Sandhya.np14 at 11:08, 30 January 2019

2019-01-30T11:08:51Z

Nancyvarkey: Created page with "{| border=1 |'''Time''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''feedback diagram creation''' using '''Xfig'''. |- |00:07 |In the spoken tutori..."

2018-08-21T04:18:40Z

Created page with "{| border=1 |'''Time''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''feedback diagram creation''' using '''Xfig'''. |- |00:07 |In the spoken tutori..."

New page

{| border=1
|'''Time'''
|'''Narration'''

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

|-
|00:07
|In the spoken tutorial on '''block diagram creation''', we created the diagram shown here.

|-
|00:14
|We will refer to it as the '''blocks tutorial'''.

|-
|00:18
|Please master the '''blocks tutorial''' before starting the current one.

|-
|00:22
|In this tutorial, we will explain how to create block diagrams of the type shown on this page.

|-
|00:31
|I shall use '''Xfig''' version '''3.2''', '''patch level 5'''.

|-
|00:37
|We will begin with "block.fig" created in the '''blocks''' tutorial.

|-
|00:43
|Let us go to '''Xfig'''.

|-
|00:47
|Let us choose the '''File''', then '''Open'''.

|-
|00:52
|In the entry box, we can enter "block" and press '''Open'''. Or double-click on “block.fig”.

|-
|01:04
|Using the '''Save as''' option on '''File''', we will save this figure as "feedback".

|-
|01:24
|We now have the file "feedback.fig".

|-
|01:28
|Let us put the grids on by clicking on the '''Grids'''.

|-
|01:34
|The scroll bar on the right can be used to move the canvas up or down.

|-
|01:41
|The role of each '''mouse button''' is shown on the top right hand side.

|-
|01:46
|This role depends on the activity.

|-
|01:49
|To illustrate this, let me take the '''mouse''' to the vertical '''scroll bar'''.

|-
|01:55
|Observe the comment next to the '''left button'''.

|-
|01:59
|I cannot move the '''mouse''' to show this. It is because, the role of the buttons will change if I move the cursor away from the scroll bar.

|-
|02:08
|The left-button moves the canvas up and the right-button moves it down.

|-
|02:17
|Instead of clicking the left or right button, we can also click the centre button, hold and drag the canvas up or down.

|-
|02:31
|In a similar way, you can move the canvas to the right or left, using the '''scroll bar''' on the top. Left, right..

|-
|02:44
| I will now move the box to the centre by clicking the middle button, holding and dragging the canvas to the centre.

|-
|02:57
| As I release the '''mouse''', the box gets moved to the centre.

|-
|03:03
| Let us now create the feedback diagram starting from this block.

|-
|03:08
| Let us copy this box.

|-
|03:13
| Click on the box and select it.

|-
|03:16
| Move the '''mouse''' to the new location and click.

|-
|03:27
| Let us now put some text.

|-
|03:29
| Let us click the text-box, indicated by T, from the left hand side panel.

|-
|03:37
| Let us choose the size of the text.

|-
|03:43
| Move the '''mouse''' to the value-box and enter 16.

|-
|03:51
| Click '''Set'''.

|-
|03:53
| Let us click the '''Text Just''' button in the '''attributes''' panel.

|-
|04:02
| Let us choose the centre alignment.

|-
|04:05
| Let us click at the centre of the first box.

|-
|04:11
| Sorry, I did not choose the correct position.

|-
|04:15
| I will click at a different location to move the cursor away.

|-
|04:19
| I will then click at the correct position.

|-
|04:27
| Let us now type the text “Control” and click the mouse.

|-
|04:35
| We would now want to enter some more lines with arrows.

|-
|04:40
| Let us choose the '''POLYLINE''' button.

|-
|04:43
|Let us select the '''Arrow Mode''' button from the '''attributes panel''' and select the second option.

|-
|04:53
|Let us click the '''Arrow Type''' button and an arrow head.

|-
|05:00
| Let us click at the point where we want the line to start.

|-
|05:08
| Let us move the '''mouse''' to the end point of the desired line.

|-
|05:14
| Let us now click there with '''middle mouse button'''.

|-
|05:20
| The line is created with an arrow.

|-
|05:25
| I want to place a circle.

|-
|05:27
| Let us choose the '''circle''' on the left from the left hand side panel.

|-
| 05:33
| We will place it to the left of the first box.

|-
| 05:37
| Click the mouse. As I move the mouse, the circle becomes bigger.

|-
| 05:47
| When we get the right size, let us release the '''mouse button'''.

|-
| 05:54
| Oops, the circle is larger than what I wanted.

|-
| 05:57
| I can '''undo''' this operation, using the '''Edit''' button at the top.

|-
| 06:02
| We can also delete this object, using the '''Delete''' button on the left hand panel.

|-
| 06:10
| Let us do that now.

|-
| 06:14
| A skeleton with '''cross hairs''' appears.

|-
| 06:18
| All key points of all objects also appear.

|-
| 06:22
| Move the cross hairs to a key point that indicates the circle and click.

|-
| 06:32
| In case a wrong object is deleted, no need to panic.

|-
| 06:35
| You can '''undo''' it: Click the '''Edit''' button, hold, go to '''Undo''' and release the mouse.

|-
| 06:44
| If some objects are closely placed, you may have difficulty in choosing them.

|-
| 06:49
| You can solve this through the '''zoom''' feature.

|-
| 06:55
| Click the '''View''' button on the top left hand side, hold and choose one of the zoom options.

|-
| 07:00
| Let me release the mouse at '''Zoom to fit the canvas'''.

|-
| 07:04
| Now it is easy to discriminate between the objects.

|-
| 07:08
| Let me delete the circle now.

|-
| 07:12
| Let me '''unzoom'''.

|-
| 07:20
| I will move the diagram to the centre with the use of scroll buttons.

|-
| 07:35
| I do not like to leave the '''delete''' symbol on because I can accidentally delete something else.

|-
| 07:41
| I can change this by choosing any other button.

|-
| 07:44
| Let me choose the left circle.

|-
| 07:47
| Let me redraw the circle.

|-
| 08:00
| I want to put another line from this line.

|-
| 08:04
| For this, we will first put a '''dot''' on the line.

|-
| 08:07
| Let us click the '''Library''', on the left hand side panel.

|-
| 08:11
| The '''Library''' is indicated by a stack of books.

|-
| 08:15
| A '''dialog window''' opens.

|-
| 08:17
| Next to the Library, it says '''"None Loaded"'''.

|-
| 08:20
| Let us click and hold.

|-
| 08:22
| A list of available libraries appears.

|-
| 08:25
| Move the mouse to the ''''Logic' library''' and release the mouse.

|-
|08:31
| Let us choose the '''small dot''' by double clicking on it.

|-
| 08:36
| The '''dialog window''' gets closed.

|-
| 08:38
| We see a cross hair along with the chosen small dot.

|-
| 08:42
| Let us place the dot on the line by clicking.

|-
| 08:51
| The cursor and the small dot show up once again, suggesting that we can place it at some other location also.

|-
| 08:57
| We do not want to place the dot at any other place.

|-
| 09:00
| Let us close it by clicking the right button of the mouse.

|-
| 09:05
| The right button does an '''undo''' operation.

|-
| 09:08
| In this case, dot selection has been removed.

|-
| 09:10
| Let us draw a line from this dot to the circle.

|-
| 09:15
| Let us select the '''Polyline'''.

|-
| 09:1
| Notice that the previous selections of '''Arrow Mode''' and '''Arrow Type''' have been remembered.

|-
| 09:24
| Within a session, Xfig remembers the parameter values.

|-
| 09:28
| Click at the dot.

|-
| 09:34
| Move the mouse to the bottom and click.

|-
| 09:41
| Now turn the mouse to the left, until at the bottom of the circle. Click.

|-
| 09:47
| Move the mouse to the circle and now click the '''middle mouse button'''.
|-
| 09:54
| Let us draw another line, to the left of the circle, by copying.
|-
| 10:08
| Let us now save this figure using the '''File''' button at the top left hand corner of Xfig and choosing '''Save'''.
|-
| 10:19
| Let us now '''Export''' the file.
|-
| 10:22
| Let us click the '''File''' button once again and choose '''Export'''.
|-
| 10:30
| Let us choose '''Language''' and then '''PDF'''.
|-
| 10:36
| We get the file "feedback.pdf".
|-
| 10:43
| Let us open this file through the command '''open feedback.pdf'''.
|-
| 10:56
| We now have the block diagram that we wanted.
|-
| 11:00
| We have completed our objective.
|-
| 11:04
| We have an assignment for you.
|-
| 11:08
| Substitute the blocks with different objects.
|-
| 11:13
| Try out operations such as '''rotate''' and '''flip'''.
|-
| 11:19
| View the file "feedback.fig" in an '''editor''' and identify different components.
|-
| 11:25
| Using the '''Library''', create entirely different block diagrams.
|-
| 11:32
| '''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.
|-
| 11:44
| More information on this mission is available at:'''http://spoken-tutorial.org/NMEICT-Intro'''

|-
| 11:53
| We welcome your participation and also your feedback.

|-
| 11:57
| This is Kannan Moudgalya, signing off. Thanks for joining. Goodbye.

|}

@@ Line 380: / Line 380: @@
 |-
-| 09:1
+| 09:18
 | Notice that the previous selections of '''Arrow Mode''' and '''Arrow Type''' have been remembered.

Xfig/C2/Feedback-control-diagram/English-timed - Revision history

Sandhya.np14 at 11:08, 30 January 2019

Nancyvarkey: Created page with "{| border=1 |'''Time''' |'''Narration''' |- |00:00 |Welcome to the '''spoken tutorial''' on '''feedback diagram creation''' using '''Xfig'''. |- |00:07 |In the spoken tutori..."