Class: MenuWrapper (private in ExtendedComboBox

• Inheritance
• Description
• Instance protocol
  • accessing
  • event handling
  • focus handling
  • initialization
  • queries
  • searching

Inheritance:

   Object
   |
   +--GraphicsContext
      |
      +--DeviceGraphicsContext
         |
         +--GraphicsMedium
            |
            +--DisplaySurface
               |
               +--SimpleView
                  |
                  +--View
                     |
                     +--TopView
                        |
                        +--PopUpView
                           |
                           +--ExtendedComboBox::MenuWrapper

Package:

stx:libwidg2

Category:

Views-Interactors

Owner:

ExtendedComboBox

Description:

problem: we have a grab - and get all events;
to simulate regular behaior inside, we have to synthetically simulate
focus control and implicit grab on buttonPress.

[instance variables:]
    comboBox                <ExtendedComboBox>

    widget                  <View>          the widget which contains the menu

    lastPointerView         <View>          view which contained the
                                            mouse pointer.
                                            used for enter/leave event generation.

    implicitGrabView         <View>         view in which button was pressed;
                                            nilled when released (wherever).
                                            If non-nil, all events are forwarded to this
                                            one (for example to scroll with mouse outside the scrollbar)

    eventHandler            <OneArgBlock>   if not nil, the block will
                                            handle all inputEvents

    resizeCursor            <Cursor>        shown for resize handle

    restoreCursor           <Cursor>        default cursor

Instance protocol:

 application

return the application, under which this view was opened,
or nil, if there is no application

 clearImplicitGrab

 preferredExtent

compute & return the preferredExtent from the components' preferrences

 widget

returns the widget wrapped by the menuView

 dispatchEvent: event withFocusOn: focusViewOrNil delegate: doDelegate

dispatch the event

 forwardEvent: ev withFocusOn: focusView

handle a key press event

 setupResizeEventHandler

 wantsFocusWithButtonPress

views which do not like to take the keyboard focus
with buttonPress can do so by redefining this
to return false

 for: aWidget in: aReceiver

create a wrapper for a widget and the receiver, an extented comboBox

 hideRequest

hide request from windowGroup (i.e. via Escape key).
Can be redefined in subclasses which dont like this

 initialize

 level: aNumber

 mapped

grab resources (mouse and keyboard)

 isEventAssignedToResizeArea: ev

 raiseDeiconified

 type

 detectViewAtX: x y: y

detect view at x@y. if no view is detected or
the it is my view, nil is returned

 detectViewAtX: x y: y in: aTopView

detect view at x@y in a top view; if no view is detected
the topview is returned