Composite#setLayout(Layout), Sample code and further information
| Access | Constructor and Description |
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| public |
| Modifier and Type | Method and Description |
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| protected abstract Point | Returns: a point containing the computed size (width, height)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 valuesComputes and returns the size of the specified composite's client area according to this layout. |
| protected boolean | Returns: true if the Layout has flushed all cached information associated with controla control managed by this layout control)Instruct the layout to flush any cached values
associated with the control specified in the argument
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| protected abstract void |
| Layout | back to summary |
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| public Layout() | |
| computeSize | back to summary |
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| protected abstract Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) 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.
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| flushCache | back to summary |
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| protected boolean flushCache(Control control) Instruct the layout to flush any cached values
associated with the control specified in the argument
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| layout | back to summary |
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| protected abstract void layout(Composite composite, boolean flushCache) 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.
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