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 a component.

Properties inherited from ITermEdit

	Property name	Brief description
	AutoReparsing	The AutoReparsing property determines whether the text should be automatically transformed into terms and operands.
	DirectInput	The DirectInput property determines the possibility of direct input.
	EnableHyperlinks	The EnableHyperlinks property determines whether it is possible to display a term as a hyperlink.
	Formula	The Formula property determines the term formula.
	Hyperlink	The Hyperlink property determines whether the expression, the index of which is an input parameter, is a hyperlink.
	Terms	The Terms property returns the terms collection.
	WantReturns	The WantReturns property determines whether it should be possible to insert a carriage return symbol into the edited text.
	WantTabs	The WantTabs property determines whether it should be possible to insert a tab symbol into the edited text.
	WordWrap	The WordWarp property determines whether the lines exceeding component length should be 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 that determine the percentage of the size change for the current component when the parent component is resized.
	Brush	The Brush property specifies the brush 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 the background color of a component.
	Cursor	The Cursor property determines how the cursor looks like when you hover over a component during form execution.
	Enabled	The Enabled property determines whether a component is available for a user.
	Focused	The Focused property returns True if the focus is set on the component.
	Font	The Font property defines the parameters of the font used to display text in a component.
	Height	The Height property determines the component height (pixels).
	HelpContext	The HelpContext property determines the unique index for a section of a context help for this component.
	Hint	The Hint property determines the tip text displayed if the mouse pointer is hovered over a component.
	HintTimeout	The HintTimeout determines the time for which the tooltip is displayed.
	Left	The Left property determines the coordinate of the component left edge (pixels).
	Parent	The Parent property determines the 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 should use 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 using the right mouse button.
	Scrolls	The Scrolls property returns parameters of component's scroll bars.
	ShowHint	The ShowHint property determines whether a tool tip should be displayed when you hover over a component.
	TabOrder	The TabOrder property determines the position of a component in a tab order.
	TabStop	The TabStop property determines whether the focus is set to a component when the Tab button is pressed.
	Text	The Text property determines the row identifying a component for a user.
	Top	The Top property determines the coordinate of the component upper edge (pixels).
	Visible	The Visible property determines whether a component is displayed when a form is executed.
	Width	Свойство Width определяет ширину компонента в пикселях.

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, the index of which 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 allows to place the user-defined term into the specified position, after which it returns the term index in the collection.
	lPutLiteral	The PutLiteral method allows to place the literal term into the specified position, after which it returns the term index in the collection.
	PutTerm	The PutTerm method allows to place the term into the specified position, after which it returns the term index in the collection.
	Reparse	The Reparse method transforms editor text and redistribution of terms in the components.

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 the coordinates of a point specified relative to the component coordinate system to screen coordinates.
	DoDragDrop	The DoDragDrop method enables to start drag-and-drop operation.
	GetImage	The GetImage method returns a graphic presentation of a component together with all children.
	ScreenToClient	The ScreenToClient method converts screen coordinates of a point to coordinates specified relative to the component 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 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 a component, when a user starts to drag an object from the component.
	OnClick	The OnClick event occurs if a user clicks a component area using the main mouse button.
	OnControlMove	The OnControlMove event occurs when a component is moved.
	OnControlResize	The OnControlResize event occurs when a component is resized.
	OnDblClick	The OnDblClick event occurs if a user double-clicks a component area using the mouse button.
	OnDragDrop	The OnDragDrop event occurs for a component if a user drops a dragged object over it.
	OnDragEnter	The OnDragEnter event occurs when a dragged object crosses the borders of this component.
	OnDragLeave	The OnDragLeave event occurs when a dragged object leaves the borders of this component.
	OnDragOver	The OnDragOver event occurs for this component when a user drags a dragged object over it.
	OnEnter	The OnEnter event occurs when a component receives focus.
	OnExit	The OnExit event occurs when a component loses focus.
	OnHScroll	The OnHScroll event occurs when the horizontal scrollbar thumb changes its position.
	OnKeyDown	The OnKeyDown event occurs if a component is focused and a keyboard key is pressed.
	OnKeyPress	The OnKeyPress event occurs if a component is focused when a user presses a character key.
	OnKeyPreview	The OnKeyPreview event occurs prior to each event requiring clicking.
	OnKeyUp	The OnKeyUp event occurs if a component is focused and a user releases any button previously pressed.
	OnMouseDown	The OnMouseDown event occurs if the pointer is in component's 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 the 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 on moving the cursor over component.
	OnMouseUp	The OnMouseUp event occurs on releasing mouse button when the pointer is in component area.
	OnMouseWheel	The OnMouseWheel event occurs if the component has focus when the mouse wheel is rotated.
	OnVScroll	The OnVScroll event occurs when the vertical scrollbar thumb changes its position.

See also:

ExtCtrls Assembly Classes