Re: [albireo-dev] size/layout platform testing

[Bruno Haible <haible@xxxxxxx>]

| > So, if there's a problem with infinite propagation, we are currently not 
| > preventing it today (i.e. the inhibit flag is not preventing it). It's 
| > not clear if we can or if we need to.
| 
| Good point. We should produce an example where this infinite loop actually
| occurs, and then fix it by moving the 'inhibit' logic into the opposite
| notification (AWT -> SWT).

I'm committing this new view.

Index: plugin.xml
===================================================================
RCS file: /cvsroot/technology/org.eclipse.albireo/org.eclipse.albireo.examples.plugin/plugin.xml,v
retrieving revision 1.15
diff -c -3 -r1.15 plugin.xml
*** plugin.xml	27 Feb 2008 06:23:33 -0000	1.15
--- plugin.xml	27 Feb 2008 17:05:06 -0000
***************
*** 56,61 ****
--- 56,67 ----
              name="Resize Flickering">
        </view>
        <view
+             class="org.eclipse.albireo.examples.plugin.views.StubbornResizeView"
+             id="org.eclipse.albireo.examples.plugin.stubbornResize"
+             category="org.eclipse.albireo"
+             name="Resize fixed-size">
+       </view>
+       <view
              class="org.eclipse.albireo.examples.plugin.views.FocusExampleView1"
              id="org.eclipse.albireo.examples.plugin.focus1"
              category="org.eclipse.albireo"

=========================== StubbornResizeView.java ===========================
package org.eclipse.albireo.examples.plugin.views;

import java.awt.Dimension;

import javax.swing.JComponent;
import javax.swing.JLabel;

import org.eclipse.albireo.core.SwingControl;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.part.ViewPart;

/**
 * This view tests what happens when a JComponent is not cooperative
 * with SWT regarding its size. If SWT says "your size is 100x100"
 * and the Swing component says "my size is 50x50", what happens?
 */
public class StubbornResizeView extends ViewPart {

    public static String ID = "org.eclipse.albireo.examples.plugin.stubbornResize"; //$NON-NLS-1$
    private SwingControl[][] swingControl;

    public void createPartControl(final Composite parent) {

        parent.setLayout(new GridLayout(2, true));

        swingControl = new SwingControl[2][];
        for (int i = 0; i < 2; i++) {
            swingControl[i] = new SwingControl[2];
            for (int j = 0; j < 2; j++) {
                swingControl[i][j] =
                    new SwingControl(parent, SWT.NONE) {
                        protected JComponent createSwingComponent() {
                            class MyLabel extends JLabel {
                                MyLabel(String text) {
                                    super(text);
                                }
                                private Dimension fixedSize;
                                public Dimension getMinimumSize() {
                                    if (fixedSize != null)
                                        return new Dimension(fixedSize);
                                    else
                                        return super.getMinimumSize();
                                }
                                public Dimension getPreferredSize() {
                                    if (fixedSize != null)
                                        return new Dimension(fixedSize);
                                    else
                                        return super.getPreferredSize();
                                }
                                public Dimension getMaximumSize() {
                                    if (fixedSize != null)
                                        return new Dimension(fixedSize);
                                    else
                                        return super.getMaximumSize();
                                }
                                public void setFixedSize(Dimension size) {
                                    fixedSize = size;
                                }
                            }
                            MyLabel label = new MyLabel("fixed-size");
                            label.setFixedSize(label.getPreferredSize());
                            return label;
                        }
                        // Overridden to make the width and the height quite arbitrary.
                        // You can comment this out.
                        public Point computeSize(int widthHint, int heightHint, boolean changed) {
                            Point size = super.computeSize(widthHint, heightHint, changed);
                            if (false) {
                                // Make it bigger than necessary.
                                size.x += ((size.x % 20) != 0 ? 20 - (size.x % 20) : 0);
                                size.y += ((size.y % 20) != 0 ? 20 - (size.y % 20) : 0);
                                return size;
                            } else {
                                // Make it smaller then necessary.
                                return new Point(40, 8);
                            }
                        }
                        public Composite getLayoutableAncestor() {
                            return parent;
                        }
                    };
            }
        }

        Button layoutSWTButton = new Button(parent, SWT.PUSH);
        layoutSWTButton.setText("SWT-Layout");
        GridData data = new GridData();
        data.horizontalAlignment = SWT.LEAD;
        data.verticalAlignment = SWT.CENTER;
        layoutSWTButton.setLayoutData(data);
    }

    public void setFocus() {
        swingControl[1][1].setFocus();
    }
}