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1/////////////////////////////////////////////////////////////////////////////
2// Name: gtk/scrolwin.cpp
3// Purpose: wxScrolledWindow implementation
4// Author: Julian Smart
5// Modified by: Ron Lee
6// Created: 01/02/97
7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart and Markus Holzem
9// Licence: wxWindows license
10/////////////////////////////////////////////////////////////////////////////
11
12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
20#ifdef __GNUG__
21 #pragma implementation "scrolwin.h"
22#endif
23
24// For compilers that support precompilation, includes "wx.h".
25#include "wx/wxprec.h"
26
27#ifdef __BORLANDC__
28 #pragma hdrstop
29#endif
30
31#include "wx/utils.h"
32#include "wx/dcclient.h"
33
34#include "wx/scrolwin.h"
35#include "wx/panel.h"
36#include "wx/sizer.h"
37
38#include "wx/gtk/private.h"
39#include "wx/gtk/win_gtk.h"
40
41// ----------------------------------------------------------------------------
42// event tables
43// ----------------------------------------------------------------------------
44
45BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel)
46 EVT_SCROLLWIN(wxScrolledWindow::OnScroll)
47 EVT_SIZE(wxScrolledWindow::OnSize)
48 EVT_PAINT(wxScrolledWindow::OnPaint)
49 EVT_CHAR(wxScrolledWindow::OnChar)
50END_EVENT_TABLE()
51
52IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel)
53
54// ============================================================================
55// implementation
56// ============================================================================
57
58//-----------------------------------------------------------------------------
59// data
60//-----------------------------------------------------------------------------
61
62extern bool g_blockEventsOnDrag;
63extern bool g_blockEventsOnScroll;
64
65//-----------------------------------------------------------------------------
66// idle system
67//-----------------------------------------------------------------------------
68
69extern void wxapp_install_idle_handler();
70extern bool g_isIdle;
71
72//-----------------------------------------------------------------------------
73// "value_changed" from m_vAdjust
74//-----------------------------------------------------------------------------
75
76static void gtk_scrolled_window_vscroll_callback( GtkAdjustment *adjust,
77 SCROLLBAR_CBACK_ARG
78 wxScrolledWindow *win )
79{
80 if (g_isIdle)
81 wxapp_install_idle_handler();
82
83 if (g_blockEventsOnDrag) return;
84
85 if (!win->m_hasVMT) return;
86
87 win->GtkVScroll( adjust->value,
88 GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->vscrollbar) );
89}
90
91//-----------------------------------------------------------------------------
92// "value_changed" from m_hAdjust
93//-----------------------------------------------------------------------------
94
95static void gtk_scrolled_window_hscroll_callback( GtkAdjustment *adjust,
96 SCROLLBAR_CBACK_ARG
97 wxScrolledWindow *win )
98{
99 if (g_isIdle)
100 wxapp_install_idle_handler();
101
102 if (g_blockEventsOnDrag) return;
103 if (!win->m_hasVMT) return;
104
105 win->GtkHScroll( adjust->value,
106 GET_SCROLL_TYPE(GTK_SCROLLED_WINDOW(win->m_widget)->hscrollbar) );
107}
108
109//-----------------------------------------------------------------------------
110// "button_press_event" from scrollbar
111//-----------------------------------------------------------------------------
112
113static gint gtk_scrollbar_button_press_callback( GtkRange *widget,
114 GdkEventButton *gdk_event,
115 wxWindowGTK *win)
116{
117 if (g_isIdle)
118 wxapp_install_idle_handler();
119
120 g_blockEventsOnScroll = TRUE;
121
122 // FIXME: there is no slider field any more, what was meant here?
123#ifndef __WXGTK20__
124 win->m_isScrolling = (gdk_event->window == widget->slider);
125#endif
126
127 return FALSE;
128}
129
130//-----------------------------------------------------------------------------
131// "button_release_event" from scrollbar
132//-----------------------------------------------------------------------------
133
134static gint gtk_scrollbar_button_release_callback( GtkRange *widget,
135 GdkEventButton *WXUNUSED(gdk_event),
136 wxWindowGTK *win)
137{
138// don't test here as we can release the mouse while being over
139// a different window than the slider
140//
141// if (gdk_event->window != widget->slider) return FALSE;
142
143 g_blockEventsOnScroll = FALSE;
144
145 if (win->m_isScrolling)
146 {
147 wxEventType command = wxEVT_SCROLLWIN_THUMBRELEASE;
148 int value = -1;
149 int dir = -1;
150
151 GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(win->m_widget);
152 if (widget == GTK_RANGE(scrolledWindow->hscrollbar))
153 {
154 value = (int)(win->m_hAdjust->value+0.5);
155 dir = wxHORIZONTAL;
156 }
157 if (widget == GTK_RANGE(scrolledWindow->vscrollbar))
158 {
159 value = (int)(win->m_vAdjust->value+0.5);
160 dir = wxVERTICAL;
161 }
162
163 wxScrollWinEvent event( command, value, dir );
164 event.SetEventObject( win );
165 win->GetEventHandler()->ProcessEvent( event );
166 }
167
168 win->m_isScrolling = FALSE;
169
170 return FALSE;
171}
172
173//-----------------------------------------------------------------------------
174// InsertChild for wxScrolledWindow
175//-----------------------------------------------------------------------------
176
177static void wxInsertChildInScrolledWindow( wxWindow* parent, wxWindow* child )
178{
179 // The window might have been scrolled already, do we
180 // have to adapt the position.
181 GtkPizza *pizza = GTK_PIZZA(parent->m_wxwindow);
182 child->m_x += pizza->xoffset;
183 child->m_y += pizza->yoffset;
184
185 gtk_pizza_put( GTK_PIZZA(parent->m_wxwindow),
186 GTK_WIDGET(child->m_widget),
187 child->m_x,
188 child->m_y,
189 child->m_width,
190 child->m_height );
191}
192
193// ----------------------------------------------------------------------------
194// wxScrolledWindow creation
195// ----------------------------------------------------------------------------
196
197void wxScrolledWindow::Init()
198{
199 m_xScrollPixelsPerLine = 0;
200 m_yScrollPixelsPerLine = 0;
201 m_xScrollingEnabled = TRUE;
202 m_yScrollingEnabled = TRUE;
203 m_xScrollPosition = 0;
204 m_yScrollPosition = 0;
205 m_xScrollLinesPerPage = 0;
206 m_yScrollLinesPerPage = 0;
207 m_targetWindow = (wxWindow*) NULL;
208 m_scaleX = 1.0;
209 m_scaleY = 1.0;
210 m_hasScrolling = TRUE;
211}
212
213bool wxScrolledWindow::Create(wxWindow *parent,
214 wxWindowID id,
215 const wxPoint& pos,
216 const wxSize& size,
217 long style,
218 const wxString& name)
219{
220 Init();
221
222 if (!PreCreation( parent, pos, size ) ||
223 !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
224 {
225 wxFAIL_MSG( wxT("wxWindow creation failed") );
226 return FALSE;
227 }
228
229 m_insertCallback = wxInsertChildInScrolledWindow;
230
231 m_targetWindow = this;
232
233 m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
234 GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
235
236 GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
237
238 GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) );
239 scroll_class->scrollbar_spacing = 0;
240
241 gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
242
243 m_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) );
244 m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) );
245
246 m_wxwindow = gtk_pizza_new();
247
248 gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
249
250 GtkPizza *pizza = GTK_PIZZA(m_wxwindow);
251
252 if (HasFlag(wxRAISED_BORDER))
253 {
254 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT );
255 }
256 else if (HasFlag(wxSUNKEN_BORDER))
257 {
258 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN );
259 }
260 else if (HasFlag(wxSIMPLE_BORDER))
261 {
262 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN );
263 }
264 else
265 {
266 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE );
267 }
268
269 GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
270 m_acceptsFocus = TRUE;
271
272 // I _really_ don't want scrollbars in the beginning
273 m_vAdjust->lower = 0.0;
274 m_vAdjust->upper = 1.0;
275 m_vAdjust->value = 0.0;
276 m_vAdjust->step_increment = 1.0;
277 m_vAdjust->page_increment = 2.0;
278 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
279 m_hAdjust->lower = 0.0;
280 m_hAdjust->upper = 1.0;
281 m_hAdjust->value = 0.0;
282 m_hAdjust->step_increment = 1.0;
283 m_hAdjust->page_increment = 2.0;
284 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
285
286 // Handlers for new scrollbar values
287 GtkVConnectEvent();
288 GtkHConnectEvent();
289
290 // these handlers block mouse events to any window during scrolling such as
291 // motion events and prevent GTK and wxWindows from fighting over where the
292 // slider should be
293
294 gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_press_event",
295 (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
296
297 gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_press_event",
298 (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
299
300 gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_release_event",
301 (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
302
303 gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_release_event",
304 (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
305
306 gtk_widget_show( m_wxwindow );
307
308 if (m_parent)
309 m_parent->DoAddChild( this );
310
311 m_focusWidget = m_wxwindow;
312
313 PostCreation();
314
315 Show( TRUE );
316
317 return TRUE;
318}
319
320// ----------------------------------------------------------------------------
321// setting scrolling parameters
322// ----------------------------------------------------------------------------
323
324void wxScrolledWindow::DoSetVirtualSize( int x, int y )
325{
326 wxPanel::DoSetVirtualSize( x, y );
327 AdjustScrollbars();
328}
329
330/*
331 * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
332 * noUnitsX/noUnitsY: : no. units per scrollbar
333 */
334void wxScrolledWindow::SetScrollbars( int pixelsPerUnitX, int pixelsPerUnitY,
335 int noUnitsX, int noUnitsY,
336 int xPos, int yPos, bool noRefresh )
337{
338 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
339 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
340
341 m_xScrollPixelsPerLine = pixelsPerUnitX;
342 m_yScrollPixelsPerLine = pixelsPerUnitY;
343
344 m_hAdjust->value = m_xScrollPosition = xPos;
345 m_vAdjust->value = m_yScrollPosition = yPos;
346
347 m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
348
349 if (!noRefresh)
350 {
351 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
352 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
353
354 m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
355 }
356}
357
358void wxScrolledWindow::AdjustScrollbars()
359{
360 int w, h;
361 int vw, vh;
362
363 m_targetWindow->GetClientSize( &w, &h );
364 m_targetWindow->GetVirtualSize( &vw, &vh );
365
366 if (m_xScrollPixelsPerLine == 0)
367 {
368 m_hAdjust->upper = 1.0;
369 m_hAdjust->page_size = 1.0;
370 }
371 else
372 {
373 m_hAdjust->upper = vw / m_xScrollPixelsPerLine;
374 m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
375
376 // If the scrollbar hits the right side, move the window
377 // right to keep it from over extending.
378
379 if( m_hAdjust->value + m_hAdjust->page_size > m_hAdjust->upper )
380 {
381 m_hAdjust->value = m_hAdjust->upper - m_hAdjust->page_size;
382 m_xScrollPosition = (int)m_hAdjust->value;
383 }
384 }
385
386 if (m_yScrollPixelsPerLine == 0)
387 {
388 m_vAdjust->upper = 1.0;
389 m_vAdjust->page_size = 1.0;
390 }
391 else
392 {
393 m_vAdjust->upper = vh / m_yScrollPixelsPerLine;
394 m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
395
396 if( m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper )
397 {
398 m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size;
399 m_yScrollPosition = (int)m_vAdjust->value;
400 }
401 }
402
403 m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
404 m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
405
406 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
407 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
408}
409
410
411// ----------------------------------------------------------------------------
412// target window handling
413// ----------------------------------------------------------------------------
414
415void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
416{
417 wxASSERT_MSG( target, wxT("target window must not be NULL") );
418 m_targetWindow = target;
419}
420
421wxWindow *wxScrolledWindow::GetTargetWindow()
422{
423 return m_targetWindow;
424}
425
426// Override this function if you don't want to have wxScrolledWindow
427// automatically change the origin according to the scroll position.
428void wxScrolledWindow::PrepareDC(wxDC& dc)
429{
430 dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
431 -m_yScrollPosition * m_yScrollPixelsPerLine );
432}
433
434void wxScrolledWindow::SetScrollRate( int xstep, int ystep )
435{
436 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
437 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
438
439 m_xScrollPixelsPerLine = xstep;
440 m_yScrollPixelsPerLine = ystep;
441
442 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
443 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
444
445 m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
446
447 AdjustScrollbars();
448}
449
450void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
451{
452 if ( x_unit )
453 *x_unit = m_xScrollPixelsPerLine;
454 if ( y_unit )
455 *y_unit = m_yScrollPixelsPerLine;
456}
457
458int wxScrolledWindow::GetScrollPageSize(int orient) const
459{
460 if ( orient == wxHORIZONTAL )
461 return m_xScrollLinesPerPage;
462 else
463 return m_yScrollLinesPerPage;
464}
465
466void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
467{
468 if ( orient == wxHORIZONTAL )
469 m_xScrollLinesPerPage = pageSize;
470 else
471 m_yScrollLinesPerPage = pageSize;
472}
473
474void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
475{
476 int orient = event.GetOrientation();
477
478 int nScrollInc = CalcScrollInc(event);
479 if (nScrollInc == 0) return;
480
481 if (orient == wxHORIZONTAL)
482 {
483 int newPos = m_xScrollPosition + nScrollInc;
484 SetScrollPos(wxHORIZONTAL, newPos, TRUE );
485 }
486 else
487 {
488 int newPos = m_yScrollPosition + nScrollInc;
489 SetScrollPos(wxVERTICAL, newPos, TRUE );
490 }
491
492 if (orient == wxHORIZONTAL)
493 {
494 m_xScrollPosition += nScrollInc;
495 }
496 else
497 {
498 m_yScrollPosition += nScrollInc;
499 }
500
501 if (orient == wxHORIZONTAL)
502 {
503 if (m_xScrollingEnabled)
504 m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
505 else
506 m_targetWindow->Refresh();
507 }
508 else
509 {
510 if (m_yScrollingEnabled)
511 m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
512 else
513 m_targetWindow->Refresh();
514 }
515}
516
517void wxScrolledWindow::Scroll( int x_pos, int y_pos )
518{
519 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
520
521 if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
522 ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
523
524 if ((x_pos != -1) && (m_xScrollPixelsPerLine))
525 {
526 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
527 if (max < 0) max = 0;
528 if (x_pos > max) x_pos = max;
529 if (x_pos < 0) x_pos = 0;
530
531 int old_x = m_xScrollPosition;
532 m_xScrollPosition = x_pos;
533 m_hAdjust->value = x_pos;
534
535 m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
536
537 // Just update the scrollbar, don't send any wxWindows event
538 GtkHDisconnectEvent();
539 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
540 GtkHConnectEvent();
541 }
542
543 if ((y_pos != -1) && (m_yScrollPixelsPerLine))
544 {
545 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
546 if (max < 0) max = 0;
547 if (y_pos > max) y_pos = max;
548 if (y_pos < 0) y_pos = 0;
549
550 int old_y = m_yScrollPosition;
551 m_yScrollPosition = y_pos;
552 m_vAdjust->value = y_pos;
553
554 m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
555
556 // Just update the scrollbar, don't send any wxWindows event
557 GtkVDisconnectEvent();
558 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
559 GtkVConnectEvent();
560 }
561}
562
563// TODO: [VH]Scroll functions should be combined
564
565void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
566{
567 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
568
569 if (m_yScrollPixelsPerLine == 0)
570 return;
571
572 int y_pos = (int)(value+0.5);
573
574 if (y_pos == m_yScrollPosition)
575 return;
576
577 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
578
579 wxScrollWinEvent event( command, y_pos, wxVERTICAL );
580 event.SetEventObject( this );
581 GetEventHandler()->ProcessEvent( event );
582}
583
584void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
585{
586 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
587
588 if (m_xScrollPixelsPerLine == 0)
589 return;
590
591 int x_pos = (int)(value+0.5);
592
593 if (x_pos == m_xScrollPosition)
594 return;
595
596 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
597
598 wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
599 event.SetEventObject( this );
600 GetEventHandler()->ProcessEvent( event );
601}
602
603void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
604{
605 m_xScrollingEnabled = x_scroll;
606 m_yScrollingEnabled = y_scroll;
607}
608
609// Where the current view starts from
610void wxScrolledWindow::GetViewStart (int *x, int *y) const
611{
612 if ( x )
613 *x = m_xScrollPosition;
614 if ( y )
615 *y = m_yScrollPosition;
616}
617
618void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
619{
620 if ( xx )
621 *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
622 if ( yy )
623 *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
624}
625
626void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
627{
628 if ( xx )
629 *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
630 if ( yy )
631 *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
632}
633
634int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
635{
636 int pos = event.GetPosition();
637 int orient = event.GetOrientation();
638
639 int nScrollInc = 0;
640 if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
641 {
642 if (orient == wxHORIZONTAL)
643 nScrollInc = - m_xScrollPosition;
644 else
645 nScrollInc = - m_yScrollPosition;
646 } else
647 if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
648 {
649 if (orient == wxHORIZONTAL)
650 nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
651 else
652 nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
653 } else
654 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
655 {
656 nScrollInc = -1;
657 } else
658 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
659 {
660 nScrollInc = 1;
661 } else
662 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
663 {
664 if (orient == wxHORIZONTAL)
665 nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
666 else
667 nScrollInc = -GetScrollPageSize(wxVERTICAL);
668 } else
669 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
670 {
671 if (orient == wxHORIZONTAL)
672 nScrollInc = GetScrollPageSize(wxHORIZONTAL);
673 else
674 nScrollInc = GetScrollPageSize(wxVERTICAL);
675 } else
676 if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
677 (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
678 {
679 if (orient == wxHORIZONTAL)
680 nScrollInc = pos - m_xScrollPosition;
681 else
682 nScrollInc = pos - m_yScrollPosition;
683 }
684
685 if (orient == wxHORIZONTAL)
686 {
687 if (m_xScrollPixelsPerLine > 0)
688 {
689 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
690 if (max < 0) max = 0;
691
692 if ( (m_xScrollPosition + nScrollInc) < 0 )
693 nScrollInc = -m_xScrollPosition; // As -ve as we can go
694 else if ( (m_xScrollPosition + nScrollInc) > max )
695 nScrollInc = max - m_xScrollPosition; // As +ve as we can go
696 }
697 else
698 m_targetWindow->Refresh();
699 }
700 else
701 {
702 if (m_yScrollPixelsPerLine > 0)
703 {
704 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
705 if (max < 0) max = 0;
706
707 if ( (m_yScrollPosition + nScrollInc) < 0 )
708 nScrollInc = -m_yScrollPosition; // As -ve as we can go
709 else if ( (m_yScrollPosition + nScrollInc) > max )
710 nScrollInc = max - m_yScrollPosition; // As +ve as we can go
711 }
712 else
713 m_targetWindow->Refresh();
714 }
715
716 return nScrollInc;
717}
718
719void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
720{
721 wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
722
723 wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
724
725 if (orient == wxHORIZONTAL)
726 {
727 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
728 if (max < 0) max = 0;
729
730 if (pos > max) pos = 0;
731 if (pos < 0) pos = 0;
732
733 if (pos == (int)(m_hAdjust->value+0.5)) return;
734 m_hAdjust->value = pos;
735 }
736 else
737 {
738 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
739 if (max < 0) max = 0;
740
741 if (pos > max) pos = 0;
742 if (pos < 0) pos = 0;
743
744 if (pos == (int)(m_vAdjust->value+0.5)) return;
745 m_vAdjust->value = pos;
746 }
747
748 if (m_wxwindow->window)
749 {
750 if (orient == wxHORIZONTAL)
751 {
752 // Just update the scrollbar, don't send any wxWindows event
753 GtkHDisconnectEvent();
754 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
755 GtkHConnectEvent();
756 }
757 else
758 {
759 // Just update the scrollbar, don't send any wxWindows event
760 GtkVDisconnectEvent();
761 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
762 GtkVConnectEvent();
763 }
764 }
765}
766
767void wxScrolledWindow::GtkVConnectEvent()
768{
769 gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
770 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
771}
772
773void wxScrolledWindow::GtkHConnectEvent()
774{
775 gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
776 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
777}
778
779void wxScrolledWindow::GtkHDisconnectEvent()
780{
781 gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
782 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
783}
784
785void wxScrolledWindow::GtkVDisconnectEvent()
786{
787 gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
788 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
789}
790
791bool wxScrolledWindow::Layout()
792{
793 if (GetSizer() && m_targetWindow == this)
794 {
795 // If we're the scroll target, take into account the
796 // virtual size and scrolled position of the window.
797
798 int x, y, w, h;
799 CalcScrolledPosition(0,0, &x,&y);
800 GetVirtualSize(&w, &h);
801 GetSizer()->SetDimension(x, y, w, h);
802 return TRUE;
803 }
804 else
805 return wxPanel::Layout(); // fall back to default for LayoutConstraints
806}
807
808// ----------------------------------------------------------------------------
809// event handlers
810// ----------------------------------------------------------------------------
811
812// Default OnSize resets scrollbars, if any
813void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
814{
815 if( m_targetWindow != this )
816 m_targetWindow->SetVirtualSize( m_targetWindow->GetClientSize() );
817
818 SetVirtualSize( GetClientSize() );
819
820#if wxUSE_CONSTRAINTS
821 if (GetAutoLayout())
822 Layout();
823#endif
824}
825
826// This calls OnDraw, having adjusted the origin according to the current
827// scroll position
828void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
829{
830 wxPaintDC dc(this);
831 PrepareDC(dc);
832
833 OnDraw(dc);
834}
835
836// kbd handling: notice that we use OnChar() and not OnKeyDown() for
837// compatibility here - if we used OnKeyDown(), the programs which process
838// arrows themselves in their OnChar() would never get the message and like
839// this they always have the priority
840void wxScrolledWindow::OnChar(wxKeyEvent& event)
841{
842 int stx, sty, // view origin
843 szx, szy, // view size (total)
844 clix, cliy; // view size (on screen)
845
846 ViewStart(&stx, &sty);
847 GetClientSize(&clix, &cliy);
848 GetVirtualSize(&szx, &szy);
849
850 if( m_xScrollPixelsPerLine )
851 {
852 clix /= m_xScrollPixelsPerLine;
853 szx /= m_xScrollPixelsPerLine;
854 }
855 else
856 {
857 clix = 0;
858 szx = -1;
859 }
860 if( m_yScrollPixelsPerLine )
861 {
862 cliy /= m_yScrollPixelsPerLine;
863 szy /= m_yScrollPixelsPerLine;
864 }
865 else
866 {
867 cliy = 0;
868 szy = -1;
869 }
870
871 int xScrollOld = GetScrollPos(wxHORIZONTAL),
872 yScrollOld = GetScrollPos(wxVERTICAL);
873
874 int dsty;
875 switch ( event.KeyCode() )
876 {
877 case WXK_PAGEUP:
878 case WXK_PRIOR:
879 dsty = sty - (5 * cliy / 6);
880 Scroll(-1, (dsty == -1) ? 0 : dsty);
881 break;
882
883 case WXK_PAGEDOWN:
884 case WXK_NEXT:
885 Scroll(-1, sty + (5 * cliy / 6));
886 break;
887
888 case WXK_HOME:
889 Scroll(0, event.ControlDown() ? 0 : -1);
890 break;
891
892 case WXK_END:
893 Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
894 break;
895
896 case WXK_UP:
897 Scroll(-1, sty - 1);
898 break;
899
900 case WXK_DOWN:
901 Scroll(-1, sty + 1);
902 break;
903
904 case WXK_LEFT:
905 Scroll(stx - 1, -1);
906 break;
907
908 case WXK_RIGHT:
909 Scroll(stx + 1, -1);
910 break;
911
912 default:
913 // not for us
914 event.Skip();
915 return;
916 }
917
918 int xScroll = GetScrollPos(wxHORIZONTAL);
919 if ( xScroll != xScrollOld )
920 {
921 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll,
922 wxHORIZONTAL);
923 event.SetEventObject(this);
924 GetEventHandler()->ProcessEvent(event);
925 }
926
927 int yScroll = GetScrollPos(wxVERTICAL);
928 if ( yScroll != yScrollOld )
929 {
930 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll,
931 wxVERTICAL);
932 event.SetEventObject(this);
933 GetEventHandler()->ProcessEvent(event);
934 }
935}
936
937
938// vi:sts=4:sw=4:et
wxWidgets (Impactor)