Start working on non modal error feedback.

git-svn-id: https://svn.argeo.org/commons/trunk@8507 4cfe0d0a-d680-48aa-b62c-e0a02a3f76cc

diff --git a/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/dialogs/NonModalErrorFeedback.java b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/dialogs/NonModalErrorFeedback.java
new file mode 100644 (file)
index 0000000..69d69f9
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/dialogs/NonModalErrorFeedback.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.eclipse.ui.dialogs;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.ArgeoException;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.ShellAdapter;
+import org.eclipse.swt.events.ShellEvent;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Text;
+
+/** Generic error dialog to be used in try/catch blocks */
+class NonModalErrorFeedback {
+       private final static Log log = LogFactory
+                       .getLog(NonModalErrorFeedback.class);
+
+       private final String message;
+       private final Throwable exception;
+
+       private Shell shell;
+
+       public static void show(String message, Throwable e) {
+               // rethrow ThreaDeath in order to make sure that RAP will properly clean
+               // up the UI thread
+               if (e instanceof ThreadDeath)
+                       throw (ThreadDeath) e;
+
+               new NonModalErrorFeedback(getDisplay().getActiveShell(), message, e)
+                               .open();
+       }
+
+       public static void show(String message) {
+               new NonModalErrorFeedback(getDisplay().getActiveShell(), message, null)
+                               .open();
+       }
+
+       /** Tries to find a display */
+       private static Display getDisplay() {
+               try {
+                       Display display = Display.getCurrent();
+                       if (display != null)
+                               return display;
+                       else
+                               return Display.getDefault();
+               } catch (Exception e) {
+                       return Display.getCurrent();
+               }
+       }
+
+       public NonModalErrorFeedback(Shell parentShell, String message, Throwable e) {
+               this.message = message;
+               this.exception = e;
+               log.error(message, e);
+       }
+
+       public void open() {
+               if (shell != null)
+                       throw new ArgeoException("There is already a shell");
+               shell = new Shell(getDisplay(), SWT.NO_TRIM | SWT.BORDER | SWT.ON_TOP);
+               shell.setLayout(new GridLayout());
+               // shell.setText("Error");
+               shell.setSize(getInitialSize());
+               createDialogArea(shell);
+               // shell.pack();
+               // shell.layout();
+
+               Rectangle shellBounds = Display.getCurrent().getBounds();// RAP
+               Point dialogSize = shell.getSize();
+               int x = shellBounds.x + (shellBounds.width - dialogSize.x) / 2;
+               int y = shellBounds.y + (shellBounds.height - dialogSize.y) / 2;
+               shell.setLocation(x, y);
+
+               shell.addShellListener(new ShellAdapter() {
+                       private static final long serialVersionUID = -2701270481953688763L;
+
+                       @Override
+                       public void shellDeactivated(ShellEvent e) {
+                               closeShell();
+                       }
+               });
+
+               shell.open();
+       }
+
+       protected void closeShell() {
+               shell.close();
+               shell.dispose();
+               shell = null;
+       }
+
+       protected Point getInitialSize() {
+               // if (exception != null)
+               // return new Point(800, 600);
+               // else
+               return new Point(400, 300);
+       }
+
+       protected Control createDialogArea(Composite parent) {
+               Composite dialogarea = new Composite(parent, SWT.NONE);
+               dialogarea.setLayout(new GridLayout());
+               // Composite dialogarea = (Composite) super.createDialogArea(parent);
+               dialogarea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
+
+               Label messageLbl = new Label(dialogarea, SWT.NONE);
+               if (message != null)
+                       messageLbl.setText(message);
+               else if (exception != null)
+                       messageLbl.setText(exception.getLocalizedMessage());
+
+               Composite composite = new Composite(dialogarea, SWT.NONE);
+               composite.setLayout(new GridLayout(2, false));
+               composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
+
+               if (exception != null) {
+                       Text stack = new Text(composite, SWT.MULTI | SWT.LEAD | SWT.BORDER
+                                       | SWT.V_SCROLL | SWT.H_SCROLL);
+                       stack.setEditable(false);
+                       stack.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
+                       StringWriter sw = new StringWriter();
+                       exception.printStackTrace(new PrintWriter(sw));
+                       stack.setText(sw.toString());
+               }
+
+               // parent.pack();
+               return composite;
+       }
+}
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