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