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MasterDetailsBlock resizes when expanding section [message #464592]

Mon, 12 March 2007 10:31

Christoph

Messages: 55
Registered: July 2009

Member

Hi,
i have a masterdetailsblock and on one detailspage i have an expandable
section. Everytime i expand and collapse the section the weigths of the
master and of the details block changes with the result that the
master-part gets bigger and a scrollbar apears at the bottom of the block.
I donŽt see how i can avoid this.

Here is how i create the section:

final Section ec = toolkit.createSection(parent, Section.TWISTIE |
Section.FOCUS_TITLE | Section.COMPACT);
ec.setText(Messages.getString("geplan.ui.label.editor.bt.section1 "));
ec.setTitleBarForeground(toolkit.getColors().getColor("labelColor "));
ec.setToggleColor(toolkit.getColors().getColor("labelColor"));
ec.setLayout(new GridLayout(1, false));
gridData_5 = new GridData(SWT.FILL, SWT.TOP, true, false, 4, 1);
gridData_5.horizontalIndent=-9;
gridData_5.verticalIndent=7;
gridData_5.widthHint = 5216;
gridData_5.minimumWidth=516;
ec.setLayoutData(gridData_5);

final Composite exComposite=new Composite(ec,SWT.NONE);
exComposite.setLayout(new GridLayout(2,false));
gridData_9 = new GridData(SWT.LEFT, SWT.TOP, true, false, 1, 1);
exComposite.setLayoutData(gridData_9);

// i skip the content of the section here, there are basically three
labels and // three text-widgets.

ec.setClient(exComposite);
ec.addExpansionListener(new ExpansionAdapter() {
public void expansionStateChanged(ExpansionEvent e) {
super.expansionStateChanged(e);
// Try to set the weighs to the old value, which has no
effect
block.getSashForm().setWeights(new int[]{1, 2});
fieldAbfragename.setFocus();
}
});

Can anybody explain to me why my form gets resized?
Thanks for any help.
Christoph

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Re: MasterDetailsBlock resizes when expanding section [message #466505 is a reply to message #464592]

Fri, 20 April 2007 09:09

Filippo Carone

Messages: 2
Registered: July 2009

Junior Member

Christoph wrote:
> Hi,
> i have a masterdetailsblock and on one detailspage i have an expandable
> section. Everytime i expand and collapse the section the weigths of the
> master and of the details block changes with the result that the
> master-part gets bigger and a scrollbar apears at the bottom of the
> block. I donŽt see how i can avoid this.
>

I'm running into a similar issue. When you toggle the section the method
Section.internalSetExpanded() gets called, which in turn calls
Section.reflow(). This reflow() method redraws all the components inside
the parent ScrolledForm.

I tried to avoid the redraw of parts which shouldn't be involved adding
an expansion listener:

public void expansionStateChanging(ExpansionEvent e)
{
body.setRedraw(false);
body.setLayoutDeferred(true);
}

public void expansionStateChanged(ExpansionEvent e)
{
body.setRedraw(true);
body.setLayoutDeferred(false);
}

But the body redraw property is set to true inside the reflow(). This
shouldn't happen, since the section shouldn't arbitrarily set properties
of Composites inside the form.

Cheers,
Filippo

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