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| <title>Eclipse Project 4.14 - New and Noteworthy</title> |
| </head> |
| |
| <body> |
| <h2>Platform and Equinox API</h2> |
| <ul> |
| <li><a href="#Platform">Platform Changes</a></li> |
| <li><a href="#SWT">SWT Changes</a></li> |
| </ul> |
| |
| <!-- ****************** START OF N&N TABLE****************** --> |
| <table class="news"> |
| <colgroup> |
| <col class="title" /> |
| <col /> |
| </colgroup> |
| <tbody> |
| <!-- ******************** Platform ********************** --> |
| <tr> |
| <td id="Platform" class="section" colspan="2"><h2>Platform Changes</h2></td> |
| </tr> |
| |
| <tr id="text-selection-no-ui-thread"> <!-- https://bugs.eclipse.org/547683 --> |
| <td class="title">Get TextViewer selection out of UI thread</td> |
| <td class="content"> |
| A new extension interface <b><code>ITextViewerExtension9</code></b> was added to <code>ITextViewer</code>. This extension interface |
| adds a new method <code>getLastKnownSelection</code> to get the text selection for the viewer, with constraint (by API contract) that this method |
| can be called <em>outside of the UI thread</em>. |
| <p>This method allows to build extensions (like completion proposal computers, hovers and others) that can |
| work outside of the UI thread, as a separate job, without blocking the UI but that still require access to the |
| text selection.</p> |
| <p>The <code>TextViewer</code> concrete implementation (used by most textual editors) has been |
| enriched to implement this interface and provide associated method.</p> |
| <p><b>NOTE:</b> Since selection can change in the UI thread while this method may be running in the non-UI thread, it can |
| happen that the <code>getLastKnownSelection</code> method returns a selection that's no more up-to-date. Special care should be |
| taken if having the very current selection is important in your code; but experience with adoption of this method |
| in typical cases has shown that this is rarely the case, and that if your code needs to react to selection changes, |
| using an <code>ISelectionListener</code> should be preferred.</p> |
| </td> |
| </tr> |
| |
| <tr id="quick-assist-extension-point"> <!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=544448 --> |
| <td class="title">Quick assist extension point for Generic Editor</td> |
| <td class="content"> |
| A new extension point <b><code>org.eclipse.ui.genericeditor.quickAssistProcessors</code></b> has been added to allow contributing to the quick assist in the generic editor. |
| <p> |
| The following example shows how to contribute to the Generic Editor's quick assist: |
| </p> |
| <pre><extension point="org.eclipse.ui.genericeditor.quickAssistProcessors"> |
| <quickAssistProcessor |
| class="org.eclipse.ui.genericeditor.tests.contributions.MockQuickAssistProcessor" |
| contentType="org.eclipse.ui.genericeditor.tests.content-type"> |
| </quickAssistProcessor> |
| </extension></pre> |
| The contributing extension must provide a class which implements <code>org.eclipse.jface.text.quickassist.IQuickAssistProcessor</code>. |
| </td> |
| </tr> |
| |
| <tr id="display-helper-lambda"> <!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=551211 --> |
| <td class="title">Easier usage of DisplayHelper</td> |
| <td class="content"> |
| The <b><code>org.eclipse.ui.tests.harness.util.DisplayHelper</code></b> that's often conveniently |
| used in tests to automate wait on asynchronous UI results now offers a more concise |
| syntax, relying on the new static <code>waitForCondition(display, timeout, condition)</code> |
| method. |
| <p>Former constructs like:</p> |
| <pre> |
| assertTrue(new DisplayHelper() { |
| @Override |
| public void condition() { |
| return some.boolean() && expression; |
| } |
| }.waitForCondition(display, 1000)); |
| </pre> |
| can now be replaced by: |
| <pre> |
| assertTrue(DisplayHelper.waitForCondition(display, 1000, () -> some.boolean() && expression)) |
| </pre> |
| </td> |
| </tr> |
| |
| <tr id="selection_listener_factory"> <!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=550329 --> |
| <td class="title">Selection Listener Factory</td> |
| <td class="content"> |
| A new API was introduced to make participants of the Selection framework more efficient. |
| <p> |
| Selection listeners are notified of all selections in the Workbench. This |
| means that the listener is always required to filter unwanted selections. In |
| addition, the listener has to make sure not to waste cycles in the UI |
| thread, for instance, not update the UI while it is invisible. |
| </p><p> |
| This filtering generally requires <i>a lot</i> of boilerplate code while, |
| ideally, you only want to receive selections that are of interest. |
| </p><p> |
| This factory takes care of many practical filtering scenarios by allowing the |
| creation of an intermediate selection service that only calls you back with |
| selections you can work with. |
| </p><p> |
| See usage examples in the <a href="https://git.eclipse.org/r/plugins/gitiles/platform/eclipse.platform.ui/+/master/bundles/org.eclipse.ui.workbench/Eclipse%20UI/org/eclipse/ui/SelectionListenerFactory.java#30">SelectionListenerFactory</a> documentation. |
| </p> |
| </td> |
| </tr> |
| |
| <tr id="update-part-icon"> <!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=475357 --> |
| <td class="title">Update the icon of a Part at runtime</td> |
| <td class="content"> |
| You can now update the icon of a Part in a part stack by setting its icon URI at any time. There is no need to modify the part's transient data anymore. |
| </td> |
| </tr> |
| <!-- ******************** End of Platform ********************** --> |
| |
| <!-- *********************** SWT *********************** --> |
| <tr> |
| <td id="SWT" class="section" colspan="2"><h2>SWT Changes</h2></td> |
| </tr> |
| <tr id="toolitem-disabled-image"> <!-- https://bugs.eclipse.org/302918 --> |
| <td class="title">Disabled toolbar items on GTK</td> |
| <td class="content"> |
| <b><code>ToolItem.setDisabledImage()</code></b> is now fully implemented for ToolItem on Linux/GTK, and greatly improves the ability |
| to distinguish a disabled ToolItem from an enabled one. |
| <p>Below is a screenshot with disabled toolbar buttons; |
| the left toolbar shows the current implementation, the right one the shows the old implementation.</p> |
| <p><img src="images/toolitem-disabled-comparison.png" alt="ToolBar comparison"/></p> |
| <p> |
| This API already worked on Windows and macOS. |
| </p> |
| </td> |
| </tr> |
| |
| <tr id="image-svg-gtk"> <!-- https://bugs.eclipse.org/545804 --> |
| <td class="title">SVG image API added and implemented on GTK</td> |
| <td class="content"> |
| SWT now has an API to support SVG images, <b><code>SWT.IMAGE_SVG</code></b>, which allows <code>ImageLoader</code> to load them. |
| <p>Currently this functionality is only implemented on Linux/GTK, on all other platforms the API is a HINT.</p> |
| </td> |
| </tr> |
| |
| <tr id="ccombo-alignment"> <!-- https://bugs.eclipse.org/349112 --> |
| <td class="title">Set alignment for CCombo</td> |
| <td class="content"> |
| The <code>CCombo</code> widget can now align the text field content, the alignment is not applied to the drop-down list. |
| <p>The alignment for <code>CCombo</code> can be specified as a style bit in the constructor or using the <code>CCombo.setAlignment()</code> method. |
| You can also get the value of the <code>CCombo</code>'s alignment using <code>getAlignment()</code> method.</p> |
| <p>The below screen-shot shows possible <code>CCombo</code> alignments:</p> |
| <p><img src="images/ccombo-alignment.png" alt="Aligned CCombo widgets"/></p> |
| </td> |
| </tr> |
| <!-- *********************** End of SWT *********************** --> |
| |
| </tbody> |
| </table> |
| <!-- ****************** END OF N&N TABLE ****************** --> |
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