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Diffstat (limited to 'generic/tkScale.h')
| -rw-r--r-- | generic/tkScale.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/generic/tkScale.h b/generic/tkScale.h new file mode 100644 index 0000000..dba6f68 --- /dev/null +++ b/generic/tkScale.h @@ -0,0 +1,225 @@ +/* + * 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. */ +} 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 */ |