Class DefaultColumnGroupHeaderRenderer

All Implemented Interfaces:
IInternalWidget, IRenderer
Direct Known Subclasses:

public class DefaultColumnGroupHeaderRenderer
extends GridHeaderRenderer
The column group header renderer in Grid.
  • Field Details

  • Constructor Details

  • Method Details

    • paint

      public void paint​( gc, java.lang.Object value)
      Paints the visual representation of the given value on the given GC. The actual class of the value object is determined by the use of the implementing class.

      Implementors need to respect the bounds values that may have been specified. The bounds values may affect the x and y values for all drawing operations as well as the width and heights. Implementors may use a Transform to translate the coordinates of all the drawing operations, otherwise they will need to offset each draw.

      gc - GC to paint with
      value - the value being painted
    • computeSize

      public computeSize​( gc, int wHint, int hHint, java.lang.Object value)
      Returns the size of the given value's visual representation.
      gc - convenience GC for string and text extents
      wHint - given width (or SWT.DEFAULT)
      hHint - given height (or SWT.DEFAULT)
      value - value to be sized
      the size
    • notify

      public boolean notify​(int event, point, java.lang.Object value)
      Mechanism used to notify the light weight widgets that an event occurred that it might be interested in.
      event - Event type.
      point - Location of event.
      value - New value.
      widget handled the event.
    • getToggleBounds

      public getToggleBounds()
      Returns the bounds of the toggle within the header (typically only group headers have toggles) or null.
      getToggleBounds in class GridHeaderRenderer
      toggle bounds or null if no toggle exists.
    • setDisplay

      public void setDisplay​(org.eclipse.swt.widgets.Display display)
      Sets the display.
      Specified by:
      setDisplay in interface IRenderer
      setDisplay in class AbstractRenderer
      display - Display.
    • getTextBounds

      public getTextBounds​(java.lang.Object value, boolean preferred)
      Returns the bounds of the text in the cell. This is used when displaying in-place tooltips. If null is returned here, in-place tooltips will not be displayed. If the preferred argument is true then the returned bounds should be large enough to show the entire text. If preferred is false then the returned bounds should be be relative to the current bounds.
      getTextBounds in class GridHeaderRenderer
      value - the object being rendered.
      preferred - true if the preferred width of the text should be returned.
      bounds of the text.