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-
- Manager 1.0 - a public screen manager for Release 2.04
-
- by Chris Papademetrious, REM-CTP Software
-
-
- I. What is Manager?
-
- Public screens are a new feature of Release 2.04. What are they? Public
- screens are nothing more than that - screens that are publicly accessable,
- and thus can be shared by different programs. For example, with public
- screens, you can put a desktop publishing program, a Shell window, and
- a menu utility on the same screen.
-
- Since public screens are unique to Release 2.04 (and higher), they
- require programs to specifically support public screens. There are some ways
- around this, as we shall see later, however.
-
-
- II. How do I run Manager?
-
- Manager is easy to run. Just double-click on its icon, or type "run Manager"
- in a Shell window (assuming Manager is in the current directory, or in your
- search path). Manager will bring up its window, ready for use.
-
-
- III. Manager's main window - what is it?
-
- "Open Screen" will bring up the screen definition window, which lets you
- define the type of screen you wish to open. Note that even when the screen
- definition window is open, the main window is still available for use;
- the "Open Screen" gadget is ghosted, however, so that you cannot select it
- once more by accident; only one screen definition window may be open at a
- time.
-
- "Close Screen" will close the screen that you have selected in the public
- screen list at the top of the window. If there is no selected screen, no
- action will be taken. If the screen cannot be closed for some reason, the
- display will flash indicating an error. A public screen can only be closed
- if there are no 'locks' on it, and no windows are opened on it (this
- includes Manager itself!)
-
- "Jump To Screen" will move Manager to the currently selected screen. If
- Manager can not jump to the new screen, it will try to reopen on the
- default screen. If this fails as well, it will exit with an error.
-
- "Make Default" will designate the currently selected screen as the new
- default screen. As a result, any program requesting the default public
- screen (such as Manager) will be pointed to this screen. The current
- default screen is shown at the bottom of Manager's window.
-
- The "Shanghai" checkbox, when checked, will cause windows requesting the
- Workbench screen to receive the default screen instead. Note that this does
- not work with every Workbench window, such as those of Workbench itself,
- but it should work with most programs that open their window on Workbench.
-
- The "PopPubScreen" checkbox stands for Pop Public Screen. When checked,
- it will cause a public screen to pop to the front of the display any time
- a window is opened on it.
-
-
- IV. Manager's screen definition window - what is it?
-
- This window is where you define a screen to be opened. You can give it
- a name, size, display mode, and much more. The options are listed below,
- along with a short description of what they control.
-
- "Screen Name" designates the name of the screen to be opened. It must be
- unique from other public screens already opened. If a duplicate name is
- entered, you will be informed, and given the opportunity to change it.
-
- "Width" and "Height" specify the width and height, in pixels, of the screen
- to be opened. To the right of the numeric gadgets there are cycle gadgets.
- These cycle gadgets control the size of the display that the screen
- can cover. In other words, the cycle gadgets control the degree of overscan
- that the screen may use, not the size of the screen itself. When the cycle
- gadgets are selected, however, suggested size values are placed into the
- numeric Width and Height gadgets automatically.
-
- "Colors" specifies the number of colors desired for the screen to be opened.
- More colors use up more memory, of course.
-
- "Font" specifies the font to be used for the screen and window titles. You
- may select another font by clicking on the "Choose Font" gadget directly
- beneath it.
-
- "Autoscroll" will allow you to scroll around on the screen by pushing the
- pointer against the edge of the screen. This only works when a window is
- active on a screen which does not fit entirely on the display. Try opening
- a large screen (say, 1000 by 1000) to see an example of this.
-
- "Open" tells Manager to attempt to open the screen with the selected
- characteristics. If the screen cannot be opened, you will be asked whether
- you want to cancel, or modify the settings to try again. The "Cancel"
- button will abort the current screen definition.
-
- On the right side of the window, a list of display modes resides. This
- list should contain the display modes that are currently installed in the
- system via the Monitor drawer on Workbench. If you want a display mode that
- is not listed, be sure to check if the monitor is being installed properly.
- See your Amiga Release 2.0 manual for more details.
-
-
- TECHNICAL NOTE [programmers only]: To implement the font selection,
- I store a pointer to the screen's TextAttr structure in the screen
- structure's UserData field. Any public screen clients must NOT alter
- this field, or the system will crash when the screen is closed!
- The font name in the TextAttr is allocated via AllocVec(), as is
- the TextAttr() itself.
-
- V. Wow! What should I do now?
-
- If you have any questions or comments regarding Manager, they can be
- GEmailed to me on GEnie, or sent via US Mail. Donations are quite welcome.
-
-
- GEnie: CHRIS.P [-=Chrispy=-]
-
- US Mail: Chris Papademetrious
- 306 Summit Drive
- Ephrata, PA 17522
-
- Enjoy!
-
-