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AMIGA C MANUAL_v2.00
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CMAN2.LZH
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Menus
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Example4.c
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C/C++ Source or Header
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1990-01-30
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12KB
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320 lines
/* Example4 */
/* This program opens a normal window to which we connect a menu strip. */
/* The menu will look like this: */
/* */
/* Status */
/* -------------- */
/* | v Readmode | (ghosted) */
/* | Editmode | */
/* -------------- */
/* */
/* The Readmode item is selected and ghosted, and when the user selects */
/* the Editmode item, it will become disabled (ghosted) while the read- */
/* mode item will be enabled (not ghosted). This means that if the */
/* program is in "readmode", the user should only be able to chose the */
/* "editmode", and v.v. */
/* */
/* The purpose with this program is to show how you can use the OnMenu */
/* and OffMenu functions inorder to make an "user-friendly interface". */
#include <intuition/intuition.h>
struct IntuitionBase *IntuitionBase;
/*************************************************************************/
/* E D I T M O D E I T E M */
/*************************************************************************/
/* The text for the editmode item: */
struct IntuiText my_editmode_text=
{
2, /* FrontPen, black. */
0, /* BackPen, not used since JAM1. */
JAM1, /* DrawMode, do not change the background. */
CHECKWIDTH, /* LeftEdge, CHECKWIDTH amount of pixels out. */
/* This will leave enough space for the check mark. */
1, /* TopEdge, 1 line down. */
NULL, /* TextAttr, default font. */
"Editmode", /* IText, the string. */
NULL /* NextItem, no link to other IntuiText structures. */
};
/* The MenuItem structure for the editmode item: */
struct MenuItem my_editmode_item=
{
NULL, /* NextItem, last item in the list. */
0, /* LeftEdge, 0 pixels out. */
10, /* TopEdge, 10 lines down. */
150, /* Width, 150 pixels wide. */
10, /* Height, 10 lines high. */
ITEMTEXT| /* Flags, render this item with text. */
ITEMENABLED| /* this item will be enabled. */
CHECKIT| /* it is an attribute item. */
HIGHCOMP, /* complement the colours when highlihted. */
0xFFFFFFFD, /* MutualExclude, mutualexclude all items except the */
/* second (this) one. */
(APTR) &my_editmode_text, /* ItemFill, pointer to the text. */
NULL, /* SelectFill, nothing since we complement the col. */
0, /* Command, not accessable from the keyboard. */
NULL, /* SubItem, ignored by Intuition. */
MENUNULL, /* NextSelect, no items selected. */
};
/*************************************************************************/
/* R E A D M O D E I T E M */
/*************************************************************************/
/* The text for the readmode item: */
struct IntuiText my_readmode_text=
{
2, /* FrontPen, black. */
0, /* BackPen, not used since JAM1. */
JAM1, /* DrawMode, do not change the background. */
CHECKWIDTH, /* LeftEdge, CHECKWIDTH amount of pixels out. */
/* This will leave enough space for the check mark. */
1, /* TopEdge, 1 line down. */
NULL, /* TextAttr, default font. */
"Readmode", /* IText, the string. */
NULL /* NextItem, no link to other IntuiText structures. */
};
/* The MenuItem structure for the readmode item: */
struct MenuItem my_readmode_item=
{
&my_editmode_item, /* NextItem, pointer to the second (edit) item. */
0, /* LeftEdge, 0 pixels out. */
0, /* TopEdge, 0 lines down. */
150, /* Width, 150 pixels wide. */
10, /* Height, 10 lines high. */
ITEMTEXT| /* Flags, render this item with text. */
/* this item will be disabled. */
CHECKIT| /* it is an attribute item. */
CHECKED| /* this item is initially selected. */
HIGHCOMP, /* complement the colours when highlihted. */
0xFFFFFFFE, /* MutualExclude, mutualexclude all items except the */
/* first (this) one. */
(APTR) &my_readmode_text, /* ItemFill, pointer to the text. */
NULL, /* SelectFill, nothing since we complement the col. */
0, /* Command, not accessable from the keyboard. */
NULL, /* SubItem, ignored by Intuition. */
MENUNULL, /* NextSelect, no items selected. */
};
/*************************************************************************/
/* M E N U */
/*************************************************************************/
/* The Menu structure for the first (and only) menu: */
struct Menu my_menu=
{
NULL, /* NextMenu, no more menu structures. */
0, /* LeftEdge, left corner. */
0, /* TopEdge, for the moment ignored by Intuition. */
50, /* Width, 50 pixels wide. */
0, /* Height, for the moment ignored by Intuition. */
MENUENABLED, /* Flags, this menu will be enabled. */
"Status", /* MenuName, the string. */
&my_readmode_item /* FirstItem, pointer to the first item in the list. */
};
/* 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. */
250, /* Width 250 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 */
CLOSEWINDOW| /* IDCMPFlags The window will give us a message if the */
/* user has selected the Close window gad. */
MENUPICK,
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 Custom gadgets. */
NULL, /* CheckMark Use Intuition's default CheckMark. */
"Read or Edit", /* Title Title of the window. */
NULL, /* Screen Connected to the Workbench Screen. */
NULL, /* BitMap No Custom BitMap. */
80, /* MinWidth We will not allow the window to become */
30, /* MinHeight smaller than 80 x 30, and not bigger */
300, /* MaxWidth than 300 x 200. */
200, /* MaxHeight */
WBENCHSCREEN /* Type Connected to the Workbench Screen. */
};
main()
{
/* Boolean variable used for the while loop: */
BOOL close_me;
/* Declare a variable in which we will store the IDCMP flag: */
ULONG class;
/* If we recieve a MENUPICK event, the Code field of the message */
/* structure will contain the menu number of the first selected item. */
/* Declare a variable to store the Code value in, and two extra menu */
/* number variables: */
USHORT code, menu_number, number;
/* Declare a MenuItem pointer: */
struct MenuItem *item;
/* Declare a pointer to an IntuiMessage structure: */
struct IntuiMessage *my_message;
/* Before we can use Intuition we need to 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 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 Intuition Library since we have opened it: */
CloseLibrary( IntuitionBase );
exit();
}
/* We have opened the window, and everything seems to be OK. */
SetMenuStrip( my_window, &my_menu );
printf("Menustrip connected to window!\n");
close_me = FALSE;
/* Stay in the while loop until the user has selected the Close window */
/* gadget: */
while( close_me == FALSE )
{
/* Wait until we have recieved a message: */
Wait( 1 << my_window->UserPort->mp_SigBit );
/* As long as we collect messages sucessfully we stay in the loop: */
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;
code = my_message->Code;
/* 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: */
if( class == CLOSEWINDOW )
close_me=TRUE; /* The user selected the Close window gadget! */
if(class == MENUPICK)
{
printf("\nMenu pick!\n");
menu_number = code;
while( menu_number != MENUNULL )
{
/* Get the address of the item: */
item = (struct MenuItem *) ItemAddress( &my_menu, menu_number );
/* Check which item was selected: */
if( item == &my_readmode_item )
{
/* The Readmode (first) item was selected! */
printf("We are now in READMODE!\n");
/* Disable the Readmode item: */
number = SHIFTMENU( 0 ) + SHIFTITEM( 0 ) + SHIFTSUB( NOSUB );
/* first menu first item no subitem. */
OffMenu( my_window, number );
/* Enable the Editmode item: */
number = SHIFTMENU( 0 ) + SHIFTITEM( 1 ) + SHIFTSUB( NOSUB );
/* first menu second item no subitem. */
OnMenu( my_window, number );
}
if( item == &my_editmode_item )
{
/* The Editmode (second) item was selected! */
printf("We are now in EDITMODE!\n");
/* Disable the Editmode item: */
number = SHIFTMENU( 0 ) + SHIFTITEM( 1 ) + SHIFTSUB( NOSUB );
/* first menu second item no subitem. */
OffMenu( my_window, number );
/* Enable the Readmode item: */
number = SHIFTMENU( 0 ) + SHIFTITEM( 0 ) + SHIFTSUB( NOSUB );
/* first menu first item no subitem. */
OnMenu( my_window, number );
}
/* Get the following item's menu number: */
menu_number = item->NextSelect;
}
}
}
}
printf("Menustrip removed from window!\n");
ClearMenuStrip( my_window );
/* Close the window: */
CloseWindow( my_window );
/* Close the Intuition Library since we have opened it: */
CloseLibrary( IntuitionBase );
/* THE END */
}