| 19-1. | Client/Server Architecture. Describe the roles of a windows (or windowing) server and a windows client. |
| 19-2. | Object-Oriented Programming. Describe the relationship between child and parent windows. |
| 19-3. | Label Widgets. Update the tkhello1.py script to display your own message instead of "Hello World!" |
| 19-4. | Label and Button Widgets. Update the tkhello3.py script so that there are three new buttons in addition to the QUIT button. Pressing any of the three buttons will result in changing the text label so that it will then contain the text of the Button (widget) that was pressed. |
| 19-5. | Label, Button, and Radiobutton Widgets. Modify your solution to the previous problem so that there are three Radiobuttons presenting the choices of text for the Label. There are two buttons: the QUIT button and an "Update" button. When the Update button is pressed, the text label will then be changed to contain the text of the selected Radiobutton. If no Radiobutton has been checked, the Label will remain unchanged. |
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| 19-6. | Label, Button, and EnTRy Widgets. Modify your solution to the previous problem so that the three Radiobuttons are replaced by a single Entry text field widget with a default value of "Hello World!" (to reflect the initial string in the Label). The Entry field can be edited by the user with a new text string for the Label which will be updated if the Update button is pressed. |
| 19-7. | Label and EnTRy Widgets and Python I/O. Create a GUI application that provides an Entry field where the user can provide the name of a text file. Open the file and read it, displaying its contents in a Label. Extra Credit (Menus): Replace the Entry widget with a menu that has a File Open option that pops up a window to allow the user to specify the file to read. Also add an Exit or Quit option to the menu rather than having a QUIT button. |
| 19-8. | Simple Text Editor. Use your solution to the previous problem to create a simple text editor. A file can be created from scratch or read and displayed into a Text widget that can be edited by the user. When the user quits the application (either with the QUIT button or the Quit/Exit menu option), the user is prompted whether to save the changes. Extra Credit: Interface your script to a spellchecker and add a button or menu option to spellcheck the file. The words that are misspelled should be highlighted by using a different foreground or background color in the Text widget. |
| 19-9. | Multithreaded Chat Applications. The chat programs from Chapters 13, 16, and 17 need completion. Create a fully-functional multithreaded chat server. A GUI is not really necessary for the server unless you want to create one as a front-end to its configuration, i.e., port number, name, connection to a name server, etc. Create a multithreaded chat client that has separate threads to monitor user input (and sends the message to the server for broadcast) and another thread to accept incoming messages to display to the user. The client front-end GUI should have two portions of the chat window: a larger section with multiple lines to hold all the dialog, and a smaller text entry field to accept input from the user. |
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| 19-10. | Using Other GUIs. The example GUI applications using the various toolkits in Chapter 18.4 are very similar; however, they are not the same. Although it is impossible to make them all look exactly alike, tweak them so that they are more consistent than they are now. |
| 19-11. | Using GUI builders. Download either Boa Constructor (for wxWidgets) or Glade (for GTK+) [or both!], and implement the "animal" GUI by just dragging and dropping the widgets from the corresponding palette. Hook up your new GUIs with callbacks so that they behave just like the sample applications we looked at in that chapter. |
