|
Size: 1359
Comment:
|
Size: 1355
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 10: | Line 10: |
| ||<rowstyle="background-color: #FFFFE0;"> mouse event ||key state || object hit ||object selected|| | ||<rowstyle="background-color: #FFFFE0;"> mouse event ||key state || object hit ||object selected|| |
How to make new tools
The best is to derive from existing tools, and redefine only what you don't like. The tools often function within a group of tools. They share a common way of using mouse buttons, and it is oke to push a tool unto the stack, and returning to the parent tool after stopping itself. Like tools based on a2dStTool use all as controller a2dStToolContr.
Changing State
A tool is used to manipulate what is in a drawing. User input combined with selected objects and mouse hit objects, brings a tool from one state into another. Down here some examples of what can bring a tool into a different state.
mouse event |
key state |
object hit |
object selected |
Ctrl Down |
true |
1 |
|
LeftDown + drag |
Ctrl Down |
true |
1 |
LeftDown + drag |
Shift Down |
true |
1 |
LeftDown + drag |
Alt Down |
true |
1 |
RightDown + drag |
Ctrl Down |
true |
1 |
Alt Down |
true |
1 |
Tool state
Zoom Tool
