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 "tmschema.h"
  32 #include "comctl32.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(themingbutton);
  36
  37 #define BUTTON_TYPE 0x0f /* bit mask for the available button types */
  38
  39 typedef void (*pfThemedPaint)(HTHEME theme, HWND hwnd, HDC hdc);
  40
  41 static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC)
  42 {
  43     RECT bgRect, textRect;
  44     SIZE textExtent;
  45     HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
  46     HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
  47     int state = IsWindowEnabled(hwnd) ? GBS_NORMAL : GBS_DISABLED;
  48     WCHAR text[MAX_PATH];
  49     int len = MAX_PATH;
  50
  51     GetClientRect(hwnd, &bgRect);
  52     textRect = bgRect;
  53
  54     len = GetWindowTextW(hwnd, text, len);
  55
  56     GetTextExtentPoint32W(hDC, text, len, &textExtent);
  57
  58     bgRect.top += (textExtent.cy / 2);
  59     textRect.left += 10;
  60     textRect.bottom = textRect.top + textExtent.cy;
  61     textRect.right = textRect.left + textExtent.cx + 4;
  62
  63     ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
  64
  65     DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
  66
  67     SelectClipRgn(hDC, NULL);
  68
  69     textRect.left += 2;
  70     textRect.right -= 2;
  71     DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, len, 0, 0, &textRect);
  72
  73     if (hPrevFont) SelectObject(hDC, hPrevFont);
  74 }
  75
  76 static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
  77 {
  78     NULL, /* BS_PUSHBUTTON */
  79     NULL, /* BS_DEFPUSHBUTTON */
  80     NULL, /* BS_CHECKBOX */
  81     NULL, /* BS_AUTOCHECKBOX */
  82     NULL, /* BS_RADIOBUTTON */
  83     NULL, /* BS_3STATE */
  84     NULL, /* BS_AUTO3STATE */
  85     GB_draw, /* BS_GROUPBOX */
  86     NULL, /* BS_USERBUTTON */
  87     NULL, /* BS_AUTORADIOBUTTON */
  88     NULL, /* Not defined */
  89     NULL, /* BS_OWNERDRAW */
  90     NULL, /* Not defined */
  91     NULL, /* Not defined */
  92     NULL, /* Not defined */
  93     NULL, /* Not defined */
  94 };
  95
  96 static BOOL BUTTON_Paint(HTHEME theme, HWND hwnd, HDC hParamDC)
  97 {
  98     PAINTSTRUCT ps;
  99     HDC hDC;
 100     DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
 101     pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
 102
 103     if (paint)
 104     {
 105         hDC = hParamDC ? hParamDC : BeginPaint(hwnd, &ps);
 106         paint(theme, hwnd, hDC);
 107         if (!hParamDC) EndPaint(hwnd, &ps);
 108         return TRUE;
 109     }
 110
 111     return FALSE; /* Delegate drawing to the non-themed code. */
 112 }
 113
 114 /**********************************************************************
 115  * The button control subclass window proc.
 116  */
 117 LRESULT CALLBACK THEMING_ButtonSubclassProc(HWND hwnd, UINT msg,
 118                                             WPARAM wParam, LPARAM lParam,
 119                                             ULONG_PTR dwRefData)
 120 {
 121     const WCHAR* themeClass = WC_BUTTONW;
 122     HTHEME theme;
 123     LRESULT result;
 124
 125     switch (msg)
 126     {
 127     case WM_CREATE:
 128         result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 129         OpenThemeData(hwnd, themeClass);
 130         return result;
 131
 132     case WM_DESTROY:
 133         theme = GetWindowTheme(hwnd);
 134         CloseThemeData (theme);
 135         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 136
 137     case WM_THEMECHANGED:
 138         theme = GetWindowTheme(hwnd);
 139         CloseThemeData (theme);
 140         OpenThemeData(hwnd, themeClass);
 141         break;
 142
 143     case WM_SYSCOLORCHANGE:
 144         theme = GetWindowTheme(hwnd);
 145         if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 146         /* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
 147          * which will do the repaint. */
 148         break;
 149
 150     case WM_PAINT:
 151         theme = GetWindowTheme(hwnd);
 152         if (theme && BUTTON_Paint(theme, hwnd, (HDC)wParam))
 153             return 0;
 154         else
 155             return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 156
 157     case WM_ENABLE:
 158         theme = GetWindowTheme(hwnd);
 159         if (theme) RedrawWindow(hwnd, NULL, NULL,
 160                                 RDW_FRAME | RDW_INVALIDATE | RDW_UPDATENOW);
 161         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 162
 163     default:
 164         /* Call old proc */
 165         return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
 166     }
 167     return 0;
 168 }