Author: René Zaumseil <email@example.com> State: Draft Type: Project Vote: Done Created: 5-Jun-2018 Post-History: Keywords: Tk Tcl-Version: 8.7 Tk-Branch: tip-510 Vote-Summary: Rejected 1/3/1 Votes-For: DKF Votes-Against: KBK, JN, FV Votes-Present: BG Vote-Comments: code not yet ready, needs porting to macOS; alternate might be to just co-distribute, just as TDBC is with Tcl
This TIP intends to add the following commands to Tk:
rbc::graph, rbc::stripchart and rbc::barchart as graph
To get the original functionality a -style option will be added. This option can only be set on creation time.
rbc::vector as graph::vector
The vector is currently only used inside the graph widget. The namespace hidden version leaves room for a first class command with the same name.
rbc::winop snap as tk snap
Only the snap functionality is needed here. The busy command already exists as "tk busy" :)
tkp::canvas as path
The new path widget will contain the SVG like items and an additional window item to include other windows. Support functions will be placed in the ::path namespace.
New oo::class like widgets tko::frame, tko::labelframe and tko::toplevel
The new widgets will contain the same functionalite like the original tk widgets. They are oo:class's and it is possible to add,change and delte methods and options dynamically. The widgets could also be used as oo superclass's.
New tko::widget oo base class for widgets.
Rbc is available on sourceforge and github, but the development is stalled.
BLT, the orignal source, is at sourceforge. The author G. Howlett makes sporadic changes. Then there are large times without activity. It is not possible to estimate when a new version will be ready.
The intent of Tkpath was to substitute the Tk canvas. This leads to problems with advanced features (matrix transformations). Therefore the new path widget will only contain SVG like items. The only exception is the window item. This item is necessary to embed other widgets.
oo::class like widgets
Currently there is no megawidget support core package. These tip will go some steps in this direction. With widgets as oo::class's we can easyly extent existing widgets, just use it as a superclass. The provided cget/configure methods allow add, delete and changing of options. The implementation can be used in C and in Tcl.
The new widgets graph and path are also implemented as oo::class. This will make it easy to extent the functionality. As an example see the file
.../library/graph.tcl in which the method binding of the graph widget is implemented.
A patch implementing these changes is available in the fossil repository in the tip-510 branch.
Documentation is available in md-Format in the .../doc/ directory.
path.n.mdpath widget documentation
graph.n.mdgraph widget documentation
vector.n.mdgraph::vector command documentation
C-source interface files are in
.../generic/tko/. No functionality is currently exported.
C-source code files are in
.../generic/tko/. The new files are added to the makefiles. The calls to the initialization functions are added in tkWindow.c
tkoFrame.ctko::frame, tko::labelframe and tko::toplevel implementation
tkoGraph*.[ch]graph widget implementation
tkoVector*.[ch]graph::vector command implementation
tkoRbc*.[ch]Additional Rbc commands used in graph and graph::vector
tkoGraph*.[ch]path widget implementation
tkoWidget.ctko::widget base class implementation
Tcl-source code is in
.../library/. The new files are added into
Test files are available in the .../tests/tko/ directory.
tkoFrame.testtests from the tk frame.test file plus additional oo::class related tests
tkoGraph.testgraph widget tests
tkoGraph_vector.testgraph::vector command tests
tkoPath.testpath widget tests
See also discussion at the wiki.
A first voting was rejected, mostly because of the missing Mac implementation. See:
and with some analysis from Donal:
- Mac implementation of graph widget. May be borrow code from path
- Remove or change old code in
- Hardcoded usage of compiler and libraries in
unix/Makefile.in(search for "#RZ TODO").
- Add path files in Mac implementation. It works at least in Androwish.
- Which platforms should be used in path
- Provide demos
- Add more path tests
- Is it necessary to translate the documentation into man format?
- It is currently not possible to use unique abbreviations of class method names p.e. "graph .g; .g conf" A workaround would be to add all those method names. May be this can be solved in tcl::oo directly?
Any help especially with the Mac implementation would be great!
And could please look someone with
configure foo at the Makefile's
- Wait on new BLT.
- Develop widgets in extensions.
This document has been placed in the public domain.