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);
  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)
 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 (hPrevFont) SelectObject(hDC, hPrevFont);
 126 }
 127
 128 static void CB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
 129 {
 130     static const int cb_states[3][5] =
 131     {
 132         { CBS_UNCHECKEDNORMAL, CBS_UNCHECKEDDISABLED, CBS_UNCHECKEDHOT, CBS_UNCHECKEDPRESSED, CBS_UNCHECKEDNORMAL },
 133         { CBS_CHECKEDNORMAL, CBS_CHECKEDDISABLED, CBS_CHECKEDHOT, CBS_CHECKEDPRESSED, CBS_CHECKEDNORMAL },
 134         { CBS_MIXEDNORMAL, CBS_MIXEDDISABLED, CBS_MIXEDHOT, CBS_MIXEDPRESSED, CBS_MIXEDNORMAL }
 135     };
 136
 137     static const int rb_states[2][5] =
 138     {
 139         { RBS_UNCHECKEDNORMAL, RBS_UNCHECKEDDISABLED, RBS_UNCHECKEDHOT, RBS_UNCHECKEDPRESSED, RBS_UNCHECKEDNORMAL },
 140         { RBS_CHECKEDNORMAL, RBS_CHECKEDDISABLED, RBS_CHECKEDHOT, RBS_CHECKEDPRESSED, RBS_CHECKEDNORMAL }
 141     };
 142
 143     static const int cb_size = 13;
 144
 145     RECT bgRect, textRect;
 146     HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 147     HFONT hPrevFont = font ? SelectObject(hDC, font) : 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
 158     GetClientRect(hwnd, &bgRect);
 159     GetThemeBackgroundContentRect(theme, hDC, part, state, &bgRect, &textRect);
 160
 161     if (dtFlags & DT_SINGLELINE) /* Center the checkbox / radio button to the text. */
 162         bgRect.top = bgRect.top + (textRect.bottom - textRect.top - cb_size) / 2;
 163
 164     /* adjust for the check/radio marker */
 165     bgRect.bottom = bgRect.top + cb_size;
 166     bgRect.right = bgRect.left + cb_size;
 167     textRect.left = bgRect.right + 6;
 168
 169     DrawThemeParentBackground(hwnd, hDC, NULL);
 170
 171     DrawThemeBackground(theme, hDC, part, state, &bgRect, NULL);
 172     if (text)
 173     {
 174         DrawThemeText(theme, hDC, part, state, text, lstrlenW(text), dtFlags, 0, &textRect);
 175         HeapFree(GetProcessHeap(), 0, text);
 176     }
 177
 178     if (hPrevFont) SelectObject(hDC, hPrevFont);
 179 }
 180
 181 static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
 182 {
 183     static const int states[] = { GBS_NORMAL, GBS_DISABLED, GBS_NORMAL, GBS_NORMAL, GBS_NORMAL };
 184
 185     RECT bgRect, textRect, contentRect;
 186     int state = states[ drawState ];
 187     WCHAR *text = get_button_text(hwnd);
 188     LOGFONTW lf;
 189     HFONT font, hPrevFont = NULL;
 190     BOOL created_font = FALSE;
 191
 192     HRESULT hr = GetThemeFont(theme, hDC, BP_GROUPBOX, state, TMT_FONT, &lf);
 193     if (SUCCEEDED(hr)) {
 194         font = CreateFontIndirectW(&lf);
 195         if (!font)
 196             TRACE("Failed to create font\n");
 197         else {
 198             hPrevFont = SelectObject(hDC, font);
 199             created_font = TRUE;
 200         }
 201     } else
 202         font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
 203
 204     GetClientRect(hwnd, &bgRect);
 205     textRect = bgRect;
 206
 207     if (text)
 208     {
 209         SIZE textExtent;
 210         GetTextExtentPoint32W(hDC, text, lstrlenW(text), &textExtent);
 211         bgRect.top += (textExtent.cy / 2);
 212         textRect.left += 10;
 213         textRect.bottom = textRect.top + textExtent.cy;
 214         textRect.right = textRect.left + textExtent.cx + 4;
 215
 216         ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
 217     }
 218
 219     GetThemeBackgroundContentRect(theme, hDC, BP_GROUPBOX, state, &bgRect, &contentRect);
 220     ExcludeClipRect(hDC, contentRect.left, contentRect.top, contentRect.right, contentRect.bottom);
 221
 222     if (IsThemeBackgroundPartiallyTransparent(theme, BP_GROUPBOX, state))
 223         DrawThemeParentBackground(hwnd, hDC, NULL);
 224     DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
 225
 226     SelectClipRgn(hDC, NULL);
 227
 228     if (text)
 229     {
 230         textRect.left += 2;
 231         textRect.right -= 2;
 232         DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, lstrlenW(text), 0, 0, &textRect);
 233         HeapFree(GetProcessHeap(), 0, text);
 234     }
 235
 236     if (created_font) DeleteObject(font);
 237     if (hPrevFont) SelectObject(hDC, hPrevFont);
 238 }
 239
 240 static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
 241 {
 242     PB_draw, /* BS_PUSHBUTTON */
 243     PB_draw, /* BS_DEFPUSHBUTTON */
 244     CB_draw, /* BS_CHECKBOX */
 245     CB_draw, /* BS_AUTOCHECKBOX */
 246     CB_draw, /* BS_RADIOBUTTON */
 247     CB_draw, /* BS_3STATE */
 248     CB_draw, /* BS_AUTO3STATE */
 249     GB_draw, /* BS_GROUPBOX */
 250     NULL, /* BS_USERBUTTON */
 251     CB_draw, /* BS_AUTORADIOBUTTON */
 252     NULL, /* Not defined */
 253     NULL, /* BS_OWNERDRAW */
 254     NULL, /* Not defined */
 255     NULL, /* Not defined */
 256     NULL, /* Not defined */
 257     NULL, /* Not defined */
 258 };
 259
 260 static BOOL BUTTON_Paint(HTHEME theme, HWND hwnd, HDC hParamDC)
 261 {
 262     PAINTSTRUCT ps;
 263     HDC hDC;
 264     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 265     DWORD dwStyleEx = GetWindowLongW(hwnd, GWL_EXSTYLE);
 266     UINT dtFlags = get_drawtext_flags(dwStyle, dwStyleEx);
 267     int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 268     ButtonState drawState;
 269     pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
 270
 271     if(!paint)
 272         return FALSE;
 273
 274     if(IsWindowEnabled(hwnd))
 275     {
 276         if(state & BST_PUSHED) drawState = STATE_PRESSED;
 277         else if(state & BST_HOT) drawState = STATE_HOT;
 278         else if(state & BST_FOCUS) drawState = STATE_DEFAULTED;
 279         else drawState = STATE_NORMAL;
 280     }
 281     else drawState = STATE_DISABLED;
 282
 283     hDC = hParamDC ? hParamDC : BeginPaint(hwnd, &ps);
 284     paint(theme, hwnd, hDC, drawState, dtFlags);
 285     if (!hParamDC) EndPaint(hwnd, &ps);
 286     return TRUE;
 287 }
 288
 289 /**********************************************************************
 290  * The button control subclass window proc.
 291  */
 292 LRESULT CALLBACK THEMING_ButtonSubclassProc(HWND hwnd, UINT msg,
 293                                             WPARAM wParam, LPARAM lParam,
 294                                             ULONG_PTR dwRefData)
 295 {
 296     const WCHAR* themeClass = WC_BUTTONW;
 297     HTHEME theme;
 298     LRESULT result;
 299
 300     switch (msg)
 301     {
 302     case WM_CREATE:
 303         result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 304         OpenThemeData(hwnd, themeClass);
 305         return result;
 306
 307     case WM_DESTROY:
 308         theme = GetWindowTheme(hwnd);
 309         CloseThemeData (theme);
 310         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 311
 312     case WM_THEMECHANGED:
 313         theme = GetWindowTheme(hwnd);
 314         CloseThemeData (theme);
 315         OpenThemeData(hwnd, themeClass);
 316         break;
 317
 318     case WM_SYSCOLORCHANGE:
 319         theme = GetWindowTheme(hwnd);
 320         if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 321         /* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
 322          * which will do the repaint. */
 323         break;
 324
 325     case WM_PAINT:
 326         theme = GetWindowTheme(hwnd);
 327         if (theme && BUTTON_Paint(theme, hwnd, (HDC)wParam))
 328             return 0;
 329         else
 330             return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 331
 332     case WM_ENABLE:
 333         theme = GetWindowTheme(hwnd);
 334         if (theme) RedrawWindow(hwnd, NULL, NULL,
 335                                 RDW_FRAME | RDW_INVALIDATE | RDW_UPDATENOW);
 336         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 337
 338     case WM_MOUSEMOVE:
 339     {
 340         TRACKMOUSEEVENT mouse_event;
 341         mouse_event.cbSize = sizeof(TRACKMOUSEEVENT);
 342         mouse_event.dwFlags = TME_QUERY;
 343         if(!TrackMouseEvent(&mouse_event) || !(mouse_event.dwFlags&(TME_HOVER|TME_LEAVE)))
 344         {
 345             mouse_event.dwFlags = TME_HOVER|TME_LEAVE;
 346             mouse_event.hwndTrack = hwnd;
 347             mouse_event.dwHoverTime = 1;
 348             TrackMouseEvent(&mouse_event);
 349         }
 350         break;
 351     }
 352
 353     case WM_MOUSEHOVER:
 354     {
 355         int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 356         SetWindowLongW(hwnd, 0, state|BST_HOT);
 357         InvalidateRect(hwnd, NULL, FALSE);
 358         break;
 359     }
 360
 361     case WM_MOUSELEAVE:
 362     {
 363         int state = (int)SendMessageW(hwnd, BM_GETSTATE, 0, 0);
 364         SetWindowLongW(hwnd, 0, state&(~BST_HOT));
 365         InvalidateRect(hwnd, NULL, FALSE);
 366         break;
 367     }
 368
 369     default:
 370         /* Call old proc */
 371         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 372     }
 373     return 0;
 374 }