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[wxWidgets.git] / src / gtk1 / scrolwin.cpp
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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_targetWindow->ScrollWindow( (m_xScrollPosition - m_hAdjust->value) * m_xScrollPixelsPerLine, 0 );
383 m_xScrollPosition = (int)m_hAdjust->value;
384 }
385 }
386
387 if (m_yScrollPixelsPerLine == 0)
388 {
389 m_vAdjust->upper = 1.0;
390 m_vAdjust->page_size = 1.0;
391 }
392 else
393 {
394 m_vAdjust->upper = vh / m_yScrollPixelsPerLine;
395 m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
396
397 if( m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper )
398 {
399 m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size;
400 m_targetWindow->ScrollWindow( 0, (m_yScrollPosition - m_vAdjust->value) * m_yScrollPixelsPerLine );
401 m_yScrollPosition = (int)m_vAdjust->value;
402 }
403 }
404
405 m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
406 m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
407
408 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
409 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
410}
411
412
413// ----------------------------------------------------------------------------
414// target window handling
415// ----------------------------------------------------------------------------
416
417void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
418{
419 wxASSERT_MSG( target, wxT("target window must not be NULL") );
420 m_targetWindow = target;
421}
422
423wxWindow *wxScrolledWindow::GetTargetWindow()
424{
425 return m_targetWindow;
426}
427
428// Override this function if you don't want to have wxScrolledWindow
429// automatically change the origin according to the scroll position.
430void wxScrolledWindow::PrepareDC(wxDC& dc)
431{
432 dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
433 -m_yScrollPosition * m_yScrollPixelsPerLine );
434}
435
436void wxScrolledWindow::SetScrollRate( int xstep, int ystep )
437{
438 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
439 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
440
441 m_xScrollPixelsPerLine = xstep;
442 m_yScrollPixelsPerLine = ystep;
443
444 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
445 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
446
447 m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
448
449 AdjustScrollbars();
450}
451
452void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
453{
454 if ( x_unit )
455 *x_unit = m_xScrollPixelsPerLine;
456 if ( y_unit )
457 *y_unit = m_yScrollPixelsPerLine;
458}
459
460int wxScrolledWindow::GetScrollPageSize(int orient) const
461{
462 if ( orient == wxHORIZONTAL )
463 return m_xScrollLinesPerPage;
464 else
465 return m_yScrollLinesPerPage;
466}
467
468void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
469{
470 if ( orient == wxHORIZONTAL )
471 m_xScrollLinesPerPage = pageSize;
472 else
473 m_yScrollLinesPerPage = pageSize;
474}
475
476void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
477{
478 int orient = event.GetOrientation();
479
480 int nScrollInc = CalcScrollInc(event);
481 if (nScrollInc == 0) return;
482
483 if (orient == wxHORIZONTAL)
484 {
485 int newPos = m_xScrollPosition + nScrollInc;
486 SetScrollPos(wxHORIZONTAL, newPos, TRUE );
487 }
488 else
489 {
490 int newPos = m_yScrollPosition + nScrollInc;
491 SetScrollPos(wxVERTICAL, newPos, TRUE );
492 }
493
494 if (orient == wxHORIZONTAL)
495 {
496 m_xScrollPosition += nScrollInc;
497 }
498 else
499 {
500 m_yScrollPosition += nScrollInc;
501 }
502
503 if (orient == wxHORIZONTAL)
504 {
505 if (m_xScrollingEnabled)
506 m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
507 else
508 m_targetWindow->Refresh();
509 }
510 else
511 {
512 if (m_yScrollingEnabled)
513 m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
514 else
515 m_targetWindow->Refresh();
516 }
517}
518
519void wxScrolledWindow::Scroll( int x_pos, int y_pos )
520{
521 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
522
523 if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
524 ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
525
526 if ((x_pos != -1) && (m_xScrollPixelsPerLine))
527 {
528 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
529 if (max < 0) max = 0;
530 if (x_pos > max) x_pos = max;
531 if (x_pos < 0) x_pos = 0;
532
533 int old_x = m_xScrollPosition;
534 m_xScrollPosition = x_pos;
535 m_hAdjust->value = x_pos;
536
537 m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
538
539 // Just update the scrollbar, don't send any wxWindows event
540 GtkHDisconnectEvent();
541 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
542 GtkHConnectEvent();
543 }
544
545 if ((y_pos != -1) && (m_yScrollPixelsPerLine))
546 {
547 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
548 if (max < 0) max = 0;
549 if (y_pos > max) y_pos = max;
550 if (y_pos < 0) y_pos = 0;
551
552 int old_y = m_yScrollPosition;
553 m_yScrollPosition = y_pos;
554 m_vAdjust->value = y_pos;
555
556 m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
557
558 // Just update the scrollbar, don't send any wxWindows event
559 GtkVDisconnectEvent();
560 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
561 GtkVConnectEvent();
562 }
563}
564
565// TODO: [VH]Scroll functions should be combined
566
567void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
568{
569 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
570
571 if (m_yScrollPixelsPerLine == 0)
572 return;
573
574 int y_pos = (int)(value+0.5);
575
576 if (y_pos == m_yScrollPosition)
577 return;
578
579 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
580
581 wxScrollWinEvent event( command, y_pos, wxVERTICAL );
582 event.SetEventObject( this );
583 GetEventHandler()->ProcessEvent( event );
584}
585
586void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
587{
588 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
589
590 if (m_xScrollPixelsPerLine == 0)
591 return;
592
593 int x_pos = (int)(value+0.5);
594
595 if (x_pos == m_xScrollPosition)
596 return;
597
598 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
599
600 wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
601 event.SetEventObject( this );
602 GetEventHandler()->ProcessEvent( event );
603}
604
605void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
606{
607 m_xScrollingEnabled = x_scroll;
608 m_yScrollingEnabled = y_scroll;
609}
610
611// Where the current view starts from
612void wxScrolledWindow::GetViewStart (int *x, int *y) const
613{
614 if ( x )
615 *x = m_xScrollPosition;
616 if ( y )
617 *y = m_yScrollPosition;
618}
619
620void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
621{
622 if ( xx )
623 *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
624 if ( yy )
625 *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
626}
627
628void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
629{
630 if ( xx )
631 *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
632 if ( yy )
633 *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
634}
635
636int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
637{
638 int pos = event.GetPosition();
639 int orient = event.GetOrientation();
640
641 int nScrollInc = 0;
642 if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
643 {
644 if (orient == wxHORIZONTAL)
645 nScrollInc = - m_xScrollPosition;
646 else
647 nScrollInc = - m_yScrollPosition;
648 } else
649 if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
650 {
651 if (orient == wxHORIZONTAL)
652 nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
653 else
654 nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
655 } else
656 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
657 {
658 nScrollInc = -1;
659 } else
660 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
661 {
662 nScrollInc = 1;
663 } else
664 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
665 {
666 if (orient == wxHORIZONTAL)
667 nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
668 else
669 nScrollInc = -GetScrollPageSize(wxVERTICAL);
670 } else
671 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
672 {
673 if (orient == wxHORIZONTAL)
674 nScrollInc = GetScrollPageSize(wxHORIZONTAL);
675 else
676 nScrollInc = GetScrollPageSize(wxVERTICAL);
677 } else
678 if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
679 (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
680 {
681 if (orient == wxHORIZONTAL)
682 nScrollInc = pos - m_xScrollPosition;
683 else
684 nScrollInc = pos - m_yScrollPosition;
685 }
686
687 if (orient == wxHORIZONTAL)
688 {
689 if (m_xScrollPixelsPerLine > 0)
690 {
691 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
692 if (max < 0) max = 0;
693
694 if ( (m_xScrollPosition + nScrollInc) < 0 )
695 nScrollInc = -m_xScrollPosition; // As -ve as we can go
696 else if ( (m_xScrollPosition + nScrollInc) > max )
697 nScrollInc = max - m_xScrollPosition; // As +ve as we can go
698 }
699 else
700 m_targetWindow->Refresh();
701 }
702 else
703 {
704 if (m_yScrollPixelsPerLine > 0)
705 {
706 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
707 if (max < 0) max = 0;
708
709 if ( (m_yScrollPosition + nScrollInc) < 0 )
710 nScrollInc = -m_yScrollPosition; // As -ve as we can go
711 else if ( (m_yScrollPosition + nScrollInc) > max )
712 nScrollInc = max - m_yScrollPosition; // As +ve as we can go
713 }
714 else
715 m_targetWindow->Refresh();
716 }
717
718 return nScrollInc;
719}
720
721void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
722{
723 wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
724
725 wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
726
727 if (orient == wxHORIZONTAL)
728 {
729 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
730 if (max < 0) max = 0;
731
732 if (pos > max) pos = 0;
733 if (pos < 0) pos = 0;
734
735 if (pos == (int)(m_hAdjust->value+0.5)) return;
736 m_hAdjust->value = pos;
737 }
738 else
739 {
740 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
741 if (max < 0) max = 0;
742
743 if (pos > max) pos = 0;
744 if (pos < 0) pos = 0;
745
746 if (pos == (int)(m_vAdjust->value+0.5)) return;
747 m_vAdjust->value = pos;
748 }
749
750 if (m_wxwindow->window)
751 {
752 if (orient == wxHORIZONTAL)
753 {
754 // Just update the scrollbar, don't send any wxWindows event
755 GtkHDisconnectEvent();
756 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
757 GtkHConnectEvent();
758 }
759 else
760 {
761 // Just update the scrollbar, don't send any wxWindows event
762 GtkVDisconnectEvent();
763 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
764 GtkVConnectEvent();
765 }
766 }
767}
768
769void wxScrolledWindow::GtkVConnectEvent()
770{
771 gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
772 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
773}
774
775void wxScrolledWindow::GtkHConnectEvent()
776{
777 gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
778 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
779}
780
781void wxScrolledWindow::GtkHDisconnectEvent()
782{
783 gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
784 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
785}
786
787void wxScrolledWindow::GtkVDisconnectEvent()
788{
789 gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
790 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
791}
792
793bool wxScrolledWindow::Layout()
794{
795 if (GetSizer() && m_targetWindow == this)
796 {
797 // If we're the scroll target, take into account the
798 // virtual size and scrolled position of the window.
799
800 int x, y, w, h;
801 CalcScrolledPosition(0,0, &x,&y);
802 GetVirtualSize(&w, &h);
803 GetSizer()->SetDimension(x, y, w, h);
804 return TRUE;
805 }
806 else
807 return wxPanel::Layout(); // fall back to default for LayoutConstraints
808}
809
810// ----------------------------------------------------------------------------
811// event handlers
812// ----------------------------------------------------------------------------
813
814// Default OnSize resets scrollbars, if any
815void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
816{
817 if( m_targetWindow != this )
818 m_targetWindow->SetVirtualSize( m_targetWindow->GetClientSize() );
819
820 SetVirtualSize( GetClientSize() );
821
822#if wxUSE_CONSTRAINTS
823 if (GetAutoLayout())
824 Layout();
825#endif
826}
827
828// This calls OnDraw, having adjusted the origin according to the current
829// scroll position
830void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
831{
832 wxPaintDC dc(this);
833 PrepareDC(dc);
834
835 OnDraw(dc);
836}
837
838// kbd handling: notice that we use OnChar() and not OnKeyDown() for
839// compatibility here - if we used OnKeyDown(), the programs which process
840// arrows themselves in their OnChar() would never get the message and like
841// this they always have the priority
842void wxScrolledWindow::OnChar(wxKeyEvent& event)
843{
844 int stx, sty, // view origin
845 szx, szy, // view size (total)
846 clix, cliy; // view size (on screen)
847
848 ViewStart(&stx, &sty);
849 GetClientSize(&clix, &cliy);
850 GetVirtualSize(&szx, &szy);
851
852 if( m_xScrollPixelsPerLine )
853 {
854 clix /= m_xScrollPixelsPerLine;
855 szx /= m_xScrollPixelsPerLine;
856 }
857 else
858 {
859 clix = 0;
860 szx = -1;
861 }
862 if( m_yScrollPixelsPerLine )
863 {
864 cliy /= m_yScrollPixelsPerLine;
865 szy /= m_yScrollPixelsPerLine;
866 }
867 else
868 {
869 cliy = 0;
870 szy = -1;
871 }
872
873 int xScrollOld = GetScrollPos(wxHORIZONTAL),
874 yScrollOld = GetScrollPos(wxVERTICAL);
875
876 int dsty;
877 switch ( event.KeyCode() )
878 {
879 case WXK_PAGEUP:
880 case WXK_PRIOR:
881 dsty = sty - (5 * cliy / 6);
882 Scroll(-1, (dsty == -1) ? 0 : dsty);
883 break;
884
885 case WXK_PAGEDOWN:
886 case WXK_NEXT:
887 Scroll(-1, sty + (5 * cliy / 6));
888 break;
889
890 case WXK_HOME:
891 Scroll(0, event.ControlDown() ? 0 : -1);
892 break;
893
894 case WXK_END:
895 Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1);
896 break;
897
898 case WXK_UP:
899 Scroll(-1, sty - 1);
900 break;
901
902 case WXK_DOWN:
903 Scroll(-1, sty + 1);
904 break;
905
906 case WXK_LEFT:
907 Scroll(stx - 1, -1);
908 break;
909
910 case WXK_RIGHT:
911 Scroll(stx + 1, -1);
912 break;
913
914 default:
915 // not for us
916 event.Skip();
917 return;
918 }
919
920 int xScroll = GetScrollPos(wxHORIZONTAL);
921 if ( xScroll != xScrollOld )
922 {
923 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, xScroll,
924 wxHORIZONTAL);
925 event.SetEventObject(this);
926 GetEventHandler()->ProcessEvent(event);
927 }
928
929 int yScroll = GetScrollPos(wxVERTICAL);
930 if ( yScroll != yScrollOld )
931 {
932 wxScrollWinEvent event(wxEVT_SCROLLWIN_THUMBTRACK, yScroll,
933 wxVERTICAL);
934 event.SetEventObject(this);
935 GetEventHandler()->ProcessEvent(event);
936 }
937}
938
939
940// vi:sts=4:sw=4:et
wxWidgets (Impactor)