ShowGammaAdjustmentDlg method (LEADDlgColor Control)
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Builder Syntax |
int ShowGammaAdjustmentDlg(TWinControl* AOwnerCtrl ); |
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Delphi Syntax |
Function ShowGammaAdjustmentDlg (AOwnerCtrl: TWinControl ): L_INT; |
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Overview |
Refer to Using Imaging Common Dialogs. |
Remarks
Displays the Gamma Adjustment dialog box and gets the options for the gamma correction methods.
The layout and action of the dialog depends on the flags set in the DlgFlags property. Possible options are:
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Value |
Meaning |
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DLG_GAMMAADJUSTMENT_AUTOPROCESS |
[$00000001] Process the image on OK. The LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method. |
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DLG_GAMMAADJUSTMENT_SHOW_CONTEXTHELP |
[$00000002] Dialog should contain a context sensitive help icon. |
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DLG_GAMMAADJUSTMENT_SHOW_PREVIEW |
[$00000004] Show a preview of the image in the dialog. The LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method. |
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DLG_GAMMAADJUSTMENT_SHOW_TOOL_ZOOMLEVEL |
[$00000008] Show the "Zoom to fit" and "Zoom Normal" toolbar buttons. The DLG_GAMMAADJUSTMENT_SHOW_PREVIEW flag must be set in order to show these buttons. |
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DLG_GAMMAADJUSTMENT_FORCELINKCHANNELS |
[$00000010] Force the dialog to apply "Link \all channels" at all times. |
If you include DLG_GAMMAADJUSTMENT_AUTOPROCESS or DLG_GAMMAADJUSTMENT_SHOW_PREVIEW in the DlgFlags property, the LEADImage property must be assigned a Main Control containing a valid bitmap before calling this method.
The following properties are associated with this dialog:
GammaRedValue property
GammaGreenValue property
GammaBlueValue property
GammaAllChannels property
To include a Help button in the dialog, set the ShowHelpButton property to TRUE.
The Gamma Adjustment dialog can be seen below:
See Also