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DRAWITEMSTRUCT structure (winuser.h)

  • Artykuł

Provides information that the owner window uses to determine how to paint an owner-drawn control or menu item. The owner window of the owner-drawn control or menu item receives a pointer to this structure as the lParam parameter of the WM_DRAWITEM message.

Syntax

typedef struct tagDRAWITEMSTRUCT {
  UINT      CtlType;
  UINT      CtlID;
  UINT      itemID;
  UINT      itemAction;
  UINT      itemState;
  HWND      hwndItem;
  HDC       hDC;
  RECT      rcItem;
  ULONG_PTR itemData;
} DRAWITEMSTRUCT, *PDRAWITEMSTRUCT, *LPDRAWITEMSTRUCT;

Members

CtlType

Type: UINT

The control type. This member can be one of the following values. See Remarks.

Value Meaning
ODT_BUTTON
 Owner-drawn button
ODT_COMBOBOX
 Owner-drawn combo box
ODT_LISTBOX
 Owner-drawn list box
ODT_LISTVIEW
 List-view control
ODT_MENU
 Owner-drawn menu item
ODT_STATIC
 Owner-drawn static control
ODT_TAB
 Tab control

CtlID

Type: UINT

The identifier of the combo box, list box, button, or static control. This member is not used for a menu item.

itemID

Type: UINT

The menu item identifier for a menu item or the index of the item in a list box or combo box. For an empty list box or combo box, this member can be -1. This allows the application to draw only the focus rectangle at the coordinates specified by the rcItem member even though there are no items in the control. This indicates to the user whether the list box or combo box has the focus. How the bits are set in the itemAction member determines whether the rectangle is to be drawn as though the list box or combo box has the focus.

itemAction

Type: UINT

The required drawing action. This member can be one or more of the values.

Value Meaning
ODA_DRAWENTIRE
 The entire control needs to be drawn.
ODA_FOCUS
 The control has lost or gained the keyboard focus. The itemState member should be checked to determine whether the control has the focus.
ODA_SELECT
 The selection status has changed. The itemState member should be checked to determine the new selection state.

itemState

Type: UINT

The visual state of the item after the current drawing action takes place. This member can be a combination of the values shown in the following table.

Value Meaning
ODS_CHECKED
 The menu item is to be checked. This bit is used only in a menu.
ODS_COMBOBOXEDIT
 The drawing takes place in the selection field (edit control) of an owner-drawn combo box.
ODS_DEFAULT
 The item is the default item.
ODS_DISABLED
 The item is to be drawn as disabled.
ODS_FOCUS
 The item has the keyboard focus.
ODS_GRAYED
 The item is to be grayed. This bit is used only in a menu.
ODS_HOTLIGHT
 The item is being hot-tracked, that is, the item will be highlighted when the mouse is on the item.
ODS_INACTIVE
 The item is inactive and the window associated with the menu is inactive.
ODS_NOACCEL
 The control is drawn without the keyboard accelerator cues.
ODS_NOFOCUSRECT
 The control is drawn without focus indicator cues.
ODS_SELECTED
 The menu item's status is selected.

hwndItem

Type: HWND

A handle to the control for combo boxes, list boxes, buttons, and static controls. For menus, this member is a handle to the menu that contains the item.

hDC

Type: HDC

A handle to a device context; this device context must be used when performing drawing operations on the control.

rcItem

Type: RECT

A rectangle that defines the boundaries of the control to be drawn. This rectangle is in the device context specified by the hDC member. The system automatically clips anything that the owner window draws in the device context for combo boxes, list boxes, and buttons, but does not clip menu items. When drawing menu items, the owner window must not draw outside the boundaries of the rectangle defined by the rcItem member.

itemData

Type: ULONG_PTR

The application-defined value associated with the menu item. For a control, this parameter specifies the value last assigned to the list box or combo box by the LB_SETITEMDATA or CB_SETITEMDATA message. If the list box or combo box has the LBS_HASSTRINGS or CBS_HASSTRINGS style, this value is initially zero. Otherwise, this value is initially the value that was passed to the list box or combo box in the lParam parameter of one of the following messages:

If CtlType is ODT_BUTTON or ODT_STATIC, itemData is zero.

Remarks

Some control types, such as status bars, do not set the value of CtlType.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header winuser.h (include Windows.h)

See also

CB_ADDSTRING

CB_INSERTSTRING

CB_SETITEMDATA

LB_ADDSTRING

LB_INSERTSTRING

LB_SETITEMDATA

Reference

WM_DRAWITEM