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markom |
/*
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* tkScale.h --
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*
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* Declarations of types and functions used to implement
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* the scale 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: tkScale.h,v 1.1.1.1 2002-01-16 10:25:52 markom Exp $
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*/
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#ifndef _TKSCALE
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#define _TKSCALE
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#ifndef _TK
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#include "tk.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 scale
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* widget managed by this file:
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*/
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typedef struct TkScale {
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Tk_Window tkwin; /* Window that embodies the scale. 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 scale. */
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Tcl_Command widgetCmd; /* Token for scale'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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* zero means horizontal. */
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int width; /* Desired narrow dimension of scale,
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* in pixels. */
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int length; /* Desired long dimension of scale,
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* in pixels. */
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double value; /* Current value of scale. */
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char *varName; /* Name of variable (malloc'ed) or NULL.
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* If non-NULL, scale's value tracks
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* the contents of this variable and
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* vice versa. */
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double fromValue; /* Value corresponding to left or top of
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* scale. */
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double toValue; /* Value corresponding to right or bottom
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* of scale. */
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double tickInterval; /* Distance between tick marks; 0 means
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* don't display any tick marks. */
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double resolution; /* If > 0, all values are rounded to an
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* even multiple of this value. */
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int digits; /* Number of significant digits to print
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* in values. 0 means we get to choose the
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* number based on resolution and/or the
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* range of the scale. */
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char format[10]; /* Sprintf conversion specifier computed from
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* digits and other information. */
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double bigIncrement; /* Amount to use for large increments to
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* scale value. (0 means we pick a value). */
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char *command; /* Command prefix to use when invoking Tcl
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* commands because the scale value changed.
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* NULL means don't invoke commands.
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* Malloc'ed. */
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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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char *label; /* Label to display above or to right of
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* scale; NULL means don't display a
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* label. Malloc'ed. */
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int labelLength; /* Number of non-NULL chars. in label. */
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Tk_Uid state; /* Normal or disabled. Value cannot be
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* changed when scale is disabled. */
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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 border around window. */
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Tk_3DBorder bgBorder; /* Used for drawing slider and other
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* background areas. */
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Tk_3DBorder activeBorder; /* For drawing the slider when active. */
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int sliderRelief; /* Is slider to be drawn raised, sunken, etc. */
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XColor *troughColorPtr; /* Color for drawing trough. */
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GC troughGC; /* For drawing trough. */
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GC copyGC; /* Used for copying from pixmap onto screen. */
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Tk_Font tkfont; /* Information about text font, or NULL. */
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XColor *textColorPtr; /* Color for drawing text. */
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GC textGC; /* GC for drawing text in normal mode. */
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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 sliderLength; /* Length of slider, measured in pixels along
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* long dimension of scale. */
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int showValue; /* Non-zero means to display the scale value
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* below or to the left of the slider; zero
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* means don't display the value. */
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/*
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* Layout information for horizontal scales, assuming that window
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* gets the size it requested:
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*/
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int horizLabelY; /* Y-coord at which to draw label. */
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int horizValueY; /* Y-coord at which to draw value text. */
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int horizTroughY; /* Y-coord of top of slider trough. */
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int horizTickY; /* Y-coord at which to draw tick text. */
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/*
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* Layout information for vertical scales, assuming that window
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* gets the size it requested:
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*/
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int vertTickRightX; /* X-location of right side of tick-marks. */
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int vertValueRightX; /* X-location of right side of value string. */
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int vertTroughX; /* X-location of scale's slider trough. */
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int vertLabelX; /* X-location of origin of label. */
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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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} TkScale;
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/*
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* Flag bits for scales:
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*
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* REDRAW_SLIDER - 1 means slider (and numerical readout) need
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* to be redrawn.
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* REDRAW_OTHER - 1 means other stuff besides slider and value
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* need to be redrawn.
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* REDRAW_ALL - 1 means the entire widget needs to be redrawn.
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* ACTIVE - 1 means the widget is active (the mouse is
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* in its window).
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* INVOKE_COMMAND - 1 means the scale's command needs to be
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* invoked during the next redisplay (the
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* value of the scale has changed since the
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* last time the command was invoked).
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* SETTING_VAR - 1 means that the associated variable is
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* being set by us, so there's no need for
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* ScaleVarProc to do anything.
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* NEVER_SET - 1 means that the scale's value has never
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* been set before (so must invoke -command and
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* set associated variable even if the value
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* doesn't appear to have changed).
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* GOT_FOCUS - 1 means that the focus is currently in
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* this widget.
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*/
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#define REDRAW_SLIDER 1
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#define REDRAW_OTHER 2
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#define REDRAW_ALL 3
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#define ACTIVE 4
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#define INVOKE_COMMAND 0x10
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#define SETTING_VAR 0x20
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#define NEVER_SET 0x40
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#define GOT_FOCUS 0x80
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/*
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* Symbolic values for the active parts of a slider. These are
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* the values that may be returned by the ScaleElement procedure.
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*/
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#define OTHER 0
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#define TROUGH1 1
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#define SLIDER 2
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#define TROUGH2 3
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/*
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* Space to leave between scale area and text, and between text and
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* edge of window.
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*/
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#define SPACING 2
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/*
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* How many characters of space to provide when formatting the
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* scale's value:
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*/
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#define PRINT_CHARS 150
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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 TkEventuallyRedrawScale _ANSI_ARGS_((TkScale *scalePtr,
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int what));
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EXTERN double TkRoundToResolution _ANSI_ARGS_((TkScale *scalePtr,
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double value));
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EXTERN TkScale * TkpCreateScale _ANSI_ARGS_((Tk_Window tkwin));
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EXTERN void TkpDestroyScale _ANSI_ARGS_((TkScale *scalePtr));
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EXTERN void TkpDisplayScale _ANSI_ARGS_((ClientData clientData));
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EXTERN double TkpPixelToValue _ANSI_ARGS_((TkScale *scalePtr,
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int x, int y));
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EXTERN int TkpScaleElement _ANSI_ARGS_((TkScale *scalePtr,
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int x, int y));
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EXTERN void TkpSetScaleValue _ANSI_ARGS_((TkScale *scalePtr,
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double value, int setVar, int invokeCommand));
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EXTERN int TkpValueToPixel _ANSI_ARGS_((TkScale *scalePtr,
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double value));
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# undef TCL_STORAGE_CLASS
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# define TCL_STORAGE_CLASS DLLIMPORT
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#endif /* _TKSCALE */
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