Examples of org.eclipse.swt.widgets.ScrollBar.addSelectionListener()

org.eclipse.swt.widgets.ScrollBar.addSelectionListener()
Adds the listener to the collection of listeners who will be notified when the user changes the receiver's value, by sending it one of the messages defined in the SelectionListener interface.
When widgetSelected is called, the event object detail field contains one of the following values: SWT.NONE - for the end of a drag. SWT.DRAG. SWT.HOME. SWT.END. SWT.ARROW_DOWN. SWT.ARROW_UP. SWT.PAGE_DOWN. SWT.PAGE_UP. widgetDefaultSelected is not called.
@param listener the listener which should be notified when the user changes the receiver's value @exception IllegalArgumentException
- ERROR_NULL_ARGUMENT - if the listener is null
@exception SWTException
- ERROR_WIDGET_DISPOSED - if the receiver has been disposed
- ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
@see SelectionListener @see #removeSelectionListener @see SelectionEvent

    // Set up the image canvas scroll bars.
    ScrollBar horizontal = imageCanvas.getHorizontalBar();
    horizontal.setVisible(true);
    horizontal.setMinimum(0);
    horizontal.setEnabled(false);
    horizontal.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        scrollHorizontally((ScrollBar) event.widget);
      }
    });
    ScrollBar vertical = imageCanvas.getVerticalBar();

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    });
    ScrollBar vertical = imageCanvas.getVerticalBar();
    vertical.setVisible(true);
    vertical.setMinimum(0);
    vertical.setEnabled(false);
    vertical.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        scrollVertically((ScrollBar) event.widget);
      }
    });

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    vertical = paletteCanvas.getVerticalBar();
    vertical.setVisible(true);
    vertical.setMinimum(0);
    vertical.setIncrement(10);
    vertical.setEnabled(false);
    vertical.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        scrollPalette((ScrollBar) event.widget);
      }
    });

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      }
    });
    ScrollBar bar = canvas.getHorizontalBar();
    if (bar != null) {
      hookListeners(bar);
      bar.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent event) {
          scrollHorizontal((ScrollBar) event.widget);
        }
      });
    }

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      });
    }
    bar = canvas.getVerticalBar();
    if (bar != null) {
      hookListeners(bar);
      bar.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent event) {
          scrollVertical((ScrollBar) event.widget);
        }
      });
    }

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    });


    /* Set up the paint canvas scroll bars */
    ScrollBar horizontal = paintCanvas.getHorizontalBar();
    horizontal.setVisible(true);
    horizontal.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        scrollHorizontally((ScrollBar) event.widget);
      }
    });
    ScrollBar vertical = paintCanvas.getVerticalBar();

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        scrollHorizontally((ScrollBar) event.widget);
      }
    });
    ScrollBar vertical = paintCanvas.getVerticalBar();
    vertical.setVisible(true);
    vertical.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        scrollVertically((ScrollBar) event.widget);
      }
    });
    handleResize();

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        fSubjectControl.addKeyListener(this);
        if (fSubjectControl instanceof Scrollable) {
          Scrollable scrollable= (Scrollable) fSubjectControl;
          ScrollBar vBar= scrollable.getVerticalBar();
          if (vBar != null)
            vBar.addSelectionListener(this);
          ScrollBar hBar= scrollable.getHorizontalBar();
          if (hBar != null)
            hBar.addSelectionListener(this);
        }

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          ScrollBar vBar= scrollable.getVerticalBar();
          if (vBar != null)
            vBar.addSelectionListener(this);
          ScrollBar hBar= scrollable.getHorizontalBar();
          if (hBar != null)
            hBar.addSelectionListener(this);
        }


        fDisplay= fSubjectControl.getDisplay();
        if (!fDisplay.isDisposed()) {
          fDisplay.addFilter(SWT.Activate, this);

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