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<!--l. 7--><div class="crosslinks"><p class="noindent">[<a
href="nipguidese2.html" >next</a>] [<a
href="#tailnipguidese1.html">tail</a>] [<a
href="nipguidech2.html#nipguidese1.html" >up</a>] </p></div>
<h3 class="sectionHead"><span class="titlemark">2.1 </span> <a
id="x7-60002.1"></a>Quick interface tour</h3>
<!--l. 8--><p class="noindent" ><a name="nip_label_sec:quicktour"></a>
<!--l. 10--><p class="indent" > Start up <span
class="phvr7t-x-x-80">nip2</span>. You should see something like Figure <a
href="nipguidech1.html#x5-40011">1.1<!--tex4ht:ref: fg:introwin --></a>
(the exact look might be different on your system).
<!--l. 13--><p class="indent" > The menus at the top of the window are very ordinary,
except for the <span
class="phvr7t-x-x-80">Toolkits </span>menu which contains all of the image
processing operations. The main part of the window shows
a workspace. Workspaces are split into tabs (across the top)
and each tab is made of a set of columns. The current
column, where new objects appear, has a dark green bar
across the top.
<!--l. 19--><p class="indent" > Click on <span
class="phvr7t-x-x-80">File </span>/ <span
class="phvr7t-x-x-80">Open </span>to get a file dialog and load up an
image. <span
class="phvr7t-x-x-80">nip2 </span>can load most image formats, try it and see.
Check the <span
class="phvr7t-x-x-80">Pin up </span>box to have the dialog remain after you
press OK. You can also drag files from the desktop or from
your file manager.
<!--l. 24--><p class="indent" > After you’ve loaded an image, <span
class="phvr7t-x-x-80">nip2 </span>should look like
Figure <a
href="#x7-60011">2.1<!--tex4ht:ref: fg:loadedimage --></a>. Double click on the thumbnail to open an image
view window. Alternatively, select <span
class="phvr7t-x-x-80">Edit </span>from the right-button
menu on the thumbnail. See Figure <a
href="#x7-60022">2.2<!--tex4ht:ref: fg:imageview --></a>.
<!--l. 29--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60011"></a>
<div class="center"
>
<!--l. 30--><p class="noindent" >
<!--l. 30--><p class="noindent" ><img
src="figs/snap2.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.1: </span><span
class="content">After loading an image</span></div><!--tex4ht:label?: x7-60011 -->
<!--l. 32--><p class="noindent" ><a name="nip_label_fg:loadedimage"></a>
<!--l. 33--><p class="indent" > </div><hr class="endfigure">
<!--l. 35--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60022"></a>
<div class="center"
>
<!--l. 36--><p class="noindent" >
<!--l. 36--><p class="noindent" ><img
src="figs/snap3.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.2: </span><span
class="content">Image view window</span></div><!--tex4ht:label?: x7-60022 -->
<!--l. 38--><p class="noindent" ><a name="nip_label_fg:imageview"></a>
<!--l. 39--><p class="indent" > </div><hr class="endfigure">
<!--l. 41--><p class="indent" > As well as the standard keymappings, <span
class="phvr7t-x-x-80">nip2 </span>has extra
shortcuts for navigating images, see Table <a
href="#x7-60031">2.1<!--tex4ht:ref: tb:shortcuts --></a>. Use the <span
class="phvr7t-x-x-80">View</span>
/ <span
class="phvr7t-x-x-80">Toolbar </span>menu to turn on other features. You can have a
status bar (shows image properties, mouse position and
pixel value), a display control bar (lets you change scale
and offset for display pixels, click on the arrow on
the left for a useful extra menu), a paint bar and some
rulers.
<!--l. 49--><p class="indent" > <a
id="x7-60031"></a><hr class="float"><div class="float"
>
<div class="center"
>
<!--l. 49--><p class="noindent" >
<div class="tabular"> <table id="TBL-1" class="tabular"
cellspacing="0" cellpadding="0" rules="groups"
><colgroup id="TBL-1-1g"><col
id="TBL-1-1"></colgroup><colgroup id="TBL-1-2g"><col
id="TBL-1-2"></colgroup><tr
class="hline"><td><hr></td><td><hr></td></tr><tr
style="vertical-align:baseline;" id="TBL-1-1-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-1-1"
class="td11">Keys in image display widget </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-1-2"
class="td11">Action </td>
</tr><tr
class="hline"><td><hr></td><td><hr></td></tr><tr
style="vertical-align:baseline;" id="TBL-1-2-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-2-1"
class="td11"><span
class="phvr7t-x-x-80">i</span>, <span
class="phvr7t-x-x-80">+ </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-1-2-2"
class="td11">Zoom in on mouse pointer </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-3-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-3-1"
class="td11"><span
class="phvr7t-x-x-80">o</span>, <span
class="phvr7t-x-x-80">- </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-1-3-2"
class="td11">Zoom out </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-4-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-4-1"
class="td11">Cursor up/down/left/right </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-4-2"
class="td11">Scroll a small amount in direction</td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-5-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-5-1"
class="td11">Shift and cursor up/down/left/right</td><td style="white-space:nowrap; text-align:left;" id="TBL-1-5-2"
class="td11">Scroll a screenful in direction </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-6-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-6-1"
class="td11">Ctrl and cursor up/down/left/right </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-6-2"
class="td11">Scroll to edge of image </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-7-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-7-1"
class="td11">Middle mouse drag </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-7-2"
class="td11">Pan image </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-8-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-8-1"
class="td11">Mouse wheel </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-8-2"
class="td11">Scroll up/down </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-9-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-9-1"
class="td11">Shift and mouse wheel </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-9-2"
class="td11">Scroll left/right </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-10-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-10-1"
class="td11">Ctrl and mouse wheel </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-10-2"
class="td11">Zoom in/out </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-11-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-11-1"
class="td11"><span
class="phvr7t-x-x-80">0 </span>(zero key) </td><td style="white-space:nowrap; text-align:left;" id="TBL-1-11-2"
class="td11">Zoom out to fit image to window </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-12-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-12-1"
class="td11"><span
class="phvr7t-x-x-80">1</span>, <span
class="phvr7t-x-x-80">2</span>, <span
class="phvr7t-x-x-80">4</span>, <span
class="phvr7t-x-x-80">8 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-1-12-2"
class="td11">Set magnification to 1, 2, 4 or 8 </td>
</tr><tr
style="vertical-align:baseline;" id="TBL-1-13-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-13-1"
class="td11">Ctrl and <span
class="phvr7t-x-x-80">2</span>, <span
class="phvr7t-x-x-80">4</span>, <span
class="phvr7t-x-x-80">8 </span></td><td style="white-space:nowrap; text-align:left;" id="TBL-1-13-2"
class="td11">Set zoom out factor to 2, 4 or 8 </td>
</tr><tr
class="hline"><td><hr></td><td><hr></td></tr><tr
style="vertical-align:baseline;" id="TBL-1-14-"><td style="white-space:nowrap; text-align:left;" id="TBL-1-14-1"
class="td11"> </td></tr></table></div></div>
<br /><div class="caption"
><span class="id">Table 2.1: </span><span
class="content"><span
class="phvr7t-x-x-80">nip2 </span>shortcuts for the image view window</span></div><!--tex4ht:label?: x7-60031 -->
<!--l. 71--><p class="noindent" ><a name="nip_label_tb:shortcuts"></a>
</div><hr class="endfloat" />
<!--l. 74--><p class="indent" > You can mark things on an image. Hold down Ctrl and
drag down and right with the left mouse button to mark a
region. Ctrl-left-click to mark a point. Drag up and left to
mark an arrow (two points connected by a line). Drag
from the rulers to mark guides. Right-click on a label
to get a menu which you can use to remove or edit
one of these things. Left drag on a label to move the
things around, left-drag on the edges or corners to resize.
Figure <a
href="#x7-60043">2.3<!--tex4ht:ref: fg:imageviewregion --></a> shows the same image with stuff marked on
it.
<!--l. 82--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60043"></a>
<div class="center"
>
<!--l. 83--><p class="noindent" >
<!--l. 83--><p class="noindent" ><img
src="figs/snap4.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.3: </span><span
class="content">Image view window with marked regions</span></div><!--tex4ht:label?: x7-60043 -->
<!--l. 85--><p class="noindent" ><a name="nip_label_fg:imageviewregion"></a>
<!--l. 86--><p class="indent" > </div><hr class="endfigure">
<!--l. 88--><p class="indent" > Clean up any messing about and leave two regions on
your image. The main window should now look something
like Figure <a
href="#x7-60054">2.4<!--tex4ht:ref: fg:main2regions --></a>.
<!--l. 91--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60054"></a>
<div class="center"
>
<!--l. 92--><p class="noindent" >
<!--l. 92--><p class="noindent" ><img
src="figs/snap5.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.4: </span><span
class="content">Main window, two regions marked</span></div><!--tex4ht:label?: x7-60054 -->
<!--l. 94--><p class="noindent" ><a name="nip_label_fg:main2regions"></a>
<!--l. 95--><p class="indent" > </div><hr class="endfigure">
<!--l. 97--><p class="indent" > There are three rows visible here, <span
class="phvr7t-x-x-80">A1</span>, <span
class="phvr7t-x-x-80">A4 </span>and <span
class="phvr7t-x-x-80">A7</span>. Each
row has (from left to right) a pair of up/down arrows (these
indicate that the row contains sub-rows: click on the down
arrow several times to open the row up and see inside),
the name button (left-click to select, Shift-left-click to
extend-select, Ctrl-left-click to toggle select, click on the
workspace background to unselect everything, left-drag on
the name button to reorder items within the column,
right-click to get a context menu) and the thumbnail
image.
<!--l. 106--><p class="indent" > Left-click on the name button of one of these images to
select it, and then click on <span
class="phvr7t-x-x-80">Toolkits </span>/ <span
class="phvr7t-x-x-80">Image </span>/ <span
class="phvr7t-x-x-80">Transform </span>/ <span
class="phvr7t-x-x-80">Rotate</span>
/ <span
class="phvr7t-x-x-80">Free </span>(alternatively, if nothing is selected when you click on
one of the toolkit menus, <span
class="phvr7t-x-x-80">nip2 </span>will apply the operation
to the bottom object in the current column). A new
row will appear representing the rotation operation.
Drag the slider to rotate the image (or type an angle in
degrees into the box to the left of the slider and press
Return). Pick an interpolation type from the option menu
and zoom in on some pixels to check the result. See
Figure <a
href="#x7-60065">2.5<!--tex4ht:ref: fg:rotate --></a>.
<!--l. 116--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60065"></a>
<div class="center"
>
<!--l. 117--><p class="noindent" >
<!--l. 117--><p class="noindent" ><img
src="figs/snap6.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.5: </span><span
class="content">Using <span
class="phvr7t-x-x-80">Rotate </span>/ <span
class="phvr7t-x-x-80">Free</span></span></div><!--tex4ht:label?: x7-60065 -->
<!--l. 119--><p class="noindent" ><a name="nip_label_fg:rotate"></a>
<!--l. 120--><p class="indent" > </div><hr class="endfigure">
<!--l. 122--><p class="indent" > The same thing works for image processing operations
that take two arguments. Left-click on one of your original
regions, Ctrl-left-click on the rotated image (the box at the
left of the main window status bar says what’s selected
and in what order), and click on <span
class="phvr7t-x-x-80">Toolkits </span>/ <span
class="phvr7t-x-x-80">Image </span>/ <span
class="phvr7t-x-x-80">Join </span>/
<span
class="phvr7t-x-x-80">Left to Right</span>. A new row appears representing the join
operation.
<!--l. 128--><p class="indent" > Click on <span
class="phvr7t-x-x-80">Background Colour</span>, type in 128 and press
Return. Drag the <span
class="phvr7t-x-x-80">shim </span>slider to 50 (or type 50 into the
box just to the left of the slider and press Return). See
Figure <a
href="#x7-60076">2.6<!--tex4ht:ref: fg:join --></a>.
<!--l. 132--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60076"></a>
<div class="center"
>
<!--l. 133--><p class="noindent" >
<!--l. 133--><p class="noindent" ><img
src="figs/snap7.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.6: </span><span
class="content">Using <span
class="phvr7t-x-x-80">Join </span>/ <span
class="phvr7t-x-x-80">Left to Right</span></span></div><!--tex4ht:label?: x7-60076 -->
<!--l. 135--><p class="noindent" ><a name="nip_label_fg:join"></a>
<!--l. 136--><p class="indent" > </div><hr class="endfigure">
<!--l. 138--><p class="indent" > The <span
class="phvr7t-x-x-80">Toolkits </span>menu is large and can be slow and annoying
to find things in, so <span
class="phvr7t-x-x-80">nip2 </span>has several shortcuts. First, you can
tear-off menus by clicking on the dotted line at the top. If
you’re going to be using one of the sub-menus repeatedly
this can save a lot of clicking. Next, you can set keyboard
shortcuts for menu items by moving the mouse pointer over
the item and pressing the key combination you want to
set.
<!--l. 145--><p class="indent" > Some systems won’t let you edit menu shortcuts by
default. For example, on GNOME, you need to enable this
in <span
class="phvr7t-x-x-80">System </span>/ <span
class="phvr7t-x-x-80">Preferences </span>/ <span
class="phvr7t-x-x-80">Menus & Toolbars</span>.
<!--l. 149--><p class="indent" > Finally, there is a toolkit browser: this shows the same set
of items, but in an easier-to-browse way. Click on <span
class="phvr7t-x-x-80">View </span>/
<span
class="phvr7t-x-x-80">Toolkit Browser </span>and the browse side-panel will appear, see
Figure <a
href="#x7-60087">2.7<!--tex4ht:ref: fg:browse --></a>. It shows all of the items as a single long
list. Type into the search box at the top to only show
items which match. Double-click (or press Return) on
an item to activate it. Scroll to the right to see what
arguments the item needs and what menu it appears
in.
<!--l. 156--><p class="indent" > <hr class="figure"><div class="figure"
>
<a
id="x7-60087"></a>
<div class="center"
>
<!--l. 157--><p class="noindent" >
<!--l. 157--><p class="noindent" ><img
src="figs/snap7a.jpg" alt="PIC"
></div>
<br /> <div class="caption"
><span class="id">Figure 2.7: </span><span
class="content">The toolkit browser</span></div><!--tex4ht:label?: x7-60087 -->
<!--l. 159--><p class="noindent" ><a name="nip_label_fg:browse"></a>
<!--l. 160--><p class="indent" > </div><hr class="endfigure">
<!--l. 162--><p class="indent" > The box at the bottom of each column is for entering
new expressions. You can type stuff here, and <span
class="phvr7t-x-x-80">nip2 </span>will
make a new row for each item you enter. Try typing <span
class="phvr7t-x-x-80">2 +</span>
<span
class="phvr7t-x-x-80">2 </span>and pressing Return. The syntax is (almost, with a
few small differences) the same as the C programming
language. See <span
class="cmsy-10">ยง</span><a
href="nipguidese27.html#x38-630006.6">6.6<!--tex4ht:ref: sec:operators --></a> for a list of the differences. Try
multiplying the joined images by a small amount (eg. type
something like <span
class="phvr7t-x-x-80">A9 * 1.2 </span>and press Return). Normally <span
class="phvr7t-x-x-80">nip2 </span>will
pick names for new objects for you (like <span
class="phvr7t-x-x-80">A1</span>), but you
can set a name yourself if you like. Try entering <span
class="phvr7t-x-x-80">fred =</span>
<span
class="phvr7t-x-x-80">12</span>.
<!--l. 172--><p class="indent" > Click the down button once on your brightened image
and left-click on the area just below the thumbnail. You
should see the stuff you typed to make that row. You
can edit it to be anything else, press Return and <span
class="phvr7t-x-x-80">nip2</span>
will recalculate. Try going back to your original image
(the one you loaded from a file), open an image view
window, and try dragging one of the regions. You can
change any of the sliders in the rotate or the join rows as
well.
<!--l. 179--><p class="indent" > Right-click on a thumbnail for a useful menu. Use <span
class="phvr7t-x-x-80">Save</span>
<span
class="phvr7t-x-x-80">As </span>to save an image to a file. Use <span
class="phvr7t-x-x-80">Replace From File </span>to change
the image in a row (and recalculate the rest of your
workspace, very handy). Use <span
class="phvr7t-x-x-80">Header </span>to view an image’s
metadata.
<!--l. 184--><p class="indent" > You can also edit the insides of objects. Click the down
button next to one of your regions until the <span
class="phvr7t-x-x-80">width </span>and
<span
class="phvr7t-x-x-80">height </span>rows appear, click on <span
class="phvr7t-x-x-80">width </span>and type <span
class="phvr7t-x-x-80">height * 2</span>.
Now open the image window the region is defined on
and try to resize it: you’ll find that the width of the
region is fixed, but that if you change the height, the
width changes with it. This is a very general property of
classes in <span
class="phvr7t-x-x-80">nip2</span>: you can use it to join objects together in
complex ways, and to modify the behaviour of interactive
objects.
<!--l. 192--><p class="indent" > Right click on a column title bar to get a useful menu.
Click on <span
class="phvr7t-x-x-80">File </span>/ <span
class="phvr7t-x-x-80">New </span>/ <span
class="phvr7t-x-x-80">Column </span>make another column (handy for
organising a workspace). If you drag from an image
thumbnail on to the workspace background, <span
class="phvr7t-x-x-80">nip2 </span>will make a
new column for you. You can drop thumbnails on to other
thumbnails to make links.
<!--l. 198--><p class="indent" > There’s a useful right-click menu on the tab name.
Duplicating tabs is a very easy way to try something out:
make a copy of your tab, try changing something, if it
doesn’t work out, just delete your new tab and go back to
where you were. You can drag tabs between workspaces,
and you can drag a tab to the desktop to make a new
workspace. You can make references between tabs with thetab name and a dot, for example <span
class="phvr7t-x-x-80">tab1.A1</span>. You can save
columns, tabs or workspaces to workspace files, then merge
them back into a colum, as part of a tab, or as a new
tab.
<!--l. 207--><p class="indent" > If <span
class="phvr7t-x-x-80">nip2 </span>falls over (I do hope it doesn’t), you can usually
get your work back by restarting <span
class="phvr7t-x-x-80">nip2 </span>and clicking on <span
class="phvr7t-x-x-80">File </span>/
<span
class="phvr7t-x-x-80">Search for Workspace Backups</span>. There are a lot of preferences
(perhaps too many), see Appendix <a
href="nipguideap1.html#x48-89000A">A<!--tex4ht:ref: sec:config --></a>.
<!--l. 212--><p class="indent" > There is a lot of stuff in the <span
class="phvr7t-x-x-80">Toolkits </span>menus, but they do
almost all have tooltips. If you let your mouse hover over a
menu item for a moment you should get some helpful text.
The toolkit menu is organised by object type. If you want to
do something to a matrix, look in the <span
class="phvr7t-x-x-80">Toolkits </span>/ <span
class="phvr7t-x-x-80">Matrix </span>menu.
The exception is <span
class="phvr7t-x-x-80">Toolkits </span>/ <span
class="phvr7t-x-x-80">Tasks </span>which repeats many of the
regular toolkit items, but groups them by typical tasks
instead.
<!--l. 220--><p class="indent" > Operations can work on groups as well as on single
images, so you can batch things up. If you save a group of
images, <span
class="phvr7t-x-x-80">nip2 </span>will number each image sequentially for you.
You can use <span
class="phvr7t-x-x-80">Edit </span>/ <span
class="phvr7t-x-x-80">Duplicate </span>to make copies of objects. If you
select lots of objects and duplicate them, <span
class="phvr7t-x-x-80">nip2 </span>will (fairly
intelligently) rename everything for you so it all still
works.
<!--l. 226--><div class="crosslinks"><p class="noindent">[<a
href="nipguidese2.html" >next</a>] [<a
href="nipguidese1.html" >front</a>] [<a
href="nipguidech2.html#nipguidese1.html" >up</a>] </p></div>
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