uxtheme.h

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//---------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// File   : uxtheme.h
// Version: 1.0
//---------------------------------------------------------------------------
#ifndef _UXTHEME_H_
#define _UXTHEME_H_

#ifdef __BORLANDC__
#pragma option push -b -a8 -pc -A- /*P_O_Push*/
#endif

//---------------------------------------------------------------------------
#include <commctrl.h>
//---------------------------------------------------------------------------
//#if (_WIN32_WINNT >= 0x0500)     // only available on XP
//---------------------------------------------------------------------------
// Define API decoration for direct importing of DLL references.
#ifndef THEMEAPI
#if !defined(_UXTHEME_)
#define THEMEAPI          EXTERN_C DECLSPEC_IMPORT HRESULT STDAPICALLTYPE
#define THEMEAPI_(type)   EXTERN_C DECLSPEC_IMPORT type STDAPICALLTYPE
#else
#define THEMEAPI          STDAPI
#define THEMEAPI_(type)   STDAPI_(type)
#endif
#endif // THEMEAPI
//---------------------------------------------------------------------------
typedef HANDLE HTHEME;          // handle to a section of theme data for class

//---------------------------------------------------------------------------
// NOTE: PartId's and StateId's used in the theme API are defined in the 
//       hdr file <tmschema.h> using the TM_PART and TM_STATE macros.  For
//       example, "TM_PART(BP, PUSHBUTTON)" defines the PartId "BP_PUSHBUTTON".

//---------------------------------------------------------------------------
//  OpenThemeData()     - Open the theme data for the specified HWND and 
//                        semi-colon separated list of class names. 
// 
//                        OpenThemeData() will try each class name, one at 
//                        a time, and use the first matching theme info
//                        found.  If a match is found, a theme handle
//                        to the data is returned.  If no match is found,
//                        a "NULL" handle is returned. 
//
//                        When the window is destroyed or a WM_THEMECHANGED
//                        msg is received, "CloseThemeData()" should be 
//                        called to close the theme handle.
//
//  hwnd                - window handle of the control/window to be themed
//
//  pszClassList        - class name (or list of names) to match to theme data
//                        section.  if the list contains more than one name, 
//                        the names are tested one at a time for a match.  
//                        If a match is found, OpenThemeData() returns a 
//                        theme handle associated with the matching class. 
//                        This param is a list (instead of just a single 
//                        class name) to provide the class an opportunity 
//                        to get the "best" match between the class and 
//                        the current theme.  For example, a button might
//                        pass L"OkButton, Button" if its ID=ID_OK.  If 
//                        the current theme has an entry for OkButton, 
//                        that will be used.  Otherwise, we fall back on 
//                        the normal Button entry.
//---------------------------------------------------------------------------
THEMEAPI_(HTHEME) OpenThemeData(HWND hwnd, LPCWSTR pszClassList);

//---------------------------------------------------------------------------
//  CloseTHemeData()    - closes the theme data handle.  This should be done 
//                        when the window being themed is destroyed or
//                        whenever a WM_THEMECHANGED msg is received 
//                        (followed by an attempt to create a new Theme data 
//                        handle).
//
//  hTheme              - open theme data handle (returned from prior call
//                        to OpenThemeData() API).
//---------------------------------------------------------------------------
THEMEAPI CloseThemeData(HTHEME hTheme);

//---------------------------------------------------------------------------
//    functions for basic drawing support 
//---------------------------------------------------------------------------
// The following methods are the theme-aware drawing services.
// Controls/Windows are defined in drawable "parts" by their author: a 
// parent part and 0 or more child parts.  Each of the parts can be 
// described in "states" (ex: disabled, hot, pressed).  
//---------------------------------------------------------------------------
// For the list of all themed classes and the definition of all
// parts and states, see the file "tmschmea.h".
//---------------------------------------------------------------------------
// Each of the below methods takes a "iPartId" param to specify the 
// part and a "iStateId" to specify the state of the part.  
// "iStateId=0" refers to the root part.  "iPartId" = "0" refers to 
// the root class.  
//-----------------------------------------------------------------------
// Note: draw operations are always scaled to fit (and not to exceed)  
// the specified "Rect".
//-----------------------------------------------------------------------

//------------------------------------------------------------------------
//  DrawThemeBackground()   
//                      - draws the theme-specified border and fill for 
//                        the "iPartId" and "iStateId".  This could be 
//                        based on a bitmap file, a border and fill, or 
//                        other image description.  
//
//  hTheme              - theme data handle
//  hdc                 - HDC to draw into
//  iPartId             - part number to draw
//  iStateId            - state number (of the part) to draw
//  pRect               - defines the size/location of the part
//  pClipRect           - optional clipping rect (don't draw outside it)
//------------------------------------------------------------------------
THEMEAPI DrawThemeBackground(HTHEME hTheme, HDC hdc, 
    int iPartId, int iStateId, const RECT *pRect, OPTIONAL const RECT *pClipRect);

//---------------------------------------------------------------------------
//----- DrawThemeText() flags ----

#define DTT_GRAYED      0x1         // draw a grayed-out string  

//-------------------------------------------------------------------------
//  DrawThemeText()     - draws the text using the theme-specified 
//                        color and font for the "iPartId" and 
//                        "iStateId".  
//
//  hTheme              - theme data handle
//  hdc                 - HDC to draw into
//  iPartId             - part number to draw
//  iStateId            - state number (of the part) to draw
//  pszText             - actual text to draw
//  dwCharCount         - number of chars to draw (-1 for all)
//  dwTextFlags         - same as DrawText() "uFormat" param
//  dwTextFlags2        - additional drawing options 
//  pRect               - defines the size/location of the part
//-------------------------------------------------------------------------
THEMEAPI DrawThemeText(HTHEME hTheme, HDC hdc, int iPartId, 
    int iStateId, LPCWSTR pszText, int iCharCount, DWORD dwTextFlags, 
    DWORD dwTextFlags2, const RECT *pRect);

//-------------------------------------------------------------------------
//  GetThemeBackgroundContentRect()
//                      - gets the size of the content for the theme-defined 
//                        background.  This is usually the area inside
//                        the borders or Margins.  
//
//      hTheme          - theme data handle
//      hdc             - (optional) device content to be used for drawing
//      iPartId         - part number to draw
//      iStateId        - state number (of the part) to draw
//      pBoundingRect   - the outer RECT of the part being drawn
//      pContentRect    - RECT to receive the content area
//-------------------------------------------------------------------------
THEMEAPI GetThemeBackgroundContentRect(HTHEME hTheme, OPTIONAL HDC hdc, 
    int iPartId, int iStateId,  const RECT *pBoundingRect, 
    OUT RECT *pContentRect);

//-------------------------------------------------------------------------
//  GetThemeBackgroundExtent() - calculates the size/location of the theme-
//                               specified background based on the 
//                               "pContentRect".
//
//      hTheme          - theme data handle
//      hdc             - (optional) device content to be used for drawing
//      iPartId         - part number to draw
//      iStateId        - state number (of the part) to draw
//      pContentRect    - RECT that defines the content area
//      pBoundingRect   - RECT to receive the overall size/location of part
//-------------------------------------------------------------------------
THEMEAPI GetThemeBackgroundExtent(HTHEME hTheme, OPTIONAL HDC hdc,
    int iPartId, int iStateId, const RECT *pContentRect, 
    OUT RECT *pExtentRect);

//-------------------------------------------------------------------------
typedef enum tag_THEMESIZE
{
    TS_MIN,             // minimum size
    TS_TRUE,            // size without stretching
    TS_DRAW,            // size that theme mgr will use to draw part
} THEMESIZE;
//-------------------------------------------------------------------------
//  GetThemePartSize() - returns the specified size of the theme part
//
//  hTheme              - theme data handle
//  hdc                 - HDC to select font into & measure against
//  iPartId             - part number to retrieve size for
//  iStateId            - state number (of the part) 
//  prc                 - (optional) rect for part drawing destination
//  eSize               - the type of size to be retreived
//  psz                 - receives the specified size of the part 
//-------------------------------------------------------------------------
THEMEAPI GetThemePartSize(HTHEME hTheme, HDC hdc, int iPartId, int iStateId, 
    OPTIONAL RECT *prc, enum tag_THEMESIZE eSize, OUT SIZE *psz);

//-------------------------------------------------------------------------
//  GetThemeTextExtent() - calculates the size/location of the specified 
//                         text when rendered in the Theme Font. 
//
//  hTheme              - theme data handle
//  hdc                 - HDC to select font & measure into
//  iPartId             - part number to draw
//  iStateId            - state number (of the part) 
//  pszText             - the text to be measured
//  dwCharCount         - number of chars to draw (-1 for all)
//  dwTextFlags         - same as DrawText() "uFormat" param
//  pszBoundingRect     - optional: to control layout of text
//  pszExtentRect       - receives the RECT for text size/location
//-------------------------------------------------------------------------
THEMEAPI GetThemeTextExtent(HTHEME hTheme, HDC hdc, 
    int iPartId, int iStateId, LPCWSTR pszText, int iCharCount, 
    DWORD dwTextFlags, OPTIONAL const RECT *pBoundingRect, 
    OUT RECT *pExtentRect);

//-------------------------------------------------------------------------
//  GetThemeTextMetrics()
//                      - returns info about the theme-specified font
//                        for the part/state passed in.
//
//  hTheme              - theme data handle
//  hdc                 - optional: HDC for screen context
//  iPartId             - part number to draw
//  iStateId            - state number (of the part) 
//  ptm                 - receives the font info
//-------------------------------------------------------------------------
THEMEAPI GetThemeTextMetrics(HTHEME hTheme, OPTIONAL HDC hdc, 
    int iPartId, int iStateId, OUT TEXTMETRIC* ptm);

//-------------------------------------------------------------------------
//  GetThemeBackgroundRegion()
//                      - computes the region for a regular or partially 
//                        transparent theme-specified background that is 
//                        bound by the specified "pRect".
//                        If the rectangle is empty, sets the HRGN to NULL