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- Small Screen 1.3 — December 4, 1996
-
-
- ••• What does it do? •••
-
- On a sufficiently large screen, Small Screen shows the boundaries of one or
- more smaller screens. It is useful for testing whether something would fit
- on a small screen. Each screen boundary is represented by a transparent
- window with rounded corners, drawn in one of eight colors. Optionally, a
- hard disk and a trash can icon are drawn at the appropriate positions (i.e.
- where the real icons would appear on a freshly installed System 7). Under
- System 7.1 or later, the boundaries can be made to float on top of other
- windows even while the program runs in the background (the icons will not
- float, in order to mimic real icons that stick on the desktop).
-
- Small Screen is not an extension but an ordinary application. It does no
- operating system tricks, it just shows its (special) windows. Since it
- occupies only a small memory partition (45 K), it can usually be left running
- all the time. Of course, this makes sense only under MultiFinder or System 7.
-
- Small Screen is not the only tool for testing the effect of smaller screens.
- Multisync monitors allow to simply *switch* to a smaller screen, while
- tools like MiniScreen by Morgan Davis interact with the operating system to
- *simulate* a smaller screen. In both cases, switching screen sizes tends to
- mess up the desktop and can even require restarting the computer. In
- contrast, Small Screen just *shows the boundary* of a smaller screen, or
- even several boundaries at once, while the full screen remains available.
- This is sufficient for many purposes, and much more comfortable — just
- make it a startup application and forget it, it will be ready whenever you
- need it.
-
-
- ••• Selecting screens •••
-
- Nine screens of different size are available in the Screen menu. These sizes
- cover most monitors commonly used. The Screen menu also allows to
- specify whether a hard disk and a trash can icon should be shown with each
- screen, whether the screens boundaries should float on top of other
- windows, and to select one of eight colors for drawing the screens.
-
- If you need other screen sizes, you can modify the Screen menu using a tool
- like ResEdit. These are the rules:
- • In MENU #131, from item 5 onward, you can modify, add or remove size
- items as you wish. Those items that carry a check mark define the screens
- the program shows by default (i.e. when it finds no preferences file).
- • For each enabled screen item in MENU #131, there must be a WIND
- resource that describes the corresponding screen (item 5 corresponds to
- WIND resource #5 etc.). The screen boundary is taken from the window
- rectangle defined in the WIND resource, its other values are irrelevant.
-
- If you have customized version 1.0 of Small Screen and want to carry your
- changes over to this version, you should note the slight changes I made:
- Starting from version 1.1, the window rectangle no longer has to exceed the
- screen boundary by one pixel, and the defaults are now defined in the MENU
- rather than in the WIND.
-
- Please don't redistribute modified versions of Small Screen.
-
-
- ••• Small Screen Thinks For You •••
-
- Apart from responding to user interaction, the program does some
- processing on its own, namely for two reasons:
- • A screen saver usually wants to own the whole screen and doesn't like any
- windows floating on top of it. Therefore, Small Screen hides all its screen
- boundaries whenever it recognizes a screen saver. This only works for
- screen savers that register themselves using the "Gestalt" mechanism like
- After Dark (by Berkeley Systems) does. It would make sense to behave
- similarly when a game wants to own the whole screen, but since I see no
- safe way to recognize such a game the program doesn't try to.
- • Whenever you switch to a different monitor resolution on a multisync
- monitor, the system possibly moves some of the windows to make them
- fit into the new desktop boundary. This is of course against Small Screen's
- purpose, therefore the program watches its windows for any unexpected
- moves and undoes these.
-
-
- ••• Help, There's the WDEF Virus! •••
-
- Small Screen contains a WDEF resource #128. This is an essential part of
- the program: It is the "Window Definition Function" that defines the trans-
- parent windows with rounded corners. It should not be confounded with the
- WDEF virus, a quite popular Macintosh virus that also lives in a WDEF re-
- source. If you are anxious, use a virus checker to check your copy of Small
- Screen. Disinfectant 1.5 or later recognizes the two known strains of the
- WDEF virus.
-
-
- ••• Problems •••
-
- Small Screen has been tested on various Macs with various monitors
- attached. The program is very simple and does nothing suspicious, except
- for a careful patch to ExitToShell to ensure cleanup even when it is
- terminated anormally (floating windows seem to require this). Therefore I
- am pretty confident that it would run on any Mac and under any System
- version. It won't generate a settings file if HFS is not available, but this
- affects only very ancient Macs.
-
- There is one problem for which I don't feel responsible. It is only relevant to
- users of System 6 and affects not only Small Screen, but any program that
- runs in a small partition under MultiFinder: Be careful not to activate Small
- Screen while transferring a large clipboard — the clipboard contents gets
- lost if it doesn't fit in Small Screen's partition. This problem seems to be
- solved in System 7 and later.
-
-
- ••• Version History •••
-
- Version 1.0 (October 24, 1990)
- • First release.
-
- Version 1.1 (September 22, 1992)
- • Added the capability to draw hard disk and trash can icons.
- • Corrected a System 7 incompatibility: Version 1.0 causes an error type 1
- when Finder’s Hide and Show commands are used. (For all you techies:
- Never ignore update events, even if there is nothing to update! BeginUpdate
- and EndUpdate must be called just to reset the event.) Thanks to Jeffrey T.
- Krauss <jtkrauss@phoenix.Princeton.EDU> for reporting this error.
- • Corrected another System 7 incompatibility: Version 1.0 doesn't notice
- when the cursor shape changes behind its back, e.g. when an alias to the
- program is double-clicked while the program is running.
- • Reduced memory usage and reduced partition size to 30 K.
- • Reduced CPU usage by using the more efficient event handling mechanism
- introduced with MultiFinder (WaitNextEvent), if available.
- • Added Help Balloons.
- • Cosmetic enhancements here and there.
-
- Version 1.2 (February 11, 1993)
- • Added the capability to draw in one of eight colors.
-
- Version 1.3 (December 4, 1996)
- • Merged the "Show Disk Icon" and "Show Trash Icon" items in the Screen
- menu into a single "Show Icons" item.
- • Corrected a System 7.5 incompatibility: In Version 1.2, the help balloons
- for the menu titles didn't appear. (In technical terms: Menu bar balloons
- refuse to appear whenever the cursor is inside the portRect of the
- frontmost window.)
- • Corrected a System 6 incompatibility: In Version 1.2, MultiFinder refused
- to switch to other applications whenever "Show Disk Icon" was checked
- and "Show Trash Icon" was not checked. (In technical terms: Switching is
- disabled whenever the frontmost window has variation code 1.)
- • The program now saves the settings in a preferences file. (Finally!)
- • Added the capability to make the screen boundaries float on top of other
- windows. Thanks to Matt Slott <fprefect@umich.edu> for his "appe
- windows" library which inspired me and helped avoid unnecessary errors.
- (For techies: This change includes a head patch to ExitToShell.)
- • Added the capability to hide all screen boundaries whenever a screen
- saver is recognized.
- • Added the capability to undo any unexpected moves done to the screen
- boundaries, e.g. by switching resolutions on a multisync monitor.
- • Fixed a silly hidden bug and made lots of cosmetic enhancements.
- • Increased the partition size to 45 K (more features require more space…).
-
-
- ••• KindWare™ — a gift to the whole of MacKind™ •••
-
- Small Screen is © 1990-1996 by Daniel Schaerer. It may be freely distri-
- buted, but always in its unmodified form and together with this document.
- It must not be sold for profit, nor included in any product sold for profit,
- without my explicit permission. Enjoy, share, and be kind™ to one another.
-
-
- Comments, wishes and suggestions welcome. THINK Pascal source code
- available on request.
-
-
- Daniel Schaerer
- Brunngasse 6
- CH-8001 Zürich
- Switzerland
-
- schaerer@ifi.unizh.ch
-