| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: dragimag.cpp |
| 3 | // Purpose: wxDragImage |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 08/04/99 |
| 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 "dragimag.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 | #if wxUSE_DRAGIMAGE |
| 32 | |
| 33 | #if defined(__WIN95__) |
| 34 | |
| 35 | #ifndef WX_PRECOMP |
| 36 | #include <stdio.h> |
| 37 | #include "wx/setup.h" |
| 38 | #include "wx/window.h" |
| 39 | #include "wx/dcclient.h" |
| 40 | #include "wx/dcscreen.h" |
| 41 | #include "wx/dcmemory.h" |
| 42 | #include "wx/settings.h" |
| 43 | #endif |
| 44 | |
| 45 | #include "wx/msw/private.h" |
| 46 | #include "wx/log.h" |
| 47 | #include "wx/intl.h" |
| 48 | #include "wx/frame.h" |
| 49 | #include "wx/image.h" |
| 50 | |
| 51 | #include "wx/msw/dragimag.h" |
| 52 | #include "wx/msw/private.h" |
| 53 | |
| 54 | #if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__)) |
| 55 | #include <commctrl.h> |
| 56 | #endif |
| 57 | |
| 58 | // Wine doesn't have this yet |
| 59 | #ifndef ListView_CreateDragImage |
| 60 | #define ListView_CreateDragImage(hwnd, i, lpptUpLeft) \ |
| 61 | (HIMAGELIST)SNDMSG((hwnd), LVM_CREATEDRAGIMAGE, (WPARAM)(int)(i), (LPARAM)(LPPOINT)(lpptUpLeft)) |
| 62 | #endif |
| 63 | |
| 64 | // ---------------------------------------------------------------------------- |
| 65 | // macros |
| 66 | // ---------------------------------------------------------------------------- |
| 67 | |
| 68 | IMPLEMENT_DYNAMIC_CLASS(wxDragImage, wxObject) |
| 69 | |
| 70 | #define GetHimageList() ((HIMAGELIST) m_hImageList) |
| 71 | |
| 72 | // ============================================================================ |
| 73 | // implementation |
| 74 | // ============================================================================ |
| 75 | |
| 76 | // ---------------------------------------------------------------------------- |
| 77 | // wxDragImage ctors/dtor |
| 78 | // ---------------------------------------------------------------------------- |
| 79 | |
| 80 | wxDragImage::wxDragImage() |
| 81 | { |
| 82 | Init(); |
| 83 | } |
| 84 | |
| 85 | wxDragImage::~wxDragImage() |
| 86 | { |
| 87 | if ( m_hImageList ) |
| 88 | ImageList_Destroy(GetHimageList()); |
| 89 | #if !wxUSE_SIMPLER_DRAGIMAGE |
| 90 | if ( m_hCursorImageList ) |
| 91 | ImageList_Destroy((HIMAGELIST) m_hCursorImageList); |
| 92 | #endif |
| 93 | } |
| 94 | |
| 95 | void wxDragImage::Init() |
| 96 | { |
| 97 | m_hImageList = 0; |
| 98 | #if !wxUSE_SIMPLER_DRAGIMAGE |
| 99 | m_hCursorImageList = 0; |
| 100 | #endif |
| 101 | m_window = (wxWindow*) NULL; |
| 102 | m_fullScreen = FALSE; |
| 103 | } |
| 104 | |
| 105 | // Attributes |
| 106 | //////////////////////////////////////////////////////////////////////////// |
| 107 | |
| 108 | |
| 109 | // Operations |
| 110 | //////////////////////////////////////////////////////////////////////////// |
| 111 | |
| 112 | // Create a drag image from a bitmap and optional cursor |
| 113 | bool wxDragImage::Create(const wxBitmap& image, const wxCursor& cursor) |
| 114 | { |
| 115 | if ( m_hImageList ) |
| 116 | ImageList_Destroy(GetHimageList()); |
| 117 | m_hImageList = 0; |
| 118 | |
| 119 | UINT flags = 0 ; |
| 120 | if (image.GetDepth() <= 4) |
| 121 | flags = ILC_COLOR4; |
| 122 | else if (image.GetDepth() <= 8) |
| 123 | flags = ILC_COLOR8; |
| 124 | else if (image.GetDepth() <= 16) |
| 125 | flags = ILC_COLOR16; |
| 126 | else if (image.GetDepth() <= 24) |
| 127 | flags = ILC_COLOR24; |
| 128 | else |
| 129 | flags = ILC_COLOR32; |
| 130 | |
| 131 | bool mask = (image.GetMask() != 0); |
| 132 | |
| 133 | // Curiously, even if the image doesn't have a mask, |
| 134 | // we still have to use ILC_MASK or the image won't show |
| 135 | // up when dragged. |
| 136 | // if ( mask ) |
| 137 | flags |= ILC_MASK; |
| 138 | |
| 139 | m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1); |
| 140 | |
| 141 | int index; |
| 142 | if (!mask) |
| 143 | { |
| 144 | HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP(); |
| 145 | index = ImageList_Add(GetHimageList(), hBitmap1, 0); |
| 146 | } |
| 147 | else |
| 148 | { |
| 149 | HBITMAP hBitmap1 = (HBITMAP) image.GetHBITMAP(); |
| 150 | HBITMAP hBitmap2 = (HBITMAP) image.GetMask()->GetMaskBitmap(); |
| 151 | HBITMAP hbmpMask = wxInvertMask(hBitmap2); |
| 152 | |
| 153 | index = ImageList_Add(GetHimageList(), hBitmap1, hbmpMask); |
| 154 | ::DeleteObject(hbmpMask); |
| 155 | } |
| 156 | if ( index == -1 ) |
| 157 | { |
| 158 | wxLogError(_("Couldn't add an image to the image list.")); |
| 159 | } |
| 160 | m_cursor = cursor; // Can only combine with drag image after calling BeginDrag. |
| 161 | |
| 162 | return (index != -1) ; |
| 163 | } |
| 164 | |
| 165 | // Create a drag image from an icon and optional cursor |
| 166 | bool wxDragImage::Create(const wxIcon& image, const wxCursor& cursor) |
| 167 | { |
| 168 | if ( m_hImageList ) |
| 169 | ImageList_Destroy(GetHimageList()); |
| 170 | m_hImageList = 0; |
| 171 | |
| 172 | UINT flags = 0 ; |
| 173 | if (image.GetDepth() <= 4) |
| 174 | flags = ILC_COLOR4; |
| 175 | else if (image.GetDepth() <= 8) |
| 176 | flags = ILC_COLOR8; |
| 177 | else if (image.GetDepth() <= 16) |
| 178 | flags = ILC_COLOR16; |
| 179 | else if (image.GetDepth() <= 24) |
| 180 | flags = ILC_COLOR24; |
| 181 | else |
| 182 | flags = ILC_COLOR32; |
| 183 | bool mask = TRUE; |
| 184 | if ( mask ) |
| 185 | flags |= ILC_MASK; |
| 186 | |
| 187 | m_hImageList = (WXHIMAGELIST) ImageList_Create(image.GetWidth(), image.GetHeight(), flags, 1, 1); |
| 188 | |
| 189 | HICON hIcon = (HICON) image.GetHICON(); |
| 190 | |
| 191 | int index = ImageList_AddIcon(GetHimageList(), hIcon); |
| 192 | if ( index == -1 ) |
| 193 | { |
| 194 | wxLogError(_("Couldn't add an image to the image list.")); |
| 195 | } |
| 196 | |
| 197 | m_cursor = cursor; // Can only combine with drag image after calling BeginDrag. |
| 198 | |
| 199 | return (index != -1) ; |
| 200 | } |
| 201 | |
| 202 | // Create a drag image from a string and optional cursor |
| 203 | bool wxDragImage::Create(const wxString& str, const wxCursor& cursor) |
| 204 | { |
| 205 | wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)); |
| 206 | |
| 207 | long w, h; |
| 208 | wxScreenDC dc; |
| 209 | dc.SetFont(font); |
| 210 | dc.GetTextExtent(str, & w, & h); |
| 211 | dc.SetFont(wxNullFont); |
| 212 | |
| 213 | wxMemoryDC dc2; |
| 214 | dc2.SetFont(font); |
| 215 | wxBitmap bitmap((int) w+2, (int) h+2); |
| 216 | dc2.SelectObject(bitmap); |
| 217 | |
| 218 | dc2.SetBackground(* wxWHITE_BRUSH); |
| 219 | dc2.Clear(); |
| 220 | dc2.SetBackgroundMode(wxTRANSPARENT); |
| 221 | dc2.SetTextForeground(* wxLIGHT_GREY); |
| 222 | dc2.DrawText(str, 0, 0); |
| 223 | dc2.DrawText(str, 1, 0); |
| 224 | dc2.DrawText(str, 2, 0); |
| 225 | dc2.DrawText(str, 1, 1); |
| 226 | dc2.DrawText(str, 2, 1); |
| 227 | dc2.DrawText(str, 1, 2); |
| 228 | dc2.DrawText(str, 2, 2); |
| 229 | dc2.SetTextForeground(* wxBLACK); |
| 230 | dc2.DrawText(str, 1, 1); |
| 231 | |
| 232 | dc2.SelectObject(wxNullBitmap); |
| 233 | |
| 234 | // Make the bitmap masked |
| 235 | wxImage image = bitmap.ConvertToImage(); |
| 236 | image.SetMaskColour(255, 255, 255); |
| 237 | return Create(wxBitmap(image), cursor); |
| 238 | } |
| 239 | |
| 240 | // Create a drag image for the given tree control item |
| 241 | bool wxDragImage::Create(const wxTreeCtrl& treeCtrl, wxTreeItemId& id) |
| 242 | { |
| 243 | if ( m_hImageList ) |
| 244 | ImageList_Destroy(GetHimageList()); |
| 245 | m_hImageList = (WXHIMAGELIST) TreeView_CreateDragImage((HWND) treeCtrl.GetHWND(), (HTREEITEM) (WXHTREEITEM) id); |
| 246 | return TRUE; |
| 247 | } |
| 248 | |
| 249 | // Create a drag image for the given list control item |
| 250 | bool wxDragImage::Create(const wxListCtrl& listCtrl, long id) |
| 251 | { |
| 252 | if ( m_hImageList ) |
| 253 | ImageList_Destroy(GetHimageList()); |
| 254 | POINT pt; |
| 255 | pt.x = 0; pt.y = 0; |
| 256 | m_hImageList = (WXHIMAGELIST) ListView_CreateDragImage((HWND) listCtrl.GetHWND(), id, & pt); |
| 257 | return TRUE; |
| 258 | } |
| 259 | |
| 260 | // Begin drag |
| 261 | bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, bool fullScreen, wxRect* rect) |
| 262 | { |
| 263 | wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in BeginDrag.")); |
| 264 | wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag.")); |
| 265 | |
| 266 | m_fullScreen = fullScreen; |
| 267 | if (rect) |
| 268 | m_boundingRect = * rect; |
| 269 | |
| 270 | bool ret = (ImageList_BeginDrag(GetHimageList(), 0, hotspot.x, hotspot.y) != 0); |
| 271 | |
| 272 | if (!ret) |
| 273 | { |
| 274 | wxFAIL_MSG( _T("BeginDrag failed.") ); |
| 275 | |
| 276 | return FALSE; |
| 277 | } |
| 278 | |
| 279 | if (m_cursor.Ok()) |
| 280 | { |
| 281 | #if wxUSE_SIMPLER_DRAGIMAGE |
| 282 | m_oldCursor = window->GetCursor(); |
| 283 | window->SetCursor(m_cursor); |
| 284 | #else |
| 285 | if (!m_hCursorImageList) |
| 286 | { |
| 287 | int cxCursor = GetSystemMetrics(SM_CXCURSOR); |
| 288 | int cyCursor = GetSystemMetrics(SM_CYCURSOR); |
| 289 | |
| 290 | m_hCursorImageList = (WXHIMAGELIST) ImageList_Create(cxCursor, cyCursor, ILC_MASK, 1, 1); |
| 291 | } |
| 292 | |
| 293 | // See if we can find the cursor hotspot |
| 294 | wxPoint curHotSpot(hotspot); |
| 295 | |
| 296 | // Although it seems to produce the right position, when the hotspot goeos |
| 297 | // negative it has strange effects on the image. |
| 298 | // How do we stop the cursor jumping right and below of where it should be? |
| 299 | #if 0 |
| 300 | ICONINFO iconInfo; |
| 301 | if (::GetIconInfo((HICON) (HCURSOR) m_cursor.GetHCURSOR(), & iconInfo) != 0) |
| 302 | { |
| 303 | curHotSpot.x -= iconInfo.xHotspot; |
| 304 | curHotSpot.y -= iconInfo.yHotspot; |
| 305 | } |
| 306 | #endif |
| 307 | //wxString msg; |
| 308 | //msg.Printf("Hotspot = %d, %d", curHotSpot.x, curHotSpot.y); |
| 309 | //wxLogDebug(msg); |
| 310 | |
| 311 | // First add the cursor to the image list |
| 312 | HCURSOR hCursor = (HCURSOR) m_cursor.GetHCURSOR(); |
| 313 | int cursorIndex = ImageList_AddIcon((HIMAGELIST) m_hCursorImageList, (HICON) hCursor); |
| 314 | |
| 315 | wxASSERT_MSG( (cursorIndex != -1), wxT("ImageList_AddIcon failed in BeginDrag.")); |
| 316 | |
| 317 | if (cursorIndex != -1) |
| 318 | { |
| 319 | ImageList_SetDragCursorImage((HIMAGELIST) m_hCursorImageList, cursorIndex, curHotSpot.x, curHotSpot.y); |
| 320 | } |
| 321 | #endif |
| 322 | } |
| 323 | |
| 324 | #if !wxUSE_SIMPLER_DRAGIMAGE |
| 325 | if (m_cursor.Ok()) |
| 326 | ::ShowCursor(FALSE); |
| 327 | #endif |
| 328 | |
| 329 | m_window = window; |
| 330 | |
| 331 | ::SetCapture(GetHwndOf(window)); |
| 332 | |
| 333 | return TRUE; |
| 334 | } |
| 335 | |
| 336 | // Begin drag. hotspot is the location of the drag position relative to the upper-left |
| 337 | // corner of the image. This is full screen only. fullScreenRect gives the |
| 338 | // position of the window on the screen, to restrict the drag to. |
| 339 | bool wxDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxWindow* fullScreenRect) |
| 340 | { |
| 341 | wxRect rect; |
| 342 | |
| 343 | int x = fullScreenRect->GetPosition().x; |
| 344 | int y = fullScreenRect->GetPosition().y; |
| 345 | |
| 346 | wxSize sz = fullScreenRect->GetSize(); |
| 347 | |
| 348 | if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame))) |
| 349 | fullScreenRect->GetParent()->ClientToScreen(& x, & y); |
| 350 | |
| 351 | rect.x = x; rect.y = y; |
| 352 | rect.width = sz.x; rect.height = sz.y; |
| 353 | |
| 354 | return BeginDrag(hotspot, window, TRUE, & rect); |
| 355 | } |
| 356 | |
| 357 | // End drag |
| 358 | bool wxDragImage::EndDrag() |
| 359 | { |
| 360 | wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in EndDrag.")); |
| 361 | |
| 362 | ImageList_EndDrag(); |
| 363 | |
| 364 | if ( !::ReleaseCapture() ) |
| 365 | { |
| 366 | wxLogLastError(wxT("ReleaseCapture")); |
| 367 | } |
| 368 | |
| 369 | #if wxUSE_SIMPLER_DRAGIMAGE |
| 370 | if (m_cursor.Ok() && m_oldCursor.Ok()) |
| 371 | m_window->SetCursor(m_oldCursor); |
| 372 | #else |
| 373 | ::ShowCursor(TRUE); |
| 374 | #endif |
| 375 | |
| 376 | m_window = (wxWindow*) NULL; |
| 377 | |
| 378 | return TRUE; |
| 379 | } |
| 380 | |
| 381 | // Move the image: call from OnMouseMove. Pt is in window client coordinates if window |
| 382 | // is non-NULL, or in screen coordinates if NULL. |
| 383 | bool wxDragImage::Move(const wxPoint& pt) |
| 384 | { |
| 385 | wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Move.")); |
| 386 | |
| 387 | // These are in window, not client coordinates. |
| 388 | // So need to convert to client coordinates. |
| 389 | wxPoint pt2(pt); |
| 390 | if (m_window && !m_fullScreen) |
| 391 | { |
| 392 | RECT rect; |
| 393 | rect.left = 0; rect.top = 0; |
| 394 | rect.right = 0; rect.bottom = 0; |
| 395 | DWORD style = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_STYLE); |
| 396 | #ifdef __WIN32__ |
| 397 | DWORD exStyle = ::GetWindowLong((HWND) m_window->GetHWND(), GWL_EXSTYLE); |
| 398 | ::AdjustWindowRectEx(& rect, style, FALSE, exStyle); |
| 399 | #else |
| 400 | ::AdjustWindowRect(& rect, style, FALSE); |
| 401 | #endif |
| 402 | // Subtract the (negative) values, i.e. add a small increment |
| 403 | pt2.x -= rect.left; pt2.y -= rect.top; |
| 404 | } |
| 405 | else if (m_window && m_fullScreen) |
| 406 | { |
| 407 | pt2 = m_window->ClientToScreen(pt2); |
| 408 | } |
| 409 | |
| 410 | bool ret = (ImageList_DragMove( pt2.x, pt2.y ) != 0); |
| 411 | |
| 412 | m_position = pt2; |
| 413 | |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | bool wxDragImage::Show() |
| 418 | { |
| 419 | wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Show.")); |
| 420 | |
| 421 | HWND hWnd = 0; |
| 422 | if (m_window && !m_fullScreen) |
| 423 | hWnd = (HWND) m_window->GetHWND(); |
| 424 | |
| 425 | bool ret = (ImageList_DragEnter( hWnd, m_position.x, m_position.y ) != 0); |
| 426 | |
| 427 | return ret; |
| 428 | } |
| 429 | |
| 430 | bool wxDragImage::Hide() |
| 431 | { |
| 432 | wxASSERT_MSG( (m_hImageList != 0), wxT("Image list must not be null in Hide.")); |
| 433 | |
| 434 | HWND hWnd = 0; |
| 435 | if (m_window && !m_fullScreen) |
| 436 | hWnd = (HWND) m_window->GetHWND(); |
| 437 | |
| 438 | bool ret = (ImageList_DragLeave( hWnd ) != 0); |
| 439 | |
| 440 | return ret; |
| 441 | } |
| 442 | |
| 443 | #endif |
| 444 | // __WIN95__ |
| 445 | |
| 446 | #endif // wxUSE_DRAGIMAGE |