--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.swt;\r
+\r
+import java.util.HashMap;\r
+import java.util.Map;\r
+import java.util.concurrent.TimeUnit;\r
+import java.util.concurrent.atomic.AtomicInteger;\r
+\r
+import org.eclipse.jface.layout.GridDataFactory;\r
+import org.eclipse.jface.layout.GridLayoutFactory;\r
+import org.eclipse.jface.resource.FontDescriptor;\r
+import org.eclipse.jface.resource.ImageDescriptor;\r
+import org.eclipse.jface.resource.JFaceResources;\r
+import org.eclipse.jface.resource.LocalResourceManager;\r
+import org.eclipse.jface.viewers.IPostSelectionProvider;\r
+import org.eclipse.jface.viewers.ISelection;\r
+import org.eclipse.jface.viewers.ISelectionChangedListener;\r
+import org.eclipse.jface.viewers.SelectionChangedEvent;\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.accessibility.ACC;\r
+import org.eclipse.swt.accessibility.AccessibleAdapter;\r
+import org.eclipse.swt.accessibility.AccessibleControlAdapter;\r
+import org.eclipse.swt.accessibility.AccessibleControlEvent;\r
+import org.eclipse.swt.accessibility.AccessibleEvent;\r
+import org.eclipse.swt.events.ModifyEvent;\r
+import org.eclipse.swt.events.ModifyListener;\r
+import org.eclipse.swt.events.MouseAdapter;\r
+import org.eclipse.swt.events.MouseEvent;\r
+import org.eclipse.swt.events.MouseMoveListener;\r
+import org.eclipse.swt.events.MouseTrackListener;\r
+import org.eclipse.swt.events.SelectionAdapter;\r
+import org.eclipse.swt.events.SelectionEvent;\r
+import org.eclipse.swt.graphics.Image;\r
+import org.eclipse.swt.graphics.Point;\r
+import org.eclipse.swt.layout.GridData;\r
+import org.eclipse.swt.widgets.Composite;\r
+import org.eclipse.swt.widgets.Control;\r
+import org.eclipse.swt.widgets.Display;\r
+import org.eclipse.swt.widgets.Label;\r
+import org.eclipse.swt.widgets.Text;\r
+import org.eclipse.ui.ISharedImages;\r
+import org.eclipse.ui.internal.WorkbenchImages;\r
+import org.eclipse.ui.internal.WorkbenchMessages;\r
+import org.simantics.browsing.ui.GraphExplorer;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.common.processors.FilterSelectionRequestQueryProcessor;\r
+import org.simantics.browsing.ui.common.views.IFilterArea;\r
+import org.simantics.browsing.ui.common.views.IFilterAreaProvider;\r
+import org.simantics.browsing.ui.common.views.IFocusable;\r
+import org.simantics.db.layer0.SelectionHints;\r
+import org.simantics.utils.threads.SWTThread;\r
+import org.simantics.utils.threads.ThreadUtils;\r
+import org.simantics.utils.ui.ISelectionUtils;\r
+\r
+@SuppressWarnings("restriction")\r
+public class FilterArea extends Composite implements IFocusable, IFilterArea, IFilterAreaProvider {\r
+\r
+ protected static final Integer FILTER_DELAY = 500;\r
+\r
+ private final LocalResourceManager resourceManager;\r
+\r
+ protected GraphExplorer explorer;\r
+\r
+ protected FilterSelectionRequestQueryProcessor queryProcessor;\r
+\r
+ private Text filterText;\r
+ private NodeContext currentContext;\r
+\r
+ /**\r
+ * The control representing the clear button for the filter text entry. This\r
+ * value may be <code>null</code> if no such button exists, or if the\r
+ * controls have not yet been created.\r
+ */\r
+ protected Control clearButtonControl;\r
+\r
+ /**\r
+ * Construct the filter area UI component.\r
+ * \r
+ * @param explorer\r
+ * @param queryProcessor\r
+ * @param parent\r
+ * @param style\r
+ */\r
+ public FilterArea(final GraphExplorer explorer, final FilterSelectionRequestQueryProcessor queryProcessor, Composite parent, int style) {\r
+ super(parent, style | SWT.BORDER);\r
+\r
+ this.explorer = explorer;\r
+ this.queryProcessor = queryProcessor;\r
+\r
+ resourceManager = new LocalResourceManager(JFaceResources.getResources(parent.getDisplay()), this);\r
+\r
+ GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(this);\r
+ GridLayoutFactory.fillDefaults().margins(0, 0).spacing(0, 0).numColumns(2).equalWidth(false).applyTo(this);\r
+\r
+ createFilterText(this);\r
+ createFilterCancelIcon(this);\r
+\r
+ this.setBackground(filterText.getBackground());\r
+\r
+ addTextModifyListener();\r
+ addExplorerSelectionListener();\r
+ }\r
+\r
+ private void createFilterText(FilterArea filterArea) {\r
+ //filterText = new Text(this, SWT.SINGLE | SWT.FLAT | SWT.SEARCH | SWT.ICON_CANCEL);\r
+ filterText = new Text(this, SWT.SINGLE | SWT.ICON_CANCEL);\r
+ GridDataFactory.fillDefaults().grab(true, false).applyTo(filterText);\r
+\r
+ filterText.setFont(resourceManager.createFont(FontDescriptor.createFrom(filterText.getFont()).increaseHeight(-1)));\r
+\r
+ // if we're using a field with built in cancel we need to listen for\r
+ // default selection changes (which tell us the cancel button has been\r
+ // pressed)\r
+ if ((filterText.getStyle() & SWT.ICON_CANCEL) != 0) {\r
+ filterText.addSelectionListener(new SelectionAdapter() {\r
+ @Override\r
+ public void widgetDefaultSelected(SelectionEvent e) {\r
+ if (e.detail == SWT.ICON_CANCEL)\r
+ clearText();\r
+ }\r
+ });\r
+ }\r
+\r
+ GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, true);\r
+\r
+ // if the text widget supported cancel then it will have it's own\r
+ // integrated button. We can take all of the space.\r
+ if ((filterText.getStyle() & SWT.ICON_CANCEL) != 0)\r
+ gridData.horizontalSpan = 2;\r
+ filterText.setLayoutData(gridData);\r
+ }\r
+\r
+ private void createFilterCancelIcon(Composite parent) {\r
+ // only create the button if the text widget doesn't support one\r
+ // natively\r
+ if ((filterText.getStyle() & SWT.ICON_CANCEL) == 0) {\r
+ final Image inactiveImage = WorkbenchImages.getImage(ISharedImages.IMG_ETOOL_CLEAR_DISABLED);\r
+ final Image activeImage = WorkbenchImages.getImage(ISharedImages.IMG_ETOOL_CLEAR);\r
+ final Image pressedImage = (Image) resourceManager.get( ImageDescriptor.createWithFlags( ImageDescriptor.createFromImage( activeImage ), SWT.IMAGE_GRAY ) );\r
+\r
+ final Label clearButton= new Label(parent, SWT.NONE);\r
+ clearButton.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));\r
+ clearButton.setImage(inactiveImage);\r
+ clearButton.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND));\r
+ clearButton.setToolTipText(WorkbenchMessages.FilteredTree_ClearToolTip);\r
+ clearButton.addMouseListener(new MouseAdapter() {\r
+ private MouseMoveListener fMoveListener;\r
+\r
+ @Override\r
+ public void mouseDown(MouseEvent e) {\r
+ clearButton.setImage(pressedImage);\r
+ fMoveListener= new MouseMoveListener() {\r
+ private boolean fMouseInButton= true;\r
+\r
+ @Override\r
+ public void mouseMove(MouseEvent e) {\r
+ boolean mouseInButton= isMouseInButton(e);\r
+ if (mouseInButton != fMouseInButton) {\r
+ fMouseInButton= mouseInButton;\r
+ clearButton.setImage(mouseInButton ? pressedImage : inactiveImage);\r
+ }\r
+ }\r
+ };\r
+ clearButton.addMouseMoveListener(fMoveListener);\r
+ }\r
+\r
+ @Override\r
+ public void mouseUp(MouseEvent e) {\r
+ if (fMoveListener != null) {\r
+ clearButton.removeMouseMoveListener(fMoveListener);\r
+ fMoveListener= null;\r
+ boolean mouseInButton= isMouseInButton(e);\r
+ clearButton.setImage(mouseInButton ? activeImage : inactiveImage);\r
+ if (mouseInButton) {\r
+ clearText();\r
+ filterText.setFocus();\r
+ }\r
+ }\r
+ }\r
+\r
+ private boolean isMouseInButton(MouseEvent e) {\r
+ Point buttonSize = clearButton.getSize();\r
+ return 0 <= e.x && e.x < buttonSize.x && 0 <= e.y && e.y < buttonSize.y;\r
+ }\r
+ });\r
+ clearButton.addMouseTrackListener(new MouseTrackListener() {\r
+ @Override\r
+ public void mouseEnter(MouseEvent e) {\r
+ clearButton.setImage(activeImage);\r
+ }\r
+\r
+ @Override\r
+ public void mouseExit(MouseEvent e) {\r
+ clearButton.setImage(inactiveImage);\r
+ }\r
+\r
+ @Override\r
+ public void mouseHover(MouseEvent e) {\r
+ }\r
+ });\r
+ clearButton.getAccessible().addAccessibleListener(\r
+ new AccessibleAdapter() {\r
+ @Override\r
+ public void getName(AccessibleEvent e) {\r
+ e.result= WorkbenchMessages.FilteredTree_AccessibleListenerClearButton;\r
+ }\r
+ });\r
+ clearButton.getAccessible().addAccessibleControlListener(\r
+ new AccessibleControlAdapter() {\r
+ @Override\r
+ public void getRole(AccessibleControlEvent e) {\r
+ e.detail= ACC.ROLE_PUSHBUTTON;\r
+ }\r
+ });\r
+ this.clearButtonControl = clearButton;\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Clears the text in the filter text widget.\r
+ */\r
+ protected void clearText() {\r
+ //System.out.println("clearText");\r
+ filterText.setText(""); //$NON-NLS-1$\r
+ // TODO: HACK: this can be used to access filter for root context\r
+ explorer.select(null);\r
+ //textChanged();\r
+ }\r
+\r
+ protected void addTextModifyListener() {\r
+ filterText.addModifyListener(new ModifyListener() {\r
+\r
+ Map<NodeContext, AtomicInteger> modCount = new HashMap<NodeContext, AtomicInteger>();\r
+\r
+ @Override\r
+ public void modifyText(ModifyEvent e) {\r
+\r
+ final NodeContext context = getFilteredNode();\r
+ if (context == null)\r
+ return;\r
+\r
+ final String filter = filterText.getText();\r
+ //System.out.println("Scheduling setFilter(" + context + ", " + filter + ")");\r
+\r
+ AtomicInteger i = modCount.get(context);\r
+ if (i == null)\r
+ modCount.put(context, new AtomicInteger());\r
+ final AtomicInteger counter = modCount.get(context);\r
+ final int count = counter.incrementAndGet();\r
+\r
+ ThreadUtils.getNonBlockingWorkExecutor().schedule(new Runnable() {\r
+ @Override\r
+ public void run() {\r
+ int newCount = counter.get();\r
+ if (newCount != count)\r
+ return;\r
+ //System.out.println("schedule setFilter(" + context + ", " + filter + ")");\r
+ modCount.remove(context);\r
+ if (isDisposed())\r
+ return;\r
+ ThreadUtils.asyncExec(SWTThread.getThreadAccess(getDisplay()), new Runnable() {\r
+ @Override\r
+ public void run() {\r
+ if (isDisposed())\r
+ return;\r
+ //System.out.println("queryProcessor.setFilter(" + context + ", " + filter + ")");\r
+ queryProcessor.setFilter(context, filter.isEmpty() ? null : filter);\r
+ }\r
+ });\r
+ }\r
+ }, FILTER_DELAY, TimeUnit.MILLISECONDS);\r
+ }\r
+ });\r
+ }\r
+\r
+ protected void addExplorerSelectionListener() {\r
+ IPostSelectionProvider selectionProvider = (IPostSelectionProvider)explorer.getAdapter(IPostSelectionProvider.class);\r
+ selectionProvider.addSelectionChangedListener(new ISelectionChangedListener() {\r
+ @Override\r
+ public void selectionChanged(SelectionChangedEvent event) {\r
+\r
+ ISelection selection = event.getSelection();\r
+ NodeContext context = ISelectionUtils.getSinglePossibleKey(selection, SelectionHints.KEY_MAIN, NodeContext.class);\r
+ if(context == null) {\r
+ context = ISelectionUtils.filterSingleSelection(selection, NodeContext.class);\r
+ }\r
+\r
+ if (context == null) {\r
+ context = explorer.getRoot();\r
+ }\r
+\r
+ assert (context != null);\r
+\r
+ String filter = queryProcessor.getFilter(context);\r
+\r
+ if (filter == null)\r
+ filter = "";\r
+\r
+ //filterText.setData(null);\r
+ //System.out.println("selection changed, new filter: " + filter + " for context " + context + ", currentContext=" + currentContext);\r
+ currentContext = context;\r
+ filterText.setText(filter);\r
+ //filterText.setData("context", context);\r
+ }\r
+ });\r
+ }\r
+\r
+ protected NodeContext getFilteredNode() {\r
+ if(currentContext != null) return currentContext;\r
+ else return explorer.getRoot();\r
+// return currentContext;\r
+// NodeContext context = (NodeContext)filterText.getData("context");\r
+// if (context == null)\r
+// context = explorer.getRoot();\r
+// return context;\r
+\r
+ }\r
+\r
+ @Override\r
+ public void focus() {\r
+ if (filterText.isDisposed())\r
+ return;\r
+ Display d = filterText.getDisplay();\r
+ if (d.getThread() == Thread.currentThread()) {\r
+ doSetFocus();\r
+ } else {\r
+ d.asyncExec(new Runnable() {\r
+ @Override\r
+ public void run() {\r
+ if (filterText.isDisposed())\r
+ return;\r
+ doSetFocus();\r
+ }\r
+ });\r
+ }\r
+ }\r
+\r
+ @Override\r
+ public void dispose() {\r
+ \r
+ if (isDisposed())\r
+ return;\r
+ \r
+ resourceManager.dispose();\r
+ explorer = null;\r
+ queryProcessor = null;\r
+ filterText = null;\r
+ currentContext = null;\r
+ clearButtonControl = null;\r
+ \r
+ super.dispose();\r
+ \r
+ }\r
+\r
+ protected void doSetFocus() {\r
+ filterText.selectAll();\r
+ filterText.setFocus();\r
+ }\r
+\r
+ @Override\r
+ public IFilterArea getFilterArea() {\r
+ return this;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff