rosapps/smartpdf/baseutils/ms_ui_shguim.h

   1 /*++
   2
   3 Copyright (c) 2003 Microsoft Corporation
   4
   5 Abstract:
   6
   7     Include file for SHGetUIMetric.
   8
   9 --*/
  10
  11 #ifndef __SHGUIM_H__
  12 #define __SHGUIM_H__
  13
  14 #include <windows.h>
  15
  16 //
  17 // Call RegisterWindowMessage on this string if you are interested in knowing
  18 // when the UI metrics have changed.  wParam will be 0, lParam will be one of the
  19 // SHUIMETRICTYPE values to indicate what value has changed.  Call SHGetUIMetrics
  20 // to find out the new value.
  21 //
  22 #define SH_UIMETRIC_CHANGE    TEXT("SH_UIMETRIC_CHANGE")
  23
  24 #if _MSC_VER >= 1400
  25 #include <aygshell.h>
  26 #else
  27
  28 //
  29 // Enumeration of metrics you can ask for.  Note that you will only receive a
  30 // notification for SHUIM_FONTSIZE_POINT when any these three values changes.
  31 //
  32 typedef enum tagSHUIMETRIC
  33 {
  34     SHUIM_INVALID = 0,          // Illegal
  35     SHUIM_FONTSIZE_POINT,       // Application font size (hundredths of a point) -- buffer is pointer to DWORD
  36     SHUIM_FONTSIZE_PIXEL,       // Application font size (in pixels) -- buffer is pointer to DWORD
  37     SHUIM_FONTSIZE_PERCENTAGE,  // Application font size as percentage of normal -- buffer is pointer to DWORD
  38 } SHUIMETRIC;
  39
  40 typedef HRESULT (*PSHGETUIMETRICS)(SHUIMETRIC, PVOID, DWORD, DWORD*);
  41
  42 //////////////////////////////////////////////////////////////////////////////
  43 // FUNCTION: SHGetUIMetrics
  44 //
  45 // PURPOSE: retrieves the shell's UI metrics.  Although this function does not
  46 //     exist in the Pocket PC 2003 SDK, it exists AYGSHELL.DLL in newer
  47 //     versions of the Pocket PC.  This function simply LoadLibrary's AYGSHELL
  48 //     and calls the function if it exists.
  49 //
  50 // ON ENTRY:
  51 //     SHUIMETRIC shuim: the metric to retrieve.
  52 //     PVOID pvBuffer: the retrieved data for the metric.
  53 //     DWORD cbBufferSize: the size of pvBuffer (should be sizeof(DWORD)).
  54 //     DWORD* pcbRequired: retrieves the minimum size of the buffer necessary
  55 //        to get the specified system UI metric.  This can be NULL.
  56 //
  57
  58 __inline HRESULT SHGetUIMetrics(SHUIMETRIC shuim, PVOID pvBuffer, DWORD cbBufferSize, DWORD *pcbRequired)
  59 {
  60     PSHGETUIMETRICS pSHGetUIMetrics = (PSHGETUIMETRICS)GetProcAddress(LoadLibrary(_T("AYGSHELL")), _T("SHGetUIMetrics"));
  61     if (pSHGetUIMetrics)
  62     {
  63         return pSHGetUIMetrics(shuim, pvBuffer, cbBufferSize, pcbRequired);
  64     }
  65     else if (pvBuffer != NULL && cbBufferSize >= sizeof(DWORD))
  66     {
  67         //
  68         // Not supported on this version of Pocket PC, so come up with a reasonable default.
  69         //
  70         LOGFONT lf;
  71         HFONT hFont = (HFONT)GetStockObject(SYSTEM_FONT);
  72         GetObject(hFont, sizeof(lf), &lf);
  73         switch (shuim)
  74         {
  75         case SHUIM_FONTSIZE_POINT:
  76             {
  77                 HDC hDC = GetDC(NULL);
  78                 int nDPI = GetDeviceCaps(hDC, LOGPIXELSY);
  79                 ReleaseDC(NULL, hDC);
  80                 *(DWORD*)pvBuffer = (-lf.lfHeight * 7200) / nDPI;
  81                 break;
  82             }
  83         case SHUIM_FONTSIZE_PIXEL: *(DWORD*)pvBuffer = -lf.lfHeight; break;
  84         case SHUIM_FONTSIZE_PERCENTAGE: *(DWORD*)pvBuffer = 100; break;
  85         }
  86     }
  87     else if (pcbRequired)
  88     {
  89         *pcbRequired = sizeof(DWORD);
  90     }
  91     return S_OK;
  92 }
  93
  94 #endif
  95
  96 #endif