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55 | <H2><A NAME="SECTION0018140000000000000000"></A><A NAME="tkinter-basic-mapping"></A> | |
56 | <BR> | |
57 | 16.1.4 Mapping Basic Tk into Tkinter | |
58 | ||
59 | </H2> | |
60 | ||
61 | <P> | |
62 | Class commands in Tk correspond to class constructors in Tkinter. | |
63 | ||
64 | <P> | |
65 | <div class="verbatim"><pre> | |
66 | button .fred =====> fred = Button() | |
67 | </pre></div> | |
68 | ||
69 | <P> | |
70 | The master of an object is implicit in the new name given to it at | |
71 | creation time. In Tkinter, masters are specified explicitly. | |
72 | ||
73 | <P> | |
74 | <div class="verbatim"><pre> | |
75 | button .panel.fred =====> fred = Button(panel) | |
76 | </pre></div> | |
77 | ||
78 | <P> | |
79 | The configuration options in Tk are given in lists of hyphened tags | |
80 | followed by values. In Tkinter, options are specified as | |
81 | keyword-arguments in the instance constructor, and keyword-args for | |
82 | configure calls or as instance indices, in dictionary style, for | |
83 | established instances. See section <A href="tkinter-setting-options.html#tkinter-setting-options">16.1.6</A> on | |
84 | setting options. | |
85 | ||
86 | <P> | |
87 | <div class="verbatim"><pre> | |
88 | button .fred -fg red =====> fred = Button(panel, fg = "red") | |
89 | .fred configure -fg red =====> fred["fg"] = red | |
90 | OR ==> fred.config(fg = "red") | |
91 | </pre></div> | |
92 | ||
93 | <P> | |
94 | In Tk, to perform an action on a widget, use the widget name as a | |
95 | command, and follow it with an action name, possibly with arguments | |
96 | (options). In Tkinter, you call methods on the class instance to | |
97 | invoke actions on the widget. The actions (methods) that a given | |
98 | widget can perform are listed in the Tkinter.py module. | |
99 | ||
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101 | <div class="verbatim"><pre> | |
102 | .fred invoke =====> fred.invoke() | |
103 | </pre></div> | |
104 | ||
105 | <P> | |
106 | To give a widget to the packer (geometry manager), you call pack with | |
107 | optional arguments. In Tkinter, the Pack class holds all this | |
108 | functionality, and the various forms of the pack command are | |
109 | implemented as methods. All widgets in <tt class="module"><a href="module-Tkinter.html">Tkinter</a></tt> are | |
110 | subclassed from the Packer, and so inherit all the packing | |
111 | methods. See the <tt class="module"><a href="module-Tix.html">Tix</a></tt> module documentation for additional | |
112 | information on the Form geometry manager. | |
113 | ||
114 | <P> | |
115 | <div class="verbatim"><pre> | |
116 | pack .fred -side left =====> fred.pack(side = "left") | |
117 | </pre></div> | |
118 | ||
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