ExtCtrls unit

Contains extra controls commonly used in Lazarus forms.

extctrls.pp contains extra controls commonly used in Lazarus Component Library ( LCL) applications. It adds components to the following tabs in the Lazarus IDE Component Palette:

Standard Tab

TRadioGroup
TCheckGroup
TPanel

Additional Tab

TImage
TShape
TBevel
TPaintBox
TNotebook
TLabeledEdit
TSplitter
TTrayIcon
TControlBar
TFlowPanel

System Tab

TTimer
TIdleTimer

The following are registered but not displayed:

TPage

Classes and records

`TBevel`	class	A bevel placed around the edge of buttons and other components.
`TBoundLabel`	class	Implements a label bound to another control.
`TCheckGroup`	class	TCheckGroup is a group of Check Boxes physically and logically grouped together on a form.
`TControlBar`	class	Implements a panel used to maintain and manage tool bars and tool buttons.
`TCtrlBand`	class	Represents a band and control displayed by TControlBar.
`TCtrlBands`	class	Container used to store TCtrlBand instances.
`TCustomCheckGroup`	class	TCustomCheckGroup is the base type for TCheckGroup.
`TCustomControlBar`	class	Implements a panel used to maintain and manage tool bars and tool buttons on a form.
`TCustomFlowPanel`	class	The base class for TFlowPanel.
`TCustomIdleTimer`	class	Implements the base class for TIdleTimer.
`TCustomImage`	class	Implements the base class for TImage.
`TCustomLabeledEdit`	class	Defines an edit control with a label bound to the control.
`TCustomPanel`	class	The base class for a general container which can hold other objects. It has a customizable border and a central text.
`TCustomRadioGroup`	class	TCustomRadioGroup is the base type for TRadioGroup.
`TCustomShape`	class	Defines a shaped control with an arbitrary geometric shape.
`TCustomSplitter`	class	TCustomSplitter is the base type for TSplitter.
`TCustomTrayIcon`	class	Defines the base class for a multi-platform system tray icon component.
`TFlowPanel`	class	Implements a panel with flowed layout for its controls.
`TFlowPanelControl`	class	Implements a collection item for the TFlowPanelControlList collection.
`TFlowPanelControlList`	class	Implements a collection for TCustomFlowPanel collection items.
`TIdleTimer`	class	Implements a timer to measure idle time between processes.
`TImage`	class	Implements a graphic image placed on a form, and usually loaded from a picture file.
`TLabeledEdit`	class	Implements an edit control with a label bound to the control.
`TNotebook`	class	TNotebook is a container for a group of related pages.
`TPage`	class	TPage: One of the pages in a tabbed Notebook.
`TPaintBox`	class	Implements a control with a rectangular drawing area using a given Font and Color.
`TPanel`	class	Implements a general purpose container which can hold other components.
`TRadioGroup`	class	TRadioGroup is a group of related but mutually exclusive radio buttons, requiring the user to select one of a set of alternatives.
`TShape`	class	Implements a shaped control with an arbitrary geometric shape.
`TSplitter`	class	TSplitter is a vertical or horizontal bar placed on a panel or form to separate sub-panels functionally.
`TTimer`	class	TTimer is an elapsed timer useful in many applications.
`TTrayIcon`	class	Implements a multi-platform system tray component.
`TUNBPages`	class	Represents page names and page class instances for a notebook.

Procedures and functions

`Frame3D`	procedure	Provides a wrapper for the Frame3D method in TCanvas.
`Register`	procedure	Registers components for use in the Lazarus IDE.

Types

`TBalloonFlags`	enumeration	TBalloonFlags enumerated type for flags used in Tray Icon balloons.
`TBandDragEvent`	procedure type	Specifies an event handler signalled when a control on a band is dragged.
`TBandDrawingStyle`	enumeration	Represents the drawing styles available for tool bar bands.
`TBandInfoEvent`	procedure type	Specifies an event handler used to get layout and positioning information for a control on a band in TControlBar.
`TBandMove`	enumeration	Represents band move states in TCtrlBand.
`TBandMoveEvent`	procedure type	Specifies an event handler signalled when a control band is moved.
`TBandPaintEvent`	procedure type	Specifies an event handler used to perform actions needed when a band in TCustomControlBar is painted.
`TBandPaintOption`	enumeration	Represents the paint options enabled when drawing a TControlBar.
`TBandPaintOptions`	set	Set type used to store values from the TBandPaintOption enumeration.
`TBeforeShowPageEvent`	procedure type	Specifies an event handler triggered before a page in displayed.
`TBevelShape`	enumeration	TBevelShape is an enumerated type for shapes used in a bevel.
`TBevelStyle`	enumeration	TBevelStyle is an enumerated type with bevel style values: lowered or raised.
`TBevelWidth`	type	Defines the range of values allowed in a bevel width.
`TCanOffsetEvent`	procedure type	Specifies an event handler signalled to determine if the given offset is valid for a splitter control.
`TCanResizeEvent`	procedure type	TCanResizeEvent - generic event handling method for resizing using splitter.
`TCheckGroupClicked`	procedure type	TCheckGroupClicked specifies a generic event handler method for a click in a check group.
`TColumnLayout`	enumeration	TColumnLayout is an enumerated type which determines the layout direction used to arranged data in columns.
`TCursorDesign`	enumeration	Represents cursor shapes displayed when the mouse hovers over different areas in a control band.
`TFlowStyle`	enumeration	Represents the flow styles used in TCustomFlowPanel.
`TIdleTimerAutoEvent`	enumeration	TIdleTimerAutoEvent is an enumerated type containing the events relevant to a timer.
`TIdleTimerAutoEvents`	set	TIdleTimerAutoEvents is set type used to store TIdleTimerAutoEvent values.
`TImagePaintBackgroundEvent`	procedure type	Specifies an event handler signalled to draw the background for an image.
`TLabelPosition`	enumeration	Specifies the position for a label relative to an associated control.
`TPanelBevel`	type	Alias for the TBevelCut type.
`TResizeStyle`	enumeration	Enumerated type with the drawing styles available when resizing using a splitter.
`TRowSize`	type	Defines the range of values available for the RowSize property in TCustomControlBar.
`TShapePointsEvent`	procedure type	Specifies an event handler used to get an array of user-specified vertices for a polygonal shape in TShape,
`TShapeType`	enumeration	TShapeType is an enumerated type with values representing standard geometric shapes.
`TWrapAfter`	enumeration	Represents the wrapping strategies used in TCustomFlowPanel.

Constants

DefaultSplitterWidth constant

Topics

MultiPageControls topic MultiPageControls - controls that offer a selection of alternative pages for display.

Uses

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.