--- /dev/null
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
+ *
+ * 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 com.android.ide.eclipse.adt.internal.editors.layout.gle2;
+
+import org.eclipse.jface.action.IStatusLineManager;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.MouseAdapter;
+import org.eclipse.swt.events.MouseEvent;
+import org.eclipse.swt.graphics.Color;
+import org.eclipse.swt.graphics.GC;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.graphics.Region;
+import org.eclipse.swt.layout.FillLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Label;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Tree;
+import org.eclipse.swt.widgets.TreeItem;
+import org.eclipse.ui.IActionBars;
+import org.eclipse.ui.views.properties.IPropertySheetEntry;
+import org.eclipse.ui.views.properties.PropertySheetEntry;
+
+/**
+ * A customized property sheet page for the graphical layout editor v2.
+ * <p/>
+ * Currently it just provides a custom tooltip to display attributes javadocs.
+ * <p/>
+ * The property sheet is linked to the current site's selection service.
+ * <p/>
+ * Note: this is an exact copy of GLE1's UiPropertySheetPage implementation.
+ * The idea is that eventually GLE1 will go away and we'll upgrade this to be
+ * a more robust property editor (it currently lacks on so many levels, it's not
+ * even worth listing the flaws.)
+ *
+ * @since GLE2
+ */
+public class PropertySheetPage extends org.eclipse.ui.views.properties.PropertySheetPage {
+
+ public PropertySheetPage() {
+ super();
+ }
+
+ @Override
+ public void createControl(Composite parent) {
+ super.createControl(parent);
+
+ setupTooltip();
+
+ // Override parent class' "set status message" behavior. The parent will set
+ // the status message to the property's "getDescription()" field. That field
+ // may contain newlines, which means the text gets cut off. We want to instead
+ // show ALL the text, fit on a single line, and since we don't get to subclass
+ // the viewer we will just replace the status message with our own, which works
+ // since our mouse listener is registered later so runs later.
+ final Tree tree = (Tree) getControl();
+ tree.addMouseListener(new MouseAdapter() {
+ @Override
+ public void mouseDown(MouseEvent event) {
+ Point pt = new Point(event.x, event.y);
+ TreeItem item = tree.getItem(pt);
+ if (item != null) {
+ Object object = item.getData();
+ if (object instanceof IPropertySheetEntry) {
+ IPropertySheetEntry entry = (IPropertySheetEntry) object;
+ String help = entry.getDescription();
+ if (help != null) {
+ // Strip out newlines to make this a single line entry
+ help = help.replace('\n', ' ');
+ // Remove repeated spaces in case there were trailing spaces
+ help = help.replaceAll(" ", " "); //$NON-NLS-1$ //$NON-NLS-2$
+ IActionBars actionBars = getSite().getActionBars();
+ IStatusLineManager status = actionBars.getStatusLineManager();
+ status.setMessage(help);
+ }
+ }
+ }
+ }
+ });
+
+ // Fix the selection background. In Eclipse 3.5 and 3.6, the selection color
+ // is white, painted on top of a white or light blue background (table striping),
+ // which is practically unreadable. This is fixed in 3.7M3, but we need a workaround
+ // for earlier releases. The following code performs custom painting of this region,
+ // and is based on the snippet "draw a custom gradient selection for tree" (snippet 226)
+ // from http://www.eclipse.org/swt/snippets/ .
+ tree.addListener(SWT.EraseItem, new Listener() {
+ public void handleEvent(Event event) {
+ if ((event.detail & SWT.SELECTED) != 0) {
+ GC gc = event.gc;
+ Rectangle area = tree.getClientArea();
+ int columnCount = tree.getColumnCount();
+ if (event.index == columnCount - 1 || columnCount == 0) {
+ int width = area.x + area.width - event.x;
+ if (width > 0) {
+ Region region = new Region();
+ gc.getClipping(region);
+ region.add(event.x, event.y, width, event.height);
+ gc.setClipping(region);
+ region.dispose();
+ }
+ }
+ gc.setAdvanced(true);
+ if (gc.getAdvanced()) {
+ gc.setAlpha(127);
+ }
+ Rectangle rect = event.getBounds();
+ Color foreground = gc.getForeground();
+ Color background = gc.getBackground();
+ Display display = tree.getDisplay();
+ gc.setForeground(display.getSystemColor(SWT.COLOR_LIST_SELECTION));
+ gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
+ gc.fillGradientRectangle(0, rect.y, 500, rect.height, false);
+ gc.setForeground(foreground);
+ gc.setBackground(background);
+ event.detail &= ~SWT.SELECTED;
+ }
+ }
+ });
+ }
+
+ /**
+ * Sets up a custom tooltip when hovering over tree items.
+ * <p/>
+ * The tooltip will display the element's javadoc, if any, or the item's getText otherwise.
+ */
+ private void setupTooltip() {
+ final Tree tree = (Tree) getControl();
+
+ /*
+ * Reference:
+ * http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet125.java?view=markup
+ */
+
+ final Listener listener = new Listener() {
+ Shell tip = null;
+ Label label = null;
+
+ public void handleEvent(Event event) {
+ switch(event.type) {
+ case SWT.Dispose:
+ case SWT.KeyDown:
+ case SWT.MouseExit:
+ case SWT.MouseDown:
+ case SWT.MouseMove:
+ if (tip != null) {
+ tip.dispose();
+ tip = null;
+ label = null;
+ }
+ break;
+ case SWT.MouseHover:
+ if (tip != null) {
+ tip.dispose();
+ tip = null;
+ label = null;
+ }
+
+ String tooltip = null;
+
+ TreeItem item = tree.getItem(new Point(event.x, event.y));
+ if (item != null) {
+ Object data = item.getData();
+ if (data instanceof PropertySheetEntry) {
+ tooltip = ((PropertySheetEntry) data).getDescription();
+ }
+
+ if (tooltip == null) {
+ tooltip = item.getText();
+ } else {
+ tooltip = item.getText() + ":\r" + tooltip;
+ }
+
+ if (tooltip != null) {
+ Shell shell = tree.getShell();
+ Display display = tree.getDisplay();
+
+ tip = new Shell(shell, SWT.ON_TOP | SWT.NO_FOCUS | SWT.TOOL);
+ tip.setBackground(display .getSystemColor(SWT.COLOR_INFO_BACKGROUND));
+ FillLayout layout = new FillLayout();
+ layout.marginWidth = 2;
+ tip.setLayout(layout);
+ label = new Label(tip, SWT.NONE);
+ label.setForeground(display.getSystemColor(SWT.COLOR_INFO_FOREGROUND));
+ label.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));
+ label.setData("_TABLEITEM", item);
+ label.setText(tooltip);
+ label.addListener(SWT.MouseExit, this);
+ label.addListener(SWT.MouseDown, this);
+ Point size = tip.computeSize(SWT.DEFAULT, SWT.DEFAULT);
+ Rectangle rect = item.getBounds(0);
+ // Display the tooltip on the same line as the property,
+ // but offset to the right of wherever the mouse cursor was,
+ // such that it does not obscure the list of properties.
+ Point pt = tree.toDisplay(event.x + 15, rect.y);
+ tip.setBounds(pt.x, pt.y, size.x, size.y);
+ tip.setVisible(true);
+ }
+ }
+ }
+ }
+ };
+
+ tree.addListener(SWT.Dispose, listener);
+ tree.addListener(SWT.KeyDown, listener);
+ tree.addListener(SWT.MouseMove, listener);
+ tree.addListener(SWT.MouseHover, listener);
+
+ }
+
+}
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