Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Expandbar in an Expandbar (Problems resizing / layouting an Expandbar.)
| Expandbar in an Expandbar [message #780162] |
Tue, 17 January 2012 09:37  |
 Jan Mielke
Messages: 2
Registered: January 2012 |
Junior Member |
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Hi everyone and thanks for taking time looking at my problem.
I have a class that uses an Expandbar in order to show some values.
I need to be able to use this class again as a value, but I cant find
a way that the items of the second Expandbar are layoutet as I want.
In my example code:
How can I make "Item 1" being sized "the right way" (not being scrolled)
after it was expanded? (Resize the shell after "Item 1" was expanded
and you see what I mean.)
package Expandbar;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ExpandEvent;
import org.eclipse.swt.events.ExpandListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.ExpandBar;
import org.eclipse.swt.widgets.ExpandItem;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class MExpandbar extends Composite{
// just to make out if I need to create a second MExpandbar in this example
private final int type;
private ExpandBar bar;
protected final ExpandItem parentItem;
public MExpandbar(Composite parent, int type, ExpandItem pItem) {
super(parent, SWT.NONE);
this.type = type;
this.parentItem = pItem;
this.setLayout(new FillLayout());
this.bar = new ExpandBar(this, SWT.V_SCROLL);
ExpandItem item0 = new ExpandItem (bar, SWT.NONE);
// Creating the content that is set to the ExpandItem
Composite composite = new Composite (bar, SWT.NONE);
composite.setLayout(new GridLayout(2, false));
for(int i = 0; i < 5; i++) {
Label lbl = new Label(composite, SWT.NONE);
lbl.setText("Label: "+i);
Text txt = new Text(composite, SWT.BORDER);
txt.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
}
if(this.type == 0) {
Label lbl = new Label(composite, SWT.NONE);
lbl.setText("Exbar:");
lbl.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING));
Composite cmpNewBar = new Composite(composite, SWT.NONE);
cmpNewBar.setLayout(new FillLayout());
cmpNewBar.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
new MExpandbar(cmpNewBar, 1, item0);
}
item0.setText("Item "+type);
item0.setHeight(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
item0.setControl(composite);
bar.addExpandListener(new ExpandListener() {
@Override
public void itemExpanded(ExpandEvent arg0) {
final ExpandItem item0 = (ExpandItem)arg0.item;
if(parentItem != null) {
parentItem.setHeight(parentItem.getHeight()+item0.getHeight());
}
}
@Override
public void itemCollapsed(ExpandEvent arg0) {
ExpandItem item0 = (ExpandItem)arg0.item;
if(parentItem != null) {
parentItem.setHeight(parentItem.getHeight()-item0.getHeight());
}
}
});
}
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout(new FillLayout());
shell.setText("ExpandBar Example");
Composite cmpExpandbar = new Composite(shell, SWT.NONE);
cmpExpandbar.setLayout(new FillLayout());
new MExpandbar(cmpExpandbar, 0, null);
shell.setSize(400, 350);
shell.open();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) {
display.sleep ();
}
}
display.dispose();
}
}
Attachment: 00_exbar.jpg
(Size: 22.09KB, Downloaded 1163 times)
[Updated on: Tue, 17 January 2012 09:38] Report message to a moderator |
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| Re: Expandbar in an Expandbar [message #780229 is a reply to message #780162] |
Tue, 17 January 2012 12:10  |
Jan Mielke
Messages: 2
Registered: January 2012 |
Junior Member |
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After trying out nearly everything I found my mistake...
Of cause the GridLayoutData of the Composite on which the second ExpandBar ist placed must be GridData.FillBoth...
The following "debug-code" works for me:
package Expandbar;
import java.util.TreeMap;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ExpandEvent;
import org.eclipse.swt.events.ExpandListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.ExpandBar;
import org.eclipse.swt.widgets.ExpandItem;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class MExpandbar extends Composite{
private final static TreeMap<String, Composite> tmComposites = new TreeMap<String, Composite>();
private final static String KEY_COMP_SHELL = "CompShell";
private final static String KEY_COMP_MEX0 = "CompMex0";
private final static String KEY_COMP_MEX1 = "CompMex1";
private final static String KEY_COMP_Cont0 = "CompCont0";
private final static String KEY_COMP_Cont1 = "CompCont1";
private final static String KEY_COMP_GRID4MEX1 = "Comp4Mex1";
// just to make out if I need to create a second MExpandbar in this example
private final int type;
private ExpandBar bar;
protected final ExpandItem parentItem;
public MExpandbar(Composite parent, int type, ExpandItem pItem) {
super(parent, SWT.NONE);
this.type = type;
this.parentItem = pItem;
this.setLayout(new FillLayout());
if(this.type == 0) {
this.bar = new ExpandBar(this, SWT.V_SCROLL);
}
else {
this.bar = new ExpandBar(this, SWT.NONE);
}
ExpandItem item0 = new ExpandItem (bar, SWT.NONE);
// Creating the content that is set to the ExpandItem
Composite composite = new Composite (bar, SWT.NONE);
composite.setLayout(new GridLayout(2, false));
for(int i = 0; i < 5; i++) {
Label lbl = new Label(composite, SWT.NONE);
lbl.setText("Label: "+i);
Text txt = new Text(composite, SWT.BORDER);
txt.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
}
if(this.type == 0) {
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_MEX0, this);
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_Cont0, composite);
Label lbl = new Label(composite, SWT.NONE);
lbl.setText("Exbar:");
lbl.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING));
Composite cmpNewBar = new Composite(composite, SWT.NONE);
cmpNewBar.setLayout(new FillLayout());
cmpNewBar.setLayoutData(new GridData(GridData.FILL_BOTH));
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_GRID4MEX1, composite);
new MExpandbar(cmpNewBar, 1, item0);
}
else {
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_MEX1, this);
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_Cont1, composite);
}
item0.setText("Item "+type);
item0.setHeight(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
item0.setControl(composite);
bar.addExpandListener(new ExpandListener() {
@Override
public void itemExpanded(ExpandEvent arg0) {
final ExpandItem item0 = (ExpandItem)arg0.item;
if(parentItem != null) {
parentItem.setHeight(parentItem.getHeight()+item0.getHeight());
}
// Wenn dieser code ausgeführt wird, wird nach schließen und öffnen des ersten Items alles richtig angezeigt...
MExpandbar.tmComposites.get(MExpandbar.KEY_COMP_SHELL).layout(true, true);
}
@Override
public void itemCollapsed(ExpandEvent arg0) {
ExpandItem item0 = (ExpandItem)arg0.item;
if(parentItem != null) {
parentItem.setHeight(parentItem.getHeight()-item0.getHeight());
}
}
});
}
public static void main(String[] args) {
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout(new FillLayout());
shell.setText("ExpandBar Example");
Composite cmpExpandbar = new Composite(shell, SWT.NONE);
cmpExpandbar.setData("Shell");
MExpandbar.tmComposites.put(MExpandbar.KEY_COMP_SHELL, cmpExpandbar);
cmpExpandbar.setLayout(new FillLayout());
new MExpandbar(cmpExpandbar, 0, null);
shell.setSize(400, 350);
shell.open();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) {
display.sleep ();
}
}
display.dispose();
}
}
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