[Overview][Constants][Types][Classes][Procedures and functions][Index] |
[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
Implements a push button control.
Source position: stdctrls.pp line 1267
type TButton = class(TCustomButton) |
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published |
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property Action: TBasicAction; |
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The Action associated with the control. |
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Specifies the placement of the control inside its Parent. |
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The set of anchor definitions for this control. |
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property AutoSize: Boolean; |
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Allows automatic adjustment of the size for the control, according to its content. |
property BidiMode: TBiDiMode; |
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Customization (of text controls) in bidirectional reading environments. |
property BorderSpacing: TControlBorderSpacing; |
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Determines the inner and outer border spacing for this control. |
property Cancel: Boolean; |
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True if the button is the modal Cancel button. |
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The text describing the control to the user. |
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Color used for the button face. |
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property Constraints: TSizeConstraints; |
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The minimum and maximum Width and Height for the control. |
property Default: Boolean; |
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True if the button is the default button in a modal form. |
property DoubleBuffered: Boolean; |
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Allows to reduce flicker in the painting of the control. |
property DragCursor: TCursor; |
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The cursor shape shown while the control is dragged. |
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The operation when the control is dragged - Drag or Dock. |
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Allows the user to drag the control. |
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property Enabled: Boolean; |
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Determines whether the control reacts on mouse or keyboard input. |
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The font to be used for text display in this control. |
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property ParentBidiMode: Boolean; |
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Allows to use the BiDiMode settings in the Parent control. Default is true. |
property ModalResult: TModalResult; |
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Value returned when the control is clicked in a modal form. |
property OnChangeBounds: TNotifyEvent; |
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Event handler for a change of the Bounds of the control. |
property OnClick: TNotifyEvent; |
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Notification handler for mouse clicks. |
property OnContextPopup: TContextPopupEvent; |
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Invoked when a context-sensitive pop-up menu is requested. |
property OnDragDrop: TDragDropEvent; |
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This handler determines the action on an drop onto this control, in a drag-drop operation. |
property OnDragOver: TDragOverEvent; |
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Event handler for a control being dragged over this control. |
property OnEndDrag: TEndDragEvent; |
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Notification handler for the end of a dragging operation. |
property OnEnter: TNotifyEvent; |
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Handler for control receiving the focus. |
property OnExit: TNotifyEvent; |
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Handler for control loosing the focus; This is a good place for checking the finished user input. |
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Handler for keyboard key pressed. |
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property OnKeyPress: TKeyPressEvent; |
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Handler for a character entered by the user. |
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Handler for keyboard key released. |
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property OnMouseDown: TMouseEvent; |
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Event handler for mouse button going down. |
property OnMouseEnter: TNotifyEvent; |
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Event handler for mouse entering the area of the control. |
property OnMouseLeave: TNotifyEvent; |
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Event handler for mouse leaving the area of the control. |
property OnMouseMove: TMouseMoveEvent; |
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Event handler for mouse movement within the control. |
property OnMouseUp: TMouseEvent; |
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Event handler for mouse button going up. |
property OnMouseWheel: TMouseWheelEvent; |
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Event handler for mouse wheel turned. |
property OnMouseWheelDown: TMouseWheelUpDownEvent; |
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Event handler for downward movement of mouse wheel. |
property OnMouseWheelUp: TMouseWheelUpDownEvent; |
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Event handler for upward movement of the mouse wheel. |
property OnResize: TNotifyEvent; |
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Notification handler for a resize of the control. |
property OnStartDrag: TStartDragEvent; |
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Event handler for the start of a dragging operation. |
property OnUTF8KeyPress: TUTF8KeyPressEvent; |
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Handler for a character entered by the user. |
property ParentDoubleBuffered: Boolean; |
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Value from the DoubleBuffered property in a Parent control. |
property ParentFont: Boolean; |
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If true, the Font of the control will be the same as the one from the Parent. Default is true. |
property ParentShowHint: Boolean; |
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If true, the value of ShowHint for the control will be the same as the one from the Parent. Default is true. |
property PopupMenu: TPopupMenu; |
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A context-sensitive menu that pops up when the right mouse button is clicked over this control. |
property ShowHint: Boolean; |
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Enables the Hint display. |
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Determines the sequence of control navigation when the user presses the Tab key. |
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property TabStop: Boolean; |
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Enables navigation using the Tab key. |
property Visible: Boolean; |
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Allows the control, and all of its children, to be displayed or hidden. |
end; |
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Implements a push button control. |
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The base class for a push button control. |
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Specifies a base class for button controls. |
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The base class for controls which can contain other (child) controls. |
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The base class for visible controls. |
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The base class for LCL components which have an associated widget. |
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TComponent |
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TObject |
TButton is a TCustomButton descendant which implements a push button control. TButton is used to perform an action when the control is clicked. An OnClick event handler is provided to perform actions needed when the push button is clicked. TButton provides support for the TBasicAction class defined in the FPC Run-time Library (RTL).
Properties are provided to control the appearance and behavior for the control. This includes whether it is the Default or Cancel button on a modal form, and the modal result returned when the push button is clicked.
The control displays a text-based caption and is drawn using a style appropriate for the platform or widgetset. An accelerator key can be defined in the caption which simulates clicking on the push button when the shortcut key is pressed.
Please note that the Caption in the control is always centered. The values in properties like BiDiMode and UseRightToLeftAlignment are ignored in the control.
Please note that the Color for the control defaults to the system-defined color used for button controls.
TButton sets the visibility for properties defined in the ancestor class, and does not introduce any new methods.
Use TBitBtn for a push button control which displays a bitmap instead of a text-based caption.
Use TSpeedButton for a push button control which can remain in the pressed or down state.
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The base class for a push button control. |
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