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[platform-swt-dev] Re: Why does SelectionListener fail to fire?
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Hello
I am reposting this in the hope that someone missed it before who can
help,
this is the final piece of the jigsaw and all attempts so far have
failed.
In a separate test, the listener is fired but I can't see why this
example
does not
Thanks
Mike
> I am implementing a 4 table display and am using the example in the
> snippets to synchronise two tables, however when I add a
SelectionListener
> to the ScrolledComposite, it fails to fire when I move the scroll bar.
>
> The code is shown below, it defines 4 tables topLeft, topRight,
bottomLeft
> and bottomRight within a FormLayout.
>
> (As a secondary question, why does bottomLeft fail to extend to the
bottom
> of the Shell despite expandVertical being set to true ?)
>
> Your help would be most appreciated
>
> Thanks
> Mike
>
> import org.eclipse.swt.SWT;
> import org.eclipse.swt.custom.ScrolledComposite;
> import org.eclipse.swt.events.ControlAdapter;
> import org.eclipse.swt.events.ControlEvent;
> import org.eclipse.swt.events.SelectionAdapter;
> import org.eclipse.swt.events.SelectionEvent;
> import org.eclipse.swt.graphics.Rectangle;
> import org.eclipse.swt.layout.FormAttachment;
> import org.eclipse.swt.layout.FormData;
> import org.eclipse.swt.layout.FormLayout;
> import org.eclipse.swt.widgets.Display;
> import org.eclipse.swt.widgets.ScrollBar;
> import org.eclipse.swt.widgets.Shell;
> import org.eclipse.swt.widgets.Table;
> import org.eclipse.swt.widgets.TableColumn;
> import org.eclipse.swt.widgets.TableItem;
>
> public class TableScrollTest {
> TableViewer columnViewer;
> /**
> * @param args
> */
> public static void main(String[] args) {
> TableScrollTest tableScrollTest = new TableScrollTest();
> tableScrollTest.run();
> }
>
> public void run() {
>
> Display display = new Display ();
>
> Shell shell = new Shell (display);
> shell.setSize (900, 400);
>
> FormLayout formLayout = new FormLayout();
> shell.setLayout(formLayout);
>
> // Top left
>
> final Table topLeft = new Table(shell,SWT.SINGLE |
SWT.FULL_SELECTION);
> topLeft.setHeaderVisible(true);
> topLeft.setLinesVisible(true);
> FormData topLeftFormData = new FormData();
> topLeftFormData.width = 244;
> topLeft.setLayoutData(topLeftFormData);
> TableColumn tlColumn1 = new TableColumn(topLeft,SWT.LEFT);
> tlColumn1.setWidth(200);
> TableColumn tlColumn2 = new TableColumn(topLeft,SWT.LEFT);
> tlColumn2.setWidth(60);
> for (int i=0; i<2; i++) {
> new TableItem (topLeft, SWT.NONE);
> }
> topLeft.pack();
> // Top right
>
> final ScrolledComposite trScroller = new ScrolledComposite (shell,
> SWT.H_SCROLL );
> FormLayout trFormLayout = new FormLayout();
> trScroller.setLayout(trFormLayout);
> trScroller.setExpandHorizontal(true);
> final FormData trScrollerFormData = new FormData();
> trScrollerFormData.left = new FormAttachment(topLeft, 5);
> trScrollerFormData.top = new FormAttachment(0);
> trScrollerFormData.width = shell.getClientArea().width -
> topLeft.getSize().x - 5;
> trScroller.setLayoutData(trScrollerFormData);
> final Table topRight = new Table(trScroller,SWT.SINGLE|
> SWT.FULL_SELECTION | SWT.HIDE_SELECTION );
> topRight.setHeaderVisible(true);
> topRight.setLinesVisible(false);
> for (int i = 0; i < 10; i++) {
> TableColumn tableColumn = new TableColumn(topRight,SWT.CENTER);
> tableColumn.setWidth(80);
> }
>
> for (int i=0; i<2; i++) {
> new TableItem (topRight, SWT.NONE);
> }
>
> topRight.pack();
> final FormData trFormData = new FormData();
> trFormData.left = new FormAttachment(0, 0);
> trFormData.top = new FormAttachment(0);
> trFormData.width = shell.getClientArea().width -
topLeft.getSize().x -
> 5;
> topRight.setLayoutData(trFormData);
>
> trScroller.setContent(topRight);
>
>
> // Bottom Left
>
> final ScrolledComposite blScroller = new ScrolledComposite (shell,
> SWT.V_SCROLL);
> blScroller.setExpandVertical(true);
> final FormData blScrollerFormData = new FormData();
> blScrollerFormData.left = new FormAttachment(0, 5);
> blScrollerFormData.top = new FormAttachment(topLeft, 5);
> blScrollerFormData.width = 244;
> blScroller.setLayoutData(blScrollerFormData);
> final Table bottomLeft = new Table(blScroller,SWT.SINGLE |
> SWT.FULL_SELECTION);
> bottomLeft.setHeaderVisible(true);
> bottomLeft.setLinesVisible(true);
> TableColumn blColumn1 = new TableColumn(bottomLeft,SWT.LEFT);
> blColumn1.setWidth(200);
> TableColumn blColumn2 = new TableColumn(bottomLeft,SWT.LEFT);
> blColumn2.setWidth(60);
> for (int i=0; i<12; i++) {
> TableItem item = new TableItem (bottomLeft, SWT.NONE);
> item.setText(new String[] {"Row " , String.valueOf(i)});
> }
> bottomLeft.pack();
> FormData blFormData = new FormData();
> blFormData.width = 244;
> blFormData.left = new FormAttachment(0, 0);
> blFormData.top = new FormAttachment(0);
> bottomLeft.setLayoutData(blFormData);
> blScroller.setContent(bottomLeft);
>
> // Bottom right
>
> final ScrolledComposite brScroller = new ScrolledComposite (shell,
> SWT.NONE);
> brScroller.setExpandHorizontal(true);
> brScroller.setExpandVertical(true);
> final Table bottomRight = new Table(brScroller,SWT.SINGLE|
> SWT.FULL_SELECTION | SWT.HIDE_SELECTION );
> bottomRight.setHeaderVisible(false);
> bottomRight.setLinesVisible(true);
> for (int i = 0; i < 10; i++) {
> TableColumn tableColumn = new
TableColumn(bottomRight,SWT.CENTER);
> tableColumn.setWidth(80);
> }
>
> for (int i=0; i<12; i++) {
> TableItem item = new TableItem (bottomRight, SWT.NONE);
> String [] line = new String[10];
> for (int j = 0; j < line.length; j++) {
> line[j] = String.valueOf(i*10+j);
> }
> item.setText(line);
> }
>
> bottomRight.pack();
> final FormData brFormData = new FormData();
> brFormData.left = new FormAttachment(blScroller, 5);
> brFormData.top = new FormAttachment(trScroller, 0);
> brFormData.width = shell.getClientArea().width -
topLeft.getSize().x -
> 5;
> brScroller.setLayoutData(brFormData);
> brScroller.setContent(bottomRight);
>
>
> shell.addControlListener(new ControlAdapter() {
> public void controlResized(ControlEvent event) {
> Shell shell = (Shell)event.getSource();
> Rectangle rect = shell.getClientArea();
> trFormData.width = rect.width - topLeft.getSize().x - 5;
> trScrollerFormData.width = rect.width - topLeft.getSize().x -
5;
> brFormData.width = rect.width - topLeft.getSize().x - 5;
> brFormData.height = rect.height - topRight.getSize().y - 5;
> shell.layout();
> }
> });
>
>
> final ScrollBar trScrollBar = trScroller.getHorizontalBar();
> trScrollBar.addSelectionListener( new SelectionAdapter () {
> public void widgetSelected (SelectionEvent e) {
>
> // >>>> This does not fire <<<<
> System.out.println("trScrollBar " + trScrollBar.getSelection ()
+ "
> " + trScrollBar.getSelection ());
> brScroller.setOrigin(trScrollBar.getSelection(), 0);
> }
> });
>
> final ScrollBar brScrollBar = trScroller.getHorizontalBar();
> brScrollBar.addSelectionListener( new SelectionAdapter () {
> public void widgetSelected (SelectionEvent e) {
>
> // >>>> This does not fire <<<<
> System.out.println("brScrollBar " + brScrollBar.getSelection ()
+ "
> " + brScrollBar.getSelection ());
> brScroller.setOrigin(trScrollBar.getSelection(), 0);
> }
> });
>
> shell.open ();
>
> Rectangle rect = shell.getClientArea();
> trFormData.width = rect.width - topLeft.getSize().x - 5;
> trScrollerFormData.width = rect.width - topLeft.getSize().x - 5;
> brFormData.width = rect.width - topLeft.getSize().x - 5;
> brFormData.height = rect.height - topRight.getSize().y - 5;
> shell.layout();
>
> while (!shell.isDisposed ()) {
> if (!display.readAndDispatch ()) display.sleep ();
> }
> display.dispose ();
> }
> }
>
