Class VLImageDisplay.TVLImageDisplayLayer

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Package: VideoLabBasicPkg

Unit: VLImageDisplay

Inherits: TVLImageDisplay

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 TVLImageDisplay 6 Methods 6.1 Public 7 From TVLCommonImageDisplay 8 Properties 8.1 Published 9 Methods 9.1 Public 10 Pins 11 From TVLCommonDisplay 12 Properties 12.1 Published 12.2 Public 13 Methods 13.1 Public 14 Events 15 From TSLCustomControlItem 16 Properties 16.1 Public 17 Methods 17.1 Public 18 From TLPCustomControl 19 Properties 19.1 Published 20 Methods 20.1 Public 21 Events

Syntax

Delphi:

type TVLImageDisplayLayer = class( TVLImageDisplay, ILPDrawItem )

C++ Builder:

class TVLImageDisplayLayer : public TVLImageDisplay

Visual C++ (MFC):

class CTVLImageDisplayLayer : public CTVLImageDisplay

C# (.NET):

public ref class TVLImageDisplayLayer : Mitov.VideoLab.ImageDisplay

Summary

Layer drawing video.

Description

Add this layer to draw video over the frames.

Example:

Methods

Public

• procedure DoLayerBegin(ACanvas : TLPCanvas; AWidth : Integer; AHeight : Integer; AXCoeff : Single; AYCoeff : Single)
• procedure DoLayerEnd()
• procedure DoLayerDraw(ACanvas : TLPCanvas; AWidth : Integer; AHeight : Integer; AXCoeff : Single; AYCoeff : Single; AContoursOnly : Boolean)
• procedure DoLayerMouseMove(AShift : TShiftState; AX : Integer; AY : Integer)
• procedure DoLayerMouseDown(Button : TMouseButton; Shift : TShiftState; X : Integer; Y : Integer)
• procedure DoLayerMouseUp(Button : TMouseButton; Shift : TShiftState; X : Integer; Y : Integer)
• procedure DoLayerMouseWheelDown(AShift : TShiftState; AX : Integer; AY : Integer)
• procedure DoLayerMouseWheelUp(AShift : TShiftState; AX : Integer; AY : Integer)
• procedure DoLayerMouseEnter()
• procedure DoLayerMouseLeave()
• procedure SetChachedData(ALink : TObject; AData : TObject)
• procedure AddLayerLink(ALink : TLPLayerCollectionItem)
• procedure RemoveLayerLink(ALink : TLPLayerCollectionItem)
• procedure SetBounds(ALeft : Integer; ATop : Integer; AWidth : Integer; AHeight : Integer)

From TVLImageDisplay

Methods

Public

• 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.
• 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

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

From TLPCustomControl

Properties

Published

• Visible

Methods

Public

• procedure InvalidateIntRect(ARect : TRect)

Events

• OnMouseEnter
• OnMouseLeave