Provided by: libmotif-dev_2.3.8-2build1_amd64
XmCascadeButtonGadget — The CascadeButtonGadget widget class "XmCascadeButtonGadget" "widget class" "CascadeButtonGadget"
CascadeButtonGadget links two menu panes, a MenuBar to a menu pane, or an OptionMenu to a menu pane. It is used in menu systems and must have a RowColumn parent with its XmNrowColumnType resource set to XmMENU_BAR, XmMENU_POPUP, XmMENU_PULLDOWN, or XmMENU_OPTION. It is the only gadget that can have a Pulldown menu pane attached to it as a submenu. The submenu is displayed when this gadget is activated within a PopupMenu, a PulldownMenu, or an OptionMenu. Its visuals can include a label or pixmap and a cascading indicator when it is in a Popup or Pulldown menu pane; or it can include only a label or a pixmap when it is in an OptionMenu. The positioning of the PulldownMenu with respect to the CascadeButton depends on the XmNlayoutDirection resource of the MenuShell. The default behavior associated with a CascadeButtonGadget depends on the type of menu system in which it resides. By default, BSelect controls the behavior of the CascadeButtonGadget. In addition, BMenu controls the behavior of the CascadeButtonGadget if it resides in a PopupMenu system. The actual mouse button used is determined by its RowColumn parent. BMenu also performs the BSelect actions in all types of menu systems. A CascadeButtonGadget's visuals differ from most other button gadgets. When the button becomes armed, its visuals change from a 2-D to a 3-D look, and it displays the submenu that has been attached to it. If no submenu is attached, it simply changes its visuals. When a CascadeButtonGadget within a Pulldown or Popup menu pane is armed as the result of the user moving the mouse pointer into the gadget, it does not immediately display its submenu. Instead, it waits a short time to see if the arming was temporary (that is, the user was simply passing through the gadget), or the user really wanted the submenu posted. This delay is configurable using XmNmappingDelay. CascadeButtonGadget provides a single mechanism for activating the gadget from the keyboard. This mechanism is referred to as a keyboard mnemonic. If a mnemonic has been specified for the gadget, the user may activate it by simply typing the mnemonic while the CascadeButtonGadget is visible. If the CascadeButtonGadget is in a MenuBar and the MenuBar does not have focus, the MAlt modifier must be pressed with the mnemonic. Mnemonics are typically used to interact with a menu using the keyboard. If a CascadeButtonGadget is in a Pulldown or Popup menu pane and there is a submenu attached, the XmNmarginBottom, XmNmarginLeft, XmNmarginRight, and XmNmarginTop resources may enlarge to accommodate XmNcascadePixmap. XmNmarginWidth defaults to 6 if this resource is in a MenuBar; otherwise, it takes LabelGadget's default, which is 2. CascadeButtonGadget uses the XmQTmenuSystem and XmQTspecifyRenderTable traits. Classes CascadeButtonGadget inherits behavior, resources, and traits from the Object, RectObj, XmGadget, and XmLabelGadget classes. The class pointer is xmCascadeButtonGadgetClass. The class name is XmCascadeButtonGadget. New Resources 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). ┌───────────────────────────────────────────────────────────────────────────┐ Binary file (standard input) matches