archie/tk4.2/mac/tkMacScrollbar.c
2024-05-27 16:40:40 +02:00

1611 lines
51 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* tkMacScrollbar.c --
*
* This module implements the native Macintosh scrollbar widget
* for the Tk toolkit. A scrollbar displays a slider and two
* arrows; mouse clicks on features within the scrollbar cause
* scrolling commands to be invoked.
*
* Copyright (c) 1995-1996 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* SCCS: @(#) tkMacScrollbar.c 1.11 96/09/05 13:39:45
*/
#include "tkPort.h"
#include "default.h"
#include "tkInt.h"
#include <Controls.h>
#include "tkMacInt.h"
/*
* The following definitions should really be in MacOS
* header files. They are included here as this is the only
* file that needs the declarations.
*/
typedef pascal void (*ThumbActionFunc)(void);
#if GENERATINGCFM
typedef UniversalProcPtr ThumbActionUPP;
#else
typedef ThumbActionFunc ThumbActionUPP;
#endif
enum {
uppThumbActionProcInfo = kPascalStackBased
};
#if GENERATINGCFM
#define NewThumbActionProc(userRoutine) \
(ThumbActionUPP) NewRoutineDescriptor((ProcPtr)(userRoutine), uppThumbActionProcInfo, GetCurrentArchitecture())
#else
#define NewThumbActionProc(userRoutine) \
((ThumbActionUPP) (userRoutine))
#endif
/*
* Change defines for Mac look & feel.
* TODO: should be moved to tkDefaults.h
*/
#undef DEF_SCROLLBAR_WIDTH
#define DEF_SCROLLBAR_WIDTH "15"
#undef DEF_SCROLLBAR_RELIEF
#define DEF_SCROLLBAR_RELIEF "flat"
#undef DEF_SCROLLBAR_BORDER_WIDTH
#define DEF_SCROLLBAR_BORDER_WIDTH "0"
#undef DEF_SCROLLBAR_HIGHLIGHT_WIDTH
#define DEF_SCROLLBAR_HIGHLIGHT_WIDTH "0"
/*
* A data structure of the following type is kept for each scrollbar
* widget managed by this file:
*/
typedef struct {
Tk_Window tkwin; /* Window that embodies the scrollbar. NULL
* means that the window has been destroyed
* but the data structures haven't yet been
* cleaned up.*/
Display *display; /* Display containing widget. Used, among
* other things, so that resources can be
* freed even after tkwin has gone away. */
Tcl_Interp *interp; /* Interpreter associated with scrollbar. */
Tcl_Command widgetCmd; /* Token for scrollbar's widget command. */
Tk_Uid orientUid; /* Orientation for window ("vertical" or
* "horizontal"). */
int vertical; /* Non-zero means vertical orientation
* requested, zero means horizontal. */
int width; /* Desired narrow dimension of scrollbar,
* in pixels. */
char *command; /* Command prefix to use when invoking
* scrolling commands. NULL means don't
* invoke commands. Malloc'ed. */
int commandSize; /* Number of non-NULL bytes in command. */
int repeatDelay; /* How long to wait before auto-repeating
* on scrolling actions (in ms). */
int repeatInterval; /* Interval between autorepeats (in ms). */
int jump; /* Value of -jump option. */
/*
* Information used when displaying widget:
*/
int borderWidth; /* Width of 3-D borders. */
Tk_3DBorder bgBorder; /* Used for drawing background (all flat
* surfaces except for trough). */
Tk_3DBorder activeBorder; /* For drawing backgrounds when active (i.e.
* when mouse is positioned over element). */
XColor *troughColorPtr; /* Color for drawing trough. */
GC troughGC; /* For drawing trough. */
GC copyGC; /* Used for copying from pixmap onto screen. */
int relief; /* Indicates whether window as a whole is
* raised, sunken, or flat. */
int highlightWidth; /* Width in pixels of highlight to draw
* around widget when it has the focus.
* <= 0 means don't draw a highlight. */
XColor *highlightBgColorPtr;
/* Color for drawing traversal highlight
* area when highlight is off. */
XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
int inset; /* Total width of all borders, including
* traversal highlight and 3-D border.
* Indicates how much interior stuff must
* be offset from outside edges to leave
* room for borders. */
int elementBorderWidth; /* Width of border to draw around elements
* inside scrollbar (arrows and slider).
* -1 means use borderWidth. */
int arrowLength; /* Length of arrows along long dimension of
* scrollbar, including space for a small gap
* between the arrow and the slider.
* Recomputed on window size changes. */
int sliderFirst; /* Pixel coordinate of top or left edge
* of slider area, including border. */
int sliderLast; /* Coordinate of pixel just after bottom
* or right edge of slider area, including
* border. */
int activeField; /* Names field to be displayed in active
* colors, such as TOP_ARROW, or 0 for
* no field. */
int activeRelief; /* Value of -activeRelief option: relief
* to use for active element. */
/*
* Information describing the application related to the scrollbar.
* This information is provided by the application by invoking the
* "set" widget command. This information can now be provided in
* two ways: the "old" form (totalUnits, windowUnits, firstUnit,
* and lastUnit), or the "new" form (firstFraction and lastFraction).
* FirstFraction and lastFraction will always be valid, but
* the old-style information is only valid if the NEW_STYLE_COMMANDS
* flag is 0.
*/
int totalUnits; /* Total dimension of application, in
* units. Valid only if the NEW_STYLE_COMMANDS
* flag isn't set. */
int windowUnits; /* Maximum number of units that can be
* displayed in the window at once. Valid
* only if the NEW_STYLE_COMMANDS flag isn't
* set. */
int firstUnit; /* Number of last unit visible in
* application's window. Valid only if the
* NEW_STYLE_COMMANDS flag isn't set. */
int lastUnit; /* Index of last unit visible in window.
* Valid only if the NEW_STYLE_COMMANDS
* flag isn't set. */
double firstFraction; /* Position of first visible thing in window,
* specified as a fraction between 0 and
* 1.0. */
double lastFraction; /* Position of last visible thing in window,
* specified as a fraction between 0 and
* 1.0. */
/*
* Miscellaneous information:
*/
Tk_Cursor cursor; /* Current cursor for window, or None. */
char *takeFocus; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
Tk_TimerToken autoRepeat; /* Token for auto-repeat that's
* currently in progress. NULL means no
* auto-repeat in progress. */
int flags; /* Various flags; see below for
* definitions. */
/*
* Mac specific fields.
*/
ControlRef sbHandle; /* Handle to the Scrollbar control struct. */
} Scrollbar;
/*
* Legal values for "activeField" field of Scrollbar structures. These
* are also the return values from the ScrollbarPosition procedure.
*/
#define OUTSIDE 0
#define TOP_ARROW 1
#define TOP_GAP 2
#define SLIDER 3
#define BOTTOM_GAP 4
#define BOTTOM_ARROW 5
/*
* Flag bits for scrollbars:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* NEW_STYLE_COMMANDS: Non-zero means the new style of commands
* should be used to communicate with the
* widget: ".t yview scroll 2 lines", instead
* of ".t yview 40", for example.
* GOT_FOCUS: Non-zero means this window has the input
* focus.
* SCROLLBAR_GROW: Non-zero means this window draws the grow
* region for the toplevel window. Mac only.
* ACTIVE: Non-zero means this window is currently
* active (in the foreground). Mac only.
*/
#define REDRAW_PENDING 1
#define NEW_STYLE_COMMANDS 2
#define GOT_FOCUS 4
#define SCROLLBAR_GROW 8
#define ACTIVE 16
/*
* Minimum slider length, in pixels (designed to make sure that the slider
* is always easy to grab with the mouse).
*/
#define MIN_SLIDER_LENGTH 5
/*
* Information used for argv parsing.
*/
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_SCROLLBAR_ACTIVE_BG_COLOR, Tk_Offset(Scrollbar, activeBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
DEF_SCROLLBAR_ACTIVE_BG_MONO, Tk_Offset(Scrollbar, activeBorder),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_RELIEF, "-activerelief", "activeRelief", "Relief",
DEF_SCROLLBAR_ACTIVE_RELIEF, Tk_Offset(Scrollbar, activeRelief), 0},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_SCROLLBAR_BG_COLOR, Tk_Offset(Scrollbar, bgBorder),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_BORDER, "-background", "background", "Background",
DEF_SCROLLBAR_BG_MONO, Tk_Offset(Scrollbar, bgBorder),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_SCROLLBAR_BORDER_WIDTH, Tk_Offset(Scrollbar, borderWidth), 0},
{TK_CONFIG_STRING, "-command", "command", "Command",
DEF_SCROLLBAR_COMMAND, Tk_Offset(Scrollbar, command),
TK_CONFIG_NULL_OK},
{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
DEF_SCROLLBAR_CURSOR, Tk_Offset(Scrollbar, cursor), TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-elementborderwidth", "elementBorderWidth",
"BorderWidth", DEF_SCROLLBAR_EL_BORDER_WIDTH,
Tk_Offset(Scrollbar, elementBorderWidth), 0},
{TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
"HighlightBackground", DEF_SCROLLBAR_HIGHLIGHT_BG,
Tk_Offset(Scrollbar, highlightBgColorPtr), 0},
{TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
DEF_SCROLLBAR_HIGHLIGHT,
Tk_Offset(Scrollbar, highlightColorPtr), 0},
{TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
"HighlightThickness",
DEF_SCROLLBAR_HIGHLIGHT_WIDTH, Tk_Offset(Scrollbar, highlightWidth), 0},
{TK_CONFIG_BOOLEAN, "-jump", "jump", "Jump",
DEF_SCROLLBAR_JUMP, Tk_Offset(Scrollbar, jump), 0},
{TK_CONFIG_UID, "-orient", "orient", "Orient",
DEF_SCROLLBAR_ORIENT, Tk_Offset(Scrollbar, orientUid), 0},
{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
DEF_SCROLLBAR_RELIEF, Tk_Offset(Scrollbar, relief), 0},
{TK_CONFIG_INT, "-repeatdelay", "repeatDelay", "RepeatDelay",
DEF_SCROLLBAR_REPEAT_DELAY, Tk_Offset(Scrollbar, repeatDelay), 0},
{TK_CONFIG_INT, "-repeatinterval", "repeatInterval", "RepeatInterval",
DEF_SCROLLBAR_REPEAT_INTERVAL, Tk_Offset(Scrollbar, repeatInterval), 0},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_SCROLLBAR_TAKE_FOCUS, Tk_Offset(Scrollbar, takeFocus),
TK_CONFIG_NULL_OK},
{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
DEF_SCROLLBAR_TROUGH_COLOR, Tk_Offset(Scrollbar, troughColorPtr),
TK_CONFIG_COLOR_ONLY},
{TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
DEF_SCROLLBAR_TROUGH_MONO, Tk_Offset(Scrollbar, troughColorPtr),
TK_CONFIG_MONO_ONLY},
{TK_CONFIG_PIXELS, "-width", "width", "Width",
DEF_SCROLLBAR_WIDTH, Tk_Offset(Scrollbar, width), 0},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Forward declarations for procedures defined later in this file:
*/
static void ComputeScrollbarGeometry _ANSI_ARGS_((
Scrollbar *scrollPtr));
static int ConfigureScrollbar _ANSI_ARGS_((Tcl_Interp *interp,
Scrollbar *scrollPtr, int argc, char **argv,
int flags));
static void DestroyScrollbar _ANSI_ARGS_((char *memPtr));
static void DisplayScrollbar _ANSI_ARGS_((ClientData clientData));
static void EventuallyRedraw _ANSI_ARGS_((Scrollbar *scrollPtr));
static void ScrollbarCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void ScrollbarEventProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static int ScrollbarPosition _ANSI_ARGS_((Scrollbar *scrollPtr,
int x, int y));
static int ScrollbarWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *, int argc, char **argv));
static pascal void ScrollbarActionProc _ANSI_ARGS_((ControlRef theControl,
ControlPartCode partCode));
static pascal void ThumbActionProc _ANSI_ARGS_((void));
/*
* Globals uses locally in this file.
*/
static ControlActionUPP scrollActionProc = NULL; /* Pointer to func. */
static ThumbActionUPP thumbActionProc = NULL; /* Pointer to func. */
static Scrollbar *activeScrollPtr = NULL; /* Non-null when in thumb */
/* proc. */
/*
*--------------------------------------------------------------
*
* Tk_MacScrollbarCmd --
*
* This procedure is invoked to process the "scrollbar" Tcl
* command. See the user documentation for details on what
* it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
int
Tk_MacScrollbarCmd(clientData, interp, argc, argv)
ClientData clientData; /* Main window associated with
* interpreter. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
Tk_Window tkwin = (Tk_Window) clientData;
register Scrollbar *scrollPtr;
Tk_Window new;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " pathName ?options?\"", (char *) NULL);
return TCL_ERROR;
}
new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
if (new == NULL) {
return TCL_ERROR;
}
/*
* Initialize fields that won't be initialized by ConfigureScrollbar,
* or which ConfigureScrollbar expects to have reasonable values
* (e.g. resource pointers).
*/
scrollPtr = (Scrollbar *) ckalloc(sizeof(Scrollbar));
scrollPtr->tkwin = new;
scrollPtr->display = Tk_Display(new);
scrollPtr->interp = interp;
scrollPtr->widgetCmd = Tcl_CreateCommand(interp,
Tk_PathName(scrollPtr->tkwin), ScrollbarWidgetCmd,
(ClientData) scrollPtr, ScrollbarCmdDeletedProc);
scrollPtr->orientUid = NULL;
scrollPtr->vertical = 0;
scrollPtr->width = 0;
scrollPtr->command = NULL;
scrollPtr->commandSize = 0;
scrollPtr->repeatDelay = 0;
scrollPtr->repeatInterval = 0;
scrollPtr->borderWidth = 0;
scrollPtr->bgBorder = NULL;
scrollPtr->activeBorder = NULL;
scrollPtr->troughColorPtr = NULL;
scrollPtr->troughGC = None;
scrollPtr->copyGC = None;
scrollPtr->relief = TK_RELIEF_FLAT;
scrollPtr->highlightWidth = 0;
scrollPtr->highlightBgColorPtr = NULL;
scrollPtr->highlightColorPtr = NULL;
scrollPtr->inset = 0;
scrollPtr->elementBorderWidth = -1;
scrollPtr->arrowLength = 0;
scrollPtr->sliderFirst = 0;
scrollPtr->sliderLast = 0;
scrollPtr->activeField = 0;
scrollPtr->activeRelief = TK_RELIEF_RAISED;
scrollPtr->totalUnits = 0;
scrollPtr->windowUnits = 0;
scrollPtr->firstUnit = 0;
scrollPtr->lastUnit = 0;
scrollPtr->firstFraction = 0.0;
scrollPtr->lastFraction = 0.0;
scrollPtr->cursor = None;
scrollPtr->takeFocus = NULL;
scrollPtr->autoRepeat = NULL;
scrollPtr->flags = 0;
/*
* Mac specific inits.
*/
scrollPtr->sbHandle = NULL;
Tk_SetClass(scrollPtr->tkwin, "MacScrollbar");
Tk_CreateEventHandler(scrollPtr->tkwin,
ActivateMask|ExposureMask|StructureNotifyMask|FocusChangeMask|ButtonPressMask,
ScrollbarEventProc, (ClientData) scrollPtr);
if (ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2, 0) != TCL_OK) {
goto error;
}
interp->result = Tk_PathName(scrollPtr->tkwin);
return TCL_OK;
error:
Tk_DestroyWindow(scrollPtr->tkwin);
return TCL_ERROR;
}
/*
*--------------------------------------------------------------
*
* ScrollbarWidgetCmd --
*
* This procedure is invoked to process the Tcl command
* that corresponds to a widget managed by this module.
* See the user documentation for details on what it does.
*
* Results:
* A standard Tcl result.
*
* Side effects:
* See the user documentation.
*
*--------------------------------------------------------------
*/
static int
ScrollbarWidgetCmd(clientData, interp, argc, argv)
ClientData clientData; /* Information about scrollbar
* widget. */
Tcl_Interp *interp; /* Current interpreter. */
int argc; /* Number of arguments. */
char **argv; /* Argument strings. */
{
register Scrollbar *scrollPtr = (Scrollbar *) clientData;
int result = TCL_OK;
size_t length;
int c;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Tcl_Preserve((ClientData) scrollPtr);
c = argv[1][0];
length = strlen(argv[1]);
if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)) {
if (argc == 2) {
switch (scrollPtr->activeField) {
case TOP_ARROW: interp->result = "arrow1"; break;
case SLIDER: interp->result = "slider"; break;
case BOTTOM_ARROW: interp->result = "arrow2"; break;
}
goto done;
}
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " activate element\"", (char *) NULL);
goto error;
}
c = argv[2][0];
length = strlen(argv[2]);
if ((c == 'a') && (strcmp(argv[2], "arrow1") == 0)) {
scrollPtr->activeField = TOP_ARROW;
} else if ((c == 'a') && (strcmp(argv[2], "arrow2") == 0)) {
scrollPtr->activeField = BOTTOM_ARROW;
} else if ((c == 's') && (strncmp(argv[2], "slider", length) == 0)) {
scrollPtr->activeField = SLIDER;
} else {
scrollPtr->activeField = OUTSIDE;
}
EventuallyRedraw(scrollPtr);
} else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
&& (length >= 2)) {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " cget option\"",
(char *) NULL);
goto error;
}
result = Tk_ConfigureValue(interp, scrollPtr->tkwin, configSpecs,
(char *) scrollPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, configSpecs,
(char *) scrollPtr, (char *) NULL, 0);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, configSpecs,
(char *) scrollPtr, argv[2], 0);
} else {
result = ConfigureScrollbar(interp, scrollPtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else if ((c == 'd') && (strncmp(argv[1], "delta", length) == 0)) {
int xDelta, yDelta, pixels, length;
double fraction;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " delta xDelta yDelta\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &xDelta) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &yDelta) != TCL_OK)) {
goto error;
}
if (scrollPtr->vertical) {
pixels = yDelta;
length = Tk_Height(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
} else {
pixels = xDelta;
length = Tk_Width(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
}
if (length == 0) {
fraction = 0.0;
} else {
fraction = ((double) pixels / (double) length);
}
sprintf(interp->result, "%g", fraction);
} else if ((c == 'f') && (strncmp(argv[1], "fraction", length) == 0)) {
int x, y, pos, length;
double fraction;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " fraction x y\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
goto error;
}
if (scrollPtr->vertical) {
pos = y - (scrollPtr->arrowLength + scrollPtr->inset);
length = Tk_Height(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
} else {
pos = x - (scrollPtr->arrowLength + scrollPtr->inset);
length = Tk_Width(scrollPtr->tkwin) - 1
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
}
if (length == 0) {
fraction = 0.0;
} else {
fraction = ((double) pos / (double) length);
}
if (fraction < 0) {
fraction = 0;
} else if (fraction > 1.0) {
fraction = 1.0;
}
sprintf(interp->result, "%g", fraction);
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
if (argc != 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " get\"", (char *) NULL);
goto error;
}
if (scrollPtr->flags & NEW_STYLE_COMMANDS) {
char first[TCL_DOUBLE_SPACE], last[TCL_DOUBLE_SPACE];
Tcl_PrintDouble(interp, scrollPtr->firstFraction, first);
Tcl_PrintDouble(interp, scrollPtr->lastFraction, last);
Tcl_AppendResult(interp, first, " ", last, (char *) NULL);
} else {
sprintf(interp->result, "%d %d %d %d", scrollPtr->totalUnits,
scrollPtr->windowUnits, scrollPtr->firstUnit,
scrollPtr->lastUnit);
}
} else if ((c == 'i') && (strncmp(argv[1], "identify", length) == 0)) {
int x, y, thing;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " identify x y\"", (char *) NULL);
goto error;
}
if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
|| (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
goto error;
}
thing = ScrollbarPosition(scrollPtr, x,y);
switch (thing) {
case TOP_ARROW: interp->result = "arrow1"; break;
case TOP_GAP: interp->result = "trough1"; break;
case SLIDER: interp->result = "slider"; break;
case BOTTOM_GAP: interp->result = "trough2"; break;
case BOTTOM_ARROW: interp->result = "arrow2"; break;
}
} else if ((c == 's') && (strncmp(argv[1], "set", length) == 0)) {
int totalUnits, windowUnits, firstUnit, lastUnit;
if (argc == 4) {
double first, last;
if (Tcl_GetDouble(interp, argv[2], &first) != TCL_OK) {
goto error;
}
if (Tcl_GetDouble(interp, argv[3], &last) != TCL_OK) {
goto error;
}
if (first < 0) {
scrollPtr->firstFraction = 0;
} else if (first > 1.0) {
scrollPtr->firstFraction = 1.0;
} else {
scrollPtr->firstFraction = first;
}
if (last < scrollPtr->firstFraction) {
scrollPtr->lastFraction = scrollPtr->firstFraction;
} else if (last > 1.0) {
scrollPtr->lastFraction = 1.0;
} else {
scrollPtr->lastFraction = last;
}
scrollPtr->flags |= NEW_STYLE_COMMANDS;
} else if (argc == 6) {
if (Tcl_GetInt(interp, argv[2], &totalUnits) != TCL_OK) {
goto error;
}
if (totalUnits < 0) {
totalUnits = 0;
}
if (Tcl_GetInt(interp, argv[3], &windowUnits) != TCL_OK) {
goto error;
}
if (windowUnits < 0) {
windowUnits = 0;
}
if (Tcl_GetInt(interp, argv[4], &firstUnit) != TCL_OK) {
goto error;
}
if (Tcl_GetInt(interp, argv[5], &lastUnit) != TCL_OK) {
goto error;
}
if (totalUnits > 0) {
if (lastUnit < firstUnit) {
lastUnit = firstUnit;
}
} else {
firstUnit = lastUnit = 0;
}
scrollPtr->totalUnits = totalUnits;
scrollPtr->windowUnits = windowUnits;
scrollPtr->firstUnit = firstUnit;
scrollPtr->lastUnit = lastUnit;
if (scrollPtr->totalUnits == 0) {
scrollPtr->firstFraction = 0.0;
scrollPtr->lastFraction = 1.0;
} else {
scrollPtr->firstFraction = ((double) firstUnit)/totalUnits;
scrollPtr->lastFraction = ((double) (lastUnit+1))/totalUnits;
}
scrollPtr->flags &= ~NEW_STYLE_COMMANDS;
} else {
Tcl_AppendResult(interp, "wrong # args: should be \"",
argv[0], " set firstFraction lastFraction\" or \"",
argv[0],
" set totalUnits windowUnits firstUnit lastUnit\"",
(char *) NULL);
goto error;
}
ComputeScrollbarGeometry(scrollPtr);
EventuallyRedraw(scrollPtr);
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be activate, cget, configure, delta, fraction, ",
"get, identify, or set", (char *) NULL);
goto error;
}
done:
Tcl_Release((ClientData) scrollPtr);
return result;
error:
Tcl_Release((ClientData) scrollPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* DestroyScrollbar --
*
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
* to clean up the internal structure of a scrollbar at a safe time
* (when no-one is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the scrollbar is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyScrollbar(memPtr)
char *memPtr; /* Info about scrollbar widget. */
{
register Scrollbar *scrollPtr = (Scrollbar *) memPtr;
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff.
*/
/*
* Free Macintosh control.
*/
if (scrollPtr->sbHandle != NULL) {
DisposeControl(scrollPtr->sbHandle);
scrollPtr->sbHandle = NULL;
}
if (scrollPtr->troughGC != None) {
Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
}
if (scrollPtr->copyGC != None) {
Tk_FreeGC(scrollPtr->display, scrollPtr->copyGC);
}
Tk_FreeOptions(configSpecs, (char *) scrollPtr, scrollPtr->display, 0);
ckfree((char *) scrollPtr);
}
/*
*----------------------------------------------------------------------
*
* ConfigureScrollbar --
*
* This procedure is called to process an argv/argc list, plus
* the Tk option database, in order to configure (or
* reconfigure) a scrollbar widget.
*
* Results:
* The return value is a standard Tcl result. If TCL_ERROR is
* returned, then interp->result contains an error message.
*
* Side effects:
* Configuration information, such as colors, border width,
* etc. get set for scrollPtr; old resources get freed,
* if there were any.
*
*----------------------------------------------------------------------
*/
static int
ConfigureScrollbar(interp, scrollPtr, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register Scrollbar *scrollPtr; /* Information about widget; may or
* may not already have values for
* some fields. */
int argc; /* Number of valid entries in argv. */
char **argv; /* Arguments. */
int flags; /* Flags to pass to
* Tk_ConfigureWidget. */
{
size_t length;
XGCValues gcValues;
GC new;
if (Tk_ConfigureWidget(interp, scrollPtr->tkwin, configSpecs,
argc, argv, (char *) scrollPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
/*
* A few options need special processing, such as parsing the
* orientation or setting the background from a 3-D border.
*/
length = strlen(scrollPtr->orientUid);
if (strncmp(scrollPtr->orientUid, "vertical", length) == 0) {
scrollPtr->vertical = 1;
} else if (strncmp(scrollPtr->orientUid, "horizontal", length) == 0) {
scrollPtr->vertical = 0;
} else {
Tcl_AppendResult(interp, "bad orientation \"", scrollPtr->orientUid,
"\": must be vertical or horizontal", (char *) NULL);
return TCL_ERROR;
}
if (scrollPtr->command != NULL) {
scrollPtr->commandSize = strlen(scrollPtr->command);
} else {
scrollPtr->commandSize = 0;
}
Tk_SetBackgroundFromBorder(scrollPtr->tkwin, scrollPtr->bgBorder);
gcValues.foreground = scrollPtr->troughColorPtr->pixel;
new = Tk_GetGC(scrollPtr->tkwin, GCForeground, &gcValues);
if (scrollPtr->troughGC != None) {
Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
}
scrollPtr->troughGC = new;
if (scrollPtr->copyGC == None) {
gcValues.graphics_exposures = False;
scrollPtr->copyGC = Tk_GetGC(scrollPtr->tkwin, GCGraphicsExposures,
&gcValues);
}
/*
* Register the desired geometry for the window (leave enough space
* for the two arrows plus a minimum-size slider, plus border around
* the whole window, if any). Then arrange for the window to be
* redisplayed.
*/
ComputeScrollbarGeometry(scrollPtr);
EventuallyRedraw(scrollPtr);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* DisplayScrollbar --
*
* This procedure redraws the contents of a scrollbar window.
* It is invoked as a do-when-idle handler, so it only runs
* when there's nothing else for the application to do.
*
* Results:
* None.
*
* Side effects:
* Information appears on the screen.
*
*--------------------------------------------------------------
*/
static void
DisplayScrollbar(clientData)
ClientData clientData; /* Information about window. */
{
register Scrollbar *scrollPtr = (Scrollbar *) clientData;
register Tk_Window tkwin = scrollPtr->tkwin;
MacDrawable *macDraw;
CGrafPtr saveWorld;
GDHandle saveDevice;
GWorldPtr destPort;
double middle;
WindowRef windowRef;
int drawGrowRgn = false;
int flushRight = false;
int flushBottom = false;
if ((scrollPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
goto done;
}
/*
* Draw the focus or any 3D relief we may have.
*/
if (scrollPtr->highlightWidth != 0) {
GC gc;
if (scrollPtr->flags & GOT_FOCUS) {
gc = Tk_GCForColor(scrollPtr->highlightColorPtr,
Tk_WindowId(tkwin));
} else {
gc = Tk_GCForColor(scrollPtr->highlightBgColorPtr,
Tk_WindowId(tkwin));
}
Tk_DrawFocusHighlight(tkwin, gc, scrollPtr->highlightWidth,
Tk_WindowId(tkwin));
}
Tk_Draw3DRectangle(tkwin, Tk_WindowId(tkwin), scrollPtr->bgBorder,
scrollPtr->highlightWidth, scrollPtr->highlightWidth,
Tk_Width(tkwin) - 2*scrollPtr->highlightWidth,
Tk_Height(tkwin) - 2*scrollPtr->highlightWidth,
scrollPtr->borderWidth, scrollPtr->relief);
/*
* Set up port for drawing Macintosh control.
*/
macDraw = (MacDrawable *) Tk_WindowId(tkwin);
destPort = TkMacGetDrawablePort(Tk_WindowId(tkwin));
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(destPort, NULL);
TkMacSetUpClippingRgn(Tk_WindowId(tkwin));
/*
* Given the Tk parameters for the fractions of the start and
* end of the thumb, the following calculation determines the
* location for the fixed sized Macintosh thumb.
*/
middle = scrollPtr->firstFraction / (scrollPtr->firstFraction +
(1.0 - scrollPtr->lastFraction));
if (scrollPtr->sbHandle == NULL) {
Rect r;
r.left = r.top = 0;
r.right = r.bottom = 1;
scrollPtr->sbHandle = NewControl((WindowRef) destPort, &r, "\p",
false, (short) (middle * 1000), 0, 1000,
scrollBarProc, (SInt32) scrollPtr);
/*
* If we are foremost than make us active.
*/
if ((WindowPtr) destPort == FrontWindow()) {
scrollPtr->flags |= ACTIVE;
}
}
windowRef = (**scrollPtr->sbHandle).contrlOwner;
/*
* We can't use the Macintosh commands SizeControl and MoveControl as these
* calls will also cause a redraw which in our case will also cause
* flicker. To avoid this we adjust the control record directly. The
* Draw1Control command appears to just draw where ever the control says to
* draw so this seems right.
*
* NOTE: changing the control record directly may not work when
* Apple releases the Copland version of the MacOS in late 1996.
*/
(**scrollPtr->sbHandle).contrlRect.left = macDraw->xOff + scrollPtr->inset;
(**scrollPtr->sbHandle).contrlRect.top = macDraw->yOff + scrollPtr->inset;
(**scrollPtr->sbHandle).contrlRect.right = macDraw->xOff + Tk_Width(tkwin)
- scrollPtr->inset;
(**scrollPtr->sbHandle).contrlRect.bottom = macDraw->yOff +
Tk_Height(tkwin) - scrollPtr->inset;
/*
* Here is a lovely hack to draw the grow region of a window.
*/
/* TODO: use accessor function!!! */
if (windowRef->portRect.top == (**scrollPtr->sbHandle).contrlRect.top) {
(**scrollPtr->sbHandle).contrlRect.top--;
}
if (windowRef->portRect.left == (**scrollPtr->sbHandle).contrlRect.left) {
(**scrollPtr->sbHandle).contrlRect.left--;
}
if (windowRef->portRect.right == (**scrollPtr->sbHandle).contrlRect.right) {
flushRight = true;
(**scrollPtr->sbHandle).contrlRect.right++;
}
if (windowRef->portRect.bottom == (**scrollPtr->sbHandle).contrlRect.bottom) {
flushBottom = true;
(**scrollPtr->sbHandle).contrlRect.bottom++;
}
if (flushBottom && flushRight) {
if (scrollPtr->vertical) {
(**scrollPtr->sbHandle).contrlRect.bottom -= 14;
} else {
(**scrollPtr->sbHandle).contrlRect.right -= 14;
}
drawGrowRgn = true;
TkMacSetScrollbarGrow((TkWindow *) tkwin, true);
} else {
TkMacSetScrollbarGrow((TkWindow *) tkwin, false);
}
/*
* Set the thumb position in the scrollbar.
*/
(**scrollPtr->sbHandle).contrlValue = (short) (middle * 1000);
if ((**scrollPtr->sbHandle).contrlHilite == 0 ||
(**scrollPtr->sbHandle).contrlHilite == 255) {
if (scrollPtr->firstFraction == 0.0 &&
scrollPtr->lastFraction == 1.0) {
(**scrollPtr->sbHandle).contrlHilite = 255;
} else {
(**scrollPtr->sbHandle).contrlHilite = 0;
}
}
if ((**scrollPtr->sbHandle).contrlVis != 255) {
(**scrollPtr->sbHandle).contrlVis = 255;
}
if (scrollPtr->flags & ACTIVE) {
Draw1Control(scrollPtr->sbHandle);
if (drawGrowRgn) {
DrawGrowIcon(windowRef);
}
} else {
(**scrollPtr->sbHandle).contrlHilite = 255;
Draw1Control(scrollPtr->sbHandle);
if (drawGrowRgn) {
DrawGrowIcon(windowRef);
Tk_Fill3DRectangle(tkwin, Tk_WindowId(tkwin), scrollPtr->bgBorder,
Tk_Width(tkwin) - 13, Tk_Height(tkwin) - 13,
Tk_Width(tkwin), Tk_Height(tkwin),
0, TK_RELIEF_FLAT);
}
}
SetGWorld(saveWorld, saveDevice);
done:
scrollPtr->flags &= ~REDRAW_PENDING;
}
/*
*--------------------------------------------------------------
*
* ScrollbarEventProc --
*
* This procedure is invoked by the Tk dispatcher for various
* events on scrollbars.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get
* cleaned up. When it gets exposed, it is redisplayed.
*
*--------------------------------------------------------------
*/
static void
ScrollbarEventProc(clientData, eventPtr)
ClientData clientData; /* Information about window. */
XEvent *eventPtr; /* Information about event. */
{
Scrollbar *scrollPtr = (Scrollbar *) clientData;
Tcl_Interp *interp;
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
EventuallyRedraw(scrollPtr);
} else if (eventPtr->type == DestroyNotify) {
if (scrollPtr->tkwin != NULL) {
scrollPtr->tkwin = NULL;
Tcl_DeleteCommand(scrollPtr->interp,
Tcl_GetCommandName(scrollPtr->interp,
scrollPtr->widgetCmd));
}
if (scrollPtr->flags & REDRAW_PENDING) {
Tk_CancelIdleCall(DisplayScrollbar, (ClientData) scrollPtr);
}
Tcl_EventuallyFree((ClientData) scrollPtr, DestroyScrollbar);
} else if (eventPtr->type == ConfigureNotify) {
ComputeScrollbarGeometry(scrollPtr);
EventuallyRedraw(scrollPtr);
} else if (eventPtr->type == FocusIn) {
if (eventPtr->xfocus.detail != NotifyInferior) {
scrollPtr->flags |= GOT_FOCUS;
if (scrollPtr->highlightWidth > 0) {
EventuallyRedraw(scrollPtr);
}
}
} else if (eventPtr->type == FocusOut) {
if (eventPtr->xfocus.detail != NotifyInferior) {
scrollPtr->flags &= ~GOT_FOCUS;
if (scrollPtr->highlightWidth > 0) {
EventuallyRedraw(scrollPtr);
}
}
} else if (eventPtr->type == UnmapNotify) {
TkMacSetScrollbarGrow((TkWindow *) scrollPtr->tkwin, false);
} else if (eventPtr->type == ActivateNotify) {
scrollPtr->flags |= ACTIVE;
EventuallyRedraw(scrollPtr);
} else if (eventPtr->type == DeactivateNotify) {
scrollPtr->flags &= ~ACTIVE;
EventuallyRedraw(scrollPtr);
} else if (eventPtr->type == ButtonPress) {
Point where;
Rect bounds;
int part, x, y, dummy;
unsigned int state;
CGrafPtr saveWorld;
GDHandle saveDevice;
GWorldPtr destPort;
Window dummyWin;
/*
* To call Macintosh control routines we must have the port
* set to the window containing the control. We will then test
* which part of the control was hit and act accordingly.
*/
destPort = TkMacGetDrawablePort(Tk_WindowId(scrollPtr->tkwin));
GetGWorld(&saveWorld, &saveDevice);
SetGWorld(destPort, NULL);
TkMacSetUpClippingRgn(Tk_WindowId(scrollPtr->tkwin));
TkMacWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
where.h = eventPtr->xbutton.x + bounds.left;
where.v = eventPtr->xbutton.y + bounds.top;
part = TestControl(scrollPtr->sbHandle, where);
if (part == inThumb && scrollPtr->jump == false) {
/*
* Case 1: In thumb, no jump scrolling. Call track control
* with the thumb action proc which will do most of the work.
* Set the global activeScrollPtr to the current control
* so the callback may have access to it.
*/
if (thumbActionProc == NULL) {
thumbActionProc = NewThumbActionProc(ThumbActionProc);
}
activeScrollPtr = scrollPtr;
part = TrackControl(scrollPtr->sbHandle, where,
(ControlActionUPP) thumbActionProc);
activeScrollPtr = NULL;
} else if (part == inThumb) {
/*
* Case 2: in thumb with jump scrolling. Call TrackControl
* with a NULL action proc. Use the new value of the control
* to set update the control.
*/
part = TrackControl(scrollPtr->sbHandle, where, NULL);
if (part == inThumb) {
double newFirstFraction, thumbWidth;
Tcl_DString cmdString;
char vauleString[TCL_DOUBLE_SPACE];
/*
* The following calculation takes the new control
* value and maps it to what Tk needs for its variable
* thumb size representation.
*/
thumbWidth = scrollPtr->lastFraction
- scrollPtr->firstFraction;
newFirstFraction = (1.0 - thumbWidth) *
((double) GetControlValue(scrollPtr->sbHandle) / 1000.0);
sprintf(vauleString, "%g", newFirstFraction);
Tcl_DStringInit(&cmdString);
Tcl_DStringAppend(&cmdString, scrollPtr->command,
strlen(scrollPtr->command));
Tcl_DStringAppendElement(&cmdString, "moveto");
Tcl_DStringAppendElement(&cmdString, vauleString);
Tcl_DStringAppend(&cmdString, "; update idletasks",
strlen("; update idletasks"));
interp = scrollPtr->interp;
Tcl_Preserve((ClientData) interp);
Tcl_GlobalEval(interp, cmdString.string);
Tcl_Release((ClientData) interp);
Tcl_DStringFree(&cmdString);
}
} else if (part != 0) {
/*
* Case 3: in any other part of the scrollbar. We call
* TrackControl with the scrollActionProc which will do
* most all the work.
*/
if (scrollActionProc == NULL) {
scrollActionProc = NewControlActionProc(ScrollbarActionProc);
}
TrackControl(scrollPtr->sbHandle, where, scrollActionProc);
HiliteControl(scrollPtr->sbHandle, 0);
}
/*
* The TrackControl call will "eat" the ButtonUp event. We now
* generate a ButtonUp event so Tk will unset implicit grabs etc.
*/
GetMouse(&where);
XQueryPointer(NULL, None, &dummyWin, &dummyWin, &x,
&y, &dummy, &dummy, &state);
TkGenerateButtonEvent(x, y, state);
SetGWorld(saveWorld, saveDevice);
}
}
/*
*----------------------------------------------------------------------
*
* ScrollbarCmdDeletedProc --
*
* This procedure is invoked when a widget command is deleted. If
* the widget isn't already in the process of being destroyed,
* this command destroys it.
*
* Results:
* None.
*
* Side effects:
* The widget is destroyed.
*
*----------------------------------------------------------------------
*/
static void
ScrollbarCmdDeletedProc(clientData)
ClientData clientData; /* Pointer to widget record for widget. */
{
Scrollbar *scrollPtr = (Scrollbar *) clientData;
Tk_Window tkwin = scrollPtr->tkwin;
/*
* This procedure could be invoked either because the window was
* destroyed and the command was then deleted (in which case tkwin
* is NULL) or because the command was deleted, and then this procedure
* destroys the widget.
*/
if (tkwin != NULL) {
scrollPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*----------------------------------------------------------------------
*
* ComputeScrollbarGeometry --
*
* After changes in a scrollbar's size or configuration, this
* procedure recomputes various geometry information used in
* displaying the scrollbar.
*
* Results:
* None.
*
* Side effects:
* The scrollbar will be displayed differently.
*
*----------------------------------------------------------------------
*/
static void
ComputeScrollbarGeometry(scrollPtr)
register Scrollbar *scrollPtr; /* Scrollbar whose geometry may
* have changed. */
{
int width, fieldLength;
/* TODO: this should be Mac specific */
if (scrollPtr->highlightWidth < 0) {
scrollPtr->highlightWidth = 0;
}
scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
width = (scrollPtr->vertical) ? Tk_Width(scrollPtr->tkwin)
: Tk_Height(scrollPtr->tkwin);
scrollPtr->arrowLength = width - 2*scrollPtr->inset + 1;
fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
: Tk_Width(scrollPtr->tkwin))
- 2*(scrollPtr->arrowLength + scrollPtr->inset);
if (fieldLength < 0) {
fieldLength = 0;
}
scrollPtr->sliderFirst = fieldLength*scrollPtr->firstFraction;
scrollPtr->sliderLast = fieldLength*scrollPtr->lastFraction;
/*
* Adjust the slider so that some piece of it is always
* displayed in the scrollbar and so that it has at least
* a minimal width (so it can be grabbed with the mouse).
*/
if (scrollPtr->sliderFirst > (fieldLength - 2*scrollPtr->borderWidth)) {
scrollPtr->sliderFirst = fieldLength - 2*scrollPtr->borderWidth;
}
if (scrollPtr->sliderFirst < 0) {
scrollPtr->sliderFirst = 0;
}
if (scrollPtr->sliderLast < (scrollPtr->sliderFirst
+ MIN_SLIDER_LENGTH)) {
scrollPtr->sliderLast = scrollPtr->sliderFirst + MIN_SLIDER_LENGTH;
}
if (scrollPtr->sliderLast > fieldLength) {
scrollPtr->sliderLast = fieldLength;
}
scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
/*
* Register the desired geometry for the window (leave enough space
* for the two arrows plus a minimum-size slider, plus border around
* the whole window, if any). Then arrange for the window to be
* redisplayed.
*/
if (scrollPtr->vertical) {
Tk_GeometryRequest(scrollPtr->tkwin,
scrollPtr->width + 2*scrollPtr->inset,
2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+ scrollPtr->inset));
} else {
Tk_GeometryRequest(scrollPtr->tkwin,
2*(scrollPtr->arrowLength + scrollPtr->borderWidth
+ scrollPtr->inset), scrollPtr->width + 2*scrollPtr->inset);
}
Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);
}
/*
*--------------------------------------------------------------
*
* ScrollbarPosition --
*
* 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.
*
*--------------------------------------------------------------
*/
static int
ScrollbarPosition(scrollPtr, x, y)
register Scrollbar *scrollPtr; /* Scrollbar widget record. */
int x, y; /* Coordinates within scrollPtr's
* window. */
{
int length, width, tmp;
ControlPartCode part;
Point where;
Rect bounds;
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
* DisplayScrollbar. Be sure to keep the two consistent.
*/
TkMacWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
where.h = x + bounds.left;
where.v = y + bounds.top;
part = TestControl(scrollPtr->sbHandle, where);
switch (part) {
case inUpButton:
return TOP_ARROW;
case inPageUp:
return TOP_GAP;
case inThumb:
return SLIDER;
case inPageDown:
return BOTTOM_GAP;
case inDownButton:
return BOTTOM_ARROW;
default:
return OUTSIDE;
}
}
/*
*--------------------------------------------------------------
*
* EventuallyRedraw --
*
* Arrange for one or more of the fields of a scrollbar
* to be redrawn.
*
* Results:
* None.
*
* Side effects:
* None.
*
*--------------------------------------------------------------
*/
static void
EventuallyRedraw(scrollPtr)
register Scrollbar *scrollPtr; /* Information about widget. */
{
if ((scrollPtr->tkwin == NULL) || (!Tk_IsMapped(scrollPtr->tkwin))) {
return;
}
if ((scrollPtr->flags & REDRAW_PENDING) == 0) {
Tk_DoWhenIdle(DisplayScrollbar, (ClientData) scrollPtr);
scrollPtr->flags |= REDRAW_PENDING;
}
}
/*
*--------------------------------------------------------------
*
* ScrollbarActionProc --
*
* Callback procedure used by the Macintosh toolbox call
* TrackControl. This call will update the display while
* the scrollbar is being manipulated by the user.
*
* Results:
* None.
*
* Side effects:
* May change the display.
*
*--------------------------------------------------------------
*/
static pascal void
ScrollbarActionProc(ControlRef theControl, ControlPartCode partCode)
/* ControlRef theControl; /* Handle to scrollbat control */
/* ControlPartCode partCode; /* Part of scrollbar that was "hit" */
{
register Scrollbar *scrollPtr = (Scrollbar *) GetCRefCon(theControl);
Tcl_DString cmdString;
Tcl_Interp *interp;
Tcl_DStringInit(&cmdString);
switch (partCode) {
case inPageUp:
case inPageDown:
case inDownButton:
case inUpButton:
if (partCode == inPageUp || partCode == inPageDown) {
Tcl_DStringAppendElement(&cmdString, "tkScrollByPages");
} else {
Tcl_DStringAppendElement(&cmdString, "tkScrollByUnits");
}
Tcl_DStringAppendElement(&cmdString,
Tk_PathName(scrollPtr->tkwin));
Tcl_DStringAppendElement(&cmdString, "hv");
if (partCode == inPageUp || partCode == inUpButton) {
Tcl_DStringAppendElement(&cmdString, "-1");
} else {
Tcl_DStringAppendElement(&cmdString, "1");
}
Tcl_DStringAppend(&cmdString, "; update idletasks",
strlen("; update idletasks"));
interp = scrollPtr->interp;
Tcl_Preserve((ClientData) interp);
Tcl_GlobalEval(interp, cmdString.string);
Tcl_Release((ClientData) interp);
break;
}
Tcl_DStringFree(&cmdString);
}
/*
*--------------------------------------------------------------
*
* ThumbActionProc --
*
* Callback procedure used by the Macintosh toolbox call
* TrackControl. This call is used to track the thumb of
* the scrollbar. Unlike the ScrollbarActionProc function
* this function is called once and basically takes over
* tracking the scrollbar from the control. This is done
* to avoid conflicts with what the control plans to draw.
*
* Results:
* None.
*
* Side effects:
* May change the display.
*
*--------------------------------------------------------------
*/
static pascal void
ThumbActionProc()
{
register Scrollbar *scrollPtr = activeScrollPtr;
Tcl_DString cmdString;
Rect nullRect = {0,0,0,0};
int origValue, trackBarPin;
double thumbWidth, newFirstFraction, trackBarSize;
char vauleString[40];
Point currentPoint = { 0, 0 };
Point lastPoint = { 0, 0 };
Rect trackRect;
Tcl_Interp *interp;
if (scrollPtr == NULL) {
return;
}
Tcl_DStringInit(&cmdString);
/*
* First compute values that will remain constant during the tracking
* of the thumb. The variable trackBarSize is the length of the scrollbar
* minus the 2 arrows and half the width of the thumb on both sides
* (3 * arrowLength). The variable trackBarPin is the lower starting point
* of the drag region.
*
* Note: the arrowLength is equal to the thumb width of a Mac scrollbar.
*/
origValue = GetControlValue(scrollPtr->sbHandle);
trackRect = (**scrollPtr->sbHandle).contrlRect;
if (scrollPtr->vertical == true) {
trackBarSize = (double) (trackRect.bottom - trackRect.top
- (scrollPtr->arrowLength * 3));
trackBarPin = trackRect.top + scrollPtr->arrowLength
+ (scrollPtr->arrowLength / 2);
InsetRect(&trackRect, -25, -113);
} else {
trackBarSize = (double) (trackRect.right - trackRect.left
- (scrollPtr->arrowLength * 3));
trackBarPin = trackRect.left + scrollPtr->arrowLength
+ (scrollPtr->arrowLength / 2);
InsetRect(&trackRect, -113, -25);
}
/*
* Track the mouse while the button is held down. If the mouse is moved,
* we calculate the value that should be passed to the "command" part of
* the scrollbar.
*/
while (StillDown()) {
GetMouse(&currentPoint);
if (EqualPt(currentPoint, lastPoint)) {
continue;
}
lastPoint = currentPoint;
/*
* Calculating this value is a little tricky. We need to calculate a
* value for where the thumb would be in a Motif widget (variable
* thumb). This value is what the "command" expects and is what will
* be resent to the scrollbar to update its value.
*/
thumbWidth = scrollPtr->lastFraction - scrollPtr->firstFraction;
if (PtInRect(currentPoint, &trackRect)) {
if (scrollPtr->vertical == true) {
newFirstFraction = (1.0 - thumbWidth) *
((double) (currentPoint.v - trackBarPin) / trackBarSize);
} else {
newFirstFraction = (1.0 - thumbWidth) *
((double) (currentPoint.h - trackBarPin) / trackBarSize);
}
} else {
newFirstFraction = ((double) origValue / 1000.0)
* (1.0 - thumbWidth);
}
sprintf(vauleString, "%g", newFirstFraction);
Tcl_DStringSetLength(&cmdString, 0);
Tcl_DStringAppend(&cmdString, scrollPtr->command,
strlen(scrollPtr->command));
Tcl_DStringAppendElement(&cmdString, "moveto");
Tcl_DStringAppendElement(&cmdString, vauleString);
Tcl_DStringAppend(&cmdString, "; update idletasks",
strlen("; update idletasks"));
interp = scrollPtr->interp;
Tcl_Preserve((ClientData) interp);
Tcl_GlobalEval(interp, cmdString.string);
Tcl_Release((ClientData) interp);
}
/*
* This next bit of code is a bit of a hack - but needed. The problem is
* that the control wants to draw the drag outline if the control value
* changes during the drag (which it does). What we do here is change the
* clip region to hide this drawing from the user.
*/
ClipRect(&nullRect);
Tcl_DStringFree(&cmdString);
return;
}