Magnum One

home *** CD-ROM | disk | FTP | other *** search

/ Magnum One / Magnum One (Mid-American Digital) (Disc Manufacturing).iso / d18 / techjock.arc / MANUAL.TTT < prev next >

Wrap

Text File | 1988-11-18 | 115KB | 6,403 lines

This file contains an abridged version of the user manual. The only reason for not including the full manual on the disk is that it takes too much space and it is formatted for a typeset printer, not an ascii file. If you use the product, please register your copy. One of the benefits of full registration is a top quality bound manual. Enjoy Bob "Technojock" Ainsbury P.S. The abridged version is 97 pages long!! C H A P T E R 1 USING THE TOOLKIT INTRODUCTION TechnoJocks Turbo Toolkit is a collection of procedures and functions for Turbo Pascal programmers. It will reduce the time taken to write applications and is designed for novice and expert programmer alike. The real purpose of the Toolkit is to provide easy-to-implement procedures that free the programmer from the more tedious and repetitive programming chores, such as windows, menus, user input, string formatting, directory listing etc. The programmer (or software engineer if you are from California!) can concentrate on the real purpose of the program. The Toolkit is designed specifically to operate with Turbo Pascal v4.0 from Borland International. (Contact TechnoJock for versions that work with other compilers.) The full source code for all of the Toolkit is included so that the code may be reviewed and modified. The quickest way of gaining an appreciation of the capabilities of the Toolkit is to execute the program DemoTTT.exe. This program demonstrates most of the procedures and functions available. The demo itself was, of course, written with the Toolkit. If you haven't run it yet, run it now! DISTRIBUTION DISK Listed below are the files contained on the distribution disk: FastTTT.pas source code for screen writing unit FastTTT.tpu screen writing unit FastTTT.asm assembler source code for screen writing unit FastTTT.obj assembler object code for screen writing unit WinTTT.pas source code for window unit WinTTT.tpu window unit WinTTT.asm assembler source code for window unit WinTTT.obj assembler object code for window unit KeyTTT.pas source code for keyboard/mouse unit KeyTTT.tpu keyboard/mouse unit MenuTTT.pas source code for menu unit MenuTTT.tpu menu unit PullTTT.pas source code for pulldown menu unit PullTTT.tpu pulldown menu unit DirTTT.pas source code for directory lister unit DirTTT.tpu directory lister unit StrngTTT.pas source code for string unit StrngTTT.tpu string unit IOTTT.pas source code for screen input unit IOTTT.tpu screen input unit MiscTTT.pas source code for miscellaneous unit MiscTTT.tpu miscellaneous unit ReadTTT.pas source code for single line input unit ReadTTT.tpu single line input unit DemoTTT.pas source code for flagship demonstration program DemoTTT.exe executable demonstration program In addition to the above files, there are a number of demonstration files that are designed to illustrate how to use unit. Each demonstration filename is of the format ?????dem.pas. INSTALLING THE TOOLKIT All you need to do to install the Toolkit is copy the unit files (i.e.'*.TPU') from the distribution disk to the directory where the Turbo Pascal units (such as CRT.TPU) are stored. If you are not sure which directory the units are stored in, copy them into the directory where you execute Turbo. You can check your default directories by executing the Turbo integrated environment (Turbo.exe) and selecting the DIRECTORIES pick from the OPTIONS menu - refer to the Turbo Pascal Owners Handbook, page 163. In addition, you could copy all the other files to your working Turbo directory, but this is only necessary if you wish to modify the source code or execute the demo programs. HOW THE TOOLKIT WORKS Basics -- Turbo Pascal allows libraries of constants, data types, variables, procedures and functions to be grouped together into UNITS. The Toolkit provides a variety of different units ready to use in your programs. Each unit (a file with an extension of '.TPU') is already debugged and fully functional, all you have to do is indicate in your program which units you want to use and then all the power of the unit is available. Refer to Chapter 4 (page 61) of the Turbo Pascal Owners Handbook for a much more eloquent and detailed explanation of units. You do not need to understand the internal workings of any of the Toolkit units in order to use them - all you need to know is how to call the procedures and functions. Example 1 The technique is best illustrated with an example. In the unit FastTTT there is a procedure for drawing boxes called BOX. A somewhat primitive program to draw a box on the screen would be as follows: PROGRAM TOOLKIT_DEMO; USES FASTTTT; BEGIN BOX(1,1,80,25,15,4,1); END. All you need to know is the unit that contains the procedure Box and the syntax of the Box procedure. (If you must, take a peek at page 10 to see the detailed documentation for the BOX procedure!) That's all there is to it - no need to worry about drawing horizontal and vertical lines, or what the ascii codes are for the box corners etc. Example 2 The above example is useful to illustrate the most basic concept of the toolkit but it is unlikely that you will always be writing five line programs! More typically, you will want to use procedures and functions from a variety of the Toolkit units. All you need to do is "use" all the units that contain the procedures you want to call. For example, let's say we want to expand the above program to draw a filled box and write the date in a neat (!) format at the top of the screen: PROGRAM IMPROVED_TOOLKIT_DEMO; USES FASTTTT, DOS, MISCTTT; BEGIN FBOX(1,1,80,25,15,4,1); WRITECENTER(2,14,4,DATE); END. The FBox and WriteCenter procedures are in the FastTTT unit and the Date function is in the MiscTTT unit. But, the MiscTTT unit itself needs to use the DOS unit (OK, take a quick look at page 115 and see the documentation for DATE!). The order of the units declared in the USES statement is important but the Toolkit documentation clearly indicates which units must be declared and in what order. As a habit, I recommend that the first unit in the uses statement should be CRT - this is the screen handler unit distributed with the compiler and includes commonly used procedures and functions such as ClrScr. Refer to page 65 of the Turbo Pascal Owners Handbook for further information about the uses clause. The ?????DEM.pas files on the distribution disk are designed to further illustrate the basic use of the Toolkit Attr FastTTT Purpose To combine foreground and background colors as a single attribute byte. Result type byte; Declaration Attr(F,B:byte):byte; F is the foreground color (0..15) B is the background color (0..15) Uses FastTTT. Remarks The video memory for an 80 by 25 character screen is composed of 2000 bytes of data. There is an attribute byte and a character byte for each of the 1000 character positions on the screen. This simple function will combine a foreground color (F) with a background color (B) to form a single attribute byte. The valid color ranges are 0 to 15. (Refer to Appendix B for a color table.) If a background color is set greater than 7 then "flashing" characters will result. See also Fastwrit, PlainWrite. Example USES FASTTTT; VAR MSG_COL : BYTE; BEGIN MSG_COL := ATTR(15,4); END. The color attribute MSG_COL would be set to white on a red background. Box FastTTT Purpose To draw a rectangle or box on the screen. Declaration Box(X1,Y1,X2,Y2,F,B,Boxtype: byte); X1 is the top left X coordinate (1..79) Y1 is the top left Y coordinate (1..24) X2 is lower right X coordinate (2..80) Y2 is lower right Y coordinate (2..25) F is the foreground color (0..15) B is the background color (0..15) Boxtype is the box line type (see remarks) Uses FastTTT. Remarks The area inside the box is not cleared. The normal values for the Boxtype are: 1 Single line 2 Double line 3 Single top/bottom, double sides 4 Double top/bottom, single sides If a BoxType of 0 is passed the the procedure will use a space (' ') as the box character. If any other number (i.e. 5..256) is used, the box is drawn using the ascii character represented by the number. Refer to the Turbo Pascal Owner's Handbook page 568 to see the ascii table. See also FBox, GrowFBox. Example USES CRT, FASTTTT; BEGIN CLRSCR; BOX(1,1,80,12,WHITE,RED,1); BOX(1,13,80,25,BLUE,LIGHTGRAY,2); END. The screen would be cleared, a single lined box would be drawn on the top half of the screen, and a double lined box in the lower half. Note that the CRT unit was also USED - this allowed the use of ClrScr, and the colors could be referred to by name rather than their numeric code. ClearLine FastTTT Purpose To clear all text on a specific line of the screen. Declaration ClearLine(Y,F,B:integer); Y is the line number on the screen to be cleared (1..25) F is the foreground color of the blank line (0..15) B is the background color of the blank line (0..15) Uses FastTTT. Remarks The actual display color of the line will be set to B. The only reason for setting the foreground color is to change the attribute byte, for subsequent writes. See also ClearText. Example USES FASTTTT; BEGIN CLEARLINE(25,15,0); END. The 25th line of the screen is cleared with a black background. ClearText FastTTT Purpose To clear all text on a rectangular section of the screen. Declaration ClearText(X1,Y1,X2,Y2,F,B:integer); X1 is the top left X coordinate (1..79) Y1 is the top left Y coordinate (1..24) X2 is lower right X coordinate (2..80) Y2 is lower right Y coordinate (2..25) F is the foreground color of the blank line (0..15) B is the background color of the blank line (0..15) Uses FastTTT. Remarks The actual display color of the area will be set to B. The only reason for setting the foreground color is to change the attribute byte, for subsequent writes. See also ClearLine, PlainWrite. Example USES FASTTTT; BEGIN CLEARTEXT(1,1,40,25,15,0); END. The lefthand side of the screen is cleared with a black background. CurrentDisplay FastTTT Purpose Used internally to determine the current type of videocard. Result DisplayType; Declaration CurrentDisplay: DisplayType; The DisplayType is Monochrome, CGA, EGA, MCGA, or VGA Uses FastTTT. Remarks This function is used internally. See also ReinitFastwrite Fastwrite FastTTT Purpose The core procedure of the unit for fast screen writes. Declaration Fastwrit(Col, Row, Attr:byte; St: string);external Col is the X coord of first char. in string (1..80) Row is the Y coord of string (1..25) Attr is the color attribute St is the string or text to be displayed Uses FastTTT. Remarks This procedure is external and the source code is actually in assembly language. (See the file FastTTT.asm on the distribution disk, if you're interested.) I recommend you use the WriteAT procedure in preference to Fastwrit, because it can pass foreground and background colors rather then the combined color attribute. If the text is too long to fit on the screen, it will be wrapped onto the next line. See also Attr, WriteAT, PlainWrite, WriteVert. Example USES FASTTTT BEGIN FASTWRITE(1,1,14,'TOP LEFT OF SCREEN'); FASTWRITE(59,25,ATTR(14,4),'BOTTOM RIGHT OF SCREEN;); END; FBox FastTTT Purpose To draw a box and clear the screen inside the box. Declaration FBox(X1,Y1,X2,Y2,F,B,Boxtype:integer); X1 is the top left X coordinate (1..79) Y1 is the top left Y coordinate (1..24) X2 is lower right X coordinate (2..80) Y2 is lower right Y coordinate (2..25) F is the foreground color (0..15) B is the background color (0..15) Boxtype is the box line type (see remarks) Uses FastTTT. Remarks The normal values for the Boxtype are: 1 Single line 2 Double line 3 Single top/bottom, double sides 4 Double top/bottom, single sides If a BoxType of 0 is passed, the procedure will use a space (' ') as the box character. If any other number (i.e. 5..256) is used, the box is drawn using the ascii character represented by the number. Refer to page 568 of the Turbo Pascal Owner's Handbook to see the ascii table. See also Box, GrowFBox. Example USES CRT, FASTTTT; BEGIN FBOX(1,1,80,12,WHITE,RED,1); FBOX(1,13,80,25,BLUE,LIGHTGRAY,2); END. A single lined box would be drawn on the top half of the screen and the area inside the box would be cleared to a red background. A double lined box would be drawn in the lower half, and the area inside the box would be cleared to lightgray. Note that the CRT unit was also USED, so the colors could be refered to by name rather than their numeric code. GrowFBox FastTTT Purpose To draw a box and clear the screen inside the box. This procedure is the functional equivalent to FBox, but the box grows (or explodes!) on the screen for a fancy visual effect. Declaration GrowFBox(X1,Y1,X2,Y2,F,B,Boxtype:integer); X1 is the top left X coordinate (1..79) Y1 is the top left Y coordinate (1..24) X2 is lower right X coordinate (2..80) Y2 is lower right Y coordinate (2..25) F is the foreground color (0..15) B is the background color (0..15) Boxtype is the box line type (see remarks) Uses FastTTT. Remarks The normal values for the Boxtype are: 1 Single line 2 Double line 3 Single top/bottom, double sides 4 Double top/bottom, single sides If a BoxType of 0 is passed the the procedure will use a space (' ') as the box character. If any other number (i.e. 5..256) is used the box is drawn using the ascii character represented by the number. Refer to page 568 of the Turbo Pascal Owner's Handbook to see the ascii table. If the box grows too quickly or too slowly, alter the global variable Speed. The default value is 200; increase the value to slow the speed down (ugh!) or decrease it to speed the box up. See also Box, FBox. Example USES CRT, FASTTTT; BEGIN SPEED := 400; GROWFBOX(1,1,80,12,WHITE,RED,1); GROWFBOX(1,13,80,25,BLUE,LIGHTGRAY,2); END. HorizLine FastTTT Purpose To draw a horizontal line on the screen. Declaration HorizLine(X1,X2,Y,F,B,LineType: integer); X1 is the left X coordinate (1..79) X2 is the right X coordinate (2..80) Y is the Y coordinate (1..25) F is the foreground color (0..15) B is the background color (0..15) Linetype is the line type (see remarks) Uses FastTTT. Remarks The normal values for the Linetype are: 1 Single line 2 Double line X2 may be larger than X1. See also VertLine Example USES CRT,FASTTTT; BEGIN HORIZTLINE(10,17,13,LIGHTCYAN,BLUE,1); END. Draws a single horizontal line across the center of the screen. PlainWrite FastTTT Purpose To write text to the screen very quickly in the default color attribute. Declaration PlainWrite(Col, Row: byte; St: string); external; Col is the X coord of first char. in string (1..80) Row is the Y coord of string (1..25) St is the string or text to be displayed Uses FastTTT. Remarks This procedure is external and the source code is actually in assembly language (see the file FastTTT.asm on the distribution disk, if you're interested). This procedure is very similar to Fastwrite but it uses the current color attribute for each character. It is even faster than Fastwrite! See also WriteAT, FastWrite, WriteVert. Example USES CRT, FASTTTT BEGIN CLEARTEXT(1,1,80,25,WHITE,BLACK); PLAINWRITE(1,1,'TOP LEFT OF SCREEN'); PLAINWRITE(59,25,'BOTTOM RIGHT OF SCREEN;); END; The screen is cleared to a black background with a white foreground, and the two phrases are written to the screen in white letters. ReInitFastWrite FastTTT Purpose To initialize variables referenced internally by Fastwrite. Declaration ReinitFastWrite;external; Uses FastTTT. Remarks This procedure is automatically called at the commencement of any program that uses the FastTTT unit. (Refer to page 64 of the Turbo Pascal Owner's Handbook for a further explanation of initialized procedures.) It would not normally be necessary to call this procedure. This procedure is external and the source code is actually in assembly language. (See the file FastTTT.asm on the distribution disk, if you're interested.) Replicate FastTTT Purpose To construct a string of repeated characters Declaration (N:byte; C:Char): string; Uses FastTTT. Result type String Remarks This function uses memory moves and is much faster than a "for" loop. Example USES FASTTTT; VAR TXT:STRING; BEGIN TXT := REPLICATE(80,'+'); FASTWRITE(1,1,14,TXT); END. The variable Txt is set to an 80 character string composed of +'s i.e. '++++++++++....+++++++++'. The string is then written to the first line of the screen in yellow. Note that these two procedures could be combined to form a single statement: FastWrite(1,1,14,Replicate(80,'+')); VertLine FastTTT Purpose To draw a vertical line on the screen. Declaration VertLine(X,Y1,Y2,F,B,LineType: integer); X is the X coordinate (1..80) Y1 is the upper Y coordinate (1..24) Y2 is the lower Y coordinate (2..25) F is the foreground color (0..15) B is the background color (0..15) Linetype is the line type (see remarks) Uses FastTTT. Remarks The normal values for the Linetype are: 1 Single line 2 Double line Y2 may be larger than Y1. See also HorizLine Example USES CRT,FASTTTT; BEGIN VERTLINE(40,1,25,LIGHTCYAN,BLUE,2); END. Draws a double vertical line down the center of the screen. WriteAT FastTTT Purpose To writes directly to the screen el quicko in specified colors. Declaration WriteAT(X,Y,F,B: integer; St: string); X is the X coord of first character in the string (1..80) Y is Y coord of string F is the foreground color (0..15) B is the background color (0..15) St is the text string Uses FastTTT. Remarks This is the most frequently used procedure in the Toolkit. It is preferrable to Fastwrite (for most of us), because you can specify the foreground and background colors separately. This procedure cannot be used to write integers or reals - first convert the number to a string using the Int_to_Str function in the StrngTTT unit. See also Fastwrit, PlainWrit, WriteVert. Example USES CRT,FASTTTT; CONST HEADING = 'TOOLKIT'; VAR NAME: STRING; BEGIN NAME := 'BOB ''TECHNOJOCK'' AINSBURY'; WRITEAT(1,25,YELLOW,RED,'PRESS F1 FOR HELP'); WRITEAT(36,1,LIGHTGREEN,BLACK,HEADING); WRITEAT(1,5,LIGHTCYAN,BLACK,NAME); WRITEAT(60,20,WHITE,BLACK,'HELLO '+'THERE!'); END. The example writes various strings to the screen, and illustrates that string constants/variables and concatenated strings are valid. WriteBetween FastTTT Purpose To write text centered between two points. Declaration WriteBetween(X1,X2,Y,F,B: integer; ST: string); X1 is the left most X coord (1..79) X2 is the right most X Coord (2..80) Y is the Y coord or line number (1..25) F is the foreground (0..15) B is the background (0..15) ST is the string or text to be displayed Uses FastTTT. Remarks If the length of the string is greater than the distance between the X coordinates, the string will simply be written commencing at X1. See also WriteCenter, WriteAT. Example USES FASTTTT; BEGIN WRITEBETWEEN(1,40,15,0,'LEFT SIDE'); WRITEBETWEEN(41,80,14,0,'RIGHT SIDE'); END. WriteCenter FastTTT Purpose To write text on the center of a line Declaration WriteCenter(Y,F,B: integer; ST: string); Y is the Y coord or line number (1..25) F is the foreground color (0..15) B is the background color (0..15) ST is the string or text to be displayed Uses FastTTT. Remarks The same rules apply as for WriteAT e.g. no reals/integers, strings may be concatenated etc. See also WriteAT, WriteBetween. Example USES FASTTTT; BEGIN WRITECENTER(1,13,0,'MAJOR HEADING'); END. WriteVert FastTTT Purpose To write a string vertically. Declaration WriteVert(X,Y,F,B: integer; ST: string); X is X coord of first character in string (1..25) Y is Y coord of first character in string (1..80) F is the foreground color B is the background color ST is the string or text to be displayed Uses FastTTT. Remarks This odd little procedure will write a string down the screen rather than across the screen. If the string is too long to fit on the screen, it will be truncated. Example Uses FastTTT; begin WriteVert(10,5,15,0,'Y Axis'); end. Attrib WinTTT Purpose To change the display color (attribute) for part or all of the screen. Declaration Attrib(X1,Y1,X2,Y2,F,B:integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) F is the foreground color (0..15) B is the background color (0..15) Uses Crt, FastTTT, DOS, WinTTT. Remarks The characters themselves are not changed, only their display color. See also ClearText. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN ATTRIB(1,13,80,35,LIGHTGRAY,BLACK); END. The lower half of the screen display is changed to light gray characters on a black background. CopyScreenBlock WinTTT Purpose To copy one part of the screen to another area of the display. Declaration CopyScreenBlock(X1,Y1,X2,Y2,X,Y:integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) X is the top left X coord of the target location (1..80) Y is the top left Y coord of the target location (1..25) Uses Crt, FastTTT, DOS, WinTTT. Remarks The data is copied or duplicated to another location on the screen. Use the procedure MoveScreenBlock if you want to physically move the information whilst blanking the source area. The copy operation actually occurs one line at a time, so unexpected results may occur if the source and target zones overlap. See Also MoveScreenBlock. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN COPYSCREENBLOCK(1,1,80,2,1,24); END. The top two lines of the screen are copied to the bottom two lines of the screen. DisposeScreen WinTTT Purpose To free heap space that was allocated to store a screen image. Declaration DisposeScreen(Page: byte); Page is the number of the screen that was saved with save screen. Uses Crt, FastTTT, DOS, WinTTT. Remarks If you have restored a screen using RestoreScreen and you no longer need the saved screen image, call this procedure to trash the saved image and free the heap space for re-use by the program The Toolkit uses the Turbo Pascal procedures Getmem and Freemem. You should not use the conflicting Mark and Release heap management procedures anywhere in your program. See also SaveScreen, RestoreScreen. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SAVESCREEN(1); .... . . . {SOME OTHER PROCEDURES THAT CHANGE THE SCREEN} .... RESTORESCREEN(1); DISPOSESCREEN(1); END. FillScreen WinTTT Purpose To fill part or all of the screen with a specific character. Declaration FillScreen(X1,Y1,X2,Y2,F,B:integer; C:char); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) F is the foreground color (0..15) B is the background color (0..15) C is the character (any displayable ASCII character) Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure provides a very fast way of filling the screen with a specific character. It is useful for creating interesting backgrounds for menus and the like. Use the procedure ClearText to clear a portion of the screen. See also ClearText Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN FILLSCREEN(1,1,80,25,CYAN,BLACK,CHR(177); END. The whole screen is filled with the ASCII character 177. It gives a blocked stipple effect. See the MenuDem.pas program on the distribution disk for a visual example. FindCursor WinTTT Purpose To return the location and size of the cursor. Declaration FindCursor(var X,Y,ScanTop,ScanBot: byte); X is the X coord of the cursor (1..80) Y is the Y coord of the cursor (1..25) Scantop is the top scan line of the cursor ScanBot is the bottom scan line of the cursor Uses Crt, FastTTT, DOS, WinTTT. Remarks. This procedure is called by many of the screen saving procedures. The four parameters must be variables, and they are returned with the cursor details. The scan codes refer to the actual location of the top and bottom of the cursor within a character field, where zero is the top of the field (such as the top stroke of the letter T -- got it?), and either 13 or 7 is the bottom of the field on monochrome or color machines respectively. See also SizeCursor, OnCursor, OffCursor, HalfCursor, FullCursor. Example USES CRT, FASTTTT, DOS, WINTTT VAR ROW,COL,TOP,BOT: BYTE; BEGIN FINDCURSOR(COL,ROW,TOP,BOT); END. FullCursor WinTTT Purpose To change the text cursor to a full block. Declaration FullCursor; Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure automatically sets the cursor on monochrome and color systems. See also SizeCursor, HalfCursor, Oncursor, Offcursor. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN FULLCURSOR; END. GrowMkWin WinTTT Purpose To create a text window on the screen and saves the screen contents that has been overlayed. This procedure is the functional equivalent of MkWin, except that the window box explodes onto the screen. Declaration GrowMkWin(X1,Y1,X2,Y2,F,B,Boxtype: integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) F is the foreground color (0..15) B is the background color (0..15) BoxType is the window box line type (see remarks) Uses Crt, FastTTT, DOS, WinTTT. Remarks The specifications are the same as for GrowFBox. The normal values for the Boxtype are: 1 Single line 2 Double line 3 Single top/bottom, double sides 4 Double top/bottom, single sides If a BoxType of 0 is passed, the procedure will use a space (' ') as the box character. If any other number (i.e. 5..256) is used, the box is drawn using the ascii character represented by the number. Refer to page 568 of the Turbo Pascal Owner's Handbook to see the ascii table. If the box grows too quickly or too slowly, alter the global variable Speed. The default value is 200; increase the value to slow the speed down, or decrease it to speed the box up. See also Mkwin, RmWin Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SPEED := 400; GROWMKWIN(1,1,80,12,WHITE,RED,1); END. HalfCursor WinTTT Purpose To make the text cursor into a half block. Declaration HalfCursor; Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure automatically sets the cursor on monochrome and color systems. See also SizeCursor, FullCursor, Oncursor, Offcursor. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN HALFCURSOR; END. MkWin WinTTT Purpose To create a text window on the screen and save the screen contents that has been overlayed. Declaration MkWin(X1,Y1,X2,Y2,F,B,Boxtype: integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) F is the foreground color (0..15) B is the background color (0..15) BoxType is the window box line type (see remarks) Uses Crt, FastTTT, DOS, WinTTT. Remarks The specifications are the same as for FBox. The normal values for the Boxtype are: 1 Single line 2 Double line 3 Single top/bottom, double sides 4 Double top/bottom, single sides If a BoxType of 0 is passed, the procedure will use a space (' ') as the box character. If any other number (i.e. 5..256) is used the box is drawn using the ascii character represented by the number. Refer to page 568 of the Turbo Pascal Owner's Handbook to see the ascii table. If the box grows too quickly or too slowly, alter the global variable Speed. The default value is 200; increase the value to slow the speed down, or decrease it to speed the box up. See also GrowMkWin, RmWin Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SPEED := 400; MKWIN(1,1,80,12,WHITE,RED,1); END. MoveScreenBlock WinTTT Purpose To move one part of the screen to another area of the display. Declaration MoveScreenBlock(X1,Y1,X2,Y2,X,Y:integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) X is the top left X coord of the target location (1..80) Y is the top left Y coord of the target location (1..25) Uses Crt, FastTTT, DOS, WinTTT. Remarks The data is moved to another location on the screen and the original source area is blanked out. Use CopyScreenBlock to leave the source area in tact. See Also CopyScreenBlock. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN COPYSCREENBLOCK(1,1,40,25,41,1); END. The left half of the screen is moved over to the right side. OffCursor WinTTT Purpose To make the text cursor disappear. Declaration OffCursor; Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure automatically hides the cursor on monochrome and color systems. See also SizeCursor, HalfCursor, Oncursor, Fullcursor. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN OFFCURSOR; END. OnCursor WinTTT Purpose To make the text cursor appear in the normal DOS shape. Declaration OnCursor; Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure automatically displays the cursor on monochrome and color systems. See also SizeCursor, HalfCursor, Offursor, Fullcursor. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN ONCURSOR; END. PartRestore WinTTT Purpose To transfer data from a variable to a screen location. Declaration PartRestore(X1,Y1,X2,Y2: byte;var Source); Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure is used internally by the Toolkit. See also PartRestoreScreen, RestoreScreen, PartSave. PartRestoreScreen WinTTT Purpose To restore a portion of a saved screen to the display. Declaration PartRestoreScreen(Page,X1,Y1,X2,Y2,X,Y: integer); Page is the number of the saved screen X1 is the top left X coord of saved screen (1..80) Y1 is the top left Y coord of saved screen (1..25) X2 is the lower X coord of saved screen (1..80) Y2 is the lower Y coord of saved screen (1..25) X is the top left X coord of the target location (1..80) Y is the top left Y coord of the target location (1..25) Uses CRT, FastTTT, DOS, WinTTT. Remarks The procedure is used to restore part of a screen that was previously saved with SaveScreen. The first four coord. parameters indicate which part of the saved screen should be restored, and the last pair of coords indicate the position on the screen where the top left corner of the restored data is located. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SAVESCREEN(1); ..... .. {SCREEN MODIFYING PROCEDURES} ..... PARTRESTORESCREEN(1,1,1,80,12,1,13); DISPOSESCREEN(1); END. In this example, the screen is saved (let's assume there was something meaningful on the screen at that point), then some other procedures modify the screen display. The top half of the saved screen is then restored to the lower half of the screen display. PartSave WinTTT Purpose To transfer data from the screen to a variable. Declaration PartSave(X1,Y1,X2,Y2: byte;var Dest); Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure is used internally by the Toolkit. See also SaveScreen. RestoreScreen WinTTT Purpose To restore a previously saved screen. Declaration RestoreScreen(Page: byte); Page is the number of the previously saved screen Uses Crt, FastTTT, DOS, WinTTT. Remarks Only use a page number of a screen that was specified with a previous SaveScreen, otherwise unpredictable results will occur e.g. flashing happy faces. RestoreScreen will return the cursor to the position it was at immediately prior to the corresponding SaveScreen. See also SaveScreen, DisposeScreen, SlideRestoreScreen. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SAVESCREEN(1); ..... .. {SCREEN MODIFYING PROCEDURES} ..... RESTORESCREEN(1); DISPOSESCREEN(1); END. RmWin WinTTT Purpose To remove a window and restore the original screen contents. Declaration RmWin; Uses Crt, FastTTT, DOS, WinTTT. Remarks The RmWin procedure removes the last displayed window. Successive RmWin statements will remove the earlier displayed windows. If RmWin is called when there are no windows, the procedure simplr returns i.e. no problem. The windows are always removed in reverse order e.g. you cannot create 3 windows in succession and then try to remove the second window without first removing the third one. See also MkWin. Example USES CRT, FASTTTT, DOS, WINTTT; VAR CH : CHAR; BEGIN MKWIN(25,20,65,25,WHITE,RED,1); WRITEBETWEEN(25,65,23,WHITE,RED,'DO YOU WANT TO EXIT (Y/N)?'); CH := GETKEY; IF UPCASE(CH) = 'Y' THEN HALT ELSE RMWIN; END. The above program paints a red window with a white single line border on the last five lines of the screen, and displays a message in the center of the box. If the user responds Y then the program terminates, otherwise the window is removed and the program continues. SaveScreen WinTTT Purpose To save a screen for subsequent restore. Declaration SaveScreen(Page: byte); Page is the number assigned to the saved screen Uses Crt, FastTTT, DOS, WinTTT. Remarks This procedure will save a full copy of the screen and all the attributes i.e. the colors. The location of the cursor is also saved. Multiple screens can be saved (up to Max_Screens, see Interface Declarations at beginning of chapter) at the same time. The Page number assignment can be arbitrary, but it is good practice to save them in ascending order starting from page 1. If a page is already saved to a particular Page and another screen is saved to that same Page, the saved screen will be overwritten. See also RestoreScreen, DisposeScreen, SlideRestoreScreen. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SAVESCREEN(1); ..... .. {SCREEN MODIFYING PROCEDURES} ..... RESTORESCREEN(1); DISPOSESCREEN(1); END. ScrollUp WinTTT Purpose To scroll all or part of the screen upward one line. Declaration ScrollUp(X1,Y1,X2,Y2:integer); X1 is the top left X coordinate (1..80) Y1 is the top left Y coordinate (1..25) X2 is the lower X coordinate (1..80) Y2 is the lower Y coordinate (1..25) Uses Crt, FastTTT, DOS, WinTTT. Remarks All the text is moved up one line and the lower line is replaced with with blanks. The characters and their color attributes are scrolled. See also CopyScreenBlock, MoveScreenBlock. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SCROLLUP(10,1,70,5); END. SizeCursor WinTTT Purpose To change the cursor shape/appearance. Declaration SizeCursor(ScanTop,ScanBot: byte); Scantop is the top scan line of the cursor ScanBot is the bottom scan line of the cursor Uses Crt, FastTTT, DOS, WinTTT. Remarks. This procedure is called by OnCursor, OffCursor, HalfCursor and FullCursor, and these other procedures should normally be used in preference to SizeCursor because they automatically accommodate monochrome and color systems. The scan codes refer to the actual location of the top and bottom of the cursor within a character field, where zero is the top of the field (such as the top stroke of the letter T -- got it?), and either 13 or 7 is the bottom of the field on monochrome or color machines respectively. The cursor can be hidden by setting the top scan line to 14 -- see OffCursor. See also FindCursor, OnCursor, OffCursor, HalfCursor, FullCursor. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN IF BASEOFSCREEN = $B800 THEN SIZECURSOR(5,7) ELSE SIZECURSOR(9,13); END. SlideRestoreScreen WinTTT Purpose To restore a previously saved screen. This procedure is the functional equivalent of RestoreScreen except that the text s..l...i...d....e.....s onto the screen Declaration SlideRestoreScreen(Page: byte; Way: direction); Page is the number of the previously saved screen Way is the direction to slide i.e. up, down, left or right Uses Crt, FastTTT, DOS, WinTTT. Remarks Only use a page number of a screen that was specified with a previous SaveScreen, otherwise unpredictable results will occur e.g. flashing happy faces. RestoreScreen will return the cursor to the position it was at immediately prior to the corresponding SaveScreen. See also SaveScreen, DisposeScreen, RestoreScreen. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN SAVESCREEN(1); ..... .. {SCREEN MODIFYING PROCEDURES} ..... SLIDERESTORESCREEN(1,DOWN); DISPOSESCREEN(1); END. TempMessage WinTTT Purpose To display a message anywhere on the screen, wait for a keypress (or mouse activity), and then restore the original screen contents. Declaration TempMessage(X,Y,F,B: integer; St: string); X is the X coord of the first character (1..80) Y is the Y coordinate or display line (1..25) F is the foreground color (0..15) B is the background color (0..15) St is the string or message text Uses Crt, FastTTT, DOS, WinTTT. Remarks The procedure temporarily stores the line of text together with its color attributes. It displays the temporary message, and after a key is pressed (any key, or any mouse activity), the original text and color attributes are restored to the screen. Note that the procedure does not return which key was pressed. This is one of the most popular procedures in the Toolkit and is most useful when the screen is very busy and you want to display an error or warning message without modifying the display. Example USES CRT, FASTTTT, DOS, WINTTT; BEGIN TEMPMESSAGE(1,1,YELLOW,RED,'YOU CANNOT REFORMAT THE NETWORK!'); END. Confine_Mouse_Horiz KeyTTT Purpose To restrict the screen position of the mouse cursor horizontally. Declaration Confine_Mouse_Horiz(Left,Right: integer); Left is the left most X coord (1..80) Right is the right most X coord (1..80) Uses CRT, DOS, KeyTTT. Remarks If the mouse is outside the confined coords when the restrictions are made, the mouse is repositioned inside the nearest boundary, as soon as any mouse activity occurs . See also Confine_Mouse_Vert. Example USES CRT, DOS, KEYTTT; BEGIN HIDE_MOUSE_CURSOR; CONFINE_MOUSE_HORIZ(20,60); SHOW_MOUSE_CURSOR; END. The mouse is resticted to movement between columns 20 and 60. Confine_Mouse_Vert KeyTTT Purpose To restrict the screen position of the mouse cursor vertically. Declaration Confine_Mouse_Vert(Top,Bot: integer); Top is the upper most Y coord (1..25) Bot is the lower most Y coord (1..25) Uses CRT, DOS, KeyTTT; Remarks If the mouse is outside the confined coords, then as soon as any mouse activity occurs (or a mouse function is called) the mouse is repositioned inside the nearest boundary. See also Confine_Mouse_Horiz. Example USES CRT, DOS, KEYTTT; BEGIN HIDE_MOUSE_CURSOR; CONFINE_MOUSE_HORIZ(20,60); CONFINE_MOUSE_VERT(5,15); SHOW_MOUSE_CURSOR; END. The mouse is resticted to movement between columns 20 to 60, and between rows 5 to 15. DelayKey KeyTTT Purpose To pause while user presses key or a specified time period elapses. Declaration DelayKey(Time: integer); Time is the maximum pause in seconds. Uses CRT, DOS, KeyTTT. Remarks This is one of my favorites. The system pauses until a key is pressed or, if a key isn't pressed, until a specified time has elapsed. Very useful for temporarily displaying messages, copyright screens etc. As soon as the user presses a key (or there is mouse activity) the procedure ends. See also GetKey. Example USES CRT, DOS, KEYTTT; BEGIN DISPLAY_HELP; {SOME EARLIER DEFINED PROCEDURE} DELAYKEY(5); CLRSCR; END. A help screen is displayed for up to 5 seconds or until a key is pressed. GetKey KeyTTT Purpose To read a character from the keyboard. Declaration GetKey:char; Returns Char Uses CRT, DOS, KeyTTT. Remarks This is the main function in the KeyTTT unit and is called throughout the Toolkit. This is a fully functional replacement for Turbo's internal ReadKey command. Refer to Appendix B for a full list of all the character codes that are returned. See also Delay_Key. Example USES CRT, FASTTTT, DOS, KEYTTT; VAR CH : CHAR; BEGIN WRITECENTER(25,LIGHTCYAN,BLUE,'PRESS F10 TO CONTINUE'); CH := GETKEY; IF CH <> #196 THEN HALT; END. The code for F10 is #196, see appendix B. Get_Mouse_Action KeyTTT Purpose Determine mouse activity i.e. movement and button presses. Declaration Get_Mouse_Action(var But:button; var Hor, Ver: integer); But is retuned with one of NoB, LeftB, RightB, BothB Hor and Ver return the horizontal and vertical movement Uses CRT, DOS, KeyTTT. Remarks This procedure is designed for internal use and is called by GetKey. The Hor & Ver variables return the movement in cols and rows not pixels i.e. Pixel div 8. The movement is returned relative to the position of the mouse the last time the procedure was called. Example USES CRT, DOS, KEYTTT; VAR B : BUTTON; X,Y : INTEGER; BEGIN REPEAT GET_MOUSE_ACTION(B,X,Y); UNTIL B = LEFTB; END. This program continues looping until the left mouse button is pressed. Hide_Mouse_Cursor KeyTTT Purpose To hide the mouse cursor from view! Declaration Hide_Mouse_Cursor; Uses CRT, DOS, KeyTTT. Remarks The mouse cursor is set on with the Show_Mouse_Cursor procedure. The normal text Cursor is not affected by this procedure, and the OffCursor procedure should also be called to turn it off. See also Show_Mouse_Cursor. Example USES CRT, DOS, KEYTTT; BEGIN HIDE_MOUSE_CURSOR; END. See the file MouseDem.pas on the distribution disk for a more detailed example. Mouse_Installed KeyTTT Purpose To indicate if a Microsoft compatible mouse is installed. Declaration Mouse_Installed:boolean; Returns Boolean; Uses CRT, DOS, KeyTTT. Remarks This procedure is automatically called (if you include the KeyTTT unit in your program) and it updates the global variable Moused. Example USES CRT, DOS, KEYTTT; BEGIN IF NOT MOUSE_INSTALLED THEN HALT; END. See the file MouseDem.pas on the distribution disk for a more detailed example. Move_Mouse KeyTTT Purpose To reposition the mouse cursor. Declaration Move_Mouse(Hor,Ver:integer); Hor is the X coordinate (1..80) Ver is the Y coordinate (1..25) Uses CRT, DOS, KeyTTT. Remarks This procedure is the functional equivalent of GotoXY for the text cursor. See also Confine_Mouse_Horiz, Confine_Mouse_Vert. Example USES CRT, DOS, KEYTTT; BEGIN MOVE_MOUSE(40,13); END. The mouse cursor is moved to the center of the display. See the file MouseDem.pas on the distribution disk for a more detailed example. Set_Mouse_Cursor_Style KeyTTT Purpose To change the appearance of the mouse cursor. Declaration Set_Mouse_Cursor_Style(OrdChar:integer); OrdChar is the ASCII code for the desired cursor character. Uses CRT, DOS, KeyTTT. Remarks In text mode the shape of the mouse cursor can be any of the displayable ASCII characters - you can even make the cursor the letter 'C' if you feel so inclined! The default cursor is a small rectangle. Once the cursor style has been modified, it will assume the new style until the mouse is re-installed (usually from a reboot), or until this procedure changes it again. Refer to page 568 of the Turbo Pascal Owner's Handbook for a list of the ASCII characters and codes. See also Show_Mouse_Cursor. Example USES CRT, DOS, KEYTTT; BEGIN SET_MOUSE_CURSOR_STYLE(29); END. The cursor is changed to a double headed arrow. Show_Mouse_Cursor KeyTTT Purpose To reisplay the mouse cursor. Declaration Show_Mouse_Cursor; Uses CRT, DOS, KeyTTT. Remarks The mouse cursor is not normally displayed. Use this procedure to display the mouse and use Hide_Mouse_Cursor to turn it off again. See also Show_Mouse_Cursor, Confine_Mouse_Horiz, Confine_Mouse_Vert. Example USES CRT, DOS, KEYTTT; BEGIN SHOW_MOUSE_CURSOR; END. See the file MouseDem.pas on the distribution disk for a more detailed example. IO_AllowEsc IOTTT Purpose To indicate if Esc key is operative Type Optional. Declaration IO_AllowEsc(OK:boolean); OK is true if you want to allow the user to ESCape. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks The default is false, i.e. Esc is in-operative. If the user does ESC the return code from IO_Edit is set to 1. Example USES CRT, FASTTTT, DOS, WINTTT, KEYTTT, IOTTT; BEGIN IO_ALLOWESC(FALSE); END. IO_DefineMsg IOTTT Purpose To display a message when the user moves to the specified input field. Type Optional. Declaration IO_DefineMsg(ID, X, Y:byte;ST : string); ID is the ID number of the input field assigned with this message. X is the X coord of the first char of the message Y is the Y coord or display line of the message ST is the text or message Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks Every input field is assigned an ID in the IO_DefineStr routine. You can display a message when the user moves to any input field. When the user exits the field, the message is removed and the original screen content (which was overlayed by the message) is restored. You can define unique messages for one, some or all of the input fields. Example USES CRT, FASTTTT, DOS, WINTTT, KEYTTT, IOTTT; BEGIN IO_DEFINEMSG(7,1,25,'INPUT THE CHEST MEASUREMENT'); END. The message "Input the chest measurement" will be displayed at the bottom left of the screen, whenever the cursor is moved to input field 7. IO_DefineStr IOTTT Purpose To define all the characteristics of a specific input field. This is the major procedure in the IOTTT unit. Type Mandatory Declaration IO_DefineStr(ID, U,D,L,R, X,Y: byte; var DefString : string; DefFormat : string); See Remarks. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks ID is the ID number for this input field. Every field is assigned an ID number, the same ID number is used by the IO_DefineMsg procedure. It is logical (but not mandatory) to start with ID number 1 and increment by one as you define each field. U,D,L,R are four bytes which represent the ID's of the fields which the cursor should move to if the up, down, left or right edit keys respectively are pressed, . For example, 5,2,5,2 would state that if the up or left keys are pressed, the cursor will move to field ID 5, and if the down or right keys are pressed, the cursor will move to field ID 2. Got it? Note that an ID of zero (0) indicates that the input session will terminate (as if the End key had been pressed). This is a useful tool if you want to end a session after the last field has been updated and the user tries to move forward to the next input field. X,Y simply represent the X and Y coordinates of the first character in the input field. This is how you tell the system the location of the field on the screen. DefString is a previously declared parameter of type string which is returned from the IO procedure with the user's input. If you want to provide the user with a default entry, then set the value of DefString to the required default string, otherwise set it to null i.e. ''. DefFormat which is the format of the input field (as discussed previously under the sub-heading FORMATTING). Example See Major example on page 64. IO_DisplayFields IOTTT Purpose To display the input fields on the screen, prior to input. Type Optional. Declaration IO_DisplayFields; Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks Normally the fields are not displayed on the screen until the IO_Edit procedure is called. Call this procedure if you want to display the input fields before allowing the user to edit them. This procedure must be preceded by IO_SetFields, and all the IO_DefineStr statements. Example See Major example on page 64 IO_Edit IOTTT Purpose To control user input of data. Type Mandatory. Declaration IO_Edit(var Retcode: integer); Retcode must be an integer variable Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks When you have declared all the parameters and defined all the IO procedures (including any optional procedures such as color changes) then you're ready to let the user input and update the fields. IO_Edit does this and passes control to the user. The procedure returns control to your program when the user has ended the update session, either by pressing End or Esc (if it is enabled) or by pressing any of the move to next field keys (Enter, Tab, etc.) when the next field has been defined as ID zero. The Retcode variable is updated with a return code for the edit session. The return codes are : 0 for successful completion 1 if user pressed Esc key Example See Major example on page 64. IO_ResetFields IOTTT Purpose To dispose of memory used during IO process and reset the input variables to default values. Type Mandatory. Declaration IO_ResetFields; Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks This procedure is normally the next statement after IO_Edit. It discards all the field definitions from the Heap and sets all the optional settings (such as color) back to the default values. Example See Major example on page 64 IO_SetColors IOTTT Purpose To set the colors to your preferred values. Believe it or not, some people don't like my choice of colors! Type Optional Declaration IO_SetColors(HF,HB,LF,LB,MF,MB:byte); HF is the foreground color of the active field (0..15) HB is the background color of the active field (0..7) LF is the foreground color of the other fields (0..15) LB is the background color of the other fields (0..7) MF is the foreground color of the optional message (0..15) MB is the background color of the optional message (0..15) Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks The Toolkit will default to one of two sets, depending on whether the system is monochrome or color. Example USES CRT, FASTTTT, DOS, WINTTT, KEYTTT, IOTTT; BEGIN IF BASEOFSCREEN = $B800 THEN IO_SETCOLORS(YELLOW, RED, BLACK, LIGHTGRAY, LIGHTCYAN, BLUE); ELSE IO_SETCOLORS(WHITE, BLACK, LIGHTGRAY, BLACK, BLACK, LIGHTGRAY); END. IO_SetFields IOTTT Purpose Indicates the total number of input fields. Type Mandatory Declaration IO_SetFields(Tot: integer); Tot is the total number of input fields on the screen. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks This procedure must be the first IOTTT procedure. Pass the total number of input fields that will be defined. For example, IO_Setfields(5) advises the system that 5 input fields will be defined on the next input screen. The maximum number of fields is determined by the global constant MaxInputFields, see IOTTT.pas on the distribution disk. This constant may be changed to any desired value in the range 1..2000. Example See Major example on page 64 IO_SoundBeeper IOTTT Purpose To switch the (annoying) beep on or off. Type Optional. Declaration IO_SoundBeeper(OK:boolean); OK is true if you want the system to BEEEP when the user presses an invalid key. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks The default is true, i.e. the system will beep. Example USES CRT, FASTTTT, DOS, WINTTT, KEYTTT, IOTTT; BEGIN IO_SOUNDBEEPER(FALSE); END. IO_UserHook IOTTT NOTE This is not a procedure. IO_UserHook is declared as a pointer variable. Purpose To provide a way of intercepting the input and optionally calling a non-Toolkit procedure, i.e. a special procedure you have written. Type Optional Declaration IO_UserHook := @Procedure_Name Procedure_name is the actual name of the procedure which is to be called each time a key is pressed. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, IOTTT. Remarks The procedure must be declared as follows: {$F+} PROCEDURE_NAME(CH:CHAR; FIELDID: INTEGER; VAR RETURNSTR: STRING); BEGIN ..... {STATEMENTS} END; {$F-} The compiler directives (F and F-) designate the procedure as FAR. The Procedure_Name can be any valid procedure name, and this procedure may call other procedures. The 3 procedure parameters must be defined in the order shown. Ch will be the value of the character input by the user ,refer to appendix B for a list of the codes. Check this variable immediately and EXIT the procedure if it is not one of the special keys you are trying to intercept. FieldID will indicate the ID of the field the user is currently editing. ReturnStr is passed to the procedure with the current field value. You may update this variable to reset the current value of the field. Example See IOdem.pas on the distribution disk. ReadLine ReadTTT Purpose To provide a line input/editing facility Declaration ReadLine( X,Y,L,F,B: byte var Text: string; var Retcode: string); X is the X coord of input field (1..80) Y is the Y coord of input field (1..25) L is the length in chars of input field(1..80) F is the foreground color (0..15) B is the background color (0..7) Text is returned with the users input Retcode indicates if user Escaped. Uses CRT, FastTTT, ReadTTT. Remarks "Text" must be declared as a string variable. This variable is returned with the users input. If you want to provide the user with a default entry, set the value of Text to the desired default string, otherwise set it to null, i.e. ''. "Retcode" must be an integer variable and it is returned with the following values: 0 successful completion 1 user ESCaped Example USES CRT, FASTTTT, READTTT; VAR THEFILE: STRING; CODE : INTEGER; BEGIN THEFILE := ''; WRITEAT(10,5,WHITE,BLACK,'ENTER THE FILENAME ===>'); REPEAT READLINE(33,5,12,BLACK,LIGHTGRAY, THEFILE, CODE); UNTIL CODE = 0; END. A 12 character field is presented for the user to input a filename. If the user ESCapes, the system will re-prompt for a filename. DisplayMenu MenuTTT Purpose To display a highly formatted menu window. Declaration Displaymenu(MenuDef: menu_record; Window: boolean; var Choice,Retcode: integer); MenuDef - the name of the menu record. Window - when true indicates the screen prior to menu display should be restored after menu completion. Choice is returned with the users menu selection. The variable should be initialized to the menu pick that should be highlighted when the menu is first displayed. Retcode is returned with a value of zero if the execution was successful, or 1 if the user pressed Esc and AllowEsc was enabled. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, MenuTTT. See also Pull_menu (discussed in next chapter) Example See previous page. Pull_Menu PullTTT Purpose To display a pulldown menu. Declaration Pull_menu(M: MenuDesc; var PickM, PickS: byte); M is the MenuDesc array containing all the topics PickM is returned with the main heading selected, this is set to 0 if the user pressed Esc and PM.AllowEsc is true. PickS is returned with the sub-topic selected Uses Crt, FastTTT, DOS, WinTTT, KeyTTT, PullTTT. Remarks Modify the contents of the PM record to alter display format. The PickM and PickS variables should be initialized to the default values that should be highlighted when the menu is first displayed. If PickS is set to 0, the submenu will not be initially displayed. See also DisplayMenu (discussed in previous Chapter) Example See Major Example on page 54. PM_UserHook IOTTT NOTE This is not a procedure. PM_UserHook is declared as a pointer variable. Purpose The PM_UserHook provides a way of intercepting the input and optionally calling a non-Toolkit procedure, i.e. a special procedure you have written. Declaration PM_UserHook := @Procedure_Name Procedure_name is the actual name of the procedure which is to be called each time a key is pressed. Uses CRT, FastTTT, DOS, WinTTT, KeyTTT, PullTTT. Remarks The procedure must be declared as follows: {$F+} PROCEDURE_NAME(VAR CH:CHAR; MAIN, SUB: BYTE); BEGIN ..... {STATEMENTS} END; {$F-} The compiler directives (F and F-) designate the procedure as FAR. The Procedure_Name can be any valid procedure name, and this procedure may call other procedures. The 3 procedure parameters must be defined in the order shown. Ch will be the value of the character input by the user. Refer to appendix B for a list of the codes. Check this variable immediately and EXIT the procedure if it is not one of the special keys you are trying to intercept. Main is the number of the main menu currently selected Sub is the number of the sub-topic currently selected Example See Pulldem.pas on the distribution disk. Display_Directory DirTTT Purpose To display a Sidekick-like directory for the user to select a file. Returns a string containing the selected file. Declaration Display_Directory( var PathName: string; FileMask: string):string; PathName is a string variable containing the directory to initially display. FileMask is a string containing a DOS compatible file mask. The ? and * symbols are supported e.g. '*.pas', '???willy.*'. Remarks If the D.AllowEsc variable is enabled, then the function returns a string of #027 if the user ESCapes. There is no facility for saving/restoring the screen automatically. If necessary, use the SaveScreen and RestoreScreen procedures included in the WinTTT unit. Example USES CRT, FASTTTT, DOS, KEYTTT, WINTTT, DIRTTT; VAR F,P : STRING; BEGIN GETDIR(0,P); F := DISPLAY_DIRECTORY(P,'*.*'); END; ExtractWords StrngTTT Purpose To extract a number specified number of words from a string. Returns string; Declaration ExtractWords(S,N: byte; Str: string):string; S is number of the first word to extract N is the number of words to extract Str is the string to extract from Uses StrngTTT. Remarks If there are insufficient words to extract, the function will return as many words as possible. If there are fewer than S words in the string, the function returns a null string, i.e. ''. Example USES STRNGTTT; VAR LASTBIT : STRING; BEGIN LASTBIT := EXTRACTWORDS(4,3,'WHO THE HELL SAYS CENSORSHIP IS GOOD!'); END. The string LastBit is assigned the value 'Censorship is good!'. First StrngTTT Purpose To return the first part of a string. Returns string; Declaration First(N: byte; Str: string):string; N is the number of characters to extract. Str is the string to extract them from Uses StrngTTT. See also Last Remarks If the source string is fewer than N characters long, the whole string is returned. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := FIRST(25,'ALL GOOD THINGS WILL COME TO PASS!'); END. The string TTT is assigned the value "All good things will come". Int_to_Str StrngTTT Purpose To convert an integer to a string. Returns string; Declaration Int_to_Str(Number: longInt):string; Number can actually be byte, integer or longint Uses StrngTTT. See also Real_to_Str, Str_to_Int Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := INT_TO_STR(130); END. The value of TTT is set to '130'. Last StrngTTT Purpose To return the last part of a string. Returns string Declaration Last(N: byte; Str: string):string; N is the number of characters to extract. Str is the string to extract them from Uses StrngTTT. See also First Remarks If the source string is fewer than N characters long, the whole string is returned. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := LAST(11,'NEVER TAKE DRUGS!'); END. The string TTT is assigned the value "Take Drugs!". LastPos StrngTTT Purpose To find the last occurence of a character in a string. Returns byte; Declaration LastPos(C:char; Str:string):byte; C is the character to search for. Str is the string to search Uses StrngTTT. See also Pos (Turbo internal function) Remarks If the character is not found in the string, the function returns 0. The search is case sensitive. Example USES STRNGTTT; VAR B : BYTE; BEGIN B := LASTPOS('J','TECHNOJOCK SOFTWARE!'); END. The variable B is assigned the value 12 Lower StrngTTT Purpose To convert a string to lower case letters. Returns String; Declaration Lower(Str:string):string; Str is the string to be converted Uses StrngTTT. See also Upper, Proper. Remarks Only the upper case alphabet (A..Z) is affected. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := LOWER('LEARNING TO TYPE'); END. The string TTT is assigned the value "learning to type". OverType StrngTTT Purpose To combine two overlapping strings. Returns string; Declaration OverType(N:byte; StrS,StrT:string):string; N is the character position that the StrT (target) will be overlayed on the StrS (source). Uses StrngTTT. Remarks If N is actually larger than the length of the source string, the source string is extended with spaces ' ' i.e. no problem. Any characters after the Nth position in StrS will be replaced by the characters in StrT. If N + length(StrT) is less than the original length of StrS then the last part of StrS will remain intact. (Phew!) Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := OVERTYPE(5, 'BOB AINSBURY', 'TECHNOJOCK')); END. The string TTT is assigned the value "Bob TechnoJock". PadCenter StrngTTT Purpose Tp expand and center a string with a specific character. Returns String; Declaration PadCenter(Str:string; Size:byte; Pad:char):string; Str is the string to be expanded Size is the new string length Pad is the character to expand the string with Uses StrngTTT. See also PadLeft, PadRight Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := PADCENTER(' ASTERISKS ',20,'*'); END. The string TTT is assigned the value "***** Asterisk *****". PadLeft StrngTTT Purpose To expand and left justify a string with a specific character. Returns String; Declaration PadLeft(Str:string; Size:byte; Pad:char):string; Str is the string to be expanded Size is the new string length Pad is the character to expand the string with Uses StrngTTT. See also PadCenter, PadRight Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := PADLEFT(' ASTERISKS ',20,'*'); END. The string TTT is assigned the value " Asterisk **********". PadRight StrngTTT Purpose To expand and right justify a string with a specific character. Returns String; Declaration PadRight(Str:string; Size:byte; Pad:char):string; Str is the string to be expanded Size is the new string length Pad is the character to expand the string with Uses StrngTTT. See also PadCenter, PadLeft Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := PADRIGHT(' ASTERISKS ',20,'*'); END. The string TTT is assigned the value "********** Asterisk ". PosWord StrngTTT Purpose To determine the starting character position of a word. Returns byte; Declaration PosWord(WordNo:byte; Str:string):byte; WordNo is the number of the word to check Str is the string to be analyzed Uses StrngTTT. See also WordCnt, ExtractWords Remarks The function returns zero if the string is a null or if there are less than WordNo words in the string. Example USES STRNGTTT; VAR B : BYTE; BEGIN B := POSWORD(3,'THE QUICK BROWN LINEMAN'); END. The variable B is assigned the value 11. Proper StrngTTT Purpose To convert a string so that each word begins with an uppercase letter. Returns String; Declaration Proper(Str:string): string; Str is the string to be converted Uses StrngTTT. See also Lower, Upper. Remarks Only the alphabet (a..z) is affected. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := PROPER('R D AINSBURY'); END. The string TTT is assigned the value "R D Ainsbury". Real_to_Str StrngTTT Purpose To convert a real number to a string with a specified number of decimal places. Returns string; Declaration Real_to_Str(R:real; Dec:byte):string; R is the real number Dec is the number of decimal places for the string Uses StrngTTT. See also Str_to_Real, Int_to_Str. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := REAL_TO_STR(12345.789990,2); END. The string TTT is assigned the value "12345.79". Strip StrngTTT Purpose To remove a character from a string Returns string; Declaration Strip(L,C:char; Str:string):string; L is a character indicating which part of the string to strip the characters (see remarks) C is the character to strip Str is the string to strip Uses StrngTTT. Remarks The valid values of L are 'L' strip all leading characters 'R' strip all trailing characters 'B' strip leading and trailing characters 'A' strip all occurences of the character Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := STRIP('B',' ',' THIS IS NEAT '); END. The string TTT is assigned the value "This is neat". Str_to_Int StrngTTT Purpose To convert a string to an integer Returns integer; Declaration Str_to_Int(Str:string): integer; Str is the string to be converted Uses StrngTTT. Remarks If the string Str is null or the string cannot be successfully converted to an integer, the function returns a zero. See also Str_to_Real, Int_to_Str. Example USES STRNGTTT; VAR I : INTEGER; BEGIN I := STR_TO_INT('165'); END. The variable I is assigned the value 165. Str_to_Real StrngTTT Purpose To convert a string to an real. Returns real; Declaration Str_to_real(Str:string):real; Str is the string to be converted Uses StrngTTT. Remarks If the string Str is null, or the string cannot be successfully converted to a real , the function returns a zero. This procedure gets around the bug in Turbo 4 that occurs when trying to convert a string starting with a '.', to a number. See also Str_to_Int, Real_to_Str. Example USES STRNGTTT; VAR R : INTEGER; BEGIN R := STR_TO_REAL('165.787'); END. The variable R is assigned the value 165.787 . Upper StrngTTT Purpose To convert a string to upper case letters. Returns String; Declaration Upper(Str:string):string; Str is the string to be converted Uses StrngTTT. See also Lower, Proper. Remarks Only the alphabet (a..z) is affected. Example USES STRNGTTT; VAR TTT : STRING; BEGIN TTT := UPPER('SMALL LETTERS'); END. The string TTT is assigned the value "SMALL LETTERS". WordCnt StrnTTT Purpose To count the number of words in a string. Returns byte; Declaration WordCnt(Str:string):byte; Str is the string to be counted Uses StrngTTT. See also ExtractWords, PosWord. Example USES STRNGTTT; VAR B : BYTE; BEGIN B := WORDCNT('THATS ALL THE STRING FUNCTIONS, FOLKS!'); END. The variable B is assigned the value 6. Beep MiscTTT Purpose To give 'em a beep. Declaration Beep; Uses CRT, DOS, MiscTTT. Remarks This gives a more pleasant tone than ^G. Example USES CRT, DOS, MISCTTT; BEGIN IF ........ THEN BEEP; END. Date MiscTTT Purpose To display the system date nicely formatted Returns String; Declaration Date:string; Uses CRT, DOS, MiscTTT. See also Time Remarks The format of the returned string is the day followed by the month, day of month and year e.g. Monday February 1, 1988 Example USES CRT, FASTTTT, DOS, MISCTTT; BEGIN CLRSCR; WRITECENTER(1,YELLOW,BLACK,DATE); END. The date would be written at the top center of the screen. Exists MiscTTT Purpose To determine if a file exists Returns Boolean; Declaration Exists(Fl:string):boolean; Fl is the name of the file, including drive and path if necessary. Uses CRT, DOS, MiscTTT. Example USES CRT, DOS, MISCTTT; BEGIN IF NOT EXIST('C:\CONFIG.SYS') THEN BEEP; END. FlushKeyBuffer MiscTTT Purpose To remove all keystrokes from the keyboard buffer. Declaration FlushkeyBuffer; Remarks This procedure is most frequently used when you want to stop the type-ahead effect. Uses CRT, DOS, MiscTTT. Example USES CRT, FASTTTT, DOS, MISCTTT; VAR ANS : CHAR; BEGIN WRITEAT(1,WHEREY+1,WHITE,RED,'ARE YOU SURE YOU WANT TO DELETE IT? (Y/N); FLUSHKEYBUFFER; ANS := GETKEY; IF UPCASE(ANS) = 'Y' THEN DELRECORD; END. The keyboard is flushed in case the user had previously typed a Y in anticipation of a different question. Printer_Ready MiscTTT Purpose To indicate if the printer is connected and online. Returns boolean; Declaration Printer_Ready: boolean; Uses CRT, DOS, MiscTTT; Remarks This function is most useful when you want to bullet proof a printer option and makes sure that the printer is connected and on-line before trying to send it data. Example USES CRT, DOS, MISCTTT; BEGIN IF PRINTER_READY THEN PRINTSCREEN; END. Print_Screen MiscTTT Purpose To emulate the Print Scrn key. Declaration PrintScreen Uses CRT, DOS, MiscTTT. Example USES CRT, DOS, MISCTTT BEGIN PRINTSCREEN; END. Reset_Printer MiscTTT Purpose To clear a printer's settings back to the default. Declaration Reset_Printer; Uses CRT, DOS, MiscTTT. See also Printer_Ready. Remarks This procedure uses a unique technique that will reset most of the PC printers on the market place today. It is recommended that this procedure be called prior to sending set-up strings to a printer. Example USES CRT, DOS, MISCTTT BEGIN RESET_PRINTER; END. Time MiscTTT Purpose To display the system time nicely formatted Returns String; Declaration Time:string; Uses CRT, DOS, MiscTTT; See also Date. Remarks The format of the returned string is hour:min:sec a.m. or hour:min:sec p.m. Example USES CRT, FASTTTT, DOS, MISCTTT; BEGIN CLRSCR; WRITECENTER(1,YELLOW,BLACK,TIME); END. The time would be written at the top center of the screen.