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Example2.c
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C/C++ Source or Header
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1990-01-30
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4KB
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140 lines
/* Example2 */
/* This program will open a high resolution 16 colour Custom Screen */
/* and a normal window which is connected to it. It will display it */
/* for 30 seconds, and then close the Custom Screen and the window. */
/* If your program is using Intuition you should include intuition.h: */
#include <intuition/intuition.h>
struct IntuitionBase *IntuitionBase;
/* Declare a pointer to a Screen structure: */
struct Screen *my_screen;
/* Declare and initialize your NewScreen structure: */
struct NewScreen my_new_screen=
{
0, /* LeftEdge Should always be 0. */
0, /* TopEdge Top of the display.*/
640, /* Width We are using a high-resolution screen. */
200, /* Height Non-Interlaced NTSC (American) display. */
4, /* Depth 16 colours. */
0, /* DetailPen Text should be drawn with colour reg. 0 */
1, /* BlockPen Blocks should be drawn with colour reg. 1 */
HIRES, /* ViewModes High-resolution. (Non-Interlaced) */
CUSTOMSCREEN, /* Type Your own customized screen. */
NULL, /* Font Default font. */
"MY SCREEN", /* Title The screen' title. */
NULL, /* Gadget Must for the moment be NULL. */
NULL /* BitMap No special CustomBitMap. */
};
/* Declare a pointer to a Window structure: */
struct Window *my_window;
/* Declare and initialize your NewWindow structure: */
struct NewWindow my_new_window=
{
50, /* LeftEdge x position of the window. */
25, /* TopEdge y positio of the window. */
150, /* Width 150 pixels wide. */
100, /* Height 100 lines high. */
0, /* DetailPen Text should be drawn with colour reg. 0 */
1, /* BlockPen Blocks should be drawn with colour reg. 1 */
NULL, /* IDCMPFlags No IDCMP flags. */
SMART_REFRESH, /* Flags Intuition should refresh the window. */
NULL, /* FirstGadget No Custom Gadgets. */
NULL, /* CheckMark Use Intuition's default CheckMark (v). */
"MY WINDOW", /* Title Title of the window. */
NULL, /* Screen We will later connect it to the screen. */
NULL, /* BitMap No Custom BitMap. */
0, /* MinWidth We do not need to care about these */
0, /* MinHeight since we havent supplied the window with */
0, /* MaxWidth a Sizing Gadget. */
0, /* MaxHeight */
CUSTOMSCREEN /* Type Connected to the Workbench Screen. */
};
main()
{
/* Open the Intuition Library: */
IntuitionBase = (struct IntuitionBase *)
OpenLibrary( "intuition.library", 0 );
if( IntuitionBase == NULL )
exit(); /* Could NOT open the Intuition Library! */
/* We will now try to open the screen: */
my_screen = (struct Screen *) OpenScreen( &my_new_screen );
/* Have we opened the screen succesfully? */
if(my_screen == NULL)
{
/* Could NOT open the Screen! */
/* Close the Intuition Library since we have opened it: */
CloseLibrary( IntuitionBase );
exit();
}
/* Before we can open the window we need to give the NewWindow */
/* structure a pointer to the opened Custom Screen: */
my_new_window.Screen = my_screen;
/* We will now try to open the window: */
my_window = (struct Window *) OpenWindow( &my_new_window );
/* Have we opened the window succesfully? */
if(my_window == NULL)
{
/* Could NOT open the Window! */
/* Close the screen since we have opened it: */
CloseScreen( my_screen );
/* Close the Intuition Library since we have opened it: */
CloseLibrary( IntuitionBase );
exit();
}
/* We have opened the window, and everything seems to be OK. */
/* Wait for 30 seconds: */
Delay( 50 * 30);
/* We should always close what we have opened: */
CloseWindow( my_window );
/* Remember that all windows connected to a screen must be closed */
/* before you may close the screen! */
CloseScreen( my_screen );
/* Close the Intuition Library since we have opened it: */
CloseLibrary( IntuitionBase );
/* THE END */
}