path: root/2023/captions/emacsconf-2023-world--gnu-emacs-a-world-of-possibilities--anand-tamariya--main.vtt

WEBVTT captioned by bhavin192, checked by sachac

NOTE Draw and scribble in GNU Emacs

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Hello. In this video, we will look at

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drawing and scribbling in Emacs using SVG.

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Let's start with `canvas-mode`.

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We will define the width and the height.

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The default is polyline,

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which means you can scribble anything that you want.

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Very handy for taking quick notes.

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Now we will look at

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drawing a triangle using some lines.

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Okay. Now let's draw a circle.

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You can use the mouse to adjust

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the radius of the circle.

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There is some problem with ellipse,

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we will look at it at the end of the video.

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Now let's put up some text,

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a typical "Hello World".

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Size, let's do a 20 font size,

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and we will use the default font family.

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Next, we will look at undoing what we have drawn.

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Just press u for deleting the last drawn object.

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And you can continue pressing

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u for consecutive deletions.

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You can also make a selection of the objects

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on the screen using your mouse and then press u.

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This will delete all the objects in one go.

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Now we are looking at stroke color.

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We will use a brown stroke color

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for drawing our objects.

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Next, let's look at stroke width.

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We will use a width of 5.

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Next, let's fill up the objects with a fill color.

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Now we will look at zoom.

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Use the mouse to select a region and zoom.

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You can also use +, - for zooming in and out.

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Press 0 for resetting the zoom.

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Next, let's save the file,

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and q or Enter for exiting the canvas-mode.

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Now we will open the file in Emacs itself.

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You can see the file,

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you can do Control-c Control-c (`C-c C-c`).

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Finally, we look at ellipse.

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That's all for this video. Thanks!

NOTE SVG Symbols library

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Hello. In this video, we will draw

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schematics using symbols from SVG library in Emacs.

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Press capital L to activate the symbol library

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that you can see on the right hand side,

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and place the symbol on the canvas.

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Let's add another register to this diagram.

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You can press capital R to rotate the symbol.

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Let's place it on the canvas.

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Now we will add a voltage source to the circuit.

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To connect the symbols,

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we will have to use some connecting wires.

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For that, press capital W

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to activate the connection mode.

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Click anywhere on the canvas

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to draw intermediate points, and press Esc

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to exit that particular connection.

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Let's connect other symbols too.

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That's all for this video. Thanks.

NOTE GNU Emacs: A multimedia editor

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Hello. In this video, we will look at

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some basic multimedia editing using Emacs.

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Let's start a media-edit session.

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Let's open a video file.

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The left-hand side is your viewer area,

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and the right-hand side is your track area.

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In the track area, you can use normal Emacs

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text editing movements.

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Now press `C-c r` to refresh the viewer mode

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with the exact time frame.

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Now press SPC to play or pause the video.

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This looks like an interesting point in the video,

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let's track it and split it. Press Enter to do that.

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We will extract some 10 seconds of this video.

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Let's use this.

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Now go here and delete all these lines.

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Let's review our edited clip.

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Looks good! Now press e to export the video.

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Provide an output file name.

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This will use FFmpeg to convert, and you can

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output to any file format supported by FFmpeg.

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Okay. Let's open up shell and view this

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video file in an external video player.

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That's all for this video. Thanks.

NOTE Fill PDF form using GNU Emacs

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Hello. In this video, we will look at

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editing a PDF form using GNU Emacs.

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To start, we have to enable the annotation.

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Then we can use Tab to move forward and Shift+Tab

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to move backwards through the fields.

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To edit a field, we press e.

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So let's edit a text box. We'll call it 'city'.

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Next, we will edit a drop-down.

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Again, press e, and you get a select.

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Use the Minibuffer to select one of the values.

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Let's select 'France'.

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Now let's edit a radio box.

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A checkbox or a radio box can be toggled using t.

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You can disable…

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Now let's save the file, `doc-view-save-form`.

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It will ask for a file name.

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Let's call it `filled1.pdf`. If the file exists,

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it will ask you if you want to overwrite.

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Now let's verify this new file.

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In Firefox, we'll copy this file name, call it filled1.

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Let's verify the values.

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You have city, France and Driving License selected.

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That's all for this video. Thanks.

NOTE Desktop and window management in GNU Emacs

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Hello. In this video, we will look at

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desktop and window management in GNU Emacs.

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We'll start with `task-view`.

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Top row shows all the desktops,

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and rest of the images are the active windows

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in that particular desktop.

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You can tap to select

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and double tap to activate a particular window.

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You can use m to move selected windows

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to any of the desktops at the top.

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Let's check the third desktop.

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Let's bring it back to the second desktop.

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The best part,

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you can select multiple windows

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and form a group by pressing g.

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Then you can select any of the windows

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in this group to activate the complete group.

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That's all for this video. Thanks.

NOTE Screen mirroring in GNU Emacs

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Hello. In this video, we will look at

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screen mirroring using GNU Emacs.

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Run `wfd`. Select an interface.

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Now it will scan for all the available devices

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for screen mirroring.

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I'll select my TV, which is an LG WebOS TV.

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If you don't decline, it will start streaming.

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Let's change some buffer to check the visuals.

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To terminate the session, just click on quit.

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That's all for this video. Thanks.

NOTE Swipe for Text Input in GNU Emacs

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[Using Sweep to swipe and type "as you like it."]

NOTE Formula Editor in GNU Emacs

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[Formula Editor]

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[Typing fractions in the formula]

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[Adding brackets and an exponent]

NOTE Transliteration in Emacs

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[Hindi (Devanagari script) Phonetic typing]

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[Phonetic typing Gujarati, Bangla, Kannada, and Tamil]

NOTE Social Media client - Tumblr, Reddit

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[Browsing Reddit in Emacs]

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[Browsing Tumblr in Emacs]

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[Browsing X (Twitter) in Emacs]

NOTE Comics Builder

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[Generating comic from a text script]

NOTE Matching game

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[Matching color names with color boxes]

NOTE Interactive XPath Builder in GNU Emacs

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[Running `xpath-builder` on an XML file]

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[Filtering `title`, `para`, and `author` from the XML]

NOTE Interactive JSON Builder in GNU Emacs

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[Filtering `father`, `father.name`, `children`

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`children[1]` from a JSON using JSON Builder]

NOTE GNU Emacs as a lightweight IDE (CEDET Semantic): Java - Generate getter/setter

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Hello. In this video, we will look at

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generating getters and setters in Java using Emacs.

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We will run `srecode-getset-dialog`.

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We will get an option to select particular fields,

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you can expand and collapse.

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You can select all or deselect all,

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or you can choose any particular getter.

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So let's do protected version of this. Here you go.

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If you want to generate for other fields,

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you can re-run it.

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You can check the one that you have already

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generated is not there.

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Now select all, and you can see rest of the

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getters and setters have been generated.

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That's all for this video. Thanks.

NOTE Generate C header

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[Generating C headers using `srecode-gen-header`]

NOTE C Rename symbols

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Hello. In this video, we will look at

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renaming method across multiple files in a project.

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Let's start with `semantic-symref-symbol`.

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Now we have the references.

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Let's use the menu to open all these occurrences.

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To rename it, we have to use

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"Rename Symbol in Open hits."

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Let's rename it to underscore 1 (`_1`).

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We will verify it by compiling the project.

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Let's open the `*Messages*` buffer to see the results

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more clearly. No errors.

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That's all for this video. Thanks.

NOTE SQL (offline)

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Hello. In this video, we will look at

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SQL editing with Semantic.

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We will define a schema in this SQL document.

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Let's create a table.

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We get already existing tables

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in the current document.

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It also supports auto-completion of some keywords.

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Now we can do some queries on the tables.

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We have `SELECT` as the keyword or the SQL,

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so we will select the SQL.

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Here we have all the tables existing in this schema.

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We can also use an alias for completions.

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Now let's look at a more complex example.

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We will try to do a join on two tables.

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Let's add a `WHERE` clause.

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Next, let's do insert.

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You can just click on Tab to go to the next field.

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Let's fill in the columns.

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And do a Tab to go to the values

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and add the corresponding values.

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Finally, an update.

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Now we will try to delete this

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with a `WHERE col11 = 4`.

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Lastly, let's try dropping the table.

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That's all for this video. Thanks.

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Slide with the text "Let's Make Computing Personal."