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Displays the Contrast dialog box, and gets the options for LBitmap::ChangeContrast
#include "ltwrappr.h"
virtual L_INT LDialogColor::DoModalContrast(hWndOwner)
Handle of the window which owns the dialog.
| Value | Meaning |
|---|---|
| SUCCESS_DLG_OK | The "OK" button was pressed, and the dialog exited successfully. |
| SUCCESS_DLG_CANCEL | The "Cancel" button was pressed, and the dialog exited successfully. |
| < 1 | An error occurred. Refer to Return Codes. |
LDialogColor::SetContrastParams must be called before using this function to set the initial values for the dialog. You can get the updated CONTRASTDLGPARAMS with the values entered by the user through the dialog by using LDialogColor::GetContrastParams.
L_INT LDialogColor_DoModalContrastExample(LBitmap * pBitmap, HWND hWnd){L_INT nRet;LDialogColor DlgColor;nRet = DlgColor.Initialize (DLG_INIT_COLOR );if(nRet != SUCCESS)return nRet;DlgColor.SetBitmap(pBitmap);CONTRASTDLGPARAMS DlgParams;memset ( &DlgParams, 0, sizeof ( CONTRASTDLGPARAMS ) ) ;DlgParams.uStructSize = sizeof ( CONTRASTDLGPARAMS ) ;DlgColor.EnableCallBack (FALSE);DlgColor.EnablePreview(TRUE);DlgColor.EnableAutoProcess(TRUE);DlgColor.EnableToolbar(TRUE);nRet = DlgColor.SetContrastParams(&DlgParams) ;if(nRet != SUCCESS)return nRet;nRet = DlgColor.DoModalContrast(hWnd);if(nRet < 1)return nRet;// Gets the updated values for the structurenRet = DlgColor.GetContrastParams(&DlgParams, sizeof(DlgParams)) ;if(nRet != SUCCESS)return nRet;nRet = DlgColor.Free();if(nRet != SUCCESS)return nRet;return nRet;}