TFilterComboBox class

In unit FileCtrl

Implements a combo-box used to select a file filter.

Declaration

pascal

TFilterComboBox = class(TCustomFilterComboBox)

Inheritance

Description

TFilterComboBox is a TCustomFilterComboBox descendant which implements a combo-box used to select files which match a selection filter. Use the Filter property to define the filter names and expressions available in the drop-down for the combo-box. Only the filter name is displayed in the combo-box.

Use AutoComplete to enable or disable case-insensitive automatic text completion in the edit area for the combo-box. When set to True, the Filter which starts the typed value is located and selected in the control. Please note that AutoComplete works when the text area is empty, or the entire contents of the editable are are selected.

Use ItemIndex to get the ordinal position in Filter for the selected filter. Use the OnSelect event handler to perform actions needed when a new value is selected in the combo-box.

TFilterComboBox includes a ShellListView property with the TShellListView instance used to display the list of files matching the selected filter. ShellListView is updated (when assigned) in the Select method to use the value in Mask in the list view control. Set the Root property in ShellListView to control the directory displayed in the control.

TFilterComboBox sets the visibility for properties defined in an ancestor class, and does not introduce any new properties, methods, or events. Please note that Some properties are not published for the control, so do they do not appear in the Object Inspector at design-time. For example: Mask.

Properties

`Align`	published	Specifies the placement of the control on its Parent control.
`Anchors`	published	The set of anchor definitions for this control.
`AutoComplete`	published	Positions the list box using partial text matching.
`AutoDropDown`	published	Makes the drop-down list appear as soon as the user starts entering text.
`AutoSize`	published	Allows automatic adjustment of the size for the control, according to its content.
`BidiMode`	published	Indicates whether text controls use in bi-directional reading.
`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.
`DragKind`	published	Indicates the action performed for a drag operation: drag-and-drop or drag-and-dock.
`DragMode`	published	Determines how a drag operation is started for the control.
`Enabled`	published	Determines whether the control responds to mouse or keyboard input.
`Filter`	published	Contains one or more file filters used in the combo-box.
`Font`	published	The font to be used for text display in this control.
`ItemIndex`	published	The index of the currently selected item, or -1 if no item is selected.
`ParentBidiMode`	published	Indicates whether the BiDiMode settings in the Parent control are used.
`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.
`ShellListView`	published	Connects the control to a TShellListView instance.
`ShowHint`	published	Enables Hint display for the control.
`TabOrder`	published	Indicates the navigation order for the control when the user presses the Tab or Shift+Tab key.
`TabStop`	published	Allows the user to navigate to / from the control by pressing the Tab or Shift+Tab keys.
`TextHint`	published	Default hint text shown when the Text property is empty for the control.
`Visible`	published	Allows the control, and all of its children, to be displayed or hidden.

Events

`OnChange`	published	Event handler signalled for user changes to the text in the edit box.
`OnClick`	published	Notification handler for mouse clicks.
`OnCloseUp`	published	Handler invoked when the drop-down list closes.
`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.
`OnDropDown`	published	Handler invoked when the list has dropped down.
`OnEnter`	published	Event handler signalled when the control receives focus.
`OnExit`	published	Event handler signalled when the control loses focus.
`OnKeyDown`	published	Event handler signalled for key down keyboard events.
`OnKeyPress`	published	Event handler signalled for character data entered by the user.
`OnKeyUp`	published	Event handler signalled when a key up event has occurred for the control.
`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.
`OnStartDrag`	published	Event handler signalled for the start of a dragging operation.
`OnSelect`	published	Handler invoked when an item is selected.
`OnUTF8KeyPress`	published	Handler for a character entered by the user.