reactos/dll/win32/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 "comctl32.h"
  23 WINE_DEFAULT_DEBUG_CHANNEL(theme_button);
  24
  25 #define BUTTON_TYPE 0x0f /* bit mask for the available button types */
  26
  27 /* These are indices into a states array to determine the theme state for a given theme part. */
  28 typedef enum
  29 {
  30         STATE_NORMAL,
  31         STATE_DISABLED,
  32         STATE_HOT,
  33         STATE_PRESSED,
  34         STATE_DEFAULTED
  35 } ButtonState;
  36
  37 typedef void (*pfThemedPaint)(HTHEME theme, HWND hwnd, HDC hdc, ButtonState drawState, UINT dtFlags, BOOL focused);
  38
  39 static UINT get_drawtext_flags(DWORD style, DWORD ex_style)
  40 {
  41     UINT flags = 0;
  42
  43     if (style & BS_PUSHLIKE)
  44         style &= ~BUTTON_TYPE;
  45
  46     if (!(style & BS_MULTILINE))
  47         flags |= DT_SINGLELINE;
  48     else
  49         flags |= DT_WORDBREAK;
  50
  51     switch (style & BS_CENTER)
  52     {
  53     case BS_LEFT:   flags |= DT_LEFT;   break;
  54     case BS_RIGHT:  flags |= DT_RIGHT;  break;
  55     case BS_CENTER: flags |= DT_CENTER; break;
  56     default:
  57         flags |= ((style & BUTTON_TYPE) <= BS_DEFPUSHBUTTON)
  58                ? DT_CENTER : DT_LEFT;
  59     }
  60
  61     if (ex_style & WS_EX_RIGHT)
  62         flags = DT_RIGHT | (flags & ~(DT_LEFT | DT_CENTER));
  63
  64     if ((style & BUTTON_TYPE) != BS_GROUPBOX)
  65     {
  66         switch (style & BS_VCENTER)
  67         {
  68         case BS_TOP:     flags |= DT_TOP;     break;
  69         case BS_BOTTOM:  flags |= DT_BOTTOM;  break;
  70         case BS_VCENTER: /* fall through */
  71         default:         flags |= DT_VCENTER; break;
  72         }
  73     }
  74     else
  75         /* GroupBox's text is always single line and is top aligned. */
  76         flags |= DT_SINGLELINE | DT_TOP;
  77
  78     return flags;
  79 }
  80
  81 static inline WCHAR *get_button_text(HWND hwnd)
  82 {
  83     INT len = 512;
  84     WCHAR *text;
  85     text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
  86     if (text) InternalGetWindowText(hwnd, text, len + 1);
  87     return text;
  88 }
  89
  90 static void PB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
  91 {
  92     static const int states[] = { PBS_NORMAL, PBS_DISABLED, PBS_HOT, PBS_PRESSED, PBS_DEFAULTED };
  93
  94     RECT bgRect, textRect;
  95     HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
  96     HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
  97     int state = states[ drawState ];
  98     WCHAR *text = get_button_text(hwnd);
  99
 100     GetClientRect(hwnd, &bgRect);
 101     GetThemeBackgroundContentRect(theme, hDC, BP_PUSHBUTTON, state, &bgRect, &textRect);
 102
 103     if (IsThemeBackgroundPartiallyTransparent(theme, BP_PUSHBUTTON, state))
 104         DrawThemeParentBackground(hwnd, hDC, NULL);
 105     DrawThemeBackground(theme, hDC, BP_PUSHBUTTON, state, &bgRect, NULL);
 106     if (text)
 107     {
 108         DrawThemeText(theme, hDC, BP_PUSHBUTTON, state, text, lstrlenW(text), dtFlags, 0, &textRect);
 109         HeapFree(GetProcessHeap(), 0, text);
 110     }
 111
 112     if (focused)
 113     {
 114         MARGINS margins;
 115         RECT focusRect = bgRect;
 116
 117         GetThemeMargins(theme, hDC, BP_PUSHBUTTON, state, TMT_CONTENTMARGINS, NULL, &margins);
 118
 119         focusRect.left += margins.cxLeftWidth;
 120         focusRect.top += margins.cyTopHeight;
 121         focusRect.right -= margins.cxRightWidth;
 122         focusRect.bottom -= margins.cyBottomHeight;
 123
 124         DrawFocusRect( hDC, &focusRect );
 125     }
 126
 127     if (hPrevFont) SelectObject(hDC, hPrevFont);
 128 }
 129
 130 static void CB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
 131 {
 132     static const int cb_states[3][5] =
 133     {
 134         { CBS_UNCHECKEDNORMAL, CBS_UNCHECKEDDISABLED, CBS_UNCHECKEDHOT, CBS_UNCHECKEDPRESSED, CBS_UNCHECKEDNORMAL },
 135         { CBS_CHECKEDNORMAL, CBS_CHECKEDDISABLED, CBS_CHECKEDHOT, CBS_CHECKEDPRESSED, CBS_CHECKEDNORMAL },
 136         { CBS_MIXEDNORMAL, CBS_MIXEDDISABLED, CBS_MIXEDHOT, CBS_MIXEDPRESSED, CBS_MIXEDNORMAL }
 137     };
 138
 139     static const int rb_states[2][5] =
 140     {
 141         { RBS_UNCHECKEDNORMAL, RBS_UNCHECKEDDISABLED, RBS_UNCHECKEDHOT, RBS_UNCHECKEDPRESSED, RBS_UNCHECKEDNORMAL },
 142         { RBS_CHECKEDNORMAL, RBS_CHECKEDDISABLED, RBS_CHECKEDHOT, RBS_CHECKEDPRESSED, RBS_CHECKEDNORMAL }
 143     };
 144
 145     SIZE sz;
 146     RECT bgRect, textRect;
 147     HFONT font, hPrevFont = NULL;
 148     LRESULT checkState = SendMessageW(hwnd, BM_GETCHECK, 0, 0);
 149     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 150     int part = ((dwStyle & BUTTON_TYPE) == BS_RADIOBUTTON) || ((dwStyle & BUTTON_TYPE) == BS_AUTORADIOBUTTON)
 151              ? BP_RADIOBUTTON
 152              : BP_CHECKBOX;
 153     int state = (part == BP_CHECKBOX)
 154               ? cb_states[ checkState ][ drawState ]
 155               : rb_states[ checkState ][ drawState ];
 156     WCHAR *text = get_button_text(hwnd);
 157     LOGFONTW lf;
 158     BOOL created_font = FALSE;
 159
 160     HRESULT hr = GetThemeFont(theme, hDC, part, state, TMT_FONT, &lf);
 161     if (SUCCEEDED(hr)) {
 162         font = CreateFontIndirectW(&lf);
 163         if (!font)
 164             TRACE("Failed to create font\n");
 165         else {
 166             TRACE("font = %s\n", debugstr_w(lf.lfFaceName));
 167             hPrevFont = SelectObject(hDC, font);
 168             created_font = TRUE;
 169         }
 170     } else {
 171         font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 172         hPrevFont = SelectObject(hDC, font);
 173     }
 174
 175     if (FAILED(GetThemePartSize(theme, hDC, part, state, NULL, TS_DRAW, &sz)))
 176         sz.cx = sz.cy = 13;
 177
 178     GetClientRect(hwnd, &bgRect);
 179     GetThemeBackgroundContentRect(theme, hDC, part, state, &bgRect, &textRect);
 180
 181     if (dtFlags & DT_SINGLELINE) /* Center the checkbox / radio button to the text. */
 182         bgRect.top = bgRect.top + (textRect.bottom - textRect.top - sz.cy) / 2;
 183
 184     /* adjust for the check/radio marker */
 185     bgRect.bottom = bgRect.top + sz.cy;
 186     bgRect.right = bgRect.left + sz.cx;
 187     textRect.left = bgRect.right + 6;
 188
 189     DrawThemeParentBackground(hwnd, hDC, NULL);
 190
 191     DrawThemeBackground(theme, hDC, part, state, &bgRect, NULL);
 192     if (text)
 193     {
 194         DrawThemeText(theme, hDC, part, state, text, lstrlenW(text), dtFlags, 0, &textRect);
 195
 196         if (focused)
 197         {
 198             RECT focusRect;
 199
 200             focusRect = textRect;
 201
 202             DrawTextW(hDC, text, lstrlenW(text), &focusRect, dtFlags | DT_CALCRECT);
 203
 204             if (focusRect.right < textRect.right) focusRect.right++;
 205             focusRect.bottom = textRect.bottom;
 206
 207             DrawFocusRect( hDC, &focusRect );
 208         }
 209
 210         HeapFree(GetProcessHeap(), 0, text);
 211     }
 212
 213     if (created_font) DeleteObject(font);
 214     if (hPrevFont) SelectObject(hDC, hPrevFont);
 215 }
 216
 217 static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags, BOOL focused)
 218 {
 219     static const int states[] = { GBS_NORMAL, GBS_DISABLED, GBS_NORMAL, GBS_NORMAL, GBS_NORMAL };
 220
 221     RECT bgRect, textRect, contentRect;
 222     int state = states[ drawState ];
 223     WCHAR *text = get_button_text(hwnd);
 224     LOGFONTW lf;
 225     HFONT font, hPrevFont = NULL;
 226     BOOL created_font = FALSE;
 227
 228     HRESULT hr = GetThemeFont(theme, hDC, BP_GROUPBOX, state, TMT_FONT, &lf);
 229     if (SUCCEEDED(hr)) {
 230         font = CreateFontIndirectW(&lf);
 231         if (!font)
 232             TRACE("Failed to create font\n");
 233         else {
 234             hPrevFont = SelectObject(hDC, font);
 235             created_font = TRUE;
 236         }
 237     } else {
 238         font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 239         hPrevFont = SelectObject(hDC, font);
 240     }
 241
 242     GetClientRect(hwnd, &bgRect);
 243     textRect = bgRect;
 244
 245     if (text)
 246     {
 247         SIZE textExtent;
 248         GetTextExtentPoint32W(hDC, text, lstrlenW(text), &textExtent);
 249         bgRect.top += (textExtent.cy / 2);
 250         textRect.left += 10;
 251         textRect.bottom = textRect.top + textExtent.cy;
 252         textRect.right = textRect.left + textExtent.cx + 4;
 253
 254         ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
 255     }
 256
 257     GetThemeBackgroundContentRect(theme, hDC, BP_GROUPBOX, state, &bgRect, &contentRect);
 258     ExcludeClipRect(hDC, contentRect.left, contentRect.top, contentRect.right, contentRect.bottom);
 259
 260     if (IsThemeBackgroundPartiallyTransparent(theme, BP_GROUPBOX, state))
 261         DrawThemeParentBackground(hwnd, hDC, NULL);
 262     DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
 263
 264     SelectClipRgn(hDC, NULL);
 265
 266     if (text)
 267     {
 268         InflateRect(&textRect, -2, 0);
 269         DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, lstrlenW(text), 0, 0, &textRect);
 270         HeapFree(GetProcessHeap(), 0, text);
 271     }
 272
 273     if (created_font) DeleteObject(font);
 274     if (hPrevFont) SelectObject(hDC, hPrevFont);
 275 }
 276
 277 static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
 278 {
 279     PB_draw, /* BS_PUSHBUTTON */
 280     PB_draw, /* BS_DEFPUSHBUTTON */
 281     CB_draw, /* BS_CHECKBOX */
 282     CB_draw, /* BS_AUTOCHECKBOX */
 283     CB_draw, /* BS_RADIOBUTTON */
 284     CB_draw, /* BS_3STATE */
 285     CB_draw, /* BS_AUTO3STATE */
 286     GB_draw, /* BS_GROUPBOX */
 287     NULL, /* BS_USERBUTTON */
 288     CB_draw, /* BS_AUTORADIOBUTTON */
 289     NULL, /* Not defined */
 290     NULL, /* BS_OWNERDRAW */
 291     NULL, /* Not defined */
 292     NULL, /* Not defined */
 293     NULL, /* Not defined */
 294     NULL, /* Not defined */
 295 };
 296
 297 BOOL BUTTON_PaintWithTheme(HTHEME theme, HWND hwnd, HDC hParamDC)
 298 {
 299     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 300     DWORD dwStyleEx = GetWindowLongW(hwnd, GWL_EXSTYLE);
 301     UINT dtFlags = get_drawtext_flags(dwStyle, dwStyleEx);
 302     int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 303     ButtonState drawState;
 304     pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
 305     if (!paint)
 306         return FALSE;
 307
 308     if(IsWindowEnabled(hwnd))
 309     {
 310         if(state & BST_PUSHED) drawState = STATE_PRESSED;
 311         else if(state & BST_HOT) drawState = STATE_HOT;
 312         else if(state & BST_FOCUS) drawState = STATE_DEFAULTED;
 313         else drawState = STATE_NORMAL;
 314     }
 315     else drawState = STATE_DISABLED;
 316
 317     paint(theme, hwnd, hParamDC, drawState, dtFlags, state & BST_FOCUS);
 318     return TRUE;
 319 }