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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: generic/scrolwin.cpp | |
3 | // Purpose: wxGenericScrolledWindow 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 | #ifdef __VMS | |
25 | #define XtDisplay XTDISPLAY | |
26 | #endif | |
27 | ||
28 | // For compilers that support precompilation, includes "wx.h". | |
29 | #include "wx/wxprec.h" | |
30 | ||
31 | #ifdef __BORLANDC__ | |
32 | #pragma hdrstop | |
33 | #endif | |
34 | ||
35 | #include "wx/utils.h" | |
36 | #include "wx/dcclient.h" | |
37 | ||
38 | #include "wx/generic/scrolwin.h" | |
39 | #include "wx/panel.h" | |
40 | ||
41 | #ifdef __WXMSW__ | |
42 | #include "windows.h" | |
43 | #endif | |
44 | ||
45 | #ifdef __WXMOTIF__ | |
46 | // For wxRETAINED implementation | |
47 | #ifdef __VMS__ //VMS's Xm.h is not (yet) compatible with C++ | |
48 | //This code switches off the compiler warnings | |
49 | # pragma message disable nosimpint | |
50 | #endif | |
51 | #include <Xm/Xm.h> | |
52 | #ifdef __VMS__ | |
53 | # pragma message enable nosimpint | |
54 | #endif | |
55 | #endif | |
56 | ||
57 | #ifndef __WXGTK__ | |
58 | #include "wx/scrolwin.h" | |
59 | IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow) | |
60 | #endif | |
61 | ||
62 | // ---------------------------------------------------------------------------- | |
63 | // event tables | |
64 | // ---------------------------------------------------------------------------- | |
65 | ||
66 | BEGIN_EVENT_TABLE(wxGenericScrolledWindow, wxPanel) | |
67 | EVT_SCROLLWIN(wxGenericScrolledWindow::OnScroll) | |
68 | EVT_SIZE(wxGenericScrolledWindow::OnSize) | |
69 | EVT_PAINT(wxGenericScrolledWindow::OnPaint) | |
70 | EVT_CHAR(wxGenericScrolledWindow::OnChar) | |
71 | EVT_MOUSEWHEEL(wxGenericScrolledWindow::OnMouseWheel) | |
72 | END_EVENT_TABLE() | |
73 | ||
74 | IMPLEMENT_DYNAMIC_CLASS(wxGenericScrolledWindow, wxPanel) | |
75 | ||
76 | // ============================================================================ | |
77 | // implementation | |
78 | // ============================================================================ | |
79 | ||
80 | // ---------------------------------------------------------------------------- | |
81 | // wxGenericScrolledWindow creation | |
82 | // ---------------------------------------------------------------------------- | |
83 | ||
84 | wxGenericScrolledWindow::wxGenericScrolledWindow() | |
85 | { | |
86 | m_xScrollPixelsPerLine = 0; | |
87 | m_yScrollPixelsPerLine = 0; | |
88 | m_xScrollingEnabled = TRUE; | |
89 | m_yScrollingEnabled = TRUE; | |
90 | m_xScrollPosition = 0; | |
91 | m_yScrollPosition = 0; | |
92 | m_xScrollLines = 0; | |
93 | m_yScrollLines = 0; | |
94 | m_xScrollLinesPerPage = 0; | |
95 | m_yScrollLinesPerPage = 0; | |
96 | m_scaleX = 1.0; | |
97 | m_scaleY = 1.0; | |
98 | m_wheelRotation = 0; | |
99 | m_targetWindow = (wxWindow*) NULL; | |
100 | } | |
101 | ||
102 | bool wxGenericScrolledWindow::Create(wxWindow *parent, | |
103 | wxWindowID id, | |
104 | const wxPoint& pos, | |
105 | const wxSize& size, | |
106 | long style, | |
107 | const wxString& name) | |
108 | { | |
109 | m_xScrollPixelsPerLine = 0; | |
110 | m_yScrollPixelsPerLine = 0; | |
111 | m_xScrollingEnabled = TRUE; | |
112 | m_yScrollingEnabled = TRUE; | |
113 | m_xScrollPosition = 0; | |
114 | m_yScrollPosition = 0; | |
115 | m_xScrollLines = 0; | |
116 | m_yScrollLines = 0; | |
117 | m_xScrollLinesPerPage = 0; | |
118 | m_yScrollLinesPerPage = 0; | |
119 | m_scaleX = 1.0; | |
120 | m_scaleY = 1.0; | |
121 | m_wheelRotation = 0; | |
122 | ||
123 | m_targetWindow = this; | |
124 | ||
125 | bool ok = wxPanel::Create(parent, id, pos, size, style, name); | |
126 | ||
127 | #ifdef __WXMSW__ | |
128 | // we need to process arrows ourselves for scrolling | |
129 | m_lDlgCode |= DLGC_WANTARROWS; | |
130 | #endif // __WXMSW__ | |
131 | ||
132 | return ok; | |
133 | } | |
134 | ||
135 | wxGenericScrolledWindow::~wxGenericScrolledWindow() | |
136 | { | |
137 | } | |
138 | ||
139 | // ---------------------------------------------------------------------------- | |
140 | // setting scrolling parameters | |
141 | // ---------------------------------------------------------------------------- | |
142 | ||
143 | /* | |
144 | * pixelsPerUnitX/pixelsPerUnitY: number of pixels per unit (e.g. pixels per text line) | |
145 | * noUnitsX/noUnitsY: : no. units per scrollbar | |
146 | */ | |
147 | void wxGenericScrolledWindow::SetScrollbars (int pixelsPerUnitX, int pixelsPerUnitY, | |
148 | int noUnitsX, int noUnitsY, | |
149 | int xPos, int yPos, bool noRefresh ) | |
150 | { | |
151 | int xpos, ypos; | |
152 | ||
153 | CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos); | |
154 | bool do_refresh = | |
155 | ( | |
156 | (noUnitsX != 0 && m_xScrollLines == 0) || | |
157 | (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX*noUnitsX) || | |
158 | ||
159 | (noUnitsY != 0 && m_yScrollLines == 0) || | |
160 | (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY*noUnitsY) || | |
161 | (xPos != m_xScrollPosition) || | |
162 | (yPos != m_yScrollPosition) | |
163 | // (pixelsPerUnitX != m_xScrollPixelsPerLine) || | |
164 | // (pixelsPerUnitY != m_yScrollPixelsPerLine) | |
165 | ); | |
166 | ||
167 | m_xScrollPixelsPerLine = pixelsPerUnitX; | |
168 | m_yScrollPixelsPerLine = pixelsPerUnitY; | |
169 | m_xScrollPosition = xPos; | |
170 | m_yScrollPosition = yPos; | |
171 | m_xScrollLines = noUnitsX; | |
172 | m_yScrollLines = noUnitsY; | |
173 | ||
174 | #ifdef __WXMOTIF__ | |
175 | // Sorry, some Motif-specific code to implement a backing pixmap | |
176 | // for the wxRETAINED style. Implementing a backing store can't | |
177 | // be entirely generic because it relies on the wxWindowDC implementation | |
178 | // to duplicate X drawing calls for the backing pixmap. | |
179 | ||
180 | if ((m_windowStyle & wxRETAINED) == wxRETAINED) | |
181 | { | |
182 | Display* dpy = XtDisplay((Widget) GetMainWidget()); | |
183 | ||
184 | int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; | |
185 | int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; | |
186 | if (m_backingPixmap && | |
187 | !((m_pixmapWidth == totalPixelWidth) && | |
188 | (m_pixmapHeight == totalPixelHeight))) | |
189 | { | |
190 | XFreePixmap (dpy, (Pixmap) m_backingPixmap); | |
191 | m_backingPixmap = (WXPixmap) 0; | |
192 | } | |
193 | ||
194 | if (!m_backingPixmap && | |
195 | (noUnitsX != 0) && (noUnitsY != 0)) | |
196 | { | |
197 | int depth = wxDisplayDepth(); | |
198 | m_pixmapWidth = totalPixelWidth; | |
199 | m_pixmapHeight = totalPixelHeight; | |
200 | m_backingPixmap = (WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), | |
201 | m_pixmapWidth, m_pixmapHeight, depth); | |
202 | } | |
203 | ||
204 | } | |
205 | #endif // Motif | |
206 | ||
207 | AdjustScrollbars(); | |
208 | ||
209 | if (do_refresh && !noRefresh) | |
210 | m_targetWindow->Refresh(); | |
211 | ||
212 | #ifdef __WXMSW__ | |
213 | // GRG: if this turns out to be really necessary, we could | |
214 | // at least move it to the above if { ... } so that it is | |
215 | // only done if noRefresh = FALSE (the default). OTOH, if | |
216 | // this doesn't break anything, which seems to be the | |
217 | // case, we could just leave it out. | |
218 | ||
219 | // Necessary? | |
220 | // UpdateWindow ((HWND) m_targetWindow->GetHWND()); | |
221 | #endif | |
222 | #ifdef __WXMAC__ | |
223 | m_targetWindow->MacUpdateImmediately() ; | |
224 | #endif | |
225 | } | |
226 | ||
227 | // ---------------------------------------------------------------------------- | |
228 | // target window handling | |
229 | // ---------------------------------------------------------------------------- | |
230 | ||
231 | void wxGenericScrolledWindow::SetTargetWindow( wxWindow *target ) | |
232 | { | |
233 | wxASSERT_MSG( target, wxT("target window must not be NULL") ); | |
234 | m_targetWindow = target; | |
235 | } | |
236 | ||
237 | wxWindow *wxGenericScrolledWindow::GetTargetWindow() | |
238 | { | |
239 | return m_targetWindow; | |
240 | } | |
241 | ||
242 | // ---------------------------------------------------------------------------- | |
243 | // scrolling implementation itself | |
244 | // ---------------------------------------------------------------------------- | |
245 | ||
246 | void wxGenericScrolledWindow::OnScroll(wxScrollWinEvent& event) | |
247 | { | |
248 | int orient = event.GetOrientation(); | |
249 | ||
250 | int nScrollInc = CalcScrollInc(event); | |
251 | if (nScrollInc == 0) return; | |
252 | ||
253 | if (orient == wxHORIZONTAL) | |
254 | { | |
255 | int newPos = m_xScrollPosition + nScrollInc; | |
256 | SetScrollPos(wxHORIZONTAL, newPos, TRUE ); | |
257 | } | |
258 | else | |
259 | { | |
260 | int newPos = m_yScrollPosition + nScrollInc; | |
261 | SetScrollPos(wxVERTICAL, newPos, TRUE ); | |
262 | } | |
263 | ||
264 | if (orient == wxHORIZONTAL) | |
265 | { | |
266 | m_xScrollPosition += nScrollInc; | |
267 | } | |
268 | else | |
269 | { | |
270 | m_yScrollPosition += nScrollInc; | |
271 | } | |
272 | ||
273 | if (orient == wxHORIZONTAL) | |
274 | { | |
275 | if (m_xScrollingEnabled) | |
276 | m_targetWindow->ScrollWindow(-m_xScrollPixelsPerLine * nScrollInc, 0, (const wxRect *) NULL); | |
277 | else | |
278 | m_targetWindow->Refresh(); | |
279 | } | |
280 | else | |
281 | { | |
282 | if (m_yScrollingEnabled) | |
283 | m_targetWindow->ScrollWindow(0, -m_yScrollPixelsPerLine * nScrollInc, (const wxRect *) NULL); | |
284 | else | |
285 | m_targetWindow->Refresh(); | |
286 | } | |
287 | #ifdef __WXMAC__ | |
288 | m_targetWindow->MacUpdateImmediately() ; | |
289 | #endif | |
290 | } | |
291 | ||
292 | int wxGenericScrolledWindow::CalcScrollInc(wxScrollWinEvent& event) | |
293 | { | |
294 | int pos = event.GetPosition(); | |
295 | int orient = event.GetOrientation(); | |
296 | ||
297 | int nScrollInc = 0; | |
298 | if (event.GetEventType() == wxEVT_SCROLLWIN_TOP) | |
299 | { | |
300 | if (orient == wxHORIZONTAL) | |
301 | nScrollInc = - m_xScrollPosition; | |
302 | else | |
303 | nScrollInc = - m_yScrollPosition; | |
304 | } else | |
305 | if (event.GetEventType() == wxEVT_SCROLLWIN_BOTTOM) | |
306 | { | |
307 | if (orient == wxHORIZONTAL) | |
308 | nScrollInc = m_xScrollLines - m_xScrollPosition; | |
309 | else | |
310 | nScrollInc = m_yScrollLines - m_yScrollPosition; | |
311 | } else | |
312 | if (event.GetEventType() == wxEVT_SCROLLWIN_LINEUP) | |
313 | { | |
314 | nScrollInc = -1; | |
315 | } else | |
316 | if (event.GetEventType() == wxEVT_SCROLLWIN_LINEDOWN) | |
317 | { | |
318 | nScrollInc = 1; | |
319 | } else | |
320 | if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEUP) | |
321 | { | |
322 | if (orient == wxHORIZONTAL) | |
323 | nScrollInc = -GetScrollPageSize(wxHORIZONTAL); | |
324 | else | |
325 | nScrollInc = -GetScrollPageSize(wxVERTICAL); | |
326 | } else | |
327 | if (event.GetEventType() == wxEVT_SCROLLWIN_PAGEDOWN) | |
328 | { | |
329 | if (orient == wxHORIZONTAL) | |
330 | nScrollInc = GetScrollPageSize(wxHORIZONTAL); | |
331 | else | |
332 | nScrollInc = GetScrollPageSize(wxVERTICAL); | |
333 | } else | |
334 | if ((event.GetEventType() == wxEVT_SCROLLWIN_THUMBTRACK) || | |
335 | (event.GetEventType() == wxEVT_SCROLLWIN_THUMBRELEASE)) | |
336 | { | |
337 | if (orient == wxHORIZONTAL) | |
338 | nScrollInc = pos - m_xScrollPosition; | |
339 | else | |
340 | nScrollInc = pos - m_yScrollPosition; | |
341 | } | |
342 | ||
343 | if (orient == wxHORIZONTAL) | |
344 | { | |
345 | if (m_xScrollPixelsPerLine > 0) | |
346 | { | |
347 | int w, h; | |
348 | m_targetWindow->GetClientSize(&w, &h); | |
349 | ||
350 | int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine; | |
351 | int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
352 | if (noPositions < 0) | |
353 | noPositions = 0; | |
354 | ||
355 | if ( (m_xScrollPosition + nScrollInc) < 0 ) | |
356 | nScrollInc = -m_xScrollPosition; // As -ve as we can go | |
357 | else if ( (m_xScrollPosition + nScrollInc) > noPositions ) | |
358 | nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go | |
359 | } | |
360 | else | |
361 | m_targetWindow->Refresh(); | |
362 | } | |
363 | else | |
364 | { | |
365 | if (m_yScrollPixelsPerLine > 0) | |
366 | { | |
367 | int w, h; | |
368 | m_targetWindow->GetClientSize(&w, &h); | |
369 | ||
370 | int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; | |
371 | int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
372 | if (noPositions < 0) | |
373 | noPositions = 0; | |
374 | ||
375 | if ( (m_yScrollPosition + nScrollInc) < 0 ) | |
376 | nScrollInc = -m_yScrollPosition; // As -ve as we can go | |
377 | else if ( (m_yScrollPosition + nScrollInc) > noPositions ) | |
378 | nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go | |
379 | } | |
380 | else | |
381 | m_targetWindow->Refresh(); | |
382 | } | |
383 | ||
384 | return nScrollInc; | |
385 | } | |
386 | ||
387 | // Adjust the scrollbars - new version. | |
388 | void wxGenericScrolledWindow::AdjustScrollbars() | |
389 | { | |
390 | int w, h; | |
391 | m_targetWindow->GetClientSize(&w, &h); | |
392 | ||
393 | int oldXScroll = m_xScrollPosition; | |
394 | int oldYScroll = m_yScrollPosition; | |
395 | ||
396 | if (m_xScrollLines > 0) | |
397 | { | |
398 | // Calculate page size i.e. number of scroll units you get on the | |
399 | // current client window | |
400 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
401 | if (noPagePositions < 1) noPagePositions = 1; | |
402 | ||
403 | // Correct position if greater than extent of canvas minus | |
404 | // the visible portion of it or if below zero | |
405 | m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition); | |
406 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
407 | ||
408 | SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines); | |
409 | // The amount by which we scroll when paging | |
410 | SetScrollPageSize(wxHORIZONTAL, noPagePositions); | |
411 | } | |
412 | else | |
413 | { | |
414 | m_xScrollPosition = 0; | |
415 | SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE); | |
416 | } | |
417 | ||
418 | if (m_yScrollLines > 0) | |
419 | { | |
420 | // Calculate page size i.e. number of scroll units you get on the | |
421 | // current client window | |
422 | int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
423 | if (noPagePositions < 1) noPagePositions = 1; | |
424 | ||
425 | // Correct position if greater than extent of canvas minus | |
426 | // the visible portion of it or if below zero | |
427 | m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition ); | |
428 | m_yScrollPosition = wxMax( 0, m_yScrollPosition ); | |
429 | ||
430 | SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines); | |
431 | // The amount by which we scroll when paging | |
432 | SetScrollPageSize(wxVERTICAL, noPagePositions); | |
433 | } | |
434 | else | |
435 | { | |
436 | m_yScrollPosition = 0; | |
437 | SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); | |
438 | } | |
439 | ||
440 | if (oldXScroll != m_xScrollPosition) | |
441 | { | |
442 | if (m_xScrollingEnabled) | |
443 | m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll-m_xScrollPosition), 0, (const wxRect *) NULL ); | |
444 | else | |
445 | m_targetWindow->Refresh(); | |
446 | } | |
447 | ||
448 | if (oldYScroll != m_yScrollPosition) | |
449 | { | |
450 | if (m_yScrollingEnabled) | |
451 | m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), (const wxRect *) NULL ); | |
452 | else | |
453 | m_targetWindow->Refresh(); | |
454 | } | |
455 | } | |
456 | ||
457 | // Override this function if you don't want to have wxGenericScrolledWindow | |
458 | // automatically change the origin according to the scroll position. | |
459 | void wxGenericScrolledWindow::PrepareDC(wxDC& dc) | |
460 | { | |
461 | dc.SetDeviceOrigin( -m_xScrollPosition * m_xScrollPixelsPerLine, | |
462 | -m_yScrollPosition * m_yScrollPixelsPerLine ); | |
463 | dc.SetUserScale( m_scaleX, m_scaleY ); | |
464 | } | |
465 | ||
466 | #if WXWIN_COMPATIBILITY | |
467 | void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const | |
468 | { | |
469 | *x_page = GetScrollPageSize(wxHORIZONTAL); | |
470 | *y_page = GetScrollPageSize(wxVERTICAL); | |
471 | } | |
472 | ||
473 | void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const | |
474 | { | |
475 | if ( xx ) | |
476 | *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine); | |
477 | if ( yy ) | |
478 | *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine); | |
479 | } | |
480 | #endif // WXWIN_COMPATIBILITY | |
481 | ||
482 | void wxGenericScrolledWindow::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const | |
483 | { | |
484 | if ( x_unit ) | |
485 | *x_unit = m_xScrollPixelsPerLine; | |
486 | if ( y_unit ) | |
487 | *y_unit = m_yScrollPixelsPerLine; | |
488 | } | |
489 | ||
490 | int wxGenericScrolledWindow::GetScrollPageSize(int orient) const | |
491 | { | |
492 | if ( orient == wxHORIZONTAL ) | |
493 | return m_xScrollLinesPerPage; | |
494 | else | |
495 | return m_yScrollLinesPerPage; | |
496 | } | |
497 | ||
498 | void wxGenericScrolledWindow::SetScrollPageSize(int orient, int pageSize) | |
499 | { | |
500 | if ( orient == wxHORIZONTAL ) | |
501 | m_xScrollLinesPerPage = pageSize; | |
502 | else | |
503 | m_yScrollLinesPerPage = pageSize; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Scroll to given position (scroll position, not pixel position) | |
508 | */ | |
509 | void wxGenericScrolledWindow::Scroll( int x_pos, int y_pos ) | |
510 | { | |
511 | if (!m_targetWindow) | |
512 | return; | |
513 | ||
514 | if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && | |
515 | ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; | |
516 | ||
517 | int w, h; | |
518 | m_targetWindow->GetClientSize(&w, &h); | |
519 | ||
520 | if ((x_pos != -1) && (m_xScrollPixelsPerLine)) | |
521 | { | |
522 | int old_x = m_xScrollPosition; | |
523 | m_xScrollPosition = x_pos; | |
524 | ||
525 | // Calculate page size i.e. number of scroll units you get on the | |
526 | // current client window | |
527 | int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 ); | |
528 | if (noPagePositions < 1) noPagePositions = 1; | |
529 | ||
530 | // Correct position if greater than extent of canvas minus | |
531 | // the visible portion of it or if below zero | |
532 | m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition ); | |
533 | m_xScrollPosition = wxMax( 0, m_xScrollPosition ); | |
534 | ||
535 | if (old_x != m_xScrollPosition) { | |
536 | m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition, TRUE ); | |
537 | m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0 ); | |
538 | } | |
539 | } | |
540 | if ((y_pos != -1) && (m_yScrollPixelsPerLine)) | |
541 | { | |
542 | int old_y = m_yScrollPosition; | |
543 | m_yScrollPosition = y_pos; | |
544 | ||
545 | // Calculate page size i.e. number of scroll units you get on the | |
546 | // current client window | |
547 | int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); | |
548 | if (noPagePositions < 1) noPagePositions = 1; | |
549 | ||
550 | // Correct position if greater than extent of canvas minus | |
551 | // the visible portion of it or if below zero | |
552 | m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition ); | |
553 | m_yScrollPosition = wxMax( 0, m_yScrollPosition ); | |
554 | ||
555 | if (old_y != m_yScrollPosition) { | |
556 | m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition, TRUE ); | |
557 | m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine ); | |
558 | } | |
559 | } | |
560 | ||
561 | #ifdef __WXMAC__ | |
562 | m_targetWindow->MacUpdateImmediately(); | |
563 | #endif | |
564 | } | |
565 | ||
566 | void wxGenericScrolledWindow::EnableScrolling (bool x_scroll, bool y_scroll) | |
567 | { | |
568 | m_xScrollingEnabled = x_scroll; | |
569 | m_yScrollingEnabled = y_scroll; | |
570 | } | |
571 | ||
572 | void wxGenericScrolledWindow::GetVirtualSize (int *x, int *y) const | |
573 | { | |
574 | if ( x ) | |
575 | *x = m_xScrollPixelsPerLine * m_xScrollLines; | |
576 | if ( y ) | |
577 | *y = m_yScrollPixelsPerLine * m_yScrollLines; | |
578 | } | |
579 | ||
580 | // Where the current view starts from | |
581 | void wxGenericScrolledWindow::GetViewStart (int *x, int *y) const | |
582 | { | |
583 | if ( x ) | |
584 | *x = m_xScrollPosition; | |
585 | if ( y ) | |
586 | *y = m_yScrollPosition; | |
587 | } | |
588 | ||
589 | void wxGenericScrolledWindow::CalcScrolledPosition(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 | void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const | |
598 | { | |
599 | if ( xx ) | |
600 | *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; | |
601 | if ( yy ) | |
602 | *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine; | |
603 | } | |
604 | ||
605 | // ---------------------------------------------------------------------------- | |
606 | // event handlers | |
607 | // ---------------------------------------------------------------------------- | |
608 | ||
609 | // Default OnSize resets scrollbars, if any | |
610 | void wxGenericScrolledWindow::OnSize(wxSizeEvent& WXUNUSED(event)) | |
611 | { | |
612 | #if wxUSE_CONSTRAINTS | |
613 | if (GetAutoLayout()) | |
614 | Layout(); | |
615 | #endif | |
616 | ||
617 | AdjustScrollbars(); | |
618 | } | |
619 | ||
620 | // This calls OnDraw, having adjusted the origin according to the current | |
621 | // scroll position | |
622 | void wxGenericScrolledWindow::OnPaint(wxPaintEvent& WXUNUSED(event)) | |
623 | { | |
624 | wxPaintDC dc(this); | |
625 | PrepareDC(dc); | |
626 | ||
627 | OnDraw(dc); | |
628 | } | |
629 | ||
630 | // kbd handling: notice that we use OnChar() and not OnKeyDown() for | |
631 | // compatibility here - if we used OnKeyDown(), the programs which process | |
632 | // arrows themselves in their OnChar() would never get the message and like | |
633 | // this they always have the priority | |
634 | void wxGenericScrolledWindow::OnChar(wxKeyEvent& event) | |
635 | { | |
636 | int stx, sty, // view origin | |
637 | szx, szy, // view size (total) | |
638 | clix, cliy; // view size (on screen) | |
639 | ||
640 | ViewStart(&stx, &sty); | |
641 | GetClientSize(&clix, &cliy); | |
642 | GetVirtualSize(&szx, &szy); | |
643 | ||
644 | if( m_xScrollPixelsPerLine ) | |
645 | { | |
646 | clix /= m_xScrollPixelsPerLine; | |
647 | szx /= m_xScrollPixelsPerLine; | |
648 | } | |
649 | else | |
650 | { | |
651 | clix = 0; | |
652 | szx = -1; | |
653 | } | |
654 | if( m_yScrollPixelsPerLine ) | |
655 | { | |
656 | cliy /= m_yScrollPixelsPerLine; | |
657 | szy /= m_yScrollPixelsPerLine; | |
658 | } | |
659 | else | |
660 | { | |
661 | cliy = 0; | |
662 | szy = -1; | |
663 | } | |
664 | ||
665 | int dsty; | |
666 | switch ( event.KeyCode() ) | |
667 | { | |
668 | case WXK_PAGEUP: | |
669 | case WXK_PRIOR: | |
670 | dsty = sty - (5 * cliy / 6); | |
671 | Scroll(-1, (dsty == -1) ? 0 : dsty); | |
672 | break; | |
673 | ||
674 | case WXK_PAGEDOWN: | |
675 | case WXK_NEXT: | |
676 | Scroll(-1, sty + (5 * cliy / 6)); | |
677 | break; | |
678 | ||
679 | case WXK_HOME: | |
680 | Scroll(0, event.ControlDown() ? 0 : -1); | |
681 | break; | |
682 | ||
683 | case WXK_END: | |
684 | Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1); | |
685 | break; | |
686 | ||
687 | case WXK_UP: | |
688 | Scroll(-1, sty - 1); | |
689 | break; | |
690 | ||
691 | case WXK_DOWN: | |
692 | Scroll(-1, sty + 1); | |
693 | break; | |
694 | ||
695 | case WXK_LEFT: | |
696 | Scroll(stx - 1, -1); | |
697 | break; | |
698 | ||
699 | case WXK_RIGHT: | |
700 | Scroll(stx + 1, -1); | |
701 | break; | |
702 | ||
703 | default: | |
704 | // not for us | |
705 | event.Skip(); | |
706 | } | |
707 | } | |
708 | ||
709 | ||
710 | void wxGenericScrolledWindow::OnMouseWheel(wxMouseEvent& event) | |
711 | { | |
712 | int lines; | |
713 | int vsx, vsy; | |
714 | ||
715 | m_wheelRotation += event.GetWheelRotation(); | |
716 | lines = m_wheelRotation / event.GetWheelDelta(); | |
717 | m_wheelRotation -= lines * event.GetWheelDelta(); | |
718 | ||
719 | if (lines != 0) { | |
720 | lines *= event.GetLinesPerAction(); | |
721 | GetViewStart(&vsx, &vsy); | |
722 | Scroll(-1, vsy - lines); | |
723 | } | |
724 | } | |
725 | ||
726 | ||
727 | ||
728 |