Inherits:
::tycho::Graphics
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Related constructs -
Source File -
Contents:
public methods
- protected methods
- protected variables
This class define a basic graphical editor for editing bubble and arc graph,
which can be used as a base class.
Public constructs
-
clear
- Clear the display, discarding the current graphics and corresponding
data structure.
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setReadOnly
bool
- Specify whether or not modifications are allowed in the displayed text.
Note that this is independent of whether the associated file is readonly.
It merely determines whether the buffer can be modified, not whether the
file can be modified. To control the file, use
toggleReadOnly
.
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deleteItem
item
- Invoked by the Cut command in the Edit menu.
This method deletes the specified item from the canvas
along with its corresponding entries in the data structures.
It invokes the "deleteNode" or "deleteArc" methods below
depending on whether the item is a node or an arc.
-
smoothToggleArc
item
- Toggle the mode of an arc between smooth (Bezier curve) or zigzag.
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addPoint
- Add a new point downstream (towards the arrow) to the doubly-selected
point. The new point will be the midpoint between the doubly-selected
point and its downstream neighbor.
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deletePoint
- Delete the doubly-selected point on an arc.
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getInfo
- Get information about the # of nodes/arcs.
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newNode
- Item creation commands.
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newArc
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bind_B1
x y
- Canvas-wide bindings.
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bind_B1_Motion
x y
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bind_BR1
x y
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bind_Motion
x y
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bind_node_B1
x y
- Select and un-select
When a node is selected, its outline becomes red. When it's
un-selected, its outline is black. Click mouse button 1 over
a node to select it. Click mouse button 1 in the empty area
to un-select the selected node, if there is any.
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bind_arc_B1
x y
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bind_selected_Enter
x y
- These methods are handlers for events on the "selected" tag.
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bind_selected_Leave
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bind_selected_B1_Motion
x y
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bind_selected_node_B1_Motion
x y
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bind_selected_BR1
x y
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bind_selectedpoint_B1
x y
- These methods are handlers for events on the "selectedpoint" tag.
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bind_selectedpoint_B1_Motion
x y
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bind_selarclabel_B1
x y
- These methods are handlers for events on the "selarclabel" tag.
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bind_selarclabel_B1_Motion
x y
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bind_selarclabel_BR1
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chooseCursor
x y
- Following are utility functions.
Protected constructs
-
deleteNode
node
- Delete the specified node and its incident edges from the canvas
along with the relevant entries in the data structures. This
method is only used by the "deleteItem" method.
-
deleteArc
arc
- Delete the specified arc from the canvas along with the
relevant entries in the data structures. This method is
only used by the "deleteItem" method.
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mkNode
x y
- Create new node at (x,y).
-
mkArc
x y
- Draw arc on canvas, used by bind_BR1.
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resizeNode
tag x1 y1 x2 y2
- Only used by bind_selected_node_B1_Motion.
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oval_slope
oval m xneg
- Only used by resizeNode.
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adjustArcLabel
arc
- Adjust the arc label when the arc has changed.
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chooseCursorOverArc
x y
-
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chooseCursorOverNode
x y
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find_close_node
x y
- return the close node within "gravity", if none, return
empty list.
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lineMidpoint
arc
- Return the (x,y) coordinates of the midpoint of a line.
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snap_to_oval
oval x y
- Snap point (x,y) to the oval. Return the snapped-to point
on the oval.
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unselect
-
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setUpCanvasBindings
- Establish bindings for the canvas.
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create_item
- This is needed for creating new node/arc.
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nodeInfo
- Array that stores info about the nodes/states.
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edgeInfo
- Array that stores info about the edges/transitions.
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dblselpt_index
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point_to_draw
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oldx
-
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oldy
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node_id
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node_create_state
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arc_coords
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arc_id
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drag_action
-
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button1_down
0
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over_selected
0
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Index of classes
Author: Wan-Teh Chang, Bilung Lee
Version: @(#)EditBubbleAndArc.itcl 1.11 10/29/96
Copyright: (c) 1995-1996 The Regents of the University of California.