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- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Intuition Amiga C Club */
- /* Chapter: Menus Tulevagen 22 */
- /* File: Example4.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 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 */
- }
-