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authorWilliam Joye <wjoye@cfa.harvard.edu>2016-10-18 17:31:55 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2016-10-18 17:31:55 (GMT)
commit39e34335fb6eb6eaf2b7ee51ccf172006dd46fbb (patch)
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Merge commit '6b095f3c8521ca7215e6ff5dcbada52b197ef7d0' as 'tk8.6'
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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.
+ */
+
+#ifndef _TKSCALE
+#define _TKSCALE
+
+#ifndef _TKINT
+#include "tkInt.h"
+#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
+
+/*
+ * Declaration of procedures used in the implementation of the scale widget.
+ */
+
+MODULE_SCOPE void TkEventuallyRedrawScale(TkScale *scalePtr, int what);
+MODULE_SCOPE double TkRoundToResolution(TkScale *scalePtr, double value);
+MODULE_SCOPE TkScale * TkpCreateScale(Tk_Window tkwin);
+MODULE_SCOPE void TkpDestroyScale(TkScale *scalePtr);
+MODULE_SCOPE void TkpDisplayScale(ClientData clientData);
+MODULE_SCOPE int TkpScaleElement(TkScale *scalePtr, int x, int y);
+MODULE_SCOPE void TkScaleSetValue(TkScale *scalePtr, double value,
+ int setVar, int invokeCommand);
+MODULE_SCOPE double TkScalePixelToValue(TkScale *scalePtr, int x, int y);
+MODULE_SCOPE int TkScaleValueToPixel(TkScale *scalePtr, double value);
+
+#endif /* _TKSCALE */