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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: generic/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/generic/scrolwin.h" | |
35 | #include "wx/panel.h" | |
36 | ||
37 | #ifdef __WXMSW__ | |
38 | #include "windows.h" | |
39 | #endif | |
40 | ||
41 | #ifdef __WXMOTIF__ | |
42 | // For wxRETAINED implementation | |
43 | #ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++ | |
44 | //This code switches off the compiler warnings | |
45 | # pragma message disable nosimpint | |
46 | #endif | |
47 | #include <Xm/Xm.h> | |
48 | #ifdef __VMS__ | |
49 | # pragma message enable nosimpint | |
50 | #endif | |
51 | #endif | |
52 | ||
53 | // ---------------------------------------------------------------------------- | |
54 | // event tables | |
55 | // ---------------------------------------------------------------------------- | |
56 | ||
57 | BEGIN_EVENT_TABLE(wxScrolledWindow, wxPanel) | |
58 | EVT_SCROLLWIN(wxScrolledWindow::OnScroll) | |
59 | EVT_SIZE(wxScrolledWindow::OnSize) | |
60 | EVT_PAINT(wxScrolledWindow::OnPaint) | |
61 | EVT_CHAR(wxScrolledWindow::OnChar) | |
62 | END_EVENT_TABLE() | |
63 | ||
64 | IMPLEMENT_DYNAMIC_CLASS(wxScrolledWindow, wxPanel) | |
65 | ||
66 | // ============================================================================ | |
67 | // implementation | |
68 | // ============================================================================ | |
69 | ||
70 | // ---------------------------------------------------------------------------- | |
71 | // wxScrolledWindow creation | |
72 | // ---------------------------------------------------------------------------- | |
73 | ||
74 | wxScrolledWindow::wxScrolledWindow() | |
75 | { | |
76 | m_xScrollPixelsPerLine = 0; | |
77 | m_yScrollPixelsPerLine = 0; | |
78 | m_xScrollingEnabled = TRUE; | |
79 | m_yScrollingEnabled = TRUE; | |
80 | m_xScrollPosition = 0; | |
81 | m_yScrollPosition = 0; | |
82 | m_xScrollLines = 0; | |
83 | m_yScrollLines = 0; | |
84 | m_xScrollLinesPerPage = 0; | |
85 | m_yScrollLinesPerPage = 0; | |
86 | m_scaleX = 1.0; | |
87 | m_scaleY = 1.0; | |
88 | } | |
89 | ||
90 | bool wxScrolledWindow::Create(wxWindow *parent, | |
91 | wxWindowID id, | |
92 | const wxPoint& pos, | |
93 | const wxSize& size, | |
94 | long style, | |
95 | const wxString& name) | |
96 | { | |
97 | m_xScrollPixelsPerLine = 0; | |
98 | m_yScrollPixelsPerLine = 0; | |
99 | m_xScrollingEnabled = TRUE; | |
100 | m_yScrollingEnabled = TRUE; | |
101 | m_xScrollPosition = 0; | |
102 | m_yScrollPosition = 0; | |
103 | m_xScrollLines = 0; | |
104 | m_yScrollLines = 0; | |
105 | m_xScrollLinesPerPage = 0; | |
106 | m_yScrollLinesPerPage = 0; | |
107 | m_scaleX = 1.0; | |
108 | m_scaleY = 1.0; | |
109 | ||
110 | m_targetWindow = this; | |
111 | ||
112 | // we need wxWANTS_CHARS to process arrows ourselves | |
113 | return wxPanel::Create(parent, id, pos, size, style | wxWANTS_CHARS, name); | |
114 | } | |
115 | ||
116 | wxScrolledWindow::~wxScrolledWindow() | |
117 | { | |
118 | } | |
119 | ||
120 | // ---------------------------------------------------------------------------- | |
121 | // setting scrolling parameters | |
122 | // ---------------------------------------------------------------------------- | |
123 | ||
124 | /* | |
125 | * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line) | |
126 | * noUnitsX/noUnitsY: : no. units per scrollbar | |
127 | */ | |
128 | void wxScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY, | |
129 | int noUnitsX, int noUnitsY, | |
130 | int xPos, int yPos, bool noRefresh ) | |
131 | { | |
132 | int xpos, ypos; | |
133 | ||
134 | CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos); | |
135 | bool do_refresh = | |
136 | ( | |
137 | (noUnitsX != 0 && m_xScrollLines == 0) || | |
138 | (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX*noUnitsX) || | |
139 | ||
140 | (noUnitsY != 0 && m_yScrollLines == 0) || | |
141 | (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY*noUnitsY) || | |
142 | (xPos != m_xScrollPosition) || | |
143 | (yPos != m_yScrollPosition) | |
144 | // (pixelsPerUnitX != m_xScrollPixelsPerLine) || | |
145 | // (pixelsPerUnitY != m_yScrollPixelsPerLine) | |
146 | ); | |
147 | ||
148 | m_xScrollPixelsPerLine = pixelsPerUnitX; | |
149 | m_yScrollPixelsPerLine = pixelsPerUnitY; | |
150 | m_xScrollPosition = xPos; | |
151 | m_yScrollPosition = yPos; | |
152 | m_xScrollLines = noUnitsX; | |
153 | m_yScrollLines = noUnitsY; | |
154 | ||
155 | #ifdef __WXMOTIF__ | |
156 | // Sorry, some Motif-specific code to implement a backing pixmap | |
157 | // for the wxRETAINED style. Implementing a backing store can't | |
158 | // be entirely generic because it relies on the wxWindowDC implementation | |
159 | // to duplicate X drawing calls for the backing pixmap. | |
160 | ||
161 | if ((m_windowStyle & wxRETAINED) == wxRETAINED) | |
162 | { | |
163 | Display* dpy = XtDisplay((Widget) GetMainWidget()); | |
164 | ||
165 | int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; | |
166 | int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; | |
167 | if (m_backingPixmap && | |
168 | !((m_pixmapWidth == totalPixelWidth) && | |
169 | (m_pixmapHeight == totalPixelHeight))) | |
170 | { | |
171 | XFreePixmap (dpy, (Pixmap) m_backingPixmap); | |
172 | m_backingPixmap = (WXPixmap) 0; | |
173 | } | |
174 | ||
175 | if (!m_backingPixmap && | |
176 | (noUnitsX != 0) && (noUnitsY != 0)) | |
177 | { | |
178 | int depth = wxDisplayDepth(); | |
179 | m_pixmapWidth = totalPixelWidth; | |
180 | m_pixmapHeight = totalPixelHeight; | |
181 | m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), | |
182 | m_pixmapWidth, m_pixmapHeight, depth); | |
183 | } | |
184 | ||
185 | } | |
186 | #endif // Motif | |
187 | ||
188 | AdjustScrollbars(); | |
189 | ||
190 | if (do_refresh && !noRefresh) | |
191 | m_targetWindow->Refresh(); | |
192 | ||
193 | #ifdef __WXMSW__ | |
194 | // GRG: if this turns out to be really necessary, we could | |
195 | // at least move it to the above if { ... } so that it is | |
196 | // only done if noRefresh = FALSE (the default). OTOH, if | |
197 | // this doesn't break anything, which seems to be the | |
198 | // case, we could just leave it out. | |
199 | ||
200 | // Necessary? | |
201 | // UpdateWindow ((HWND) m_targetWindow->GetHWND()); | |
202 | #endif | |
203 | #ifdef __WXMAC__ | |
204 | m_targetWindow->MacUpdateImmediately() ; | |
205 | #endif | |
206 | } | |
207 | ||
208 | // ---------------------------------------------------------------------------- | |
209 | // target window handling | |
210 | // ---------------------------------------------------------------------------- | |
211 | ||
212 | void wxScrolledWindow::SetTargetWindow( wxWindow *target ) | |
213 | { | |
214 | wxASSERT_MSG( target, wxT("target window must not be NULL") ); | |
215 | m_targetWindow = target; | |
216 | } | |
217 | ||
218 | wxWindow *wxScrolledWindow::GetTargetWindow() | |
219 | { | |
220 | return m_targetWindow; | |
221 | } | |
222 | ||
223 | // ---------------------------------------------------------------------------- | |
224 | // scrolling implementation itself | |
225 | // ---------------------------------------------------------------------------- | |
226 | ||
227 | void wxScrolledWindow::OnScroll(wxScrollWinEvent& event) | |
228 | { | |
229 | int orient = event.GetOrientation(); | |
230 | ||
231 | int nScrollInc = CalcScrollInc(event); | |
232 | if (nScrollInc == 0) return; | |
233 | ||
234 | if (orient == wxHORIZONTAL) | |
235 | { | |
236 | int newPos = m_xScrollPosition + nScrollInc; | |
237 | SetScrollPos(wxHORIZONTAL, newPos, TRUE ); | |
238 | } | |
239 | else | |
240 | { | |
241 | int newPos = m_yScrollPosition + nScrollInc; | |
242 | SetScrollPos(wxVERTICAL, newPos, TRUE ); | |
243 | } | |
244 | ||
245 | if (orient == wxHORIZONTAL) | |
246 | { | |
247 | m_xScrollPosition += nScrollInc; | |
248 | } | |
249 | else | |
250 | { | |
251 | m_yScrollPosition += nScrollInc; | |
252 | } | |
253 | ||
254 | if (orient == wxHORIZONTAL) | |
255 | { | |
256 | if (m_xScrollingEnabled) | |
257 | m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL); | |
258 | else | |
259 | m_targetWindow->Refresh(); | |
260 | } | |
261 | else | |
262 | { | |
263 | if (m_yScrollingEnabled) | |
264 | m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL); | |
265 | else | |
266 | m_targetWindow->Refresh(); | |
267 | } | |
268 | #ifdef __WXMAC__ | |
269 | m_targetWindow->MacUpdateImmediately() ; | |
270 | #endif | |
271 | } | |
272 | ||
273 | int wxScrolledWindow::CalcScrollInc(wxScrollWinEvent& event) | |
274 | { | |
275 | int pos = event.GetPosition(); | |
276 | int orient = event.GetOrientation(); | |
277 | ||
278 | int nScrollInc = 0; | |
279 | switch (event.GetEventType()) | |
280 | { | |
281 | case wxEVT_SCROLLWIN_TOP: | |
282 | { | |
283 | if (orient == wxHORIZONTAL) | |
284 | nScrollInc = - m_xScrollPosition; | |
285 | else | |
286 | nScrollInc = - m_yScrollPosition; | |
287 | break; | |
288 | } | |
289 | case wxEVT_SCROLLWIN_BOTTOM: | |
290 | { | |
291 | if (orient == wxHORIZONTAL) | |
292 | nScrollInc = m_xScrollLines - m_xScrollPosition; | |
293 | else | |
294 | nScrollInc = m_yScrollLines - m_yScrollPosition; | |
295 | break; | |
296 | } | |
297 | case wxEVT_SCROLLWIN_LINEUP: | |
298 | { | |
299 | nScrollInc = -1; | |
300 | break; | |
301 | } | |
302 | case wxEVT_SCROLLWIN_LINEDOWN: | |
303 | { | |
304 | nScrollInc = 1; | |
305 | break; | |
306 | } | |
307 | case wxEVT_SCROLLWIN_PAGEUP: | |
308 | { | |
309 | if (orient == wxHORIZONTAL) | |
310 | nScrollInc = -GetScrollPageSize(wxHORIZONTAL); | |
311 | else | |
312 | nScrollInc = -GetScrollPageSize(wxVERTICAL); | |
313 | break; | |
314 | } | |
315 | case wxEVT_SCROLLWIN_PAGEDOWN: | |
316 | { | |
317 | if (orient == wxHORIZONTAL) | |
318 | nScrollInc = GetScrollPageSize(wxHORIZONTAL); | |
319 | else | |
320 | nScrollInc = GetScrollPageSize(wxVERTICAL); | |
321 | break; | |
322 | } | |
323 | case wxEVT_SCROLLWIN_THUMBTRACK: | |
324 | case wxEVT_SCROLLWIN_THUMBRELEASE: | |
325 | { | |
326 | if (orient == wxHORIZONTAL) | |
327 | nScrollInc = pos - m_xScrollPosition; | |
328 | else | |
329 | nScrollInc = pos - m_yScrollPosition; | |
330 | break; | |
331 | } | |
332 | default: | |
333 | { | |
334 | break; | |
335 | } | |
336 | } | |
337 | ||
338 | if (orient == wxHORIZONTAL) | |
339 | { | |
340 | if (m_xScrollPixelsPerLine > 0) | |
341 | { | |
342 | int w, h; | |
343 | m_targetWindow->GetClientSize(&w, &h); | |
344 | ||
345 | int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; | |
346 | int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
347 | if (noPositions < 0) | |
348 | noPositions = 0; | |
349 | ||
350 | if ( (m_xScrollPosition + nScrollInc) < 0 ) | |
351 | nScrollInc = -m_xScrollPosition; // As -ve as we can go | |
352 | else if ( (m_xScrollPosition + nScrollInc) > noPositions ) | |
353 | nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go | |
354 | } | |
355 | else | |
356 | m_targetWindow->Refresh(); | |
357 | } | |
358 | else | |
359 | { | |
360 | if (m_yScrollPixelsPerLine > 0) | |
361 | { | |
362 | int w, h; | |
363 | m_targetWindow->GetClientSize(&w, &h); | |
364 | ||
365 | int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; | |
366 | int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
367 | if (noPositions < 0) | |
368 | noPositions = 0; | |
369 | ||
370 | if ( (m_yScrollPosition + nScrollInc) < 0 ) | |
371 | nScrollInc = -m_yScrollPosition; // As -ve as we can go | |
372 | else if ( (m_yScrollPosition + nScrollInc) > noPositions ) | |
373 | nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go | |
374 | } | |
375 | else | |
376 | m_targetWindow->Refresh(); | |
377 | } | |
378 | ||
379 | return nScrollInc; | |
380 | } | |
381 | ||
382 | // Adjust the scrollbars - new version. | |
383 | void wxScrolledWindow::AdjustScrollbars() | |
384 | { | |
385 | int w, h; | |
386 | m_targetWindow->GetClientSize(&w, &h); | |
387 | ||
388 | int oldXScroll = m_xScrollPosition; | |
389 | int oldYScroll = m_yScrollPosition; | |
390 | ||
391 | if (m_xScrollLines > 0) | |
392 | { | |
393 | // Calculate page size i.e. number of scroll units you get on the | |
394 | // current client window | |
395 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
396 | if (noPagePositions < 1) noPagePositions = 1; | |
397 | ||
398 | // Correct position if greater than extent of canvas minus | |
399 | // the visible portion of it or if below zero | |
400 | m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition); | |
401 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
402 | ||
403 | SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines); | |
404 | // The amount by which we scroll when paging | |
405 | SetScrollPageSize(wxHORIZONTAL, noPagePositions); | |
406 | } | |
407 | else | |
408 | { | |
409 | m_xScrollPosition = 0; | |
410 | SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE); | |
411 | } | |
412 | ||
413 | if (m_yScrollLines > 0) | |
414 | { | |
415 | // Calculate page size i.e. number of scroll units you get on the | |
416 | // current client window | |
417 | int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
418 | if (noPagePositions < 1) noPagePositions = 1; | |
419 | ||
420 | // Correct position if greater than extent of canvas minus | |
421 | // the visible portion of it or if below zero | |
422 | m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition ); | |
423 | m_yScrollPosition = wxMax( 0, m_yScrollPosition ); | |
424 | ||
425 | SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines); | |
426 | // The amount by which we scroll when paging | |
427 | SetScrollPageSize(wxVERTICAL, noPagePositions); | |
428 | } | |
429 | else | |
430 | { | |
431 | m_yScrollPosition = 0; | |
432 | SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); | |
433 | } | |
434 | ||
435 | if (oldXScroll != m_xScrollPosition) | |
436 | { | |
437 | if (m_xScrollingEnabled) | |
438 | m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL ); | |
439 | else | |
440 | m_targetWindow->Refresh(); | |
441 | } | |
442 | ||
443 | if (oldYScroll != m_yScrollPosition) | |
444 | { | |
445 | if (m_yScrollingEnabled) | |
446 | m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL ); | |
447 | else | |
448 | m_targetWindow->Refresh(); | |
449 | } | |
450 | } | |
451 | ||
452 | // Override this function if you don't want to have wxScrolledWindow | |
453 | // automatically change the origin according to the scroll position. | |
454 | void wxScrolledWindow::PrepareDC(wxDC& dc) | |
455 | { | |
456 | dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine, | |
457 | -m_yScrollPosition * m_yScrollPixelsPerLine ); | |
458 | dc.SetUserScale( m_scaleX, m_scaleY ); | |
459 | } | |
460 | ||
461 | #if WXWIN_COMPATIBILITY | |
462 | void wxScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const | |
463 | { | |
464 | *x_page = GetScrollPageSize(wxHORIZONTAL); | |
465 | *y_page = GetScrollPageSize(wxVERTICAL); | |
466 | } | |
467 | ||
468 | void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const | |
469 | { | |
470 | if ( xx ) | |
471 | *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine); | |
472 | if ( yy ) | |
473 | *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine); | |
474 | } | |
475 | #endif // WXWIN_COMPATIBILITY | |
476 | ||
477 | void wxScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const | |
478 | { | |
479 | if ( x_unit ) | |
480 | *x_unit = m_xScrollPixelsPerLine; | |
481 | if ( y_unit ) | |
482 | *y_unit = m_yScrollPixelsPerLine; | |
483 | } | |
484 | ||
485 | int wxScrolledWindow::GetScrollPageSize(int orient) const | |
486 | { | |
487 | if ( orient == wxHORIZONTAL ) | |
488 | return m_xScrollLinesPerPage; | |
489 | else | |
490 | return m_yScrollLinesPerPage; | |
491 | } | |
492 | ||
493 | void wxScrolledWindow::SetScrollPageSize(int orient, int pageSize) | |
494 | { | |
495 | if ( orient == wxHORIZONTAL ) | |
496 | m_xScrollLinesPerPage = pageSize; | |
497 | else | |
498 | m_yScrollLinesPerPage = pageSize; | |
499 | } | |
500 | ||
501 | /* | |
502 | * Scroll to given position (scroll position, not pixel position) | |
503 | */ | |
504 | void wxScrolledWindow::Scroll( int x_pos, int y_pos ) | |
505 | { | |
506 | if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && | |
507 | ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; | |
508 | ||
509 | int w, h; | |
510 | m_targetWindow->GetClientSize(&w, &h); | |
511 | ||
512 | if (x_pos != -1) | |
513 | { | |
514 | int old_x = m_xScrollPosition; | |
515 | m_xScrollPosition = x_pos; | |
516 | ||
517 | // Calculate page size i.e. number of scroll units you get on the | |
518 | // current client window | |
519 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
520 | if (noPagePositions < 1) noPagePositions = 1; | |
521 | ||
522 | // Correct position if greater than extent of canvas minus | |
523 | // the visible portion of it or if below zero | |
524 | m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition ); | |
525 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
526 | ||
527 | if (old_x == m_xScrollPosition) return; | |
528 | ||
529 | m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE ); | |
530 | m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 ); | |
531 | } | |
532 | if (y_pos != -1) | |
533 | { | |
534 | int old_y = m_yScrollPosition; | |
535 | m_yScrollPosition = y_pos; | |
536 | ||
537 | // Calculate page size i.e. number of scroll units you get on the | |
538 | // current client window | |
539 | int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
540 | if (noPagePositions < 1) noPagePositions = 1; | |
541 | ||
542 | // Correct position if greater than extent of canvas minus | |
543 | // the visible portion of it or if below zero | |
544 | m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition ); | |
545 | m_yScrollPosition = wxMax( 0, m_yScrollPosition ); | |
546 | ||
547 | if (old_y == m_yScrollPosition) return; | |
548 | ||
549 | m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE ); | |
550 | m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine ); | |
551 | } | |
552 | ||
553 | #ifdef __WXMAC__ | |
554 | m_targetWindow->MacUpdateImmediately(); | |
555 | #endif | |
556 | } | |
557 | ||
558 | void wxScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll) | |
559 | { | |
560 | m_xScrollingEnabled = x_scroll; | |
561 | m_yScrollingEnabled = y_scroll; | |
562 | } | |
563 | ||
564 | void wxScrolledWindow::GetVirtualSize (int *x, int *y) const | |
565 | { | |
566 | if ( x ) | |
567 | *x = m_xScrollPixelsPerLine * m_xScrollLines; | |
568 | if ( y ) | |
569 | *y = m_yScrollPixelsPerLine * m_yScrollLines; | |
570 | } | |
571 | ||
572 | // Where the current view starts from | |
573 | void wxScrolledWindow::GetViewStart (int *x, int *y) const | |
574 | { | |
575 | if ( x ) | |
576 | *x = m_xScrollPosition; | |
577 | if ( y ) | |
578 | *y = m_yScrollPosition; | |
579 | } | |
580 | ||
581 | void wxScrolledWindow::CalcScrolledPosition(int x, int y, int *xx, int *yy) const | |
582 | { | |
583 | if ( xx ) | |
584 | *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; | |
585 | if ( yy ) | |
586 | *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; | |
587 | } | |
588 | ||
589 | void wxScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const | |
590 | { | |
591 | if ( xx ) | |
592 | *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; | |
593 | if ( yy ) | |
594 | *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine; | |
595 | } | |
596 | ||
597 | // ---------------------------------------------------------------------------- | |
598 | // event handlers | |
599 | // ---------------------------------------------------------------------------- | |
600 | ||
601 | // Default OnSize resets scrollbars, if any | |
602 | void wxScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event)) | |
603 | { | |
604 | #if wxUSE_CONSTRAINTS | |
605 | if (GetAutoLayout()) | |
606 | Layout(); | |
607 | #endif | |
608 | ||
609 | AdjustScrollbars(); | |
610 | } | |
611 | ||
612 | // This calls OnDraw, having adjusted the origin according to the current | |
613 | // scroll position | |
614 | void wxScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event)) | |
615 | { | |
616 | wxPaintDC dc(this); | |
617 | PrepareDC(dc); | |
618 | ||
619 | OnDraw(dc); | |
620 | } | |
621 | ||
622 | // kbd handling: notice that we use OnChar() and not OnKeyDown() for | |
623 | // compatibility here - if we used OnKeyDown(), the programs which process | |
624 | // arrows themselves in their OnChar() would never get the message and like | |
625 | // this they always have the priority | |
626 | void wxScrolledWindow::OnChar(wxKeyEvent& event) | |
627 | { | |
628 | int stx, sty, // view origin | |
629 | szx, szy, // view size (total) | |
630 | clix, cliy; // view size (on screen) | |
631 | ||
632 | ViewStart(&stx, &sty); | |
633 | GetClientSize(&clix, &cliy); | |
634 | GetVirtualSize(&szx, &szy); | |
635 | ||
636 | if( m_xScrollPixelsPerLine ) | |
637 | { | |
638 | clix /= m_xScrollPixelsPerLine; | |
639 | szx /= m_xScrollPixelsPerLine; | |
640 | } | |
641 | else | |
642 | { | |
643 | clix = 0; | |
644 | szx = -1; | |
645 | } | |
646 | if( m_yScrollPixelsPerLine ) | |
647 | { | |
648 | cliy /= m_yScrollPixelsPerLine; | |
649 | szy /= m_yScrollPixelsPerLine; | |
650 | } | |
651 | else | |
652 | { | |
653 | cliy = 0; | |
654 | szy = -1; | |
655 | } | |
656 | ||
657 | switch ( event.KeyCode() ) | |
658 | { | |
659 | case WXK_PAGEUP: | |
660 | case WXK_PRIOR: | |
661 | Scroll(-1, sty - (5 * cliy / 6)); | |
662 | break; | |
663 | ||
664 | case WXK_PAGEDOWN: | |
665 | case WXK_NEXT: | |
666 | Scroll(-1, sty + (5 * cliy / 6)); | |
667 | break; | |
668 | ||
669 | case WXK_HOME: | |
670 | Scroll(0, event.ControlDown() ? 0 : -1); | |
671 | break; | |
672 | ||
673 | case WXK_END: | |
674 | Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1); | |
675 | break; | |
676 | ||
677 | case WXK_UP: | |
678 | Scroll(-1, sty - 1); | |
679 | break; | |
680 | ||
681 | case WXK_DOWN: | |
682 | Scroll(-1, sty + 1); | |
683 | break; | |
684 | ||
685 | case WXK_LEFT: | |
686 | Scroll(stx - 1, -1); | |
687 | break; | |
688 | ||
689 | case WXK_RIGHT: | |
690 | Scroll(stx + 1, -1); | |
691 | break; | |
692 | ||
693 | default: | |
694 | // not for us | |
695 | event.Skip(); | |
696 | } | |
697 | } |