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XWN740

X-Windows Configuring and Using Using the X Server (Chapter 5: Pages 85 – 90 ). XWN740. Agenda. Using the X Server Interacting with the X Server Changing Screen Resolution: “On the Fly” Dynamically Middle Mouse Button Keyboard Focus Keyboard and Mouse Grabs. Using the X Server.

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XWN740

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  1. X-Windows Configuring and Using Using the X Server (Chapter 5: Pages 85 – 90 ) XWN740

  2. Agenda • Using the X Server • Interacting with the X Server • Changing Screen Resolution: • “On the Fly” • Dynamically • Middle Mouse Button • Keyboard Focus • Keyboard and Mouse Grabs

  3. Using the X Server Interacting with the X Server • Although the user will spend their most time working on client applications when the X Windows server is running, there are a few keystroke combinations that are useful while working in X such as: • Changing Resolution • Changing Focus • Copying and Pasting Text • Performing Mouse Grabs

  4. Using the X Server Changing Resolution • Usually when the X Windows server is configured, it has the ability to switch to various screen resolutions.For example: • 1280x1024 • 1024x768 • 800x600 • 640x480 • There are two methods of changing the screen resolution. One method does redraws the client windows for scaling, and the other method does not.

  5. Using the X Server Changing Resolution On the Fly • This method does not redraw the application windows when the screen resolution is changed. The user can use keystroke combinations to change resolutions in a sequence. • Keystroke combinations: • <CTRL><ALT><+> • Go forward in the list of resolutions • <CTRL><ALT><-> • Go backward in the list of resolutions

  6. Using the X Server Changing Resolution Dynamically • This method redraws the application windows when the screen resolution is changed. The user can use commands such as the command xrandr | more to help to change the resolutions dynamically. Using <CTRL><ALT><BKSP> Using xrandr -s 800x600

  7. Using the X Server Copying and Pasting Text • The X Windows server is designed to work best with mice that have 3 buttons (left, middle, right). The use can use <CTRL><c> and <CTRL><v> to copy and paste text, but there is another method in X Windows: • Copy Text – Click and drag on text • Click middle mouse button – paste text • If the mouse only has two buttons, you can similate the middle button by clicking on both the left and right buttons at the same time.

  8. Starting X Windows Mouse Grabs • The mouse can be used to “grab” not only text, but entiresessions of a terminal (like xterm). To prevent this security risk (eg. pasting important commands and stdout to another terminal), the terminal can be secured to prevent this from happening • Hold <CTRL> and left Mouse button in terminal window • Select from context menu Secure Keyboard

  9. Using the X Server Clipboard Applications • The disadvantage of using mouse grabs is that previous text selections can be lost (overwritten). • One way to solve this problem is to run clipboard applications such as xclipboard, klipper, or glipper to store multiple selections to be used for future pasting operations....

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