Class VLImageDisplay.TVLImageDisplay

This is a Beta Read Only version of this page. Please review and send recommendations to mitov@mitov.com. We will enable the editing as soon as we are happy with the overall Wiki site.

Package: VideoLabBasicPkg

Unit: VLImageDisplay

Inherits: TVLCommonImageDisplay

Syntax

Delphi:

type TVLImageDisplay = class( TVLCommonImageDisplay )

C++ Builder:

class TVLImageDisplay : public TVLCommonImageDisplay

Visual C++ (MFC):

class CTVLImageDisplay : public CTVLCommonImageDisplay

C# (.NET):

public ref class TVLImageDisplay : Mitov.VideoLab.CommonImageDisplay

Summary

Video display component.

Description

Creates visible image display for representing the frame images.

Use this component to visualize video data.

In Visual C++ you can instantiate the component by using the Open method:

  VCL_InitControls( m_hWnd ); // Call this function once before creating any visual controls!

  CTVLImageDisplay ImageDisplay;
  ImageDisplay.Open( m_ImageDisplay.m_hWnd );

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