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The following diagram edit commands are issued by using the mouse
and/or the keyboard in the drawing area. We have grouped them into
creation commands, selection commands, text edit commands and movement
commands.
CREATION COMMANDS.
==================
Create a node.
--------------
For creating a node, first choose the desired node type from the node
tiles. Click button-1 in the background of the drawing area, at the
desired position. A new node shape appears, having its center at the
position where is clicked and having the shape as indicated by the
selected node type in the tiles.
Create an edge.
---------------
To create a straight edge between two nodes, Drag with button-2 from
a node to a node. This means you push and hold down button-2 somewhere
inside the source node and move the mouse with button-2 still pushed
down.
To create a segmented edge, release button-2 in the background while
you are dragging. Then the first intermediate point is created. After
that, the line follows the mouse all by itself. Then you can add
another intermediate point by clicking button-2 somewhere else in the
background. You complete the edge by moving into the target node and
clicking button-2.
To create a curved edge, set the Curve toggle in the tiled menu. The
Bezier curve requires exactly two intermediate points, which makes four
edge points in total. These intermediate points are added in the same
way as creating normal multiple line segments as described for
segmented edges. When the four points are determined, a smooth curve is
drawn between the end points and the two intermediate points act as
controlling points.
SELECTION COMMANDS.
==================
Select a single node or edge.
-----------------------------
Click button-1 on an unselected shape (node, edge). The selection will
contain only this shape which will show black selection handles.
Select a part of the diagram.
-----------------------------
Drag button-1 starting in the background. The area that you are
selecting, is enclosed by a stippled box, and its bottom-right corner
is attached to the mouse. If you release button-1 then every shape
that was (partly) inside the stippled box is selected and every other
shape outside the box is unselected. One of these selected shapes will
show black selection handles, the others will become grey.
Add a shape to the selection.
-----------------------------
Click button-2 on an unselected shape. The first selected shape will
show black selection handles, the other selected shapes will show grey
selection handles.
Remove from the selection.
--------------------------
Click button-2 on a selected shape. The selection handles disappear.
Empty the selection.
--------------------
Click button-2 somewhere in the background. All selection handles
disappear.
Make selected shape first selected.
------------------------------------
You can enforce that a selected shape is the first selected by clicking
button-1 on an already selected (grey) shape. The selection handles of
the old first selected shape will become grey and the handles
of the clicked shape will become black.
TEXT EDIT COMMANDS.
==================
Go into edit mode.
------------------
For getting into edit mode make sure that the shape with the label that
you want to edit is the only selected shape. When you move the mouse
pointer into the single selected shape, the mouse pointer turns
into I-shape. By clicking button-1 on the shape or typing the first
character you go into edit mode.
There are two edit modes: in-line editing and out-line editing. In-line
editing takes place directly in the drawing area. Out-line editing
takes place in a separate window with a text editor that is popped up
when the edit mode is entered. You can indicate which of the two
possible edit modes has to be used by a toggle button labeled in-line
editor.
Edit text.
----------
In both in-line as the out-line editor you can type in any printable
character as text and move the edit cursor around with the arrow
buttons or by clicking with button-1 at the desired cursor position.
See the user manual for the more advanced text edit features.
Leave edit mode.
-----------------
From the in-line editor you leave edit mode by clicking button-1
outside the shape that is being edited or by clicking button-2
at any position of the drawing area. The text that is edited will
be updated, and when the autoresizing toggle is on, the shape will be
resized to make it fit the text that it contains. After the text is
updated, you can still undo the update including the autoresizing,
by issuing the undo command from the Edit menu.
MOVEMENT COMMANDS.
==================
Move one or more nodes.
-----------------------
You can move a node shape by positioning the mouse into that node and
then drag it with button-1. The shape does not need to be selected. A
grey node outline moves along with the mouse. If you release button-1
then this node shape is redrawn at the new position and all its
adjacent lines are redrawn too. You can also move the entire selection.
If you drag one of the selected node shapes, all other selected shapes
are moved with over the same distance, including the line handles of
the selected edges.
Moving an edge handle.
----------------------
You can drag the individual handles of an edge. When an edge is
selected and the mouse is in one of the handles, you can drag this
handle with button-1 and a grey outline of the new line follows
the mouse. You can move the intermediate handles of a line to an
arbitrary place in the drawing area. When you drag and release one of
the end point handles into the connected node or somewhere in the
background, then the end point will be placed at the border of the
connected node at a position that is the closest to the place where
the handle was released.
Redirect an edge.
-----------------
When you drag an end point handle of an edge into a different node
then the edge will be redirected to that node. The result is that the
edge now connects to a different node.
Add an edge handle.
-------------------
You add an extra handle when you drag with button-1 from a segment
of an existing line. Where you release the button a new edge
handle is added to the line.
Remove an edge handle.
----------------------
You remove an intermediate handle when you click with button-2 on
a handle of a single-selected line.
Move the label of an edge.
--------------------------
You can move the label of an edge by dragging it with button-1. The
edge need not be selected. You cannot move the label of a node; when
you move or resize a node, the label positions inside the node are
recalculated, as well as the labels of the adjacent edges.
Resize a node (from the center).
--------------------------------
Resizing a node shape is possible by dragging button-1 on one of the
selection handles. The mouse pointer turns into one of the eight
symbols that indicate to what direction the node shape can be resized.
With this operation the center of the node shape stays the same.
Resize a node (relocate its borders).
------------------------------------
Resizing a node shape is possible by dragging button-2 on one of the
selection handles. The mouse pointer turns into one of the eight
symbols that indicate to what direction the node shape can be resized.
With this operation the borders of node shape are moved.
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