ttk::combobox - text field with popdown selection list
ttk::combobox pathName ?options? -class -cursor -takefocus -style
[-exportselection exportSelection] Boolean value. If set, the widget selection is linked to the X selection. [-justify justify] Specifies how the text is aligned within the widget. One of left, center, or right. [-height height] Specifies the height of the pop-down listbox, in rows. [-postcommand postCommand] A Tcl script to evaluate immediately before displaying the listbox. The -postcommand script may specify the -values to display. [-state state] One of normal, readonly, or disabled. In the readonly state, the value may not be edited directly, and the user can only select one of the -values from the dropdown list. In the normal state, the text field is directly editable. In the disabled state, no interaction is possible. [-textvariable textVariable] Specifies the name of a variable whose value is linked to the widget value. Whenever the variable changes value the widget value is updated, and vice versa. [-values values] Specifies the list of values to display in the drop-down listbox. [-width width] Specifies an integer value indicating the desired width of the entry window, in average-size characters of the widget's font.
A combobox combines a text field with a pop-down list of values; the user may select the value of the text field from among the values in the list.
pathName cget option Returns the current value of the specified option. See widget(n). pathName configure ?option? ?value option value ...? Modify or query widget options. See widget(n). pathName current ?newIndex? If newIndex is supplied, sets the combobox value to the element at position newIndex in the list of -values. Otherwise, returns the index of the current value in the list of -values or -1 if the current value does not appear in the list. pathName get Returns the current value of the combobox. pathName identify x y Returns the name of the element at position x, y, or the empty string if the coordinates are outside the window. pathName instate statespec ?script? Test the widget state. See widget(n). pathName set value Sets the value of the combobox to value. pathName state ?stateSpec? Modify or query the widget state. See widget(n). The combobox widget also supports the following entry widget commands (see entry(n) for details): bbox delete icursor index insert selection xview
The combobox widget generates a <<ComboboxSelected>> virtual event when the user selects an element from the list of values. This event is generated after the listbox is unposted.
widget(n), entry(n)
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.