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85 lines
3.1 KiB
Markdown
85 lines
3.1 KiB
Markdown
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[← Home](../README.md) · [Intuition](README.md)
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# IDCMP — IntuiMessage Classes
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## Overview
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**IDCMP** (Intuition Direct Communication Message Ports) is the mechanism by which Intuition delivers input events to windows. Each window has a `UserPort` (MsgPort) where `IntuiMessage` structures are queued.
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---
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## struct IntuiMessage
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```c
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/* intuition/intuition.h — NDK39 */
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struct IntuiMessage {
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struct Message ExecMessage;
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ULONG Class; /* IDCMP_* class */
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UWORD Code; /* class-specific code */
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UWORD Qualifier; /* key/mouse qualifiers */
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APTR IAddress; /* class-specific address (e.g. gadget) */
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WORD MouseX; /* mouse X relative to window */
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WORD MouseY; /* mouse Y relative to window */
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ULONG Seconds; /* timestamp seconds */
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ULONG Micros; /* timestamp microseconds */
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struct Window *IDCMPWindow; /* window that received this */
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struct IntuiMessage *SpecialLink;
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};
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```
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---
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## IDCMP Class Constants
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| Constant | Hex | Description |
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|---|---|---|
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| `IDCMP_SIZEVERIFY` | `$0001` | Window is about to be resized |
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| `IDCMP_NEWSIZE` | `$0002` | Window was resized |
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| `IDCMP_REFRESHWINDOW` | `$0004` | Window needs refresh |
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| `IDCMP_MOUSEBUTTONS` | `$0008` | Mouse button pressed/released |
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| `IDCMP_MOUSEMOVE` | `$0010` | Mouse moved (if REPORTMOUSE) |
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| `IDCMP_GADGETDOWN` | `$0020` | Gadget pressed |
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| `IDCMP_GADGETUP` | `$0040` | Gadget released |
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| `IDCMP_REQSET` | `$0080` | Requester activated |
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| `IDCMP_MENUPICK` | `$0100` | Menu item selected |
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| `IDCMP_CLOSEWINDOW` | `$0200` | Close gadget clicked |
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| `IDCMP_RAWKEY` | `$0400` | Raw keyboard event |
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| `IDCMP_REQVERIFY` | `$0800` | Requester about to open |
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| `IDCMP_REQCLEAR` | `$1000` | Requester closed |
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| `IDCMP_MENUVERIFY` | `$2000` | Menu about to open |
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| `IDCMP_NEWPREFS` | `$4000` | Preferences changed |
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| `IDCMP_DISKINSERTED` | `$8000` | Disk inserted |
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| `IDCMP_DISKREMOVED` | `$10000` | Disk removed |
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| `IDCMP_ACTIVEWINDOW` | `$40000` | Window activated |
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| `IDCMP_INACTIVEWINDOW` | `$80000` | Window deactivated |
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| `IDCMP_DELTAMOVE` | `$100000` | Delta mouse movement |
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| `IDCMP_VANILLAKEY` | `$200000` | Translated ASCII keypress |
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| `IDCMP_INTUITICKS` | `$400000` | ~10Hz timer tick |
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| `IDCMP_IDCMPUPDATE` | `$800000` | BOOPSI gadget update |
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| `IDCMP_CHANGEWINDOW` | `$2000000` | Window moved/resized |
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---
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## Qualifier Flags
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| Constant | Hex | Description |
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|---|---|---|
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| `IEQUALIFIER_LSHIFT` | `$0001` | Left Shift |
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| `IEQUALIFIER_RSHIFT` | `$0002` | Right Shift |
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| `IEQUALIFIER_CAPSLOCK` | `$0004` | Caps Lock |
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| `IEQUALIFIER_CONTROL` | `$0008` | Control |
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| `IEQUALIFIER_LALT` | `$0010` | Left Alt |
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| `IEQUALIFIER_RALT` | `$0020` | Right Alt |
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| `IEQUALIFIER_LCOMMAND` | `$0040` | Left Amiga |
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| `IEQUALIFIER_RCOMMAND` | `$0080` | Right Amiga |
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| `IEQUALIFIER_LEFTBUTTON` | `$4000` | LMB |
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| `IEQUALIFIER_MIDBUTTON` | `$1000` | MMB |
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| `IEQUALIFIER_RBUTTON` | `$8000` | RMB (not standard) |
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---
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## References
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- NDK39: `intuition/intuition.h`, `devices/inputevent.h`
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- ADCD 2.1: IDCMP reference
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