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- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Intuition Amiga C Club */
- /* Chapter: IDCMP Tulevagen 22 */
- /* File: Example9.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 explains how to use the IDCMP flag REFRESHWINDOW, and */
- /* how to optimize the redrawing of the window. */
-
-
-
- #include <intuition/intuition.h>
-
-
-
- struct IntuitionBase *IntuitionBase;
-
-
-
- /* 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. */
- 320, /* Width 320 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 r. 1 */
- CLOSEWINDOW| /* IDCMPFlags We will recieve a message when the user */
- /* selects the Close window gad. */
-
- REFRESHWINDOW, /* We will recieve a message whenever we */
- /* need to refresh (redraw) the window. */
-
- SIMPLE_REFRESH| /* Flags Your program has to 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 gadgets connected to this window. */
- NULL, /* CheckMark Use Intuition's default CheckMark. */
- "UPDATE ME", /* Title Title of the window. */
- NULL, /* Screen Connected to the Workbench Screen. */
- NULL, /* BitMap No Custom BitMap. */
- 100, /* MinWidth We will not allow the window to become */
- 50, /* MinHeight smaller than 100 x 50, and not bigger */
- 400, /* MaxWidth than 400 x 200. */
- 200, /* MaxHeight */
- WBENCHSCREEN /* Type Connected to the Workbench Screen. */
- };
-
-
-
- /*************************************************************************/
- /* Extra information: */
- /* We will recieve a REFRESHWINDOW message whenever we need to redraw */
- /* the window's display. If the window is a SuperBitmap window you never */
- /* need to redraw it since it has its own BitMap. However, if the window */
- /* is of the type SIMPLE_REFRESH or SMART_REFRESH it can happen that */
- /* your program need to redraw the window. */
- /* SIMPLE_REFRESH: You need to update the window if it is resized, */
- /* pushed from behind to the front, or is moved. */
- /* SMART_REFRESH: You need to update the display if it is resized. */
- /* */
- /* Once you recieve the message you should redraw the window. However, */
- /* before you start to redraw you need to call the function: */
- /* BeginRefresh(), and when you have finished you should call the */
- /* function EndRefresh(). (Even if you do not redraw anything, you */
- /* should call these functions.) The functions will improve the speed of */
- /* the redrawing since only the trashed parts will be redrawed. */
- /*************************************************************************/
-
-
-
- main()
- {
- /* Boolean variable used for the while loop: */
- BOOL close_me;
-
- ULONG class; /* IDCMP flag. */
-
- /* 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. */
-
-
-
- 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 can collect messages successfully we stay in the */
- /* while-loop: */
- while(my_message = (struct IntuiMessage *) GetMsg(my_window->UserPort))
- {
- /* After we have successfully collected the message we can read */
- /* it, and save any important values which we maybe want to check */
- /* later: */
- class = my_message->Class; /* IDCMP flag. */
-
-
- /* 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 gad. */
- close_me=TRUE;
- break;
-
- case REFRESHWINDOW: /* You need to update the window. */
- printf("We need to redraw the window! (Well almost)\n");
-
- /* Start the redrawing: */
- BeginRefresh( my_window );
-
- /* Redraw the window. For example call the function */
- /* RefreshGadgets(), DrawImage(), DrawBorder() etc... */
- /* In this example we do not redraw anything (there does */
- /* not exist anything to redraw). However, even if you do */
- /* nothing you need to call the functions BeginRefresh() */
- /* and EndRefresh(). */
-
- /* End the redrawing: */
- EndRefresh( my_window );
- break;
- }
- }
- }
-
-
-
- /* Close the window: */
- CloseWindow( my_window );
-
-
-
- /* Close the Intuition Library: */
- CloseLibrary( IntuitionBase );
-
- /* THE END */
- }
-