'ACCELERATOR'

Call associated with %ac (Accelerator Key).

'BEGIN_DRAG'

An item in a %lv (List View) or %bv (Branch View) is being dragged.

'BEGIN_EDIT'

A label is about to be edited in a %lv (List View) or %bv (Branch View).

'BUTTON_PRESS'

A button has been pressed.

'CHECKBOX_CHANGE'

A checkbox in a %lv (List View) has changed state.

'CLOSEUP'

The droplist in a %el (Editable Combo Box) has been closed.

'COLOURING'

User_colour event for edit box (%eb (Edit Box)).

'DATA_ALTERATION'

The contents of %eb (Edit Box), %rd (Edit Integer) (etc.) box have been altered.

'DIRTY'

Indicates an OpenGL window is in need of re-painting.

'DO_COMMAND'

The callback was called because of calling DO_COMMAND@. See also %rc (Register Command).

'DRAG_AND_DROP'

Call in response to dropping a file onto the window.

'DROP_TARGET'

During a drag and drop this reason is used to identify when the target of the drag changes. This will change as the mouse moves. Applies to %bv (Branch View) and %lv (List View).

'DROPDOWN'

The droplist in a %el (Editable Combo Box) has been opened.

'DROPPED_FILE'

A file has been dropped - see %dr (OnDragDrop Callback).

'EDIT_KEY_DOWN'

The user has pressed a keyboard key during a label edit. Applies to %bv (Branch View) and %lv (List View).

'END_DRAG'

An item in a %lv (List View) or %bv (Branch View) has completed a drag.

'END_EDIT'

A label is about to be edited in a %lv (List View) or %bv (Branch View)

'ENUMERATED_PARAMETER'

An enumerated parameter (%ep (Enumerated parameter)) has been selected from within a parameter box.

'FILE_OPEN'

Call from standard call-backs 'FILE_OPENR' or 'FILE_OPENW'.

'GAINING_FOCUS'

Edit box gets input focus.

'HSCROLL'

Horizontal scrollbar moved

'HYPERTEXT_CHANGE'

Called when hypertext is being changed.

'HYPERTEXT_LINK'

Call-back from activating a hypertext link in %ht or %wb.

'ITEM_DOUBLE_CLICKED'

Listbox item double clicked.

'ITEM_EXPANDED'

A node in a %bv (Branch View) has been expanded or collapsed.

'ITEM_SELECTED'

Listbox item selected.

'KEY_DOWN'

A keyboard key has been pressed.

'LEFT_MOUSE_PRESS'

This indicates that a graphics icon has been dragged within a %gr (Graphics Region). See also: ADD_GRAPHICS_ICON@.

'LOSING_FOCUS'

Edit box loses input focus.

'MB_COMMAND'

Button press in a %mb (Multi-button Toolbar).

'MB_CUSTOMISE?'

User has double clicked the customise dialog in a %mb (Multi-button Toolbar).

'MB_DELETE?'

User has started moving a button in a %mb (Multi-button Toolbar).

'MB_DROPDOWN?'

User has requested a dropdown menu in a %mb (Multi-button Toolbar).

'MB_HELP'

User has clicked the help button in the customised dialog in a %mb (Multi-button Toolbar).

'MB_INSERT?'

User has completed moving a button in a %mb (Multi-button Toolbar).

'MDI_PAGE_TURN'

The active child window has changed in a %fr (MDI Frame).

'MENU_SELECTION'

A menu item has been invoked.

'MESSAGE_HOOK'

Call of %mg (Message Callback) related function.

'MOUSE_CLICK'

Node clicked in a %bv (Branch View).

'MOUSE_ENTER', 'MOUSE_LEAVE'

Indicates that the mouse has entered or left the area of a %ib (Image Button). The %ib must have the [mouse_hover] option for this callback reason to be used.

'MOUSE_LEFT_CLICK'

Left button down.

'MOUSE_LEFT_RELEASE'

Left button up.

'MOUSE_DOUBLE_CLICK'

Left double click.

'MOUSE_MIDDLE_CLICK'

Middle button down.

'MOUSE_MIDDLE_RELEASE'

Middle button up.

'MOUSE_MOVE'

Mouse movement.

'MOUSE_RIGHT_CLICK'

Right button down.

'MOUSE_RIGHT_RELEASE'

Right button up.

'PLOT_ADJUST'

When a %pl (SIMPLEPLOT Graphics Region) is changed -- resize for example.

'QUERY_SHUTDOWN'

Windows is asking to shutdown. See %ew (Exit Windows Callback).

'RESIZE'

Called when a control is being re-sized.

'SCROLL'

Scroll complete.

'SET_SELECTION'

An item has been selected in a %lv (List View) or %bv (Branch View).

'SETUP'

OpenGL window resized, see %og (OpenGL Graphics Region).

'SIZE_ADJUST'

A %ib (Image Button) is about to be displayed.

'STRING_CHANGE'

Text has changed in a %el (Editable Combo Box).

'TIMER'

Timer has fired in a %dl (Timer).

'USER_MESSAGE'

Message recieved via %rm (External Message Handler).

'USER_PARAMETER'

A user parameter (%up (User callback parameter)) has been selected from within a parameter box.

'TIMER'

Call associated with %dl (Timer).

'VSCROLL'

Vertical scrollbar moved

'WINDOW_CLOSE'

Call in response to %cc (Control Closure).

'WINDOW_CLOSED'

Call in response to %`cc.

'WINDOW_STARTUP'

Call in response to %sc (OnShow Callback).

'+'

Called as part of a compound call-back.

'?'

Not currently in a call-back.