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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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* |
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* 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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* 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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} |
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} |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TkpComputeScrollbarGeometry -- |
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* |
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* 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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* displaying the scrollbar. |
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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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* The scrollbar will be displayed differently. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void |
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TkpComputeScrollbarGeometry(scrollPtr) |
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register TkScrollbar *scrollPtr; /* Scrollbar whose geometry may |
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* have changed. */ |
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{ |
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int fieldLength, minThumbSize; |
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/* |
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* Windows doesn't use focus rings on scrollbars, but we still |
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* perform basic sanity checks to appease backwards compatibility. |
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*/ |
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if (scrollPtr->highlightWidth < 0) { |
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scrollPtr->highlightWidth = 0; |
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} |
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if (scrollPtr->vertical) { |
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scrollPtr->arrowLength = vArrowHeight; |
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fieldLength = Tk_Height(scrollPtr->tkwin); |
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minThumbSize = vThumb; |
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} else { |
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scrollPtr->arrowLength = hArrowWidth; |
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fieldLength = Tk_Width(scrollPtr->tkwin); |
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minThumbSize = hThumb; |
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} |
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fieldLength -= 2*scrollPtr->arrowLength; |
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if (fieldLength < 0) { |
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fieldLength = 0; |
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} |
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scrollPtr->sliderFirst = (int) ((double)fieldLength |
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* scrollPtr->firstFraction); |
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scrollPtr->sliderLast = (int) ((double)fieldLength |
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* scrollPtr->lastFraction); |
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/* |
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* Adjust the slider so that some piece of it is always |
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* displayed in the scrollbar and so that it has at least |
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* a minimal width (so it can be grabbed with the mouse). |
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*/ |
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if (scrollPtr->sliderFirst > fieldLength) { |
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scrollPtr->sliderFirst = fieldLength; |
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} |
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if (scrollPtr->sliderFirst < 0) { |
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scrollPtr->sliderFirst = 0; |
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} |
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if (scrollPtr->sliderLast < (scrollPtr->sliderFirst |
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+ minThumbSize)) { |
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scrollPtr->sliderLast = scrollPtr->sliderFirst + minThumbSize; |
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} |
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if (scrollPtr->sliderLast > fieldLength) { |
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scrollPtr->sliderLast = fieldLength; |
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} |
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scrollPtr->sliderFirst += scrollPtr->arrowLength; |
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scrollPtr->sliderLast += scrollPtr->arrowLength; |
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/* |
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* Register the desired geometry for the window (leave enough space |
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* for the two arrows plus a minimum-size slider, plus border around |
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* the whole window, if any). Then arrange for the window to be |
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* redisplayed. |
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*/ |
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if (scrollPtr->vertical) { |
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Tk_GeometryRequest(scrollPtr->tkwin, |
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scrollPtr->width, 2*scrollPtr->arrowLength + minThumbSize); |
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} else { |
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Tk_GeometryRequest(scrollPtr->tkwin, |
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2*scrollPtr->arrowLength + minThumbSize, scrollPtr->width); |
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} |
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Tk_SetInternalBorder(scrollPtr->tkwin, 0); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* ScrollbarProc -- |
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* |
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* This function is call by Windows whenever an event occurs on |
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* a scrollbar control created by Tk. |
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* |
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* Results: |
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* Standard Windows return value. |
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* |
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* Side effects: |
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* May generate events. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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static LRESULT CALLBACK |
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ScrollbarProc(hwnd, message, wParam, lParam) |
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HWND hwnd; |
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UINT message; |
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WPARAM wParam; |
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LPARAM lParam; |
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{ |
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LRESULT result; |
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POINT point; |
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WinScrollbar *scrollPtr; |
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Tk_Window tkwin = Tk_HWNDToWindow(hwnd); |
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if (tkwin == NULL) { |
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panic("ScrollbarProc called on an invalid HWND"); |
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} |
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scrollPtr = (WinScrollbar *)((TkWindow*)tkwin)->instanceData; |
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switch(message) { |
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case WM_HSCROLL: |
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case WM_VSCROLL: { |
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Tcl_Interp *interp; |
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Tcl_DString cmdString; |
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int command = LOWORD(wParam); |
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int code; |
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GetCursorPos(&point); |
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Tk_TranslateWinEvent(NULL, WM_MOUSEMOVE, 0, |
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MAKELPARAM(point.x, point.y), &result); |
|
|
|
|
|
if (command == SB_ENDSCROLL) { |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/* |
|
|
* Bail out immediately if there isn't a command to invoke. |
|
|
*/ |
|
|
|
|
|
if (scrollPtr->info.commandSize == 0) { |
|
|
Tcl_ServiceAll(); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
Tcl_DStringInit(&cmdString); |
|
|
Tcl_DStringAppend(&cmdString, scrollPtr->info.command, |
|
|
scrollPtr->info.commandSize); |
|
|
|
|
|
if (command == SB_LINELEFT || command == SB_LINERIGHT) { |
|
|
Tcl_DStringAppendElement(&cmdString, "scroll"); |
|
|
Tcl_DStringAppendElement(&cmdString, |
|
|
(command == SB_LINELEFT ) ? "-1" : "1"); |
|
|
Tcl_DStringAppendElement(&cmdString, "units"); |
|
|
} else if (command == SB_PAGELEFT || command == SB_PAGERIGHT) { |
|
|
Tcl_DStringAppendElement(&cmdString, "scroll"); |
|
|
Tcl_DStringAppendElement(&cmdString, |
|
|
(command == SB_PAGELEFT ) ? "-1" : "1"); |
|
|
Tcl_DStringAppendElement(&cmdString, "pages"); |
|
|
} else { |
|
|
char valueString[TCL_DOUBLE_SPACE]; |
|
|
double pos = 0.0; |
|
|
switch (command) { |
|
|
case SB_THUMBPOSITION: |
|
|
pos = ((double)HIWORD(wParam)) / MAX_SCROLL; |
|
|
break; |
|
|
|
|
|
case SB_THUMBTRACK: |
|
|
pos = ((double)HIWORD(wParam)) / MAX_SCROLL; |
|
|
break; |
|
|
|
|
|
case SB_TOP: |
|
|
pos = 0.0; |
|
|
break; |
|
|
|
|
|
case SB_BOTTOM: |
|
|
pos = 1.0; |
|
|
break; |
|
|
} |
|
|
sprintf(valueString, "%g", pos); |
|
|
Tcl_DStringAppendElement(&cmdString, "moveto"); |
|
|
Tcl_DStringAppendElement(&cmdString, valueString); |
|
|
} |
|
|
|
|
|
interp = scrollPtr->info.interp; |
|
|
code = Tcl_GlobalEval(interp, cmdString.string); |
|
|
if (code != TCL_OK && code != TCL_CONTINUE && code != TCL_BREAK) { |
|
|
Tcl_AddErrorInfo(interp, "\n (scrollbar command)"); |
|
|
Tcl_BackgroundError(interp); |
|
|
} |
|
|
Tcl_DStringFree(&cmdString); |
|
|
|
|
|
Tcl_ServiceAll(); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
default: |
|
|
if (Tk_TranslateWinEvent(hwnd, message, wParam, lParam, &result)) { |
|
|
return result; |
|
|
} |
|
|
} |
|
|
return CallWindowProc(scrollPtr->oldProc, hwnd, message, wParam, lParam); |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* TkpConfigureScrollbar -- |
|
|
* |
|
|
* This procedure is called after the generic code has finished |
|
|
* processing configuration options, in order to configure |
|
|
* platform specific options. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
void |
|
|
TkpConfigureScrollbar(scrollPtr) |
|
|
register TkScrollbar *scrollPtr; /* Information about widget; may or |
|
|
* may not already have values for |
|
|
* some fields. */ |
|
|
{ |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* ScrollbarBindProc -- |
|
|
* |
|
|
* This procedure is invoked when the default <ButtonPress> |
|
|
* binding on the Scrollbar bind tag fires. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* The event enters a modal loop. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static int |
|
|
ScrollbarBindProc(clientData, interp, eventPtr, tkwin, keySym) |
|
|
ClientData clientData; |
|
|
Tcl_Interp *interp; |
|
|
XEvent *eventPtr; |
|
|
Tk_Window tkwin; |
|
|
KeySym keySym; |
|
|
{ |
|
|
TkWindow *winPtr = (TkWindow*)tkwin; |
|
|
if (eventPtr->type == ButtonPress) { |
|
|
winPtr->flags |= TK_DEFER_MODAL; |
|
|
} |
|
|
return TCL_OK; |
|
|
} |
|
|
|
|
|
/* |
|
|
*---------------------------------------------------------------------- |
|
|
* |
|
|
* ModalLoopProc -- |
|
|
* |
|
|
* This function is invoked at the end of the event processing |
|
|
* whenever the ScrollbarBindProc has been invoked for a ButtonPress |
|
|
* event. |
|
|
* |
|
|
* Results: |
|
|
* None. |
|
|
* |
|
|
* Side effects: |
|
|
* Enters a modal loop. |
|
|
* |
|
|
*---------------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
static void |
|
|
ModalLoopProc(tkwin, eventPtr) |
|
|
Tk_Window tkwin; |
|
|
XEvent *eventPtr; |
|
|
{ |
|
|
TkWindow *winPtr = (TkWindow*)tkwin; |
|
|
WinScrollbar *scrollPtr = (WinScrollbar *) winPtr->instanceData; |
|
|
int oldMode; |
|
|
|
|
|
if (scrollPtr->hwnd) { |
|
|
Tcl_Preserve((ClientData)scrollPtr); |
|
|
scrollPtr->winFlags |= IN_MODAL_LOOP; |
|
|
oldMode = Tcl_SetServiceMode(TCL_SERVICE_ALL); |
|
|
TkWinResendEvent(scrollPtr->oldProc, scrollPtr->hwnd, eventPtr); |
|
|
(void) Tcl_SetServiceMode(oldMode); |
|
|
scrollPtr->winFlags &= ~IN_MODAL_LOOP; |
|
|
if (scrollPtr->hwnd && scrollPtr->winFlags & ALREADY_DEAD) { |
|
|
DestroyWindow(scrollPtr->hwnd); |
|
|
} |
|
|
Tcl_Release((ClientData)scrollPtr); |
|
|
} |
|
|
} |
|
|
|
|
|
/* |
|
|
*-------------------------------------------------------------- |
|
|
* |
|
|
* TkpScrollbarPosition -- |
|
|
* |
|
|
* Determine the scrollbar element corresponding to a |
|
|
* given position. |
|
|
* |
|
|
* Results: |
|
|
* One of TOP_ARROW, TOP_GAP, etc., indicating which element |
|
|
* of the scrollbar covers the position given by (x, y). If |
|
|
* (x,y) is outside the scrollbar entirely, then OUTSIDE is |
|
|
* returned. |
|
|
* |
|
|
* Side effects: |
|
|
* None. |
|
|
* |
|
|
*-------------------------------------------------------------- |
|
|
*/ |
|
|
|
|
|
int |
|
|
TkpScrollbarPosition(scrollPtr, x, y) |
|
|
register TkScrollbar *scrollPtr; /* Scrollbar widget record. */ |
|
|
int x, y; /* Coordinates within scrollPtr's |
|
|
* window. */ |
|
|
{ |
|
|
int length, width, tmp; |
|
|
|
|
|
if (scrollPtr->vertical) { |
|
|
length = Tk_Height(scrollPtr->tkwin); |
|
|
width = Tk_Width(scrollPtr->tkwin); |
|
|
} else { |
|
|
tmp = x; |
|
|
x = y; |
|
|
y = tmp; |
|
|
length = Tk_Width(scrollPtr->tkwin); |
|
|
width = Tk_Height(scrollPtr->tkwin); |
|
|
} |
|
|
|
|
|
if ((x < scrollPtr->inset) || (x >= (width - scrollPtr->inset)) |
|
|
|| (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) { |
|
|
return OUTSIDE; |
|
|
} |
|
|
|
|
|
/* |
|
|
* All of the calculations in this procedure mirror those in |
|
|
* TkpDisplayScrollbar. Be sure to keep the two consistent. |
|
|
*/ |
|
|
|
|
|
if (y < (scrollPtr->inset + scrollPtr->arrowLength)) { |
|
|
return TOP_ARROW; |
|
|
} |
|
|
if (y < scrollPtr->sliderFirst) { |
|
|
return TOP_GAP; |
|
|
} |
|
|
if (y < scrollPtr->sliderLast) { |
|
|
return SLIDER; |
|
|
} |
|
|
if (y >= (length - (scrollPtr->arrowLength + scrollPtr->inset))) { |
|
|
return BOTTOM_ARROW; |
|
|
} |
|
|
return BOTTOM_GAP; |
|
|
} |
|
|
|
|
|
|
|
|
/* $History: tkWinScrlbr.c $ |
|
|
* |
|
|
* ***************** Version 1 ***************** |
|
|
* User: Dtashley Date: 1/02/01 Time: 3:19a |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tk Base |
|
|
* Initial check-in. |
|
|
*/ |
|
|
|
|
|
/* End of TKWINSCRLBR.C */ |
|
| 1 |
|
/* $Header$ */ |
| 2 |
|
|
| 3 |
|
/* |
| 4 |
|
* tkWinScrollbar.c -- |
| 5 |
|
* |
| 6 |
|
* This file implements the Windows specific portion of the scrollbar |
| 7 |
|
* widget. |
| 8 |
|
* |
| 9 |
|
* Copyright (c) 1996 by Sun Microsystems, Inc. |
| 10 |
|
* |
| 11 |
|
* See the file "license.terms" for information on usage and redistribution |
| 12 |
|
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 13 |
|
* |
| 14 |
|
* RCS: @(#) $Id: tkwinscrlbr.c,v 1.1.1.1 2001/06/13 05:14:22 dtashley Exp $ |
| 15 |
|
*/ |
| 16 |
|
|
| 17 |
|
#include "tkWinInt.h" |
| 18 |
|
#include "tkScrollbar.h" |
| 19 |
|
|
| 20 |
|
|
| 21 |
|
/* |
| 22 |
|
* The following constant is used to specify the maximum scroll position. |
| 23 |
|
* This value is limited by the Win32 API to either 16-bits or 32-bits, |
| 24 |
|
* depending on the context. For now we'll just use a value small |
| 25 |
|
* enough to fit in 16-bits, but which gives us 4-digits of precision. |
| 26 |
|
*/ |
| 27 |
|
|
| 28 |
|
#define MAX_SCROLL 10000 |
| 29 |
|
|
| 30 |
|
/* |
| 31 |
|
* Declaration of Windows specific scrollbar structure. |
| 32 |
|
*/ |
| 33 |
|
|
| 34 |
|
typedef struct WinScrollbar { |
| 35 |
|
TkScrollbar info; /* Generic scrollbar info. */ |
| 36 |
|
WNDPROC oldProc; /* Old window procedure. */ |
| 37 |
|
int lastVertical; /* 1 if was vertical at last refresh. */ |
| 38 |
|
HWND hwnd; /* Current window handle. */ |
| 39 |
|
int winFlags; /* Various flags; see below. */ |
| 40 |
|
} WinScrollbar; |
| 41 |
|
|
| 42 |
|
/* |
| 43 |
|
* Flag bits for native scrollbars: |
| 44 |
|
* |
| 45 |
|
* IN_MODAL_LOOP: Non-zero means this scrollbar is in the middle |
| 46 |
|
* of a modal loop. |
| 47 |
|
* ALREADY_DEAD: Non-zero means this scrollbar has been |
| 48 |
|
* destroyed, but has not been cleaned up. |
| 49 |
|
*/ |
| 50 |
|
|
| 51 |
|
#define IN_MODAL_LOOP 1 |
| 52 |
|
#define ALREADY_DEAD 2 |
| 53 |
|
|
| 54 |
|
/* |
| 55 |
|
* Cached system metrics used to determine scrollbar geometry. |
| 56 |
|
*/ |
| 57 |
|
|
| 58 |
|
static int initialized = 0; |
| 59 |
|
static int hArrowWidth, hThumb; /* Horizontal control metrics. */ |
| 60 |
|
static int vArrowWidth, vArrowHeight, vThumb; /* Vertical control metrics. */ |
| 61 |
|
|
| 62 |
|
TCL_DECLARE_MUTEX(winScrlbrMutex) |
| 63 |
|
|
| 64 |
|
/* |
| 65 |
|
* This variable holds the default width for a scrollbar in string |
| 66 |
|
* form for use in a Tk_ConfigSpec. |
| 67 |
|
*/ |
| 68 |
|
|
| 69 |
|
static char defWidth[TCL_INTEGER_SPACE]; |
| 70 |
|
|
| 71 |
|
/* |
| 72 |
|
* Declarations for functions defined in this file. |
| 73 |
|
*/ |
| 74 |
|
|
| 75 |
|
static Window CreateProc _ANSI_ARGS_((Tk_Window tkwin, |
| 76 |
|
Window parent, ClientData instanceData)); |
| 77 |
|
static void ModalLoopProc _ANSI_ARGS_((Tk_Window tkwin, |
| 78 |
|
XEvent *eventPtr)); |
| 79 |
|
static int ScrollbarBindProc _ANSI_ARGS_((ClientData clientData, |
| 80 |
|
Tcl_Interp *interp, XEvent *eventPtr, |
| 81 |
|
Tk_Window tkwin, KeySym keySym)); |
| 82 |
|
static LRESULT CALLBACK ScrollbarProc _ANSI_ARGS_((HWND hwnd, UINT message, |
| 83 |
|
WPARAM wParam, LPARAM lParam)); |
| 84 |
|
static void UpdateScrollbar _ANSI_ARGS_(( |
| 85 |
|
WinScrollbar *scrollPtr)); |
| 86 |
|
static void UpdateScrollbarMetrics _ANSI_ARGS_((void)); |
| 87 |
|
|
| 88 |
|
/* |
| 89 |
|
* The class procedure table for the scrollbar widget. |
| 90 |
|
*/ |
| 91 |
|
|
| 92 |
|
TkClassProcs tkpScrollbarProcs = { |
| 93 |
|
CreateProc, /* createProc */ |
| 94 |
|
NULL, /* geometryProc */ |
| 95 |
|
ModalLoopProc, /* modalProc */ |
| 96 |
|
}; |
| 97 |
|
|
| 98 |
|
|
| 99 |
|
/* |
| 100 |
|
*---------------------------------------------------------------------- |
| 101 |
|
* |
| 102 |
|
* TkpCreateScrollbar -- |
| 103 |
|
* |
| 104 |
|
* Allocate a new TkScrollbar structure. |
| 105 |
|
* |
| 106 |
|
* Results: |
| 107 |
|
* Returns a newly allocated TkScrollbar structure. |
| 108 |
|
* |
| 109 |
|
* Side effects: |
| 110 |
|
* Registers an event handler for the widget. |
| 111 |
|
* |
| 112 |
|
*---------------------------------------------------------------------- |
| 113 |
|
*/ |
| 114 |
|
|
| 115 |
|
TkScrollbar * |
| 116 |
|
TkpCreateScrollbar(tkwin) |
| 117 |
|
Tk_Window tkwin; |
| 118 |
|
{ |
| 119 |
|
WinScrollbar *scrollPtr; |
| 120 |
|
TkWindow *winPtr = (TkWindow *)tkwin; |
| 121 |
|
|
| 122 |
|
if (!initialized) { |
| 123 |
|
Tcl_MutexLock(&winScrlbrMutex); |
| 124 |
|
UpdateScrollbarMetrics(); |
| 125 |
|
initialized = 1; |
| 126 |
|
Tcl_MutexUnlock(&winScrlbrMutex); |
| 127 |
|
} |
| 128 |
|
|
| 129 |
|
scrollPtr = (WinScrollbar *) ckalloc(sizeof(WinScrollbar)); |
| 130 |
|
scrollPtr->winFlags = 0; |
| 131 |
|
scrollPtr->hwnd = NULL; |
| 132 |
|
|
| 133 |
|
Tk_CreateEventHandler(tkwin, |
| 134 |
|
ExposureMask|StructureNotifyMask|FocusChangeMask, |
| 135 |
|
TkScrollbarEventProc, (ClientData) scrollPtr); |
| 136 |
|
|
| 137 |
|
if (!Tcl_GetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL)) { |
| 138 |
|
Tcl_SetAssocData(winPtr->mainPtr->interp, "TkScrollbar", NULL, |
| 139 |
|
(ClientData)1); |
| 140 |
|
TkCreateBindingProcedure(winPtr->mainPtr->interp, |
| 141 |
|
winPtr->mainPtr->bindingTable, |
| 142 |
|
(ClientData)Tk_GetUid("Scrollbar"), "<ButtonPress>", |
| 143 |
|
ScrollbarBindProc, NULL, NULL); |
| 144 |
|
} |
| 145 |
|
|
| 146 |
|
return (TkScrollbar*) scrollPtr; |
| 147 |
|
} |
| 148 |
|
|
| 149 |
|
/* |
| 150 |
|
*---------------------------------------------------------------------- |
| 151 |
|
* |
| 152 |
|
* UpdateScrollbar -- |
| 153 |
|
* |
| 154 |
|
* This function updates the position and size of the scrollbar |
| 155 |
|
* thumb based on the current settings. |
| 156 |
|
* |
| 157 |
|
* Results: |
| 158 |
|
* None. |
| 159 |
|
* |
| 160 |
|
* Side effects: |
| 161 |
|
* Moves the thumb. |
| 162 |
|
* |
| 163 |
|
*---------------------------------------------------------------------- |
| 164 |
|
*/ |
| 165 |
|
|
| 166 |
|
static void |
| 167 |
|
UpdateScrollbar(scrollPtr) |
| 168 |
|
WinScrollbar *scrollPtr; |
| 169 |
|
{ |
| 170 |
|
SCROLLINFO scrollInfo; |
| 171 |
|
double thumbSize; |
| 172 |
|
|
| 173 |
|
/* |
| 174 |
|
* Update the current scrollbar position and shape. |
| 175 |
|
*/ |
| 176 |
|
|
| 177 |
|
scrollInfo.fMask = SIF_PAGE | SIF_POS | SIF_RANGE; |
| 178 |
|
scrollInfo.cbSize = sizeof(scrollInfo); |
| 179 |
|
scrollInfo.nMin = 0; |
| 180 |
|
scrollInfo.nMax = MAX_SCROLL; |
| 181 |
|
thumbSize = (scrollPtr->info.lastFraction - scrollPtr->info.firstFraction); |
| 182 |
|
scrollInfo.nPage = ((UINT) (thumbSize * (double) MAX_SCROLL)) + 1; |
| 183 |
|
if (thumbSize < 1.0) { |
| 184 |
|
scrollInfo.nPos = (int) |
| 185 |
|
((scrollPtr->info.firstFraction / (1.0-thumbSize)) |
| 186 |
|
* (MAX_SCROLL - (scrollInfo.nPage - 1))); |
| 187 |
|
} else { |
| 188 |
|
scrollInfo.nPos = 0; |
| 189 |
|
} |
| 190 |
|
SetScrollInfo(scrollPtr->hwnd, SB_CTL, &scrollInfo, TRUE); |
| 191 |
|
} |
| 192 |
|
|
| 193 |
|
/* |
| 194 |
|
*---------------------------------------------------------------------- |
| 195 |
|
* |
| 196 |
|
* CreateProc -- |
| 197 |
|
* |
| 198 |
|
* This function creates a new Scrollbar control, subclasses |
| 199 |
|
* the instance, and generates a new Window object. |
| 200 |
|
* |
| 201 |
|
* Results: |
| 202 |
|
* Returns the newly allocated Window object, or None on failure. |
| 203 |
|
* |
| 204 |
|
* Side effects: |
| 205 |
|
* Causes a new Scrollbar control to come into existence. |
| 206 |
|
* |
| 207 |
|
*---------------------------------------------------------------------- |
| 208 |
|
*/ |
| 209 |
|
|
| 210 |
|
static Window |
| 211 |
|
CreateProc(tkwin, parentWin, instanceData) |
| 212 |
|
Tk_Window tkwin; /* Token for window. */ |
| 213 |
|
Window parentWin; /* Parent of new window. */ |
| 214 |
|
ClientData instanceData; /* Scrollbar instance data. */ |
| 215 |
|
{ |
| 216 |
|
DWORD style; |
| 217 |
|
Window window; |
| 218 |
|
HWND parent; |
| 219 |
|
TkWindow *winPtr; |
| 220 |
|
WinScrollbar *scrollPtr = (WinScrollbar *)instanceData; |
| 221 |
|
|
| 222 |
|
parent = Tk_GetHWND(parentWin); |
| 223 |
|
|
| 224 |
|
if (scrollPtr->info.vertical) { |
| 225 |
|
style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS |
| 226 |
|
| SBS_VERT | SBS_RIGHTALIGN; |
| 227 |
|
} else { |
| 228 |
|
style = WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS |
| 229 |
|
| SBS_HORZ | SBS_BOTTOMALIGN; |
| 230 |
|
} |
| 231 |
|
|
| 232 |
|
scrollPtr->hwnd = CreateWindow("SCROLLBAR", NULL, style, |
| 233 |
|
Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin), |
| 234 |
|
parent, NULL, Tk_GetHINSTANCE(), NULL); |
| 235 |
|
|
| 236 |
|
/* |
| 237 |
|
* Ensure new window is inserted into the stacking order at the correct |
| 238 |
|
* place. |
| 239 |
|
*/ |
| 240 |
|
|
| 241 |
|
SetWindowPos(scrollPtr->hwnd, HWND_TOP, 0, 0, 0, 0, |
| 242 |
|
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE); |
| 243 |
|
|
| 244 |
|
for (winPtr = ((TkWindow*)tkwin)->nextPtr; winPtr != NULL; |
| 245 |
|
winPtr = winPtr->nextPtr) { |
| 246 |
|
if ((winPtr->window != None) && !(winPtr->flags & TK_TOP_LEVEL)) { |
| 247 |
|
TkWinSetWindowPos(scrollPtr->hwnd, Tk_GetHWND(winPtr->window), |
| 248 |
|
Below); |
| 249 |
|
break; |
| 250 |
|
} |
| 251 |
|
} |
| 252 |
|
|
| 253 |
|
scrollPtr->lastVertical = scrollPtr->info.vertical; |
| 254 |
|
scrollPtr->oldProc = (WNDPROC)SetWindowLong(scrollPtr->hwnd, GWL_WNDPROC, |
| 255 |
|
(DWORD) ScrollbarProc); |
| 256 |
|
window = Tk_AttachHWND(tkwin, scrollPtr->hwnd); |
| 257 |
|
|
| 258 |
|
UpdateScrollbar(scrollPtr); |
| 259 |
|
return window; |
| 260 |
|
} |
| 261 |
|
|
| 262 |
|
/* |
| 263 |
|
*-------------------------------------------------------------- |
| 264 |
|
* |
| 265 |
|
* TkpDisplayScrollbar -- |
| 266 |
|
* |
| 267 |
|
* This procedure redraws the contents of a scrollbar window. |
| 268 |
|
* It is invoked as a do-when-idle handler, so it only runs |
| 269 |
|
* when there's nothing else for the application to do. |
| 270 |
|
* |
| 271 |
|
* Results: |
| 272 |
|
* None. |
| 273 |
|
* |
| 274 |
|
* Side effects: |
| 275 |
|
* Information appears on the screen. |
| 276 |
|
* |
| 277 |
|
*-------------------------------------------------------------- |
| 278 |
|
*/ |
| 279 |
|
|
| 280 |
|
void |
| 281 |
|
TkpDisplayScrollbar(clientData) |
| 282 |
|
ClientData clientData; /* Information about window. */ |
| 283 |
|
{ |
| 284 |
|
WinScrollbar *scrollPtr = (WinScrollbar *) clientData; |
| 285 |
|
Tk_Window tkwin = scrollPtr->info.tkwin; |
| 286 |
|
|
| 287 |
|
scrollPtr->info.flags &= ~REDRAW_PENDING; |
| 288 |
|
if ((tkwin == NULL) || !Tk_IsMapped(tkwin)) { |
| 289 |
|
return; |
| 290 |
|
} |
| 291 |
|
|
| 292 |
|
/* |
| 293 |
|
* Destroy and recreate the scrollbar control if the orientation |
| 294 |
|
* has changed. |
| 295 |
|
*/ |
| 296 |
|
|
| 297 |
|
if (scrollPtr->lastVertical != scrollPtr->info.vertical) { |
| 298 |
|
HWND hwnd = Tk_GetHWND(Tk_WindowId(tkwin)); |
| 299 |
|
|
| 300 |
|
SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) scrollPtr->oldProc); |
| 301 |
|
DestroyWindow(hwnd); |
| 302 |
|
|
| 303 |
|
CreateProc(tkwin, Tk_WindowId(Tk_Parent(tkwin)), |
| 304 |
|
(ClientData) scrollPtr); |
| 305 |
|
} else { |
| 306 |
|
UpdateScrollbar(scrollPtr); |
| 307 |
|
} |
| 308 |
|
} |
| 309 |
|
|
| 310 |
|
/* |
| 311 |
|
*---------------------------------------------------------------------- |
| 312 |
|
* |
| 313 |
|
* TkpDestroyScrollbar -- |
| 314 |
|
* |
| 315 |
|
* Free data structures associated with the scrollbar control. |
| 316 |
|
* |
| 317 |
|
* Results: |
| 318 |
|
* None. |
| 319 |
|
* |
| 320 |
|
* Side effects: |
| 321 |
|
* Restores the default control state. |
| 322 |
|
* |
| 323 |
|
*---------------------------------------------------------------------- |
| 324 |
|
*/ |
| 325 |
|
|
| 326 |
|
void |
| 327 |
|
TkpDestroyScrollbar(scrollPtr) |
| 328 |
|
TkScrollbar *scrollPtr; |
| 329 |
|
{ |
| 330 |
|
WinScrollbar *winScrollPtr = (WinScrollbar *)scrollPtr; |
| 331 |
|
HWND hwnd = winScrollPtr->hwnd; |
| 332 |
|
if (hwnd) { |
| 333 |
|
SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) winScrollPtr->oldProc); |
| 334 |
|
if (winScrollPtr->winFlags & IN_MODAL_LOOP) { |
| 335 |
|
((TkWindow *)scrollPtr->tkwin)->flags |= TK_DONT_DESTROY_WINDOW; |
| 336 |
|
SetParent(hwnd, NULL); |
| 337 |
|
} |
| 338 |
|
} |
| 339 |
|
winScrollPtr->winFlags |= ALREADY_DEAD; |
| 340 |
|
} |
| 341 |
|
|
| 342 |
|
/* |
| 343 |
|
*---------------------------------------------------------------------- |
| 344 |
|
* |
| 345 |
|
* UpdateScrollbarMetrics -- |
| 346 |
|
* |
| 347 |
|
* This function retrieves the current system metrics for a |
| 348 |
|
* scrollbar. |
| 349 |
|
* |
| 350 |
|
* Results: |
| 351 |
|
* None. |
| 352 |
|
* |
| 353 |
|
* Side effects: |
| 354 |
|
* Updates the geometry cache info for all scrollbars. |
| 355 |
|
* |
| 356 |
|
*---------------------------------------------------------------------- |
| 357 |
|
*/ |
| 358 |
|
|
| 359 |
|
void |
| 360 |
|
UpdateScrollbarMetrics() |
| 361 |
|
{ |
| 362 |
|
Tk_ConfigSpec *specPtr; |
| 363 |
|
|
| 364 |
|
hArrowWidth = GetSystemMetrics(SM_CXHSCROLL); |
| 365 |
|
hThumb = GetSystemMetrics(SM_CXHTHUMB); |
| 366 |
|
vArrowWidth = GetSystemMetrics(SM_CXVSCROLL); |
| 367 |
|
vArrowHeight = GetSystemMetrics(SM_CYVSCROLL); |
| 368 |
|
vThumb = GetSystemMetrics(SM_CYVTHUMB); |
| 369 |
|
|
| 370 |
|
sprintf(defWidth, "%d", vArrowWidth); |
| 371 |
|
for (specPtr = tkpScrollbarConfigSpecs; specPtr->type != TK_CONFIG_END; |
| 372 |
|
specPtr++) { |
| 373 |
|
if (specPtr->offset == Tk_Offset(TkScrollbar, width)) { |
| 374 |
|
specPtr->defValue = defWidth; |
| 375 |
|
} |
| 376 |
|
} |
| 377 |
|
} |
| 378 |
|
|
| 379 |
|
/* |
| 380 |
|
*---------------------------------------------------------------------- |
| 381 |
|
* |
| 382 |
|
* TkpComputeScrollbarGeometry -- |
| 383 |
|
* |
| 384 |
|
* After changes in a scrollbar's size or configuration, this |
| 385 |
|
* procedure recomputes various geometry information used in |
| 386 |
|
* displaying the scrollbar. |
| 387 |
|
* |
| 388 |
|
* Results: |
| 389 |
|
* None. |
| 390 |
|
* |
| 391 |
|
* Side effects: |
| 392 |
|
* The scrollbar will be displayed differently. |
| 393 |
|
* |
| 394 |
|
*---------------------------------------------------------------------- |
| 395 |
|
*/ |
| 396 |
|
|
| 397 |
|
void |
| 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 { |
| 418 |
|
scrollPtr->arrowLength = hArrowWidth; |
| 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 |
|
/* End of tkwinscrlbr.c */ |
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