Base class for box containers
Class GtkBox
GtkBox is an abstract widget which encapsulates functionality for a particular kind of container, one that organizes a variable number of widgets into a rectangular area. GtkBox has a number of derived classes, e.g. GtkHBox and GtkVBox.
The rectangular area of a GtkBox is organized into either a single row or a single column of child widgets depending upon whether the box is of type GtkHBox or GtkVBox, respectively. Thus, all children of a GtkBox are allocated one dimension in common, which is the height of a row, or the width of a column.
GtkBox uses a notion of packing. Packing refers to adding widgets with reference to a particular position in a GtkContainer. For a GtkBox, there are two reference positions: the start and the end of the box. For a GtkVBox, the start is defined as the top of the box and the end is defined as the bottom. For a GtkHBox the start is defined as the left side and the end is defined as the right side.
Use repeated calls to gtk_box_pack_start() to pack widgets into a GtkBox from start to end. Use gtk_box_pack_end() to add widgets from end to start. You may intersperse these calls and add widgets from both ends of the same GtkBox.
Use gtk_box_pack_start_defaults() or gtk_box_pack_end_defaults() to pack widgets into a GtkBox if you do not need to specify the "expand", "fill", or "padding" child properties for the child to be added.
Because GtkBox is a GtkContainer, you may also use gtk_container_add() to insert widgets into the box, and they will be packed as if with gtk_box_pack_start_defaults(). Use gtk_container_remove() to remove widgets from the GtkBox.
Use gtk_box_set_homogeneous() to specify whether or not all children of the GtkBox are forced to get the same amount of space.
Use gtk_box_set_spacing() to determine how much space will be minimally placed between all children in the GtkBox.
Use gtk_box_reorder_child() to move a GtkBox child to a different place in the box.
Use gtk_box_set_child_packing() to reset the "expand", "fill" and "padding" child properties. Use gtk_box_query_child_packing() to query these fields.
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| Methods | |
| get_homogeneous | Returns whether the box is homogeneous (all children are the same size). |
| get_spacing | Gets the value set by gtk_box_set_spacing(). |
| pack_end | Adds child to box, packed with reference to the end of box. |
| pack_end_defaults | Adds widget to box, packed with reference to the end of box. |
| pack_start | Adds child to box, packed with reference to the start of box. |
| pack_start_defaults | Adds widget to box, packed with reference to the start of box. |
| query_child_packing | Obtains information about how child is packed into box. |
| reorder_child | Moves child to a new position in the list of box children. |
| set_child_packing | Sets the way child is packed into box. |
| set_homogeneous | Sets the "homogeneous" property of box, controlling whether or not all children of box are given equal space in the box. |
Returns whether the box is homogeneous (all children are the same size).
GtkBox.get_homogeneous()
| Return | TRUE if the box is homogeneous. |
Gets the value set by gtk_box_set_spacing().
GtkBox.get_spacing()
| Return | spacing between children |
Adds child to box, packed with reference to the end of box.
GtkBox.pack_end( child, expand, fill, padding )
| child | the GtkWidget to be added to box |
| expand | TRUE if the new child is to be given extra space allocated to box. The extra space will be divided evenly between all children of box that use this option. |
| fill | TRUE if space given to child by the expand option is actually allocated to child, rather than just padding it. This parameter has no effect if expand is set to FALSE. A child is always allocated the full height of a GtkHBox and the full width of a GtkVBox. This option affects the other dimension. |
| padding | extra space in pixels to put between this child and its neighbors, over and above the global amount specified by "spacing" property. If child is a widget at one of the reference ends of box, then padding pixels are also put between child and the reference edge of box. |
The child is packed after (away from end of) any other child packed with reference to the end of box.
Adds widget to box, packed with reference to the end of box.
GtkBox.pack_end_defaults( widget )
| widget | the GtkWidget to be added to box |
The child is packed after any other child packed with reference to the start of box.
Parameters for how to pack the child widget, "expand", "fill" and "padding", are given their default values, TRUE, TRUE, and 0, respectively.
Adds child to box, packed with reference to the start of box.
GtkBox.pack_start( child, expand, fill, padding )
| child | the GtkWidget to be added to box |
| expand | TRUE if the new child is to be given extra space allocated to box. The extra space will be divided evenly between all children of box that use this option. |
| fill | TRUE if space given to child by the expand option is actually allocated to child, rather than just padding it. This parameter has no effect if expand is set to FALSE. A child is always allocated the full height of a GtkHBox and the full width of a GtkVBox. This option affects the other dimension. |
| padding | extra space in pixels to put between this child and its neighbors, over and above the global amount specified by "spacing" property. If child is a widget at one of the reference ends of box, then padding pixels are also put between child and the reference edge of box. |
The child is packed after any other child packed with reference to the start of box.
Adds widget to box, packed with reference to the start of box.
GtkBox.pack_start_defaults( widget )
| widget | the GtkWidget to be added to box |
The child is packed after any other child packed with reference to the start of box.
Parameters for how to pack the child widget, "expand", "fill" and "padding", are given their default values, TRUE, TRUE, and 0, respectively.
Obtains information about how child is packed into box.
GtkBox.query_child_packing( child )
| child | the GtkWidget of the child to query |
| Return | an array [ expand, fill, padding, GtkPackType ] |
Moves child to a new position in the list of box children.
GtkBox.reorder_child( child, position )
| child | the GtkWidget to move |
| position | the new position for child in the list of children of box, starting from 0. If negative, indicates the end of the list |
The list is the children field of GtkBox, and contains both widgets packed GTK_PACK_START as well as widgets packed GTK_PACK_END, in the order that these widgets were added to box.
A widget's position in the box children list determines where the widget is packed into box. A child widget at some position in the list will be packed just after all other widgets of the same packing type that appear earlier in the list.
Sets the way child is packed into box.
GtkBox.set_child_packing( child, expand, fill, padding, pack_type )
| child | the GtkWidget of the child to set |
| expand | the new value of the "expand" child property |
| fill | the new value of the "fill" child property |
| padding | the new value of the "padding" child property |
| pack_type | the new value of the "pack-type" child property |
Sets the "homogeneous" property of box, controlling whether or not all children of box are given equal space in the box.
GtkBox.set_homogeneous( homogeneous )
| homogeneous | a boolean value, TRUE to create equal allotments, FALSE for variable allotments. |