TMlSkinComboBoxEx

Notes

• The entries live in Values, and ticking a row fires OnCheckStateChanged.
• It suits multi-select filters: the chosen entries are shown back in the edit part.

Example

From the demo MlSkin.Demo.增强下拉列表功能演示.v5.x (.dfm form file)

object MlSkinComboBoxEx2: TMlSkinComboBoxEx
  Left = 8
  Top = 139
  Width = 137
  Height = 26
  Cursor = crIBeam
  TextHintHideInKey = True
  DisableIME = True
  BorderNormal = 'MlSkinBorderNormal'
  BorderHot = 'MlSkinBorderHot'
  Items.Strings = (
  'Travel'
  'Beverage'
  'Automotive'
  'Education'
  'CPG'
  'Government'
  'Nonprofit'
  'Email'
  'Event Screen'

Properties 13

Name	Type	Default	Description
BorderNormal	TMlResID	—	Border image in the normal state, given as an image ID or path.
BorderHot	TMlResID	—	Border image used on hover or while focused.
BorderVisible	Boolean	True	Whether the border is drawn.
CharCase	TEditCharCase	ecNormal	Letter case conversion: as typed, upper case or lower case.
Items	TStrings	—	The control's collection of items, editable one by one in the Object Inspector.
ItemIndex	Integer	-1	Index of the selected item, starting at 0; -1 means none.
ItemHeight	Integer	23	Height of each item in pixels.
Style	TMlSkinCustomComboBoxStyle	csDropDown	Drawing style.
Options	TComboBoxExOptions	—	A group of options for this control; expand it to set them individually.
Values	TStrings	—	The dropdown entries, each with its own check box.
Text	string	—	The text shown or typed in the control.
EdItems	TMlEditItems	—	The items inside the edit: each has its images (normal, hot, pressed), text, position and visibility — this is how clear, search or reveal-password buttons are built.
FontHint	TFont	—	Font of the placeholder text, usually lighter than the main text.

Events 4

Name	Type	Default	Description
OnChange	TNotifyEvent	—	Fires when the content changes.
OnCheckStateChanged	TItemCheckStateChangedEvent	—	Fires when an entry's checked state changes.
OnCloseUp	TNotifyEvent	—	Fires when the dropdown closes.
OnDropDown	TNotifyEvent	—	Fires when the dropdown opens.

Properties of TMlSkinPngEdit 4

Name	Type	Default	Description
TextHint	string	—	Placeholder text shown in a light color while the control is empty, for example "Type a keyword".
TextHintHideInKey	Boolean	False	When the placeholder disappears: with this on it stays while focused and hides only once a character is typed.
CursorColor	TColor	clBlack	Colour of the caret.
DisableIME	Boolean	False	Disables the IME so only Latin letters and digits can be typed — useful for account or serial number fields.

Properties of TMlSkinCustomControl 5

Name	Type	Default	Description
About	TMlAboutInfo	—	A design-time property: double-clicking it in the Object Inspector opens the MLSkin about box with the component version. It has no effect at run time and is not stored in the .dfm.
Transparent	Boolean	True	Transparent background: the control skips its own fill and shows the form background (image or color) instead.
Color	TColor	clWhite	Background color of the control; ignored while Transparent is on.
AutoInvalidate	Boolean	False	Repaints automatically when the content changes. Turn it on if property changes do not show up.
EraseBackground	Boolean	False	Whether the background is erased before painting; worth toggling if the control flickers.

Events of TMlSkinCustomControl 4

Name	Type	Default	Description
OnDPIChanged	TMlDPIChangedEvent	—	Fires when the screen DPI changes, for example when the window moves to a monitor with a different scaling — a good place to re-adjust anything you draw yourself.
OnBackgroundChanging	TMlBackgroundEvent	—	Fires just before the background changes, giving you a chance to adjust what is drawn.
OnBackgroundChanged	TMlCustomDrawEvent	—	Fires after the background has been drawn, so you can paint on top of it.
OnVisibleChanged	TNotifyEvent	—	Fires when the control is shown or hidden.

Only the properties and events MLSkin adds are listed here. Standard VCL properties such as Align, Anchors, Font and OnClick are available too and behave exactly as on the stock controls.