XmMenuShell(3)

NAME
XmMenuShell — The MenuShell widget class

SYNOPSIS

#include <Xm/MenuShell.h>

DESCRIPTION

The MenuShell widget is a custom OverrideShell widget. An OverrideShell widget bypasses mwm when displaying itself. It is designed specifically to contain Popup or Pulldown menu panes.

Most application writers never encounter this widget if they use the menu-system convenience functions, XmCreatePopupMenu or XmCreatePulldown Menu, to create a Popup or Pulldown menu pane. The convenience functions automatically create a MenuShell widget as the parent of the menu pane. However, if the convenience functions are not used, the application programmer must create the required MenuShell. In this case, it is important to note that the parent of the MenuShell depends on the type of menu system being built.

•   If the MenuShell is for the top-level Popup menu pane, the MenuShell's parent must be the widget from which the Popup menu pane is popped up.

•   If the MenuShell is for a menu pane that is pulled down from a Popup or another Pulldown menu pane, the MenuShell's parent must be the Popup or Pulldown menu pane.

•   If the MenuShell is for a menu pane that is pulled down from a MenuBar, the MenuShell's parent must be the MenuBar.

•   If the MenuShell is for a Pulldown menu pane in an OptionMenu, the MenuShell's parent must be the OptionMenu's parent.

Setting XmNheight, XmNwidth, or XmNborderWidth for either a MenuShell or its child sets that resource to the same value in both the parent and the child. An application should always specify these resources for the child, not the parent.

For the managed child of a MenuShell, regardless of the value of the shell's XmNallowShellResize, setting XmNx or XmNy sets the corresponding resource of the parent but does not change the child's position relative to the parent. XtGetValues for the child's XmNx or XmNy yields the value of the corresponding resource in the parent. The x and y-coordinates of the child's upper left outside corner relative to the parent's upper left inside corner are both 0 (zero) minus the value of XmNborderWidth.

MenuShell uses the XmQTmenuSystem trait and holds the XmQTspecifyRenderTable trait.

  Classes

MenuShell inherits behavior, resources, and traits from Core, Composite, Shell, and OverrideShell.

The class pointer is xmMenuShellWidgetClass.

The class name is XmMenuShell.

  New Resources

MenuShell overrides the XmNallowShellResize resource in Shell. The following table defines a set of widget resources used by the programmer to specify data. The programmer can also set the resource values for the inherited classes to set attributes for this widget. To reference a resource by name or by class in a .Xdefaults file, remove the XmN or XmC prefix and use the remaining letters. To specify one of the defined values for a resource in a .Xdefaults file, remove the Xm prefix and use the remaining letters (in either lowercase or uppercase, but include any underscores between words). The codes in the access column indicate if the given resource can be set at creation time (C), set by using XtSetValues (S), retrieved by using XtGetValues (G), or is not applicable (N/A).

XmNbuttonFontList
    Specifies the font list used for button descendants. See the XmNbuttonRenderTable resource.

XmNbuttonRenderTable
    Specifies the render table used for MenuShell's button descendants. If this value is NULL at initialization and if the value of XmNdefaultFontList is not NULL, XmNbuttonRenderTable is initialized to the value of XmNdefaultFontList. If the value of XmNdefaultFontList is NULL, XmNbuttonRenderTable is initialized by looking up the parent hierarchy of the widget for an ancestor that holds the XmQTspecifyRenderTable trait. If such an ancestor is found, XmNbuttonRenderTable is initialized to the XmBUTTON_RENDER_TABLE value of the ancestor widget. If no such ancestor is found, the default is implementation dependent. Refer to XmRenderTable(3) for more information on the creation and structure of a render table.

XmNdefaultFontList
    Specifies a default font list for MenuShell's descendants. This resource is obsolete and exists for compatibility with earlier releases. It has been replaced by XmNbuttonFontList and XmNlabelFontList.

XmNlabelFontList
    Specifies the font list used for label descendants. See the XmNlabelRenderTable resource.

XmNlabelRenderTable
    Specifies the render table used for MenuShell's label descendants (Labels and LabelGadgets). If this value is NULL at initialization and if the value of XmNdefaultFontList is not NULL, XmNlabelRenderTable is initialized to the value of XmNdefaultFontList. If the value of XmNdefaultFontList is NULL, the parent hierarchy of the widget is searched for an ancestor that holds the XmQTspecifyRenderTable trait. If such an ancestor is found, XmNlabelRenderTable is initialized to the XmLABEL_RENDER_TABLE value of the ancestor widget. If no such ancestor is found, the default is implementation dependent. Refer to XmRenderTable(3) for more information on the creation and structure of a render table.

XmNlayoutDirection
    Specifies the direction in which the subwidgets, children of a widget, or other visual components are to be laid out. This policy will apply as the default layout policy for all descendants of this MenuShell.

  Inherited Resources

MenuShell inherits behavior and resources from the superclasses described in the following tables. For a complete description of each resource, refer to the reference page for that superclass. The programmer can set the resource values for these inherited classes to set attributes for this widget. To reference a resource by name or by class in a .Xdefaults file, remove the XmN or XmC prefix and use the remaining letters. To specify one of the defined values for a resource in a .Xdefaults file, remove the Xm prefix and use the remaining letters (in either lowercase or uppercase, but include any underscores between words). The codes in the access column indicate if the given resource can be set at creation time (C), set by using XtSetValues (S), retrieved by using XtGetValues (G), or is not applicable (N/A).

  Translations

The XmMenuShell translations are described in the following list.

The following key names are listed in the X standard key event translation table syntax. This format is the one used by Motif to specify the widget actions corresponding to a given key. A brief overview of the format is provided under VirtualBindings(3). For a complete description of the format, please refer to the X Toolkit Instrinsics Documentation.

<BtnDown>:
    ClearTraversal()

<BtnUp>:
    MenuShellPopdownDone()

  Action Routines

The XmMenuShell action routines are

ClearTraversal():
    Disables keyboard traversal for the menu, enables mouse traversal, and unposts any menus posted by this menu.

MenuShellPopdownDone():
    Unposts the menu hierarchy and, when the shell's keyboard focus policy is XmEXPLICIT, restores focus to the widget that had the focus before the menu system was entered.

MenuShellPopdownOne():
    In a top-level Pulldown MenuPane from a MenuBar, this action unposts the menu, disarms the MenuBar CascadeButton and the MenuBar, and, when the shell's keyboard focus policy is XmEXPLICIT, restores keyboard focus to the widget that had the focus before the MenuBar was entered. In other Pulldown MenuPanes, this action unposts the menu.

    In a Popup MenuPane, this action unposts the menu, and, when the shell's keyboard focus policy is XmEXPLICIT, restores keyboard focus to the widget from which the menu was posted.

  Virtual Bindings

The bindings for virtual keys are vendor specific. For information about bindings for virtual buttons and keys, see VirtualBindings(3).

RELATED

Composite(3), Core(3), OverrideShell(3), Shell(3), XmCreateMenuShell(3), XmCreatePopupMenu(3), XmCreatePulldownMenu(3), and XmRowColumn(3).