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/*
* Theming - Button control
*
* Copyright (c) 2008 by Reece H. Dunn
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "uxtheme.h"
#include "tmschema.h"
#include "comctl32.h"
#define BUTTON_TYPE 0x0f /* bit mask for the available button types */
/* These are indices into a states array to determine the theme state for a given theme part. */
typedef enum
{
STATE_NORMAL,
STATE_DISABLED,
STATE_HOT,
STATE_PRESSED,
STATE_DEFAULTED
} ButtonState;
typedef void (*pfThemedPaint)(HTHEME theme, HWND hwnd, HDC hdc, ButtonState drawState, UINT dtFlags);
static UINT get_drawtext_flags(DWORD style, DWORD ex_style)
{
UINT flags = 0;
if (style & BS_PUSHLIKE)
style &= ~BUTTON_TYPE;
if (!(style & BS_MULTILINE))
flags |= DT_SINGLELINE;
else
flags |= DT_WORDBREAK;
switch (style & BS_CENTER)
{
case BS_LEFT: flags |= DT_LEFT; break;
case BS_RIGHT: flags |= DT_RIGHT; break;
case BS_CENTER: flags |= DT_CENTER; break;
default:
flags |= ((style & BUTTON_TYPE) <= BS_DEFPUSHBUTTON)
? DT_CENTER : DT_LEFT;
}
if (ex_style & WS_EX_RIGHT)
flags = DT_RIGHT | (flags & ~(DT_LEFT | DT_CENTER));
if ((style & BUTTON_TYPE) != BS_GROUPBOX)
{
switch (style & BS_VCENTER)
{
case BS_TOP: flags |= DT_TOP; break;
case BS_BOTTOM: flags |= DT_BOTTOM; break;
case BS_VCENTER: /* fall through */
default: flags |= DT_VCENTER; break;
}
}
else
/* GroupBox's text is always single line and is top aligned. */
flags |= DT_SINGLELINE | DT_TOP;
return flags;
}
static inline WCHAR *get_button_text(HWND hwnd)
{
INT len = 512;
WCHAR *text;
text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
if (text) InternalGetWindowText(hwnd, text, len + 1);
return text;
}
static void PB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
{
static const int states[] = { PBS_NORMAL, PBS_DISABLED, PBS_HOT, PBS_PRESSED, PBS_DEFAULTED };
RECT bgRect, textRect;
HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
int state = states[ drawState ];
WCHAR *text = get_button_text(hwnd);
GetClientRect(hwnd, &bgRect);
GetThemeBackgroundContentRect(theme, hDC, BP_PUSHBUTTON, state, &bgRect, &textRect);
if (IsThemeBackgroundPartiallyTransparent(theme, BP_PUSHBUTTON, state))
DrawThemeParentBackground(hwnd, hDC, NULL);
DrawThemeBackground(theme, hDC, BP_PUSHBUTTON, state, &bgRect, NULL);
if (text)
{
DrawThemeText(theme, hDC, BP_PUSHBUTTON, state, text, lstrlenW(text), dtFlags, 0, &textRect);
HeapFree(GetProcessHeap(), 0, text);
}
if (hPrevFont) SelectObject(hDC, hPrevFont);
}
static void CB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
{
static const int cb_states[3][5] =
{
{ CBS_UNCHECKEDNORMAL, CBS_UNCHECKEDDISABLED, CBS_UNCHECKEDHOT, CBS_UNCHECKEDPRESSED, CBS_UNCHECKEDNORMAL },
{ CBS_CHECKEDNORMAL, CBS_CHECKEDDISABLED, CBS_CHECKEDHOT, CBS_CHECKEDPRESSED, CBS_CHECKEDNORMAL },
{ CBS_MIXEDNORMAL, CBS_MIXEDDISABLED, CBS_MIXEDHOT, CBS_MIXEDPRESSED, CBS_MIXEDNORMAL }
};
static const int rb_states[2][5] =
{
{ RBS_UNCHECKEDNORMAL, RBS_UNCHECKEDDISABLED, RBS_UNCHECKEDHOT, RBS_UNCHECKEDPRESSED, RBS_UNCHECKEDNORMAL },
{ RBS_CHECKEDNORMAL, RBS_CHECKEDDISABLED, RBS_CHECKEDHOT, RBS_CHECKEDPRESSED, RBS_CHECKEDNORMAL }
};
static const int cb_size = 13;
RECT bgRect, textRect;
HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
LRESULT checkState = SendMessageW(hwnd, BM_GETCHECK, 0, 0);
DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
int part = ((dwStyle & BUTTON_TYPE) == BS_RADIOBUTTON) || ((dwStyle & BUTTON_TYPE) == BS_AUTORADIOBUTTON)
? BP_RADIOBUTTON
: BP_CHECKBOX;
int state = (part == BP_CHECKBOX)
? cb_states[ checkState ][ drawState ]
: rb_states[ checkState ][ drawState ];
WCHAR *text = get_button_text(hwnd);
GetClientRect(hwnd, &bgRect);
GetThemeBackgroundContentRect(theme, hDC, part, state, &bgRect, &textRect);
if (dtFlags & DT_SINGLELINE) /* Center the checkbox / radio button to the text. */
bgRect.top = bgRect.top + (textRect.bottom - textRect.top - cb_size) / 2;
/* adjust for the check/radio marker */
bgRect.bottom = bgRect.top + cb_size;
bgRect.right = bgRect.left + cb_size;
textRect.left = bgRect.right + 6;
if (IsThemeBackgroundPartiallyTransparent(theme, part, state))
DrawThemeParentBackground(hwnd, hDC, NULL);
DrawThemeBackground(theme, hDC, part, state, &bgRect, NULL);
if (text)
{
DrawThemeText(theme, hDC, part, state, text, lstrlenW(text), dtFlags, 0, &textRect);
HeapFree(GetProcessHeap(), 0, text);
}
if (hPrevFont) SelectObject(hDC, hPrevFont);
}
static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
{
static const int states[] = { GBS_NORMAL, GBS_DISABLED, GBS_NORMAL, GBS_NORMAL, GBS_NORMAL };
RECT bgRect, textRect, contentRect;
HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
int state = states[ drawState ];
WCHAR *text = get_button_text(hwnd);
GetClientRect(hwnd, &bgRect);
textRect = bgRect;
if (text)
{
SIZE textExtent;
GetTextExtentPoint32W(hDC, text, lstrlenW(text), &textExtent);
bgRect.top += (textExtent.cy / 2);
textRect.left += 10;
textRect.bottom = textRect.top + textExtent.cy;
textRect.right = textRect.left + textExtent.cx + 4;
ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
}
GetThemeBackgroundContentRect(theme, hDC, BP_GROUPBOX, state, &bgRect, &contentRect);
ExcludeClipRect(hDC, contentRect.left, contentRect.top, contentRect.right, contentRect.bottom);
if (IsThemeBackgroundPartiallyTransparent(theme, BP_GROUPBOX, state))
DrawThemeParentBackground(hwnd, hDC, NULL);
DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
SelectClipRgn(hDC, NULL);
if (text)
{
textRect.left += 2;
textRect.right -= 2;
DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, lstrlenW(text), 0, 0, &textRect);
HeapFree(GetProcessHeap(), 0, text);
}
if (hPrevFont) SelectObject(hDC, hPrevFont);
}
static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
{
PB_draw, /* BS_PUSHBUTTON */
PB_draw, /* BS_DEFPUSHBUTTON */
CB_draw, /* BS_CHECKBOX */
CB_draw, /* BS_AUTOCHECKBOX */
CB_draw, /* BS_RADIOBUTTON */
CB_draw, /* BS_3STATE */
CB_draw, /* BS_AUTO3STATE */
GB_draw, /* BS_GROUPBOX */
NULL, /* BS_USERBUTTON */
CB_draw, /* BS_AUTORADIOBUTTON */
NULL, /* Not defined */
NULL, /* BS_OWNERDRAW */
NULL, /* Not defined */
NULL, /* Not defined */
NULL, /* Not defined */
NULL, /* Not defined */
};
static BOOL BUTTON_Paint(HTHEME theme, HWND hwnd, HDC hParamDC)
{
PAINTSTRUCT ps;
HDC hDC;
DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
DWORD dwStyleEx = GetWindowLongW(hwnd, GWL_EXSTYLE);
UINT dtFlags = get_drawtext_flags(dwStyle, dwStyleEx);
ButtonState drawState = IsWindowEnabled(hwnd) ? STATE_NORMAL : STATE_DISABLED;
pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
if (paint)
{
hDC = hParamDC ? hParamDC : BeginPaint(hwnd, &ps);
paint(theme, hwnd, hDC, drawState, dtFlags);
if (!hParamDC) EndPaint(hwnd, &ps);
return TRUE;
}
return FALSE; /* Delegate drawing to the non-themed code. */
}
/**********************************************************************
* The button control subclass window proc.
*/
LRESULT CALLBACK THEMING_ButtonSubclassProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam,
ULONG_PTR dwRefData)
{
const WCHAR* themeClass = WC_BUTTONW;
HTHEME theme;
LRESULT result;
switch (msg)
{
case WM_CREATE:
result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
OpenThemeData(hwnd, themeClass);
return result;
case WM_DESTROY:
theme = GetWindowTheme(hwnd);
CloseThemeData (theme);
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
case WM_THEMECHANGED:
theme = GetWindowTheme(hwnd);
CloseThemeData (theme);
OpenThemeData(hwnd, themeClass);
break;
case WM_SYSCOLORCHANGE:
theme = GetWindowTheme(hwnd);
if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
/* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
* which will do the repaint. */
break;
case WM_PAINT:
theme = GetWindowTheme(hwnd);
if (theme && BUTTON_Paint(theme, hwnd, (HDC)wParam))
return 0;
else
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
case WM_ENABLE:
theme = GetWindowTheme(hwnd);
if (theme) RedrawWindow(hwnd, NULL, NULL,
RDW_FRAME | RDW_INVALIDATE | RDW_UPDATENOW);
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
default:
/* Call old proc */
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
}
return 0;
}