PoojaMoolya at 07:16, 7 May 2019

2019-05-07T07:16:24Z

Nancyvarkey: Created page with "{|Border=1 |'''Timing''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''block diagram creation''' using '''Xfig'''. |- |00:07 |In this tutorial, we..."

2018-08-21T04:17:21Z

Created page with "{|Border=1 |'''Timing''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''block diagram creation''' using '''Xfig'''. |- |00:07 |In this tutorial, we..."

New page

{|Border=1
|'''Timing'''
|'''Narration'''

|-
|00:00
|Welcome to the '''spoken tutorial''' on '''block diagram creation''' using '''Xfig'''.

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|00:07
|In this tutorial, we will explain how to create block diagrams of the type given below.

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| 00:17
| We will see the tools required for this purpose:

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|00:19
|I shall use '''Xfig''', a block diagram manipulation tool.

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|00:24
|I am using version '''3.2''', '''patch level 5.'''

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|00:29
|I will also use the '''terminal''' and a 'pdf' browser.

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|00:37
| I am creating this tutorial on '''Mac OS X'''.

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|00:41
|'''Xfig''' works on '''Linux''' and '''Windows''' also.

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|00:45
|Installation on Linux is the easiest of all.

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|00:50
|The procedure to use Xfig is the same in all three.

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|00:56
| It is recommended to use a three button '''mouse''' for Xfig.

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|01:00
|But one or two button '''mouse''' can also be configured to work.

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|01:07
| The '''user manual''' for Xfig is available on the web.

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|01:16
|Let us see it. We can see the introduction to Xfig in this page.

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|01:23
|We can see the '''Table of Contents''' of this manual, here.

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|01:28
|Let us click on it.

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|01:31
|We can see the details of the people who created Xfig, here.

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|01:36
|Let us see this page.

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|01:40
| I will now explain the '''screen configuration''' for this tutorial.

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|01:46
|It has the '''slides''', Xfig, internet browser – Firefox and the '''terminal'''.

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|01:58
|This is the '''command''' I used to invoke Xfig on Mac.

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|02:04
|These are arranged in an overlapping fashion, for easy switch from one to the other.

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|02:10
|The listener can easily see the switch happening – no need for guess work.

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|02:17
| Let us start with Xfig.

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|02:20
| The left hand side of Xfig worksheet has the '''drawing mode panel'''.

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|02:26
|The buttons on top half of this panel can be used to create different objects.

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|02:33
|The ones in the bottom are used to work with them.

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|02:39
| Using the buttons at the top, one can carry out '''File''' and '''Edit''' operations.

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|02:46
| The space in the centre is known as the '''canvas'''.

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|02:50
|This is where the figure will be created.

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|02:53
| Let us now get started with drawing.

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|02:55
|The first thing I will do is to put the grids on the canvas.

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|03:01
|I do this by clicking on the '''Grid Mode''' button, at the bottom.

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|03:05
|We can choose different grid sizes. I will choose the middle one.

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|03:11
|Grids help align the different objects that we would place.

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|03:16
|In this tutorial, by clicking I mean clicking the left '''mouse button''' and releasing it.

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|03:21
|Similarly, selecting or choosing a button would mean that you have to click it with the '''left mouse'''.

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|03:29
|If a different action is required, I will state it explicitly.

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|03:34
| As our diagram should have a box, let us choose the '''Box''' symbol with sharp corners, from the left hand side panel.

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|03:43
|We will go to the place where we want to place the box.

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|03:50
|We will click the '''mouse''' at this point.

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|03:53
|This selects the north west corner of the box.

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|03:57
|Move the '''mouse''' to the opposite end until the box is of the size we want.

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|04:12
|Once the box is of right size, we can click the '''mouse''' once again.
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|04:16
|The box is now created.
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| 04:18
| We will now explain how to use the '''Edit''' feature of Xfig. Using this, we will increase the thickness of the box.
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|04:26
| Let us press the '''Edit''' button in the left hand panel.
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|04:31
|We see that all the key points of the box are displayed.
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|04:36
|Let us click on any one of these points and thus select the box.
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|04:41
|A dialog-box opens.
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|04:43
|We will take the '''mouse''' to the '''Width''' box.
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|04:47
|Make sure that the '''mouse pointer''' stays within the box.
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|04:51
|Let us delete the default value of 1.
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|04:55
|The contents of this box cannot be changed if the mouse is not inside the box.
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|05:01
|If the mouse moves away at any time of entry in the box, please bring it inside and continue typing.
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|05:07
|Let us now enter 2.
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|05:13
|We click the '''Done'''. Let me show you this.
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|05:17
|Click the '''Done''' and leave the dialog-box.
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|05:20
|We see that the thickness of the box has increased.

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|05:24
| We would now want to enter lines with arrows.

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|05:28
| Let us choose the '''POLYLINE''' button from the left hand side panel.
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|05:34
| The panel at the bottom is known as the '''Attributes panel'''.
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|05:40
|Using the buttons present in this panel, the parameters of each object may be changed.
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|05:45
|The number of buttons change depending on the chosen object.
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|05:52
| Let us select the '''Arrow Mode''' button from the '''attributes panel'''.
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|05:57
|Let us choose the second option in the dialog-box as this would give an arrow at the end point.
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|06:04
|Let us click the '''Arrow Type''' button.
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|06:08
|In the window that appears, we select the arrow head of our choice.
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|06:14
|Let us click at the point where we want the line to start.
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|06:23
|Let us move the mouse to the end point of the desired line.
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|06:31
|Let us now click there with '''middle mouse button'''
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|06:36
|The line is created with an arrow.
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|06:39
|Remember, you have to press the middle button to complete the arrow.
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|06:43
|Not the left or right button.
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|06:45
|If you make a mistake, please click the '''Edit''' and press '''Undo'''.
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|06:52
| Let us draw another line, at the output of the box, by copying.
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|06:59
|Choose the '''COPY''' button from the left hand side panel.
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|07:05
|Choose the line.
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|07:09
|Move the '''mouse''' to the destination and click.
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|07:15
|The line is copied.
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|07:18
| Let us put some text now.
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|07:21
|Let us click the '''Text box''', indicated by T, from the left hand side panel.
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|07:29
| Let us choose the font-size of the text.
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|07:35
|Let us click the '''Text Size''' button from the '''attributes panel''' and obtain a dialog window.
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|07:41
|Let us move the mouse to the value-box and keep the mouse there.
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|07:46
|Let us delete the default value of 12 and enter 16.
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|07:52
|Let us choose the button '''Set'''.
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|07:56
|The dialog-box gets closed and the '''Text Size''' is now shown as 16 in the '''attributes panel'''.
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|08:05
| We will centre align the text.
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|08:08
|Let us click the '''Text Just''' button in the attributes panel.
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|08:13
|A dialog-box opens.
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|08:15
|Let us choose the middle one for centre alignment.
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|08:21
|Let us click at the centre of the box.
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|08:29
| I will type '''Plant''' and click the mouse.
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|08:36
|The text is created.
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|08:38
|I can move the text with the '''Move''' key on the left hand side panel, if required.
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|08:50
| Let us now save this figure.
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|08:52
|Let us click the '''File''' button at the top left hand corner of Xfig, hold and drag the mouse to '''Save''' and release.
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|09:04
|As this is the first time, Xfig asks for the file name.
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|09:09
|We can choose the directory and then the file name.
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|09:12
|Let us type the name as "block" and choose '''Save'''.
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|09:27
|The file gets saved as "block.fig".
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|09:30
|You can see that name at the top.
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|09:34
| Let us now '''export''' the file.
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|09:36
|Let us click the '''File''' button once again, hold and drag the mouse to '''Export'''.
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|09:47
|Click the box next to '''Language''', hold and drag the mouse to '''PDF''' and release the key to select the '''PDF Format'''.
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|09:59
|Now click the '''Export''' button. We get the file "block.pdf".
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|10:05
| Let us open this file through the command '''open block.pdf''' from the terminal.
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|10:18
|We now have the block diagram that we wanted.
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|10:21
| We have completed our objective. We have the figure we want.
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|10:30
| We have an assignment for you.
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|10:33
| Substitute the box with different objects.
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|10:36
|Create a rectangle using '''Polyline'''. Change the size and the direction of the arrows in the figure.
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|10:43
|Move the text, line and box to different locations.
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|10:48
|Export the file in 'eps' format and view it.
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|10:51
|View the file "block.fig" in an '''editor''' and identify different components.
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|10:58
|Create entirely different block diagrams.
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|11:02
| We have now come to the end of this tutorial.
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|11:06
| '''Spoken Tutorial''' is a part of the '''Talk to a Teacher'''project, supported by the National Mission on Education through ICT (NMEICT),MHRD,Government of India.
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|11:18
| More information on this mission is available at:http://spoken-tutorial.org/NMEICT-Intro
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|11:28
| I have downloaded a few more web pages.
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|11:38
| The website for the spoken tutorial project is: http://spoken-tutorial.org/.
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|11:48
|This project is explained by the video available at this link: "What is a Spoken Tutorial".
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|11:57
|At this spoken-tutorial.org/wiki, we have listed the FOSS tools supported by our projects.
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|12:12
|Let us also see the page devoted to '''Xfig'''.
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|12:27
| We welcome your participation and also your feedback. This is Kannan Moudgalya, signing off. Thanks for joining. Goodbye.

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Xfig/C2/Simple-block-diagram/English-timed - Revision history

PoojaMoolya at 07:16, 7 May 2019

Nancyvarkey: Created page with "{|Border=1 |'''Timing''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''block diagram creation''' using '''Xfig'''. |- |00:07 |In this tutorial, we..."