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example10.c
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1995-02-27
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17KB
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470 lines
/***********************************************************/
/* */
/* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
/* ------------------------------- ------------------ */
/* */
/* Book: ACM Intuition Amiga C Club */
/* Chapter: Requesters Tulevagen 22 */
/* File: Example10.c 181 41 LIDINGO */
/* Author: Anders Bjerin SWEDEN */
/* Date: 92-05-01 */
/* Version: 1.10 */
/* */
/* Copyright 1992, Anders Bjerin - Amiga C Club (ACC) */
/* */
/* Registered members may use this program freely in their */
/* own commercial/noncommercial programs/articles. */
/* */
/***********************************************************/
/* This example demonstrates how you use a requester with a */
/* predrawn bitmap. This is very useful when you want */
/* colourful and eye catching requesters. The advantage */
/* with a special bitmap is that if the window which the */
/* requester is tied to is resized, the drawing will not be */
/* destroied. */
/* */
/* The graphics data is stored in a separate file called */
/* "Example10Graphics.c". Both this and the graphical file */
/* should be compiled separately, then linked together. If */
/* you have a SAS (Lattice) C Compiler you would do like */
/* this: */
/* lc Example10.c */
/* lc Example10Graphics.c */
/* blink with Example10.lnk */
/* */
/* This program will NOT try to erase the disk! It is ony a */
/* demonstration how to use a requester. */
#include <intuition/intuition.h>
/* The size of the requester: */
#define WIDTH 310
#define HEIGHT 180
#define DEPTH 4
#define COLOURS 16
struct IntuitionBase *IntuitionBase;
struct GfxBase *GfxBase;
/* The graphics for the requester: */
extern UWORD chip YesNoData[];
/* The sixteen colours: (RGB) */
UWORD colour[COLOURS]=
{
0x000, 0xFFF, 0x500, 0x900, 0xE00, 0xE60, 0xFE0, 0x06F,
0x0AF, 0x04C, 0x666, 0x888, 0xBBB, 0x555, 0x028, 0x0CF
};
/* The YesNo image structure: */
struct Image YesNoImage=
{
0, 0, /* LeftEdge, TopEdge */
285, 154, DEPTH, /* Width, Height, Depth */
YesNoData, /* ImageData */
0x0F, 0x00, /* PlanePick, PlaneOnOff */
NULL /* NextImage */
};
/* The BitMap structure: */
struct BitMap my_bitmap;
/* The RastPort: */
struct RastPort my_rast_port;
/* The YES gadget (the left one): */
struct Gadget yes_gadget=
{
NULL, /* NextGadget, no more gadgets in the list. */
44, /* LeftEdge, 44 pixels out. */
108, /* TopEdge, 108 lines down. */
80, /* Width, 80 pixels wide. */
30, /* Height, 30 pixels lines heigh. */
GADGHCOMP, /* Flags, when this gadget is highlighted, the gadget */
/* will be rendered in the complement colours. */
GADGIMMEDIATE| /* Activation, our program will recieve a message when */
RELVERIFY| /* the user has selected this gadget, and when the user */
/* has released it. */
ENDGADGET, /* When the user has selected this gadget, the */
/* requester is satisfied, and is deactivated. */
/* IMPORTANT! At least one gadget per requester */
/* must have the flag ENDGADGET set. If not, the */
/* requester would never be deactivated! */
BOOLGADGET| /* GadgetType, a Boolean gadget which is connected to */
REQGADGET, /* a requester. IMPORTANT! Every gadget which is */
/* connectd to a requester must have the REQGADGET flsg */
/* set in the GadgetType field. */
NULL, /* GadgetRender, no rendering. */
NULL, /* SelectRender, no alternative rendering. */
NULL, /* GadgetText, no text. */
NULL, /* MutualExclude, no mutual exclude. */
NULL, /* SpecialInfo, NULL since this is a Boolean gadget. */
/* (It is not a Proportional/String or Integer gdget) */
0, /* GadgetID, no id. */
NULL /* UserData, no user data connected to the gadget. */
};
/* The NO gadget (the right one): */
struct Gadget no_gadget=
{
&yes_gadget, /* NextGadget, pointer to the yes gadget. */
200, /* LeftEdge, 200 pixels out. */
108, /* TopEdge, 108 lines down. */
75, /* Width, 75 pixels wide. */
30, /* Height, 30 pixels lines heigh. */
GADGHCOMP, /* Flags, when this gadget is highlighted, the gadget */
/* will be rendered in the complement colours. */
GADGIMMEDIATE| /* Activation, our program will recieve a message when */
RELVERIFY, /* the user has selected this gadget, and when the user */
/* has released it. */
BOOLGADGET| /* GadgetType, a Boolean gadget which is connected to */
REQGADGET, /* a requester. IMPORTANT! Every gadget which is */
/* connectd to a requester must have the REQGADGET flsg */
/* set in the GadgetType field. */
NULL, /* GadgetRender, no rendering. */
NULL, /* SelectRender, no alternative rendering. */
NULL, /* GadgetText, no text. */
NULL, /* MutualExclude, no mutual exclude. */
NULL, /* SpecialInfo, NULL since this is a Boolean gadget. */
/* (It is not a Proportional/String or Integer gdget) */
0, /* GadgetID, no id. */
NULL /* UserData, no user data connected to the gadget. */
};
/***********************************************************************/
/* Important notice: */
/* Remember that every gadget which is connected to a requester must */
/* have the flag REQGADGET set in the GadgetType field. Remember also */
/* that at least one gadget per requester must have the ENDGADGET flag */
/* set in the Activation field. */
/***********************************************************************/
/* The request structure: */
struct Requester my_requester=
{
NULL, /* OlderRequester, used by Intuition. */
5, 15, /* LeftEdge, TopEdge, 0 pixels out, 0 lines down. */
WIDTH, HEIGHT, /* Width, Height, 285 pixels wide, 154 lines high. */
0, 0, /* RelLeft, RelTop, Since POINTREL flag is not set, */
/* Intuition ignores these values. */
&no_gadget, /* ReqGadget, pointer to the first gadget. */
NULL, /* ReqBorder, no rendering. */
NULL, /* ReqText, no text. */
PREDRAWN, /* Flags, we use our own predrawn BitMap. */
0, /* BackFill, no backfill. */
NULL, /* ReqLayer, used by Intuition. Set to NULL. */
NULL, /* ReqPad1, used by Intuition. Set to NULL. */
NULL, /* ImageBMap, will later be changed. */
NULL, /* RWindow, used by Intuition. Set to NULL. */
NULL /* ReqPad2, used by Intuition. Set to NULL. */
};
/* A pinter to a Screen structure: */
struct Screen *my_screen;
/* The NewScreen structure: */
struct NewScreen my_new_screen=
{
0, /* LeftEdge Should always be 0. */
0, /* TopEdge Top of the display.*/
320, /* Width We are using a high-resolution screen. */
200, /* Height Non-Interlaced NTSC (American) display. */
DEPTH, /* Depth 4 - 16 colours. */
0, /* DetailPen Text should be drawn with colour reg. 0 */
1, /* BlockPen Blocks should be drawn with colour reg. 1 */
NULL, /* ViewModes Low-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. */
};
/* A pointer to a Window structure: */
struct Window *my_window;
/* The NewWindow structure: */
struct NewWindow my_new_window=
{
0, /* LeftEdge x position of the window. */
0, /* TopEdge y positio of the window. */
320, /* Width 320 pixels wide. */
200, /* Height 200 lines high. */
0, /* DetailPen Text should be drawn with colour reg. 0 */
1, /* BlockPen Blocks should be drawn with colour reg. 1 */
CLOSEWINDOW| /* IDCMPFlags The window will give us a message if the */
/* user has selected the Close window gad, */
GADGETDOWN| /* or a gadget has been pressed on, or */
GADGETUP, /* a gadge has been released. */
SMART_REFRESH| /* Flags Intuition should refresh the window. */
WINDOWCLOSE| /* Close Gadget. */
WINDOWDRAG| /* Drag gadget. */
WINDOWDEPTH| /* Depth arrange Gadgets. */
WINDOWSIZING| /* Sizing Gadget. */
ACTIVATE, /* The window should be Active when opened. */
NULL, /* FirstGadget No gadget connected to this window. */
NULL, /* CheckMark Use Intuition's default CheckMark. */
"The Window", /* Title Title of the window. */
NULL, /* Screen Connected to the Workbench Screen. */
NULL, /* BitMap No Custom BitMap. */
140, /* MinWidth We will not allow the window to become */
50, /* MinHeight smaller than 140 x 50, and not bigger */
300, /* MaxWidth than 300 x 200. */
200, /* MaxHeight */
CUSTOMSCREEN /* Type Connected to a Custom Screen. */
};
/* Declare our functions: */
void main();
void clean_up( STRPTR message );
void main()
{
/* Boolean variable used for the while loop: */
BOOL close_me;
/* Declare a variable in which we will store the IDCMP flag: */
ULONG class;
/* Declare a pointer to an IntuiMessage structure: */
struct IntuiMessage *my_message;
/* We use this variable to check if the requester has ben activated */
/* or not: */
BOOL result;
/* Used in the loops: */
int loop;
/* Before we can use Intuition we need to open the Intuition Library: */
IntuitionBase = (struct IntuitionBase *)
OpenLibrary( "intuition.library", 0 );
if( IntuitionBase == NULL )
clean_up( "Could NOT open the Intuition Library!" );
/* Before we can use the function AllocRaster() etc we need to open */
/* the graphics Library: */
GfxBase = (struct GfxBase *)
OpenLibrary( "graphics.library", 0);
if( GfxBase == NULL )
clean_up( "Could NOT open the Graphics Library!" );
/* Initialize the BitMap by calling the function: */
InitBitMap( &my_bitmap, DEPTH, WIDTH, HEIGHT );
/* &my_bitmap: A pointer to the my_bitmap structure. */
/* DEPTH: Number of bitplanes to use. */
/* WIDTH: The width of the BitMap. */
/* HEIGHT: The height of the BitMap. */
/* Allocate display memory for the BitMap: */
for( loop=0; loop < DEPTH; loop++)
{
if((my_bitmap.Planes[loop] = (PLANEPTR)
AllocRaster( WIDTH, HEIGHT )) == NULL )
clean_up( "Not enough memory for the BitMap!" );
/* Clear the Bitplane: */
BltClear( my_bitmap.Planes[loop], RASSIZE( WIDTH, HEIGHT ), 0);
}
/* Initialize the RastPort structure: */
InitRastPort( &my_rast_port );
/* Tie the bitmap to the rastport: */
my_rast_port.BitMap = &my_bitmap;
/* Set the front pen to colour 13: */
SetAPen( &my_rast_port, 13 );
/* Fill the request: */
RectFill( &my_rast_port, 0, 0, WIDTH-1, HEIGHT-1 );
/* Draw the image into our own bitmap: */
DrawImage( &my_rast_port, &YesNoImage, 10, 8 );
/* Give our requester a pointer to our prepared bitmap: */
my_requester.ImageBMap = &my_bitmap;
/* 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)
clean_up( "Could not open the Screen!" );
/* Change colour registers: */
for( loop = 0; loop < COLOURS; loop++ )
SetRGB4( &my_screen->ViewPort, loop,
(colour[ loop ] & 0xF00) >> 8, /* Red */
(colour[ loop ] & 0x0F0) >> 4, /* Green */
(colour[ loop ] & 0x00F) /* Blue */
);
/* 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)
clean_up( "Could not open the window!" );
/* We will now try to activate the requester: */
result=Request( &my_requester, my_window );
if( !result ) /* !result is the same thing as result==FALSE */
{
/* Intuition could not activate the requester! */
/* In this case we do not need to quit since it does not matter if */
/* the requester was activated or not. I just wanted to show how */
/* you can check if you have successfully opened requester or not. */
printf("Could not activate the requester!\n");
}
else
close_me = FALSE;
/* Stay in the while loop until the user has selected the Close window */
/* gadget. However, in this example the user first need to deactivate */
/* the requester before he can select the Close window gadget: */
while( !close_me )
{
/* Wait until we have recieved a message: */
Wait( 1 << my_window->UserPort->mp_SigBit );
/* As long as we collect messages sucessfully: */
while(my_message=(struct IntuiMessage *) GetMsg(my_window->UserPort))
{
/* After we have collected the message we can read it, and save any */
/* important values which we maybe want to check later: */
class = my_message->Class;
/* After we have read it we reply as fast as possible: */
/* REMEMBER! Do never try to read a message after you have replied! */
/* Some other process has maybe changed it. */
ReplyMsg( my_message );
/* Check which IDCMP flag was sent: */
switch( class )
{
case CLOSEWINDOW: /* The user selected the Close window gadget! */
/* It is first when the requester has been satisfied, the */
/* user can close the window. Remember, do never close a */
/* window if there are any active requester in it. */
close_me=TRUE;
break;
case GADGETDOWN: /* The user has pressed on a gadget. */
/* Since there exist only one "nomal" gadget, we do not */
/* need to check which gadget was selected. */
printf("Down\n");
break;
case GADGETUP: /* The user has released a gadget. */
/* Since there exist only one "nomal" gadget, we do not */
/* need to check which gadget was released. */
printf("Up\n");
/* Once the user releases this gadget the requester will */
/* be satisfied and deactivated. The user can from now on */
/* select the Close window gadget. */
printf("Requester satisfied!\n");
printf("You may now close the window!\n");
break;
}
}
}
/* Clean up and quit: */
clean_up( "THE END" );
}
void clean_up( STRPTR message )
{
int loop;
/* Close the window: */
if( my_window )
CloseWindow( my_window );
/* Close the screen: */
if( my_screen )
CloseScreen( my_screen );
/* Deallocate the display memory, Bitplan by Bitplan. */
for( loop=0; loop < DEPTH; loop++)
if( my_bitmap.Planes[loop] ) /* Deallocate this Bitplan? */
FreeRaster( my_bitmap.Planes[loop], WIDTH, HEIGHT );
/* Close the Graphics Library: */
if( GfxBase )
CloseLibrary( GfxBase );
/* Close the Intuition Library since we have opened it: */
if( IntuitionBase )
CloseLibrary( IntuitionBase );
/* Tell the user what has happened: */
printf( "%s\n", message );
/* Quit: */
exit( 0 );
}