TJamThumbnailImage Class

The TJamThumbnailImage component allows you to show a thumbnail preview of a file or folder.

Class Hierarchy

Syntax

Pascal

TJamThumbnailImage = class(TCustomJamImageFromImageList, IJamShellControl, IThumbnailViewer);

File

JAMControls

Remarks

Use this component to display a thumbnail image of a file or folder. The same thumbnail image that the Windows Explorer uses will be shown. The Windows Shell does not supply a thumbnail image for all objects.

You may either set the Path property to set a path to a file or folder for which the thumbnail image should be displayed. Or you may synchronize it to a TJamShellList or TJamShellTree component using the ShellLink property.

See Also

GetThumbnailExample

TShellBrowser.SetThumbnailProvider

TShellBrowser.GetThumbNailBitmap

TShellBrowser.GetThumbNailImage

TJamShellList.Thumbnails

TJamFileList.Thumbnails

TJamSystemShellView.Thumbnails

Public Methods

TCustomJamImageFromImageList Class

	Name	Description
	Create	Creates an instance of a TCustomJamImageFromImageList component

TJamThumbnailImage Class

	Name	Description
	Create	Creates an instance of a TJamThumbnailImage component
	Destroy	Destroys an instance of a TJamThumbnailImage component

public

	Name	Description
	ShellLink	The TJamShellLink instance to which the current control connected.
	FileChanged	This method is called by the ShellLink instance if the currently selected item has changed.
	FullRefresh	This method indicates that the callee should perform a full refresh of its contents. This will usually be an entrie reload of the displyed items.
	getShellLink	Setter method for the ShellLink property.
	GoUp	This method indicates that the callee should go up one level and siplay the contents of the current folder's parent folder.
	PathChanged	This method is called by the ShellLink instance if the currently displayed folder has changed.
	SelectAll	This method indicates that the callee should select all item it currently displays.
	setShellLink	Getter method for the ShellLink property.
	SmartRefresh	This method indicates that the callee should perform a quick refresh of its contents. It is tolerable that changes in metadata are not detected. Removed and deleted items hsould be detected. The runtime of this method should be significantly faster thatn the one of the FullRefresh method.

IThumbnailViewer Interface

	Name	Description
	SetThumbnailBitmap	This is SetThumbnailBitmap, a member of class IThumbnailViewer.

TJamThumbnailImage Class

	Name	Description
	Picture	Use this property to access the thumbnail image.
	Clear
	FullRefresh	Reloads the thumbnail image.

published

TCustomJamImageFromImageList Class

	Name	Description
	Align	See TCustomPanel.Align
	Anchors	See TCustomPanel.Anchors
	BevelInner	See TCustomPanel.BevelInner
	BevelOuter	See TCustomPanel.BevelOuter
	BorderStyle	See TCustomPanel.BorderStyle
	BorderWidth	See TCustomPanel.BorderWidth
	Color	See TCustomPanel.Color
	ParentColor	See TCustomPanel.ParentColor

TJamThumbnailImage Class

	Name	Description
	AutoSize	Specifies whether the control sizes itself automatically to accommodate its contents.
	BevelInner	Specifies the cut of the inner bevel.
	BevelOuter	Specifies the cut of the outer bevel.
	BevelWidth	This is BevelWidth, a member of class TJamThumbnailImage.
	BorderStyle	Determines whether the list view displays a single line border.
	BorderWidth	See TCustomPanel.BorderWidth
	Color	Specifies the background color of the control.
	Constraints	This is Constraints, a member of class TJamThumbnailImage.
	DoubleBuffered	Determines whether the control's image is rendered directly to the window or painted to an in-memory bitmap first.
	DragCursor	This is DragCursor, a member of class TJamThumbnailImage.
	DragKind	This is DragKind, a member of class TJamThumbnailImage.
	DragMode	This is DragMode, a member of class TJamThumbnailImage.
	Enabled	Enables or disables the thumbnail image.
	IconInstead	Decides if an icon should be shown if there is no thumbnail.
	OnCanResize	This is OnCanResize, a member of class TJamThumbnailImage.
	OnClick	Occurs when the user clicks the control.
	OnContextPopup	This is OnContextPopup, a member of class TJamThumbnailImage.
	OnDblClick	Occurs when the user double-clicks the left mouse button when the mouse pointer is over the control.
	OnDragDrop	This is OnDragDrop, a member of class TJamThumbnailImage.
	OnDragOver	This is OnDragOver, a member of class TJamThumbnailImage.
	OnEndDock	This is OnEndDock, a member of class TJamThumbnailImage.
	OnEndDrag	This is OnEndDrag, a member of class TJamThumbnailImage.
	OnMouseDown	This is OnMouseDown, a member of class TJamThumbnailImage.
	OnMouseMove	This is OnMouseMove, a member of class TJamThumbnailImage.
	OnMouseUp	This is OnMouseUp, a member of class TJamThumbnailImage.
	OnProgress	Occurs periodically during slow operations that affect the image.
	OnStartDock	This is OnStartDock, a member of class TJamThumbnailImage.
	OnStartDrag	This is OnStartDrag, a member of class TJamThumbnailImage.
	ParentColor	See TCustomPanel.ParentColor
	ParentDoubleBuffered	This is ParentDoubleBuffered, a member of class TJamThumbnailImage.
	ParentShowHint	This is ParentShowHint, a member of class TJamThumbnailImage.
	Path	Set the path of the object that should be displayed as thumbnail.
	PopupMenu	This is PopupMenu, a member of class TJamThumbnailImage.
	ShellLink	Connects this component to a TJamShellLink in order to synchronize it to other shell controls.
	ShowErrorMessages	Allow Windows error messages.
	ShowHint	This is ShowHint, a member of class TJamThumbnailImage.
	Version	The version number of the ShellBrower controls.
	Visible	Determines whether the component appears onscreen.

Links

Members, public, published

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