Bug 15054

Comment 1 Mike Wilson 2002-05-02 10:28:33 EDT

I would like to see this happen as well. Unfortunately, we will not have time 
to do this for R2.0. We would need to investigate both the potential ways this 
could be used by the UI team, as well as the underlying support on all the 
operating systems which use native tables (Carbon (?), GTK(?), etc.) before 
deciding on an API. Then we would actually have to implement this API 
everywhere (including in the emulated implementation for photon and 
linux/motif). Given how little free time there is, and the fact that the UI 
team probably would not be able to respond to the changes at this point, it 
will have to wait.

If you want to get involved with implementing this yourself, you should start 
a discussion on the platform-swt-dev mailing list with the results of 
investigating the support on the various platforms, plus your suggested API.

Comment 2 Konstantin Scheglov 2002-05-16 01:24:27 EDT

Here is source code for Windows.

/**
 * @author Kosta
 */
package org.eclipse.swt.widgets;
import org.eclipse.jface.viewers.ITableLabelProvider;
//
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
public class TableVirtual extends Table {
	private ITableLabelProvider m_LabelProvider;
	public TableVirtual(Composite parent, int style) {
		super(parent, checkStyle(style));
	}
	public void setLabelProvider(ITableLabelProvider labelProvider) {
		m_LabelProvider = labelProvider;
	}
	int widgetStyle() {
		int bits = super.widgetStyle();
		bits |= 0x1000;
		return bits;
	}
	void createItem(TableItem item, int index) {
	}
	public void createItems(int cnt) {
		items = new TableItem[cnt];
		for (int i = 0; i < cnt; i++) {
			LVITEM lvItem = new LVITEM();
			lvItem.iItem = i;
			lvItem.iImage = OS.I_IMAGENONE;
			lvItem.mask = OS.LVIF_IMAGE;
			//
			items[i] = new TableItem(this, SWT.NONE);
		}
		//
		OS.SendMessage(handle, 0x1000 + 47, cnt, 0);
	}
	LRESULT wmNotifyChild(int wParam, int lParam) {
		NMHDR hdr = new NMHDR();
		OS.MoveMemory(hdr, lParam, NMHDR.sizeof);
		switch (hdr.code) {
			case 0xFFFFFF4F :
				{
					NMLISTVIEW pnmlv = new NMLISTVIEW();
					OS.MoveMemory(pnmlv, lParam, 
NMLISTVIEW.sizeof);
					//
					int item = pnmlv.iSubItem;
					int subItem = pnmlv.uNewState;
					// for image support I need to change 
SWT native library
					/*if ((pnmlv.iItem & OS.LVIF_IMAGE) != 
0) {
						if ((m_LabelProvider != null) 
&& (subItem == 0)) {
							Image image = 
m_LabelProvider.getColumnImage(new Integer(item), subItem);
							pnmlv.lParam = 
imageIndex(image);
							OS.MoveMemory(lParam, 
pnmlv, NMLISTVIEW.sizeof);
						}
					}*/
					if ((pnmlv.iItem & OS.LVIF_TEXT) != 0) {
						String string;
						if (m_LabelProvider != null)
							string = 
m_LabelProvider.getColumnText(new Integer(item), subItem);
						else
							string = "";
						TCHAR buffer = new TCHAR
(getCodePage(), string, true);
						int byteCount = buffer.length() 
* TCHAR.sizeof;
						OS.MoveMemory(pnmlv.x, buffer, 
byteCount);
					}
				}
		} // switch
		return super.wmNotifyChild(wParam, lParam);
	}
	public void selectItem(int item) {
		int state = OS.SendMessage(handle, OS.LVM_GETITEMSTATE, item, 
OS.LVIS_SELECTED | OS.LVIS_FOCUSED);
		LVITEM lvItem = new LVITEM();
		lvItem.mask = OS.LVIF_STATE;
		lvItem.stateMask = OS.LVIS_SELECTED | OS.LVIS_FOCUSED;
		lvItem.state |= OS.LVIS_SELECTED | OS.LVIS_FOCUSED;
		OS.SendMessage(handle, OS.LVM_SETITEMSTATE, item, lvItem);
	}
}

Comment 3 Mike Wilson 2002-05-16 11:10:25 EDT

We should consider this for R3.0.

Comment 4 Veronika Irvine 2002-09-11 14:06:38 EDT

Moving from Later.

Comment 5 Michael Scharf 2003-06-18 22:30:12 EDT

Created attachment 5236 [details]
An improved version of TableVirtual

- much smaller memory footprint (no TableItems allocated for each row)
- allows images for any column

Comment 6 Michael Scharf 2003-06-18 22:31:24 EDT

Created attachment 5237 [details]
A simple test application to show a virtual table with 1000,000 rows

Comment 7 Ed Burnette 2003-06-19 11:19:51 EDT

See also bug 36226 .

Comment 8 Eric Yokeley 2004-02-10 17:03:49 EST

What's the status of this PR?  Are thre plans for including some sort of 
virtual table in Eclipse 3.0?

Comment 9 Steve Northover 2004-02-11 10:38:33 EST

We are hoping to get this into 3.0 but might not make it.

Comment 10 Steve Northover 2004-03-17 18:01:56 EST

Fixed > 20040317

Investigate SWT.VIRTUAL, SWT.SetData, Table.setItemCount() and Table.clear(). 
There is a chance we will be changing some of this behavior between now and 
3.0.  Good luck!

Comment 11 Steve Northover 2004-03-17 18:02:16 EST

Really fixed.

Comment 12 Steve Northover 2004-06-23 12:43:47 EDT

NOTE: DO NOT USE ANY OF THE CODE THAT IS ATTACHED TO THIS BUG REPORT.  The 
virtual table is supported as a style for the regular table.