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Diffstat (limited to 'tk8.6/generic/tkScrollbar.h')
| -rw-r--r-- | tk8.6/generic/tkScrollbar.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/tk8.6/generic/tkScrollbar.h b/tk8.6/generic/tkScrollbar.h new file mode 100644 index 0000000..2d521ae --- /dev/null +++ b/tk8.6/generic/tkScrollbar.h @@ -0,0 +1,183 @@ +/* + * 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 NULL. */ + 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 const 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 */ |