Create fake tooltips for items in a SWT table
/*
* Tool Tips example snippet:
*
* For a list of all SWT example snippets see
* http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;
public class Snippet125 {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.BORDER);
for (int i = 0; i < 20; i++) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText("item " + i);
}
// Disable native tooltip
table.setToolTipText("");
// Implement a "fake" tooltip
final Listener labelListener = new Listener() {
public void handleEvent(Event event) {
Label label = (Label) event.widget;
Shell shell = label.getShell();
switch (event.type) {
case SWT.MouseDown:
Event e = new Event();
e.item = (TableItem) label.getData("_TABLEITEM");
// Assuming table is single select, set the selection as if
// the mouse down event went through to the table
table.setSelection(new TableItem[] { (TableItem) e.item });
table.notifyListeners(SWT.Selection, e);
// fall through
case SWT.MouseExit:
shell.dispose();
break;
}
}
};
Listener tableListener = new Listener() {
Shell tip = null;
Label label = null;
public void handleEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
case SWT.KeyDown:
case SWT.MouseMove: {
if (tip == null)
break;
tip.dispose();
tip = null;
label = null;
break;
}
case SWT.MouseHover: {
TableItem item = table.getItem(new Point(event.x, event.y));
if (item != null) {
if (tip != null && !tip.isDisposed())
tip.dispose();
tip = new Shell(shell, SWT.ON_TOP | SWT.TOOL);
tip.setLayout(new FillLayout());
label = new Label(tip, SWT.NONE);
label.setForeground(display
.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
label.setBackground(display
.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
label.setData("_TABLEITEM", item);
label.setText("tooltip " + item.getText());
label.addListener(SWT.MouseExit, labelListener);
label.addListener(SWT.MouseDown, labelListener);
Point size = tip.computeSize(SWT.DEFAULT, SWT.DEFAULT);
Rectangle rect = item.getBounds(0);
Point pt = table.toDisplay(rect.x, rect.y);
tip.setBounds(pt.x, pt.y, size.x, size.y);
tip.setVisible(true);
}
}
}
}
};
table.addListener(SWT.Dispose, tableListener);
table.addListener(SWT.KeyDown, tableListener);
table.addListener(SWT.MouseMove, tableListener);
table.addListener(SWT.MouseHover, tableListener);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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