Composite by placing them either in
horizontal rows or vertical columns within the parent Composite.
RowLayout aligns all controls in one row if the
type is set to horizontal, and one column if it is
set to vertical. It has the ability to wrap, and provides configurable
margins and spacing. RowLayout has a number of configuration
fields. In addition, the height and width of each control in a
RowLayout can be specified by setting a RowData
object into the control using setLayoutData ().
The following example code creates a RowLayout, sets all
of its fields to non-default values, and then sets it into a
Shell.
RowLayout rowLayout = new RowLayout(); rowLayout.wrap = false; rowLayout.pack = false; rowLayout.justify = true; rowLayout.type = SWT.VERTICAL; rowLayout.marginLeft = 5; rowLayout.marginTop = 5; rowLayout.marginRight = 5; rowLayout.marginBottom = 5; rowLayout.spacing = 0; shell.setLayout(rowLayout);If you are using the default field values, you only need one line of code:
shell.setLayout(new RowLayout());
RowData, RowLayout snippets, SWT Example: LayoutExample, Sample code and further information
| Modifier and Type | Field and Description |
|---|---|
| public boolean | center
center specifies whether the controls in a row should be centered vertically in each cell for horizontal layouts, or centered horizontally in each cell for vertical layouts. |
| public boolean | fill
fill specifies whether the controls in a row should be all the same height for horizontal layouts, or the same width for vertical layouts. |
| public boolean | justify
justify specifies whether the controls in a row should be fully justified, with any extra space placed between the controls. |
| public int | marginBottom
marginBottom specifies the number of points of vertical margin that will be placed along the bottom edge of the layout. |
| public int | marginHeight
marginHeight specifies the number of points of vertical margin that will be placed along the top and bottom edges of the layout. |
| public int | marginLeft
marginLeft specifies the number of points of horizontal margin that will be placed along the left edge of the layout. |
| public int | marginRight
marginRight specifies the number of points of horizontal margin that will be placed along the right edge of the layout. |
| public int | marginTop
marginTop specifies the number of points of vertical margin that will be placed along the top edge of the layout. |
| public int | marginWidth
marginWidth specifies the number of points of horizontal margin that will be placed along the left and right edges of the layout. |
| public boolean | pack
pack specifies whether all controls in the layout take their preferred size. |
| public int | spacing
spacing specifies the number of points between the edge of one cell and the edge of its neighbouring cell. |
| public int | type
type specifies whether the layout places controls in rows or columns. |
| public boolean | wrap
wrap specifies whether a control will be wrapped to the next row if there is insufficient space on the current row. |
| Access | Constructor and Description |
|---|---|
| public | |
| public |
| Modifier and Type | Method and Description |
|---|---|
| protected Point | computeSize(Composite
a composite widget using this layout composite, int width ( wHint, int SWT.DEFAULT for preferred size)height ( hHint, boolean SWT.DEFAULT for preferred size)true means flush cached layout valuesImplements abstract org. |
| pack-priv Point | |
| protected boolean | flushCache(Control
a control managed by this layout control)Overrides org. control.
|
| pack-priv String | |
| protected void | layout(Composite
a composite widget using this layout composite, boolean true means flush cached layout valuesImplements abstract org. |
| pack-priv Point | |
| pack-priv Point | |
| public String | Returns: a string representation of the layoutOverrides java. |
| center | back to summary |
|---|---|
| public boolean center center specifies whether the controls in a row should be centered vertically in each cell for horizontal layouts, or centered horizontally in each cell for vertical layouts. The default value is false.
| |
| fill | back to summary |
|---|---|
| public boolean fill fill specifies whether the controls in a row should be all the same height for horizontal layouts, or the same width for vertical layouts. The default value is false.
| |
| justify | back to summary |
|---|---|
| public boolean justify justify specifies whether the controls in a row should be fully justified, with any extra space placed between the controls. The default value is false. | |
| marginBottom | back to summary |
|---|---|
| public int marginBottom marginBottom specifies the number of points of vertical margin that will be placed along the bottom edge of the layout. The default value is 3. | |
| marginHeight | back to summary |
|---|---|
| public int marginHeight marginHeight specifies the number of points of vertical margin that will be placed along the top and bottom edges of the layout. The default value is 0.
| |
| marginLeft | back to summary |
|---|---|
| public int marginLeft marginLeft specifies the number of points of horizontal margin that will be placed along the left edge of the layout. The default value is 3. | |
| marginRight | back to summary |
|---|---|
| public int marginRight marginRight specifies the number of points of horizontal margin that will be placed along the right edge of the layout. The default value is 3. | |
| marginTop | back to summary |
|---|---|
| public int marginTop marginTop specifies the number of points of vertical margin that will be placed along the top edge of the layout. The default value is 3. | |
| marginWidth | back to summary |
|---|---|
| public int marginWidth marginWidth specifies the number of points of horizontal margin that will be placed along the left and right edges of the layout. The default value is 0.
| |
| pack | back to summary |
|---|---|
| public boolean pack pack specifies whether all controls in the layout take their preferred size. If pack is false, all controls will have the same size which is the size required to accommodate the largest preferred height and the largest preferred width of all the controls in the layout. The default value is true. | |
| spacing | back to summary |
|---|---|
| public int spacing spacing specifies the number of points between the edge of one cell and the edge of its neighbouring cell. The default value is 3. | |
| type | back to summary |
|---|---|
| public int type type specifies whether the layout places controls in rows or columns. The default value is HORIZONTAL. Possible values are:
| |
| wrap | back to summary |
|---|---|
| public boolean wrap wrap specifies whether a control will be wrapped to the next row if there is insufficient space on the current row. The default value is true. | |
| RowLayout | back to summary |
|---|---|
| public RowLayout() Constructs a new instance of this class with type HORIZONTAL. | |
| RowLayout | back to summary |
|---|---|
| public RowLayout(int type) Constructs a new instance of this class given the type.
| |
| computeSize | back to summary |
|---|---|
| protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) Implements abstract org. Doc from org. Computes and returns the size of the specified composite's client area according to this layout. This method computes the size that the client area of the composite must be in order to position all children at their preferred size inside the composite according to the layout algorithm encoded by this layout. When a width or height hint is supplied, it is used to constrain the result. For example, if a width hint is provided that is less than the width of the client area, the layout may choose to wrap and increase height, clip, overlap, or otherwise constrain the children. | |
| computeSize | back to summary |
|---|---|
| pack-priv Point computeSize(Control control, boolean flushCache) | |
| flushCache | back to summary |
|---|---|
| protected boolean flushCache(Control control) Overrides org. Doc from org. Instruct the layout to flush any cached values
associated with the control specified in the argument
| |
| getName | back to summary |
|---|---|
| pack-priv String getName() | |
| layout | back to summary |
|---|---|
| protected void layout(Composite composite, boolean flushCache) Implements abstract org. Doc from org. Lays out the children of the specified composite according to this layout. This method positions and sizes the children of a composite using the layout algorithm encoded by this layout. Children of the composite are positioned in the client area of the composite. The position of the composite is not altered by this method. When the flush cache hint is true, the layout is instructed to flush any cached values associated with the children. Typically, a layout will cache the preferred sizes of the children to avoid the expense of computing these values each time the widget is laid out. When layout is triggered explicitly by the programmer the flush cache hint is true. When layout is triggered by a resize, either caused by the programmer or by the user, the hint is false. | |
| layoutHorizontal | back to summary |
|---|---|
| pack-priv Point layoutHorizontal(Composite composite, boolean move, boolean wrap, int width, boolean flushCache) | |
| layoutVertical | back to summary |
|---|---|
| pack-priv Point layoutVertical(Composite composite, boolean move, boolean wrap, int height, boolean flushCache) | |
| toString | back to summary |
|---|---|
| public String toString() Overrides java. Returns a string containing a concise, human-readable description of the receiver. | |