DBComboBox

Assembly: ExtCtrls;

Description

The DBComboBox class implements the DBComboBox development environment component that displays and edits data organized as a combobox.

Properties inherited from IDBComboBox

  Property name Brief description
DataField The DataField property determines the field of the data source, with which the component is linked.
DataSource The DataSource property links the DBComboBox component to the data set that contains the DataField field.
Field The Field property returns parameters of the field, with which the component is linked.
ReadOnly The ReadOnly property determines whether the user can edit the current record field value.

Properties inherited from IComboBox

  Property name Brief description
DropDownCount The DropDownCount property determines the maximum number of elements simultaneously displayed in the drop-down list.
DroppedDown The DroppedDown property returns True if the component combobox is expanded.
ItemCount The ItemCount property returns the number of combobox lines.
ItemHeight The ItemHeight property returns the height of combobox elements (lines).
ItemIndex The ItemIndex property determines the index of the selected combobox element.
Items The Items property returns the combobox lines collection.
MaxLength The MaxLength property determines the maximum length of the entered text.
SelLength The SelLength property determines the length in characters of the selected component text.
SelStart The SelStart property determines the position to start text selection in the component.
SelText The SelText property determines text selected in the component.
Sorted The Sorted property determines whether combobox lines are automatically sorted in alphabetical order.
Style The Style property determines the display style of combobox.

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 the 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 the 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 IComboBox

  Method name Brief description
ClearEdit The ClearEdit method clears the combobox edit box.
SelectAll The SelectAll method selects all text in the combobox edit box.

Methods inherited from IControl

  Method name Brief description
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.
SetFocus The SetFocus method sets focus to this component.

Events inherited from ComboBox

   Event name Brief description
OnChange The OnChange event occurs when the text in the component edit field is changed.
OnDropDown The OnDropDown event occurs on opening the combobox.
OnItemSelect The OnItemSelect event occurs when an element is selected in the combobox.

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.
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.
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