CODEWITHSUNDEEP
c++windowsmfc
Douglas Lankshear
Douglas Lankshear

Reputation: 23

Is there a notification code when cursor position changes in Edit Control MFC?

Is there a notification code sent when the cursor position changes in an Edit Control MFC? I want to display the cursor (character) position for the user

Upvotes: 2

Views: 481

Answers (1)

Remy Lebeau
Remy Lebeau

Reputation: 597051

There is no EN_... notification sent by the Edit control itself when the caret position changes.

However, you can use SetWinEventHook() to register for EVENT_OBJECT_LOCATIONCHANGE notifications for your app's process ID and UI thread ID.

EVENT_OBJECT_LOCATIONCHANGE
0x800B

An object has changed location, shape, or size. The system sends this event for the following user interface elements: caret and window objects. Server applications send this event for their accessible objects.

You can then have your callback function filter the notifications by checking if the provided hwnd is your Edit control and the provided idObject is OBJID_CARET.

OBJID_CARET

The text insertion bar (caret) in the window.

When detected, you can get the actual caret position by sending an EM_GETSEL message to the Edit control.

Gets the starting and ending character positions (in TCHARs) of the current selection in an edit control.

Or, if you are using the CEdit class, use its GetSel() method.

Call this function to get the starting and ending character positions of the current selection (if any) in an edit control, using either the return value or the parameters.

Upvotes: 5

Related Questions