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Text File | 1994-11-25 | 5.7 KB | 212 lines | [TEXT/MMCC] |
- /*------------------------------------------------------------------------------
- #
- # Macintosh Developer Technical Support
- #
- # Simple Color QuickDraw Sample Application
- #
- # SillyBalls
- #
- # SillyBalls.c - C Source
- #
- # Copyright © 1988 Apple Computer, Inc.
- # All rights reserved.
- #
- # Versions: 1.0 8/88
- #
- # Components: SillyBalls.c August 1, 1988
- # SillyBalls.make August 1, 1988
- #
- # This is a very simple sample program that demonstrates how to use Color
- # QuickDraw. It is about two pages of code, and does nothing more than open
- # a color window and draw randomly colored ovals in the window.
- #
- # The purpose is to show how to get some initial results with Color QuickDraw.
- # It is a complete program and is very short to be as clear as possible.
- #
- # It does not have an Event Loop. It is not fully functional in the sense that
- # it does not do all the things you would expect a well behaved Macintosh
- # program to do, like size the window naturally, have an event loop, use menus,
- # etc.
- #
- # See Sample and TESample for the general structure and MultiFinder techniques that
- # we recommend that you use when building a new application.
- #
- ------------------------------------------------------------------------------*/
-
-
- // Version 1.0: 6/2/88
- // 7/20/88 DJB Converted to C
- //
- // purpose To demonstrate a simple color App using Color QuickDraw.
- // It draws colored balls in a color window, then uses colored
- // text inverted in the ball. The ball location and color is Random.
- //
- // This program was written by Bo3b Johnson, 1/88.
- //
- // The inverted Bob text was a Skippy Blair special concept,
- // kept for obvious aesthetic reasons.
-
- //MW -cut out some other program descriptions.-
-
- //MW ** Metrowerks note **
- // All changed code by Metrowerks is commented by "//MW".
- // There is one type of modification to the original source:
- // • Added argument type and return type to function definitions.
- // In order to pass with extended error checking on.
- //
- // 8/31/93 JA
-
-
- #include <Types.h>
- #include <Memory.h>
- #include <Quickdraw.h>
- #include <Fonts.h>
- #include <Events.h>
- #include <Menus.h>
- #include <Windows.h>
- #include <TextEdit.h>
- #include <Dialogs.h>
- #include <OSUtils.h>
- #include <ToolUtils.h>
- #include <SegLoad.h>
-
- /* Constants */
- #define BallWidth 20
- #define BallHeight 20
- #define BobSize 8 /* Size of text in each ball */
-
- /* Globals */
- Rect windRect;
-
- /* Prototypes */
- void Initialize(void);
- void NewBall(void);
-
- //
- // Main body of program SillyBalls
- //
-
- //MW specified argument and return type.
- void main(void)
- {
- Initialize();
-
- do {
- NewBall();
- } while (!Button());
-
- }
-
- //
- // Initialize everything for the program, make sure we can run
- //
-
- //MW specified argument and return type.
- void Initialize(void)
- {
- WindowPtr mainPtr;
- OSErr error;
- SysEnvRec theWorld;
-
- //
- // Test the computer to be sure we can do color.
- // If not we would crash, which would be bad.
- // If we can’t run, just beep and exit.
- //
-
- error = SysEnvirons(1, &theWorld);
- if (theWorld.hasColorQD == false) {
- SysBeep(50);
- ExitToShell(); /* If no color QD, we must leave. */
- }
-
- /* Initialize all the needed managers. */
- InitGraf(&qd.thePort);
- InitFonts();
- InitWindows();
- InitMenus();
- TEInit();
- InitDialogs(nil);
- InitCursor();
-
- //
- // To make the Random sequences truly random, we need to make the seed start
- // at a different number. An easy way to do this is to put the current time
- // and date into the seed. Since it is always incrementing the starting seed
- // will always be different. Don’t for each call of Random, or the sequence
- // will no longer be random. Only needed once, here in the init.
- //
- GetDateTime((unsigned long*) &qd.randSeed);
-
- //
- // Make a new window for drawing in, and it must be a color window.
- // The window is full screen size, made smaller to make it more visible.
- //
- windRect = qd.screenBits.bounds;
- InsetRect(&windRect, 50, 50);
- mainPtr = NewCWindow(nil, &windRect, "\pBob Land", true, documentProc,
- (WindowPtr) -1, false, 0);
-
- SetPort(mainPtr); /* set window to current graf port */
- TextSize(BobSize); /* smaller font for drawing. */
- }
-
-
- //
- // NewBall: make another ball in the window at a random location and color.
- //
-
- //MW -specified argument and return type.-
- void NewBall(void)
- {
- RGBColor ballColor;
- Rect ballRect;
- long int newLeft,
- newTop;
-
- //
- // Make a random new color for the ball.
- //
- ballColor.red = Random();
- ballColor.green = Random();
- ballColor.blue = Random();
-
- //
- // Set that color as the new color to use in drawing.
- //
- RGBForeColor (&ballColor);
-
- //
- // Make a Random new location for the ball, that is normalized to the window size.
- // This makes the Integer from Random into a number that is 0..windRect.bottom
- // and 0..windRect.right. They are normalized so that we don't spend most of our
- // time drawing in places outside of the window.
- //
- newTop = Random(); newLeft = Random();
- newTop = ((newTop+32767) * windRect.bottom)/65536;
- newLeft = ((newLeft+32767) * windRect.right)/65536;
- SetRect(&ballRect, newLeft, newTop, newLeft+BallWidth, newTop+BallHeight);
-
- //
- // Move pen to the new location, and paint the colored ball.
- //
- MoveTo(newLeft, newTop);
- PaintOval (&ballRect);
-
- //
- // Move the pen to the middle of the new ball position, for the text
- //
- MoveTo(ballRect.left + BallWidth/2 - BobSize,
- ballRect.top + BallHeight/2 + BobSize/2 -1);
-
- //
- // Invert the color and draw the text there. This won’t look quite right in 1 bit
- // mode, since the foreground and background colors will be the same.
- // Color QuickDraw special cases this to not invert the color, to avoid
- // invisible drawing.
- //
- InvertColor(&ballColor);
- RGBForeColor(&ballColor);
- DrawString("\pBob");
- }
-