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68be9f09 JS |
1 | ///////////////////////////////////////////////////////////////////////////// |
2 | // Name: dragimgg.cpp | |
3 | // Purpose: Generic wxDragImage implementation | |
4 | // Author: Julian Smart | |
5 | // Modified by: | |
6 | // Created: 29/2/2000 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) Julian Smart | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | // ============================================================================ | |
13 | // declarations | |
14 | // ============================================================================ | |
15 | ||
16 | // ---------------------------------------------------------------------------- | |
17 | // headers | |
18 | // ---------------------------------------------------------------------------- | |
19 | ||
20 | #ifdef __GNUG__ | |
21 | #pragma implementation "dragimgg.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 | ||
1e6feb95 VZ |
31 | #if wxUSE_DRAGIMAGE |
32 | ||
68be9f09 JS |
33 | #ifndef WX_PRECOMP |
34 | #include <stdio.h> | |
35 | #include "wx/setup.h" | |
36 | #include "wx/window.h" | |
37 | #include "wx/frame.h" | |
38 | #include "wx/dcclient.h" | |
39 | #include "wx/dcscreen.h" | |
40 | #include "wx/dcmemory.h" | |
41 | #include "wx/settings.h" | |
42 | #endif | |
43 | ||
44 | #include "wx/log.h" | |
45 | #include "wx/intl.h" | |
46 | ||
47 | #ifdef __WIN16__ | |
48 | #define wxUSE_IMAGE_IN_DRAGIMAGE 0 | |
49 | #else | |
50 | #define wxUSE_IMAGE_IN_DRAGIMAGE 1 | |
51 | #endif | |
52 | ||
53 | #if wxUSE_IMAGE_IN_DRAGIMAGE | |
54 | #include "wx/image.h" | |
55 | #endif | |
56 | ||
57 | #include "wx/generic/dragimgg.h" | |
58 | ||
59 | // ---------------------------------------------------------------------------- | |
60 | // macros | |
61 | // ---------------------------------------------------------------------------- | |
62 | ||
63 | IMPLEMENT_DYNAMIC_CLASS(wxGenericDragImage, wxObject) | |
64 | ||
65 | // ============================================================================ | |
66 | // implementation | |
67 | // ============================================================================ | |
68 | ||
69 | // ---------------------------------------------------------------------------- | |
70 | // wxGenericDragImage ctors/dtor | |
71 | // ---------------------------------------------------------------------------- | |
72 | ||
68be9f09 JS |
73 | wxGenericDragImage::~wxGenericDragImage() |
74 | { | |
75 | if (m_windowDC) | |
76 | { | |
77 | delete m_windowDC; | |
78 | } | |
79 | } | |
80 | ||
81 | void wxGenericDragImage::Init() | |
82 | { | |
83 | m_isDirty = FALSE; | |
84 | m_isShown = FALSE; | |
85 | m_windowDC = (wxDC*) NULL; | |
86 | m_window = (wxWindow*) NULL; | |
87 | m_fullScreen = FALSE; | |
f6bcfd97 | 88 | m_pBackingBitmap = (wxBitmap*) NULL; |
68be9f09 JS |
89 | } |
90 | ||
91 | // Attributes | |
92 | //////////////////////////////////////////////////////////////////////////// | |
93 | ||
94 | ||
95 | // Operations | |
96 | //////////////////////////////////////////////////////////////////////////// | |
97 | ||
f6bcfd97 | 98 | // Create a drag image with a virtual image (need to override DoDrawImage, GetImageRect) |
aa2d25a5 | 99 | bool wxGenericDragImage::Create(const wxCursor& cursor) |
f6bcfd97 BP |
100 | { |
101 | m_cursor = cursor; | |
f6bcfd97 BP |
102 | |
103 | return TRUE; | |
104 | } | |
105 | ||
68be9f09 | 106 | // Create a drag image from a bitmap and optional cursor |
aa2d25a5 | 107 | bool wxGenericDragImage::Create(const wxBitmap& image, const wxCursor& cursor) |
68be9f09 JS |
108 | { |
109 | // We don't have to combine the cursor explicitly since we simply show the cursor | |
110 | // as we drag. This currently will only work within one window. | |
111 | ||
112 | m_cursor = cursor; | |
68be9f09 JS |
113 | m_bitmap = image; |
114 | ||
115 | return TRUE ; | |
116 | } | |
117 | ||
118 | // Create a drag image from an icon and optional cursor | |
aa2d25a5 | 119 | bool wxGenericDragImage::Create(const wxIcon& image, const wxCursor& cursor) |
68be9f09 JS |
120 | { |
121 | // We don't have to combine the cursor explicitly since we simply show the cursor | |
122 | // as we drag. This currently will only work within one window. | |
123 | ||
124 | m_cursor = cursor; | |
68be9f09 JS |
125 | m_icon = image; |
126 | ||
127 | return TRUE ; | |
128 | } | |
129 | ||
130 | // Create a drag image from a string and optional cursor | |
aa2d25a5 | 131 | bool wxGenericDragImage::Create(const wxString& str, const wxCursor& cursor) |
68be9f09 | 132 | { |
a756f210 | 133 | wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)); |
68be9f09 JS |
134 | |
135 | long w, h; | |
136 | wxScreenDC dc; | |
137 | dc.SetFont(font); | |
138 | dc.GetTextExtent(str, & w, & h); | |
139 | dc.SetFont(wxNullFont); | |
140 | ||
141 | wxMemoryDC dc2; | |
142 | dc2.SetFont(font); | |
143 | ||
144 | // Sometimes GetTextExtent isn't accurate enough, so make it longer | |
145 | wxBitmap bitmap((int) ((w+2) * 1.5), (int) h+2); | |
146 | dc2.SelectObject(bitmap); | |
147 | ||
148 | dc2.SetBackground(* wxWHITE_BRUSH); | |
149 | dc2.Clear(); | |
150 | dc2.SetBackgroundMode(wxTRANSPARENT); | |
151 | dc2.SetTextForeground(* wxLIGHT_GREY); | |
152 | dc2.DrawText(str, 0, 0); | |
153 | dc2.DrawText(str, 1, 0); | |
154 | dc2.DrawText(str, 2, 0); | |
155 | dc2.DrawText(str, 1, 1); | |
156 | dc2.DrawText(str, 2, 1); | |
157 | dc2.DrawText(str, 1, 2); | |
158 | dc2.DrawText(str, 2, 2); | |
159 | ||
160 | dc2.SetTextForeground(* wxBLACK); | |
161 | dc2.DrawText(str, 1, 1); | |
162 | ||
163 | dc2.SelectObject(wxNullBitmap); | |
164 | ||
165 | #if wxUSE_IMAGE_IN_DRAGIMAGE | |
166 | // Make the bitmap masked | |
368d59f0 | 167 | wxImage image = bitmap.ConvertToImage(); |
68be9f09 | 168 | image.SetMaskColour(255, 255, 255); |
368d59f0 | 169 | bitmap = wxBitmap(image); |
68be9f09 JS |
170 | #endif |
171 | ||
aa2d25a5 | 172 | return Create(bitmap, cursor); |
68be9f09 JS |
173 | } |
174 | ||
175 | // Create a drag image for the given tree control item | |
176 | bool wxGenericDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id) | |
177 | { | |
178 | wxString str = treeCtrl.GetItemText(id); | |
179 | return Create(str); | |
180 | } | |
181 | ||
182 | // Create a drag image for the given list control item | |
183 | bool wxGenericDragImage::Create(const wxListCtrl& listCtrl, long id) | |
184 | { | |
185 | wxString str = listCtrl.GetItemText(id); | |
186 | return Create(str); | |
187 | } | |
188 | ||
189 | // Begin drag | |
f6bcfd97 | 190 | bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot, |
bc1dcfc1 VZ |
191 | wxWindow* window, |
192 | bool fullScreen, | |
193 | wxRect* rect) | |
68be9f09 JS |
194 | { |
195 | wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag.")); | |
196 | ||
f6bcfd97 BP |
197 | // The image should be offset by this amount |
198 | m_offset = hotspot; | |
68be9f09 JS |
199 | m_window = window; |
200 | m_fullScreen = fullScreen; | |
201 | ||
202 | if (rect) | |
203 | m_boundingRect = * rect; | |
204 | ||
205 | m_isDirty = FALSE; | |
206 | m_isDirty = FALSE; | |
207 | ||
208 | if (window) | |
209 | { | |
210 | window->CaptureMouse(); | |
211 | ||
212 | if (m_cursor.Ok()) | |
213 | { | |
214 | m_oldCursor = window->GetCursor(); | |
215 | window->SetCursor(m_cursor); | |
216 | } | |
217 | } | |
218 | ||
219 | // Make a copy of the window so we can repair damage done as the image is | |
220 | // dragged. | |
221 | ||
222 | wxSize clientSize; | |
223 | wxPoint pt(0, 0); | |
224 | if (!m_fullScreen) | |
225 | { | |
226 | clientSize = window->GetClientSize(); | |
227 | m_boundingRect.x = 0; m_boundingRect.y = 0; | |
228 | m_boundingRect.width = clientSize.x; m_boundingRect.height = clientSize.y; | |
229 | } | |
230 | else | |
231 | { | |
232 | int w, h; | |
233 | wxDisplaySize(& w, & h); | |
234 | clientSize.x = w; clientSize.y = h; | |
235 | if (rect) | |
236 | { | |
237 | pt.x = m_boundingRect.x; pt.y = m_boundingRect.y; | |
238 | clientSize.x = m_boundingRect.width; clientSize.y = m_boundingRect.height; | |
239 | } | |
240 | else | |
241 | { | |
242 | m_boundingRect.x = 0; m_boundingRect.y = 0; | |
243 | m_boundingRect.width = w; m_boundingRect.height = h; | |
244 | } | |
245 | } | |
246 | ||
f6bcfd97 BP |
247 | wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap); |
248 | ||
249 | if (!backing->Ok() || (backing->GetWidth() < clientSize.x || backing->GetHeight() < clientSize.y)) | |
250 | (*backing) = wxBitmap(clientSize.x, clientSize.y); | |
68be9f09 JS |
251 | |
252 | if (!m_fullScreen) | |
69477ac4 | 253 | { |
68be9f09 | 254 | m_windowDC = new wxClientDC(window); |
69477ac4 | 255 | } |
68be9f09 JS |
256 | else |
257 | { | |
258 | m_windowDC = new wxScreenDC; | |
259 | ||
260 | #if 0 | |
261 | // Use m_boundingRect to limit the area considered. | |
262 | ((wxScreenDC*) m_windowDC)->StartDrawingOnTop(rect); | |
263 | #endif | |
264 | ||
265 | m_windowDC->SetClippingRegion(m_boundingRect.x, m_boundingRect.y, | |
266 | m_boundingRect.width, m_boundingRect.height); | |
267 | } | |
268 | ||
269 | return TRUE; | |
270 | } | |
271 | ||
272 | // Begin drag. hotspot is the location of the drag position relative to the upper-left | |
273 | // corner of the image. This is full screen only. fullScreenRect gives the | |
274 | // position of the window on the screen, to restrict the drag to. | |
275 | bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect) | |
276 | { | |
277 | wxRect rect; | |
278 | ||
279 | int x = fullScreenRect->GetPosition().x; | |
280 | int y = fullScreenRect->GetPosition().y; | |
281 | ||
282 | wxSize sz = fullScreenRect->GetSize(); | |
283 | ||
284 | if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame))) | |
285 | fullScreenRect->GetParent()->ClientToScreen(& x, & y); | |
286 | ||
287 | rect.x = x; rect.y = y; | |
288 | rect.width = sz.x; rect.height = sz.y; | |
289 | ||
290 | return BeginDrag(hotspot, window, TRUE, & rect); | |
291 | } | |
292 | ||
293 | // End drag | |
294 | bool wxGenericDragImage::EndDrag() | |
295 | { | |
296 | if (m_window) | |
297 | { | |
a5e84126 JS |
298 | #ifdef __WXMSW__ |
299 | // Under Windows we can be pretty sure this test will give | |
300 | // the correct results | |
301 | if (wxWindow::GetCapture() == m_window) | |
302 | #endif | |
303 | m_window->ReleaseMouse(); | |
304 | ||
68be9f09 JS |
305 | if (m_cursor.Ok() && m_oldCursor.Ok()) |
306 | { | |
307 | m_window->SetCursor(m_oldCursor); | |
308 | } | |
309 | } | |
310 | ||
311 | if (m_windowDC) | |
312 | { | |
313 | m_windowDC->DestroyClippingRegion(); | |
314 | delete m_windowDC; | |
315 | m_windowDC = (wxDC*) NULL; | |
316 | } | |
317 | ||
318 | m_repairBitmap = wxNullBitmap; | |
319 | ||
320 | return TRUE; | |
321 | } | |
322 | ||
323 | // Move the image: call from OnMouseMove. Pt is in window client coordinates if window | |
324 | // is non-NULL, or in screen coordinates if NULL. | |
325 | bool wxGenericDragImage::Move(const wxPoint& pt) | |
326 | { | |
f6bcfd97 | 327 | wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Move()") ); |
68be9f09 | 328 | |
aa2d25a5 JS |
329 | wxPoint pt2(pt); |
330 | if (m_fullScreen) | |
331 | pt2 = m_window->ClientToScreen(pt); | |
332 | ||
68be9f09 JS |
333 | // Erase at old position, then show at the current position |
334 | wxPoint oldPos = m_position; | |
335 | ||
336 | bool eraseOldImage = (m_isDirty && m_isShown); | |
337 | ||
338 | if (m_isShown) | |
aa2d25a5 | 339 | RedrawImage(oldPos - m_offset, pt2 - m_offset, eraseOldImage, TRUE); |
68be9f09 | 340 | |
aa2d25a5 | 341 | m_position = pt2; |
68be9f09 JS |
342 | |
343 | if (m_isShown) | |
344 | m_isDirty = TRUE; | |
345 | ||
346 | return TRUE; | |
347 | } | |
348 | ||
349 | bool wxGenericDragImage::Show() | |
350 | { | |
f6bcfd97 | 351 | wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Show()") ); |
68be9f09 JS |
352 | |
353 | // Show at the current position | |
354 | ||
355 | if (!m_isShown) | |
356 | { | |
357 | // This is where we restore the backing bitmap, in case | |
358 | // something has changed on the window. | |
359 | ||
f6bcfd97 | 360 | wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap); |
68be9f09 | 361 | wxMemoryDC memDC; |
f6bcfd97 BP |
362 | memDC.SelectObject(* backing); |
363 | ||
364 | UpdateBackingFromWindow(* m_windowDC, memDC, m_boundingRect, wxRect(0, 0, m_boundingRect.width, m_boundingRect.height)); | |
365 | ||
366 | //memDC.Blit(0, 0, m_boundingRect.width, m_boundingRect.height, m_windowDC, m_boundingRect.x, m_boundingRect.y); | |
68be9f09 JS |
367 | memDC.SelectObject(wxNullBitmap); |
368 | ||
f6bcfd97 | 369 | RedrawImage(m_position - m_offset, m_position - m_offset, FALSE, TRUE); |
68be9f09 JS |
370 | } |
371 | ||
372 | m_isShown = TRUE; | |
373 | m_isDirty = TRUE; | |
374 | ||
375 | return TRUE; | |
376 | } | |
377 | ||
f6bcfd97 BP |
378 | bool wxGenericDragImage::UpdateBackingFromWindow(wxDC& windowDC, wxMemoryDC& destDC, |
379 | const wxRect& sourceRect, const wxRect& destRect) const | |
380 | { | |
69477ac4 JS |
381 | return destDC.Blit(destRect.x, destRect.y, destRect.width, destRect.height, & windowDC, |
382 | sourceRect.x, sourceRect.y); | |
f6bcfd97 BP |
383 | } |
384 | ||
68be9f09 JS |
385 | bool wxGenericDragImage::Hide() |
386 | { | |
f6bcfd97 | 387 | wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Hide()") ); |
68be9f09 JS |
388 | |
389 | // Repair the old position | |
390 | ||
391 | if (m_isShown && m_isDirty) | |
392 | { | |
f6bcfd97 | 393 | RedrawImage(m_position - m_offset, m_position - m_offset, TRUE, FALSE); |
68be9f09 JS |
394 | } |
395 | ||
396 | m_isShown = FALSE; | |
397 | m_isDirty = FALSE; | |
398 | ||
399 | return TRUE; | |
400 | } | |
401 | ||
402 | // More efficient: erase and redraw simultaneously if possible | |
403 | bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos, const wxPoint& newPos, | |
404 | bool eraseOld, bool drawNew) | |
405 | { | |
406 | if (!m_windowDC) | |
407 | return FALSE; | |
408 | ||
f6bcfd97 BP |
409 | wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap); |
410 | if (!backing->Ok()) | |
68be9f09 JS |
411 | return FALSE; |
412 | ||
413 | wxRect oldRect(GetImageRect(oldPos)); | |
414 | wxRect newRect(GetImageRect(newPos)); | |
415 | ||
416 | wxRect fullRect; | |
417 | ||
418 | // Full rect: the combination of both rects | |
419 | if (eraseOld && drawNew) | |
420 | { | |
421 | int oldRight = oldRect.GetRight(); | |
422 | int oldBottom = oldRect.GetBottom(); | |
423 | int newRight = newRect.GetRight(); | |
424 | int newBottom = newRect.GetBottom(); | |
425 | ||
426 | wxPoint topLeft = wxPoint(wxMin(oldPos.x, newPos.x), wxMin(oldPos.y, newPos.y)); | |
427 | wxPoint bottomRight = wxPoint(wxMax(oldRight, newRight), wxMax(oldBottom, newBottom)); | |
428 | ||
429 | fullRect.x = topLeft.x; fullRect.y = topLeft.y; | |
430 | fullRect.SetRight(bottomRight.x); | |
431 | fullRect.SetBottom(bottomRight.y); | |
432 | } | |
433 | else if (eraseOld) | |
434 | fullRect = oldRect; | |
435 | else if (drawNew) | |
436 | fullRect = newRect; | |
437 | ||
438 | // Make the bitmap bigger than it need be, so we don't | |
439 | // keep reallocating all the time. | |
440 | int excess = 50; | |
441 | ||
442 | if (!m_repairBitmap.Ok() || (m_repairBitmap.GetWidth() < fullRect.GetWidth() || m_repairBitmap.GetHeight() < fullRect.GetHeight())) | |
443 | { | |
444 | m_repairBitmap = wxBitmap(fullRect.GetWidth() + excess, fullRect.GetHeight() + excess); | |
445 | } | |
446 | ||
447 | wxMemoryDC memDC; | |
f6bcfd97 | 448 | memDC.SelectObject(* backing); |
68be9f09 JS |
449 | |
450 | wxMemoryDC memDCTemp; | |
451 | memDCTemp.SelectObject(m_repairBitmap); | |
452 | ||
453 | // Draw the backing bitmap onto the repair bitmap. | |
454 | // If full-screen, we may have specified the rect on the | |
455 | // screen that we're using for our backing bitmap. | |
456 | // So subtract this when we're blitting from the backing bitmap | |
457 | // (translate from screen to backing-bitmap coords). | |
458 | ||
459 | memDCTemp.Blit(0, 0, fullRect.GetWidth(), fullRect.GetHeight(), & memDC, fullRect.x - m_boundingRect.x, fullRect.y - m_boundingRect.y); | |
460 | ||
461 | // If drawing, draw the image onto the mem DC | |
462 | if (drawNew) | |
463 | { | |
f6bcfd97 BP |
464 | wxPoint pos(newPos.x - fullRect.x, newPos.y - fullRect.y) ; |
465 | DoDrawImage(memDCTemp, pos); | |
68be9f09 JS |
466 | } |
467 | ||
468 | // Now blit to the window | |
469 | // Finally, blit the temp mem DC to the window. | |
470 | m_windowDC->Blit(fullRect.x, fullRect.y, fullRect.width, fullRect.height, & memDCTemp, 0, 0); | |
471 | ||
472 | memDCTemp.SelectObject(wxNullBitmap); | |
473 | memDC.SelectObject(wxNullBitmap); | |
474 | ||
475 | return TRUE; | |
476 | } | |
477 | ||
f6bcfd97 BP |
478 | // Override this if you are using a virtual image (drawing your own image) |
479 | bool wxGenericDragImage::DoDrawImage(wxDC& dc, const wxPoint& pos) const | |
480 | { | |
481 | if (m_bitmap.Ok()) | |
482 | { | |
483 | dc.DrawBitmap(m_bitmap, pos.x, pos.y, (m_bitmap.GetMask() != 0)); | |
484 | return TRUE; | |
485 | } | |
486 | else if (m_icon.Ok()) | |
487 | { | |
488 | dc.DrawIcon(m_icon, pos.x, pos.y); | |
489 | return TRUE; | |
490 | } | |
491 | else | |
492 | return FALSE; | |
493 | } | |
494 | ||
495 | // Override this if you are using a virtual image (drawing your own image) | |
68be9f09 JS |
496 | wxRect wxGenericDragImage::GetImageRect(const wxPoint& pos) const |
497 | { | |
498 | if (m_bitmap.Ok()) | |
499 | { | |
500 | return wxRect(pos.x, pos.y, m_bitmap.GetWidth(), m_bitmap.GetHeight()); | |
501 | } | |
502 | else if (m_icon.Ok()) | |
503 | { | |
504 | return wxRect(pos.x, pos.y, m_icon.GetWidth(), m_icon.GetHeight()); | |
505 | } | |
506 | else | |
507 | { | |
508 | return wxRect(pos.x, pos.y, 0, 0); | |
509 | } | |
510 | } | |
511 | ||
1e6feb95 | 512 | #endif // wxUSE_DRAGIMAGE |