Home » Eclipse Projects » Nebula » Custom data model for cells in grid
| Custom data model for cells in grid [message #41367] |
Wed, 24 October 2007 12:46  |
Eclipse User |
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Originally posted by: svo.ciklum.net
Hi!
As far as I see, we are bound to String when using Grid (even through
GridViewer), cause GridItem uses text as cell values. Is there any way
to set custom objects as cell values? This is important for our project,
as we are using different datatypes in cells.
Regards,
Stanislav
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| Re: Custom data model for cells in grid [message #41430 is a reply to message #41398] |
Wed, 24 October 2007 14:16  |
| Eclipse User |
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Originally posted by: svo.ciklum.net
Yes, I understand the architecture. But can we draw custom content using
label providers with GridViewer?
Regards,
Stanislav
> What is a "Object", with Viewers normally the LabelProvider makes a
> String/Image presentation from the model-object, what else can you
> display to the user?
>
> Tom
>
> Stanislav Vodetskyi schrieb:
>> Hi!
>>
>> As far as I see, we are bound to String when using Grid (even through
>> GridViewer), cause GridItem uses text as cell values. Is there any way
>> to set custom objects as cell values? This is important for our
>> project, as we are using different datatypes in cells.
>>
>> Regards,
>> Stanislav
>
>
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| Re: Custom data model for cells in grid [message #41460 is a reply to message #41430] |
Wed, 24 October 2007 14:58 |
 Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
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Hi,
I suppose you need to create your own cell renderer. For SWT-Tables we
provide LabelProviders who use OwnerDraw at least from Viewers-Point of
view we could invent something like this also for GridViewer but I don't
know enough about the internals of the Grid-implementation.
Tom
Stanislav Vodetskyi schrieb:
> Yes, I understand the architecture. But can we draw custom content using
> label providers with GridViewer?
> Regards,
> Stanislav
>
>> What is a "Object", with Viewers normally the LabelProvider makes a
>> String/Image presentation from the model-object, what else can you
>> display to the user?
>>
>> Tom
>>
>> Stanislav Vodetskyi schrieb:
>>> Hi!
>>>
>>> As far as I see, we are bound to String when using Grid (even through
>>> GridViewer), cause GridItem uses text as cell values. Is there any
>>> way to set custom objects as cell values? This is important for our
>>> project, as we are using different datatypes in cells.
>>>
>>> Regards,
>>> Stanislav
>>
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
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| Re: Custom data model for cells in grid [message #41562 is a reply to message #41460] |
Wed, 24 October 2007 15:25 |
Chris Gross
Messages: 253
Registered: July 2009 |
Senior Member |
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As Tom said you could write your own cell renderer. I'd be interested
to see a screenshot of what you are trying to achieve.
Regards,
-Chris
Tom Schindl wrote:
> Hi,
>
> I suppose you need to create your own cell renderer. For SWT-Tables we
> provide LabelProviders who use OwnerDraw at least from Viewers-Point of
> view we could invent something like this also for GridViewer but I don't
> know enough about the internals of the Grid-implementation.
>
> Tom
>
> Stanislav Vodetskyi schrieb:
>> Yes, I understand the architecture. But can we draw custom content
>> using label providers with GridViewer?
>> Regards,
>> Stanislav
>>
>>> What is a "Object", with Viewers normally the LabelProvider makes a
>>> String/Image presentation from the model-object, what else can you
>>> display to the user?
>>>
>>> Tom
>>>
>>> Stanislav Vodetskyi schrieb:
>>>> Hi!
>>>>
>>>> As far as I see, we are bound to String when using Grid (even
>>>> through GridViewer), cause GridItem uses text as cell values. Is
>>>> there any way to set custom objects as cell values? This is
>>>> important for our project, as we are using different datatypes in
>>>> cells.
>>>>
>>>> Regards,
>>>> Stanislav
>>>
>>>
>
>
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| Re: Custom data model for cells in grid [message #41659 is a reply to message #41562] |
Wed, 24 October 2007 16:24 |
| Eclipse User |
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Originally posted by: svo.ciklum.net
Thanks for quick response!
We would try using OwnerDraw. I'll send you the screenshot as soon as we
achieve some solid results :)
We actually want to use combo-box as editor, and need renderer to look
like combo too - that leads to the need for custom drawing. Perhaps you
can advise some easier way? :)
Regards,
Stanislav
> As Tom said you could write your own cell renderer. I'd be interested
> to see a screenshot of what you are trying to achieve.
>
> Regards,
> -Chris
>
> Tom Schindl wrote:
>> Hi,
>>
>> I suppose you need to create your own cell renderer. For SWT-Tables we
>> provide LabelProviders who use OwnerDraw at least from Viewers-Point
>> of view we could invent something like this also for GridViewer but I
>> don't know enough about the internals of the Grid-implementation.
>>
>> Tom
>>
>> Stanislav Vodetskyi schrieb:
>>> Yes, I understand the architecture. But can we draw custom content
>>> using label providers with GridViewer?
>>> Regards,
>>> Stanislav
>>>
>>>> What is a "Object", with Viewers normally the LabelProvider makes a
>>>> String/Image presentation from the model-object, what else can you
>>>> display to the user?
>>>>
>>>> Tom
>>>>
>>>> Stanislav Vodetskyi schrieb:
>>>>> Hi!
>>>>>
>>>>> As far as I see, we are bound to String when using Grid (even
>>>>> through GridViewer), cause GridItem uses text as cell values. Is
>>>>> there any way to set custom objects as cell values? This is
>>>>> important for our project, as we are using different datatypes in
>>>>> cells.
>>>>>
>>>>> Regards,
>>>>> Stanislav
>>>>
>>>>
>>
>>
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| Re: Custom data model for cells in grid [message #42525 is a reply to message #41690] |
Mon, 29 October 2007 20:16 |
| Eclipse User |
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Originally posted by: svo.maconomy.dk
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Hi
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I've been playing with GridCellRenderer for some time, and couldn't
make it work under windows. I'm posting a snippet here, that works
perfectly on Mac OS X.
It also illustrates windows problems perfectly.
The class we need is ComboCellRenderer. I left some comments in the
code, to point out main problems.
- we have to hide snapshot shell from user. That is done by setting
it's location to [-100,-100] - works perfectly on mac, but not on
windows. On windows XP, when trying to get the snapshot from a shell,
located beyond the screen, we get blank area.
-in the computeSize() method we need to know the size of the cell - to
fit our combobox. This can be achieved, but requires some tricky
loopback.
To make it work on windows (if you run the snippet "as is" it will fall
into infinite loop under win xp) you need to replace renderer's
constructor with the following:
public ComboCellRenderer(Grid grid) {
this.grid = grid;
shell = new Shell(grid.getShell(), SWT.NO_TRIM);
// or use:
// shell = new Shell(grid.getDisplay(), SWT.NO_TRIM);
combo = new Combo(shell, SWT.DROP_DOWN);
combo.setLocation(0, 0);
// hide the snapshot shell from user - will not work under win xp
// platform.
// will have to find some other way round this on windows.
// shell.setLocation(-100, -100);
shell.open();
// shell.setVisible(false);
}
It will not work on mac properly with this constructor, neither with
grid.getShell() (falling into infinite loop) nor with grid.getDisplay()
(a little better, but still not good).
As you can see, shell's setLocation() method is commented - otherwise,
nothing will be drawn in a cell. I also had to comment
shell.setVisible(false) to make it work. It is not critical at all, and
can be commented on mac too, but I like when it's present
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Finally, you can pass either grid.getShell() to the shell constructor,
or grid.getDisplay(). In the latter case, if you move a window over
that shell, it won't be visible.
So, as you can see, the main difficulty is that we cannot hide the
snapshot shell from user on windows XP, plus there is minor difficulty
with getting cell size. Would like to hear your thoughts on how to
achieve it. Thanks in advance
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In fact, what we really need and dream of is a cell renderer, that can
take Control as an argument and paint it on screen - like it is done in
Swing
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----------------14973145151600932445
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
, because right now we will have to reimplement all basic cell
rendering, as DefaultCellRenderer cannot be extended. Are you planning
to implement something like this in near future?
**************************************
the snippet:
**************************************
package snippets;
import java.util.ArrayList;
import java.util.Random;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.nebula.jface.gridviewer.GridTableViewer;
import org.eclipse.nebula.jface.gridviewer.GridViewerColumn;
import org.eclipse.nebula.widgets.grid.Grid;
import org.eclipse.nebula.widgets.grid.GridCellRenderer;
import org.eclipse.nebula.widgets.grid.GridItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* Snippet for demonstrating combo box rendering.
*
* @author svo
*
*/
public class SnippetComboRenderer {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setLocation(100, 100);
shell.setSize(400, 400);
// create composite
final Composite composite = new Composite(shell, SWT.NONE);
composite.setLayout(new FillLayout());
//create table viewer
final GridTableViewer tableViewer = new GridTableViewer(composite);
final GridViewerColumn column = new GridViewerColumn(tableViewer, SWT.NONE);
column.getColumn().setText("Column1");
column.getColumn().setWidth(200);
column.getColumn().setCellRenderer(new
ComboCellRenderer(tableViewer.getGrid()));
tableViewer.setLabelProvider(new TableLabelProvider());
tableViewer.setContentProvider(new ArrayContentProvider());
tableViewer.getGrid().setCellSelectionEnabled(true);
tableViewer.setInput(new TableInput(
----------------14973145151600932445
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);
tableViewer.getGrid().setLinesVisible(true);
tableViewer.getGrid().setHeaderVisible(true);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
@SuppressWarnings("serial")
static class TableInput extends ArrayList<String[]> {
private final String[] values = {"Noise", "Electronic", "Experimental",
"Industrial"};
public TableInput(final int size) {
final Random random = new Random();
for (int i = 0; i<size; i++) {
add(new String[] {values[random.nextInt(values.length-1)]});
}
}
}
static class TableLabelProvider extends LabelProvider implements
ITableLabelProvider{
@Override
public Image getColumnImage(Object element, int columnIndex) {
return null;
}
@Override
public String getColumnText(Object element, int columnIndex) {
final String[] row = (String[]) element;
return row[columnIndex];
}
}
static class ComboCellRenderer extends GridCellRenderer {
private final Grid grid;
private final Combo combo;
private final Shell shell;
public ComboCellRenderer(Grid grid) {
this.grid = grid;
shell = new Shell(grid.getDisplay(), SWT.NO_TRIM);
combo = new Combo(shell,SWT.DROP_DOWN);
combo.setLocation(0, 0);
//hide the snapshot shell from user - will not work under win xp platform.
//will have to find some other way round this on windows.
shell.setLocation(-100, -100);
shell.open();
shell.setVisible(false);
}
@Override
public boolean notify(int event, Point point, Object value) {
return false;
}
@Override
public Point computeSize(GC gc, int hint, int hint2, Object value) {
final Point rendererSize = getSize();
//renderer size is [0,0]. Need to get to know cell size somehow.
//we can get it from grid, but this kind of loopback is not very good
looking (plus, it won't always return correct item height)
//but it works, in fact
----------------14973145151600932445
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----------------14973145151600932445
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final Point comboSize = combo.computeSize(hint, hint2);
final Point gridCellSize = new
Point(grid.getColumn(getColumn()).getWidth(),
Math.max(grid.getItemHeight(),comboSize.y));
combo.setSize(gridCellSize);
return combo.getSize();
}
@Override
public void paint(GC gc, Object value) {
final GridItem item = (GridItem) value;
System.out.println(item.getText(getColumn()));
combo.setItems(new String[] {item.getText(getColumn())});
combo.select(0);
shell.setSize(combo.getSize());
gc.drawImage(takeSnapshot(), getBounds().x, getBounds().y);
}
private Image takeSnapshot() {
shell.setVisible(true);
final Image image = new Image(shell.getDisplay(), getBounds().width,
getBounds().height);
final GC gc = new GC(combo);
gc.copyArea(image, 0, 0);
shell.setVisible(false);
gc.dispose();
return image;
}
}
}
***********************************
Regards,
Stanislav
Tom Schindl ><tom.schindl@bestsolution.at> wrote:
>Stanislav Vodetskyi schrieb:
>> Thanks for quick response!
>> We would try using OwnerDraw. I'll send you the screenshot as soon as we
>> achieve some solid results
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----------------14973145151600932445
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>> We actually want to use combo-box as editor, and need renderer to look
>> like combo too - that leads to the need for custom drawing. Perhaps you
>> can advise some easier way?
----------------14973145151600932445
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>>
>
>That's fairly easy make a screenshot on the fly from the Combo and set
>the icon onto cell
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I'm doing this with Checkboxes and it works
>fairly well [1].
>
>Please don't mix things:
>- OwnerDraw is specific to SWT-Tables/Trees you won't have any luck
> using it with Grid
>- CellRenders are the Grid-way of drawing custom things into
> a cell
>
>Tom
>
>[1]http://tom-eclipse-dev.blogspot.com/2007_01_01_archive.html
>
>--
>B e s t S o l u t i o n . at
> ------------------------------------------------------------ --------
>Tom Schindl JFace-Committer
> ------------------------------------------------------------ --------
--
----------------14973145151600932445--
|
|
| |
| Re: Custom data model for cells in grid [message #42587 is a reply to message #42556] |
Tue, 30 October 2007 09:58 |
| Eclipse User |
|
|
|
Originally posted by: svo.ciklum.net
Hi,
Thanks, strangely I didn't notice it myself. One more thing - it would
be cool, if we could draw snapshot of the focused combobox - right now
it's grayed, cause we take snapshot of the background window. Setting
focus directly in the paint method is not good. Is there any way to
force component look like it is active?
Also still don't know how to hide snapshot shell on windows xp.
Thanks in advance :)
Regards,
Stanislav
Tom Schindl wrote:
> Hi,
>
> just one note you are leaking resources like hell because you are not
> disposing images you create.
>
> Tom
>
|
|
| | | |
| Re: Custom data model for cells in grid [message #585475 is a reply to message #41430] |
Wed, 24 October 2007 14:58 |
Thomas Schindl
Messages: 6651
Registered: July 2009 |
Senior Member |
|
|
Hi,
I suppose you need to create your own cell renderer. For SWT-Tables we
provide LabelProviders who use OwnerDraw at least from Viewers-Point of
view we could invent something like this also for GridViewer but I don't
know enough about the internals of the Grid-implementation.
Tom
Stanislav Vodetskyi schrieb:
> Yes, I understand the architecture. But can we draw custom content using
> label providers with GridViewer?
> Regards,
> Stanislav
>
>> What is a "Object", with Viewers normally the LabelProvider makes a
>> String/Image presentation from the model-object, what else can you
>> display to the user?
>>
>> Tom
>>
>> Stanislav Vodetskyi schrieb:
>>> Hi!
>>>
>>> As far as I see, we are bound to String when using Grid (even through
>>> GridViewer), cause GridItem uses text as cell values. Is there any
>>> way to set custom objects as cell values? This is important for our
>>> project, as we are using different datatypes in cells.
>>>
>>> Regards,
>>> Stanislav
>>
>>
--
B e s t S o l u t i o n . at
------------------------------------------------------------ --------
Tom Schindl JFace-Committer
------------------------------------------------------------ --------
|
|
|
| Re: Custom data model for cells in grid [message #585548 is a reply to message #41460] |
Wed, 24 October 2007 15:25 |
Chris Gross
Messages: 471
Registered: July 2009 |
Senior Member |
|
|
As Tom said you could write your own cell renderer. I'd be interested
to see a screenshot of what you are trying to achieve.
Regards,
-Chris
Tom Schindl wrote:
> Hi,
>
> I suppose you need to create your own cell renderer. For SWT-Tables we
> provide LabelProviders who use OwnerDraw at least from Viewers-Point of
> view we could invent something like this also for GridViewer but I don't
> know enough about the internals of the Grid-implementation.
>
> Tom
>
> Stanislav Vodetskyi schrieb:
>> Yes, I understand the architecture. But can we draw custom content
>> using label providers with GridViewer?
>> Regards,
>> Stanislav
>>
>>> What is a "Object", with Viewers normally the LabelProvider makes a
>>> String/Image presentation from the model-object, what else can you
>>> display to the user?
>>>
>>> Tom
>>>
>>> Stanislav Vodetskyi schrieb:
>>>> Hi!
>>>>
>>>> As far as I see, we are bound to String when using Grid (even
>>>> through GridViewer), cause GridItem uses text as cell values. Is
>>>> there any way to set custom objects as cell values? This is
>>>> important for our project, as we are using different datatypes in
>>>> cells.
>>>>
>>>> Regards,
>>>> Stanislav
>>>
>>>
>
>
|
|
|
| Re: Custom data model for cells in grid [message #585585 is a reply to message #41562] |
Wed, 24 October 2007 16:24 |
blutkind 
Messages: 25
Registered: July 2009 |
Junior Member |
|
|
Thanks for quick response!
We would try using OwnerDraw. I'll send you the screenshot as soon as we
achieve some solid results :)
We actually want to use combo-box as editor, and need renderer to look
like combo too - that leads to the need for custom drawing. Perhaps you
can advise some easier way? :)
Regards,
Stanislav
> As Tom said you could write your own cell renderer. I'd be interested
> to see a screenshot of what you are trying to achieve.
>
> Regards,
> -Chris
>
> Tom Schindl wrote:
>> Hi,
>>
>> I suppose you need to create your own cell renderer. For SWT-Tables we
>> provide LabelProviders who use OwnerDraw at least from Viewers-Point
>> of view we could invent something like this also for GridViewer but I
>> don't know enough about the internals of the Grid-implementation.
>>
>> Tom
>>
>> Stanislav Vodetskyi schrieb:
>>> Yes, I understand the architecture. But can we draw custom content
>>> using label providers with GridViewer?
>>> Regards,
>>> Stanislav
>>>
>>>> What is a "Object", with Viewers normally the LabelProvider makes a
>>>> String/Image presentation from the model-object, what else can you
>>>> display to the user?
>>>>
>>>> Tom
>>>>
>>>> Stanislav Vodetskyi schrieb:
>>>>> Hi!
>>>>>
>>>>> As far as I see, we are bound to String when using Grid (even
>>>>> through GridViewer), cause GridItem uses text as cell values. Is
>>>>> there any way to set custom objects as cell values? This is
>>>>> important for our project, as we are using different datatypes in
>>>>> cells.
>>>>>
>>>>> Regards,
>>>>> Stanislav
>>>>
>>>>
>>
>>
|
|
| |
| Re: Custom data model for cells in grid [message #586009 is a reply to message #41690] |
Mon, 29 October 2007 20:16 |
blutkind
Messages: 25
Registered: July 2009 |
Junior Member |
|
|
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I've been playing with GridCellRenderer for some time, and couldn't
make it work under windows. I'm posting a snippet here, that works
perfectly on Mac OS X.
It also illustrates windows problems perfectly.
The class we need is ComboCellRenderer. I left some comments in the
code, to point out main problems.
- we have to hide snapshot shell from user. That is done by setting
it's location to [-100,-100] - works perfectly on mac, but not on
windows. On windows XP, when trying to get the snapshot from a shell,
located beyond the screen, we get blank area.
-in the computeSize() method we need to know the size of the cell - to
fit our combobox. This can be achieved, but requires some tricky
loopback.
To make it work on windows (if you run the snippet "as is" it will fall
into infinite loop under win xp) you need to replace renderer's
constructor with the following:
public ComboCellRenderer(Grid grid) {
this.grid = grid;
shell = new Shell(grid.getShell(), SWT.NO_TRIM);
// or use:
// shell = new Shell(grid.getDisplay(), SWT.NO_TRIM);
combo = new Combo(shell, SWT.DROP_DOWN);
combo.setLocation(0, 0);
// hide the snapshot shell from user - will not work under win xp
// platform.
// will have to find some other way round this on windows.
// shell.setLocation(-100, -100);
shell.open();
// shell.setVisible(false);
}
It will not work on mac properly with this constructor, neither with
grid.getShell() (falling into infinite loop) nor with grid.getDisplay()
(a little better, but still not good).
As you can see, shell's setLocation() method is commented - otherwise,
nothing will be drawn in a cell. I also had to comment
shell.setVisible(false) to make it work. It is not critical at all, and
can be commented on mac too, but I like when it's present
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Finally, you can pass either grid.getShell() to the shell constructor,
or grid.getDisplay(). In the latter case, if you move a window over
that shell, it won't be visible.
So, as you can see, the main difficulty is that we cannot hide the
snapshot shell from user on windows XP, plus there is minor difficulty
with getting cell size. Would like to hear your thoughts on how to
achieve it. Thanks in advance
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----------------14973145151600932445
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In fact, what we really need and dream of is a cell renderer, that can
take Control as an argument and paint it on screen - like it is done in
Swing
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----------------14973145151600932445
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, because right now we will have to reimplement all basic cell
rendering, as DefaultCellRenderer cannot be extended. Are you planning
to implement something like this in near future?
**************************************
the snippet:
**************************************
package snippets;
import java.util.ArrayList;
import java.util.Random;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.nebula.jface.gridviewer.GridTableViewer;
import org.eclipse.nebula.jface.gridviewer.GridViewerColumn;
import org.eclipse.nebula.widgets.grid.Grid;
import org.eclipse.nebula.widgets.grid.GridCellRenderer;
import org.eclipse.nebula.widgets.grid.GridItem;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
/**
* Snippet for demonstrating combo box rendering.
*
* @author svo
*
*/
public class SnippetComboRenderer {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
shell.setLocation(100, 100);
shell.setSize(400, 400);
// create composite
final Composite composite = new Composite(shell, SWT.NONE);
composite.setLayout(new FillLayout());
//create table viewer
final GridTableViewer tableViewer = new GridTableViewer(composite);
final GridViewerColumn column = new GridViewerColumn(tableViewer, SWT.NONE);
column.getColumn().setText("Column1");
column.getColumn().setWidth(200);
column.getColumn().setCellRenderer(new
ComboCellRenderer(tableViewer.getGrid()));
tableViewer.setLabelProvider(new TableLabelProvider());
tableViewer.setContentProvider(new ArrayContentProvider());
tableViewer.getGrid().setCellSelectionEnabled(true);
tableViewer.setInput(new TableInput(
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----------------14973145151600932445
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);
tableViewer.getGrid().setLinesVisible(true);
tableViewer.getGrid().setHeaderVisible(true);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
@SuppressWarnings("serial")
static class TableInput extends ArrayList<String[]> {
private final String[] values = {"Noise", "Electronic", "Experimental",
"Industrial"};
public TableInput(final int size) {
final Random random = new Random();
for (int i = 0; i<size; i++) {
add(new String[] {values[random.nextInt(values.length-1)]});
}
}
}
static class TableLabelProvider extends LabelProvider implements
ITableLabelProvider{
@Override
public Image getColumnImage(Object element, int columnIndex) {
return null;
}
@Override
public String getColumnText(Object element, int columnIndex) {
final String[] row = (String[]) element;
return row[columnIndex];
}
}
static class ComboCellRenderer extends GridCellRenderer {
private final Grid grid;
private final Combo combo;
private final Shell shell;
public ComboCellRenderer(Grid grid) {
this.grid = grid;
shell = new Shell(grid.getDisplay(), SWT.NO_TRIM);
combo = new Combo(shell,SWT.DROP_DOWN);
combo.setLocation(0, 0);
//hide the snapshot shell from user - will not work under win xp platform.
//will have to find some other way round this on windows.
shell.setLocation(-100, -100);
shell.open();
shell.setVisible(false);
}
@Override
public boolean notify(int event, Point point, Object value) {
return false;
}
@Override
public Point computeSize(GC gc, int hint, int hint2, Object value) {
final Point rendererSize = getSize();
//renderer size is [0,0]. Need to get to know cell size somehow.
//we can get it from grid, but this kind of loopback is not very good
looking (plus, it won't always return correct item height)
//but it works, in fact
----------------14973145151600932445
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----------------14973145151600932445
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
final Point comboSize = combo.computeSize(hint, hint2);
final Point gridCellSize = new
Point(grid.getColumn(getColumn()).getWidth(),
Math.max(grid.getItemHeight(),comboSize.y));
combo.setSize(gridCellSize);
return combo.getSize();
}
@Override
public void paint(GC gc, Object value) {
final GridItem item = (GridItem) value;
System.out.println(item.getText(getColumn()));
combo.setItems(new String[] {item.getText(getColumn())});
combo.select(0);
shell.setSize(combo.getSize());
gc.drawImage(takeSnapshot(), getBounds().x, getBounds().y);
}
private Image takeSnapshot() {
shell.setVisible(true);
final Image image = new Image(shell.getDisplay(), getBounds().width,
getBounds().height);
final GC gc = new GC(combo);
gc.copyArea(image, 0, 0);
shell.setVisible(false);
gc.dispose();
return image;
}
}
}
***********************************
Regards,
Stanislav
Tom Schindl ><tom.schindl@bestsolution.at> wrote:
>Stanislav Vodetskyi schrieb:
>> Thanks for quick response!
>> We would try using OwnerDraw. I'll send you the screenshot as soon as we
>> achieve some solid results
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>> We actually want to use combo-box as editor, and need renderer to look
>> like combo too - that leads to the need for custom drawing. Perhaps you
>> can advise some easier way?
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>>
>
>That's fairly easy make a screenshot on the fly from the Combo and set
>the icon onto cell
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I'm doing this with Checkboxes and it works
>fairly well [1].
>
>Please don't mix things:
>- OwnerDraw is specific to SWT-Tables/Trees you won't have any luck
> using it with Grid
>- CellRenders are the Grid-way of drawing custom things into
> a cell
>
>Tom
>
>[1]http://tom-eclipse-dev.blogspot.com/2007_01_01_archive.html
>
>--
>B e s t S o l u t i o n . at
> ------------------------------------------------------------ --------
>Tom Schindl JFace-Committer
> ------------------------------------------------------------ --------
--
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