Class VLImageDisplay.TVLExternalImageDisplayElement

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Package: VideoLabBasicPkg

Unit: VLImageDisplay

Inherits: TVLBasicImageDisplayElement

Contents 1 Syntax 1.1 Delphi: 1.2 C++ Builder: 1.3 Visual C++ (MFC): 1.4 C# (.NET): 2 Summary 3 Description 4 Methods 4.1 Public 5 From TVLBasicImageDisplayElement 6 Properties 6.1 Published 7 Methods 7.1 Public 8 From TVLImageDisplay 9 Properties 9.1 Published 10 Methods 10.1 Public 11 From TVLCommonImageDisplay 12 Properties 12.1 Published 13 Methods 13.1 Public 14 Pins 15 From TVLCommonDisplay 16 Properties 16.1 Published 16.2 Public 17 Methods 17.1 Public 18 Events 19 From TSLCustomControlItem 20 Properties 20.1 Public 21 Methods 21.1 Public

Syntax

Delphi:

type TVLExternalImageDisplayElement = class( TVLBasicImageDisplayElement, ILPDrawComponentElement )

C++ Builder:

class TVLExternalImageDisplayElement : public TVLBasicImageDisplayElement

Visual C++ (MFC):

class CTVLExternalImageDisplayElement : public CTVLBasicImageDisplayElement

C# (.NET):

public ref class ExternalImageDisplayElement : Mitov.VideoLab.BasicImageDisplayElement

Summary

Component element drawing video.

Description

Add this component element to draw video inside a component.

Diagram:

Example:

Methods

Public

• procedure Draw(AGraphics : IGPGraphics; AContoursOnly : Boolean; ARadiusX : Single; ARadiusY : Single; Width : Single; Height : Single; AXCoeff : Single; AYCoeff : Single)

From TVLBasicImageDisplayElement

Properties

Published

• Position - Specifies the position of the component element.
• Size - Specifies the size of the component element.

Methods

Public

• procedure Invalidate()
• procedure InvalidateSize()

From TVLImageDisplay

Properties

Published

• RenderMode - Specifies the desired rendering mode.

Methods

Public

• procedure DrawTo(AGraphics : IGPGraphics; AContoursOnly : Boolean; AWidth : Single; AHeight : Single)
• procedure Clear() - Clears the Display.
• procedure Invalidate()

From TVLCommonImageDisplay

Properties

Published

• AutoClear - Auto clear the display at the end of the video.
• AspectRatio - Specifies the desired aspect ration for the display.
• TabStop

Methods

Public

• procedure Clear() - Clears the display.
• procedure DisplayBitmap(ABitmap : TBitmap) - Displays the content of a bitmap.
• procedure DisplayBitmap(ABitmap : TVLBitmap) - Displays the content of a bitmap.
• procedure DisplayImage(AImage : IVLImageBuffer) - Displays the content of an image buffer.

Pins

• InputPin - The Video Input Pin of the display.
• UserControlOutputPin - User control source pin.

From TVLCommonDisplay

Properties

Published

• AutoSize - Auto-size to display to the video size.
• Center - Center the image in the display.
• Stretch - Stretch the image to the display size.
• StretchMax - Stretches the image to fill completely the frame, while preserving the aspect ration.
• Proportional - Keep the image proportional(Preserve aspect ratio).
• Color

Public

• ImageHeight - Returns the Height of the image in the display.
• ImageWidth - Returns the Width of the image in the display.
• ImageTop - Returns the Top position of the image in the display.
• ImageLeft - Returns the Left position of the image in the display.

Methods

Public

• procedure SetParent(AParent : TWinControl)
• function ScreenToImage(AValue : TPoint) : TPoint - Converts from screen coordinates into video frame coordinates.

Events

• OnMouseMove
• OnMouseDown
• OnMouseUp
• OnClick
• OnDblClick

From TSLCustomControlItem

Properties

Public

• Index
• ComponentList

Methods

Public

• function GetParentComponent() : TComponent
• function HasParent() : Boolean
• procedure SetParent(AParent : TWinControl)
• function GetHasEnable() : Boolean
• function GetCanDisable() : Boolean
• procedure SetParentComponent(AValue : TComponent)