Class SourceViewer.RulerLayout

  • Enclosing class:
    SourceViewer

    protected class SourceViewer.RulerLayout
    extends Layout
    Layout of a source viewer. Vertical ruler, text widget, and overview ruler are shown side by side.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected int fGap
      The gap between the text viewer and the vertical ruler.
    • Constructor Summary

      Constructors 
      Constructor Description
      RulerLayout​(int gap)
      Creates a new ruler layout with the given gap between text viewer and vertical ruler.
    • Field Detail

      • fGap

        protected int fGap
        The gap between the text viewer and the vertical ruler.
    • Constructor Detail

      • RulerLayout

        public RulerLayout​(int gap)
        Creates a new ruler layout with the given gap between text viewer and vertical ruler.
        Parameters:
        gap - the gap between text viewer and vertical ruler
    • Method Detail

      • computeSize

        protected Point computeSize​(Composite composite,
                                    int wHint,
                                    int hHint,
                                    boolean flushCache)
        Description copied from class: Layout
        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.

        Specified by:
        computeSize in class Layout
        Parameters:
        composite - a composite widget using this layout
        wHint - width (SWT.DEFAULT for preferred size)
        hHint - height (SWT.DEFAULT for preferred size)
        flushCache - true means flush cached layout values
        Returns:
        a point containing the computed size (width, height)
        See Also:
        Layout.layout(org.eclipse.swt.widgets.Composite, boolean), Control.getBorderWidth(), Control.getBounds(), Control.getSize(), Control.pack(boolean), "computeTrim, getClientArea for controls that implement them"
      • layout

        protected void layout​(Composite composite,
                              boolean flushCache)
        Description copied from class: Layout
        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.

        Specified by:
        layout in class Layout
        Parameters:
        composite - a composite widget using this layout
        flushCache - true means flush cached layout values