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Bugzilla – Attachment 272645 Details for
Bug 531048
[GTK3] Large problems drawing ownerdraw tables
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Sample code to reproduce
VirtualOwnerDrawnTable.java (text/plain), 3.26 KB, created by
Thomas Singer
on 2018-02-12 09:12:16 EST
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Description:
Sample code to reproduce
Filename:
MIME Type:
Creator:
Thomas Singer
Created:
2018-02-12 09:12:16 EST
Size:
3.26 KB
patch
obsolete
>import org.eclipse.swt.*; >import org.eclipse.swt.events.*; >import org.eclipse.swt.graphics.*; >import org.eclipse.swt.layout.*; >import org.eclipse.swt.widgets.*; > >/** > * @author Thomas Singer > */ >public class VirtualOwnerDrawnTable { > > // Constants ============================================================== > > static final int COUNT1 = 10000; > static final int COUNT2 = 100; > > private static boolean packPending = true; > > // Static ================================================================= > > public static void main(String[] args) { > final Display display = new Display(); > final Shell shell = new Shell(display); > shell.setLayout(new FillLayout(SWT.VERTICAL)); > > final Button button = new Button(shell, SWT.NONE); > final Table table = new Table(shell, SWT.VIRTUAL | SWT.BORDER | SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL); > button.setText("Change content"); > button.addSelectionListener(new SelectionAdapter() { > @Override > public void widgetSelected(SelectionEvent e) { > table.setItemCount(table.getItemCount() == COUNT1 ? COUNT2 : COUNT1); > } > }); > > table.setHeaderVisible(true); > final Listener listener = new Listener() { > @Override > public void handleEvent(Event event) { > final TableItem item = (TableItem)event.item; > if (event.type == SWT.EraseItem) { > if (event.index < 2) { > event.detail &= ~SWT.FOREGROUND; > } > } > else if (event.type == SWT.PaintItem) { > final String text = (String)item.getData(); > if (event.index == 0) { > event.gc.drawText(text, event.x, event.y, true); > } > else if (event.index == 1) { > final Point size = event.gc.textExtent(text); > final Rectangle bounds = item.getBounds(event.index); > event.gc.drawText(text, bounds.x + bounds.width - size.x, bounds.y + bounds.height - size.y, true); > } > } > else if (event.type == SWT.MeasureItem) { > final String text = (String)item.getData(); > final Point point = event.gc.textExtent(text); > event.height = point.y * 2; > event.width = Math.max(event.width, point.x); > } > else if (event.type == SWT.SetData) { > final int index = table.indexOf(item); > final String data = "Item " + index; > item.setText(2, data); > item.setData(data); > > if (packPending) { > packPending = false; > display.asyncExec(new Runnable() { > @Override > public void run() { > table.setRedraw(false); > for (TableColumn column : table.getColumns()) { > column.pack(); > } > table.setRedraw(true); > } > }); > } > } > } > }; > table.addListener(SWT.EraseItem, listener); > table.addListener(SWT.SetData, listener); > table.addListener(SWT.MeasureItem, listener); > table.addListener(SWT.PaintItem, listener); > > createColumn(SWT.LEFT, "OD Left", table); > createColumn(SWT.RIGHT, "OD Right", table); > createColumn(SWT.LEFT, "Primitive", table); > > table.setItemCount(COUNT1); > table.setTopIndex(1000); > > shell.setSize(400, 500); > shell.open(); > > while (!shell.isDisposed()) { > if (!display.readAndDispatch()) { > display.sleep(); > } > } > display.dispose(); > } > > private static void createColumn(int style, String text, Table table) { > final TableColumn tableColumn = new TableColumn(table, style); > tableColumn.setText(text); > tableColumn.setMoveable(true); > } >}
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bug 531048
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