L_AnnGetFillModeExt
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_AnnGetFillModeExt(hObject, puFillMode, pnAlpha)
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HANNOBJECT hObject; |
/* handle to the annotation object */ |
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/* pointer to a variable to be updated with the fill mode */ | |
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/* pointer to a variable to be updated with the alpha value */ |
Gets the fill mode and alpha of the specified annotation object. This function is available in the Document/Medical Toolkits.
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Parameter |
Description |
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hObject |
Handle to the annotation object. |
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puFillMode |
Pointer to a variable to be updated with the object's fill mode constant. Possible fill mode values are: |
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Value |
Meaning |
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ANNMODE_TRANSPARENT |
[0] Transparent. |
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ANNMODE_TRANSLUCENT |
[1] Translucent. |
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ANNMODE_OPAQUE |
[2] Opaque. |
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ANNMODE_ALPHA |
[3] Alpha. |
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pnAlpha |
Pointer to a variable to be updated with the object’s alpha value. This is only valid if the fill mode puFillMode is updated with is ANNMODE_ALPHA. Possible values range from 0 – 255 where: |
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Value |
Meaning |
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0 |
Transparent background |
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255 |
Opaque background. |
Returns
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SUCCESS |
The function was successful. |
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< 1 |
An error occurred. Refer to Return Codes. |
Comments
Like L_AnnGetFillMode, you can use this function to get the fill mode settings for annotation objects. This function extends the L_AnnGetFillMode function to support the new fill mode ANNMODE_ALPHA.
Before calling L_AnnGetFillModeExt enable alpha background filling. You can enable alpha background filling by using the following code snippet:
L_VOID ExampleEnableOption(HANNOBJECT hAutomation)
{
L_UINT uOptions = 0;
L_AnnGetOptions( hAutomation);
L_AnnSetOptions( hAutomation, uOptions | OPTIONS_NEW_ALPHA);
}
The following figure displays rectangle annotation objects using different alpha values:
Before calling this function, you must declare a variable of data type L_UINT. Then, pass the address of the variable in the puFillMode parameter. This function will update the variable with the annotation object's fill mode constant. If the returned fill mode is ANNMODE_ALPHA, then there is also a corresponding alpha value (0..255). To get the alpha value, declare a variable of type L_INT and pass the address for the puAlpha value. If you do not want the alpha value, pass NULL for the puAlpha value. Note that if the returned fill mode is anything other than ANNMODE_ALPHA, then there is no corresponding alpha value.
The ANNMODE_ALPHA parameter allows you to declare the amount of transparency of the annotation background. The alpha value can be between 0 (completely transparent) and 255 (completely opaque) inclusive.
To see the possible fill modes and patterns, refer to Illustration of Fill Options for Annotations.
Note that the L_AnnSetROP2 function and the L_AnnSetFillModeExt function affect each other. If you set uFillMode to ANNFILLMODE_OPAQUE, then uROP2 cannot be ANNROP2_AND. If you set uFillMode to ANNFILLMODE_TRANSLUCENT, then uROP2 has to be ANNROP2_AND. If you set uFillMode to ANNFILLMODE_TRANSPARENT, uROP2 can be anything.
Required DLLs and Libraries
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LTANN For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application. |
Platforms
Windows 95 / 98 / Me, Windows 2000 / XP.
See Also
Example
For an example, refer to L_AnnSetFillModeExt.