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typedef struct _WINDOWLEVELDLGPARAMS{L_UINT uStructSize ;pBITMAPHANDLE pBitmap ;L_BOOL bZoomToFit;L_RGBQUAD * pLUT ;L_UINT32 uLUTLength ;L_UINT uLowBit ;L_UINT uHighBit ;L_INT nLow ;L_INT nHigh ;COLORREF crStart ;COLORREF crEnd ;L_INT nFactor ;L_UINT32 uWindowLevelFlags;L_UINT32 uDlgFlags ;LTCOMMDLGHELPCB pfnHelpCallback ;L_VOID *pHelpCallBackUserData ;} WINDOWLEVELDLGPARAMS, * LPWINDOWLEVELDLGPARAMS;
The WINDOWLEVELDLGPARAMS structure provides information needed to the LDialogColor::DoModalWindowLevel function.
| Member | Description | |
| uStructSize | Size of this structure, in bytes. Use the sizeof operator to calculate this value. | |
| pBitmap | Ignored. | |
| bZoomToFit | Flag that indicates the initial zoom level for previewing the image. Possible values are: | |
| Value | Meaning | |
| TRUE | Set the initial zoom level to "Zoom to fit". | |
| FALSE | Set the initial zoom level to "Normal (1:1)". | |
| pLUT | Pointer to the look-up table, which will be filled by the dialog. | |
| uLUTLength | Length of the look-up table. | |
| uLowBit | Value indicating the low bit used for leveling. | |
| uHighBit | Value indicating the high bit used for leveling. | |
| nLow | Variable to be updated with the low value entered through the dialog. | |
| nHigh | Variable to be updated with the high value entered through the dialog. | |
| crStart | Variable to be updated with the starting color value entered through the dialog. | |
| crEnd | Variable to be updated with the ending color value entered through the dialog. | |
| nFactor | Value that indicates the factor to be applied in the function operation specified in the uWindowLevelFlags parameter. This parameter is used only if uWindowLevelFlags is FILLLUT_EXPONENTIAL, FILLLUT_LOGARITHMIC or FILLLUT_SIGMOID. If FILLLUT_EXPONENTIAL or FILLLUT_SIGMOID flag is selected its value range from 1000 to -1000. If FILLLUT_LOGARITHMIC flag is selected its value range form 0 to 1000. If nFactor = 0, the lookup table will be filled linearly. | |
| uWindowLevelFlags | Flags that indicate how the range is used to fill the LUT and the type of LUT. | |
| The following flags indicate how the range is used to fill the LUT: | ||
| Value | Meaning | |
| FILLLUT_INSIDE | [0x0001] Fill the LUT between nLow and nHigh. ( inside the nLow...nHigh range ) | |
| FILLLUT_OUTSIDE | [0x0002] Fill the LUT below nLow and above nHigh. ( outside the nLow...nHigh range ) | |
| The following flags indicate the LUT type: | ||
| Value | Meaning | |
| FILLLUT_LINEAR | [0x0010] LUT is linear. | |
| FILLLUT_EXPONENTIAL | [0x0020] LUT is exponential. | |
| FILLLUT_LOGARITHMIC | [0x0030] LUT is logarithmic. | |
| FILLLUT_SIGMOID | [0x0040] LUT is sigmoid. | |
| uDlgFlags | User interface flags for this dialog which determines the layout and action of the dialog. Possible values are: | |
| Value | Meaning | |
| DLG_WINDOWLEVEL_AUTOPROCESS | [0x00000001] process the image on OK. You should pass a valid bitmap in the pBitmap field of this structure. | |
| DLG_WINDOWLEVEL_SHOW_CONTEXTHELP | [0x00000002] dialog should contain context sensitive help icon. | |
| DLG_WINDOWLEVEL_SHOW_PREVIEW | [0x00000004] show preview of the image in the dialog. You should pass a valid bitmap in the pBitmap field of this structure. | |
| DLG_WINDOWLEVEL_SHOW_TOOL_ZOOMLEVEL | [0x00000008] show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_HUE_SHOW_PREVIEW flag must be set in order to show these buttons. | |
| DLG_WINDOWLEVEL_SHOW_RANGE | [0x00000010] show the Range combo in the dialog. | |
| pfnHelpCallback | Ignored. | |
| pHelpCallBackUserData | Ignored. | |