Changeset 2488


Ignore:
Timestamp:
03/20/07 13:42:18 (13 years ago)
Author:
sorber
Message:

Overlays help update: polyline tool.

File:
1 edited

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  • trunk/loci/visbio/help/overlays.html

    r2101 r2488  
    3737To draw an overlay, choose the appropriate tool from the "Tools" section of the 
    3838overlay controls. The tools shown above (from left to right) are: pointer, 
    39 line, freeform, marker, text, oval, box and arrow. In many ways, they behave like 
    40 similar tools available in many image editing programs. 
     39line, freeform, marker, text, oval, box, arrow, and polyline. In many ways, 
     40  they behave like similar tools available in many image editing programs. 
    4141 
    4242<ul> 
     
    5050    drag across the display to draw a new line.</li> 
    5151  <li>The <b>freeform tool</b> draws freeform curves Click and 
    52     drag across the display to draw a new line.  The freeform tool has several built-in editing features: 
    53     <ul> 
    54       <li>To <b>erase</b> a portion of a freeform, Ctrl+drag backwards along the freeform from one end.</li> 
    55     <li>To <b>split</b> a freeform in two, Ctrl+click on a point along the curve.</li> 
    56       <li>To <b>resume</b> drawing an existing freeform, click near the end of an existing freeform and drag.</li> 
    57       <li>To <b>splice</b> two freeform curves together end-to-end, simply drag near the end of an existing freeform while drawing.  A freeform in the process of being drawn will automatically connect to a nearby end of an existing freeform. When drawing freeforms close together, hold the shift key to suppress automatic reconnection.</li> 
    58       <li>To <b>redraw</b> a portion of a freeform curve, click on the curve and drag the mouse.  Dragging produces a tendril-like extension of the curve.  When the tendril approaches the original curve, it automatically reconnects, replacing the subtended segment of the original curve.  To prevent the tendril from reconnecting to the original curve, hold Shift.  Release Shift to allow the tendril to reconnect to the curve.  If the mouse is released before the tendril reconnects, the original curve is restored.</li> 
    59     </ul> 
     52    drag across the display to draw a new line.  <p>The freeform tool has several built-in editing features: 
     53  <ul> 
     54    <li>To <b>erase</b> a portion of a freeform, Ctrl+drag backwards along the 
     55      freeform from one end.</li> 
     56    <li>To <b>split</b> a freeform in two, Ctrl+click on a point along the 
     57      curve.</li> 
     58    <li>To <b>resume</b> drawing an existing freeform, click near the end of an 
     59      existing freeform and drag.</li> 
     60    <li>To <b>splice</b> two freeform curves together end-to-end, simply drag 
     61      near the end of an existing freeform while drawing.  A freeform in the 
     62      process of being drawn will automatically connect to a nearby end of an 
     63      existing freeform. When drawing freeforms close together, hold the shift 
     64      key to suppress automatic reconnection.</li> 
     65    <li>To <b>redraw</b> a portion of a freeform curve, click on the 
     66      curve and drag the mouse.  Dragging produces a tendril-like extension of 
     67      the curve.  When the tendril approaches the original curve, it 
     68      automatically reconnects, replacing the subtended segment of the original 
     69      curve.  To prevent the tendril from reconnecting to the original curve, 
     70      hold Shift.  Release Shift to allow the tendril to reconnect to 
     71      the curve.  If the mouse is released before the tendril reconnects, the 
     72      original curve is restored.</li>  
     73    </ul>  
    6074  <li>The <b>marker tool</b> draws markers at a given point. Click a point in 
    6175    the display to place a crosshairs there.</li> 
     
    7185    arrow's tip corresponding to the point at which you press the mouse 
    7286    button.</li> 
     87  <li>The <b>polyline tool</b> draws a segmented curve, point-to-point.  Click 
     88    on the display to begin a new polyline.  Move the mouse and click to add 
     89    new nodes to the line.  To complete a polyline, either double-click on the 
     90    display or return to the last node on the curve and click when a yellow 
     91    circle appears around it.  Similarly, a green circle will appear 
     92    around the first node on a polyline being drawn if the mouse is moved 
     93    directly over it.  Click while the green circle is visible to "close" 
     94    the polyline, placing the final node directly over the first. 
     95     
     96    <p>Like the freeform tool, the polyline tool has several built-in editing 
     97    features: 
     98    
     99    <ul> 
     100      <li>To <b>reposition</b> a node of a completed polyline, move the mouse 
     101      over the node until a yellow circle appears.  With the yellow circle 
     102      visible, click and drag the node to the desired postion, then release the 
     103      mouse.</li> 
     104 
     105      <li>To <b>delete</b> a node of an existing polyline, position the mouse 
     106      over a node until a yellow circle appears around it.  Then Ctrl+click to 
     107      delete the node.  The polyline splits in two around the deleted node; 
     108      however, any one-node polylines created as a result are automatically 
     109      deleted.</li> 
     110 
     111      <li>To <b>resume</b> drawing an existing polyline, move the mouse over an 
     112      end node so that a yellow circle appears.  Then click to resume drawing 
     113      the line at that end.</li> 
     114     </ul> 
     115  </li> 
     116 
    73117</ul> 
    74118 
     
    83127dimensional position. 
    84128 
    85 <p>To remove an overlay, press click the "Remove" button or press the Delete 
    86 key. 
     129<p>To remove an overlay, press click the "Remove" button or press the Delete key.   
    87130 
    88131<p>To copy overlays to the clipboard, first select them, then click the "Copy" 
     
    163206will clear out any current overlays, overwriting them with those saved in the 
    164207text file. 
     208 
     209<p>You can export your overlays to .xls spreadsheet format using the "Export Overlays..." button.  VisBio uses the Apache POI HSSF library to write .xls  
     210spreadsheets. 
    165211 
    166212<br><h3>See also:</h3> 
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