tkScale.h
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- /*
- * tkScale.h --
- *
- * Declarations of types and functions used to implement
- * the scale widget.
- *
- * Copyright (c) 1996 by Sun Microsystems, Inc.
- * Copyright (c) 1999-2000 by Scriptics Corporation.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- *
- * RCS: @(#) $Id: tkScale.h,v 1.8 2000/04/14 08:33:16 hobbs Exp $
- */
- #ifndef _TKSCALE
- #define _TKSCALE
- #ifndef _TK
- #include "tk.h"
- #endif
- #ifdef BUILD_tk
- # undef TCL_STORAGE_CLASS
- # define TCL_STORAGE_CLASS DLLEXPORT
- #endif
- /*
- * Legal values for the "orient" field of TkScale records.
- */
- enum orient {
- ORIENT_HORIZONTAL, ORIENT_VERTICAL
- };
- /*
- * Legal values for the "state" field of TkScale records.
- */
- enum state {
- STATE_ACTIVE, STATE_DISABLED, STATE_NORMAL
- };
- /*
- * A data structure of the following type is kept for each scale
- * widget managed by this file:
- */
- typedef struct TkScale {
- Tk_Window tkwin; /* Window that embodies the scale. 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 scale. */
- Tcl_Command widgetCmd; /* Token for scale's widget command. */
- Tk_OptionTable optionTable; /* Table that defines configuration options
- * available for this widget. */
- enum orient orient; /* Orientation for window (vertical or
- * horizontal). */
- int width; /* Desired narrow dimension of scale,
- * in pixels. */
- int length; /* Desired long dimension of scale,
- * in pixels. */
- double value; /* Current value of scale. */
- Tcl_Obj *varNamePtr; /* Name of variable or NULL.
- * If non-NULL, scale's value tracks
- * the contents of this variable and
- * vice versa. */
- double fromValue; /* Value corresponding to left or top of
- * scale. */
- double toValue; /* Value corresponding to right or bottom
- * of scale. */
- double tickInterval; /* Distance between tick marks;
- * 0 means don't display any tick marks. */
- double resolution; /* If > 0, all values are rounded to an
- * even multiple of this value. */
- int digits; /* Number of significant digits to print
- * in values. 0 means we get to choose the
- * number based on resolution and/or the
- * range of the scale. */
- char format[10]; /* Sprintf conversion specifier computed from
- * digits and other information. */
- double bigIncrement; /* Amount to use for large increments to
- * scale value. (0 means we pick a value). */
- char *command; /* Command prefix to use when invoking Tcl
- * commands because the scale value changed.
- * NULL means don't invoke commands. */
- int repeatDelay; /* How long to wait before auto-repeating
- * on scrolling actions (in ms). */
- int repeatInterval; /* Interval between autorepeats (in ms). */
- char *label; /* Label to display above or to right of
- * scale; NULL means don't display a label. */
- int labelLength; /* Number of non-NULL chars. in label. */
- enum state state; /* Values are active, normal, or disabled.
- * Value of scale cannot be changed when
- * disabled. */
- /*
- * Information used when displaying widget:
- */
- int borderWidth; /* Width of 3-D border around window. */
- Tk_3DBorder bgBorder; /* Used for drawing slider and other
- * background areas. */
- Tk_3DBorder activeBorder; /* For drawing the slider when active. */
- int sliderRelief; /* Is slider to be drawn raised, sunken,
- * etc. */
- XColor *troughColorPtr; /* Color for drawing trough. */
- GC troughGC; /* For drawing trough. */
- GC copyGC; /* Used for copying from pixmap onto screen. */
- Tk_Font tkfont; /* Information about text font, or NULL. */
- XColor *textColorPtr; /* Color for drawing text. */
- GC textGC; /* GC for drawing text in normal mode. */
- 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. */
- Tk_3DBorder highlightBorder;/* Value of -highlightbackground option:
- * specifies background with which to draw 3-D
- * default ring and focus 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 sliderLength; /* Length of slider, measured in pixels along
- * long dimension of scale. */
- int showValue; /* Non-zero means to display the scale value
- * below or to the left of the slider; zero
- * means don't display the value. */
- /*
- * Layout information for horizontal scales, assuming that window
- * gets the size it requested:
- */
- int horizLabelY; /* Y-coord at which to draw label. */
- int horizValueY; /* Y-coord at which to draw value text. */
- int horizTroughY; /* Y-coord of top of slider trough. */
- int horizTickY; /* Y-coord at which to draw tick text. */
- /*
- * Layout information for vertical scales, assuming that window
- * gets the size it requested:
- */
- int vertTickRightX; /* X-location of right side of tick-marks. */
- int vertValueRightX; /* X-location of right side of value string. */
- int vertTroughX; /* X-location of scale's slider trough. */
- int vertLabelX; /* X-location of origin of label. */
- /*
- * Miscellaneous information:
- */
- int fontHeight; /* Height of scale font. */
- Tk_Cursor cursor; /* Current cursor for window, or None. */
- Tcl_Obj *takeFocusPtr; /* Value of -takefocus option; not used in
- * the C code, but used by keyboard traversal
- * scripts. May be NULL. */
- int flags; /* Various flags; see below for
- * definitions. */
- } TkScale;
- /*
- * Flag bits for scales:
- *
- * REDRAW_SLIDER - 1 means slider (and numerical readout) need
- * to be redrawn.
- * REDRAW_OTHER - 1 means other stuff besides slider and value
- * need to be redrawn.
- * REDRAW_ALL - 1 means the entire widget needs to be redrawn.
- * REDRAW_PENDING - 1 means any sort of redraw is pending
- * ACTIVE - 1 means the widget is active (the mouse is
- * in its window).
- * INVOKE_COMMAND - 1 means the scale's command needs to be
- * invoked during the next redisplay (the
- * value of the scale has changed since the
- * last time the command was invoked).
- * SETTING_VAR - 1 means that the associated variable is
- * being set by us, so there's no need for
- * ScaleVarProc to do anything.
- * NEVER_SET - 1 means that the scale's value has never
- * been set before (so must invoke -command and
- * set associated variable even if the value
- * doesn't appear to have changed).
- * GOT_FOCUS - 1 means that the focus is currently in
- * this widget.
- * SCALE_DELETED - 1 means the scale widget is being deleted
- */
- #define REDRAW_SLIDER (1<<0)
- #define REDRAW_OTHER (1<<1)
- #define REDRAW_ALL (REDRAW_OTHER|REDRAW_SLIDER)
- #define REDRAW_PENDING (1<<2)
- #define ACTIVE (1<<3)
- #define INVOKE_COMMAND (1<<4)
- #define SETTING_VAR (1<<5)
- #define NEVER_SET (1<<6)
- #define GOT_FOCUS (1<<7)
- #define SCALE_DELETED (1<<8)
- /*
- * Symbolic values for the active parts of a slider. These are
- * the values that may be returned by the ScaleElement procedure.
- */
- #define OTHER 0
- #define TROUGH1 1
- #define SLIDER 2
- #define TROUGH2 3
- /*
- * Space to leave between scale area and text, and between text and
- * edge of window.
- */
- #define SPACING 2
- /*
- * How many characters of space to provide when formatting the
- * scale's value:
- */
- #define PRINT_CHARS 150
- /*
- * Declaration of procedures used in the implementation of the scale
- * widget.
- */
- EXTERN void TkEventuallyRedrawScale _ANSI_ARGS_((TkScale *scalePtr,
- int what));
- EXTERN double TkRoundToResolution _ANSI_ARGS_((TkScale *scalePtr,
- double value));
- EXTERN TkScale * TkpCreateScale _ANSI_ARGS_((Tk_Window tkwin));
- EXTERN void TkpDestroyScale _ANSI_ARGS_((TkScale *scalePtr));
- EXTERN void TkpDisplayScale _ANSI_ARGS_((ClientData clientData));
- EXTERN int TkpScaleElement _ANSI_ARGS_((TkScale *scalePtr,
- int x, int y));
- EXTERN void TkScaleSetValue _ANSI_ARGS_((TkScale *scalePtr,
- double value, int setVar, int invokeCommand));
- EXTERN double TkScalePixelToValue _ANSI_ARGS_((TkScale *scalePtr,
- int x, int y));
- EXTERN int TkScaleValueToPixel _ANSI_ARGS_((TkScale *scalePtr,
- double value));
- # undef TCL_STORAGE_CLASS
- # define TCL_STORAGE_CLASS DLLIMPORT
- #endif /* _TKSCALE */