TPaintBox class

In unit ExtCtrls

Implements a control with a rectangular drawing area using a given Font and Color.

Declaration

pascal

TPaintBox = class(TGraphicControl)

Inheritance

Description

TPaintBox is a TGraphicControl descendant which implements a control with a rectangular drawing area using a given Font and Color. Like its ancestor, TPaintBox provides a Canvas which is used to draw on the control surface. It provides an overridden Paint method to configure the Pen, Brush, and Font for the Canvas prior to calling the inherited Paint method. Use the OnPaint event handler to perform drawing operations needed for the control.

Properties

`Canvas`	public	A clipped window into the parent Canvas.
`Align`	published	Specifies the placement of the control on its Parent control.
`Anchors`	published	The set of anchor definitions for this control.
`BorderSpacing`	published	Determines the inner and outer border spacing for this control.
`Color`	published	The background color for the control.
`Constraints`	published	Contains the minimum and maximum Width and Height for the control.
`DragCursor`	published	The cursor shape shown during a drag operation.
`DragMode`	published	Determines how a drag operation is started for the control.
`Enabled`	published	Determines whether the control responds to mouse or keyboard input.
`Font`	published	The font to be used for text display in this control.
`Hint`	published	The text to show in the Hint window for the control.
`ParentColor`	published	Use the Color from the Parent control, when enabled.
`ParentFont`	published	Indicates if the Font from the Parent control is used in the control.
`ParentShowHint`	published	If True, the value of ShowHint for the control will be the same as the one from the Parent. Default is True.
`PopupMenu`	published	A context-sensitive menu that pops up when the right mouse button is clicked over this control.
`ShowHint`	published	Enables Hint display for the control.
`Visible`	published	Allows the control, and all of its children, to be displayed or hidden.

Methods

`WSRegisterClass`	protected	Registers this component class with the current WidgetSet.
`Paint`	protected	Draws the content for the control.
`GetControlClassDefaultSize`	protected	Gets the default size used for new instances of the class.
`Create`	public	Constructor for the class instance.

Events

`OnChangeBounds`	published	Event handler signalled when the Bounds for the control have been changed.
`OnClick`	published	Notification handler for mouse clicks.
`OnContextPopup`	published	Invoked when a context-sensitive pop-up menu is requested.
`OnDblClick`	published	Event handler signalled when a mouse double click occurs in the control.
`OnDragDrop`	published	Event handler signalled when an object is dropped onto the control.
`OnDragOver`	published	Event handler signalled when a control is dragged over the control instance.
`OnEndDrag`	published	Event handler signalled for the end of a drag-drop operation.
`OnMouseDown`	published	Event handler signalled when a mouse down event is handled for the control.
`OnMouseEnter`	published	Event handler signalled when the mouse pointer has entered the control.
`OnMouseLeave`	published	Event handler signalled when the mouse pointer has left the control.
`OnMouseMove`	published	Event handler signalled when the mouse pointer is moved in the control.
`OnMouseUp`	published	Event handler signalled when a mouse up event is handled for the control.
`OnMouseWheel`	published	Event handler for mouse wheel turned.
`OnMouseWheelDown`	published	Event handler signalled for a downward movement of the mouse wheel.
`OnMouseWheelUp`	published	Event handler signalled for an upward movement of the mouse wheel.
`OnMouseWheelHorz`	published	Event handler signalled for a horizontal movement of the mouse wheel.
`OnMouseWheelLeft`	published	Event handler signalled for a leftward movement of the mouse wheel.
`OnMouseWheelRight`	published	Event handler signalled for a rightward movement of the mouse wheel.
`OnPaint`	published	Event handler signalled to paint the control.
`OnResize`	published	Notification handler for a resize of the control.
`OnStartDrag`	published	Event handler signalled for the start of a dragging operation.