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<html>
<header>
<title>DRAKON Editor v.1.27 Readme</title>
<style>
body { width: 800px; }
</style>
</header>
<body>
<h1>DRAKON Editor 1.27</h1>
<p><b>DRAKON helps people understand programs.</b></p>
<p>Some tutorials can be found in the <b>examples</b> folder. Open the .drn files with the DRAKON Editor.</p>
<h2>FAQ</h2>
<p><b>Q: Where is the "Save" button?</b></p>
<p>A: DRAKON Editor does not have one. It saves your changes as you do them.</p>
<p><b>Q: How can I scroll the main window?</b></p>
<p>A: There are several ways to do it: 1. Drag with the mouse wheel pressed. 2. Scroll your mouse wheel (with and without the Shift key pressed). 3. Drag with both mouse keys pressed.</p>
<p><b>Q: Does DRAKON Editor use a proprietary binary file format?</b></p>
<p>A: No. DRAKON Editor keeps your data in an Sqlite database file. There are free viewers that can browse and edit such files. See <b>docs/drn_file_format.html</b> for details.</p>
<p><b>Q: Can I write real programs with DRAKON Editor?</b></p>
<p>A: Yes! Currently, Java, Processing.org, C#, Plain C, C++, Python, Tcl, Javascript, Lua, Erlang, Verilog and AutoHotkey are supported. Tutorials can be found in the <b>examples/language</b> folders.</p>
<p><b>Q: How to change the fonts?</b></p>
<p>A: To change the screen font, go to <b>File/File properties...</b> and choose the <b>Canvas font</b>.</p>
<p>To change the font in the exported PDF:</p>
<ol>
<li>Put a .ttf file to the <b>fonts</b> folder.</li>
<li>Go to <b>File/File properties...</b> and choose the <b>PDF font</b>.</li>
</ol>
<h2>Installation</h2>
<p>DRAKON Editor does not require any installation besides unzipping. It requires, however, <i>tcl</i> to be present on your computer:</p>
<ul>
<li><b>Windows</b> and <b>Mac OS</b>: download and install ActiveTcl 8.6: <a href="http://www.activestate.com/activetcl/downloads">http://www.activestate.com/activetcl/downloads</a></li>
<li><b>Linux</b>: install the following packages: tcl8.6, tk8.6, tcllib, libsqlite3-tcl, libtk-img.
</ul>
<h2>Shortcuts</h2>
<p>Mac users use <b>Command</b> instead of <b>Control</b> for the following shortcuts.</p>
<table cellpadding="3" border="1">
<tr>
<td><b>Action<b></td><td><b>Shortcut</b></td>
</tr><tr>
<td colspan="2"><center>Canvas</center></td>
</tr><tr>
<td>Scroll/pan</td><td>Move mouse with the wheel or middle button pressed.</td>
</tr><tr>
<td>Scroll/pan up and down</td><td>Mouse wheel.</td>
</tr><tr>
<td>Scroll/pan left and right</td><td>Shift + Mouse wheel.</td>
</tr><tr>
<td>Zoom in and out</td><td>Control + Mouse wheel.</td>
</tr><tr>
<td colspan="2"><center>Editing</center></td>
</tr><tr>
<td><em>Smart</em> mode</td><td>Drag items with the mouse when the Shift key is pressed.</td>
</tr><tr>
<td>Edit text</td><td>Double click on text.</td>
</tr><tr>
<td>Select all</td><td>Control + A</td>
</tr><tr>
<td>Delete selected objects</td><td>Del or Backspace</td>
</tr><tr>
<td>Copy</td><td>Control + C</td>
</tr><tr>
<td>Cut</td><td>Control + X</td>
</tr><tr>
<td>Paste</td><td>Control + V</td>
</tr><tr>
<td>Undo</td><td>Control + Z</td>
</tr><tr>
<td>Redo</td><td>Control + Y</td>
</tr><tr>
<td>Edit diagram description</td><td>Control + D</td>
</tr><tr>
<td colspan="2"><center>Search</center></td>
</tr><tr>
<td>Show/hide search panel</td><td>Control + F</td>
</tr><tr>
<td>Jump to diagram</td><td>Control + G</td>
</tr><tr>
<td>Jump to item</td><td>Control + I</td>
</tr><tr>
<td colspan="2"><center>Diagram</center></td>
</tr><tr>
<td>Verify diagram</td><td>Control + R</td>
</tr><tr>
<td>Generate code</td><td>Control + B</td>
</tr><tr>
<td colspan="2"><center>Adding items</center></td>
</tr><tr>
<td>Action item</td><td>A</td>
</tr><tr>
<td>If item</td><td>I</td>
</tr><tr>
<td>Horizontal line</td><td>H</td>
</tr><tr>
<td>Vertical line</td><td>V</td>
</tr><tr>
<td>Loop start item</td><td>L</td>
</tr><tr>
<td>Loop end item</td><td>E</td>
</tr><tr>
<td>Select item</td><td>S</td>
</tr><tr>
<td>Case item</td><td>C</td>
</tr><tr>
<td>Branch item</td><td>B</td>
</tr><tr>
<td>Address item</td><td>D</td>
</tr><tr>
<td>Insertion item</td><td>N</td>
</tr><tr>
<td>Tidy up</td><td>Control + T</td>
</tr><tr>
<td>Edit text in the selected icon</td><td>F2</td>
</tr><tr>
<td>Edit secondary text</td><td>F3</td>
</tr><tr>
<td>Call hierarchy</td><td>Control + E</td>
</tr>
</table>
<h2>Wish a feature? Report a bug?</h2>
<p>Your feedback is greatly appreciated. Please write to<br/>
<h2>What's new in version 1.27</h2>
<ul>
<li><a href="https://golang.org/">Go language</a> support.</li>
<li>Nice <strong>foreach</strong> code generation for Java, C#, Python, Tcl, Lua, D.</li>
<li>Better boolean short-circuit detection.</li>
<li>C/C++ code generator does not generate redundant <strong>return</strong> statements anymore.</li>
<li>Erlang generator does not emit <strong>throw</strong> when no default clause is present in a <strong>select</strong> statement.</li>
<li>JavaScript code generator: different <strong>foreach</strong> for objects and arrays.</li>
<li>Stricter handling of <strong>select</strong> keyword inside <strong>select</strong> icon.</li>
</ul>
<h2>What's new in version 1.26</h2>
<ul>
<li>Massive improvements to the Erlang code generator: <strong>receive</strong> statement, <strong>select/case</strong> macroicon produces "case X of" statement, visual supervision tree.</li>
<li>A bug fixed in the JavaScript code generator.</li>
<li>Added a warning before export to PNG.</li>
</ul>
<h2>What's new in version 1.25</h2>
<ul>
<li>Syntax highlighting.</li>
<li>Improvements to the C# state machine generator.</li>
</ul>
<h2>What's new in version 1.24</h2>
<ul>
<li>Setting zoom for all diagrams.</li>
<li>Bug fixes, including a problem with Mac shortcuts, AutoHotkey etc.</li>
</ul>
<h2>What's new in version 1.23</h2>
<ul>
<li>Code generation for the AutoHotkey language.</li>
<li>Code generation for the Verilog language.</li>
<li>Code generation for state machines (finite automata) in Lua and JavaScript.</li>
<li>Improvements in the JavaScript generator: better iteration, support for method functions and "closure" namespaces.</li>
<li>State machines and ERIL support in the code generator for the C language.</li>
<li>More flexibility added to "Select-Case" icons. It is now possible to put any condition in a "Case" icon, not just a value. </li>
<li>Other small improvements in code generation for several languages.</li>
<li>Bug fixes.</li>
<li>Switch to Tcl/Tk 8.6. It's a major change in system requirements. DRAKON Editor now needs Tcl/Tk 8.6 to run. Tcl/Tk 8.5 is not supported any more.</li>
</ul>
<h2>What's new in version 1.22</h2>
<ul>
<li>A bug fix related to inline comment icons in Erlang diagrams.</li>
<li>The content of the "if" icon in Erlang is not limited to the guard syntax any more.</li>
<li>State-machine support for Erlang: gen_fsm-based and standalone state-machines.</li>
<li>D language support.</li>
</ul>
<h2>What's new in version 1.21</h2>
<ul>
<li>State-machine (finite automata) support for C# code generation.</li>
<li>ERIL language support for C# and Tcl code generation. (Entity-relationship and inheritance diagrams.)</li>
<li>Hyperlinks in text. (Available through context meny, "Links".)</li>
<li>Minor bug fixes.</li>
</ul>
<h2>What's new in version 1.20</h2>
<ul>
<li>Bug fixes.</li>
<li>Call hierarchy.</li>
<li>Added support for Processing.org programming language.</li>
<li>Go to branch within a silhouette diagram.</li>
<li>The color of icons can be changed.</li>
</ul>
<h2>What's new in version 1.19</h2>
<ul>
<li>Automatic width for "If" icons has been reduced. Icons take less diagram space.</li>
<li>Modal dialogs improved on Linux.</li>
</ul>
<h2>What's new in version 1.18</h2>
<ul>
<li>DRAKON Editor now supports the full set of DRAKON icons.</li>
<li>Uniform spacing rules in the <b>advanced</b> editing mode (with Shift pressed).</li>
<li>Entity-Relationship diagram type added.</li>
<li>Canvas can be scrolled with mouse drag when both mouse buttons are pressed.</li>
<li>Added more shortcuts: F2 edits primary text, F3 edits secondary text. </li>
</ul>
<h2>What's new in version 1.17</h2>
<ul>
<li>Code generation: warnings removed for C# and Lua compilers.</li>
<li>User can now define custome text instead of "YES", "NO" and "End".</li>
<li>Color themes can be changed from Global settings.</li>
<li>Icon widths get adjusted automatically for the whole skewer after the text is changed for a single icon.</li>
<li>Note comments got a better visual style.</li>
<li>Loop end icons can have text.</li>
</ul>
<h2>What's new in version 1.15</h2>
<ul>
<li>Fixed a bug in the code generator.</li>
<li>Some metaprogramming features for the C language.</li>
</ul>
<h2>What's new in version 1.14</h2>
<ul>
<li>Fixed Lua source code generator.</li>
<li>Double mouse wheel click invokes View / See All.</li>
</ul>
<h2>What's new in version 1.13</h2>
<ul>
<li>Code generation for Lua language.</li>
</ul>
<h2>What's new in version 1.12</h2>
<ul>
<li>Open/Save file dialogs for .drn files and for export remember the last directory.</li>
<li>Inserting "if", "branch", "select" and "loop" items made easier.</li>
<li>Ctrl-X, Ctrl-C, Ctrl-V, Ctrl-A shortcuts fixed for non-English keyboard layouts.</li>
<li>Added menu items: Edit/Tidy up, Edit/Tidy up all diagrams. The shortcut for Tidy up is Ctrl-T.</li>
</ul>
<h2>What's new in version 1.11</h2>
<ul>
<li>Text in <b>Action</b> and <b>Insertion</b> icons is now left-aligned.</li>
<li>Diagrams now look neat and tidy. The <b>Edit/Adjust icon sizes</b> menu command sets equal width to the icons on the same vertical.</li>
<li>Fixed the bug about extracting class names in C++.</li>
<li>Qt support: now you can explicitly mark the diagram as a signal or a slot (see QtC++ folder).</li>
</ul>
<h2>What's new in version 1.10</h2>
<ul>
<li>A few minor usability improvements.</li>
<li>Javascript language support.</li>
<li>Erlang language support.</li>
</ul>
<h2>What's new in version 1.9</h2>
<ul>
<li>Fast insertion of items using keyboard shortcuts.</li>
<li>The list of previously opened files.</li>
<li>Custom fonts.</li>
<li>Java language support.</li>
<li>C# language support.</li>
<li>Code generation for Python and Tcl without <b>goto</b> simulation.</li>
</ul>
<h2>What's new in version 1.8</h2>
<ul>
<li>The performance of the Smart mode has been significantly improved.</li>
</ul>
<h2>What's new in version 1.7</h2>
<ul>
<li>"Smart" editing mode.<br />To activate the Smart mode, hold SHIFT while dragging
items around on the canvas.<br />
When you drag an item in the Smart mode, all connected lines and items also move consistently.
The diagram structure is preserved.</li>
</ul>
<h2>What's new in version 1.6</h2>
<ul>
<li>Fixed a code generation bug (occuring with Insertion icons).</li>
<li>Resolved Ubuntu 11.x incompatibility issues.</li>
</ul>
<h2>What's new in version 1.5</h2>
<ul>
<li>More improvements in the interface:</li>
<ul>
<li>If you grab a line by its end and drag, all the connected items will also move.</li>
<li>The flat list of diagrams has been replaced with a tree.</li>
<li>"Find all references", "Go to definition", "Jump to diagram", "Jump to item" etc.</li>
</ul>
<li>Code generation for:</li>
<ul>
<li>Plain C</li>
<li>C++</li>
<li>Python 2.x and 3.x</li>
<li>Tcl</li>
</ul>
</ul>
<h2>What's new in version 1.4</h2>
<ul>
<li>Verification according to the rules of the DRAKON language (DRAKON-1).</li>
<li>Creation of silhouette diagrams made easier.</li>
<li>Address icons can be directed towards a branch using the context menu.</li>
<li>Address icons update their text when the target branch gets renamed.</li>
</ul>
<h2>What's new in version 1.3</h2>
<ul>
<li>A massive amount of usability improvements.</li>
<li>Export to PNG.</li>
<li>Export to PDF with colors.</li>
</ul>
<h2>What's new in version 1.2</h2>
<ul>
<li>Zoom.</li>
<li>Search.</li>
<li>Colored icons.</li>
<li>Many user interface improvements.</li>
</ul>
<h2>License</h2>
<p>DRAKON Editor is <a href="http://en.wikipedia.org/wiki/Public_domain">PUBLIC DOMAIN</a> except some third-party components (pdf4tcl, Liberation fonts).</p>
<h2>Authors</h2>
<p>Stepan Mitkin, Alexander Ilyin, Maas-Maarten Zeeman, Vasil Dyadov, Vasili Bachiashvili.</p>
<p><a href="http://drakon-editor.sourceforge.net/">http://drakon-editor.sourceforge.net/</a></p>
<p>10 March 2016.</p>
</body>
</html>