209 lines
7.1 KiB
C
209 lines
7.1 KiB
C
/*
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* tkScrollbar.h --
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*
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* Declarations of types and functions used to implement
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* the scrollbar 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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* SCCS: @(#) tkScrollbar.h 1.8 96/11/05 11:34:58
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*/
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#ifndef _TKSCROLLBAR
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#define _TKSCROLLBAR
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#ifndef _TKINT
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#include "tkInt.h"
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#endif
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#ifdef BUILD_tk
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# undef TCL_STORAGE_CLASS
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# define TCL_STORAGE_CLASS DLLEXPORT
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#endif
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/*
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* A data structure of the following type is kept for each scrollbar
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* widget.
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*/
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typedef struct TkScrollbar {
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Tk_Window tkwin; /* Window that embodies the scrollbar. NULL
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* means that the window has been destroyed
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* but the data structures haven't yet been
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* cleaned up.*/
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Display *display; /* Display containing widget. Used, among
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* other things, so that resources can be
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* freed even after tkwin has gone away. */
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Tcl_Interp *interp; /* Interpreter associated with scrollbar. */
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Tcl_Command widgetCmd; /* Token for scrollbar's widget command. */
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Tk_Uid orientUid; /* Orientation for window ("vertical" or
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* "horizontal"). */
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int vertical; /* Non-zero means vertical orientation
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* requested, zero means horizontal. */
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int width; /* Desired narrow dimension of scrollbar,
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* in pixels. */
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char *command; /* Command prefix to use when invoking
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* scrolling commands. NULL means don't
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* invoke commands. Malloc'ed. */
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int commandSize; /* Number of non-NULL bytes in command. */
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int repeatDelay; /* How long to wait before auto-repeating
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* on scrolling actions (in ms). */
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int repeatInterval; /* Interval between autorepeats (in ms). */
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int jump; /* Value of -jump option. */
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/*
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* Information used when displaying widget:
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*/
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int borderWidth; /* Width of 3-D borders. */
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Tk_3DBorder bgBorder; /* Used for drawing background (all flat
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* surfaces except for trough). */
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Tk_3DBorder activeBorder; /* For drawing backgrounds when active (i.e.
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* when mouse is positioned over element). */
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XColor *troughColorPtr; /* Color for drawing trough. */
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int relief; /* Indicates whether window as a whole is
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* raised, sunken, or flat. */
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int highlightWidth; /* Width in pixels of highlight to draw
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* around widget when it has the focus.
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* <= 0 means don't draw a highlight. */
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XColor *highlightBgColorPtr;
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/* Color for drawing traversal highlight
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* area when highlight is off. */
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XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
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int inset; /* Total width of all borders, including
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* traversal highlight and 3-D border.
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* Indicates how much interior stuff must
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* be offset from outside edges to leave
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* room for borders. */
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int elementBorderWidth; /* Width of border to draw around elements
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* inside scrollbar (arrows and slider).
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* -1 means use borderWidth. */
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int arrowLength; /* Length of arrows along long dimension of
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* scrollbar, including space for a small gap
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* between the arrow and the slider.
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* Recomputed on window size changes. */
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int sliderFirst; /* Pixel coordinate of top or left edge
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* of slider area, including border. */
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int sliderLast; /* Coordinate of pixel just after bottom
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* or right edge of slider area, including
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* border. */
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int activeField; /* Names field to be displayed in active
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* colors, such as TOP_ARROW, or 0 for
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* no field. */
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int activeRelief; /* Value of -activeRelief option: relief
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* to use for active element. */
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/*
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* Information describing the application related to the scrollbar.
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* This information is provided by the application by invoking the
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* "set" widget command. This information can now be provided in
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* two ways: the "old" form (totalUnits, windowUnits, firstUnit,
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* and lastUnit), or the "new" form (firstFraction and lastFraction).
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* FirstFraction and lastFraction will always be valid, but
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* the old-style information is only valid if the NEW_STYLE_COMMANDS
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* flag is 0.
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*/
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int totalUnits; /* Total dimension of application, in
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* units. Valid only if the NEW_STYLE_COMMANDS
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* flag isn't set. */
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int windowUnits; /* Maximum number of units that can be
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* displayed in the window at once. Valid
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* only if the NEW_STYLE_COMMANDS flag isn't
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* set. */
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int firstUnit; /* Number of last unit visible in
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* application's window. Valid only if the
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* NEW_STYLE_COMMANDS flag isn't set. */
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int lastUnit; /* Index of last unit visible in window.
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* Valid only if the NEW_STYLE_COMMANDS
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* flag isn't set. */
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double firstFraction; /* Position of first visible thing in window,
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* specified as a fraction between 0 and
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* 1.0. */
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double lastFraction; /* Position of last visible thing in window,
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* specified as a fraction between 0 and
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* 1.0. */
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/*
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* Miscellaneous information:
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*/
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Tk_Cursor cursor; /* Current cursor for window, or None. */
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char *takeFocus; /* Value of -takefocus option; not used in
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* the C code, but used by keyboard traversal
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* scripts. Malloc'ed, but may be NULL. */
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int flags; /* Various flags; see below for
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* definitions. */
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} TkScrollbar;
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/*
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* Legal values for "activeField" field of Scrollbar structures. These
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* are also the return values from the ScrollbarPosition procedure.
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*/
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#define OUTSIDE 0
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#define TOP_ARROW 1
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#define TOP_GAP 2
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#define SLIDER 3
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#define BOTTOM_GAP 4
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#define BOTTOM_ARROW 5
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/*
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* Flag bits for scrollbars:
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*
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* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
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* has already been queued to redraw
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* this window.
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* NEW_STYLE_COMMANDS: Non-zero means the new style of commands
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* should be used to communicate with the
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* widget: ".t yview scroll 2 lines", instead
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* of ".t yview 40", for example.
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* GOT_FOCUS: Non-zero means this window has the input
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* focus.
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*/
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#define REDRAW_PENDING 1
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#define NEW_STYLE_COMMANDS 2
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#define GOT_FOCUS 4
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/*
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* Declaration of scrollbar class procedures structure.
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*/
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extern TkClassProcs tkpScrollbarProcs;
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/*
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* Declaration of scrollbar configuration options.
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*/
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extern Tk_ConfigSpec tkpScrollbarConfigSpecs[];
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/*
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* Declaration of procedures used in the implementation of the scrollbar
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* widget.
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*/
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EXTERN void TkScrollbarEventProc _ANSI_ARGS_((
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ClientData clientData, XEvent *eventPtr));
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EXTERN void TkScrollbarEventuallyRedraw _ANSI_ARGS_((
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TkScrollbar *scrollPtr));
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EXTERN void TkpComputeScrollbarGeometry _ANSI_ARGS_((
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TkScrollbar *scrollPtr));
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EXTERN TkScrollbar * TkpCreateScrollbar _ANSI_ARGS_((Tk_Window tkwin));
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EXTERN void TkpDestroyScrollbar _ANSI_ARGS_((
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TkScrollbar *scrollPtr));
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EXTERN void TkpDisplayScrollbar _ANSI_ARGS_((
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ClientData clientData));
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EXTERN void TkpConfigureScrollbar _ANSI_ARGS_((
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TkScrollbar *scrollPtr));
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EXTERN int TkpScrollbarPosition _ANSI_ARGS_((
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TkScrollbar *scrollPtr, int x, int y));
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# undef TCL_STORAGE_CLASS
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# define TCL_STORAGE_CLASS DLLIMPORT
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#endif /* _TKSCROLLBAR */
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