| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: msw/utilsgui.cpp |
| 3 | // Purpose: Various utility functions only available in GUI |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Modified by: |
| 6 | // Created: 21.06.2003 (extracted from msw/utils.cpp) |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // License: wxWindows licence |
| 10 | /////////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // for compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #ifndef WX_PRECOMP |
| 28 | #include "wx/cursor.h" |
| 29 | #include "wx/window.h" |
| 30 | #include "wx/utils.h" |
| 31 | #endif //WX_PRECOMP |
| 32 | |
| 33 | #include "wx/dynlib.h" |
| 34 | |
| 35 | #include "wx/msw/private.h" // includes <windows.h> |
| 36 | |
| 37 | // ============================================================================ |
| 38 | // implementation |
| 39 | // ============================================================================ |
| 40 | |
| 41 | // --------------------------------------------------------------------------- |
| 42 | // helper functions for showing a "busy" cursor |
| 43 | // --------------------------------------------------------------------------- |
| 44 | |
| 45 | static HCURSOR gs_wxBusyCursor = 0; // new, busy cursor |
| 46 | static HCURSOR gs_wxBusyCursorOld = 0; // old cursor |
| 47 | static int gs_wxBusyCursorCount = 0; |
| 48 | |
| 49 | extern HCURSOR wxGetCurrentBusyCursor() |
| 50 | { |
| 51 | return gs_wxBusyCursor; |
| 52 | } |
| 53 | |
| 54 | // Set the cursor to the busy cursor for all windows |
| 55 | void wxBeginBusyCursor(const wxCursor *cursor) |
| 56 | { |
| 57 | if ( gs_wxBusyCursorCount++ == 0 ) |
| 58 | { |
| 59 | gs_wxBusyCursor = (HCURSOR)cursor->GetHCURSOR(); |
| 60 | #ifndef __WXMICROWIN__ |
| 61 | gs_wxBusyCursorOld = ::SetCursor(gs_wxBusyCursor); |
| 62 | #endif |
| 63 | } |
| 64 | //else: nothing to do, already set |
| 65 | } |
| 66 | |
| 67 | // Restore cursor to normal |
| 68 | void wxEndBusyCursor() |
| 69 | { |
| 70 | wxCHECK_RET( gs_wxBusyCursorCount > 0, |
| 71 | wxT("no matching wxBeginBusyCursor() for wxEndBusyCursor()") ); |
| 72 | |
| 73 | if ( --gs_wxBusyCursorCount == 0 ) |
| 74 | { |
| 75 | #ifndef __WXMICROWIN__ |
| 76 | ::SetCursor(gs_wxBusyCursorOld); |
| 77 | #endif |
| 78 | gs_wxBusyCursorOld = 0; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | // true if we're between the above two calls |
| 83 | bool wxIsBusy() |
| 84 | { |
| 85 | return gs_wxBusyCursorCount > 0; |
| 86 | } |
| 87 | |
| 88 | // Check whether this window wants to process messages, e.g. Stop button |
| 89 | // in long calculations. |
| 90 | bool wxCheckForInterrupt(wxWindow *wnd) |
| 91 | { |
| 92 | wxCHECK( wnd, false ); |
| 93 | |
| 94 | MSG msg; |
| 95 | while ( ::PeekMessage(&msg, GetHwndOf(wnd), 0, 0, PM_REMOVE) ) |
| 96 | { |
| 97 | ::TranslateMessage(&msg); |
| 98 | ::DispatchMessage(&msg); |
| 99 | } |
| 100 | |
| 101 | return true; |
| 102 | } |
| 103 | |
| 104 | // MSW only: get user-defined resource from the .res file. |
| 105 | // Returns NULL or newly-allocated memory, so use delete[] to clean up. |
| 106 | |
| 107 | #ifndef __WXMICROWIN__ |
| 108 | wxChar *wxLoadUserResource(const wxString& resourceName, const wxString& resourceType) |
| 109 | { |
| 110 | HRSRC hResource = ::FindResource(wxGetInstance(), |
| 111 | resourceName.wx_str(), |
| 112 | resourceType.wx_str()); |
| 113 | if ( hResource == 0 ) |
| 114 | return NULL; |
| 115 | |
| 116 | HGLOBAL hData = ::LoadResource(wxGetInstance(), hResource); |
| 117 | if ( hData == 0 ) |
| 118 | return NULL; |
| 119 | |
| 120 | wxChar *theText = (wxChar *)::LockResource(hData); |
| 121 | if ( !theText ) |
| 122 | return NULL; |
| 123 | |
| 124 | // Not all compilers put a zero at the end of the resource (e.g. BC++ doesn't). |
| 125 | // so we need to find the length of the resource. |
| 126 | int len = ::SizeofResource(wxGetInstance(), hResource); |
| 127 | wxChar *s = new wxChar[len+1]; |
| 128 | wxStrncpy(s,theText,len); |
| 129 | s[len]=0; |
| 130 | |
| 131 | // Obsolete in WIN32 |
| 132 | #ifndef __WIN32__ |
| 133 | UnlockResource(hData); |
| 134 | #endif |
| 135 | |
| 136 | // No need?? |
| 137 | // GlobalFree(hData); |
| 138 | |
| 139 | return s; |
| 140 | } |
| 141 | #endif // __WXMICROWIN__ |
| 142 | |
| 143 | // ---------------------------------------------------------------------------- |
| 144 | // get display info |
| 145 | // ---------------------------------------------------------------------------- |
| 146 | |
| 147 | // See also the wxGetMousePosition in window.cpp |
| 148 | // Deprecated: use wxPoint wxGetMousePosition() instead |
| 149 | void wxGetMousePosition( int* x, int* y ) |
| 150 | { |
| 151 | POINT pt; |
| 152 | GetCursorPos( & pt ); |
| 153 | if ( x ) *x = pt.x; |
| 154 | if ( y ) *y = pt.y; |
| 155 | } |
| 156 | |
| 157 | // Return true if we have a colour display |
| 158 | bool wxColourDisplay() |
| 159 | { |
| 160 | #ifdef __WXMICROWIN__ |
| 161 | // MICROWIN_TODO |
| 162 | return true; |
| 163 | #else |
| 164 | // this function is called from wxDC ctor so it is called a *lot* of times |
| 165 | // hence we optimize it a bit but doing the check only once |
| 166 | // |
| 167 | // this should be MT safe as only the GUI thread (holding the GUI mutex) |
| 168 | // can call us |
| 169 | static int s_isColour = -1; |
| 170 | |
| 171 | if ( s_isColour == -1 ) |
| 172 | { |
| 173 | ScreenHDC dc; |
| 174 | int noCols = ::GetDeviceCaps(dc, NUMCOLORS); |
| 175 | |
| 176 | s_isColour = (noCols == -1) || (noCols > 2); |
| 177 | } |
| 178 | |
| 179 | return s_isColour != 0; |
| 180 | #endif |
| 181 | } |
| 182 | |
| 183 | // Returns depth of screen |
| 184 | int wxDisplayDepth() |
| 185 | { |
| 186 | ScreenHDC dc; |
| 187 | return GetDeviceCaps(dc, PLANES) * GetDeviceCaps(dc, BITSPIXEL); |
| 188 | } |
| 189 | |
| 190 | // Get size of display |
| 191 | void wxDisplaySize(int *width, int *height) |
| 192 | { |
| 193 | #ifdef __WXMICROWIN__ |
| 194 | RECT rect; |
| 195 | HWND hWnd = GetDesktopWindow(); |
| 196 | ::GetWindowRect(hWnd, & rect); |
| 197 | |
| 198 | if ( width ) |
| 199 | *width = rect.right - rect.left; |
| 200 | if ( height ) |
| 201 | *height = rect.bottom - rect.top; |
| 202 | #else // !__WXMICROWIN__ |
| 203 | ScreenHDC dc; |
| 204 | |
| 205 | if ( width ) |
| 206 | *width = ::GetDeviceCaps(dc, HORZRES); |
| 207 | if ( height ) |
| 208 | *height = ::GetDeviceCaps(dc, VERTRES); |
| 209 | #endif // __WXMICROWIN__/!__WXMICROWIN__ |
| 210 | } |
| 211 | |
| 212 | void wxDisplaySizeMM(int *width, int *height) |
| 213 | { |
| 214 | #ifdef __WXMICROWIN__ |
| 215 | // MICROWIN_TODO |
| 216 | if ( width ) |
| 217 | *width = 0; |
| 218 | if ( height ) |
| 219 | *height = 0; |
| 220 | #else |
| 221 | ScreenHDC dc; |
| 222 | |
| 223 | if ( width ) |
| 224 | *width = ::GetDeviceCaps(dc, HORZSIZE); |
| 225 | if ( height ) |
| 226 | *height = ::GetDeviceCaps(dc, VERTSIZE); |
| 227 | #endif |
| 228 | } |
| 229 | |
| 230 | void wxClientDisplayRect(int *x, int *y, int *width, int *height) |
| 231 | { |
| 232 | #if defined(__WXMICROWIN__) |
| 233 | *x = 0; *y = 0; |
| 234 | wxDisplaySize(width, height); |
| 235 | #else |
| 236 | // Determine the desktop dimensions minus the taskbar and any other |
| 237 | // special decorations... |
| 238 | RECT r; |
| 239 | |
| 240 | SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0); |
| 241 | if (x) *x = r.left; |
| 242 | if (y) *y = r.top; |
| 243 | if (width) *width = r.right - r.left; |
| 244 | if (height) *height = r.bottom - r.top; |
| 245 | #endif |
| 246 | } |
| 247 | |
| 248 | // --------------------------------------------------------------------------- |
| 249 | // window information functions |
| 250 | // --------------------------------------------------------------------------- |
| 251 | |
| 252 | wxString WXDLLEXPORT wxGetWindowText(WXHWND hWnd) |
| 253 | { |
| 254 | wxString str; |
| 255 | |
| 256 | if ( hWnd ) |
| 257 | { |
| 258 | int len = GetWindowTextLength((HWND)hWnd) + 1; |
| 259 | ::GetWindowText((HWND)hWnd, wxStringBuffer(str, len), len); |
| 260 | } |
| 261 | |
| 262 | return str; |
| 263 | } |
| 264 | |
| 265 | wxString WXDLLEXPORT wxGetWindowClass(WXHWND hWnd) |
| 266 | { |
| 267 | wxString str; |
| 268 | |
| 269 | // MICROWIN_TODO |
| 270 | #ifndef __WXMICROWIN__ |
| 271 | if ( hWnd ) |
| 272 | { |
| 273 | int len = 256; // some starting value |
| 274 | |
| 275 | for ( ;; ) |
| 276 | { |
| 277 | int count = ::GetClassName((HWND)hWnd, wxStringBuffer(str, len), len); |
| 278 | |
| 279 | if ( count == len ) |
| 280 | { |
| 281 | // the class name might have been truncated, retry with larger |
| 282 | // buffer |
| 283 | len *= 2; |
| 284 | } |
| 285 | else |
| 286 | { |
| 287 | break; |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | #endif // !__WXMICROWIN__ |
| 292 | |
| 293 | return str; |
| 294 | } |
| 295 | |
| 296 | WXWORD WXDLLEXPORT wxGetWindowId(WXHWND hWnd) |
| 297 | { |
| 298 | return (WXWORD)GetWindowLong((HWND)hWnd, GWL_ID); |
| 299 | } |
| 300 | |
| 301 | // ---------------------------------------------------------------------------- |
| 302 | // Metafile helpers |
| 303 | // ---------------------------------------------------------------------------- |
| 304 | |
| 305 | extern void PixelToHIMETRIC(LONG *x, LONG *y) |
| 306 | { |
| 307 | ScreenHDC hdcRef; |
| 308 | |
| 309 | int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), |
| 310 | iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), |
| 311 | iWidthPels = GetDeviceCaps(hdcRef, HORZRES), |
| 312 | iHeightPels = GetDeviceCaps(hdcRef, VERTRES); |
| 313 | |
| 314 | *x *= (iWidthMM * 100); |
| 315 | *x /= iWidthPels; |
| 316 | *y *= (iHeightMM * 100); |
| 317 | *y /= iHeightPels; |
| 318 | } |
| 319 | |
| 320 | extern void HIMETRICToPixel(LONG *x, LONG *y) |
| 321 | { |
| 322 | ScreenHDC hdcRef; |
| 323 | |
| 324 | int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), |
| 325 | iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), |
| 326 | iWidthPels = GetDeviceCaps(hdcRef, HORZRES), |
| 327 | iHeightPels = GetDeviceCaps(hdcRef, VERTRES); |
| 328 | |
| 329 | *x *= iWidthPels; |
| 330 | *x /= (iWidthMM * 100); |
| 331 | *y *= iHeightPels; |
| 332 | *y /= (iHeightMM * 100); |
| 333 | } |
| 334 | |
| 335 | void wxDrawLine(HDC hdc, int x1, int y1, int x2, int y2) |
| 336 | { |
| 337 | #ifdef __WXWINCE__ |
| 338 | POINT points[2]; |
| 339 | points[0].x = x1; |
| 340 | points[0].y = y1; |
| 341 | points[1].x = x2; |
| 342 | points[1].y = y2; |
| 343 | Polyline(hdc, points, 2); |
| 344 | #else |
| 345 | MoveToEx(hdc, x1, y1, NULL); LineTo((HDC) hdc, x2, y2); |
| 346 | #endif |
| 347 | } |
| 348 | |
| 349 | |
| 350 | // ---------------------------------------------------------------------------- |
| 351 | // Shell API wrappers |
| 352 | // ---------------------------------------------------------------------------- |
| 353 | |
| 354 | extern bool wxEnableFileNameAutoComplete(HWND hwnd) |
| 355 | { |
| 356 | #if wxUSE_DYNLIB_CLASS |
| 357 | typedef HRESULT (WINAPI *SHAutoComplete_t)(HWND, DWORD); |
| 358 | |
| 359 | static SHAutoComplete_t s_pfnSHAutoComplete = NULL; |
| 360 | static bool s_initialized = false; |
| 361 | |
| 362 | if ( !s_initialized ) |
| 363 | { |
| 364 | s_initialized = true; |
| 365 | |
| 366 | wxLogNull nolog; |
| 367 | wxDynamicLibrary dll(_T("shlwapi.dll")); |
| 368 | if ( dll.IsLoaded() ) |
| 369 | { |
| 370 | s_pfnSHAutoComplete = |
| 371 | (SHAutoComplete_t)dll.GetSymbol(_T("SHAutoComplete")); |
| 372 | if ( s_pfnSHAutoComplete ) |
| 373 | { |
| 374 | // won't be unloaded until the process termination, no big deal |
| 375 | dll.Detach(); |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | if ( !s_pfnSHAutoComplete ) |
| 381 | return false; |
| 382 | |
| 383 | HRESULT hr = s_pfnSHAutoComplete(hwnd, 0x10 /* SHACF_FILESYS_ONLY */); |
| 384 | if ( FAILED(hr) ) |
| 385 | { |
| 386 | wxLogApiError(_T("SHAutoComplete"), hr); |
| 387 | return false; |
| 388 | } |
| 389 | |
| 390 | return true; |
| 391 | #else |
| 392 | wxUnusedVar(hwnd); |
| 393 | return false; |
| 394 | #endif // wxUSE_DYNLIB_CLASS/!wxUSE_DYNLIB_CLASS |
| 395 | } |
| 396 | |