Box Widget Application Header file <X11/Xaw/Box.h> Class Header file <X11/Xaw/BoxP.h> Class boxWidgetClass Class Name Box Superclass Composite The Box widget provides geometry management of arbitrary widgets in a box of a specified dimension. The children are rearranged when resizing events occur either on the Box or its children, or when children are managed or unmanaged. The Box widget always attempts to pack its children as tightly as possible within the geometry allowed by its parent. Box widgets are commonly used to manage a related set of buttons and are often called ButtonBox widgets, but the children are not limited to buttons. The Box's children are arranged on a background that has its own specified dimensions and color. Resources When creating a Box widget instance, the following resources are retrieved from the argument list or from the resource database: Name Class Type Notes Default Value accelerators Accelerators AcceleratorTable NULL ancestorSensitive AncestorSensitive Boolean D True background Background Pixel XtDefaultBackground backgroundPixmap Pixmap Pixmap XtUnspecifiedPixmap borderColor BorderColor Pixel XtDefaultForeground borderPixmap Pixmap Pixmap XtUnspecifiedPixmap borderWidth BorderWidth Dimension 1 children ReadOnly WidgetList R NULL colormap Colormap Colormap Parent's Colormap depth Depth int C Parent's Depth destroyCallback Callback XtCallbackList NULL height Height Dimension A see Layout Semantics hSpace HSpace Dimension 4 mappedWhenManaged MappedWhenManaged Boolean True numChildren ReadOnly Cardinal R 0 orientation Orientation Orientation XtorientVertical screen Screen Screen R Parent's Screen sensitive Sensitive Boolean True vSpace VSpace Dimension 4 translations Translations TranslationTable NULL width Width Dimension A see Layout Semantics x Position Position 0 y Position Position 0 _ hSpace vSpace The amount of space, in pixels, to leave between the children. This resource specifies the amount of space left between the outermost children and the edge of the box. orientation Specifies whether the preferred shape of the box (i.e. the result returned by the query_geometry class method) is tall and narrow XtorientVertical or short and wide XtorientHorizontal. When the Box is a child of a parent which enforces width constraints, it is usually better to specify XtorientVertical (the default). When the parent enforces height constraints, it is usually better to specify XtorientHorizontal. Layout Semantics Each time a child is managed or unmanaged, the Box widget will attempt to reposition the remaining children to compact the box. Children are positioned in order left to right, top to bottom. The packing algorithm used depends on the orientation of the Box. XtorientVertical When the next child does not fit on the current row, a new row is started. If a child is wider than the width of the box, the box will request a larger width from its parent and will begin the layout process from the beginning if a new width is granted. XtorientHorizontal When the next child does not fit on the current row, the Box widens if possible (so as to keep children on a single row); otherwise a new row is started. After positioning all children, the Box widget attempts to shrink its own size to the minimum dimensions required for the layout.