support/blog/2014/11/21/screenshots-with-rcptt.html - gerrit/www.eclipse.org/rcptt - Git at Google

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           <h2>Screenshots for documentation</h2>
 	  <small>Nov, 21, 2014 by Ivan Inozemtsev</small>        </header>
         <div>

 <p>
   This year on EclipseCon Europe Jeremie Bresson pointed me to a <a href="http://model-driven-blogging.blogspot.ru/2009/03/shuangxi-effect-ui-testing-and.html">nice Cédric Brun's article</a> on how to use SWTBot to generate screenshots for documentation, and asked whether something like this is possible with RCPTT.
 </p>

 <p>
   And the answer is &ndash; yes, indeed! Actually, I never thought about this use-case before, but we have a <a href="http://download.eclipse.org/rcptt/release/1.5.4/doc/ecl/index.html#save-screenshot">save-screenshot</a> command, which can save a screenshot of a control into a file. So, here's how to save screenshots for new plugin project wizard:
 </p>


 <pre data-line="5,10,14,20"><code class="language-ecl">&#x200b;get-view "Package Explorer" | get-tree | get-menu "New/Plug-in Project" | click

 with [get-window "New Plug-in Project"] {
   get-editbox -after [get-label "Project name:"] | set-text "org.sample.view"
   get-object | save-screenshot "/tmp/tmp/demo/first-page.png"
   get-button "Next >" | click

   get-group Properties | get-editbox -after [get-label "Name:"]
     | set-text "Sample View Plugin"
   get-object | save-screenshot "/tmp/tmp/demo/second-page.png"
   get-button "Next >" | click

   get-table | select "Plug-in with a view"
   get-object | save-screenshot "/tmp/tmp/demo/third-page.png"
   get-button "Next >" | click
 }

 with [get-window "New plug-in project with a sample view"] {
   get-button "Tree viewer" | click
   get-object | save-screenshot "/tmp/tmp/demo/fourth-page.png"
   get-button Finish | click
 }
 </code></pre>


 <p>
   This is just a recorded test case with manual insertion of <code class="language-ecl">&#x200b;get-object | save-screenshot &quot;/path/to/screenshot.png&quot;</code> snippets in interesting parts. Here <code class="language-ecl">&#x200b;get-object</code> takes an SWT object from RCPTT selector command (since we are in <code class="language-ecl">&#x200b;with</code> block, we are taking an SWT object from a window here), and <code class="language-ecl">&#x200b;save-screenshot</code> takes bounds of given control and saves a screenshot to given path. Here are the images, saved as an execution result of the script above:
 </p>
 <!-- break -->

 <br/>
 <div class="row">
   <div class="col-md-3">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/1-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/1-page.png" /></a>
   </div>
   <div class="col-md-3">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/2-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/2-page.png" /></a>
   </div>
   <div class="col-md-3">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/3-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/3-page.png" /></a>
   </div>
   <div class="col-md-3">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/4-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/4-page.png" /></a>
   </div>
 </div>


 <br/>
 <p>Note that RCPTT automatically brings an application-under-test in front before taking a screenshot, to make sure that everything is visible.</p>

 <h3>Individual controls</h3>
 <p>But what if I want to take a screenshot of a tree, or toolbar, or editor? That's also possible, we just need to use another input for <code class="language-ecl">&#x200b;get-object | save-screenshot</code>:</p>


 <pre ><code class="language-ecl">&#x200b;get-button "New.*" | get-object | save-screenshot ...
 get-editor "SampleView.java" | get-text-viewer | get-object | save-screenshot ...
 get-view Outline | get-tree | get-object | save-screenshot ...
 </code></pre>


 <div class="row">
   <div class="col-md-4">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarButton.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarButton.png" /></a>
   </div>

   <div class="col-md-4">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/editor.png"><img width="300" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/editor.png" /></a>
   </div>

   <div class="col-md-4">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/tree.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/tree.png" /></a>
   </div>
 </div>
 <br/>
 <p>By using <a href="http://download.eclipse.org/rcptt/release/1.5.4/doc/ecl/index.html#invoke">invoke</a> command to call SWT's <code>Control.getParent()</code> method, it is possible to get a screenshot of a part of a toolbar, or the whole toolbar:</p>
 <pre ><code class="language-ecl">&#x200b;
 get-button "Save All.*" | get-object | invoke getParent | save-screenshot ...

 get-button "Save All.*" | get-object
    | invoke getParent
    | invoke getParent
    | invoke getParent
    | save-screenshot ...
 </code></pre>


 <div class="row">
   <div class="col-md-6">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbar.png"><img style="max-width:100%" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbar.png" /></a>
   </div>

   <div class="col-md-6">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarAll.png"><img style="max-width:100%" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarAll.png" /></a>
   </div>
 </div>

 <h3>View and editor parts</h3>
 <p>Screenshots of a Java Editor and a tree in Outline view above don't look very realistic -- they don't include a name of View/Editor. In order to include it, ideally we should take bounds of a tab folder, associated with view or editor stack. RCPTT does not have built-in commands to find a tab folder by view/editor (as there is no practical need for that). However, it is possible to write a handy procedure to iterate through all tab folders in an application and find the one with an active tab we need:</p>


 <pre ><code class="language-ecl">&#x200b;proc "find-tab-folder" [val activePage] {
   loop [val index [int 0]] {
     let [val folder [get-tab-folder -index $index]] {
       let [val folderActivePage [$folder | get-property activePage -raw]] {
         if [$folderActivePage | eq $activePage] {
           $folder //returning result
         } -else { recur [$index | plus 1] }
       }
     }
   }
 }

 find-tab-folder "SampleView.java" | get-object | save-screenshot &#8230;
 find-tab-folder "Outline" | get-object | save-screenshot &#8230;
 </code></pre>


 <br/>
 <p>And here's a result:</p>
 <div class="row">
   <div class="col-md-6">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/editorPart.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/editorPart.png"/></a>
   </div>
   <div class="col-md-6">
     <a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/treePart.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/treePart.png"/></a>
   </div>
 </div>

 <h3>Reproducible screenshot sizes</h3>

 <p>For a real-life usage, it's highly important to ensure that screenshot sizes are always the same. For dialogs, this can be done like this:</p>
 <pre ><code class="language-ecl">&#x200b;// calling Shell.setSize(x, y) via reflection:
 get-window "New Plug-in Project" | get-object | invoke setSize 400 600
 </code></pre>


 <p>For the size of view and edit parts thigs are trickier &ndash; there's no way to affect it directly, but at least it is possible to get reproducible sizes by setting the size of main workbench window and then resetting a perspective:</p>


 <pre ><code class="language-ecl">&#x200b;get-eclipse-window | get-object | invoke setSize 900 600
 get-menu "Window/Reset Perspective..." | click
 </code></pre>


 That way, it is possible to automatically generate screenshots of the for different versions of an application on different operating systems.

 <h3>What's next?</h3>

 To try this at home, follow these steps:
 <ul>
   <li><a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/screenshots.zip">download</a> a sample project</li>
   <li>Import it as an existing project into RCPTT IDE (until 1.5.4 is out, because of issue <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=450277">#450277</a> it is better to use nightly build from <a href="http://eclipse.org/rcptt/download">download page</a>)</li>
   <li>Use any Eclipse package which includes PDE tools as an AUT</li>
   <li>Launch tests from attached project</li>
   <li>Go to your home folder and examine Documents/rcptt-screenshots folder
 </ul>
         </div>
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	<article>
	<header>
	<h2>Screenshots for documentation</h2>
	<small>Nov, 21, 2014 by Ivan Inozemtsev</small> </header>
	<div>

	<p>
	This year on EclipseCon Europe Jeremie Bresson pointed me to a <a href="http://model-driven-blogging.blogspot.ru/2009/03/shuangxi-effect-ui-testing-and.html">nice Cédric Brun's article</a> on how to use SWTBot to generate screenshots for documentation, and asked whether something like this is possible with RCPTT.
	</p>

	<p>
	And the answer is – yes, indeed! Actually, I never thought about this use-case before, but we have a <a href="http://download.eclipse.org/rcptt/release/1.5.4/doc/ecl/index.html#save-screenshot">save-screenshot</a> command, which can save a screenshot of a control into a file. So, here's how to save screenshots for new plugin project wizard:
	</p>


	<pre data-line="5,10,14,20"><code class="language-ecl">get-view "Package Explorer" \| get-tree \| get-menu "New/Plug-in Project" \| click

	with [get-window "New Plug-in Project"] {
	get-editbox -after [get-label "Project name:"] \| set-text "org.sample.view"
	get-object \| save-screenshot "/tmp/tmp/demo/first-page.png"
	get-button "Next >" \| click

	get-group Properties \| get-editbox -after [get-label "Name:"]
	\| set-text "Sample View Plugin"
	get-object \| save-screenshot "/tmp/tmp/demo/second-page.png"
	get-button "Next >" \| click

	get-table \| select "Plug-in with a view"
	get-object \| save-screenshot "/tmp/tmp/demo/third-page.png"
	get-button "Next >" \| click
	}

	with [get-window "New plug-in project with a sample view"] {
	get-button "Tree viewer" \| click
	get-object \| save-screenshot "/tmp/tmp/demo/fourth-page.png"
	get-button Finish \| click
	}
	</code></pre>


	<p>
	This is just a recorded test case with manual insertion of <code class="language-ecl">get-object \| save-screenshot "/path/to/screenshot.png"</code> snippets in interesting parts. Here <code class="language-ecl">get-object</code> takes an SWT object from RCPTT selector command (since we are in <code class="language-ecl">with</code> block, we are taking an SWT object from a window here), and <code class="language-ecl">save-screenshot</code> takes bounds of given control and saves a screenshot to given path. Here are the images, saved as an execution result of the script above:
	</p>
	<!-- break -->

	<br/>
	<div class="row">
	<div class="col-md-3">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/1-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/1-page.png" /></a>
	</div>
	<div class="col-md-3">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/2-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/2-page.png" /></a>
	</div>
	<div class="col-md-3">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/3-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/3-page.png" /></a>
	</div>
	<div class="col-md-3">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/4-page.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/4-page.png" /></a>
	</div>
	</div>


	<br/>
	<p>Note that RCPTT automatically brings an application-under-test in front before taking a screenshot, to make sure that everything is visible.</p>

	<h3>Individual controls</h3>
	<p>But what if I want to take a screenshot of a tree, or toolbar, or editor? That's also possible, we just need to use another input for <code class="language-ecl">get-object \| save-screenshot</code>:</p>


	<pre ><code class="language-ecl">get-button "New.*" \| get-object \| save-screenshot ...
	get-editor "SampleView.java" \| get-text-viewer \| get-object \| save-screenshot ...
	get-view Outline \| get-tree \| get-object \| save-screenshot ...
	</code></pre>



	<div class="row">
	<div class="col-md-4">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarButton.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarButton.png" /></a>
	</div>

	<div class="col-md-4">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/editor.png"><img width="300" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/editor.png" /></a>
	</div>

	<div class="col-md-4">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/tree.png"><img width="200" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/tree.png" /></a>
	</div>
	</div>
	<br/>
	<p>By using <a href="http://download.eclipse.org/rcptt/release/1.5.4/doc/ecl/index.html#invoke">invoke</a> command to call SWT's <code>Control.getParent()</code> method, it is possible to get a screenshot of a part of a toolbar, or the whole toolbar:</p>
	<pre ><code class="language-ecl">
	get-button "Save All.*" \| get-object \| invoke getParent \| save-screenshot ...

	get-button "Save All.*" \| get-object
	\| invoke getParent
	\| invoke getParent
	\| invoke getParent
	\| save-screenshot ...
	</code></pre>


	<div class="row">
	<div class="col-md-6">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbar.png"><img style="max-width:100%" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbar.png" /></a>
	</div>

	<div class="col-md-6">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarAll.png"><img style="max-width:100%" src="https://www.eclipse.org/rcptt/shared/img/blog/shots/toolbarAll.png" /></a>
	</div>
	</div>

	<h3>View and editor parts</h3>
	<p>Screenshots of a Java Editor and a tree in Outline view above don't look very realistic -- they don't include a name of View/Editor. In order to include it, ideally we should take bounds of a tab folder, associated with view or editor stack. RCPTT does not have built-in commands to find a tab folder by view/editor (as there is no practical need for that). However, it is possible to write a handy procedure to iterate through all tab folders in an application and find the one with an active tab we need:</p>


	<pre ><code class="language-ecl">proc "find-tab-folder" [val activePage] {
	loop [val index [int 0]] {
	let [val folder [get-tab-folder -index $index]] {
	let [val folderActivePage [$folder \| get-property activePage -raw]] {
	if [$folderActivePage \| eq $activePage] {
	$folder //returning result
	} -else { recur [$index \| plus 1] }
	}
	}
	}
	}

	find-tab-folder "SampleView.java" \| get-object \| save-screenshot …
	find-tab-folder "Outline" \| get-object \| save-screenshot …
	</code></pre>


	<br/>
	<p>And here's a result:</p>
	<div class="row">
	<div class="col-md-6">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/editorPart.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/editorPart.png"/></a>
	</div>
	<div class="col-md-6">
	<a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/treePart.png"><img src="https://www.eclipse.org/rcptt/shared/img/blog/shots/treePart.png"/></a>
	</div>
	</div>

	<h3>Reproducible screenshot sizes</h3>

	<p>For a real-life usage, it's highly important to ensure that screenshot sizes are always the same. For dialogs, this can be done like this:</p>
	<pre ><code class="language-ecl">// calling Shell.setSize(x, y) via reflection:
	get-window "New Plug-in Project" \| get-object \| invoke setSize 400 600
	</code></pre>


	<p>For the size of view and edit parts thigs are trickier – there's no way to affect it directly, but at least it is possible to get reproducible sizes by setting the size of main workbench window and then resetting a perspective:</p>


	<pre ><code class="language-ecl">get-eclipse-window \| get-object \| invoke setSize 900 600
	get-menu "Window/Reset Perspective..." \| click
	</code></pre>


	That way, it is possible to automatically generate screenshots of the for different versions of an application on different operating systems.

	<h3>What's next?</h3>

	To try this at home, follow these steps:
	<ul>
	<li><a href="https://www.eclipse.org/rcptt/shared/img/blog/shots/screenshots.zip">download</a> a sample project</li>
	<li>Import it as an existing project into RCPTT IDE (until 1.5.4 is out, because of issue <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=450277">#450277</a> it is better to use nightly build from <a href="http://eclipse.org/rcptt/download">download page</a>)</li>
	<li>Use any Eclipse package which includes PDE tools as an AUT</li>
	<li>Launch tests from attached project</li>
	<li>Go to your home folder and examine Documents/rcptt-screenshots folder
	</ul>
	</div>
	<p class="categories">
	Categories:
	<a href="https://www.eclipse.org/rcptt/blog/categories/howtos">howtos</a> </p>

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