PSI, "pressure sensitive ink", is specially defined for manual signature, and usually works together with a handwriting board or for a touchscreen. PSI contains private coordinates, and a canvas is created in its coordinates. Canvas limits operating area and generates appearance of PSI.
PSI is independent of PDF, and can even be used directly in the device screen. If user wants to save a PSI object to PDF file, please call function . This function will convert PSI data to a PSInk annotation (as a Foxit custom annotation type) and insert the PSInk annotation to the specified position in a PDF page. FSDK.PSInk
◆ AddPoint()
| FSDK.PSI.AddPoint |
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point, |
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type, |
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pressure |
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Add a point.
- Parameters
-
- Returns
- None.
◆ constructor() [1/2]
| FSDK.PSI.constructor |
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bitmap, |
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simulate |
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Constructor, with a bitmap as canvas.
- Parameters
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| [in] | bitmap | A bitmap used as canvas. It should be created with FSDK.Bitmap.e_DIBArgb format. User should ensure this bitmap to keep valid until current PSI object is released. |
| [in] | simulate | Used to decide whether to turn on simulation of PSI or not:
true means to turn on simulation, and false means to turn off simulation.
It can simulate handwriting weights by writing speed when simulation is on. |
◆ constructor() [2/2]
| FSDK.PSI.constructor |
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width, |
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height, |
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simulate |
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Constructor, with specified width and height for canvas.
- Parameters
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| [in] | width | Width of PSI canvas in device coordinate system. This shall be greater than 0. |
| [in] | height | Height of PSI canvas in device coordinate system. This shall be greater than 0. |
| [in] | simulate | Used to decide whether to turn on simulation of PSI or not:
true means to turn on simulation, and false means to turn off simulation.
It can simulate handwriting weights by writing speed when simulation is on. |
◆ ConvertToPDFAnnot()
| FSDK.PSI.ConvertToPDFAnnot |
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page, |
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annot_rect, |
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rotate |
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Convert a PSI object to a PSInk annotation and insert the PSInk annotation to a PDF page.
Actually, this function is to convert the path data of current PSI to a PSInk annotation, ignoring the canvas bitmap.
Before calling this function, user should ensure that current PSI object has contained a valid path (whose last point's type is FSDK.Path.e_TypeLineToCloseFigure. Otherwise, the conversion will be failed and this function will throw exception FSDK.e_ErrInvalidData.
- Parameters
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| [in] | page | A valid PDF page object, to which the PSI is expected to inserted. |
| [in] | annot_rect | A rectangle to specify the position in the PDF page, where the new PSInk annotation will be inserted. It should be valid in PDF coordinate system. |
| [in] | rotate | Rotation value. Currently, it can only be FSDK.e_Rotation0. |
- Returns
- A new PSInk annotation object.
- Note
- User do not need to call function FSDK.Annot.ResetAppearanceStream (inherited from PSInk's parent class) to reset the appearance of PSInk annotation after this conversion.
◆ GetBitmap()
Get the canvas bitmap.
- Returns
- Canvas bitmap.
◆ GetContentsRect()
| FSDK.PSI.GetContentsRect |
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Get contents rectangle.
- Returns
- Contents rectangle, in device coordinate system. If current PSI object does not contain a valid path, a RectF object with all 0 values would be returned.
◆ IsEmpty()
Check whether current object is empty or not.
When the current object is empty, that means current object is useless.
- Returns
- true means current object is empty, while false means not.
◆ SetCallback()
| FSDK.PSI.SetCallback |
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callback | ) |
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Set a callback object for refreshing.
- Parameters
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| [in] | callback | A callback object FSDK.PSICallback which is implemented by user. Please ensure that the callback object keeps valid until the life-cycle of current PSI object ends. |
- Returns
- None.
◆ SetColor()
| FSDK.PSI.SetColor |
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color | ) |
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inline |
Set ink color.
This should be set before adding first point to PSI object. If not set, the default value 0x000000 will be used.
- Parameters
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| [in] | color | Ink color. Format: 0xRRGGBB. |
- Returns
- None.
◆ SetDiameter()
| FSDK.PSI.SetDiameter |
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diameter | ) |
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inline |
Set ink diameter.
This should be set before adding first point to PSI object. If not set, the default value 10 will be used.
- Parameters
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| [in] | diameter | Ink diameter. This should be bigger than 1. |
- Returns
- None.
◆ SetOpacity()
| FSDK.PSI.SetOpacity |
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opacity | ) |
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Set ink opacity.
This should be set before adding first point to PSI object. If not set, the default value 1.0 will be used.
- Parameters
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| [in] | opacity | Ink opacity. Valid range: from 0.0 to 1.0. 0.0 means full transparency and 1.0 means full opaque. |
- Returns
- None.
