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