Memo

Inheritance Hierarchy

          IComponent

          IControl

          ICustomEdit

          IMemo

          Memo

Description

The Memo component is a multiline text editor.

Working with the Component

The Memo component has the same functionality as most text editors, it includes the following hotkeys for quick editing:

Shortcut key Brief description
CTRL+C
CTRL+INSERT
Copy selected text to the clipboard.
CTRL+X
SHIFT+DELETE
Cut selected text to the clipboard.
CTRL+V
SHIFT+INSERT
Paste text from the clipboard.
CTRL+Z Cancel the last editing command.
CTRL+RIGHT Move the cursor to beginning of the next word.
CTRL+RIGHT Move the cursor to beginning of the previous word.
CTRL+DOWN Move the cursor to beginning of the next paragraph.
CTRL+UP Move the cursor to beginning of the previous paragraph.
CTRL+SHIFT+arrow button Select text fragment.
SHIFT+arrow button Select text.

Example

Properties of the Memo Component

  Property name Brief description

Align

The Align property determines behavior of the component when its parent component is resized.

Alignment

The Alignment property determines the alignment of the text label inside the component field.

AllowDrag

The AllowDrag property determines whether an object can be dragged from the 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.

AutoSelect

The AutoSelect property determines whether component text is selected when the component gets focused.

BorderStyle

The BorderStyle property determines a component border style.

Brush

The Brush property determines the brush that is used to fill component area.

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 the entered characters.

ClientHeight

The ClientHeight property is used to receive or specify the height of the component’s client area.

ClientWidth

The ClientWidth property is used to receive or specify the width of the component’s client area.

Color

The Color property determines a component background color.

ComponentCount

The ComponentCount property returns the number of child components.

Components

The Components property returns the child component.

Cursor

The Cursor property determines the look of the cursor over the component.

Data

The Data property is used to store any custom data.

Enabled

The Enabled property determines whether the component is available for the user.

Focused

The Focused property returns True if the focus is set on the component.

Font

The Font property determines the set of characteristics describing the font that is used to display text.

Height

The Height property determines component height.

HelpContext

The HelpContext property determines a unique index for the context help section for this component.

HideSelection

The HideSelection property determines whether the selected component text remains the same when the focus moves to another component.

Hint

The Hint property determines a component tooltip text.

Left

The Left property determines the coordinate of the left border of the component.

Lines

The Lines property determines the component lines collection.

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.

Name

The Name property determines a component name.

Parent

The Parent property determines a parent component.

ParentColor

The ParentColor property determines whether the component inherits the color of the parent component.

ParentFont

The ParentFont property determines whether the component uses the font of the parent component.

ParentShowHint

The ParentShowHint property determines whether a tooltip is displayed.

PopupMenu

The PopupMenu property determines the context menu opened by clicking the component with the additional mouse button.

Scrolls

The Scrolls property returns parameters of component's scrollbars.

ReadOnly

The ReadOnly property determines whether the user can change component text.

ScrollBars

The ScrollBars property determines whether scrollbars are present in the component field.

SelLength

The SelLength property determines the number of characters selected in the component text.

SelStart

The SelStart property determines the cursor position, from which to start text selection in the component.

SelText

The SelText property determines the text selected in the component.

ShowHint

The ShowHint property enables and disables showing a component tooltip.

TabOrder

The TabOrder property determines the component position in the tab order.

TabStop

The TabStop property determines whether the component is focused when the TAB key is pressed.

Tag

The Tag property is not used by the compiler. A user can change the value of the Tag property and use it as he wishes.

Text

The Text property determines the row identifying a component for the user.

Top

The Top property determines the coordinate of the top border of the component.

Visible

The Visible property determines visibility of the component during execution.

WantReturns

The WantReturns property determines whether a 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.

Width

The Width property determines component width.

WordWrap

The WordWarp property determines whether the words that exceed component length are wrapped into a new line.

Methods of the Memo Component

  Method name Brief description

BringToFront

The BringToFront method brings a component to front.

Clear

The Clear method deletes all text in the component.

ClearSelection

The ClearSelection method deletes all text selected in the component.

ClearUndo

The ClearUndo method is used to fix the changes of the Text property.

ClientToScreen

The ClientToScreen method converts the coordinates of a point specified relative to the component coordinate system into screen coordinates.

CopyToClipboard

The CopyToClipboard method enables the user to copy selected data to the clipboard.

CutToClipboard

The CutToClipboard method enables the user to cut selected data and place it to the clipboard.

DoDragDrop

The DoDragDrop method enables to start dragging operation.

GetCharPos

The GetCharPos method returns the number of cursor position in the line.

GetImage

The GetImage method returns the image of the component with all the child components.

GetLinePos

The GetLinePos method returns the number of the line where the cursor is currently located.

PasteFromClipboard

The PasteFromClipboard method pastes data from the clipboard.

ScreenToClient

The ScreenToClient method converts screen coordinates of a point into coordinates specified relative to the component coordinate system.

SelectAll

The SelectAll method selects component text.

SetFocus

The SetFocus method sets focus to this component.

SendToBack

The SendToBack method sends a component to back.

Undo

The Undo method undoes the last text change in the component.

Events of the Memo Component

  Event name Brief description

OnBeginDrag

The OnBeginDrag event occurs for a component when the user starts to drag an object from the component.

OnChange

The OnChange event occurs after changing the Text property of the edited component.

OnClick

The OnClick event occurs if the user clicks the component area.

OnDblClick

The OnDblClick event occurs if the user double-clicks the component area.

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 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 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 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 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 cursor is in component area.

OnMouseWheel

The OnMouseWheel event occurs if the component is focused when the mouse wheel is rotated.

OnVScroll

The OnVScroll event occurs when vertical scrollbar slider changes its position.

See also:

Standard Components