ExpressionEdit

Description

The ExpressionEdit class implements the ExpressionEdit development environment component.

Properties inherited from IExpressionEdit

	Property name	Brief description
	Expression	The Expression property determines an expression located in the component.

Properties inherited from ITermEdit

	Property name	Brief description
	AutoReparsing	The AutoReparsing property determines whether the text is automatically transformed into terms (expressions) and operands.
	DirectInput	The DirectInput property determines whether direct input is available.
	EnableHyperlinks	The EnableHyperlinks property determines whether a term can be displayed as a hyperlink.
	Formula	The Formula property determines a term formula.
	Hyperlink	The Hyperlink property determines whether the expression, which index is an input parameter, is a hyperlink.
	Terms	The Terms property returns the terms (expressions) collection.
	WantReturns	The WantReturns property determines whether carriage return symbol can be inserted into the edited text.
	WantTabs	The WantTabs property determines whether a tab symbol can be inserted into the edited text.
	WordWrap	The WordWarp property determines whether the lines exceeding component length are wrapped to a new line.

Properties inherited from ICustomEdit

	Property name	Brief description
	AutoSelect	The AutoSelect property determines whether all the text of a component must be selected, when a component receives focus.
	BorderStyle	The BorderStyle property determines the style of a component border.
	CanUndo	The CanUndo property returns True if it is possible to undo text changes in the component.
	CharacterCasing	The CharacterCasing property determines the case of entered component characters.
	HideSelection	The HideSelection property determines whether the selected component text should remain the same when the focus goes to another component.
	MaxLength	The MaxLength property determines the maximum length of the entered text.
	Modified	The Modified property returns True if the component text has been changed.
	ReadOnly	The ReadOnly property determines whether a user is able to change the component text.
	SelLength	The SelLength property determines the length in characters of the selected text in the component.
	SelStart	The SelStart property determines the position to start text selection in the component.
	SelText	The SelText property determines text selected in the component.

Properties inherited from IControl

	Property name	Brief description
	Align	The Align property determines component alignment within its parent component.
	AllowDrag	The AllowDrag property determines whether an object can be dragged from a component.
	AllowDrop	The AllowDrop property determines whether the component can accept a dragged object.
	Anchors	The Anchors property returns settings determining % of the resize for the current component when the parent component is resized.
	Brush	The Brush property determines the brush that is used to fill the component area.
	ClientHeight	The ClientHeight property determines the height of the client component area.
	ClientWidth	The ClientWidth property determines the width of the client component area.
	Color	The Color property determines color of the component background.
	Cursor	The Cursor property determines how the cursor looks like when is it hovered over a component during form execution.
	Enabled	The Enabled property determines whether a component is available for the user.
	Focused	The Focused property returns True if the focus is set to the component.
	Font	The Font property determines parameters of the font that is used to display text in the component.
	Height	The Height property determines component height in pixels.
	HelpContext	The HelpContext property determines a unique index for a section of a context help for this component.
	Hint	The Hint property determines a tooltip text displayed on hovering over the component.
	HintTimeout	The HintTimeout property determines for how long a tooltip is displayed.
	Left	The Left property determines a coordinate of the component left edge in pixels.
	Parent	The Parent property determines a parent component.
	ParentColor	The ParentColor property determines whether a component inherits the color of the parent component.
	ParentFont	The ParentFont property determines whether a component uses the font of the parent component.
	ParentShowHint	The ParentShowHint property determines when a tooltip is displayed.
	PopupMenu	The PopupMenu property determines the context menu displayed when a component is clicked with the right mouse button.
	Scrolls	The Scrolls property returns parameters of component's scrollbars.
	ShowHint	The ShowHint property determines whether a tooltip is displayed when the component is hovered.
	TabOrder	The TabOrder property determines a component position in a tab order.
	TabStop	The TabStop property determines whether the component must be focused when the Tab button is pressed.
	Text	The Text property determines a row identifying a component for the user.
	Top	The Top property determines a coordinate of the component top edge in pixels.
	Visible	The Visible property determines whether the component is displayed when a form is executed.
	Width	The Width property sets component width in pixels.

Properties inherited from IComponent

	Property name	Brief description
	ComponentCount	The ComponentCount property returns the number of child components located on the parent component.
	Components	The Components property returns a child component, which index is passed via the input parameter.
	Data	The Data property is used to store any custom data.
	Name	The Name property determines the component name.
	Tag	The Tag property is not used by the compiler. The user can change the value of this property and use it at his discretion.

Methods inherited from IExpressionEdit

	Method name	Brief description
	UpdateExpression	The UpdateExpression method updates the expression.

Methods inherited from ITermEdit

	Method name	Brief description
	BeginUpdate	The BeginUpdate method disables a set of internal mechanisms for accelerating insertion of terms into the component.
	EndUpdate	The EndUpdate method restores work of internal mechanisms of the component, which were disabled for acceleration of insertion of terms into the component.
	PutCustom	The PutCustom method places the custom term into the specified position.
	lPutLiteral	The PutLiteral method places the literal term into the specified position.
	PutTerm	The PutTerm method places the term into the specified position.
	Reparse	The Reparse method transforms editor text and redistributes terms in the component.

Methods inherited from ICustomEdit

	Method name	Brief description
	Clear	The Clear method deletes all text in the component.
	ClearSelection	The ClearSelection method deletes selected text in component.
	ClearUndo	The ClearUndo method is used to fix the changes of the Text property.
	CopyToClipboard	The CopyToClipboard method copies selected data to clipboard.
	CutToClipboard	The CutToClipboard method cuts selected data to clipboard.
	PasteFromClipboard	The PasteFromClipboard method pastes data from clipboard.
	SelectAll	The SelectAll method selects all text in the component.
	Undo	The Undo method cancels last text change in the component.

Methods inherited from IControl

	Method name	Brief description
	BringToFront	Outdated. The BringToFront method brings a component to the foreground.
	ClientToScreen	The ClientToScreen method converts point coordinates specified relative to the component's coordinate system into screen coordinates.
	DoDragDrop	The DoDragDrop method enables the user to start dragging operation.
	GetImage	The GetImage method returns a graphic presentation of a component together with all child components.
	ScreenToClient	The ScreenToClient method converts point's screen coordinates into coordinates specified relative to the component's coordinate system.
	SendToBack	Outdated. The SendToBack method is used to send a component to the background.
	SetFocus	The SetFocus method sets focus to this component.

Events inherited from TermEdit

	Event name	Brief description
	OnHyperlink	The OnHyperlink event occurs on clicking on the term hyperlink in the expression.
	OnParseTerm	The OnParseTerm event occurs when the editor text is transformed into terms (expressions) and operands.

Events inherited from ICustomEdit

	Event name	Brief description
	OnChange	The OnChange event occurs after changing the Text property of the edited component.

Events inherited from IControl

	Event name	Brief description
	OnBeginDrag	The OnBeginDrag event occurs for the component when the user starts to drag an object from the component.
	OnClick	The OnClick event occurs if the user clicks the component area with the main mouse button.
	OnControlMove	The OnControlMove event occurs when the component is moved.
	OnControlResize	The OnControlResize event occurs when the component is resized.
	OnDblClick	The OnDblClick event occurs if the user double-clicks the component area with the mouse button.
	OnDragDrop	The OnDragDrop event occurs for the component if the user drops a dragged object over it.
	OnDragEnter	The OnDragEnter event occurs when a dragged object enters the component area.
	OnDragLeave	The OnDragLeave event occurs when a dragged object leaves component borders.
	OnDragOver	The OnDragOver event occurs for the component when the user drags an object over it.
	OnEnter	The OnEnter event occurs when the component receives focus.
	OnExit	The OnExit event occurs when the component loses focus.
	OnHScroll	The OnHScroll event occurs when horizontal scrollbar slider changes its position.
	OnKeyDown	The OnKeyDown event occurs if the component is focused and a keyboard key is pressed.
	OnKeyPress	The OnKeyPress event occurs if the component is focused when the user presses a character key.
	OnKeyPreview	The OnKeyPreview event occurs prior to each event related to key pressing.
	OnKeyUp	The OnKeyUp event occurs if the component is focused and the user releases any button previously pressed.
	OnMouseDown	The OnMouseDown event occurs if the pointer is in the component area and a mouse key is pressed.
	OnMouseEnter	The OnMouseEnter event occurs when mouse cursor enters the component area.
	OnMouseHover	The OnMouseHover event occurs when mouse cursor is held in the component area.
	OnMouseLeave	The OnMouseLeave event occurs when mouse cursor leaves the component area.
	OnMouseMove	The OnMouseMove event occurs when the cursor is moved over the component.
	OnMouseUp	The OnMouseUp event occurs when the mouse button is released and the cursor is in the component area.
	OnMouseWheel	The OnMouseWheel event occurs if the component is focused when the user rotates a mouse wheel.
	OnVScroll	The OnVScroll event occurs when vertical scrollbar slider changes its position.

See also:

ExtCtrls Assembly Classes