags |= wxCONTROL_DISABLED;
445
446 return flags;
447 }
448
449 void wxScrollBar::SetState(Element which, int flags)
450 {
451 if ( (int)(m_elementsState[which] & ~wxCONTROL_DIRTY) != flags )
452 {
453 m_elementsState[which] = flags | wxCONTROL_DIRTY;
454
455 m_dirty = true;
456 }
457 }
458
459 // ----------------------------------------------------------------------------
460 // input processing
461 // ----------------------------------------------------------------------------
462
463 bool wxScrollBar::OnArrow(wxScrollArrows::Arrow arrow)
464 {
465 int oldThumbPos = GetThumbPosition();
466 PerformAction(arrow == wxScrollArrows::Arrow_First
467 ? wxACTION_SCROLL_LINE_UP
468 : wxACTION_SCROLL_LINE_DOWN);
469
470 // did we scroll till the end?
471 return GetThumbPosition() != oldThumbPos;
472 }
473
474 bool wxScrollBar::PerformAction(const wxControlAction& action,
475 long numArg,
476 const wxString& strArg)
477 {
478 int thumbOld = m_thumbPos;
479
480 bool notify = false; // send an event about the change?
481
482 wxEventType scrollType;
483
484 // test for thumb move first as these events happen in quick succession
485 if ( action == wxACTION_SCROLL_THUMB_MOVE )
486 {
487 DoSetThumb(numArg);
488
489 // VS: we have to force redraw here, otherwise the thumb will lack
490 // behind mouse cursor
491 UpdateThumb();
492
493 scrollType = wxEVT_SCROLLWIN_THUMBTRACK;
494 }
495 else if ( action == wxACTION_SCROLL_LINE_UP )
496 {
497 scrollType = wxEVT_SCROLLWIN_LINEUP;
498 ScrollLines(-1);
499 }
500 else if ( action == wxACTION_SCROLL_LINE_DOWN )
501 {
502 scrollType = wxEVT_SCROLLWIN_LINEDOWN;
503 ScrollLines(1);
504 }
505 else if ( action == wxACTION_SCROLL_PAGE_UP )
506 {
507 scrollType = wxEVT_SCROLLWIN_PAGEUP;
508 ScrollPages(-1);
509 }
510 else if ( action == wxACTION_SCROLL_PAGE_DOWN )
511 {
512 scrollType = wxEVT_SCROLLWIN_PAGEDOWN;
513 ScrollPages(1);
514 }
515 else if ( action == wxACTION_SCROLL_START )
516 {
517 scrollType = wxEVT_SCROLLWIN_THUMBRELEASE; // anything better?
518 ScrollToStart();
519 }
520 else if ( action == wxACTION_SCROLL_END )
521 {
522 scrollType = wxEVT_SCROLLWIN_THUMBRELEASE; // anything better?
523 ScrollToEnd();
524 }
525 else if ( action == wxACTION_SCROLL_THUMB_DRAG )
526 {
527 // we won't use it but this line suppresses the compiler
528 // warning about "variable may be used without having been
529 // initialized"
530 scrollType = wxEVT_NULL;
531 }
532 else if ( action == wxACTION_SCROLL_THUMB_RELEASE )
533 {
534 // always notify about this
535 notify = true;
536 scrollType = wxEVT_SCROLLWIN_THUMBRELEASE;
537 }
538 else
539 return wxControl::PerformAction(action, numArg, strArg);
540
541 // has scrollbar position changed?
542 bool changed = m_thumbPos != thumbOld;
543 if ( notify || changed )
544 {
545 if ( IsStandalone() )
546 {
547 // we should generate EVT_SCROLL events for the standalone
548 // scrollbars and not the EVT_SCROLLWIN ones
549 //
550 // NB: we assume that scrollbar events are sequentially numbered
551 // but this should be ok as other code relies on this as well
552 scrollType += wxEVT_SCROLL_TOP - wxEVT_SCROLLWIN_TOP;
553 wxScrollEvent event(scrollType, this->GetId(), m_thumbPos,
554 IsVertical() ? wxVERTICAL : wxHORIZONTAL);
555 event.SetEventObject(this);
556 GetParent()->GetEventHandler()->ProcessEvent(event);
557 }
558 else // part of the window
559 {
560 wxScrollWinEvent event(scrollType, m_thumbPos,
561 IsVertical() ? wxVERTICAL : wxHORIZONTAL);
562 event.SetEventObject(this);
563 GetParent()->GetEventHandler()->ProcessEvent(event);
564 }
565 }
566
567 return true;
568 }
569
570 void wxScrollBar::ScrollToStart()
571 {
572 DoSetThumb(0);
573 }
574
575 void wxScrollBar::ScrollToEnd()
576 {
577 DoSetThumb(m_range - m_thumbSize);
578 }
579
580 bool wxScrollBar::ScrollLines(int nLines)
581 {
582 DoSetThumb(m_thumbPos + nLines);
583 return true;
584 }
585
586 bool wxScrollBar::ScrollPages(int nPages)
587 {
588 DoSetThumb(m_thumbPos + nPages*m_pageSize);
589 return true;
590 }
591
592 // ============================================================================
593 // scroll bar input handler
594 // ============================================================================
595
596 // ----------------------------------------------------------------------------
597 // wxScrollBarTimer
598 // ----------------------------------------------------------------------------
599
600 wxScrollBarTimer::wxScrollBarTimer(wxStdScrollBarInputHandler *handler,
601 const wxControlAction& action,
602 wxScrollBar *control)
603 {
604 m_handler = handler;
605 m_action = action;
606 m_control = control;
607 }
608
609 bool wxScrollBarTimer::DoNotify()
610 {
611 return m_handler->OnScrollTimer(m_control, m_action);
612 }
613
614 // ----------------------------------------------------------------------------
615 // wxStdScrollBarInputHandler
616 // ----------------------------------------------------------------------------
617
618 wxStdScrollBarInputHandler::wxStdScrollBarInputHandler(wxRenderer *renderer,
619 wxInputHandler *handler)
620 : wxStdInputHandler(handler)
621 {
622 m_renderer = renderer;
623 m_winCapture = NULL;
624 m_htLast = wxHT_NOWHERE;
625 m_timerScroll = NULL;
626 }
627
628 wxStdScrollBarInputHandler::~wxStdScrollBarInputHandler()
629 {
630 // normally, it's NULL by now but just in case the user somehow managed to
631 // keep the mouse captured until now...
632 delete m_timerScroll;
633 }
634
635 void wxStdScrollBarInputHandler::SetElementState(wxScrollBar *control,
636 int flag,
637 bool doIt)
638 {
639 if ( m_htLast > wxHT_SCROLLBAR_FIRST && m_htLast < wxHT_SCROLLBAR_LAST )
640 {
641 wxScrollBar::Element
642 elem = (wxScrollBar::Element)(m_htLast - wxHT_SCROLLBAR_FIRST - 1);
643
644 int flags = control->GetState(elem);
645 if ( doIt )
646 flags |= flag;
647 else
648 flags &= ~flag;
649 control->SetState(elem, flags);
650 }
651 }
652
653 bool wxStdScrollBarInputHandler::OnScrollTimer(wxScrollBar *scrollbar,
654 const wxControlAction& action)
655 {
656 int oldThumbPos = scrollbar->GetThumbPosition();
657 scrollbar->PerformAction(action);
658 if ( scrollbar->GetThumbPosition() != oldThumbPos )
659 return true;
660
661 // we scrolled till the end
662 m_timerScroll->Stop();
663
664 return false;
665 }
666
667 void wxStdScrollBarInputHandler::StopScrolling(wxScrollBar *control)
668 {
669 // return everything to the normal state
670 if ( m_winCapture )
671 {
672 m_winCapture->ReleaseMouse();
673 m_winCapture = NULL;
674 }
675
676 m_btnCapture = -1;
677
678 if ( m_timerScroll )
679 {
680 delete m_timerScroll;
681 m_timerScroll = NULL;
682 }
683
684 // unpress the arrow and highlight the current element
685 Press(control, false);
686 }
687
688 wxCoord
689 wxStdScrollBarInputHandler::GetMouseCoord(const wxScrollBar *scrollbar,
690 const wxMouseEvent& event) const
691 {
692 wxPoint pt = event.GetPosition();
693 return scrollbar->GetWindowStyle() & wxVERTICAL ? pt.y : pt.x;
694 }
695
696 void wxStdScrollBarInputHandler::HandleThumbMove(wxScrollBar *scrollbar,
697 const wxMouseEvent& event)
698 {
699 int thumbPos = GetMouseCoord(scrollbar, event) - m_ofsMouse;
700 thumbPos = m_renderer->PixelToScrollbar(scrollbar, thumbPos);
701 scrollbar->PerformAction(wxACTION_SCROLL_THUMB_MOVE, thumbPos);
702 }
703
704 bool wxStdScrollBarInputHandler::HandleKey(wxInputConsumer *consumer,
705 const wxKeyEvent& event,
706 bool pressed)
707 {
708 // we only react to the key presses here
709 if ( pressed )
710 {
711 wxControlAction action;
712 switch ( event.GetKeyCode() )
713 {
714 case WXK_DOWN:
715 case WXK_RIGHT: action = wxACTION_SCROLL_LINE_DOWN; break;
716 case WXK_UP:
717 case WXK_LEFT: action = wxACTION_SCROLL_LINE_UP; break;
718 case WXK_HOME: action = wxACTION_SCROLL_START; break;
719 case WXK_END: action = wxACTION_SCROLL_END; break;
720 case WXK_PAGEUP: action = wxACTION_SCROLL_PAGE_UP; break;
721 case WXK_PAGEDOWN: action = wxACTION_SCROLL_PAGE_DOWN; break;
722 }
723
724 if ( !action.IsEmpty() )
725 {
726 consumer->PerformAction(action);
727
728 return true;
729 }
730 }
731
732 return wxStdInputHandler::HandleKey(consumer, event, pressed);
733 }
734
735 bool wxStdScrollBarInputHandler::HandleMouse(wxInputConsumer *consumer,
736 const wxMouseEvent& event)
737 {
738 // is this a click event from an acceptable button?
739 int btn = event.GetButton();
740 if ( (btn != -1) && IsAllowedButton(btn) )
741 {
742 // determine which part of the window mouse is in
743 wxScrollBar *scrollbar = wxStaticCast(consumer->GetInputWindow(), wxScrollBar);
744 wxHitTest ht = m_renderer->HitTestScrollbar
745 (
746 scrollbar,
747 event.GetPosition()
748 );
749
750 // when the mouse is pressed on any scrollbar element, we capture it
751 // and hold capture until the same mouse button is released
752 if ( event.ButtonDown() || event.ButtonDClick() )
753 {
754 if ( !m_winCapture )
755 {
756 m_btnCapture = btn;
757 m_winCapture = consumer->GetInputWindow();
758 m_winCapture->CaptureMouse();
759
760 // generate the command
761 bool hasAction = true;
762 wxControlAction action;
763 switch ( ht )
764 {
765 case wxHT_SCROLLBAR_ARROW_LINE_1:
766 action = wxACTION_SCROLL_LINE_UP;
767 break;
768
769 case wxHT_SCROLLBAR_ARROW_LINE_2:
770 action = wxACTION_SCROLL_LINE_DOWN;
771 break;
772
773 case wxHT_SCROLLBAR_BAR_1:
774 action = wxACTION_SCROLL_PAGE_UP;
775 m_ptStartScrolling = event.GetPosition();
776 break;
777
778 case wxHT_SCROLLBAR_BAR_2:
779 action = wxACTION_SCROLL_PAGE_DOWN;
780 m_ptStartScrolling = event.GetPosition();
781 break;
782
783 case wxHT_SCROLLBAR_THUMB:
784 consumer->PerformAction(wxACTION_SCROLL_THUMB_DRAG);
785 m_ofsMouse = GetMouseCoord(scrollbar, event) -
786 m_renderer->ScrollbarToPixel(scrollbar);
787
788 // fall through: there is no immediate action
789
790 default:
791 hasAction = false;
792 }
793
794 // remove highlighting
795 Highlight(scrollbar, false);
796 m_htLast = ht;
797
798 // and press the arrow or highlight thumb now instead
799 if ( m_htLast == wxHT_SCROLLBAR_THUMB )
800 Highlight(scrollbar, true);
801 else
802 Press(scrollbar, true);
803
804 // start dragging
805 if ( hasAction )
806 {
807 m_timerScroll = new wxScrollBarTimer(this, action,
808 scrollbar);
809 m_timerScroll->StartAutoScroll();
810 }
811 //else: no (immediate) action
812
813 }
814 //else: mouse already captured, nothing to do
815 }
816 // release mouse if the *same* button went up
817 else if ( btn == m_btnCapture )
818 {
819 if ( m_winCapture )
820 {
821 StopScrolling(scrollbar);
822
823 // if we were dragging the thumb, send the last event
824 if ( m_htLast == wxHT_SCROLLBAR_THUMB )
825 {
826 scrollbar->PerformAction(wxACTION_SCROLL_THUMB_RELEASE);
827 }
828
829 m_htLast = ht;
830 Highlight(scrollbar, true);
831 }
832 else
833 {
834 // this is not supposed to happen as the button can't go up
835 // without going down previously and then we'd have
836 // m_winCapture by now
837 wxFAIL_MSG( _T("logic error in mouse capturing code") );
838 }
839 }
840 }
841
842 return wxStdInputHandler::HandleMouse(consumer, event);
843 }
844
845 bool wxStdScrollBarInputHandler::HandleMouseMove(wxInputConsumer *consumer,
846 const wxMouseEvent& event)
847 {
848 wxScrollBar *scrollbar = wxStaticCast(consumer->GetInputWindow(), wxScrollBar);
849
850 if ( m_winCapture )
851 {
852 if ( (m_htLast == wxHT_SCROLLBAR_THUMB) && event.Dragging() )
853 {
854 // make the thumb follow the mouse by keeping the same offset
855 // between the mouse position and the top/left of the thumb
856 HandleThumbMove(scrollbar, event);
857
858 return true;
859 }
860
861 // no other changes are possible while the mouse is captured
862 return false;
863 }
864
865 bool isArrow = scrollbar->GetArrows().HandleMouseMove(event);
866
867 if ( event.Dragging() )
868 {
869 wxHitTest ht = m_renderer->HitTestScrollbar
870 (
871 scrollbar,
872 event.GetPosition()
873 );
874 if ( ht == m_htLast )
875 {
876 // nothing changed
877 return false;
878 }
879
880 #ifdef DEBUG_MOUSE
881 wxLogDebug("Scrollbar::OnMouseMove: ht = %d", ht);
882 #endif // DEBUG_MOUSE
883
884 Highlight(scrollbar, false);
885 m_htLast = ht;
886
887 if ( !isArrow )
888 Highlight(scrollbar, true);
889 //else: already done by wxScrollArrows::HandleMouseMove
890 }
891 else if ( event.Leaving() )
892 {
893 if ( !isArrow )
894 Highlight(scrollbar, false);
895
896 m_htLast = wxHT_NOWHERE;
897 }
898 else // event.Entering()
899 {
900 // we don't process this event
901 return false;
902 }
903
904 // we did something
905 return true;
906 }
907
908 #endif // wxUSE_SCROLLBAR
909
910 // ----------------------------------------------------------------------------
911 // wxScrollTimer
912 // ----------------------------------------------------------------------------
913
914 wxScrollTimer::wxScrollTimer()
915 {
916 m_skipNext = false;
917 }
918
919 void wxScrollTimer::StartAutoScroll()
920 {
921 // start scrolling immediately
922 if ( !DoNotify() )
923 {
924 // ... and end it too
925 return;
926 }
927
928 // there is an initial delay before the scrollbar starts scrolling -
929 // implement it by ignoring the first timer expiration and only start
930 // scrolling from the second one
931 m_skipNext = true;
932 Start(200); // FIXME: hardcoded delay
933 }
934
935 void wxScrollTimer::Notify()
936 {
937 if ( m_skipNext )
938 {
939 // scroll normally now - reduce the delay
940 Stop();
941 Start(50); // FIXME: hardcoded delay
942
943 m_skipNext = false;
944 }
945 else
946 {
947 // if DoNotify() returns false, we're already deleted by the timer
948 // event handler, so don't do anything else here
949 (void)DoNotify();
950 }
951 }
wxWidgets (Impactor)