/* * tkScale.h -- * * Declarations of types and functions used to implement * the scale widget. * * Copyright (c) 1996 by 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: @(#) tkScale.h 1.5 96/07/08 12:56:56 */ #ifndef _TKSCALE #define _TKSCALE #ifndef _TK #include "tk.h" #endif /* * 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_Uid orientUid; /* Orientation for window ("vertical" or * "horizontal"). */ int vertical; /* Non-zero means vertical orientation, * zero means 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. */ char *varName; /* Name of variable (malloc'ed) 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. * Malloc'ed. */ 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. Malloc'ed. */ int labelLength; /* Number of non-NULL chars. in label. */ Tk_Uid state; /* Normal or disabled. Value cannot be * changed when scale is 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. */ 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 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: */ 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. */ int flags; /* Various flags; see below for * definitions. */ #ifdef STk_CODE char *env; /* -variable environment */ #endif } 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. * 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. */ #define REDRAW_SLIDER 1 #define REDRAW_OTHER 2 #define REDRAW_ALL 3 #define ACTIVE 4 #define INVOKE_COMMAND 0x10 #define SETTING_VAR 0x20 #define NEVER_SET 0x40 #define GOT_FOCUS 0x80 /* * 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 scrollbar * 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 double TkpPixelToValue _ANSI_ARGS_((TkScale *scalePtr, int x, int y)); EXTERN int TkpScaleElement _ANSI_ARGS_((TkScale *scalePtr, int x, int y)); EXTERN void TkpSetScaleValue _ANSI_ARGS_((TkScale *scalePtr, double value, int setVar, int invokeCommand)); EXTERN int TkpValueToPixel _ANSI_ARGS_((TkScale *scalePtr, double value)); #endif /* _TKSCALE */