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1/////////////////////////////////////////////////////////////////////////////
2// Name: gtk/scrolwin.cpp
3// Purpose: wxScrolledWindow implementation
4// Author: Julian Smart
5// Modified by:
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_xScrollLines = 0;
206 m_yScrollLines = 0;
207 m_xScrollLinesPerPage = 0;
208 m_yScrollLinesPerPage = 0;
209 m_targetWindow = (wxWindow*) NULL;
210 m_scaleX = 1.0;
211 m_scaleY = 1.0;
212 m_hasScrolling = TRUE;
213}
214
215bool wxScrolledWindow::Create(wxWindow *parent,
216 wxWindowID id,
217 const wxPoint& pos,
218 const wxSize& size,
219 long style,
220 const wxString& name)
221{
222 Init();
223
224 if (!PreCreation( parent, pos, size ) ||
225 !CreateBase( parent, id, pos, size, style, wxDefaultValidator, name ))
226 {
227 wxFAIL_MSG( wxT("wxWindow creation failed") );
228 return FALSE;
229 }
230
231 m_insertCallback = wxInsertChildInScrolledWindow;
232
233 m_targetWindow = this;
234
235 m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
236 GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
237
238 GtkScrolledWindow *scrolledWindow = GTK_SCROLLED_WINDOW(m_widget);
239
240 GtkScrolledWindowClass *scroll_class = GTK_SCROLLED_WINDOW_CLASS( GTK_OBJECT_GET_CLASS(m_widget) );
241 scroll_class->scrollbar_spacing = 0;
242
243 gtk_scrolled_window_set_policy( scrolledWindow, GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
244
245 m_hAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->hscrollbar) );
246 m_vAdjust = gtk_range_get_adjustment( GTK_RANGE(scrolledWindow->vscrollbar) );
247
248 m_wxwindow = gtk_pizza_new();
249
250 gtk_container_add( GTK_CONTAINER(m_widget), m_wxwindow );
251
252 GtkPizza *pizza = GTK_PIZZA(m_wxwindow);
253
254 if (HasFlag(wxRAISED_BORDER))
255 {
256 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_OUT );
257 }
258 else if (HasFlag(wxSUNKEN_BORDER))
259 {
260 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_IN );
261 }
262 else if (HasFlag(wxSIMPLE_BORDER))
263 {
264 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_THIN );
265 }
266 else
267 {
268 gtk_pizza_set_shadow_type( pizza, GTK_MYSHADOW_NONE );
269 }
270
271 GTK_WIDGET_SET_FLAGS( m_wxwindow, GTK_CAN_FOCUS );
272 m_acceptsFocus = TRUE;
273
274 // I _really_ don't want scrollbars in the beginning
275 m_vAdjust->lower = 0.0;
276 m_vAdjust->upper = 1.0;
277 m_vAdjust->value = 0.0;
278 m_vAdjust->step_increment = 1.0;
279 m_vAdjust->page_increment = 1.0;
280 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
281 m_hAdjust->lower = 0.0;
282 m_hAdjust->upper = 1.0;
283 m_hAdjust->value = 0.0;
284 m_hAdjust->step_increment = 1.0;
285 m_hAdjust->page_increment = 1.0;
286 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
287
288 // Handlers for new scrollbar values
289 GtkVConnectEvent();
290 GtkHConnectEvent();
291
292 // these handlers block mouse events to any window during scrolling such as
293 // motion events and prevent GTK and wxWindows from fighting over where the
294 // slider should be
295
296 gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_press_event",
297 (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
298
299 gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_press_event",
300 (GtkSignalFunc)gtk_scrollbar_button_press_callback, (gpointer) this );
301
302 gtk_signal_connect( GTK_OBJECT(scrolledWindow->vscrollbar), "button_release_event",
303 (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
304
305 gtk_signal_connect( GTK_OBJECT(scrolledWindow->hscrollbar), "button_release_event",
306 (GtkSignalFunc)gtk_scrollbar_button_release_callback, (gpointer) this );
307
308 gtk_widget_show( m_wxwindow );
309
310 if (m_parent)
311 m_parent->DoAddChild( this );
312
313 m_focusWidget = m_wxwindow;
314
315 PostCreation();
316
317 Show( TRUE );
318
319 return TRUE;
320}
321
322// ----------------------------------------------------------------------------
323// setting scrolling parameters
324// ----------------------------------------------------------------------------
325
326/*
327 * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
328 * noUnitsX/noUnitsY: : no. units per scrollbar
329 */
330void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY,
331 int noUnitsX, int noUnitsY,
332 int xPos, int yPos, bool noRefresh )
333{
334 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
335 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
336
337 m_xScrollPixelsPerLine = pixelsPerUnitX;
338 m_yScrollPixelsPerLine = pixelsPerUnitY;
339 m_xScrollLines = noUnitsX;
340 m_yScrollLines = noUnitsY;
341 m_xScrollPosition = xPos;
342 m_yScrollPosition = yPos;
343
344 m_hAdjust->lower = 0.0;
345 m_hAdjust->upper = noUnitsX;
346 m_hAdjust->value = xPos;
347 m_hAdjust->step_increment = 1.0;
348 m_hAdjust->page_increment = 2.0;
349
350 m_vAdjust->lower = 0.0;
351 m_vAdjust->upper = noUnitsY;
352 m_vAdjust->value = yPos;
353 m_vAdjust->step_increment = 1.0;
354 m_vAdjust->page_increment = 2.0;
355
356 AdjustScrollbars();
357
358 if (!noRefresh)
359 {
360 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
361 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
362
363 m_targetWindow->ScrollWindow( old_x-new_x, old_y-new_y );
364 }
365}
366
367void wxScrolledWindow::AdjustScrollbars()
368{
369 int w, h;
370 m_targetWindow->GetClientSize( &w, &h );
371
372 if (m_xScrollPixelsPerLine == 0)
373 m_hAdjust->page_size = 1.0;
374 else
375 m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
376
377 if (m_yScrollPixelsPerLine == 0)
378 m_vAdjust->page_size = 1.0;
379 else
380 m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
381
382 m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
383 m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
384
385 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
386 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
387}
388
389// ----------------------------------------------------------------------------
390// target window handling
391// ----------------------------------------------------------------------------
392
393void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
394{
395 wxASSERT_MSG( target, wxT("target window must not be NULL") );
396 m_targetWindow = target;
397}
398
399wxWindow *wxScrolledWindow::GetTargetWindow()
400{
401 return m_targetWindow;
402}
403
404// Override this function if you don't want to have wxScrolledWindow
405// automatically change the origin according to the scroll position.
406void wxScrolledWindow::PrepareDC(wxDC& dc)
407{
408 dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
409 -m_yScrollPosition * m_yScrollPixelsPerLine );
410}
411
412void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
413{
414 if ( x_unit )
415 *x_unit = m_xScrollPixelsPerLine;
416 if ( y_unit )
417 *y_unit = m_yScrollPixelsPerLine;
418}
419
420int wxScrolledWindow::GetScrollPageSize(int orient) const
421{
422 if ( orient == wxHORIZONTAL )
423 return m_xScrollLinesPerPage;
424 else
425 return m_yScrollLinesPerPage;
426}
427
428void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
429{
430 if ( orient == wxHORIZONTAL )
431 m_xScrollLinesPerPage = pageSize;
432 else
433 m_yScrollLinesPerPage = pageSize;
434}
435
436void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
437{
438 int orient = event.GetOrientation();
439
440 int nScrollInc = CalcScrollInc(event);
441 if (nScrollInc == 0) return;
442
443 if (orient == wxHORIZONTAL)
444 {
445 int newPos = m_xScrollPosition + nScrollInc;
446 SetScrollPos(wxHORIZONTAL, newPos, TRUE );
447 }
448 else
449 {
450 int newPos = m_yScrollPosition + nScrollInc;
451 SetScrollPos(wxVERTICAL, newPos, TRUE );
452 }
453
454 if (orient == wxHORIZONTAL)
455 {
456 m_xScrollPosition += nScrollInc;
457 }
458 else
459 {
460 m_yScrollPosition += nScrollInc;
461 }
462
463 if (orient == wxHORIZONTAL)
464 {
465 if (m_xScrollingEnabled)
466 m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
467 else
468 m_targetWindow->Refresh();
469 }
470 else
471 {
472 if (m_yScrollingEnabled)
473 m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
474 else
475 m_targetWindow->Refresh();
476 }
477}
478
479void wxScrolledWindow::Scroll( int x_pos, int y_pos )
480{
481 if (!m_targetWindow)
482 return;
483
484 if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
485 ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
486
487 if ((x_pos != -1) && (m_xScrollPixelsPerLine))
488 {
489 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
490 if (max < 0) max = 0;
491 if (x_pos > max) x_pos = max;
492 if (x_pos < 0) x_pos = 0;
493
494 int old_x = m_xScrollPosition;
495 m_xScrollPosition = x_pos;
496 m_hAdjust->value = x_pos;
497
498 m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
499
500 // Just update the scrollbar, don't send any wxWindows event
501 GtkHDisconnectEvent();
502 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
503 GtkHConnectEvent();
504 }
505
506 if ((y_pos != -1) && (m_yScrollPixelsPerLine))
507 {
508 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
509 if (max < 0) max = 0;
510 if (y_pos > max) y_pos = max;
511 if (y_pos < 0) y_pos = 0;
512
513 int old_y = m_yScrollPosition;
514 m_yScrollPosition = y_pos;
515 m_vAdjust->value = y_pos;
516
517 m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
518
519 // Just update the scrollbar, don't send any wxWindows event
520 GtkVDisconnectEvent();
521 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
522 GtkVConnectEvent();
523 }
524}
525
526// TODO: [VH]Scroll functions should be combined
527
528void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
529{
530 if (!m_targetWindow)
531 return;
532
533 if (m_yScrollPixelsPerLine == 0)
534 return;
535
536 int y_pos = (int)(value+0.5);
537
538 if (y_pos == m_yScrollPosition)
539 return;
540
541 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
542
543 wxScrollWinEvent event( command, y_pos, wxVERTICAL );
544 event.SetEventObject( this );
545 GetEventHandler()->ProcessEvent( event );
546}
547
548void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
549{
550 if (!m_targetWindow)
551 return;
552
553 if (m_xScrollPixelsPerLine == 0)
554 return;
555
556 int x_pos = (int)(value+0.5);
557
558 if (x_pos == m_xScrollPosition)
559 return;
560
561 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
562
563 wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
564 event.SetEventObject( this );
565 GetEventHandler()->ProcessEvent( event );
566}
567
568void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
569{
570 m_xScrollingEnabled = x_scroll;
571 m_yScrollingEnabled = y_scroll;
572}
573
574void wxScrolledWindow::GetVirtualSize (int *x, int *y) const
575{
576 if ( x )
577 *x = m_xScrollPixelsPerLine * m_xScrollLines;
578 if ( y )
579 *y = m_yScrollPixelsPerLine * m_yScrollLines;
580}
581
582// Where the current view starts from
583void wxScrolledWindow::GetViewStart (int *x, int *y) const
584{
585 if ( x )
586 *x = m_xScrollPosition;
587 if ( y )
588 *y = m_yScrollPosition;
589}
590
591void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
592{
593 if ( xx )
594 *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
595 if ( yy )
596 *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
597}
598
599void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
600{
601 if ( xx )
602 *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
603 if ( yy )
604 *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
605}
606
607int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
608{
609 int pos = event.GetPosition();
610 int orient = event.GetOrientation();
611
612 int nScrollInc = 0;
613 if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
614 {
615 if (orient == wxHORIZONTAL)
616 nScrollInc = - m_xScrollPosition;
617 else
618 nScrollInc = - m_yScrollPosition;
619 } else
620 if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
621 {
622 if (orient == wxHORIZONTAL)
623 nScrollInc = m_xScrollLines - m_xScrollPosition;
624 else
625 nScrollInc = m_yScrollLines - m_yScrollPosition;
626 } else
627 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
628 {
629 nScrollInc = -1;
630 } else
631 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
632 {
633 nScrollInc = 1;
634 } else
635 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
636 {
637 if (orient == wxHORIZONTAL)
638 nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
639 else
640 nScrollInc = -GetScrollPageSize(wxVERTICAL);
641 } else
642 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
643 {
644 if (orient == wxHORIZONTAL)
645 nScrollInc = GetScrollPageSize(wxHORIZONTAL);
646 else
647 nScrollInc = GetScrollPageSize(wxVERTICAL);
648 } else
649 if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
650 (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
651 {
652 if (orient == wxHORIZONTAL)
653 nScrollInc = pos - m_xScrollPosition;
654 else
655 nScrollInc = pos - m_yScrollPosition;
656 }
657
658 if (orient == wxHORIZONTAL)
659 {
660 if (m_xScrollPixelsPerLine > 0)
661 {
662 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
663 if (max < 0) max = 0;
664
665 if ( (m_xScrollPosition + nScrollInc) < 0 )
666 nScrollInc = -m_xScrollPosition; // As -ve as we can go
667 else if ( (m_xScrollPosition + nScrollInc) > max )
668 nScrollInc = max - m_xScrollPosition; // As +ve as we can go
669 }
670 else
671 m_targetWindow->Refresh();
672 }
673 else
674 {
675 if (m_yScrollPixelsPerLine > 0)
676 {
677 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
678 if (max < 0) max = 0;
679
680 if ( (m_yScrollPosition + nScrollInc) < 0 )
681 nScrollInc = -m_yScrollPosition; // As -ve as we can go
682 else if ( (m_yScrollPosition + nScrollInc) > max )
683 nScrollInc = max - m_yScrollPosition; // As +ve as we can go
684 }
685 else
686 m_targetWindow->Refresh();
687 }
688
689 return nScrollInc;
690}
691
692void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
693{
694 wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
695
696 wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
697
698 if (orient == wxHORIZONTAL)
699 {
700 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
701 if (max < 0) max = 0;
702
703 if (pos > max) pos = 0;
704 if (pos < 0) pos = 0;
705
706 if (pos == (int)(m_hAdjust->value+0.5)) return;
707 m_hAdjust->value = pos;
708 }
709 else
710 {
711 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
712 if (max < 0) max = 0;
713
714 if (pos > max) pos = 0;
715 if (pos < 0) pos = 0;
716
717 if (pos == (int)(m_vAdjust->value+0.5)) return;
718 m_vAdjust->value = pos;
719 }
720
721 if (m_wxwindow->window)
722 {
723 if (orient == wxHORIZONTAL)
724 {
725 // Just update the scrollbar, don't send any wxWindows event
726 GtkHDisconnectEvent();
727 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
728 GtkHConnectEvent();
729 }
730 else
731 {
732 // Just update the scrollbar, don't send any wxWindows event
733 GtkVDisconnectEvent();
734 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
735 GtkVConnectEvent();
736 }
737 }
738}
739
740void wxScrolledWindow::GtkVConnectEvent()
741{
742 gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
743 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
744}
745
746void wxScrolledWindow::GtkHConnectEvent()
747{
748 gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
749 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
750}
751
752void wxScrolledWindow::GtkHDisconnectEvent()
753{
754 gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
755 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
756}
757
758void wxScrolledWindow::GtkVDisconnectEvent()
759{
760 gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
761 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
762}
763
764
765bool wxScrolledWindow::Layout()
766{
767 if (GetSizer())
768 {
769 // Take into account the virtual size and scrolled position of the window
770 int x, y, w, h;
771 CalcScrolledPosition(0,0, &x,&y);
772 GetVirtualSize(&w, &h);
773 GetSizer()->SetDimension(x, y, w, h);
774 return TRUE;
775 }
776 else
777 return wxPanel::Layout(); // fall back to default for LayoutConstraints
778}
779
780// ----------------------------------------------------------------------------
781// event handlers
782// ----------------------------------------------------------------------------
783
784// Default OnSize resets scrollbars, if any
785void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
786{
787#if wxUSE_CONSTRAINTS
788 if (GetAutoLayout())
789 Layout();
790#endif
791
792 AdjustScrollbars();
793}
794
795// This calls OnDraw, having adjusted the origin according to the current
796// scroll position
797void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
798{
799 wxPaintDC dc(this);
800 PrepareDC(dc);
801
802 OnDraw(dc);
803}
804
805// kbd handling: notice that we use OnChar() and not OnKeyDown() for
806// compatibility here - if we used OnKeyDown(), the programs which process
807// arrows themselves in their OnChar() would never get the message and like
808// this they always have the priority
809void wxScrolledWindow::OnChar(wxKeyEvent& event)
810{
811 int stx, sty, // view origin
812 szx, szy, // view size (total)
813 clix, cliy; // view size (on screen)
814
815 ViewStart(&stx, &sty);
816 GetClientSize(&clix, &cliy);
817 GetVirtualSize(&szx, &szy);
818
819 if( m_xScrollPixelsPerLine )
820 {
821 clix /= m_xScrollPixelsPerLine;
822 szx /= m_xScrollPixelsPerLine;
823 }
824 else
825 {
826 clix = 0;
827 szx = -1;
828 }
829 if( m_yScrollPixelsPerLine )
830 {
831 cliy /= m_yScrollPixelsPerLine;
832 szy /= m_yScrollPixelsPerLine;
833 }
834 else
835 {
836 cliy = 0;
837 szy = -1;
838 }
839
840 int xScrollOld = GetScrollPos(wxHORIZONTAL),
841 yScrollOld = GetScrollPos(wxVERTICAL);
842
843 int dsty;
844 switch ( event.KeyCode() )
845 {
846 case WXK_PAGEUP:
847 case WXK_PRIOR:
848 dsty = sty - (5 * cliy / 6);
849 Scroll(-1, (dsty == -1) ? 0 : dsty);
850 break;
851
852 case WXK_PAGEDOWN:
853 case WXK_NEXT:
854 Scroll(-1, sty + (5 * cliy / 6));
855 break;
856
857 case WXK_HOME:
858 Scroll(0, event.ControlDown() ? 0 : -1);
859 break;
860
861 case WXK_END:
862 Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
863 break;
864
865 case WXK_UP:
866 Scroll(-1, sty - 1);
867 break;
868
869 case WXK_DOWN:
870 Scroll(-1, sty + 1);
871 break;
872
873 case WXK_LEFT:
874 Scroll(stx - 1, -1);
875 break;
876
877 case WXK_RIGHT:
878 Scroll(stx + 1, -1);
879 break;
880
881 default:
882 // not for us
883 event.Skip();
884 return;
885 }
886
887 int xScroll = GetScrollPos(wxHORIZONTAL);
888 if ( xScroll != xScrollOld )
889 {
890 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll,
891 wxHORIZONTAL);
892 event.SetEventObject(this);
893 GetEventHandler()->ProcessEvent(event);
894 }
895
896 int yScroll = GetScrollPos(wxVERTICAL);
897 if ( yScroll != yScrollOld )
898 {
899 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll,
900 wxVERTICAL);
901 event.SetEventObject(this);
902 GetEventHandler()->ProcessEvent(event);
903 }
904}
905
wxWidgets (Impactor)