| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: msw/button.cpp |
| 3 | // Purpose: wxButton |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 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 "button.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_BUTTON |
| 32 | |
| 33 | #ifndef WX_PRECOMP |
| 34 | #include "wx/button.h" |
| 35 | #include "wx/brush.h" |
| 36 | #include "wx/panel.h" |
| 37 | #include "wx/bmpbuttn.h" |
| 38 | #include "wx/settings.h" |
| 39 | #include "wx/dcscreen.h" |
| 40 | #endif |
| 41 | |
| 42 | #include "wx/msw/private.h" |
| 43 | |
| 44 | // ---------------------------------------------------------------------------- |
| 45 | // macros |
| 46 | // ---------------------------------------------------------------------------- |
| 47 | |
| 48 | IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl) |
| 49 | |
| 50 | // this macro tries to adjust the default button height to a reasonable value |
| 51 | // using the char height as the base |
| 52 | #define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10) |
| 53 | |
| 54 | // ============================================================================ |
| 55 | // implementation |
| 56 | // ============================================================================ |
| 57 | |
| 58 | // ---------------------------------------------------------------------------- |
| 59 | // creation/destruction |
| 60 | // ---------------------------------------------------------------------------- |
| 61 | |
| 62 | bool wxButton::Create(wxWindow *parent, |
| 63 | wxWindowID id, |
| 64 | const wxString& label, |
| 65 | const wxPoint& pos, |
| 66 | const wxSize& size, |
| 67 | long style, |
| 68 | const wxValidator& validator, |
| 69 | const wxString& name) |
| 70 | { |
| 71 | if ( !CreateBase(parent, id, pos, size, style, validator, name) ) |
| 72 | return FALSE; |
| 73 | |
| 74 | parent->AddChild((wxButton *)this); |
| 75 | |
| 76 | m_backgroundColour = parent->GetBackgroundColour(); |
| 77 | m_foregroundColour = parent->GetForegroundColour(); |
| 78 | |
| 79 | long msStyle = WS_VISIBLE | WS_TABSTOP | WS_CHILD /* | WS_CLIPSIBLINGS */ ; |
| 80 | |
| 81 | if ( m_windowStyle & wxCLIP_SIBLINGS ) |
| 82 | msStyle |= WS_CLIPSIBLINGS; |
| 83 | |
| 84 | #ifdef __WIN32__ |
| 85 | if(m_windowStyle & wxBU_LEFT) |
| 86 | msStyle |= BS_LEFT; |
| 87 | if(m_windowStyle & wxBU_RIGHT) |
| 88 | msStyle |= BS_RIGHT; |
| 89 | if(m_windowStyle & wxBU_TOP) |
| 90 | msStyle |= BS_TOP; |
| 91 | if(m_windowStyle & wxBU_BOTTOM) |
| 92 | msStyle |= BS_BOTTOM; |
| 93 | #endif |
| 94 | |
| 95 | m_hWnd = (WXHWND)CreateWindowEx |
| 96 | ( |
| 97 | MakeExtendedStyle(m_windowStyle), |
| 98 | wxT("BUTTON"), |
| 99 | label, |
| 100 | msStyle, |
| 101 | 0, 0, 0, 0, |
| 102 | GetWinHwnd(parent), |
| 103 | (HMENU)m_windowId, |
| 104 | wxGetInstance(), |
| 105 | NULL |
| 106 | ); |
| 107 | |
| 108 | if (m_hWnd == 0) |
| 109 | { |
| 110 | wxString msg; |
| 111 | #ifdef __WIN16__ |
| 112 | msg.Printf(wxT("CreateWindowEx failed")); |
| 113 | #else |
| 114 | msg.Printf(wxT("CreateWindowEx failed with error number %ld"), (long) GetLastError()); |
| 115 | #endif |
| 116 | wxFAIL_MSG(msg); |
| 117 | } |
| 118 | |
| 119 | // Subclass again for purposes of dialog editing mode |
| 120 | SubclassWin(m_hWnd); |
| 121 | |
| 122 | SetFont(parent->GetFont()); |
| 123 | |
| 124 | SetSize(pos.x, pos.y, size.x, size.y); |
| 125 | |
| 126 | return TRUE; |
| 127 | } |
| 128 | |
| 129 | wxButton::~wxButton() |
| 130 | { |
| 131 | } |
| 132 | |
| 133 | // ---------------------------------------------------------------------------- |
| 134 | // size management including autosizing |
| 135 | // ---------------------------------------------------------------------------- |
| 136 | |
| 137 | wxSize wxButton::DoGetBestSize() const |
| 138 | { |
| 139 | wxString label = wxGetWindowText(GetHWND()); |
| 140 | int wBtn; |
| 141 | GetTextExtent(label, &wBtn, NULL); |
| 142 | |
| 143 | int wChar, hChar; |
| 144 | wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont()); |
| 145 | |
| 146 | // add a margin - the button is wider than just its label |
| 147 | wBtn += 3*wChar; |
| 148 | |
| 149 | // the button height is proportional to the height of the font used |
| 150 | int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar); |
| 151 | |
| 152 | wxSize sz = GetDefaultSize(); |
| 153 | if (wBtn > sz.x) sz.x = wBtn; |
| 154 | if (hBtn > sz.y) sz.y = hBtn; |
| 155 | |
| 156 | return sz; |
| 157 | } |
| 158 | |
| 159 | /* static */ |
| 160 | wxSize wxButtonBase::GetDefaultSize() |
| 161 | { |
| 162 | static wxSize s_sizeBtn; |
| 163 | |
| 164 | if ( s_sizeBtn.x == 0 ) |
| 165 | { |
| 166 | wxScreenDC dc; |
| 167 | dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); |
| 168 | |
| 169 | // the size of a standard button in the dialog units is 50x14, |
| 170 | // translate this to pixels |
| 171 | // NB1: the multipliers come from the Windows convention |
| 172 | // NB2: the extra +1/+2 were needed to get the size be the same as the |
| 173 | // size of the buttons in the standard dialog - I don't know how |
| 174 | // this happens, but on my system this size is 75x23 in pixels and |
| 175 | // 23*8 isn't even divisible by 14... Would be nice to understand |
| 176 | // why these constants are needed though! |
| 177 | s_sizeBtn.x = (50 * (dc.GetCharWidth() + 1))/4; |
| 178 | s_sizeBtn.y = ((14 * dc.GetCharHeight()) + 2)/8; |
| 179 | } |
| 180 | |
| 181 | return s_sizeBtn; |
| 182 | } |
| 183 | |
| 184 | // ---------------------------------------------------------------------------- |
| 185 | // set this button as the default one in its panel |
| 186 | // ---------------------------------------------------------------------------- |
| 187 | |
| 188 | void wxButton::SetDefault() |
| 189 | { |
| 190 | wxWindow *parent = GetParent(); |
| 191 | wxButton *btnOldDefault; |
| 192 | if ( parent ) |
| 193 | { |
| 194 | wxWindow *winOldDefault = parent->SetDefaultItem(this); |
| 195 | btnOldDefault = wxDynamicCast(winOldDefault, wxButton); |
| 196 | |
| 197 | ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L); |
| 198 | } |
| 199 | else // is a button without parent really normal? |
| 200 | { |
| 201 | btnOldDefault = NULL; |
| 202 | } |
| 203 | |
| 204 | if ( btnOldDefault && btnOldDefault != this ) |
| 205 | { |
| 206 | // remove the BS_DEFPUSHBUTTON style from the other button |
| 207 | long style = GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE); |
| 208 | |
| 209 | // don't do it with the owner drawn buttons because it will reset |
| 210 | // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)! |
| 211 | if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) |
| 212 | { |
| 213 | style &= ~BS_DEFPUSHBUTTON; |
| 214 | SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L); |
| 215 | } |
| 216 | else |
| 217 | { |
| 218 | // redraw the button - it will notice itself that it's not the |
| 219 | // default one any longer |
| 220 | btnOldDefault->Refresh(); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | // set this button as the default |
| 225 | long style = GetWindowLong(GetHwnd(), GWL_STYLE); |
| 226 | if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) |
| 227 | { |
| 228 | style |= BS_DEFPUSHBUTTON; |
| 229 | SendMessage(GetHwnd(), BM_SETSTYLE, style, 1L); |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | // ---------------------------------------------------------------------------- |
| 234 | // helpers |
| 235 | // ---------------------------------------------------------------------------- |
| 236 | |
| 237 | bool wxButton::SendClickEvent() |
| 238 | { |
| 239 | wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId()); |
| 240 | event.SetEventObject(this); |
| 241 | |
| 242 | return ProcessCommand(event); |
| 243 | } |
| 244 | |
| 245 | void wxButton::Command(wxCommandEvent & event) |
| 246 | { |
| 247 | ProcessCommand(event); |
| 248 | } |
| 249 | |
| 250 | // ---------------------------------------------------------------------------- |
| 251 | // event/message handlers |
| 252 | // ---------------------------------------------------------------------------- |
| 253 | |
| 254 | bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) |
| 255 | { |
| 256 | bool processed = FALSE; |
| 257 | switch ( param ) |
| 258 | { |
| 259 | case 1: // message came from an accelerator |
| 260 | case BN_CLICKED: // normal buttons send this |
| 261 | case BN_DOUBLECLICKED: // owner-drawn ones also send this |
| 262 | processed = SendClickEvent(); |
| 263 | break; |
| 264 | } |
| 265 | |
| 266 | return processed; |
| 267 | } |
| 268 | |
| 269 | long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam) |
| 270 | { |
| 271 | // when we receive focus, we want to become the default button in our |
| 272 | // parent panel |
| 273 | if ( nMsg == WM_SETFOCUS ) |
| 274 | { |
| 275 | SetDefault(); |
| 276 | |
| 277 | // let the default processign take place too |
| 278 | } |
| 279 | else if ( nMsg == WM_LBUTTONDBLCLK ) |
| 280 | { |
| 281 | // emulate a click event to force an owner-drawn button to change its |
| 282 | // appearance - without this, it won't do it |
| 283 | (void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam); |
| 284 | |
| 285 | // and conitnue with processing the message normally as well |
| 286 | } |
| 287 | |
| 288 | // let the base class do all real processing |
| 289 | return wxControl::MSWWindowProc(nMsg, wParam, lParam); |
| 290 | } |
| 291 | |
| 292 | // ---------------------------------------------------------------------------- |
| 293 | // owner-drawn buttons support |
| 294 | // ---------------------------------------------------------------------------- |
| 295 | |
| 296 | #ifdef __WIN32__ |
| 297 | |
| 298 | // drawing helpers |
| 299 | |
| 300 | static void DrawButtonText(HDC hdc, |
| 301 | RECT *pRect, |
| 302 | const wxString& text, |
| 303 | COLORREF col) |
| 304 | { |
| 305 | COLORREF colOld = SetTextColor(hdc, col); |
| 306 | int modeOld = SetBkMode(hdc, TRANSPARENT); |
| 307 | |
| 308 | DrawText(hdc, text, text.length(), pRect, |
| 309 | DT_CENTER | DT_VCENTER | DT_SINGLELINE); |
| 310 | |
| 311 | SetBkMode(hdc, modeOld); |
| 312 | SetTextColor(hdc, colOld); |
| 313 | } |
| 314 | |
| 315 | static void DrawRect(HDC hdc, const RECT& r) |
| 316 | { |
| 317 | MoveToEx(hdc, r.left, r.top, NULL); |
| 318 | LineTo(hdc, r.right, r.top); |
| 319 | LineTo(hdc, r.right, r.bottom); |
| 320 | LineTo(hdc, r.left, r.bottom); |
| 321 | LineTo(hdc, r.left, r.top); |
| 322 | } |
| 323 | |
| 324 | void wxButton::MakeOwnerDrawn() |
| 325 | { |
| 326 | long style = GetWindowLong(GetHwnd(), GWL_STYLE); |
| 327 | if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW ) |
| 328 | { |
| 329 | // make it so |
| 330 | style |= BS_OWNERDRAW; |
| 331 | SetWindowLong(GetHwnd(), GWL_STYLE, style); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | bool wxButton::SetBackgroundColour(const wxColour &colour) |
| 336 | { |
| 337 | if ( !wxControl::SetBackgroundColour(colour) ) |
| 338 | { |
| 339 | // nothing to do |
| 340 | return FALSE; |
| 341 | } |
| 342 | |
| 343 | MakeOwnerDrawn(); |
| 344 | |
| 345 | Refresh(); |
| 346 | |
| 347 | return TRUE; |
| 348 | } |
| 349 | |
| 350 | bool wxButton::SetForegroundColour(const wxColour &colour) |
| 351 | { |
| 352 | if ( !wxControl::SetForegroundColour(colour) ) |
| 353 | { |
| 354 | // nothing to do |
| 355 | return FALSE; |
| 356 | } |
| 357 | |
| 358 | MakeOwnerDrawn(); |
| 359 | |
| 360 | Refresh(); |
| 361 | |
| 362 | return TRUE; |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | The button frame looks like this normally: |
| 367 | |
| 368 | WWWWWWWWWWWWWWWWWWB |
| 369 | WHHHHHHHHHHHHHHHHGB W = white (HILIGHT) |
| 370 | WH GB H = light grey (LIGHT) |
| 371 | WH GB G = dark grey (SHADOW) |
| 372 | WH GB B = black (DKSHADOW) |
| 373 | WH GB |
| 374 | WGGGGGGGGGGGGGGGGGB |
| 375 | BBBBBBBBBBBBBBBBBBB |
| 376 | |
| 377 | When the button is selected, the button becomes like this (the total button |
| 378 | size doesn't change): |
| 379 | |
| 380 | BBBBBBBBBBBBBBBBBBB |
| 381 | BWWWWWWWWWWWWWWWWBB |
| 382 | BWHHHHHHHHHHHHHHGBB |
| 383 | BWH GBB |
| 384 | BWH GBB |
| 385 | BWGGGGGGGGGGGGGGGBB |
| 386 | BBBBBBBBBBBBBBBBBBB |
| 387 | BBBBBBBBBBBBBBBBBBB |
| 388 | |
| 389 | When the button is pushed (while selected) it is like: |
| 390 | |
| 391 | BBBBBBBBBBBBBBBBBBB |
| 392 | BGGGGGGGGGGGGGGGGGB |
| 393 | BG GB |
| 394 | BG GB |
| 395 | BG GB |
| 396 | BG GB |
| 397 | BGGGGGGGGGGGGGGGGGB |
| 398 | BBBBBBBBBBBBBBBBBBB |
| 399 | */ |
| 400 | |
| 401 | static void DrawButtonFrame(HDC hdc, const RECT& rectBtn, |
| 402 | bool selected, bool pushed) |
| 403 | { |
| 404 | RECT r; |
| 405 | CopyRect(&r, &rectBtn); |
| 406 | |
| 407 | HPEN hpenBlack = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)), |
| 408 | hpenGrey = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)), |
| 409 | hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)), |
| 410 | hpenWhite = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT)); |
| 411 | |
| 412 | HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack); |
| 413 | |
| 414 | r.right--; |
| 415 | r.bottom--; |
| 416 | |
| 417 | if ( pushed ) |
| 418 | { |
| 419 | DrawRect(hdc, r); |
| 420 | |
| 421 | (void)SelectObject(hdc, hpenGrey); |
| 422 | InflateRect(&r, -1, -1); |
| 423 | |
| 424 | DrawRect(hdc, r); |
| 425 | } |
| 426 | else // !pushed |
| 427 | { |
| 428 | if ( selected ) |
| 429 | { |
| 430 | DrawRect(hdc, r); |
| 431 | |
| 432 | InflateRect(&r, -1, -1); |
| 433 | } |
| 434 | |
| 435 | MoveToEx(hdc, r.left, r.bottom, NULL); |
| 436 | LineTo(hdc, r.right, r.bottom); |
| 437 | LineTo(hdc, r.right, r.top - 1); |
| 438 | |
| 439 | (void)SelectObject(hdc, hpenWhite); |
| 440 | MoveToEx(hdc, r.left, r.bottom - 1, NULL); |
| 441 | LineTo(hdc, r.left, r.top); |
| 442 | LineTo(hdc, r.right, r.top); |
| 443 | |
| 444 | (void)SelectObject(hdc, hpenLightGr); |
| 445 | MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL); |
| 446 | LineTo(hdc, r.left + 1, r.top + 1); |
| 447 | LineTo(hdc, r.right - 1, r.top + 1); |
| 448 | |
| 449 | (void)SelectObject(hdc, hpenGrey); |
| 450 | MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL); |
| 451 | LineTo(hdc, r.right - 1, r.bottom - 1); |
| 452 | LineTo(hdc, r.right - 1, r.top); |
| 453 | } |
| 454 | |
| 455 | (void)SelectObject(hdc, hpenOld); |
| 456 | DeleteObject(hpenWhite); |
| 457 | DeleteObject(hpenLightGr); |
| 458 | DeleteObject(hpenGrey); |
| 459 | DeleteObject(hpenBlack); |
| 460 | } |
| 461 | |
| 462 | bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis) |
| 463 | { |
| 464 | LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis; |
| 465 | |
| 466 | RECT rectBtn; |
| 467 | CopyRect(&rectBtn, &lpDIS->rcItem); |
| 468 | |
| 469 | COLORREF colBg = wxColourToRGB(GetBackgroundColour()), |
| 470 | colFg = wxColourToRGB(GetForegroundColour()); |
| 471 | |
| 472 | HDC hdc = lpDIS->hDC; |
| 473 | UINT state = lpDIS->itemState; |
| 474 | |
| 475 | // first, draw the background |
| 476 | HBRUSH hbrushBackground = ::CreateSolidBrush(colBg); |
| 477 | |
| 478 | FillRect(hdc, &rectBtn, hbrushBackground); |
| 479 | |
| 480 | // draw the border for the current state |
| 481 | bool selected = (state & ODS_SELECTED) != 0; |
| 482 | if ( !selected ) |
| 483 | { |
| 484 | wxPanel *panel = wxDynamicCast(GetParent(), wxPanel); |
| 485 | if ( panel ) |
| 486 | { |
| 487 | selected = panel->GetDefaultItem() == this; |
| 488 | } |
| 489 | } |
| 490 | bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0; |
| 491 | |
| 492 | DrawButtonFrame(hdc, rectBtn, selected, pushed); |
| 493 | |
| 494 | // draw the focus rect if needed |
| 495 | if ( state & ODS_FOCUS ) |
| 496 | { |
| 497 | RECT rectFocus; |
| 498 | CopyRect(&rectFocus, &rectBtn); |
| 499 | |
| 500 | // I don't know where does this constant come from, but this is how |
| 501 | // Windows draws them |
| 502 | InflateRect(&rectFocus, -4, -4); |
| 503 | |
| 504 | DrawFocusRect(hdc, &rectFocus); |
| 505 | } |
| 506 | |
| 507 | if ( pushed ) |
| 508 | { |
| 509 | // the label is shifted by 1 pixel to create "pushed" effect |
| 510 | OffsetRect(&rectBtn, 1, 1); |
| 511 | } |
| 512 | |
| 513 | DrawButtonText(hdc, &rectBtn, GetLabel(), |
| 514 | state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT) |
| 515 | : colFg); |
| 516 | |
| 517 | ::DeleteObject(hbrushBackground); |
| 518 | |
| 519 | return TRUE; |
| 520 | } |
| 521 | |
| 522 | #endif // __WIN32__ |
| 523 | |
| 524 | #endif // wxUSE_BUTTON |
| 525 | |