Buttons unit

buttons.pp contains classes, types, and routines used to implements specialized button controls. It registers the following components in the Lazarus IDE component palette:

Additional Tab

• TBitBtn
• TSpeedButton

buttons.pp is part of the Lazarus Component Library ( LCL).

Classes and records

TBitBtn	class	A button with a small image attached.
TButtonGlyph	class	Represents an image that can be attached to a button.
TCustomBitBtn	class	TCustomBitBtn - the ancestor class for TBitBtn.
TCustomSpeedButton	class	The ancestor for the TSpeedButton class.
TSpeedButton	class	A Button used to represent states (checked or unchecked).
TSpeedButtonActionLink	class	Links a TSpeedButton with a TAction instance.

Procedures and functions

BidiAdjustButtonLayout	function	Adjusts the specified button layout for use in bi-directional rendering.
dbgs	function	Gets a String with debugging information from the specified TBitBtnKind instance.
GetButtonCaption	function	Gets the default caption for the specified button identifier.
GetButtonIcon	function	Gets a bitmap with the glyph image for the specified button identifier.
GetButtonImageIndex	function	Gets the ordinal position in the LCL Glyph image list for the specified button identifier.
GetDefaultButtonIcon	function	Gets a scaled bitmap with the default glyph for the specified button identifier.
GetLCLDefaultBtnGlyph	function	Gets the default LCL button glyph for the specified button Kind.
LoadGlyphFromLazarusResource	procedure	Loads the named glyph image from a Lazarus Resource file.
LoadGlyphFromResource	procedure	Loads the image for the specified button glyph from the LCL glyph resource.
LoadGlyphFromResourceName	procedure	Loads a bitmap from a named resource into the specified Glyph.
LoadGlyphFromStock	procedure	Loads the bitmap for the specified Glyph using the image for the specified button identifier.
Register	procedure	Registers components for use in the Lazarus IDE.

Types

TBitBtnKind	enumeration	TBitBtnKind - enumerated type of possible kinds of BitButtons.
TBitBtnKinds	set	TBitBtnKinds - set of TBitBtnKind.
TButtonImage	type	Represents button identifiers defined in the lcltype.pp unit.
TButtonLayout	enumeration	Enumerated type which defines the position for a glyph on a button.
TButtonState	enumeration	A set of constants to define the state of a SpeedButton.
TGetDefaultBitBtnGlyph	procedure type	TGetDefaultBitBtnGlyph - generic method to return a default Bit Button Glyph of specified Kind.
TGlyphDrawEffectsEnabled	enumeration	Controls glyph drawing effects for mouse-over and mouse-down events.
TGlyphImageLayout	enumeration
TGlyphTransparencyMode	enumeration	Enumerated type with transparency mode values for button glyphs.
TNumGlyphs	type	Defines the range of values available to access button glyphs.

Constants

BitBtnImages	constant	Contains button identifiers used to get icons for TBitBtn button glyphs.
BitBtnModalResults	constant	Contains modal result values for buttons defined in TBitBtnKind.
BitBtnResNames	constant	Contains resource names for corresponding button identifiers in TBitBtn.

Variables

GetDefaultBitBtnGlyph

variable

Address of the routine used to get default glyphs for TBitBtn instances.

Uses

• Types
• Classes
• SysUtils
• Math
• LCLType
• LCLProc
• LCLIntf
• LCLStrConsts
• Graphics
• ImgList
• ActnList
• Controls
• StdCtrls
• LMessages
• Forms
• Themes
• Menus
• ImageListCache
• GraphType
• LazUtilities