EVOLUTION-MANAGER

Edit File: tkScrollbar.h

/* * tkScrollbar.h -- * * Declarations of types and functions used to implement the scrollbar * 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. */ #ifndef _TKSCROLLBAR #define _TKSCROLLBAR #ifndef _TKINT #include "tkInt.h" #endif /* * A data structure of the following type is kept for each scrollbar widget. */ typedef struct TkScrollbar { Tk_Window tkwin; /* Window that embodies the scrollbar. 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 scrollbar. */ Tcl_Command widgetCmd; /* Token for scrollbar's widget command. */ int vertical; /* Non-zero means vertical orientation * requested, zero means horizontal. */ int width; /* Desired narrow dimension of scrollbar, in * pixels. */ char *command; /* Command prefix to use when invoking * scrolling commands. NULL means don't invoke * commands. Malloc'ed. */ int commandSize; /* Number of non-NULL bytes in command. */ int repeatDelay; /* How long to wait before auto-repeating on * scrolling actions (in ms). */ int repeatInterval; /* Interval between autorepeats (in ms). */ int jump; /* Value of -jump option. */ /* * Information used when displaying widget: */ int borderWidth; /* Width of 3-D borders. */ Tk_3DBorder bgBorder; /* Used for drawing background (all flat * surfaces except for trough). */ Tk_3DBorder activeBorder; /* For drawing backgrounds when active (i.e. * when mouse is positioned over element). */ XColor *troughColorPtr; /* Color for drawing trough. */ 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 elementBorderWidth; /* Width of border to draw around elements * inside scrollbar (arrows and slider). -1 * means use borderWidth. */ int arrowLength; /* Length of arrows along long dimension of * scrollbar, including space for a small gap * between the arrow and the slider. * Recomputed on window size changes. */ int sliderFirst; /* Pixel coordinate of top or left edge of * slider area, including border. */ int sliderLast; /* Coordinate of pixel just after bottom or * right edge of slider area, including * border. */ int activeField; /* Names field to be displayed in active * colors, such as TOP_ARROW, or 0 for no * field. */ int activeRelief; /* Value of -activeRelief option: relief to * use for active element. */ /* * Information describing the application related to the scrollbar. This * information is provided by the application by invoking the "set" widget * command. This information can now be provided in two ways: the "old" * form (totalUnits, windowUnits, firstUnit, and lastUnit), or the "new" * form (firstFraction and lastFraction). FirstFraction and lastFraction * will always be valid, but the old-style information is only valid if * the NEW_STYLE_COMMANDS flag is 0. */ int totalUnits; /* Total dimension of application, in units. * Valid only if the NEW_STYLE_COMMANDS flag * isn't set. */ int windowUnits; /* Maximum number of units that can be * displayed in the window at once. Valid only * if the NEW_STYLE_COMMANDS flag isn't set. */ int firstUnit; /* Number of last unit visible in * application's window. Valid only if the * NEW_STYLE_COMMANDS flag isn't set. */ int lastUnit; /* Index of last unit visible in window. * Valid only if the NEW_STYLE_COMMANDS flag * isn't set. */ double firstFraction; /* Position of first visible thing in window, * specified as a fraction between 0 and * 1.0. */ double lastFraction; /* Position of last visible thing in window, * specified as a fraction between 0 and * 1.0. */ /* * 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. */ } TkScrollbar; /* * Legal values for "activeField" field of Scrollbar structures. These are * also the return values from the ScrollbarPosition function. */ #define OUTSIDE 0 #define TOP_ARROW 1 #define TOP_GAP 2 #define SLIDER 3 #define BOTTOM_GAP 4 #define BOTTOM_ARROW 5 /* * Flag bits for scrollbars: * * REDRAW_PENDING: Non-zero means a DoWhenIdle handler has * already been queued to redraw this window. * NEW_STYLE_COMMANDS: Non-zero means the new style of commands * should be used to communicate with the widget: * ".t yview scroll 2 lines", instead of * ".t yview 40", for example. * GOT_FOCUS: Non-zero means this window has the input * focus. */ #define REDRAW_PENDING 1 #define NEW_STYLE_COMMANDS 2 #define GOT_FOCUS 4 /* * Declaration of scrollbar class functions structure * and default scrollbar width, for use in configSpec. */ MODULE_SCOPE Tk_ClassProcs tkpScrollbarProcs; MODULE_SCOPE char tkDefScrollbarWidth[TCL_INTEGER_SPACE]; /* * Declaration of functions used in the implementation of the scrollbar * widget. */ MODULE_SCOPE void TkScrollbarEventProc(ClientData clientData, XEvent *eventPtr); MODULE_SCOPE void TkScrollbarEventuallyRedraw(TkScrollbar *scrollPtr); MODULE_SCOPE void TkpComputeScrollbarGeometry(TkScrollbar *scrollPtr); MODULE_SCOPE TkScrollbar *TkpCreateScrollbar(Tk_Window tkwin); MODULE_SCOPE void TkpDestroyScrollbar(TkScrollbar *scrollPtr); MODULE_SCOPE void TkpDisplayScrollbar(ClientData clientData); MODULE_SCOPE void TkpConfigureScrollbar(TkScrollbar *scrollPtr); MODULE_SCOPE int TkpScrollbarPosition(TkScrollbar *scrollPtr, int x, int y); #endif /* _TKSCROLLBAR */