home *** CD-ROM | disk | FTP | other *** search
- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Intuition Amiga C Club */
- /* Chapter: Gadgets 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 program will open a normal window which is connected to the */
- /* Workbench Screen. The window will use all System Gadgets, and will */
- /* close first when the user has selected the System gadget Close */
- /* window. Inside the window we have put a Proportional gadget which */
- /* uses a custom image knob. */
-
-
-
- #include <intuition/intuition.h>
-
-
-
- struct IntuitionBase *IntuitionBase;
-
-
-
- /* THE PROPORTIONAL GADGET's STRUCTURES: */
-
- /* The IntuiText structure: */
- struct IntuiText my_text=
- {
- 1, /* FrontPen, colour register 1. */
- 0, /* BackPen, colour register 0. */
- JAM1, /* DrawMode, draw the characters with colour 1, do not */
- /* change the background. */
- -65, 8, /* LeftEdge, TopEdge. */
- NULL, /* ITextFont, use default font. */
- "Volume:", /* IText, the text that will be printed. */
- NULL, /* NextText, no other IntuiText structures. */
- };
-
-
- /* Image data for the knob: */
- /* Remember that Image data must ALWAYS be in chip memory! */
- USHORT chip my_knob_data[80]=
- {
- 0x01E0,0x0000, /* Bitplane ZERO */
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x07F8,0x0000,
- 0x7BF7,0x8000,
- 0x83F0,0x4000,
- 0x83F0,0x4000,
- 0x7BF7,0x8000,
- 0x07F8,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x03F0,0x0000,
- 0x01E0,0x0000,
-
- 0x0000,0x0000, /* Bitplane ONE */
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x05E8,0x0000,
- 0x7DEF,0x8000,
- 0x7DEF,0x8000,
- 0x05E8,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x01E0,0x0000,
- 0x0000,0x0000
- };
-
- /* The Image structure for the knob: */
- struct Image my_knob=
- {
- 0, 0, /* LeftEdge, TopEdge */
- 18, 20, /* Width, Height */
- 2, /* Depth */
- my_knob_data, /* ImageData */
- 0x03, 0x00, /* PlanePick, PlaneOnOff */
- NULL /* NextImage */
- };
-
-
- struct PropInfo my_prop_info=
- {
- FREEHORIZ, /* Flags, the knob should be moved horizontally. */
- 0, /* HorizPot, start position of the knob. */
- 0, /* VertPot, 0 since we will not move the knob hor. */
- MAXBODY * 1/64, /* HorizBody, 64 steps. */
- 0, /* VertBody, 0 since we will not move the knob hor. */
-
- /* These variables are initialized and maintained by Intuition: */
-
- 0, /* CWidth */
- 0, /* CHeight */
- 0, 0, /* HPotRes, VPotRes */
- 0, /* LeftBorder */
- 0 /* TopBorder */
- };
-
-
- struct Gadget my_gadget=
- {
- NULL, /* NextGadget, no more gadgets in the list. */
- 80, /* LeftEdge, 80 pixels out. */
- 30, /* TopEdge, 30 lines down. */
- 200, /* Width, 200 pixels wide. */
- 24, /* Height, 24 pixels lines heigh. */
- GADGHNONE, /* Flags, no highlightning. */
- GADGIMMEDIATE| /* Activation, our program will recieve a message */
- RELVERIFY, /* when the user has selected this gadget, and when */
- /* the user has released it. */
- PROPGADGET, /* GadgetType, a Proportional gadget. */
- (APTR) &my_knob, /* GadgetRender, a pointer to our knob Image str. */
- NULL, /* SelectRender, NULL since we do not supply the */
- /* gadget with an alternative image. */
- &my_text, /* GadgetText, volume. */
- NULL, /* MutualExclude, no mutual exclude. */
- (APTR) &my_prop_info, /* SpecialInfo, pointer to a PropInfo structure. */
- 0, /* GadgetID, no id. */
- NULL /* UserData, no user data connected to the gadget. */
- };
-
-
-
- /* 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 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. */
- &my_gadget, /* FirstGadget A pointer to the String gadget. */
- NULL, /* CheckMark Use Intuition's default CheckMark. */
- "Proportional Window", /* Title Title of the window. */
- NULL, /* Screen Connected to the Workbench Screen. */
- NULL, /* BitMap No Custom BitMap. */
- 320, /* MinWidth We will not allow the window to become */
- 60, /* MinHeight smaller than 320 x 60, and not bigger */
- 640, /* MaxWidth than 640 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;
-
- /* 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. */
-
-
-
- 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 );
-
- /* We have now recieved one or more messages. */
-
- /* Since we may recieve several messages we stay in the while loop */
- /* and collect, save, reply and execute the messages until there is */
- /* a pause: */
- while(my_message=(struct IntuiMessage *)GetMsg( my_window->UserPort))
- {
- /* GetMsg will return a pointer to a message if there was one, */
- /* else it returns NULL. We will therefore stay in this while loop */
- /* as long as there are some messages waiting in the port. */
-
- /* 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; /* Save the 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 gadget! */
- close_me=TRUE;
- break;
-
- case GADGETDOWN: /* The user has selected the Prop. gadget: */
- printf("Proportional gadget selected.\n");
- break;
-
- case GADGETUP: /* The user has released the Prop. gadget: */
- printf("Proportional gadget released.\n");
- break;
- }
- }
- printf("Volume= %1.0f\n\n", (float) my_prop_info.HorizPot/MAXPOT*64);
- }
-
- /* We should always close the windows we have opened before we leave: */
- CloseWindow( my_window );
-
-
-
- /* Close the Intuition Library since we have opened it: */
- CloseLibrary( IntuitionBase );
-
- /* THE END */
- }
-
- /*************************************************************************/
- /* EXTRA INFORMATION: */
- /* We will recieve a message (GADGETDOWN) when the user selects the */
- /* knob, and one message (GADGETUP) when the user releases the knob. If */
- /* the user on the other hand clicks inside the container (not on the */
- /* knob) we will recieve both a GADGETDOWN and a GADGETUP message at the */
- /* same time. */
- /* It is because of that we need to have a while loop which collects the */
- /* messages once one or more has arrived. We can not as before just wait */
- /* and then collect one message, since there may be more in the queue. */
- /*************************************************************************/
-