1482 lines
46 KiB
C
1482 lines
46 KiB
C
/*
|
||
* tkScale.c --
|
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*
|
||
* This module implements a scale widgets for the Tk toolkit.
|
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* A scale displays a slider that can be adjusted to change a
|
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* value; it also displays numeric labels and a textual label,
|
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* if desired.
|
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*
|
||
* Copyright (c) 1990-1993 The Regents of the University of California.
|
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* All rights reserved.
|
||
*
|
||
* Permission is hereby granted, without written agreement and without
|
||
* license or royalty fees, to use, copy, modify, and distribute this
|
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* software and its documentation for any purpose, provided that the
|
||
* above copyright notice and the following two paragraphs appear in
|
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* all copies of this software.
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*
|
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* IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
|
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* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
|
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* CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
|
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
|
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* ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
|
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
|
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|
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#ifndef lint
|
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static char rcsid[] = "$Header: /user6/ouster/wish/RCS/tkScale.c,v 1.40 93/08/16 15:47:37 ouster Exp $ SPRITE (Berkeley)";
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#endif
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|
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#include "tkConfig.h"
|
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#include "default.h"
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#include "tkInt.h"
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|
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/*
|
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* A data structure of the following type is kept for each scale
|
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* widget managed by this file:
|
||
*/
|
||
|
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typedef struct {
|
||
Tk_Window tkwin; /* Window that embodies the scale. NULL
|
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* means that the window has been destroyed
|
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* but the data structures haven't yet been
|
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* cleaned up.*/
|
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Display *display; /* Display containing widget. Used, among
|
||
* other things, so that resources can be
|
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* freed even after tkwin has gone away. */
|
||
Tcl_Interp *interp; /* Interpreter associated with scale. */
|
||
Tk_Uid orientUid; /* Orientation for window ("vertical" or
|
||
* "horizontal"). */
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||
int vertical; /* Non-zero means vertical orientation,
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* zero means horizontal. */
|
||
int value; /* Current value of scale. */
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||
int fromValue; /* Value corresponding to left or top of
|
||
* scale. */
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int toValue; /* Value corresponding to right or bottom
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* of scale. */
|
||
int tickInterval; /* Distance between tick marks; 0 means
|
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* don't display any tick marks. */
|
||
char *command; /* Command prefix to use when invoking Tcl
|
||
* commands because the scale value changed.
|
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* NULL means don't invoke commands.
|
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* Malloc'ed. */
|
||
int commandLength; /* Number of non-NULL bytes in command. */
|
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char *label; /* Label to display above or to right of
|
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* scale; NULL means don't display a
|
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* label. Malloc'ed. */
|
||
int labelLength; /* Number of non-NULL chars. in label. */
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||
Tk_Uid state; /* Normal or disabled. Value cannot be
|
||
* changed when scale is disabled. */
|
||
|
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/*
|
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* Information used when displaying widget:
|
||
*/
|
||
|
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int borderWidth; /* Width of 3-D border around window. */
|
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Tk_3DBorder bgBorder; /* Used for drawing background. */
|
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Tk_3DBorder sliderBorder; /* Used for drawing slider in normal mode. */
|
||
Tk_3DBorder activeBorder; /* Used for drawing slider when active (i.e.
|
||
* when mouse is in window). */
|
||
XFontStruct *fontPtr; /* Information about text font, or NULL. */
|
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XColor *textColorPtr; /* Color for drawing text. */
|
||
GC textGC; /* GC for drawing text in normal mode. */
|
||
int width; /* Desired narrow dimension of scale,
|
||
* in pixels. */
|
||
int length; /* Desired long dimension of scale,
|
||
* in pixels. */
|
||
int relief; /* Indicates whether window as a whole is
|
||
* raised, sunken, or flat. */
|
||
int offset; /* Zero if relief is TK_RELIEF_FLAT,
|
||
* borderWidth otherwise. Indicates how
|
||
* much interior stuff must be offset from
|
||
* outside edges to leave room for border. */
|
||
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. */
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int tickPixels; /* Number of pixels required for widest tick
|
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* mark. 0 means don't display ticks.*/
|
||
int valuePixels; /* Number of pixels required for value text. */
|
||
int labelPixels; /* Number of pixels required for label. 0
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* means don't display label. */
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||
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/*
|
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* Miscellaneous information:
|
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*/
|
||
|
||
Cursor cursor; /* Current cursor for window, or None. */
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int flags; /* Various flags; see below for
|
||
* definitions. */
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} Scale;
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||
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/*
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* Flag bits for scales:
|
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*
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* REDRAW_SLIDER - 1 means slider (and numerical readout) need
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* to be redrawn.
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* REDRAW_OTHER - 1 means other stuff besides slider and value
|
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* need to be redrawn.
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* REDRAW_ALL - 1 means the entire widget needs to be redrawn.
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* ACTIVE - 1 means the widget is active (the mouse is
|
||
* in its window).
|
||
* BUTTON_PRESSED - 1 means a button press is in progress, so
|
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* slider should appear depressed and should be
|
||
* draggable.
|
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* INVOKE_COMMAND - 1 means the scale's command needs to be
|
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* invoked during the next redisplay (the
|
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* value of the scale has changed since the
|
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* last time the command was invoked).
|
||
*/
|
||
|
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#define REDRAW_SLIDER 1
|
||
#define REDRAW_OTHER 2
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#define REDRAW_ALL 3
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#define ACTIVE 4
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#define BUTTON_PRESSED 8
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#define INVOKE_COMMAND 16
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/*
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* Space to leave between scale area and text.
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*/
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||
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#define SPACING 2
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||
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/*
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* Information used for argv parsing.
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||
*/
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||
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static Tk_ConfigSpec configSpecs[] = {
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{TK_CONFIG_BORDER, "-activeforeground", "activeForeground", "Background",
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DEF_SCALE_ACTIVE_FG_COLOR, Tk_Offset(Scale, activeBorder),
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TK_CONFIG_COLOR_ONLY},
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{TK_CONFIG_BORDER, "-activeforeground", "activeForeground", "Background",
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DEF_SCALE_ACTIVE_FG_MONO, Tk_Offset(Scale, activeBorder),
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TK_CONFIG_MONO_ONLY},
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{TK_CONFIG_BORDER, "-background", "background", "Background",
|
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DEF_SCALE_BG_COLOR, Tk_Offset(Scale, bgBorder),
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TK_CONFIG_COLOR_ONLY},
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{TK_CONFIG_BORDER, "-background", "background", "Background",
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DEF_SCALE_BG_MONO, Tk_Offset(Scale, bgBorder),
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TK_CONFIG_MONO_ONLY},
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{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
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||
(char *) NULL, 0, 0},
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{TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
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(char *) NULL, 0, 0},
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||
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
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||
DEF_SCALE_BORDER_WIDTH, Tk_Offset(Scale, borderWidth), 0},
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{TK_CONFIG_STRING, "-command", "command", "Command",
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||
DEF_SCALE_COMMAND, Tk_Offset(Scale, command), TK_CONFIG_NULL_OK},
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||
{TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
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||
DEF_SCALE_CURSOR, Tk_Offset(Scale, cursor), TK_CONFIG_NULL_OK},
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{TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
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(char *) NULL, 0, 0},
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{TK_CONFIG_FONT, "-font", "font", "Font",
|
||
DEF_SCALE_FONT, Tk_Offset(Scale, fontPtr),
|
||
0},
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||
{TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
|
||
DEF_SCALE_FG_COLOR, Tk_Offset(Scale, textColorPtr),
|
||
TK_CONFIG_COLOR_ONLY},
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{TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
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DEF_SCALE_FG_MONO, Tk_Offset(Scale, textColorPtr),
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TK_CONFIG_MONO_ONLY},
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{TK_CONFIG_INT, "-from", "from", "From",
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DEF_SCALE_FROM, Tk_Offset(Scale, fromValue), 0},
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{TK_CONFIG_STRING, "-label", "label", "Label",
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DEF_SCALE_LABEL, Tk_Offset(Scale, label), TK_CONFIG_NULL_OK},
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||
{TK_CONFIG_PIXELS, "-length", "length", "Length",
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DEF_SCALE_LENGTH, Tk_Offset(Scale, length), 0},
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{TK_CONFIG_UID, "-orient", "orient", "Orient",
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DEF_SCALE_ORIENT, Tk_Offset(Scale, orientUid), 0},
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{TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
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DEF_SCALE_RELIEF, Tk_Offset(Scale, relief), 0},
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{TK_CONFIG_BOOLEAN, "-showvalue", "showValue", "ShowValue",
|
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DEF_SCALE_SHOW_VALUE, Tk_Offset(Scale, showValue), 0},
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{TK_CONFIG_BORDER, "-sliderforeground", "sliderForeground", "Background",
|
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DEF_SCALE_SLIDER_FG_COLOR, Tk_Offset(Scale, sliderBorder),
|
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TK_CONFIG_COLOR_ONLY},
|
||
{TK_CONFIG_BORDER, "-sliderforeground", "sliderForeground", "Background",
|
||
DEF_SCALE_SLIDER_FG_MONO, Tk_Offset(Scale, sliderBorder),
|
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TK_CONFIG_MONO_ONLY},
|
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{TK_CONFIG_PIXELS, "-sliderlength", "sliderLength", "SliderLength",
|
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DEF_SCALE_SLIDER_LENGTH, Tk_Offset(Scale, sliderLength), 0},
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{TK_CONFIG_UID, "-state", "state", "State",
|
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DEF_SCALE_STATE, Tk_Offset(Scale, state), 0},
|
||
{TK_CONFIG_INT, "-tickinterval", "tickInterval", "TickInterval",
|
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DEF_SCALE_TICK_INTERVAL, Tk_Offset(Scale, tickInterval), 0},
|
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{TK_CONFIG_INT, "-to", "to", "To",
|
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DEF_SCALE_TO, Tk_Offset(Scale, toValue), 0},
|
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{TK_CONFIG_PIXELS, "-width", "width", "Width",
|
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DEF_SCALE_WIDTH, Tk_Offset(Scale, width), 0},
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{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
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(char *) NULL, 0, 0}
|
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};
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||
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/*
|
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* Forward declarations for procedures defined later in this file:
|
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*/
|
||
|
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static void ComputeScaleGeometry _ANSI_ARGS_((Scale *scalePtr));
|
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static int ConfigureScale _ANSI_ARGS_((Tcl_Interp *interp,
|
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Scale *scalePtr, int argc, char **argv,
|
||
int flags));
|
||
static void DestroyScale _ANSI_ARGS_((ClientData clientData));
|
||
static void DisplayHorizontalScale _ANSI_ARGS_((
|
||
ClientData clientData));
|
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static void DisplayHorizontalValue _ANSI_ARGS_((Scale *scalePtr,
|
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int value, int bottom));
|
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static void DisplayVerticalScale _ANSI_ARGS_((
|
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ClientData clientData));
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static void DisplayVerticalValue _ANSI_ARGS_((Scale *scalePtr,
|
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int value, int rightEdge));
|
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static void EventuallyRedrawScale _ANSI_ARGS_((Scale *scalePtr,
|
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int what));
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static int PixelToValue _ANSI_ARGS_((Scale *scalePtr, int x,
|
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int y));
|
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static void ScaleEventProc _ANSI_ARGS_((ClientData clientData,
|
||
XEvent *eventPtr));
|
||
static void ScaleMouseProc _ANSI_ARGS_((ClientData clientData,
|
||
XEvent *eventPtr));
|
||
static int ScaleWidgetCmd _ANSI_ARGS_((ClientData clientData,
|
||
Tcl_Interp *interp, int argc, char **argv));
|
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static void SetScaleValue _ANSI_ARGS_((Scale *scalePtr,
|
||
int value));
|
||
static int ValueToPixel _ANSI_ARGS_((Scale *scalePtr, int value));
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* Tk_ScaleCmd --
|
||
*
|
||
* This procedure is invoked to process the "scale" Tcl
|
||
* command. See the user documentation for details on what
|
||
* it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
int
|
||
Tk_ScaleCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Main window associated with
|
||
* interpreter. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
Tk_Window tkwin = (Tk_Window) clientData;
|
||
register Scale *scalePtr;
|
||
Tk_Window new;
|
||
|
||
if (argc < 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " pathName ?options?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
|
||
if (new == NULL) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Initialize fields that won't be initialized by ConfigureScale,
|
||
* or which ConfigureScale expects to have reasonable values
|
||
* (e.g. resource pointers).
|
||
*/
|
||
|
||
scalePtr = (Scale *) ckalloc(sizeof(Scale));
|
||
scalePtr->tkwin = new;
|
||
scalePtr->display = Tk_Display(new);
|
||
scalePtr->interp = interp;
|
||
scalePtr->orientUid = NULL;
|
||
scalePtr->vertical = 0;
|
||
scalePtr->value = 0;
|
||
scalePtr->fromValue = 0;
|
||
scalePtr->toValue = 0;
|
||
scalePtr->tickInterval = 0;
|
||
scalePtr->command = NULL;
|
||
scalePtr->commandLength = 0;
|
||
scalePtr->label = NULL;
|
||
scalePtr->labelLength = 0;
|
||
scalePtr->state = tkNormalUid;
|
||
scalePtr->borderWidth = 0;
|
||
scalePtr->bgBorder = NULL;
|
||
scalePtr->sliderBorder = NULL;
|
||
scalePtr->activeBorder = NULL;
|
||
scalePtr->fontPtr = NULL;
|
||
scalePtr->textColorPtr = NULL;
|
||
scalePtr->textGC = None;
|
||
scalePtr->width = 0;
|
||
scalePtr->length = 0;
|
||
scalePtr->relief = TK_RELIEF_FLAT;
|
||
scalePtr->offset = 0;
|
||
scalePtr->sliderLength = 0;
|
||
scalePtr->showValue = 0;
|
||
scalePtr->tickPixels = 0;
|
||
scalePtr->valuePixels = 0;
|
||
scalePtr->labelPixels = 0;
|
||
scalePtr->cursor = None;
|
||
scalePtr->flags = 0;
|
||
|
||
Tk_SetClass(scalePtr->tkwin, "Scale");
|
||
Tk_CreateEventHandler(scalePtr->tkwin, ExposureMask|StructureNotifyMask,
|
||
ScaleEventProc, (ClientData) scalePtr);
|
||
Tk_CreateEventHandler(scalePtr->tkwin, EnterWindowMask|LeaveWindowMask
|
||
|PointerMotionMask|ButtonPressMask|ButtonReleaseMask,
|
||
ScaleMouseProc, (ClientData) scalePtr);
|
||
Tcl_CreateCommand(interp, Tk_PathName(scalePtr->tkwin), ScaleWidgetCmd,
|
||
(ClientData) scalePtr, (void (*)()) NULL);
|
||
if (ConfigureScale(interp, scalePtr, argc-2, argv+2, 0) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
|
||
interp->result = Tk_PathName(scalePtr->tkwin);
|
||
return TCL_OK;
|
||
|
||
error:
|
||
Tk_DestroyWindow(scalePtr->tkwin);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleWidgetCmd --
|
||
*
|
||
* This procedure is invoked to process the Tcl command
|
||
* that corresponds to a widget managed by this module.
|
||
* See the user documentation for details on what it does.
|
||
*
|
||
* Results:
|
||
* A standard Tcl result.
|
||
*
|
||
* Side effects:
|
||
* See the user documentation.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ScaleWidgetCmd(clientData, interp, argc, argv)
|
||
ClientData clientData; /* Information about scale
|
||
* widget. */
|
||
Tcl_Interp *interp; /* Current interpreter. */
|
||
int argc; /* Number of arguments. */
|
||
char **argv; /* Argument strings. */
|
||
{
|
||
register Scale *scalePtr = (Scale *) clientData;
|
||
int result = TCL_OK;
|
||
int length;
|
||
char c;
|
||
|
||
if (argc < 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " option ?arg arg ...?\"", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
Tk_Preserve((ClientData) scalePtr);
|
||
c = argv[1][0];
|
||
length = strlen(argv[1]);
|
||
if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)) {
|
||
if (argc == 2) {
|
||
result = Tk_ConfigureInfo(interp, scalePtr->tkwin, configSpecs,
|
||
(char *) scalePtr, (char *) NULL, 0);
|
||
} else if (argc == 3) {
|
||
result = Tk_ConfigureInfo(interp, scalePtr->tkwin, configSpecs,
|
||
(char *) scalePtr, argv[2], 0);
|
||
} else {
|
||
result = ConfigureScale(interp, scalePtr, argc-2, argv+2,
|
||
TK_CONFIG_ARGV_ONLY);
|
||
}
|
||
} else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
|
||
if (argc != 2) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " get\"", (char *) NULL);
|
||
goto error;
|
||
}
|
||
sprintf(interp->result, "%d", scalePtr->value);
|
||
} else if ((c == 's') && (strncmp(argv[1], "set", length) == 0)) {
|
||
int value;
|
||
|
||
if (argc != 3) {
|
||
Tcl_AppendResult(interp, "wrong # args: should be \"",
|
||
argv[0], " set value\"", (char *) NULL);
|
||
goto error;
|
||
}
|
||
if (Tcl_GetInt(interp, argv[2], &value) != TCL_OK) {
|
||
goto error;
|
||
}
|
||
if (scalePtr->state == tkNormalUid) {
|
||
if ((value < scalePtr->fromValue)
|
||
^ (scalePtr->toValue < scalePtr->fromValue)) {
|
||
value = scalePtr->fromValue;
|
||
}
|
||
if ((value > scalePtr->toValue)
|
||
^ (scalePtr->toValue < scalePtr->fromValue)) {
|
||
value = scalePtr->toValue;
|
||
}
|
||
SetScaleValue(scalePtr, value);
|
||
}
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad option \"", argv[1],
|
||
"\": must be configure, get, or set", (char *) NULL);
|
||
goto error;
|
||
}
|
||
Tk_Release((ClientData) scalePtr);
|
||
return result;
|
||
|
||
error:
|
||
Tk_Release((ClientData) scalePtr);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DestroyScale --
|
||
*
|
||
* This procedure is invoked by Tk_EventuallyFree or Tk_Release
|
||
* to clean up the internal structure of a button at a safe time
|
||
* (when no-one is using it anymore).
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Everything associated with the scale is freed up.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DestroyScale(clientData)
|
||
ClientData clientData; /* Info about scale widget. */
|
||
{
|
||
register Scale *scalePtr = (Scale *) clientData;
|
||
|
||
/*
|
||
* Free up all the stuff that requires special handling, then
|
||
* let Tk_FreeOptions handle all the standard option-related
|
||
* stuff.
|
||
*/
|
||
|
||
if (scalePtr->textGC != None) {
|
||
Tk_FreeGC(scalePtr->display, scalePtr->textGC);
|
||
}
|
||
Tk_FreeOptions(configSpecs, (char *) scalePtr, scalePtr->display, 0);
|
||
ckfree((char *) scalePtr);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ConfigureScale --
|
||
*
|
||
* This procedure is called to process an argv/argc list, plus
|
||
* the Tk option database, in order to configure (or
|
||
* reconfigure) a scale widget.
|
||
*
|
||
* Results:
|
||
* The return value is a standard Tcl result. If TCL_ERROR is
|
||
* returned, then interp->result contains an error message.
|
||
*
|
||
* Side effects:
|
||
* Configuration information, such as colors, border width,
|
||
* etc. get set for scalePtr; old resources get freed,
|
||
* if there were any.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ConfigureScale(interp, scalePtr, argc, argv, flags)
|
||
Tcl_Interp *interp; /* Used for error reporting. */
|
||
register Scale *scalePtr; /* Information about widget; may or may
|
||
* not already have values for some fields. */
|
||
int argc; /* Number of valid entries in argv. */
|
||
char **argv; /* Arguments. */
|
||
int flags; /* Flags to pass to Tk_ConfigureWidget. */
|
||
{
|
||
XGCValues gcValues;
|
||
GC newGC;
|
||
int length;
|
||
|
||
if (Tk_ConfigureWidget(interp, scalePtr->tkwin, configSpecs,
|
||
argc, argv, (char *) scalePtr, flags) != TCL_OK) {
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* A few options need special processing, such as parsing the
|
||
* orientation or setting the background from a 3-D border.
|
||
*/
|
||
|
||
length = strlen(scalePtr->orientUid);
|
||
if (strncmp(scalePtr->orientUid, "vertical", length) == 0) {
|
||
scalePtr->vertical = 1;
|
||
} else if (strncmp(scalePtr->orientUid, "horizontal", length) == 0) {
|
||
scalePtr->vertical = 0;
|
||
} else {
|
||
Tcl_AppendResult(interp, "bad orientation \"", scalePtr->orientUid,
|
||
"\": must be vertical or horizontal", (char *) NULL);
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
if ((scalePtr->state != tkNormalUid)
|
||
&& (scalePtr->state != tkDisabledUid)) {
|
||
Tcl_AppendResult(interp, "bad state value \"", scalePtr->state,
|
||
"\": must be normal or disabled", (char *) NULL);
|
||
scalePtr->state = tkNormalUid;
|
||
return TCL_ERROR;
|
||
}
|
||
|
||
/*
|
||
* Make sure that the tick interval has the right sign so that
|
||
* addition moves from fromValue to toValue.
|
||
*/
|
||
|
||
if ((scalePtr->tickInterval < 0)
|
||
^ ((scalePtr->toValue - scalePtr->fromValue) < 0)) {
|
||
scalePtr->tickInterval = -scalePtr->tickInterval;
|
||
}
|
||
|
||
/*
|
||
* Set the scale value to itself; all this does is to make sure
|
||
* that the scale's value is within the new acceptable range for
|
||
* the scale.
|
||
*/
|
||
|
||
SetScaleValue(scalePtr, scalePtr->value);
|
||
|
||
if (scalePtr->command != NULL) {
|
||
scalePtr->commandLength = strlen(scalePtr->command);
|
||
} else {
|
||
scalePtr->commandLength = 0;
|
||
}
|
||
|
||
if (scalePtr->label != NULL) {
|
||
scalePtr->labelLength = strlen(scalePtr->label);
|
||
} else {
|
||
scalePtr->labelLength = 0;
|
||
}
|
||
|
||
Tk_SetBackgroundFromBorder(scalePtr->tkwin, scalePtr->bgBorder);
|
||
|
||
gcValues.font = scalePtr->fontPtr->fid;
|
||
gcValues.foreground = scalePtr->textColorPtr->pixel;
|
||
newGC = Tk_GetGC(scalePtr->tkwin, GCForeground|GCFont, &gcValues);
|
||
if (scalePtr->textGC != None) {
|
||
Tk_FreeGC(scalePtr->display, scalePtr->textGC);
|
||
}
|
||
scalePtr->textGC = newGC;
|
||
|
||
if (scalePtr->relief != TK_RELIEF_FLAT) {
|
||
scalePtr->offset = scalePtr->borderWidth;
|
||
} else {
|
||
scalePtr->offset = 0;
|
||
}
|
||
|
||
/*
|
||
* Recompute display-related information, and let the geometry
|
||
* manager know how much space is needed now.
|
||
*/
|
||
|
||
ComputeScaleGeometry(scalePtr);
|
||
|
||
EventuallyRedrawScale(scalePtr, REDRAW_ALL);
|
||
return TCL_OK;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ComputeScaleGeometry --
|
||
*
|
||
* This procedure is called to compute various geometrical
|
||
* information for a scale, such as where various things get
|
||
* displayed. It's called when the window is reconfigured.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Display-related numbers get changed in *scrollPtr. The
|
||
* geometry manager gets told about the window's preferred size.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ComputeScaleGeometry(scalePtr)
|
||
register Scale *scalePtr; /* Information about widget. */
|
||
{
|
||
XCharStruct bbox;
|
||
char valueString[30];
|
||
int dummy, lineHeight;
|
||
|
||
/*
|
||
* Horizontal scales are simpler than vertical ones because
|
||
* all sizes are the same (the height of a line of text);
|
||
* handle them first and then quit.
|
||
*/
|
||
|
||
if (!scalePtr->vertical) {
|
||
lineHeight = scalePtr->fontPtr->ascent + scalePtr->fontPtr->descent;
|
||
if (scalePtr->tickInterval != 0) {
|
||
scalePtr->tickPixels = lineHeight;
|
||
} else {
|
||
scalePtr->tickPixels = 0;
|
||
}
|
||
if (scalePtr->showValue) {
|
||
scalePtr->valuePixels = lineHeight + SPACING;
|
||
} else {
|
||
scalePtr->valuePixels = 0;
|
||
}
|
||
if (scalePtr->labelLength != 0) {
|
||
scalePtr->labelPixels = lineHeight;
|
||
} else {
|
||
scalePtr->labelPixels = 0;
|
||
}
|
||
|
||
Tk_GeometryRequest(scalePtr->tkwin,
|
||
scalePtr->length + 2*scalePtr->offset,
|
||
scalePtr->tickPixels + scalePtr->valuePixels
|
||
+ scalePtr->width + 2*scalePtr->borderWidth
|
||
+ scalePtr->labelPixels + 2*scalePtr->offset);
|
||
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->borderWidth);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Vertical scale: compute the amount of space needed for tick marks
|
||
* and current value by formatting strings for the two end points;
|
||
* use whichever length is longer.
|
||
*/
|
||
|
||
sprintf(valueString, "%d", scalePtr->fromValue);
|
||
XTextExtents(scalePtr->fontPtr, valueString, strlen(valueString),
|
||
&dummy, &dummy, &dummy, &bbox);
|
||
scalePtr->tickPixels = bbox.rbearing - bbox.lbearing;
|
||
sprintf(valueString, "%d", scalePtr->toValue);
|
||
XTextExtents(scalePtr->fontPtr, valueString, strlen(valueString),
|
||
&dummy, &dummy, &dummy, &bbox);
|
||
if (scalePtr->tickPixels < bbox.rbearing - bbox.lbearing) {
|
||
scalePtr->tickPixels = bbox.rbearing - bbox.lbearing;
|
||
}
|
||
|
||
/*
|
||
* Pad the value with a bit of extra space for prettier printing.
|
||
*/
|
||
|
||
scalePtr->tickPixels += scalePtr->fontPtr->ascent/2;
|
||
scalePtr->valuePixels = scalePtr->tickPixels;
|
||
if (scalePtr->tickInterval == 0) {
|
||
scalePtr->tickPixels = 0;
|
||
}
|
||
if (!scalePtr->showValue) {
|
||
scalePtr->valuePixels = 0;
|
||
}
|
||
|
||
if (scalePtr->labelLength == 0) {
|
||
scalePtr->labelPixels = 0;
|
||
} else {
|
||
XTextExtents(scalePtr->fontPtr, scalePtr->label,
|
||
scalePtr->labelLength, &dummy, &dummy, &dummy, &bbox);
|
||
scalePtr->labelPixels = bbox.rbearing - bbox.lbearing
|
||
+ scalePtr->fontPtr->ascent;
|
||
}
|
||
Tk_GeometryRequest(scalePtr->tkwin, 4*scalePtr->borderWidth
|
||
+ scalePtr->tickPixels + scalePtr->valuePixels + SPACING
|
||
+ scalePtr->width + scalePtr->labelPixels,
|
||
scalePtr->length);
|
||
Tk_SetInternalBorder(scalePtr->tkwin, scalePtr->borderWidth);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DisplayVerticalScale --
|
||
*
|
||
* This procedure redraws the contents of a vertical scale
|
||
* window. It is invoked as a do-when-idle handler, so it only
|
||
* runs when there's nothing else for the application to do.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Information appears on the screen.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayVerticalScale(clientData)
|
||
ClientData clientData; /* Information about widget. */
|
||
{
|
||
register Scale *scalePtr = (Scale *) clientData;
|
||
register Tk_Window tkwin = scalePtr->tkwin;
|
||
int tickRightEdge, valueRightEdge, labelLeftEdge, scaleLeftEdge;
|
||
int totalPixels, x, y, width, height, shadowWidth, tickValue;
|
||
int relief, result;
|
||
Tk_3DBorder sliderBorder;
|
||
char string[20];
|
||
|
||
if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
|
||
goto done;
|
||
}
|
||
|
||
/*
|
||
* Invoke the scale's command if needed.
|
||
*/
|
||
|
||
if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) {
|
||
sprintf(string, " %d", scalePtr->value);
|
||
result = Tcl_VarEval(scalePtr->interp, scalePtr->command, string,
|
||
(char *) NULL);
|
||
if (result != TCL_OK) {
|
||
Tcl_AddErrorInfo(scalePtr->interp,
|
||
"\n (command executed by scale)");
|
||
Tk_BackgroundError(scalePtr->interp);
|
||
}
|
||
}
|
||
scalePtr->flags &= ~INVOKE_COMMAND;
|
||
|
||
/*
|
||
* Scanning from left to right across the window, the window
|
||
* will contain four columns: ticks, value, scale, and label.
|
||
* Compute the x-coordinate for each of the columns.
|
||
*/
|
||
|
||
totalPixels = scalePtr->tickPixels + scalePtr->valuePixels
|
||
+ 2*scalePtr->borderWidth + scalePtr->width
|
||
+ 2*SPACING + scalePtr->labelPixels;
|
||
tickRightEdge = (Tk_Width(tkwin) - totalPixels)/2 + scalePtr->tickPixels;
|
||
valueRightEdge = tickRightEdge + scalePtr->valuePixels;
|
||
scaleLeftEdge = valueRightEdge + SPACING;
|
||
labelLeftEdge = scaleLeftEdge + 2*scalePtr->borderWidth
|
||
+ scalePtr->width + scalePtr->fontPtr->ascent/2;
|
||
|
||
/*
|
||
* Display the information from left to right across the window.
|
||
*/
|
||
|
||
if (scalePtr->flags & REDRAW_OTHER) {
|
||
XClearWindow(scalePtr->display, Tk_WindowId(tkwin));
|
||
|
||
/*
|
||
* Display the tick marks.
|
||
*/
|
||
|
||
if (scalePtr->tickPixels != 0) {
|
||
for (tickValue = scalePtr->fromValue; ;
|
||
tickValue += scalePtr->tickInterval) {
|
||
if (scalePtr->toValue > scalePtr->fromValue) {
|
||
if (tickValue > scalePtr->toValue) {
|
||
break;
|
||
}
|
||
} else {
|
||
if (tickValue < scalePtr->toValue) {
|
||
break;
|
||
}
|
||
}
|
||
DisplayVerticalValue(scalePtr, tickValue, tickRightEdge);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Display the value, if it is desired. If not redisplaying the
|
||
* entire window, clear the area of the value to get rid of the
|
||
* old value displayed there.
|
||
*/
|
||
|
||
if (scalePtr->showValue) {
|
||
if (!(scalePtr->flags & REDRAW_OTHER)) {
|
||
XClearArea(scalePtr->display, Tk_WindowId(tkwin),
|
||
valueRightEdge-scalePtr->valuePixels, scalePtr->offset,
|
||
scalePtr->valuePixels,
|
||
Tk_Height(tkwin) - 2*scalePtr->offset, False);
|
||
}
|
||
DisplayVerticalValue(scalePtr, scalePtr->value, valueRightEdge);
|
||
}
|
||
|
||
/*
|
||
* Display the scale and the slider. If not redisplaying the
|
||
* entire window, must clear the trench area to erase the old
|
||
* slider, but don't need to redraw the border.
|
||
*/
|
||
|
||
if (scalePtr->flags & REDRAW_OTHER) {
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->bgBorder, scaleLeftEdge, scalePtr->offset,
|
||
scalePtr->width + 2*scalePtr->borderWidth,
|
||
Tk_Height(tkwin) - 2*scalePtr->offset, scalePtr->borderWidth,
|
||
TK_RELIEF_SUNKEN);
|
||
} else {
|
||
XClearArea(scalePtr->display, Tk_WindowId(tkwin),
|
||
scaleLeftEdge + scalePtr->borderWidth,
|
||
scalePtr->offset + scalePtr->borderWidth,
|
||
scalePtr->width,
|
||
Tk_Height(tkwin) - 2*scalePtr->offset
|
||
- 2*scalePtr->borderWidth, False);
|
||
}
|
||
if (scalePtr->flags & ACTIVE) {
|
||
sliderBorder = scalePtr->activeBorder;
|
||
} else {
|
||
sliderBorder = scalePtr->sliderBorder;
|
||
}
|
||
width = scalePtr->width;
|
||
height = scalePtr->sliderLength/2;
|
||
x = scaleLeftEdge + scalePtr->borderWidth;
|
||
y = ValueToPixel(scalePtr, scalePtr->value) - height;
|
||
shadowWidth = scalePtr->borderWidth/2;
|
||
if (shadowWidth == 0) {
|
||
shadowWidth = 1;
|
||
}
|
||
relief = (scalePtr->flags & BUTTON_PRESSED) ? TK_RELIEF_SUNKEN
|
||
: TK_RELIEF_RAISED;
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x, y, width, 2*height, shadowWidth, relief);
|
||
x += shadowWidth;
|
||
y += shadowWidth;
|
||
width -= 2*shadowWidth;
|
||
height -= shadowWidth;
|
||
Tk_Fill3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x, y, width, height, shadowWidth, relief);
|
||
Tk_Fill3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x, y+height, width, height, shadowWidth, relief);
|
||
|
||
/*
|
||
* Draw the label to the right of the scale.
|
||
*/
|
||
|
||
if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelPixels != 0)) {
|
||
XDrawString(scalePtr->display, Tk_WindowId(scalePtr->tkwin),
|
||
scalePtr->textGC, labelLeftEdge,
|
||
scalePtr->offset + (3*scalePtr->fontPtr->ascent)/2,
|
||
scalePtr->label, scalePtr->labelLength);
|
||
}
|
||
|
||
/*
|
||
* Draw the window border.
|
||
*/
|
||
|
||
if ((scalePtr->flags & REDRAW_OTHER)
|
||
&& (scalePtr->relief != TK_RELIEF_FLAT)) {
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->bgBorder, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin),
|
||
scalePtr->borderWidth, scalePtr->relief);
|
||
}
|
||
|
||
done:
|
||
scalePtr->flags &= ~REDRAW_ALL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisplayVerticalValue --
|
||
*
|
||
* This procedure is called to display values (scale readings)
|
||
* for vertically-oriented scales.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The numerical value corresponding to value is displayed with
|
||
* its right edge at "rightEdge", and at a vertical position in
|
||
* the scale that corresponds to "value".
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayVerticalValue(scalePtr, value, rightEdge)
|
||
register Scale *scalePtr; /* Information about widget in which to
|
||
* display value. */
|
||
int value; /* Y-coordinate of number to display,
|
||
* specified in application coords, not
|
||
* in pixels (we'll compute pixels). */
|
||
int rightEdge; /* X-coordinate of right edge of text,
|
||
* specified in pixels. */
|
||
{
|
||
register Tk_Window tkwin = scalePtr->tkwin;
|
||
int y, dummy, length;
|
||
char valueString[30];
|
||
XCharStruct bbox;
|
||
|
||
y = ValueToPixel(scalePtr, value) + scalePtr->fontPtr->ascent/2;
|
||
sprintf(valueString, "%d", value);
|
||
length = strlen(valueString);
|
||
XTextExtents(scalePtr->fontPtr, valueString, length,
|
||
&dummy, &dummy, &dummy, &bbox);
|
||
|
||
/*
|
||
* Adjust the y-coordinate if necessary to keep the text entirely
|
||
* inside the window.
|
||
*/
|
||
|
||
if ((y - bbox.ascent) < scalePtr->offset) {
|
||
y = scalePtr->offset + bbox.ascent;
|
||
}
|
||
if ((y + bbox.descent) > (Tk_Height(tkwin) - scalePtr->offset)) {
|
||
y = Tk_Height(tkwin) - scalePtr->offset - bbox.descent;
|
||
}
|
||
XDrawString(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->textGC, rightEdge - bbox.rbearing,
|
||
y, valueString, length);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* DisplayHorizontalScale --
|
||
*
|
||
* This procedure redraws the contents of a horizontal scale
|
||
* window. It is invoked as a do-when-idle handler, so it only
|
||
* runs when there's nothing else for the application to do.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* Information appears on the screen.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayHorizontalScale(clientData)
|
||
ClientData clientData; /* Information about widget. */
|
||
{
|
||
register Scale *scalePtr = (Scale *) clientData;
|
||
register Tk_Window tkwin = scalePtr->tkwin;
|
||
int tickBottom, valueBottom, labelBottom, scaleBottom;
|
||
int totalPixels, x, y, width, height, shadowWidth, tickValue;
|
||
int relief, result;
|
||
Tk_3DBorder sliderBorder;
|
||
char string[20];
|
||
|
||
if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
|
||
goto done;
|
||
}
|
||
|
||
/*
|
||
* Invoke the scale's command if needed.
|
||
*/
|
||
|
||
if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) {
|
||
sprintf(string, " %d", scalePtr->value);
|
||
result = Tcl_VarEval(scalePtr->interp, scalePtr->command, string,
|
||
(char *) NULL);
|
||
if (result != TCL_OK) {
|
||
Tcl_AddErrorInfo(scalePtr->interp,
|
||
"\n (command executed by scale)");
|
||
Tk_BackgroundError(scalePtr->interp);
|
||
}
|
||
}
|
||
scalePtr->flags &= ~INVOKE_COMMAND;
|
||
|
||
/*
|
||
* Scanning from bottom to top across the window, the window
|
||
* will contain four rows: ticks, value, scale, and label.
|
||
* Compute the y-coordinate for each of the rows.
|
||
*/
|
||
|
||
totalPixels = scalePtr->tickPixels + scalePtr->valuePixels
|
||
+ 2*scalePtr->borderWidth + scalePtr->width
|
||
+ scalePtr->labelPixels;
|
||
tickBottom = (Tk_Height(tkwin) + totalPixels)/2 - 1;
|
||
valueBottom = tickBottom - scalePtr->tickPixels;
|
||
scaleBottom = valueBottom - scalePtr->valuePixels;
|
||
labelBottom = scaleBottom - 2*scalePtr->borderWidth - scalePtr->width;
|
||
|
||
/*
|
||
* Display the information from bottom to top across the window.
|
||
*/
|
||
|
||
if (scalePtr->flags & REDRAW_OTHER) {
|
||
XClearWindow(scalePtr->display, Tk_WindowId(tkwin));
|
||
|
||
/*
|
||
* Display the tick marks.
|
||
*/
|
||
|
||
if (scalePtr->tickPixels != 0) {
|
||
for (tickValue = scalePtr->fromValue; ;
|
||
tickValue += scalePtr->tickInterval) {
|
||
if (scalePtr->toValue > scalePtr->fromValue) {
|
||
if (tickValue > scalePtr->toValue) {
|
||
break;
|
||
}
|
||
} else {
|
||
if (tickValue < scalePtr->toValue) {
|
||
break;
|
||
}
|
||
}
|
||
DisplayHorizontalValue(scalePtr, tickValue, tickBottom);
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Display the value, if it is desired. If not redisplaying the
|
||
* entire window, clear the area of the value to get rid of the
|
||
* old value displayed there.
|
||
*/
|
||
|
||
if (scalePtr->showValue) {
|
||
if (!(scalePtr->flags & REDRAW_OTHER)) {
|
||
XClearArea(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->offset, scaleBottom + 1,
|
||
Tk_Width(tkwin) - 2*scalePtr->offset,
|
||
valueBottom - scaleBottom, False);
|
||
}
|
||
DisplayHorizontalValue(scalePtr, scalePtr->value, valueBottom);
|
||
}
|
||
|
||
/*
|
||
* Display the scale and the slider. If not redisplaying the
|
||
* entire window, must clear the trench area to erase the old
|
||
* slider, but don't need to redraw the border.
|
||
*/
|
||
|
||
y = scaleBottom - 2*scalePtr->borderWidth - scalePtr->width + 1;
|
||
if (scalePtr->flags & REDRAW_OTHER) {
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->bgBorder, scalePtr->offset, y,
|
||
Tk_Width(tkwin) - 2*scalePtr->offset,
|
||
scalePtr->width + 2*scalePtr->borderWidth,
|
||
scalePtr->borderWidth, TK_RELIEF_SUNKEN);
|
||
} else {
|
||
XClearArea(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->offset + scalePtr->borderWidth,
|
||
y + scalePtr->borderWidth,
|
||
Tk_Width(tkwin) - 2*scalePtr->offset - 2*scalePtr->borderWidth,
|
||
scalePtr->width, False);
|
||
}
|
||
if (scalePtr->flags & ACTIVE) {
|
||
sliderBorder = scalePtr->activeBorder;
|
||
} else {
|
||
sliderBorder = scalePtr->sliderBorder;
|
||
}
|
||
width = scalePtr->sliderLength/2;
|
||
height = scalePtr->width;
|
||
x = ValueToPixel(scalePtr, scalePtr->value) - width;
|
||
y += scalePtr->borderWidth;
|
||
shadowWidth = scalePtr->borderWidth/2;
|
||
if (shadowWidth == 0) {
|
||
shadowWidth = 1;
|
||
}
|
||
relief = (scalePtr->flags & BUTTON_PRESSED) ? TK_RELIEF_SUNKEN
|
||
: TK_RELIEF_RAISED;
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x, y, 2*width, height, shadowWidth, relief);
|
||
x += shadowWidth;
|
||
y += shadowWidth;
|
||
width -= shadowWidth;
|
||
height -= 2*shadowWidth;
|
||
Tk_Fill3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x, y, width, height, shadowWidth, relief);
|
||
Tk_Fill3DRectangle(scalePtr->display, Tk_WindowId(tkwin), sliderBorder,
|
||
x+width, y, width, height, shadowWidth, relief);
|
||
|
||
/*
|
||
* Draw the label to the top of the scale.
|
||
*/
|
||
|
||
if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelPixels != 0)) {
|
||
XDrawString(scalePtr->display, Tk_WindowId(scalePtr->tkwin),
|
||
scalePtr->textGC, scalePtr->offset + scalePtr->fontPtr->ascent/2,
|
||
labelBottom - scalePtr->fontPtr->descent,
|
||
scalePtr->label, scalePtr->labelLength);
|
||
}
|
||
|
||
/*
|
||
* Draw the window border.
|
||
*/
|
||
|
||
if ((scalePtr->flags & REDRAW_OTHER)
|
||
&& (scalePtr->relief != TK_RELIEF_FLAT)) {
|
||
Tk_Draw3DRectangle(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->bgBorder, 0, 0, Tk_Width(tkwin), Tk_Height(tkwin),
|
||
scalePtr->borderWidth, scalePtr->relief);
|
||
}
|
||
|
||
done:
|
||
scalePtr->flags &= ~REDRAW_ALL;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* DisplayHorizontalValue --
|
||
*
|
||
* This procedure is called to display values (scale readings)
|
||
* for horizontally-oriented scales.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* The numerical value corresponding to value is displayed with
|
||
* its bottom edge at "bottom", and at a horizontal position in
|
||
* the scale that corresponds to "value".
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
DisplayHorizontalValue(scalePtr, value, bottom)
|
||
register Scale *scalePtr; /* Information about widget in which to
|
||
* display value. */
|
||
int value; /* Y-coordinate of number to display,
|
||
* specified in application coords, not
|
||
* in pixels (we'll compute pixels). */
|
||
int bottom; /* Y-coordinate of bottom edge of text,
|
||
* specified in pixels. */
|
||
{
|
||
register Tk_Window tkwin = scalePtr->tkwin;
|
||
int x, y, dummy, length;
|
||
char valueString[30];
|
||
XCharStruct bbox;
|
||
|
||
x = ValueToPixel(scalePtr, value);
|
||
y = bottom - scalePtr->fontPtr->descent;
|
||
sprintf(valueString, "%d", value);
|
||
length = strlen(valueString);
|
||
XTextExtents(scalePtr->fontPtr, valueString, length,
|
||
&dummy, &dummy, &dummy, &bbox);
|
||
|
||
/*
|
||
* Adjust the x-coordinate if necessary to keep the text entirely
|
||
* inside the window.
|
||
*/
|
||
|
||
x -= (bbox.lbearing + bbox.rbearing)/2;
|
||
if ((x - bbox.lbearing) < scalePtr->offset) {
|
||
x = scalePtr->offset + bbox.lbearing;
|
||
}
|
||
if ((y + bbox.rbearing) > (Tk_Width(tkwin) - scalePtr->offset)) {
|
||
x = Tk_Width(tkwin) - scalePtr->offset - bbox.rbearing;
|
||
}
|
||
XDrawString(scalePtr->display, Tk_WindowId(tkwin),
|
||
scalePtr->textGC, x, y, valueString, length);
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PixelToValue --
|
||
*
|
||
* Given a pixel within a scale window, return the scale
|
||
* reading corresponding to that pixel.
|
||
*
|
||
* Results:
|
||
* An integer scale reading.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
PixelToValue(scalePtr, x, y)
|
||
register Scale *scalePtr; /* Information about widget. */
|
||
int x, y; /* Coordinates of point within
|
||
* window. */
|
||
{
|
||
int value, pixelRange;
|
||
double dtmp;
|
||
|
||
if (scalePtr->vertical) {
|
||
pixelRange = Tk_Height(scalePtr->tkwin) - scalePtr->sliderLength
|
||
- 2*scalePtr->offset - 2*scalePtr->borderWidth;
|
||
value = y;
|
||
} else {
|
||
pixelRange = Tk_Width(scalePtr->tkwin) - scalePtr->sliderLength
|
||
- 2*scalePtr->offset - 2*scalePtr->borderWidth;
|
||
value = x;
|
||
}
|
||
|
||
if (pixelRange <= 0) {
|
||
/*
|
||
* Not enough room for the slider to actually slide: just return
|
||
* the scale's current value.
|
||
*/
|
||
|
||
return scalePtr->value;
|
||
}
|
||
value -= scalePtr->sliderLength/2 + scalePtr->offset
|
||
+ scalePtr->borderWidth;
|
||
if (value < 0) {
|
||
value = 0;
|
||
}
|
||
if (value > pixelRange) {
|
||
value = pixelRange;
|
||
}
|
||
|
||
/*
|
||
* The mathematics below is a bit tricky. To avoid integer overflow
|
||
* during the multiplication and division steps, do the arithmetic
|
||
* using doubles.
|
||
*/
|
||
|
||
dtmp = value * ((double) (scalePtr->toValue - scalePtr->fromValue));
|
||
dtmp = scalePtr->fromValue + dtmp/pixelRange;
|
||
if (dtmp < 0) {
|
||
value = dtmp - 0.5;
|
||
} else {
|
||
value = dtmp + 0.5;
|
||
}
|
||
return value;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* ValueToPixel --
|
||
*
|
||
* Given a reading of the scale, return the x-coordinate or
|
||
* y-coordinate corresponding to that reading, depending on
|
||
* whether the scale is vertical or horizontal, respectively.
|
||
*
|
||
* Results:
|
||
* An integer value giving the pixel location corresponding
|
||
* to reading. The value is restricted to lie within the
|
||
* defined range for the scale.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
ValueToPixel(scalePtr, value)
|
||
register Scale *scalePtr; /* Information about widget. */
|
||
int value; /* Reading of the widget. */
|
||
{
|
||
int y, pixelRange, valueRange;
|
||
double dtmp;
|
||
|
||
valueRange = scalePtr->toValue - scalePtr->fromValue;
|
||
pixelRange = (scalePtr->vertical ? Tk_Height(scalePtr->tkwin)
|
||
: Tk_Width(scalePtr->tkwin)) - scalePtr->sliderLength
|
||
- 2*scalePtr->offset - 2*scalePtr->borderWidth;
|
||
if (valueRange == 0) {
|
||
y = 0;
|
||
} else {
|
||
/*
|
||
* Do arithmetic with doubles to avoid integer overflow if the
|
||
* scale has a large range.
|
||
*/
|
||
|
||
dtmp = (value - scalePtr->fromValue);
|
||
dtmp = (dtmp * pixelRange)/valueRange;
|
||
y = dtmp + 0.5;
|
||
if (y < 0) {
|
||
y = 0;
|
||
} else if (y > pixelRange) {
|
||
y = pixelRange;
|
||
}
|
||
}
|
||
y += scalePtr->sliderLength/2 + scalePtr->offset + scalePtr->borderWidth;
|
||
return y;
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleEventProc --
|
||
*
|
||
* This procedure is invoked by the Tk dispatcher for various
|
||
* events on scales.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* When the window gets deleted, internal structures get
|
||
* cleaned up. When it gets exposed, it is redisplayed.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ScaleEventProc(clientData, eventPtr)
|
||
ClientData clientData; /* Information about window. */
|
||
XEvent *eventPtr; /* Information about event. */
|
||
{
|
||
Scale *scalePtr = (Scale *) clientData;
|
||
|
||
if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
|
||
EventuallyRedrawScale(scalePtr, REDRAW_ALL);
|
||
} else if (eventPtr->type == DestroyNotify) {
|
||
Tcl_DeleteCommand(scalePtr->interp, Tk_PathName(scalePtr->tkwin));
|
||
scalePtr->tkwin = NULL;
|
||
if (scalePtr->flags & REDRAW_ALL) {
|
||
if (scalePtr->vertical) {
|
||
Tk_CancelIdleCall(DisplayVerticalScale, (ClientData) scalePtr);
|
||
} else {
|
||
Tk_CancelIdleCall(DisplayHorizontalScale,
|
||
(ClientData) scalePtr);
|
||
}
|
||
}
|
||
Tk_EventuallyFree((ClientData) scalePtr, DestroyScale);
|
||
} else if (eventPtr->type == ConfigureNotify) {
|
||
ComputeScaleGeometry(scalePtr);
|
||
}
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* ScaleMouseProc --
|
||
*
|
||
* This procedure is called back by Tk in response to
|
||
* mouse events such as window entry, window exit, mouse
|
||
* motion, and button presses.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* This procedure implements the "feel" of the scale by
|
||
* issuing commands in response to button presses and mouse
|
||
* motion.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
ScaleMouseProc(clientData, eventPtr)
|
||
ClientData clientData; /* Information about window. */
|
||
register XEvent *eventPtr; /* Information about event. */
|
||
{
|
||
register Scale *scalePtr = (Scale *) clientData;
|
||
|
||
if (scalePtr->state != tkNormalUid) {
|
||
return;
|
||
}
|
||
|
||
Tk_Preserve((ClientData) scalePtr);
|
||
if (eventPtr->type == EnterNotify) {
|
||
scalePtr->flags |= ACTIVE;
|
||
EventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
|
||
} else if (eventPtr->type == LeaveNotify) {
|
||
scalePtr->flags &= ~ACTIVE;
|
||
EventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
|
||
} else if ((eventPtr->type == MotionNotify)
|
||
&& (scalePtr->flags & BUTTON_PRESSED)) {
|
||
SetScaleValue(scalePtr, PixelToValue(scalePtr,
|
||
eventPtr->xmotion.x, eventPtr->xmotion.y));
|
||
} else if ((eventPtr->type == ButtonPress)
|
||
&& (eventPtr->xbutton.button == Button1)
|
||
&& (eventPtr->xbutton.state == 0)) {
|
||
scalePtr->flags |= BUTTON_PRESSED;
|
||
SetScaleValue(scalePtr, PixelToValue(scalePtr,
|
||
eventPtr->xbutton.x, eventPtr->xbutton.y));
|
||
EventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
|
||
} else if ((eventPtr->type == ButtonRelease)
|
||
&& (eventPtr->xbutton.button == Button1)
|
||
&& (scalePtr->flags & BUTTON_PRESSED)) {
|
||
scalePtr->flags &= ~BUTTON_PRESSED;
|
||
EventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
|
||
}
|
||
Tk_Release((ClientData) scalePtr);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* SetScaleValue --
|
||
*
|
||
* This procedure changes the value of a scale and invokes
|
||
* a Tcl command to reflect the current position of a scale
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* A Tcl command is invoked, and an additional error-processing
|
||
* command may also be invoked. The scale's slider is redrawn.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
SetScaleValue(scalePtr, value)
|
||
register Scale *scalePtr; /* Info about widget. */
|
||
int value; /* New value for scale. Gets
|
||
* adjusted if it's off the scale. */
|
||
{
|
||
if ((value < scalePtr->fromValue)
|
||
^ (scalePtr->toValue < scalePtr->fromValue)) {
|
||
value = scalePtr->fromValue;
|
||
}
|
||
if ((value > scalePtr->toValue)
|
||
^ (scalePtr->toValue < scalePtr->fromValue)) {
|
||
value = scalePtr->toValue;
|
||
}
|
||
if (value == scalePtr->value) {
|
||
return;
|
||
}
|
||
scalePtr->value = value;
|
||
scalePtr->flags |= INVOKE_COMMAND;
|
||
EventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
|
||
}
|
||
|
||
/*
|
||
*--------------------------------------------------------------
|
||
*
|
||
* EventuallyRedrawScale --
|
||
*
|
||
* Arrange for part or all of a scale widget to redrawn at
|
||
* the next convenient time in the future.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* If "what" is REDRAW_SLIDER then just the slider and the
|
||
* value readout will be redrawn; if "what" is REDRAW_ALL
|
||
* then the entire widget will be redrawn.
|
||
*
|
||
*--------------------------------------------------------------
|
||
*/
|
||
|
||
static void
|
||
EventuallyRedrawScale(scalePtr, what)
|
||
register Scale *scalePtr; /* Information about widget. */
|
||
int what; /* What to redraw: REDRAW_SLIDER
|
||
* or REDRAW_ALL. */
|
||
{
|
||
if ((what == 0) || (scalePtr->tkwin == NULL)
|
||
|| !Tk_IsMapped(scalePtr->tkwin)) {
|
||
return;
|
||
}
|
||
if ((scalePtr->flags & REDRAW_ALL) == 0) {
|
||
if (scalePtr->vertical) {
|
||
Tk_DoWhenIdle(DisplayVerticalScale, (ClientData) scalePtr);
|
||
} else {
|
||
Tk_DoWhenIdle(DisplayHorizontalScale, (ClientData) scalePtr);
|
||
}
|
||
}
|
||
scalePtr->flags |= what;
|
||
}
|