Composite background color is not handled consistently between android / ios / browser

[evolanakis]

• On Android a tree inherits the background color of the parent
• On iOs it is initialized to the default color.

Expected: the code snippet below should have the same result on both platforms.

package app;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;

import com.eclipsesource.tabris.ui.AbstractPage;
import com.eclipsesource.tabris.ui.PageData;

@SuppressWarnings("serial")
public class TopLevelPage extends AbstractPage {

    private Text text;

    @Override
    public void createContent(final Composite parent, PageData data) {
        parent.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_RED));
        parent.setLayout(new FillLayout());

        Composite c = new Composite(parent, SWT.NONE); // also for Tree
    }

}

[mpost]

There is no background on tree on Android i think. It is transparent.

[evolanakis]

But after tree.setBackground(...) it has a color on android.

My point is, it is not cross platform as currently implemented. It should be fairly trivial to make it consistent on both platforms.

[mpost]

That is true.

[evolanakis]

BTW: Saw this again today in another app. It happens for any Composite (snippet adjusted).

In a nutshell: if the background color of a composite is not set, there is a different result between iOs and Browser / Android.