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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkpointer.c,v 1.1.1.1 2001/06/13 05:07:19 dtashley Exp $ */
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/*
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* tkPointer.c --
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*
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* This file contains functions for emulating the X server
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* pointer and grab state machine. This file is used by the
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* Mac and Windows platforms to generate appropriate enter/leave
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* events, and to update the global grab window information.
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*
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* Copyright (c) 1996 by Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkpointer.c,v 1.1.1.1 2001/06/13 05:07:19 dtashley Exp $
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*/
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#include "tkInt.h"
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#ifdef __WIN32__
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#include "tkWinInt.h"
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#endif
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#ifdef MAC_TCL
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#define Cursor XCursor
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#endif
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/*
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* Mask that selects any of the state bits corresponding to buttons,
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* plus masks that select individual buttons' bits:
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*/
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#define ALL_BUTTONS \
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(Button1Mask|Button2Mask|Button3Mask|Button4Mask|Button5Mask)
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static unsigned int buttonMasks[] = {
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Button1Mask, Button2Mask, Button3Mask, Button4Mask, Button5Mask
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};
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#define ButtonMask(b) (buttonMasks[(b)-Button1])
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typedef struct ThreadSpecificData {
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TkWindow *grabWinPtr; /* Window that defines the top of the
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* grab tree in a global grab. */
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int lastState; /* Last known state flags. */
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XPoint lastPos; /* Last reported mouse position. */
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TkWindow *lastWinPtr; /* Last reported mouse window. */
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TkWindow *restrictWinPtr; /* Window to which all mouse events
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* will be reported. */
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TkWindow *cursorWinPtr; /* Window that is currently
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* controlling the global cursor. */
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} ThreadSpecificData;
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static Tcl_ThreadDataKey dataKey;
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/*
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* Forward declarations of procedures used in this file.
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*/
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static int GenerateEnterLeave _ANSI_ARGS_((TkWindow *winPtr,
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int x, int y, int state));
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static void InitializeEvent _ANSI_ARGS_((XEvent* eventPtr,
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TkWindow *winPtr, int type, int x, int y,
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int state, int detail));
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static void UpdateCursor _ANSI_ARGS_((TkWindow *winPtr));
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/*
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*----------------------------------------------------------------------
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*
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* InitializeEvent --
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*
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* Initializes the common fields for several X events.
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*
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* Results:
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* None.
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*
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* Side effects:
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* Fills in the specified event structure.
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*
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*----------------------------------------------------------------------
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*/
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static void
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InitializeEvent(eventPtr, winPtr, type, x, y, state, detail)
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XEvent* eventPtr; /* Event structure to initialize. */
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TkWindow *winPtr; /* Window to make event relative to. */
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int type; /* Message type. */
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int x, y; /* Root coords of event. */
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int state; /* State flags. */
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int detail; /* Detail value. */
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{
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eventPtr->type = type;
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eventPtr->xany.serial = LastKnownRequestProcessed(winPtr->display);
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eventPtr->xany.send_event = False;
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eventPtr->xany.display = winPtr->display;
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eventPtr->xcrossing.root = RootWindow(winPtr->display, winPtr->screenNum);
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eventPtr->xcrossing.time = TkpGetMS();
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eventPtr->xcrossing.x_root = x;
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eventPtr->xcrossing.y_root = y;
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switch (type) {
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case EnterNotify:
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case LeaveNotify:
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eventPtr->xcrossing.mode = NotifyNormal;
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eventPtr->xcrossing.state = state;
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eventPtr->xcrossing.detail = detail;
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eventPtr->xcrossing.focus = False;
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break;
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case MotionNotify:
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eventPtr->xmotion.state = state;
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eventPtr->xmotion.is_hint = detail;
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break;
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case ButtonPress:
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case ButtonRelease:
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eventPtr->xbutton.state = state;
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eventPtr->xbutton.button = detail;
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break;
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}
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TkChangeEventWindow(eventPtr, winPtr);
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}
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/*
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*----------------------------------------------------------------------
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*
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* GenerateEnterLeave --
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*
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* Update the current mouse window and position, and generate
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* any enter/leave events that are needed.
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*
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* Results:
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* Returns 1 if enter/leave events were generated.
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*
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* Side effects:
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* May insert events into the Tk event queue.
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*
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*----------------------------------------------------------------------
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*/
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static int
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GenerateEnterLeave(winPtr, x, y, state)
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TkWindow *winPtr; /* Current Tk window (or NULL). */
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int x,y; /* Current mouse position in root coords. */
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int state; /* State flags. */
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{
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int crossed = 0; /* 1 if mouse crossed a window boundary */
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
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TkWindow *restrictWinPtr = tsdPtr->restrictWinPtr;
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TkWindow *lastWinPtr = tsdPtr->lastWinPtr;
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if (winPtr != tsdPtr->lastWinPtr) {
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if (restrictWinPtr) {
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int newPos, oldPos;
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newPos = TkPositionInTree(winPtr, restrictWinPtr);
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oldPos = TkPositionInTree(lastWinPtr, restrictWinPtr);
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/*
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* Check if the mouse crossed into or out of the restrict
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* window. If so, we need to generate an Enter or Leave event.
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*/
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if ((newPos != oldPos) && ((newPos == TK_GRAB_IN_TREE)
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|| (oldPos == TK_GRAB_IN_TREE))) {
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XEvent event;
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int type, detail;
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if (newPos == TK_GRAB_IN_TREE) {
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type = EnterNotify;
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} else {
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type = LeaveNotify;
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}
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if ((oldPos == TK_GRAB_ANCESTOR)
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|| (newPos == TK_GRAB_ANCESTOR)) {
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detail = NotifyAncestor;
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} else {
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detail = NotifyVirtual;
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}
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InitializeEvent(&event, restrictWinPtr, type, x, y,
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state, detail);
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Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
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}
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} else {
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TkWindow *targetPtr;
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if ((lastWinPtr == NULL)
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|| (lastWinPtr->window == None)) {
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targetPtr = winPtr;
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} else {
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targetPtr = lastWinPtr;
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}
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if (targetPtr && (targetPtr->window != None)) {
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XEvent event;
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/*
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* Generate appropriate Enter/Leave events.
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*/
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InitializeEvent(&event, targetPtr, LeaveNotify, x, y, state,
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NotifyNormal);
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TkInOutEvents(&event, lastWinPtr, winPtr, LeaveNotify,
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EnterNotify, TCL_QUEUE_TAIL);
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crossed = 1;
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}
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}
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tsdPtr->lastWinPtr = winPtr;
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}
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return crossed;
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tk_UpdatePointer --
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*
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* This function updates the pointer state machine given an
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* the current window, position and modifier state.
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*
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* Results:
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* None.
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*
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* Side effects:
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* May queue new events and update the grab state.
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*
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*----------------------------------------------------------------------
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*/
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void
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Tk_UpdatePointer(tkwin, x, y, state)
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Tk_Window tkwin; /* Window to which pointer event
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* is reported. May be NULL. */
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int x, y; /* Pointer location in root coords. */
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int state; /* Modifier state mask. */
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{
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ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
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Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
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TkWindow *winPtr = (TkWindow *)tkwin;
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TkWindow *targetWinPtr;
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XPoint pos;
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XEvent event;
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int changes = (state ^ tsdPtr->lastState) & ALL_BUTTONS;
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int type, b, mask;
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pos.x = x;
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pos.y = y;
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/*
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* Use the current keyboard state, but the old mouse button
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* state since we haven't generated the button events yet.
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*/
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tsdPtr->lastState = (state & ~ALL_BUTTONS) | (tsdPtr->lastState
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& ALL_BUTTONS);
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/*
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* Generate Enter/Leave events. If the pointer has crossed window
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* boundaries, update the current mouse position so we don't generate
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* redundant motion events.
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*/
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if (GenerateEnterLeave(winPtr, x, y, tsdPtr->lastState)) {
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tsdPtr->lastPos = pos;
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}
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/*
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* Generate ButtonPress/ButtonRelease events based on the differences
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* between the current button state and the last known button state.
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*/
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for (b = Button1; b <= Button3; b++) {
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mask = ButtonMask(b);
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if (changes & mask) {
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if (state & mask) {
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type = ButtonPress;
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/*
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* ButtonPress - Set restrict window if we aren't grabbed, or
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* if this is the first button down.
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*/
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if (!tsdPtr->restrictWinPtr) {
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if (!tsdPtr->grabWinPtr) {
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/*
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* Mouse is not grabbed, so set a button grab.
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*/
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tsdPtr->restrictWinPtr = winPtr;
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TkpSetCapture(tsdPtr->restrictWinPtr);
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} else if ((tsdPtr->lastState & ALL_BUTTONS) == 0) {
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/*
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* Mouse is in a non-button grab, so ensure
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* the button grab is inside the grab tree.
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*/
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if (TkPositionInTree(winPtr, tsdPtr->grabWinPtr)
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== TK_GRAB_IN_TREE) {
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tsdPtr->restrictWinPtr = winPtr;
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} else {
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tsdPtr->restrictWinPtr = tsdPtr->grabWinPtr;
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}
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TkpSetCapture(tsdPtr->restrictWinPtr);
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}
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}
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} else {
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type = ButtonRelease;
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/*
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315 |
* ButtonRelease - Release the mouse capture and clear the
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316 |
* restrict window when the last button is released and we
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* aren't in a global grab.
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318 |
*/
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319 |
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320 |
if ((tsdPtr->lastState & ALL_BUTTONS) == mask) {
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321 |
if (!tsdPtr->grabWinPtr) {
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TkpSetCapture(NULL);
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}
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}
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325 |
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326 |
/*
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327 |
* If we are releasing a restrict window, then we need
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328 |
* to send the button event followed by mouse motion from
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329 |
* the restrict window to the current mouse position.
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330 |
*/
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331 |
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332 |
if (tsdPtr->restrictWinPtr) {
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InitializeEvent(&event, tsdPtr->restrictWinPtr, type, x, y,
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tsdPtr->lastState, b);
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Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
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tsdPtr->lastState &= ~mask;
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tsdPtr->lastWinPtr = tsdPtr->restrictWinPtr;
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tsdPtr->restrictWinPtr = NULL;
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GenerateEnterLeave(winPtr, x, y, tsdPtr->lastState);
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tsdPtr->lastPos = pos;
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continue;
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}
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344 |
}
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345 |
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346 |
/*
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347 |
* If a restrict window is set, make sure the pointer event
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* is reported relative to that window. Otherwise, if a
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349 |
* global grab is in effect then events outside of windows
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350 |
* managed by Tk should be reported to the grab window.
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351 |
*/
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352 |
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353 |
if (tsdPtr->restrictWinPtr) {
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354 |
targetWinPtr = tsdPtr->restrictWinPtr;
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} else if (tsdPtr->grabWinPtr && !winPtr) {
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356 |
targetWinPtr = tsdPtr->grabWinPtr;
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357 |
} else {
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358 |
targetWinPtr = winPtr;
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359 |
}
|
360 |
|
361 |
/*
|
362 |
* If we still have a target window, send the event.
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363 |
*/
|
364 |
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365 |
if (winPtr != NULL) {
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366 |
InitializeEvent(&event, targetWinPtr, type, x, y,
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367 |
tsdPtr->lastState, b);
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368 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
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369 |
}
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370 |
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371 |
/*
|
372 |
* Update the state for the next iteration.
|
373 |
*/
|
374 |
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375 |
tsdPtr->lastState = (type == ButtonPress)
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376 |
? (tsdPtr->lastState | mask) : (tsdPtr->lastState & ~mask);
|
377 |
tsdPtr->lastPos = pos;
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378 |
}
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379 |
}
|
380 |
|
381 |
/*
|
382 |
* Make sure the cursor window is up to date.
|
383 |
*/
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384 |
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385 |
if (tsdPtr->restrictWinPtr) {
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386 |
targetWinPtr = tsdPtr->restrictWinPtr;
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387 |
} else if (tsdPtr->grabWinPtr) {
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388 |
targetWinPtr = (TkPositionInTree(winPtr, tsdPtr->grabWinPtr)
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389 |
== TK_GRAB_IN_TREE) ? winPtr : tsdPtr->grabWinPtr;
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390 |
} else {
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391 |
targetWinPtr = winPtr;
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392 |
}
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393 |
UpdateCursor(targetWinPtr);
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394 |
|
395 |
/*
|
396 |
* If no other events caused the position to be updated,
|
397 |
* generate a motion event.
|
398 |
*/
|
399 |
|
400 |
if (tsdPtr->lastPos.x != pos.x || tsdPtr->lastPos.y != pos.y) {
|
401 |
if (tsdPtr->restrictWinPtr) {
|
402 |
targetWinPtr = tsdPtr->restrictWinPtr;
|
403 |
} else if (tsdPtr->grabWinPtr && !winPtr) {
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404 |
targetWinPtr = tsdPtr->grabWinPtr;
|
405 |
}
|
406 |
|
407 |
if (targetWinPtr != NULL) {
|
408 |
InitializeEvent(&event, targetWinPtr, MotionNotify, x, y,
|
409 |
tsdPtr->lastState, NotifyNormal);
|
410 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
|
411 |
}
|
412 |
tsdPtr->lastPos = pos;
|
413 |
}
|
414 |
}
|
415 |
|
416 |
/*
|
417 |
*----------------------------------------------------------------------
|
418 |
*
|
419 |
* XGrabPointer --
|
420 |
*
|
421 |
* Capture the mouse so event are reported outside of toplevels.
|
422 |
* Note that this is a very limited implementation that only
|
423 |
* supports GrabModeAsync and owner_events True.
|
424 |
*
|
425 |
* Results:
|
426 |
* Always returns GrabSuccess.
|
427 |
*
|
428 |
* Side effects:
|
429 |
* Turns on mouse capture, sets the global grab pointer, and
|
430 |
* clears any window restrictions.
|
431 |
*
|
432 |
*----------------------------------------------------------------------
|
433 |
*/
|
434 |
|
435 |
int
|
436 |
XGrabPointer(display, grab_window, owner_events, event_mask, pointer_mode,
|
437 |
keyboard_mode, confine_to, cursor, time)
|
438 |
Display* display;
|
439 |
Window grab_window;
|
440 |
Bool owner_events;
|
441 |
unsigned int event_mask;
|
442 |
int pointer_mode;
|
443 |
int keyboard_mode;
|
444 |
Window confine_to;
|
445 |
Cursor cursor;
|
446 |
Time time;
|
447 |
{
|
448 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
449 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
450 |
|
451 |
display->request++;
|
452 |
tsdPtr->grabWinPtr = (TkWindow *) Tk_IdToWindow(display, grab_window);
|
453 |
tsdPtr->restrictWinPtr = NULL;
|
454 |
TkpSetCapture(tsdPtr->grabWinPtr);
|
455 |
if (TkPositionInTree(tsdPtr->lastWinPtr, tsdPtr->grabWinPtr)
|
456 |
!= TK_GRAB_IN_TREE) {
|
457 |
UpdateCursor(tsdPtr->grabWinPtr);
|
458 |
}
|
459 |
return GrabSuccess;
|
460 |
}
|
461 |
|
462 |
/*
|
463 |
*----------------------------------------------------------------------
|
464 |
*
|
465 |
* XUngrabPointer --
|
466 |
*
|
467 |
* Release the current grab.
|
468 |
*
|
469 |
* Results:
|
470 |
* None.
|
471 |
*
|
472 |
* Side effects:
|
473 |
* Releases the mouse capture.
|
474 |
*
|
475 |
*----------------------------------------------------------------------
|
476 |
*/
|
477 |
|
478 |
void
|
479 |
XUngrabPointer(display, time)
|
480 |
Display* display;
|
481 |
Time time;
|
482 |
{
|
483 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
484 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
485 |
|
486 |
display->request++;
|
487 |
tsdPtr->grabWinPtr = NULL;
|
488 |
tsdPtr->restrictWinPtr = NULL;
|
489 |
TkpSetCapture(NULL);
|
490 |
UpdateCursor(tsdPtr->lastWinPtr);
|
491 |
}
|
492 |
|
493 |
/*
|
494 |
*----------------------------------------------------------------------
|
495 |
*
|
496 |
* TkPointerDeadWindow --
|
497 |
*
|
498 |
* Clean up pointer module state when a window is destroyed.
|
499 |
*
|
500 |
* Results:
|
501 |
* None.
|
502 |
*
|
503 |
* Side effects:
|
504 |
* May release the current capture window.
|
505 |
*
|
506 |
*----------------------------------------------------------------------
|
507 |
*/
|
508 |
|
509 |
void
|
510 |
TkPointerDeadWindow(winPtr)
|
511 |
TkWindow *winPtr;
|
512 |
{
|
513 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
514 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
515 |
|
516 |
if (winPtr == tsdPtr->lastWinPtr) {
|
517 |
tsdPtr->lastWinPtr = NULL;
|
518 |
}
|
519 |
if (winPtr == tsdPtr->grabWinPtr) {
|
520 |
tsdPtr->grabWinPtr = NULL;
|
521 |
}
|
522 |
if (winPtr == tsdPtr->restrictWinPtr) {
|
523 |
tsdPtr->restrictWinPtr = NULL;
|
524 |
}
|
525 |
if (!(tsdPtr->restrictWinPtr || tsdPtr->grabWinPtr)) {
|
526 |
TkpSetCapture(NULL);
|
527 |
}
|
528 |
}
|
529 |
|
530 |
/*
|
531 |
*----------------------------------------------------------------------
|
532 |
*
|
533 |
* UpdateCursor --
|
534 |
*
|
535 |
* Set the windows global cursor to the cursor associated with
|
536 |
* the given Tk window.
|
537 |
*
|
538 |
* Results:
|
539 |
* None.
|
540 |
*
|
541 |
* Side effects:
|
542 |
* Changes the mouse cursor.
|
543 |
*
|
544 |
*----------------------------------------------------------------------
|
545 |
*/
|
546 |
|
547 |
static void
|
548 |
UpdateCursor(winPtr)
|
549 |
TkWindow *winPtr;
|
550 |
{
|
551 |
Cursor cursor = None;
|
552 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
553 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
554 |
|
555 |
/*
|
556 |
* A window inherits its cursor from its parent if it doesn't
|
557 |
* have one of its own. Top level windows inherit the default
|
558 |
* cursor.
|
559 |
*/
|
560 |
|
561 |
tsdPtr->cursorWinPtr = winPtr;
|
562 |
while (winPtr != NULL) {
|
563 |
if (winPtr->atts.cursor != None) {
|
564 |
cursor = winPtr->atts.cursor;
|
565 |
break;
|
566 |
} else if (winPtr->flags & TK_TOP_LEVEL) {
|
567 |
break;
|
568 |
}
|
569 |
winPtr = winPtr->parentPtr;
|
570 |
}
|
571 |
TkpSetCursor((TkpCursor) cursor);
|
572 |
}
|
573 |
|
574 |
/*
|
575 |
*----------------------------------------------------------------------
|
576 |
*
|
577 |
* XDefineCursor --
|
578 |
*
|
579 |
* This function is called to update the cursor on a window.
|
580 |
* Since the mouse might be in the specified window, we need to
|
581 |
* check the specified window against the current mouse position
|
582 |
* and grab state.
|
583 |
*
|
584 |
* Results:
|
585 |
* None.
|
586 |
*
|
587 |
* Side effects:
|
588 |
* May update the cursor.
|
589 |
*
|
590 |
*----------------------------------------------------------------------
|
591 |
*/
|
592 |
|
593 |
void
|
594 |
XDefineCursor(display, w, cursor)
|
595 |
Display* display;
|
596 |
Window w;
|
597 |
Cursor cursor;
|
598 |
{
|
599 |
TkWindow *winPtr = (TkWindow *)Tk_IdToWindow(display, w);
|
600 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
|
601 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
|
602 |
|
603 |
if (tsdPtr->cursorWinPtr == winPtr) {
|
604 |
UpdateCursor(winPtr);
|
605 |
}
|
606 |
display->request++;
|
607 |
}
|
608 |
|
609 |
/*
|
610 |
*----------------------------------------------------------------------
|
611 |
*
|
612 |
* TkGenerateActivateEvents --
|
613 |
*
|
614 |
* This function is called by the Mac and Windows window manager
|
615 |
* routines when a toplevel window is activated or deactivated.
|
616 |
* Activate/Deactivate events will be sent to every subwindow of
|
617 |
* the toplevel followed by a FocusIn/FocusOut message.
|
618 |
*
|
619 |
* Results:
|
620 |
* None.
|
621 |
*
|
622 |
* Side effects:
|
623 |
* Generates X events.
|
624 |
*
|
625 |
*----------------------------------------------------------------------
|
626 |
*/
|
627 |
|
628 |
void
|
629 |
TkGenerateActivateEvents(winPtr, active)
|
630 |
TkWindow *winPtr; /* Toplevel to activate. */
|
631 |
int active; /* Non-zero if the window is being
|
632 |
* activated, else 0.*/
|
633 |
{
|
634 |
XEvent event;
|
635 |
|
636 |
/*
|
637 |
* Generate Activate and Deactivate events. This event
|
638 |
* is sent to every subwindow in a toplevel window.
|
639 |
*/
|
640 |
|
641 |
event.xany.serial = winPtr->display->request++;
|
642 |
event.xany.send_event = False;
|
643 |
event.xany.display = winPtr->display;
|
644 |
event.xany.window = winPtr->window;
|
645 |
|
646 |
event.xany.type = active ? ActivateNotify : DeactivateNotify;
|
647 |
TkQueueEventForAllChildren(winPtr, &event);
|
648 |
|
649 |
}
|
650 |
|
651 |
|
652 |
/* $History: tkPointer.c $
|
653 |
*
|
654 |
* ***************** Version 1 *****************
|
655 |
* User: Dtashley Date: 1/02/01 Time: 3:04a
|
656 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
657 |
* Initial check-in.
|
658 |
*/
|
659 |
|
660 |
/* End of TKPOINTER.C */ |