dlls/comctl32/theme_button.c

   1 /*
   2  * Theming - Button control
   3  *
   4  * Copyright (c) 2008 by Reece H. Dunn
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "winuser.h"
  30 #include "uxtheme.h"
  31 #include "vssym32.h"
  32 #include "comctl32.h"
  33
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(theme_button);
  37
  38 #define BUTTON_TYPE 0x0f /* bit mask for the available button types */
  39
  40 /* These are indices into a states array to determine the theme state for a given theme part. */
  41 typedef enum
  42 {
  43         STATE_NORMAL,
  44         STATE_DISABLED,
  45         STATE_HOT,
  46         STATE_PRESSED,
  47         STATE_DEFAULTED
  48 } ButtonState;
  49
  50 typedef void (*pfThemedPaint)(HTHEME theme, HWND hwnd, HDC hdc, ButtonState drawState, UINT dtFlags, BOOL focused);
  51
  52 static UINT get_drawtext_flags(DWORD style, DWORD ex_style)
  53 {
  54     UINT flags = 0;
  55
  56     if (style & BS_PUSHLIKE)
  57         style &= ~BUTTON_TYPE;
  58
  59     if (!(style & BS_MULTILINE))
  60         flags |= DT_SINGLELINE;
  61     else
  62         flags |= DT_WORDBREAK;
  63
  64     switch (style & BS_CENTER)
  65     {
  66     case BS_LEFT:   flags |= DT_LEFT;   break;
  67     case BS_RIGHT:  flags |= DT_RIGHT;  break;
  68     case BS_CENTER: flags |= DT_CENTER; break;
  69     default:
  70         flags |= ((style & BUTTON_TYPE) <= BS_DEFPUSHBUTTON)
  71                ? DT_CENTER : DT_LEFT;
  72     }
  73
  74     if (ex_style & WS_EX_RIGHT)
  75         flags = DT_RIGHT | (flags & ~(DT_LEFT | DT_CENTER));
  76
  77     if ((style & BUTTON_TYPE) != BS_GROUPBOX)
  78     {
  79         switch (style & BS_VCENTER)
  80         {
  81         case BS_TOP:     flags |= DT_TOP;     break;
  82         case BS_BOTTOM:  flags |= DT_BOTTOM;  break;
  83         case BS_VCENTER: /* fall through */
  84         default:         flags |= DT_VCENTER; break;
  85         }
  86     }
  87     else
  88         /* GroupBox's text is always single line and is top aligned. */
  89         flags |= DT_SINGLELINE | DT_TOP;
  90
  91     return flags;
  92 }
  93
  94 static inline WCHAR *get_button_text(HWND hwnd)
  95 {
  96     INT len = 512;
  97     WCHAR *text;
  98     text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
  99     if (text) InternalGetWindowText(hwnd, text, len + 1);
 100     return text;
 101 }
 102
 103 static void PB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
 104 {
 105     static const int states[] = { PBS_NORMAL, PBS_DISABLED, PBS_HOT, PBS_PRESSED, PBS_DEFAULTED };
 106
 107     RECT bgRect, textRect;
 108     HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 109     HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
 110     int state = states[ drawState ];
 111     WCHAR *text = get_button_text(hwnd);
 112
 113     GetClientRect(hwnd, &bgRect);
 114     GetThemeBackgroundContentRect(theme, hDC, BP_PUSHBUTTON, state, &bgRect, &textRect);
 115
 116     if (IsThemeBackgroundPartiallyTransparent(theme, BP_PUSHBUTTON, state))
 117         DrawThemeParentBackground(hwnd, hDC, NULL);
 118     DrawThemeBackground(theme, hDC, BP_PUSHBUTTON, state, &bgRect, NULL);
 119     if (text)
 120     {
 121         DrawThemeText(theme, hDC, BP_PUSHBUTTON, state, text, lstrlenW(text), dtFlags, 0, &textRect);
 122         HeapFree(GetProcessHeap(), 0, text);
 123     }
 124
 125     if (focused)
 126     {
 127         MARGINS margins;
 128         RECT focusRect = bgRect;
 129
 130         GetThemeMargins(theme, hDC, BP_PUSHBUTTON, state, TMT_CONTENTMARGINS, NULL, &margins);
 131
 132         focusRect.left += margins.cxLeftWidth;
 133         focusRect.top += margins.cyTopHeight;
 134         focusRect.right -= margins.cxRightWidth;
 135         focusRect.bottom -= margins.cyBottomHeight;
 136
 137         DrawFocusRect( hDC, &focusRect );
 138     }
 139
 140     if (hPrevFont) SelectObject(hDC, hPrevFont);
 141 }
 142
 143 static void CB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
 144 {
 145     static const int cb_states[3][5] =
 146     {
 147         { CBS_UNCHECKEDNORMAL, CBS_UNCHECKEDDISABLED, CBS_UNCHECKEDHOT, CBS_UNCHECKEDPRESSED, CBS_UNCHECKEDNORMAL },
 148         { CBS_CHECKEDNORMAL, CBS_CHECKEDDISABLED, CBS_CHECKEDHOT, CBS_CHECKEDPRESSED, CBS_CHECKEDNORMAL },
 149         { CBS_MIXEDNORMAL, CBS_MIXEDDISABLED, CBS_MIXEDHOT, CBS_MIXEDPRESSED, CBS_MIXEDNORMAL }
 150     };
 151
 152     static const int rb_states[2][5] =
 153     {
 154         { RBS_UNCHECKEDNORMAL, RBS_UNCHECKEDDISABLED, RBS_UNCHECKEDHOT, RBS_UNCHECKEDPRESSED, RBS_UNCHECKEDNORMAL },
 155         { RBS_CHECKEDNORMAL, RBS_CHECKEDDISABLED, RBS_CHECKEDHOT, RBS_CHECKEDPRESSED, RBS_CHECKEDNORMAL }
 156     };
 157
 158     static const int cb_size = 13;
 159
 160     RECT bgRect, textRect;
 161     HFONT font, hPrevFont = NULL;
 162     LRESULT checkState = SendMessageW(hwnd, BM_GETCHECK, 0, 0);
 163     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 164     int part = ((dwStyle & BUTTON_TYPE) == BS_RADIOBUTTON) || ((dwStyle & BUTTON_TYPE) == BS_AUTORADIOBUTTON)
 165              ? BP_RADIOBUTTON
 166              : BP_CHECKBOX;
 167     int state = (part == BP_CHECKBOX)
 168               ? cb_states[ checkState ][ drawState ]
 169               : rb_states[ checkState ][ drawState ];
 170     WCHAR *text = get_button_text(hwnd);
 171     LOGFONTW lf;
 172     BOOL created_font = FALSE;
 173
 174     HRESULT hr = GetThemeFont(theme, hDC, part, state, TMT_FONT, &lf);
 175     if (SUCCEEDED(hr)) {
 176         font = CreateFontIndirectW(&lf);
 177         if (!font)
 178             TRACE("Failed to create font\n");
 179         else {
 180             TRACE("font = %s\n", debugstr_w(lf.lfFaceName));
 181             hPrevFont = SelectObject(hDC, font);
 182             created_font = TRUE;
 183         }
 184     } else {
 185         font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 186         hPrevFont = SelectObject(hDC, font);
 187     }
 188
 189     GetClientRect(hwnd, &bgRect);
 190     GetThemeBackgroundContentRect(theme, hDC, part, state, &bgRect, &textRect);
 191
 192     if (dtFlags & DT_SINGLELINE) /* Center the checkbox / radio button to the text. */
 193         bgRect.top = bgRect.top + (textRect.bottom - textRect.top - cb_size) / 2;
 194
 195     /* adjust for the check/radio marker */
 196     bgRect.bottom = bgRect.top + cb_size;
 197     bgRect.right = bgRect.left + cb_size;
 198     textRect.left = bgRect.right + 6;
 199
 200     DrawThemeParentBackground(hwnd, hDC, NULL);
 201
 202     DrawThemeBackground(theme, hDC, part, state, &bgRect, NULL);
 203     if (text)
 204     {
 205         DrawThemeText(theme, hDC, part, state, text, lstrlenW(text), dtFlags, 0, &textRect);
 206
 207         if (focused)
 208         {
 209             RECT focusRect;
 210
 211             focusRect = textRect;
 212
 213             DrawTextW(hDC, text, lstrlenW(text), &focusRect, dtFlags | DT_CALCRECT);
 214
 215             if (focusRect.right < textRect.right) focusRect.right++;
 216             focusRect.bottom = textRect.bottom;
 217
 218             DrawFocusRect( hDC, &focusRect );
 219         }
 220
 221         HeapFree(GetProcessHeap(), 0, text);
 222     }
 223
 224     if (created_font) DeleteObject(font);
 225     if (hPrevFont) SelectObject(hDC, hPrevFont);
 226 }
 227
 228 static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
 229 {
 230     static const int states[] = { GBS_NORMAL, GBS_DISABLED, GBS_NORMAL, GBS_NORMAL, GBS_NORMAL };
 231
 232     RECT bgRect, textRect, contentRect;
 233     int state = states[ drawState ];
 234     WCHAR *text = get_button_text(hwnd);
 235     LOGFONTW lf;
 236     HFONT font, hPrevFont = NULL;
 237     BOOL created_font = FALSE;
 238
 239     HRESULT hr = GetThemeFont(theme, hDC, BP_GROUPBOX, state, TMT_FONT, &lf);
 240     if (SUCCEEDED(hr)) {
 241         font = CreateFontIndirectW(&lf);
 242         if (!font)
 243             TRACE("Failed to create font\n");
 244         else {
 245             hPrevFont = SelectObject(hDC, font);
 246             created_font = TRUE;
 247         }
 248     } else {
 249         font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 250         hPrevFont = SelectObject(hDC, font);
 251     }
 252
 253     GetClientRect(hwnd, &bgRect);
 254     textRect = bgRect;
 255
 256     if (text)
 257     {
 258         SIZE textExtent;
 259         GetTextExtentPoint32W(hDC, text, lstrlenW(text), &textExtent);
 260         bgRect.top += (textExtent.cy / 2);
 261         textRect.left += 10;
 262         textRect.bottom = textRect.top + textExtent.cy;
 263         textRect.right = textRect.left + textExtent.cx + 4;
 264
 265         ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
 266     }
 267
 268     GetThemeBackgroundContentRect(theme, hDC, BP_GROUPBOX, state, &bgRect, &contentRect);
 269     ExcludeClipRect(hDC, contentRect.left, contentRect.top, contentRect.right, contentRect.bottom);
 270
 271     if (IsThemeBackgroundPartiallyTransparent(theme, BP_GROUPBOX, state))
 272         DrawThemeParentBackground(hwnd, hDC, NULL);
 273     DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
 274
 275     SelectClipRgn(hDC, NULL);
 276
 277     if (text)
 278     {
 279         textRect.left += 2;
 280         textRect.right -= 2;
 281         DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, lstrlenW(text), 0, 0, &textRect);
 282         HeapFree(GetProcessHeap(), 0, text);
 283     }
 284
 285     if (created_font) DeleteObject(font);
 286     if (hPrevFont) SelectObject(hDC, hPrevFont);
 287 }
 288
 289 static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
 290 {
 291     PB_draw, /* BS_PUSHBUTTON */
 292     PB_draw, /* BS_DEFPUSHBUTTON */
 293     CB_draw, /* BS_CHECKBOX */
 294     CB_draw, /* BS_AUTOCHECKBOX */
 295     CB_draw, /* BS_RADIOBUTTON */
 296     CB_draw, /* BS_3STATE */
 297     CB_draw, /* BS_AUTO3STATE */
 298     GB_draw, /* BS_GROUPBOX */
 299     NULL, /* BS_USERBUTTON */
 300     CB_draw, /* BS_AUTORADIOBUTTON */
 301     NULL, /* Not defined */
 302     NULL, /* BS_OWNERDRAW */
 303     NULL, /* Not defined */
 304     NULL, /* Not defined */
 305     NULL, /* Not defined */
 306     NULL, /* Not defined */
 307 };
 308
 309 static BOOL BUTTON_Paint(HTHEME theme, HWND hwnd, HDC hParamDC)
 310 {
 311     PAINTSTRUCT ps;
 312     HDC hDC;
 313     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 314     DWORD dwStyleEx = GetWindowLongW(hwnd, GWL_EXSTYLE);
 315     UINT dtFlags = get_drawtext_flags(dwStyle, dwStyleEx);
 316     int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 317     ButtonState drawState;
 318     pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
 319
 320     if(!paint)
 321         return FALSE;
 322
 323     if(IsWindowEnabled(hwnd))
 324     {
 325         if(state & BST_PUSHED) drawState = STATE_PRESSED;
 326         else if(state & BST_HOT) drawState = STATE_HOT;
 327         else if(state & BST_FOCUS) drawState = STATE_DEFAULTED;
 328         else drawState = STATE_NORMAL;
 329     }
 330     else drawState = STATE_DISABLED;
 331
 332     hDC = hParamDC ? hParamDC : BeginPaint(hwnd, &ps);
 333     paint(theme, hwnd, hDC, drawState, dtFlags, state & BST_FOCUS);
 334     if (!hParamDC) EndPaint(hwnd, &ps);
 335     return TRUE;
 336 }
 337
 338 /**********************************************************************
 339  * The button control subclass window proc.
 340  */
 341 LRESULT CALLBACK THEMING_ButtonSubclassProc(HWND hwnd, UINT msg,
 342                                             WPARAM wParam, LPARAM lParam,
 343                                             ULONG_PTR dwRefData)
 344 {
 345     const WCHAR* themeClass = WC_BUTTONW;
 346     HTHEME theme;
 347     LRESULT result;
 348
 349     switch (msg)
 350     {
 351     case WM_CREATE:
 352         result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 353         OpenThemeData(hwnd, themeClass);
 354         return result;
 355
 356     case WM_DESTROY:
 357         theme = GetWindowTheme(hwnd);
 358         CloseThemeData (theme);
 359         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 360
 361     case WM_THEMECHANGED:
 362         theme = GetWindowTheme(hwnd);
 363         CloseThemeData (theme);
 364         OpenThemeData(hwnd, themeClass);
 365         break;
 366
 367     case WM_SYSCOLORCHANGE:
 368         theme = GetWindowTheme(hwnd);
 369         if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 370         /* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
 371          * which will do the repaint. */
 372         break;
 373
 374     case WM_PAINT:
 375         theme = GetWindowTheme(hwnd);
 376         if (theme && BUTTON_Paint(theme, hwnd, (HDC)wParam))
 377             return 0;
 378         else
 379             return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 380
 381     case WM_ENABLE:
 382         theme = GetWindowTheme(hwnd);
 383         if (theme) {
 384             RedrawWindow(hwnd, NULL, NULL, RDW_FRAME | RDW_INVALIDATE | RDW_UPDATENOW);
 385             return 0;
 386         } else
 387             return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 388
 389     case WM_MOUSEMOVE:
 390     {
 391         TRACKMOUSEEVENT mouse_event;
 392         mouse_event.cbSize = sizeof(TRACKMOUSEEVENT);
 393         mouse_event.dwFlags = TME_QUERY;
 394         if(!TrackMouseEvent(&mouse_event) || !(mouse_event.dwFlags&(TME_HOVER|TME_LEAVE)))
 395         {
 396             mouse_event.dwFlags = TME_HOVER|TME_LEAVE;
 397             mouse_event.hwndTrack = hwnd;
 398             mouse_event.dwHoverTime = 1;
 399             TrackMouseEvent(&mouse_event);
 400         }
 401         break;
 402     }
 403
 404     case WM_MOUSEHOVER:
 405     {
 406         int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 407         SetWindowLongW(hwnd, 0, state|BST_HOT);
 408         InvalidateRect(hwnd, NULL, FALSE);
 409         break;
 410     }
 411
 412     case WM_MOUSELEAVE:
 413     {
 414         int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 415         SetWindowLongW(hwnd, 0, state&(~BST_HOT));
 416         InvalidateRect(hwnd, NULL, FALSE);
 417         break;
 418     }
 419
 420     default:
 421         /* Call old proc */
 422         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 423     }
 424     return 0;
 425 }