| ||||||||||||||||||||||||||
Tcl/Tk module T219
Drawing on Canvases
Exercises, examples and other material relating to training module T219. This topic is presented on public courses Learning to program in Tcl, Tcl/Tk, Tcl Programming
Tcl/Tk GUIs consist largely of components such as buttons, labels entry boxes and sliders. Sometimes you'll need something that's much more graphic and for this you'll use a canvas widget. You can write to a canvas down to individual pixel level, and you can also draw lines, ovals, rectangles, text and polygons. This module studies the options for drawing to and manipulating a canvas, and introduces computer graphic techniques such as world to pixel co-ordinate transformations and display list manipulation.
Examples from our training material
Pictures Using a Tcl/Tk canvas
Background information
Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from [here].
Topics covered in this module
Canvas basics.
Canvas and Canvas objects. Interacting with drawing objects. Canvas objects. The rectangle (rect) object. The oval object. The polygon object. The arc object. The line object. The text object. Computer graphics - techniques. Coordinate systems. Clipping. Display lists. Hidden line and surface. Further issues. Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page. Well House Consultants specialise in training courses in Tcl/Tk, Expect,Ruby, Lua, Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses at our training centre in Melksham, Wiltshire, England. It's surprisingly cost effective to come on our public courses - even if you live in a different country or continent to us. We have a technical library of over 700 books on the subjects on which we teach. These books are available for reference at our training centre. | ||||||||||||||||||||||||||
PH: 01144 1225 708225 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho PAGE: http://www.wellho.net/resources/T219.html • PAGE BUILT: Sun Oct 11 14:50:09 2020 • BUILD SYSTEM: JelliaJamb |