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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#if wxUSE_CONSTRAINTS
330 if (GetAutoLayout())
331 Layout();
332#endif
333}
334
335/*
336 * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line)
337 * noUnitsX/noUnitsY: : no. units per scrollbar
338 */
339void wxScrolledWindow::SetScrollbars( int pixelsPerUnitX, int pixelsPerUnitY,
340 int noUnitsX, int noUnitsY,
341 int xPos, int yPos, bool noRefresh )
342{
343 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
344 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
345
346 m_xScrollPixelsPerLine = pixelsPerUnitX;
347 m_yScrollPixelsPerLine = pixelsPerUnitY;
348
349 m_hAdjust->value = m_xScrollPosition = xPos;
350 m_vAdjust->value = m_yScrollPosition = yPos;
351
352 m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
353
354 if (!noRefresh)
355 {
356 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
357 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
358
359 m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
360 }
361}
362
363void wxScrolledWindow::AdjustScrollbars()
364{
365 int w, h;
366 int vw, vh;
367
368 m_targetWindow->GetClientSize( &w, &h );
369 m_targetWindow->GetVirtualSize( &vw, &vh );
370
371 if (m_xScrollPixelsPerLine == 0)
372 {
373 m_hAdjust->upper = 1.0;
374 m_hAdjust->page_size = 1.0;
375 }
376 else
377 {
378 m_hAdjust->upper = vw / m_xScrollPixelsPerLine;
379 m_hAdjust->page_size = (w / m_xScrollPixelsPerLine);
380
381 // If the scrollbar hits the right side, move the window
382 // right to keep it from over extending.
383
384 if( m_hAdjust->value + m_hAdjust->page_size > m_hAdjust->upper )
385 {
386 m_hAdjust->value = m_hAdjust->upper - m_hAdjust->page_size;
387 m_xScrollPosition = (int)m_hAdjust->value;
388 }
389 }
390
391 if (m_yScrollPixelsPerLine == 0)
392 {
393 m_vAdjust->upper = 1.0;
394 m_vAdjust->page_size = 1.0;
395 }
396 else
397 {
398 m_vAdjust->upper = vh / m_yScrollPixelsPerLine;
399 m_vAdjust->page_size = (h / m_yScrollPixelsPerLine);
400
401 if( m_vAdjust->value + m_vAdjust->page_size > m_vAdjust->upper )
402 {
403 m_vAdjust->value = m_vAdjust->upper - m_vAdjust->page_size;
404 m_yScrollPosition = (int)m_vAdjust->value;
405 }
406 }
407
408 m_xScrollLinesPerPage = (int)(m_hAdjust->page_size + 0.5);
409 m_yScrollLinesPerPage = (int)(m_vAdjust->page_size + 0.5);
410
411 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "changed" );
412 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "changed" );
413}
414
415
416// ----------------------------------------------------------------------------
417// target window handling
418// ----------------------------------------------------------------------------
419
420void wxScrolledWindow::SetTargetWindow( wxWindow *target, bool WXUNUSED(pushEventHandler) )
421{
422 wxASSERT_MSG( target, wxT("target window must not be NULL") );
423 m_targetWindow = target;
424}
425
426wxWindow *wxScrolledWindow::GetTargetWindow()
427{
428 return m_targetWindow;
429}
430
431// Override this function if you don't want to have wxScrolledWindow
432// automatically change the origin according to the scroll position.
433void wxScrolledWindow::PrepareDC(wxDC& dc)
434{
435 dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine,
436 -m_yScrollPosition * m_yScrollPixelsPerLine );
437}
438
439void wxScrolledWindow::SetScrollRate( int xstep, int ystep )
440{
441 int old_x = m_xScrollPixelsPerLine * m_xScrollPosition;
442 int old_y = m_yScrollPixelsPerLine * m_yScrollPosition;
443
444 m_xScrollPixelsPerLine = xstep;
445 m_yScrollPixelsPerLine = ystep;
446
447 int new_x = m_xScrollPixelsPerLine * m_xScrollPosition;
448 int new_y = m_yScrollPixelsPerLine * m_yScrollPosition;
449
450 m_targetWindow->ScrollWindow( old_x - new_x, old_y - new_y );
451
452 AdjustScrollbars();
453}
454
455void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const
456{
457 if ( x_unit )
458 *x_unit = m_xScrollPixelsPerLine;
459 if ( y_unit )
460 *y_unit = m_yScrollPixelsPerLine;
461}
462
463int wxScrolledWindow::GetScrollPageSize(int orient) const
464{
465 if ( orient == wxHORIZONTAL )
466 return m_xScrollLinesPerPage;
467 else
468 return m_yScrollLinesPerPage;
469}
470
471void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize)
472{
473 if ( orient == wxHORIZONTAL )
474 m_xScrollLinesPerPage = pageSize;
475 else
476 m_yScrollLinesPerPage = pageSize;
477}
478
479void wxScrolledWindow::OnScroll(wxScrollWinEvent& event)
480{
481 int orient = event.GetOrientation();
482
483 int nScrollInc = CalcScrollInc(event);
484 if (nScrollInc == 0) return;
485
486 if (orient == wxHORIZONTAL)
487 {
488 int newPos = m_xScrollPosition + nScrollInc;
489 SetScrollPos(wxHORIZONTAL, newPos, TRUE );
490 }
491 else
492 {
493 int newPos = m_yScrollPosition + nScrollInc;
494 SetScrollPos(wxVERTICAL, newPos, TRUE );
495 }
496
497 if (orient == wxHORIZONTAL)
498 {
499 m_xScrollPosition += nScrollInc;
500 }
501 else
502 {
503 m_yScrollPosition += nScrollInc;
504 }
505
506 if (orient == wxHORIZONTAL)
507 {
508 if (m_xScrollingEnabled)
509 m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL);
510 else
511 m_targetWindow->Refresh();
512 }
513 else
514 {
515 if (m_yScrollingEnabled)
516 m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL);
517 else
518 m_targetWindow->Refresh();
519 }
520}
521
522void wxScrolledWindow::Scroll( int x_pos, int y_pos )
523{
524 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
525
526 if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
527 ((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
528
529 if ((x_pos != -1) && (m_xScrollPixelsPerLine))
530 {
531 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
532 if (max < 0) max = 0;
533 if (x_pos > max) x_pos = max;
534 if (x_pos < 0) x_pos = 0;
535
536 int old_x = m_xScrollPosition;
537 m_xScrollPosition = x_pos;
538 m_hAdjust->value = x_pos;
539
540 m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 );
541
542 // Just update the scrollbar, don't send any wxWindows event
543 GtkHDisconnectEvent();
544 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
545 GtkHConnectEvent();
546 }
547
548 if ((y_pos != -1) && (m_yScrollPixelsPerLine))
549 {
550 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
551 if (max < 0) max = 0;
552 if (y_pos > max) y_pos = max;
553 if (y_pos < 0) y_pos = 0;
554
555 int old_y = m_yScrollPosition;
556 m_yScrollPosition = y_pos;
557 m_vAdjust->value = y_pos;
558
559 m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine );
560
561 // Just update the scrollbar, don't send any wxWindows event
562 GtkVDisconnectEvent();
563 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
564 GtkVConnectEvent();
565 }
566}
567
568// TODO: [VH]Scroll functions should be combined
569
570void wxScrolledWindow::GtkVScroll( float value, unsigned int scroll_type )
571{
572 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
573
574 if (m_yScrollPixelsPerLine == 0)
575 return;
576
577 int y_pos = (int)(value+0.5);
578
579 if (y_pos == m_yScrollPosition)
580 return;
581
582 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
583
584 wxScrollWinEvent event( command, y_pos, wxVERTICAL );
585 event.SetEventObject( this );
586 GetEventHandler()->ProcessEvent( event );
587}
588
589void wxScrolledWindow::GtkHScroll( float value, unsigned int scroll_type )
590{
591 wxASSERT_MSG( m_targetWindow != 0, _T("No target window") );
592
593 if (m_xScrollPixelsPerLine == 0)
594 return;
595
596 int x_pos = (int)(value+0.5);
597
598 if (x_pos == m_xScrollPosition)
599 return;
600
601 wxEventType command = GtkScrollWinTypeToWx(scroll_type);
602
603 wxScrollWinEvent event( command, x_pos, wxHORIZONTAL );
604 event.SetEventObject( this );
605 GetEventHandler()->ProcessEvent( event );
606}
607
608void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll)
609{
610 m_xScrollingEnabled = x_scroll;
611 m_yScrollingEnabled = y_scroll;
612}
613
614// Where the current view starts from
615void wxScrolledWindow::GetViewStart (int *x, int *y) const
616{
617 if ( x )
618 *x = m_xScrollPosition;
619 if ( y )
620 *y = m_yScrollPosition;
621}
622
623void wxScrolledWindow::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
624{
625 if ( xx )
626 *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
627 if ( yy )
628 *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
629}
630
631void wxScrolledWindow::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
632{
633 if ( xx )
634 *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
635 if ( yy )
636 *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine;
637}
638
639int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event)
640{
641 int pos = event.GetPosition();
642 int orient = event.GetOrientation();
643
644 int nScrollInc = 0;
645 if (event.GetEventType() == wxEVT_SCROLLWIN_TOP)
646 {
647 if (orient == wxHORIZONTAL)
648 nScrollInc = - m_xScrollPosition;
649 else
650 nScrollInc = - m_yScrollPosition;
651 } else
652 if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM)
653 {
654 if (orient == wxHORIZONTAL)
655 nScrollInc = GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine - m_xScrollPosition;
656 else
657 nScrollInc = GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine - m_yScrollPosition;
658 } else
659 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP)
660 {
661 nScrollInc = -1;
662 } else
663 if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN)
664 {
665 nScrollInc = 1;
666 } else
667 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP)
668 {
669 if (orient == wxHORIZONTAL)
670 nScrollInc = -GetScrollPageSize(wxHORIZONTAL);
671 else
672 nScrollInc = -GetScrollPageSize(wxVERTICAL);
673 } else
674 if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN)
675 {
676 if (orient == wxHORIZONTAL)
677 nScrollInc = GetScrollPageSize(wxHORIZONTAL);
678 else
679 nScrollInc = GetScrollPageSize(wxVERTICAL);
680 } else
681 if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) ||
682 (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE))
683 {
684 if (orient == wxHORIZONTAL)
685 nScrollInc = pos - m_xScrollPosition;
686 else
687 nScrollInc = pos - m_yScrollPosition;
688 }
689
690 if (orient == wxHORIZONTAL)
691 {
692 if (m_xScrollPixelsPerLine > 0)
693 {
694 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
695 if (max < 0) max = 0;
696
697 if ( (m_xScrollPosition + nScrollInc) < 0 )
698 nScrollInc = -m_xScrollPosition; // As -ve as we can go
699 else if ( (m_xScrollPosition + nScrollInc) > max )
700 nScrollInc = max - m_xScrollPosition; // As +ve as we can go
701 }
702 else
703 m_targetWindow->Refresh();
704 }
705 else
706 {
707 if (m_yScrollPixelsPerLine > 0)
708 {
709 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
710 if (max < 0) max = 0;
711
712 if ( (m_yScrollPosition + nScrollInc) < 0 )
713 nScrollInc = -m_yScrollPosition; // As -ve as we can go
714 else if ( (m_yScrollPosition + nScrollInc) > max )
715 nScrollInc = max - m_yScrollPosition; // As +ve as we can go
716 }
717 else
718 m_targetWindow->Refresh();
719 }
720
721 return nScrollInc;
722}
723
724void wxScrolledWindow::SetScrollPos( int orient, int pos, bool refresh )
725{
726 wxCHECK_RET( m_widget != NULL, wxT("invalid window") );
727
728 wxCHECK_RET( m_wxwindow != NULL, wxT("window needs client area for scrolling") );
729
730 if (orient == wxHORIZONTAL)
731 {
732 int max = (int)(m_hAdjust->upper - m_hAdjust->page_size + 0.5);
733 if (max < 0) max = 0;
734
735 if (pos > max) pos = 0;
736 if (pos < 0) pos = 0;
737
738 if (pos == (int)(m_hAdjust->value+0.5)) return;
739 m_hAdjust->value = pos;
740 }
741 else
742 {
743 int max = (int)(m_vAdjust->upper - m_vAdjust->page_size + 0.5);
744 if (max < 0) max = 0;
745
746 if (pos > max) pos = 0;
747 if (pos < 0) pos = 0;
748
749 if (pos == (int)(m_vAdjust->value+0.5)) return;
750 m_vAdjust->value = pos;
751 }
752
753 if (m_wxwindow->window)
754 {
755 if (orient == wxHORIZONTAL)
756 {
757 // Just update the scrollbar, don't send any wxWindows event
758 GtkHDisconnectEvent();
759 gtk_signal_emit_by_name( GTK_OBJECT(m_hAdjust), "value_changed" );
760 GtkHConnectEvent();
761 }
762 else
763 {
764 // Just update the scrollbar, don't send any wxWindows event
765 GtkVDisconnectEvent();
766 gtk_signal_emit_by_name( GTK_OBJECT(m_vAdjust), "value_changed" );
767 GtkVConnectEvent();
768 }
769 }
770}
771
772void wxScrolledWindow::GtkVConnectEvent()
773{
774 gtk_signal_connect( GTK_OBJECT(m_vAdjust), "value_changed",
775 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
776}
777
778void wxScrolledWindow::GtkHConnectEvent()
779{
780 gtk_signal_connect( GTK_OBJECT(m_hAdjust), "value_changed",
781 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
782}
783
784void wxScrolledWindow::GtkHDisconnectEvent()
785{
786 gtk_signal_disconnect_by_func( GTK_OBJECT(m_hAdjust),
787 (GtkSignalFunc) gtk_scrolled_window_hscroll_callback, (gpointer) this );
788}
789
790void wxScrolledWindow::GtkVDisconnectEvent()
791{
792 gtk_signal_disconnect_by_func( GTK_OBJECT(m_vAdjust),
793 (GtkSignalFunc) gtk_scrolled_window_vscroll_callback, (gpointer) this );
794}
795
796bool wxScrolledWindow::Layout()
797{
798 if (GetSizer() && m_targetWindow == this)
799 {
800 // If we're the scroll target, take into account the
801 // virtual size and scrolled position of the window.
802
803 int x, y, w, h;
804 CalcScrolledPosition(0,0, &x,&y);
805 GetVirtualSize(&w, &h);
806 GetSizer()->SetDimension(x, y, w, h);
807 return TRUE;
808 }
809 else
810 return wxPanel::Layout(); // fall back to default for LayoutConstraints
811}
812
813// ----------------------------------------------------------------------------
814// event handlers
815// ----------------------------------------------------------------------------
816
817// Default OnSize resets scrollbars, if any
818void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event))
819{
820 if( m_targetWindow != this )
821 m_targetWindow->SetVirtualSize( m_targetWindow->GetClientSize() );
822
823 SetVirtualSize( GetClientSize() );
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)