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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkwinscrlbr.c,v 1.1.1.1 2001/06/13 05:14:22 dtashley Exp $ */
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/*
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* tkWinScrollbar.c --
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*
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* This file implements the Windows specific portion of the scrollbar
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* widget.
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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: tkwinscrlbr.c,v 1.1.1.1 2001/06/13 05:14:22 dtashley Exp $
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*/
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#include "tkWinInt.h"
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#include "tkScrollbar.h"
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/*
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* The following constant is used to specify the maximum scroll position.
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* This value is limited by the Win32 API to either 16-bits or 32-bits,
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* depending on the context. For now we'll just use a value small
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* enough to fit in 16-bits, but which gives us 4-digits of precision.
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*/
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#define MAX_SCROLL 10000
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/*
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* Declaration of Windows specific scrollbar structure.
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*/
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typedef struct WinScrollbar {
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TkScrollbar info; /* Generic scrollbar info. */
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WNDPROC oldProc; /* Old window procedure. */
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int lastVertical; /* 1 if was vertical at last refresh. */
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HWND hwnd; /* Current window handle. */
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int winFlags; /* Various flags; see below. */
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} WinScrollbar;
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/*
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* Flag bits for native scrollbars:
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*
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* IN_MODAL_LOOP: Non-zero means this scrollbar is in the middle
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* of a modal loop.
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* ALREADY_DEAD: Non-zero means this scrollbar has been
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* destroyed, but has not been cleaned up.
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*/
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#define IN_MODAL_LOOP 1
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#define ALREADY_DEAD 2
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/*
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* Cached system metrics used to determine scrollbar geometry.
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*/
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static int initialized = 0;
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static int hArrowWidth, hThumb; /* Horizontal control metrics. */
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static int vArrowWidth, vArrowHeight, vThumb; /* Vertical control metrics. */
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TCL_DECLARE_MUTEX(winScrlbrMutex)
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/*
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* This variable holds the default width for a scrollbar in string
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* form for use in a Tk_ConfigSpec.
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*/
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static char defWidth[TCL_INTEGER_SPACE];
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/*
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* Declarations for functions defined in this file.
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*/
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static Window CreateProc _ANSI_ARGS_((Tk_Window tkwin,
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Window parent, ClientData instanceData));
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static void ModalLoopProc _ANSI_ARGS_((Tk_Window tkwin,
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XEvent *eventPtr));
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static int ScrollbarBindProc _ANSI_ARGS_((ClientData clientData,
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Tcl_Interp *interp, XEvent *eventPtr,
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Tk_Window tkwin, KeySym keySym));
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static LRESULT CALLBACK ScrollbarProc _ANSI_ARGS_((HWND hwnd, UINT message,
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WPARAM wParam, LPARAM lParam));
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static void UpdateScrollbar _ANSI_ARGS_((
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WinScrollbar *scrollPtr));
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static void UpdateScrollbarMetrics _ANSI_ARGS_((void));
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/*
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* The class procedure table for the scrollbar widget.
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*/
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TkClassProcs tkpScrollbarProcs = {
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CreateProc, /* createProc */
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NULL, /* geometryProc */
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ModalLoopProc, /* modalProc */
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};
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/*
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*----------------------------------------------------------------------
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*
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* TkpCreateScrollbar --
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*
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* Allocate a new TkScrollbar structure.
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*
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* Results:
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* Returns a newly allocated TkScrollbar structure.
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*
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* Side effects:
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* Registers an event handler for the widget.
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*
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*----------------------------------------------------------------------
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*/
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TkScrollbar *
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TkpCreateScrollbar(tkwin)
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Tk_Window tkwin;
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{
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WinScrollbar *scrollPtr;
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TkWindow *winPtr = (TkWindow *)tkwin;
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if (!initialized) {
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Tcl_MutexLock(&winScrlbrMutex);
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UpdateScrollbarMetrics();
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initialized = 1;
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Tcl_MutexUnlock(&winScrlbrMutex);
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}
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scrollPtr = (WinScrollbar *) ckalloc(sizeof(WinScrollbar));
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scrollPtr->winFlags = 0;
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scrollPtr->hwnd = NULL;
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Tk_CreateEventHandler(tkwin,
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ExposureMask|StructureNotifyMask|FocusChangeMask,
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TkScrollbarEventProc, (ClientData) scrollPtr);
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if (!Tcl_GetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL)) {
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Tcl_SetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL,
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(ClientData)1);
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TkCreateBindingProcedure(winPtr->mainPtr->interp,
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winPtr->mainPtr->bindingTable,
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(ClientData)Tk_GetUid("Scrollbar"), "<ButtonPress>",
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ScrollbarBindProc, NULL, NULL);
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}
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return (TkScrollbar*) scrollPtr;
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}
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/*
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*----------------------------------------------------------------------
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*
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* UpdateScrollbar --
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*
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* This function updates the position and size of the scrollbar
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* thumb based on the current settings.
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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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* Moves the thumb.
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*
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*----------------------------------------------------------------------
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*/
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static void
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UpdateScrollbar(scrollPtr)
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WinScrollbar *scrollPtr;
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{
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SCROLLINFO scrollInfo;
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double thumbSize;
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/*
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* Update the current scrollbar position and shape.
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*/
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scrollInfo.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
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scrollInfo.cbSize = sizeof(scrollInfo);
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scrollInfo.nMin = 0;
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scrollInfo.nMax = MAX_SCROLL;
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thumbSize = (scrollPtr->info.lastFraction - scrollPtr->info.firstFraction);
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scrollInfo.nPage = ((UINT) (thumbSize * (double) MAX_SCROLL)) + 1;
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if (thumbSize < 1.0) {
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scrollInfo.nPos = (int)
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((scrollPtr->info.firstFraction / (1.0-thumbSize))
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* (MAX_SCROLL - (scrollInfo.nPage - 1)));
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} else {
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scrollInfo.nPos = 0;
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}
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SetScrollInfo(scrollPtr->hwnd, SB_CTL, &scrollInfo, TRUE);
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}
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/*
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*----------------------------------------------------------------------
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*
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* CreateProc --
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*
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* This function creates a new Scrollbar control, subclasses
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* the instance, and generates a new Window object.
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*
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* Results:
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* Returns the newly allocated Window object, or None on failure.
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*
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* Side effects:
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* Causes a new Scrollbar control to come into existence.
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*
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*----------------------------------------------------------------------
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*/
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static Window
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CreateProc(tkwin, parentWin, instanceData)
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Tk_Window tkwin; /* Token for window. */
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Window parentWin; /* Parent of new window. */
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ClientData instanceData; /* Scrollbar instance data. */
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{
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DWORD style;
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Window window;
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HWND parent;
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TkWindow *winPtr;
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WinScrollbar *scrollPtr = (WinScrollbar *)instanceData;
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parent = Tk_GetHWND(parentWin);
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if (scrollPtr->info.vertical) {
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style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS
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| SBS_VERT | SBS_RIGHTALIGN;
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} else {
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style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS
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| SBS_HORZ | SBS_BOTTOMALIGN;
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}
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scrollPtr->hwnd = CreateWindow("SCROLLBAR", NULL, style,
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Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin),
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parent, NULL, Tk_GetHINSTANCE(), NULL);
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/*
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* Ensure new window is inserted into the stacking order at the correct
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* place.
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*/
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SetWindowPos(scrollPtr->hwnd, HWND_TOP, 0, 0, 0, 0,
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SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
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for (winPtr = ((TkWindow*)tkwin)->nextPtr; winPtr != NULL;
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winPtr = winPtr->nextPtr) {
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if ((winPtr->window != None) && !(winPtr->flags & TK_TOP_LEVEL)) {
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TkWinSetWindowPos(scrollPtr->hwnd, Tk_GetHWND(winPtr->window),
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Below);
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break;
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}
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}
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scrollPtr->lastVertical = scrollPtr->info.vertical;
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scrollPtr->oldProc = (WNDPROC)SetWindowLong(scrollPtr->hwnd, GWL_WNDPROC,
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(DWORD) ScrollbarProc);
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window = Tk_AttachHWND(tkwin, scrollPtr->hwnd);
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UpdateScrollbar(scrollPtr);
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return window;
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}
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/*
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*--------------------------------------------------------------
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*
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* TkpDisplayScrollbar --
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*
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* This procedure redraws the contents of a scrollbar window.
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* It is invoked as a do-when-idle handler, so it only runs
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* when there's nothing else for the application to do.
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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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* Information appears on the screen.
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*
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*--------------------------------------------------------------
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*/
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void
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TkpDisplayScrollbar(clientData)
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ClientData clientData; /* Information about window. */
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{
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WinScrollbar *scrollPtr = (WinScrollbar *) clientData;
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Tk_Window tkwin = scrollPtr->info.tkwin;
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scrollPtr->info.flags &= ~REDRAW_PENDING;
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if ((tkwin == NULL) || !Tk_IsMapped(tkwin)) {
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return;
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}
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/*
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* Destroy and recreate the scrollbar control if the orientation
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* has changed.
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*/
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if (scrollPtr->lastVertical != scrollPtr->info.vertical) {
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HWND hwnd = Tk_GetHWND(Tk_WindowId(tkwin));
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SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) scrollPtr->oldProc);
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DestroyWindow(hwnd);
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CreateProc(tkwin, Tk_WindowId(Tk_Parent(tkwin)),
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(ClientData) scrollPtr);
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} else {
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UpdateScrollbar(scrollPtr);
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}
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}
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/*
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*----------------------------------------------------------------------
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*
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* TkpDestroyScrollbar --
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*
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* Free data structures associated with the scrollbar control.
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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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* Restores the default control state.
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*
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*----------------------------------------------------------------------
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*/
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void
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TkpDestroyScrollbar(scrollPtr)
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TkScrollbar *scrollPtr;
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{
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WinScrollbar *winScrollPtr = (WinScrollbar *)scrollPtr;
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HWND hwnd = winScrollPtr->hwnd;
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if (hwnd) {
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SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) winScrollPtr->oldProc);
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if (winScrollPtr->winFlags & IN_MODAL_LOOP) {
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((TkWindow *)scrollPtr->tkwin)->flags |= TK_DONT_DESTROY_WINDOW;
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SetParent(hwnd, NULL);
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}
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}
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winScrollPtr->winFlags |= ALREADY_DEAD;
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}
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/*
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*----------------------------------------------------------------------
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*
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* UpdateScrollbarMetrics --
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| 346 |
*
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| 347 |
* This function retrieves the current system metrics for a
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* scrollbar.
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*
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* Results:
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| 351 |
* None.
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*
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* Side effects:
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* Updates the geometry cache info for all scrollbars.
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*
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*----------------------------------------------------------------------
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*/
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void
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UpdateScrollbarMetrics()
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{
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Tk_ConfigSpec *specPtr;
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hArrowWidth = GetSystemMetrics(SM_CXHSCROLL);
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hThumb = GetSystemMetrics(SM_CXHTHUMB);
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vArrowWidth = GetSystemMetrics(SM_CXVSCROLL);
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vArrowHeight = GetSystemMetrics(SM_CYVSCROLL);
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vThumb = GetSystemMetrics(SM_CYVTHUMB);
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sprintf(defWidth, "%d", vArrowWidth);
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for (specPtr = tkpScrollbarConfigSpecs; specPtr->type != TK_CONFIG_END;
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specPtr++) {
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if (specPtr->offset == Tk_Offset(TkScrollbar, width)) {
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specPtr->defValue = defWidth;
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| 375 |
}
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}
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}
|
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| 379 |
/*
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*----------------------------------------------------------------------
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*
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| 382 |
* TkpComputeScrollbarGeometry --
|
| 383 |
*
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| 384 |
* After changes in a scrollbar's size or configuration, this
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* procedure recomputes various geometry information used in
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| 386 |
* displaying the scrollbar.
|
| 387 |
*
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| 388 |
* Results:
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| 389 |
* None.
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| 390 |
*
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| 391 |
* Side effects:
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| 392 |
* The scrollbar will be displayed differently.
|
| 393 |
*
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| 394 |
*----------------------------------------------------------------------
|
| 395 |
*/
|
| 396 |
|
| 397 |
void
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| 398 |
TkpComputeScrollbarGeometry(scrollPtr)
|
| 399 |
register TkScrollbar *scrollPtr; /* Scrollbar whose geometry may
|
| 400 |
* have changed. */
|
| 401 |
{
|
| 402 |
int fieldLength, minThumbSize;
|
| 403 |
|
| 404 |
/*
|
| 405 |
* Windows doesn't use focus rings on scrollbars, but we still
|
| 406 |
* perform basic sanity checks to appease backwards compatibility.
|
| 407 |
*/
|
| 408 |
|
| 409 |
if (scrollPtr->highlightWidth < 0) {
|
| 410 |
scrollPtr->highlightWidth = 0;
|
| 411 |
}
|
| 412 |
|
| 413 |
if (scrollPtr->vertical) {
|
| 414 |
scrollPtr->arrowLength = vArrowHeight;
|
| 415 |
fieldLength = Tk_Height(scrollPtr->tkwin);
|
| 416 |
minThumbSize = vThumb;
|
| 417 |
} else {
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| 418 |
scrollPtr->arrowLength = hArrowWidth;
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| 419 |
fieldLength = Tk_Width(scrollPtr->tkwin);
|
| 420 |
minThumbSize = hThumb;
|
| 421 |
}
|
| 422 |
fieldLength -= 2*scrollPtr->arrowLength;
|
| 423 |
if (fieldLength < 0) {
|
| 424 |
fieldLength = 0;
|
| 425 |
}
|
| 426 |
scrollPtr->sliderFirst = (int) ((double)fieldLength
|
| 427 |
* scrollPtr->firstFraction);
|
| 428 |
scrollPtr->sliderLast = (int) ((double)fieldLength
|
| 429 |
* scrollPtr->lastFraction);
|
| 430 |
|
| 431 |
/*
|
| 432 |
* Adjust the slider so that some piece of it is always
|
| 433 |
* displayed in the scrollbar and so that it has at least
|
| 434 |
* a minimal width (so it can be grabbed with the mouse).
|
| 435 |
*/
|
| 436 |
|
| 437 |
if (scrollPtr->sliderFirst > fieldLength) {
|
| 438 |
scrollPtr->sliderFirst = fieldLength;
|
| 439 |
}
|
| 440 |
if (scrollPtr->sliderFirst < 0) {
|
| 441 |
scrollPtr->sliderFirst = 0;
|
| 442 |
}
|
| 443 |
if (scrollPtr->sliderLast < (scrollPtr->sliderFirst
|
| 444 |
+ minThumbSize)) {
|
| 445 |
scrollPtr->sliderLast = scrollPtr->sliderFirst + minThumbSize;
|
| 446 |
}
|
| 447 |
if (scrollPtr->sliderLast > fieldLength) {
|
| 448 |
scrollPtr->sliderLast = fieldLength;
|
| 449 |
}
|
| 450 |
scrollPtr->sliderFirst += scrollPtr->arrowLength;
|
| 451 |
scrollPtr->sliderLast += scrollPtr->arrowLength;
|
| 452 |
|
| 453 |
/*
|
| 454 |
* Register the desired geometry for the window (leave enough space
|
| 455 |
* for the two arrows plus a minimum-size slider, plus border around
|
| 456 |
* the whole window, if any). Then arrange for the window to be
|
| 457 |
* redisplayed.
|
| 458 |
*/
|
| 459 |
|
| 460 |
if (scrollPtr->vertical) {
|
| 461 |
Tk_GeometryRequest(scrollPtr->tkwin,
|
| 462 |
scrollPtr->width, 2*scrollPtr->arrowLength + minThumbSize);
|
| 463 |
} else {
|
| 464 |
Tk_GeometryRequest(scrollPtr->tkwin,
|
| 465 |
2*scrollPtr->arrowLength + minThumbSize, scrollPtr->width);
|
| 466 |
}
|
| 467 |
Tk_SetInternalBorder(scrollPtr->tkwin, 0);
|
| 468 |
}
|
| 469 |
|
| 470 |
/*
|
| 471 |
*----------------------------------------------------------------------
|
| 472 |
*
|
| 473 |
* ScrollbarProc --
|
| 474 |
*
|
| 475 |
* This function is call by Windows whenever an event occurs on
|
| 476 |
* a scrollbar control created by Tk.
|
| 477 |
*
|
| 478 |
* Results:
|
| 479 |
* Standard Windows return value.
|
| 480 |
*
|
| 481 |
* Side effects:
|
| 482 |
* May generate events.
|
| 483 |
*
|
| 484 |
*----------------------------------------------------------------------
|
| 485 |
*/
|
| 486 |
|
| 487 |
static LRESULT CALLBACK
|
| 488 |
ScrollbarProc(hwnd, message, wParam, lParam)
|
| 489 |
HWND hwnd;
|
| 490 |
UINT message;
|
| 491 |
WPARAM wParam;
|
| 492 |
LPARAM lParam;
|
| 493 |
{
|
| 494 |
LRESULT result;
|
| 495 |
POINT point;
|
| 496 |
WinScrollbar *scrollPtr;
|
| 497 |
Tk_Window tkwin = Tk_HWNDToWindow(hwnd);
|
| 498 |
|
| 499 |
if (tkwin == NULL) {
|
| 500 |
panic("ScrollbarProc called on an invalid HWND");
|
| 501 |
}
|
| 502 |
scrollPtr = (WinScrollbar *)((TkWindow*)tkwin)->instanceData;
|
| 503 |
|
| 504 |
switch(message) {
|
| 505 |
case WM_HSCROLL:
|
| 506 |
case WM_VSCROLL: {
|
| 507 |
Tcl_Interp *interp;
|
| 508 |
Tcl_DString cmdString;
|
| 509 |
int command = LOWORD(wParam);
|
| 510 |
int code;
|
| 511 |
|
| 512 |
GetCursorPos(&point);
|
| 513 |
Tk_TranslateWinEvent(NULL, WM_MOUSEMOVE, 0,
|
| 514 |
MAKELPARAM(point.x, point.y), &result);
|
| 515 |
|
| 516 |
if (command == SB_ENDSCROLL) {
|
| 517 |
return 0;
|
| 518 |
}
|
| 519 |
|
| 520 |
/*
|
| 521 |
* Bail out immediately if there isn't a command to invoke.
|
| 522 |
*/
|
| 523 |
|
| 524 |
if (scrollPtr->info.commandSize == 0) {
|
| 525 |
Tcl_ServiceAll();
|
| 526 |
return 0;
|
| 527 |
}
|
| 528 |
|
| 529 |
Tcl_DStringInit(&cmdString);
|
| 530 |
Tcl_DStringAppend(&cmdString, scrollPtr->info.command,
|
| 531 |
scrollPtr->info.commandSize);
|
| 532 |
|
| 533 |
if (command == SB_LINELEFT || command == SB_LINERIGHT) {
|
| 534 |
Tcl_DStringAppendElement(&cmdString, "scroll");
|
| 535 |
Tcl_DStringAppendElement(&cmdString,
|
| 536 |
(command == SB_LINELEFT ) ? "-1" : "1");
|
| 537 |
Tcl_DStringAppendElement(&cmdString, "units");
|
| 538 |
} else if (command == SB_PAGELEFT || command == SB_PAGERIGHT) {
|
| 539 |
Tcl_DStringAppendElement(&cmdString, "scroll");
|
| 540 |
Tcl_DStringAppendElement(&cmdString,
|
| 541 |
(command == SB_PAGELEFT ) ? "-1" : "1");
|
| 542 |
Tcl_DStringAppendElement(&cmdString, "pages");
|
| 543 |
} else {
|
| 544 |
char valueString[TCL_DOUBLE_SPACE];
|
| 545 |
double pos = 0.0;
|
| 546 |
switch (command) {
|
| 547 |
case SB_THUMBPOSITION:
|
| 548 |
pos = ((double)HIWORD(wParam)) / MAX_SCROLL;
|
| 549 |
break;
|
| 550 |
|
| 551 |
case SB_THUMBTRACK:
|
| 552 |
pos = ((double)HIWORD(wParam)) / MAX_SCROLL;
|
| 553 |
break;
|
| 554 |
|
| 555 |
case SB_TOP:
|
| 556 |
pos = 0.0;
|
| 557 |
break;
|
| 558 |
|
| 559 |
case SB_BOTTOM:
|
| 560 |
pos = 1.0;
|
| 561 |
break;
|
| 562 |
}
|
| 563 |
sprintf(valueString, "%g", pos);
|
| 564 |
Tcl_DStringAppendElement(&cmdString, "moveto");
|
| 565 |
Tcl_DStringAppendElement(&cmdString, valueString);
|
| 566 |
}
|
| 567 |
|
| 568 |
interp = scrollPtr->info.interp;
|
| 569 |
code = Tcl_GlobalEval(interp, cmdString.string);
|
| 570 |
if (code != TCL_OK && code != TCL_CONTINUE && code != TCL_BREAK) {
|
| 571 |
Tcl_AddErrorInfo(interp, "\n (scrollbar command)");
|
| 572 |
Tcl_BackgroundError(interp);
|
| 573 |
}
|
| 574 |
Tcl_DStringFree(&cmdString);
|
| 575 |
|
| 576 |
Tcl_ServiceAll();
|
| 577 |
return 0;
|
| 578 |
}
|
| 579 |
|
| 580 |
default:
|
| 581 |
if (Tk_TranslateWinEvent(hwnd, message, wParam, lParam, &result)) {
|
| 582 |
return result;
|
| 583 |
}
|
| 584 |
}
|
| 585 |
return CallWindowProc(scrollPtr->oldProc, hwnd, message, wParam, lParam);
|
| 586 |
}
|
| 587 |
|
| 588 |
/*
|
| 589 |
*----------------------------------------------------------------------
|
| 590 |
*
|
| 591 |
* TkpConfigureScrollbar --
|
| 592 |
*
|
| 593 |
* This procedure is called after the generic code has finished
|
| 594 |
* processing configuration options, in order to configure
|
| 595 |
* platform specific options.
|
| 596 |
*
|
| 597 |
* Results:
|
| 598 |
* None.
|
| 599 |
*
|
| 600 |
* Side effects:
|
| 601 |
* None.
|
| 602 |
*
|
| 603 |
*----------------------------------------------------------------------
|
| 604 |
*/
|
| 605 |
|
| 606 |
void
|
| 607 |
TkpConfigureScrollbar(scrollPtr)
|
| 608 |
register TkScrollbar *scrollPtr; /* Information about widget; may or
|
| 609 |
* may not already have values for
|
| 610 |
* some fields. */
|
| 611 |
{
|
| 612 |
}
|
| 613 |
|
| 614 |
/*
|
| 615 |
*--------------------------------------------------------------
|
| 616 |
*
|
| 617 |
* ScrollbarBindProc --
|
| 618 |
*
|
| 619 |
* This procedure is invoked when the default <ButtonPress>
|
| 620 |
* binding on the Scrollbar bind tag fires.
|
| 621 |
*
|
| 622 |
* Results:
|
| 623 |
* None.
|
| 624 |
*
|
| 625 |
* Side effects:
|
| 626 |
* The event enters a modal loop.
|
| 627 |
*
|
| 628 |
*--------------------------------------------------------------
|
| 629 |
*/
|
| 630 |
|
| 631 |
static int
|
| 632 |
ScrollbarBindProc(clientData, interp, eventPtr, tkwin, keySym)
|
| 633 |
ClientData clientData;
|
| 634 |
Tcl_Interp *interp;
|
| 635 |
XEvent *eventPtr;
|
| 636 |
Tk_Window tkwin;
|
| 637 |
KeySym keySym;
|
| 638 |
{
|
| 639 |
TkWindow *winPtr = (TkWindow*)tkwin;
|
| 640 |
if (eventPtr->type == ButtonPress) {
|
| 641 |
winPtr->flags |= TK_DEFER_MODAL;
|
| 642 |
}
|
| 643 |
return TCL_OK;
|
| 644 |
}
|
| 645 |
|
| 646 |
/*
|
| 647 |
*----------------------------------------------------------------------
|
| 648 |
*
|
| 649 |
* ModalLoopProc --
|
| 650 |
*
|
| 651 |
* This function is invoked at the end of the event processing
|
| 652 |
* whenever the ScrollbarBindProc has been invoked for a ButtonPress
|
| 653 |
* event.
|
| 654 |
*
|
| 655 |
* Results:
|
| 656 |
* None.
|
| 657 |
*
|
| 658 |
* Side effects:
|
| 659 |
* Enters a modal loop.
|
| 660 |
*
|
| 661 |
*----------------------------------------------------------------------
|
| 662 |
*/
|
| 663 |
|
| 664 |
static void
|
| 665 |
ModalLoopProc(tkwin, eventPtr)
|
| 666 |
Tk_Window tkwin;
|
| 667 |
XEvent *eventPtr;
|
| 668 |
{
|
| 669 |
TkWindow *winPtr = (TkWindow*)tkwin;
|
| 670 |
WinScrollbar *scrollPtr = (WinScrollbar *) winPtr->instanceData;
|
| 671 |
int oldMode;
|
| 672 |
|
| 673 |
if (scrollPtr->hwnd) {
|
| 674 |
Tcl_Preserve((ClientData)scrollPtr);
|
| 675 |
scrollPtr->winFlags |= IN_MODAL_LOOP;
|
| 676 |
oldMode = Tcl_SetServiceMode(TCL_SERVICE_ALL);
|
| 677 |
TkWinResendEvent(scrollPtr->oldProc, scrollPtr->hwnd, eventPtr);
|
| 678 |
(void) Tcl_SetServiceMode(oldMode);
|
| 679 |
scrollPtr->winFlags &= ~IN_MODAL_LOOP;
|
| 680 |
if (scrollPtr->hwnd && scrollPtr->winFlags & ALREADY_DEAD) {
|
| 681 |
DestroyWindow(scrollPtr->hwnd);
|
| 682 |
}
|
| 683 |
Tcl_Release((ClientData)scrollPtr);
|
| 684 |
}
|
| 685 |
}
|
| 686 |
|
| 687 |
/*
|
| 688 |
*--------------------------------------------------------------
|
| 689 |
*
|
| 690 |
* TkpScrollbarPosition --
|
| 691 |
*
|
| 692 |
* Determine the scrollbar element corresponding to a
|
| 693 |
* given position.
|
| 694 |
*
|
| 695 |
* Results:
|
| 696 |
* One of TOP_ARROW, TOP_GAP, etc., indicating which element
|
| 697 |
* of the scrollbar covers the position given by (x, y). If
|
| 698 |
* (x,y) is outside the scrollbar entirely, then OUTSIDE is
|
| 699 |
* returned.
|
| 700 |
*
|
| 701 |
* Side effects:
|
| 702 |
* None.
|
| 703 |
*
|
| 704 |
*--------------------------------------------------------------
|
| 705 |
*/
|
| 706 |
|
| 707 |
int
|
| 708 |
TkpScrollbarPosition(scrollPtr, x, y)
|
| 709 |
register TkScrollbar *scrollPtr; /* Scrollbar widget record. */
|
| 710 |
int x, y; /* Coordinates within scrollPtr's
|
| 711 |
* window. */
|
| 712 |
{
|
| 713 |
int length, width, tmp;
|
| 714 |
|
| 715 |
if (scrollPtr->vertical) {
|
| 716 |
length = Tk_Height(scrollPtr->tkwin);
|
| 717 |
width = Tk_Width(scrollPtr->tkwin);
|
| 718 |
} else {
|
| 719 |
tmp = x;
|
| 720 |
x = y;
|
| 721 |
y = tmp;
|
| 722 |
length = Tk_Width(scrollPtr->tkwin);
|
| 723 |
width = Tk_Height(scrollPtr->tkwin);
|
| 724 |
}
|
| 725 |
|
| 726 |
if ((x < scrollPtr->inset) || (x >= (width - scrollPtr->inset))
|
| 727 |
|| (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) {
|
| 728 |
return OUTSIDE;
|
| 729 |
}
|
| 730 |
|
| 731 |
/*
|
| 732 |
* All of the calculations in this procedure mirror those in
|
| 733 |
* TkpDisplayScrollbar. Be sure to keep the two consistent.
|
| 734 |
*/
|
| 735 |
|
| 736 |
if (y < (scrollPtr->inset + scrollPtr->arrowLength)) {
|
| 737 |
return TOP_ARROW;
|
| 738 |
}
|
| 739 |
if (y < scrollPtr->sliderFirst) {
|
| 740 |
return TOP_GAP;
|
| 741 |
}
|
| 742 |
if (y < scrollPtr->sliderLast) {
|
| 743 |
return SLIDER;
|
| 744 |
}
|
| 745 |
if (y >= (length - (scrollPtr->arrowLength + scrollPtr->inset))) {
|
| 746 |
return BOTTOM_ARROW;
|
| 747 |
}
|
| 748 |
return BOTTOM_GAP;
|
| 749 |
}
|
| 750 |
|
| 751 |
|
| 752 |
/* $History: tkWinScrlbr.c $
|
| 753 |
*
|
| 754 |
* ***************** Version 1 *****************
|
| 755 |
* User: Dtashley Date: 1/02/01 Time: 3:19a
|
| 756 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
| 757 |
* Initial check-in.
|
| 758 |
*/
|
| 759 |
|
| 760 |
/* End of TKWINSCRLBR.C */ |
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