source: trunk/kitgen/8.x/blt/generic/bltGraph.h@ 176

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[175]1/*
2 * bltGraph.h --
3 *
4 * Copyright 1991-1998 Lucent Technologies, Inc.
5 *
6 * Permission to use, copy, modify, and distribute this software and
7 * its documentation for any purpose and without fee is hereby
8 * granted, provided that the above copyright notice appear in all
9 * copies and that both that the copyright notice and warranty
10 * disclaimer appear in supporting documentation, and that the names
11 * of Lucent Technologies any of their entities not be used in
12 * advertising or publicity pertaining to distribution of the software
13 * without specific, written prior permission.
14 *
15 * Lucent Technologies disclaims all warranties with regard to this
16 * software, including all implied warranties of merchantability and
17 * fitness. In no event shall Lucent Technologies be liable for any
18 * special, indirect or consequential damages or any damages
19 * whatsoever resulting from loss of use, data or profits, whether in
20 * an action of contract, negligence or other tortuous action, arising
21 * out of or in connection with the use or performance of this
22 * software.
23 */
24
25#ifndef _BLT_GRAPH_H
26#define _BLT_GRAPH_H
27
28#include "bltInt.h"
29#include "bltHash.h"
30#include "bltBind.h"
31#include "bltChain.h"
32#include "bltPs.h"
33#include "bltTile.h"
34
35typedef struct GraphStruct Graph;
36typedef struct ElementStruct Element;
37typedef struct LegendStruct Legend;
38
39#include "bltGrAxis.h"
40#include "bltGrLegd.h"
41
42#define MARKER_UNDER 1 /* Draw markers designated to lie underneath
43 * elements, grids, legend, etc. */
44#define MARKER_ABOVE 0 /* Draw markers designated to rest above
45 * elements, grids, legend, etc. */
46
47#define PADX 2 /* Padding between labels/titles */
48#define PADY 2 /* Padding between labels */
49
50#define MINIMUM_MARGIN 20 /* Minimum margin size */
51
52
53#define BOUND(x, lo, hi) \
54 (((x) > (hi)) ? (hi) : ((x) < (lo)) ? (lo) : (x))
55
56/*
57 * -------------------------------------------------------------------
58 *
59 * Graph component structure definitions
60 *
61 * -------------------------------------------------------------------
62 */
63#define PointInGraph(g,x,y) \
64 (((x) <= (g)->right) && ((x) >= (g)->left) && \
65 ((y) <= (g)->bottom) && ((y) >= (g)->top))
66
67/*
68 * -------------------------------------------------------------------
69 *
70 * ClassType --
71 *
72 * Enumerates the different types of graph elements this program
73 * produces. An element can be either a line or a bar.
74 *
75 * -------------------------------------------------------------------
76 */
77typedef enum {
78 CLASS_UNKNOWN,
79 CLASS_LINE_ELEMENT,
80 CLASS_STRIP_ELEMENT,
81 CLASS_BAR_ELEMENT,
82 CLASS_BITMAP_MARKER,
83 CLASS_IMAGE_MARKER,
84 CLASS_LINE_MARKER,
85 CLASS_POLYGON_MARKER,
86 CLASS_TEXT_MARKER,
87 CLASS_WINDOW_MARKER
88
89} ClassType;
90
91/*
92 * Mask values used to selectively enable GRAPH or BARCHART entries in
93 * the various configuration specs.
94 */
95#define GRAPH (TK_CONFIG_USER_BIT << 1)
96#define STRIPCHART (TK_CONFIG_USER_BIT << 2)
97#define BARCHART (TK_CONFIG_USER_BIT << 3)
98#define LINE_GRAPHS (GRAPH | STRIPCHART)
99#define ALL_GRAPHS (GRAPH | BARCHART | STRIPCHART)
100
101#define PEN_DELETE_PENDING (1<<0)
102#define ACTIVE_PEN (TK_CONFIG_USER_BIT << 6)
103#define NORMAL_PEN (TK_CONFIG_USER_BIT << 7)
104#define ALL_PENS (NORMAL_PEN | ACTIVE_PEN)
105
106/*
107 * -------------------------------------------------------------------
108 *
109 * FreqInfo --
110 *
111 * -------------------------------------------------------------------
112 */
113typedef struct {
114 int freq; /* Number of occurrences of x-coordinate */
115 Axis2D axes; /* Indicates which x and y axis are mapped to
116 * the x-value */
117 double sum; /* Sum of the ordinates of each duplicate
118 * abscissa */
119 int count;
120 double lastY;
121
122} FreqInfo;
123
124/*
125 * -------------------------------------------------------------------
126 *
127 * FreqKey --
128 *
129 *
130 * -------------------------------------------------------------------
131 */
132typedef struct {
133 double value; /* Duplicated abscissa */
134 Axis2D axes; /* Axis mapping of element */
135} FreqKey;
136
137/*
138 * BarModes --
139 *
140 * Bar elements are displayed according to their x-y coordinates.
141 * If two bars have the same abscissa (x-coordinate), the bar
142 * segments will be drawn according to one of the following
143 * modes:
144 */
145
146typedef enum BarModes {
147 MODE_INFRONT, /* Each successive segment is drawn in
148 * front of the previous. */
149 MODE_STACKED, /* Each successive segment is drawn
150 * stacked above the previous. */
151 MODE_ALIGNED, /* Each successive segment is drawn
152 * aligned to the previous from
153 * right-to-left. */
154 MODE_OVERLAP /* Like "aligned", each successive segment
155 * is drawn from right-to-left. In addition
156 * the segments will overlap each other
157 * by a small amount */
158} BarMode;
159
160typedef struct PenStruct Pen;
161typedef struct MarkerStruct Marker;
162
163typedef Pen *(PenCreateProc) _ANSI_ARGS_((void));
164typedef int (PenConfigureProc) _ANSI_ARGS_((Graph *graphPtr, Pen *penPtr));
165typedef void (PenDestroyProc) _ANSI_ARGS_((Graph *graphPtr, Pen *penPtr));
166
167struct PenStruct {
168 char *name; /* Pen style identifier. If NULL pen
169 * was statically allocated. */
170 Blt_Uid classUid; /* Type of pen */
171 char *typeId; /* String token identifying the type of pen */
172 unsigned int flags; /* Indicates if the pen element is active or
173 * normal */
174 int refCount; /* Reference count for elements using
175 * this pen. */
176 Blt_HashEntry *hashPtr;
177
178 Tk_ConfigSpec *configSpecs; /* Configuration specifications */
179
180 PenConfigureProc *configProc;
181 PenDestroyProc *destroyProc;
182
183};
184
185typedef enum {
186 PS_MONO_BACKGROUND,
187 PS_MONO_FOREGROUND
188} MonoAttribute;
189
190/*
191 * PostScript --
192 *
193 * Structure contains information specific to the outputting of
194 * PostScript commands to print the graph.
195 *
196 */
197typedef struct {
198 /* User configurable fields */
199
200 int decorations; /* If non-zero, print graph with
201 * color background and 3D borders */
202
203 int reqWidth, reqHeight; /* If greater than zero, represents the
204 * requested dimensions of the printed graph */
205 int reqPaperWidth;
206 int reqPaperHeight; /* Requested dimensions for the PostScript
207 * page. Can constrain the size of the graph
208 * if the graph (plus padding) is larger than
209 * the size of the page. */
210 Blt_Pad padX, padY; /* Requested padding on the exterior of the
211 * graph. This forms the bounding box for
212 * the page. */
213 PsColorMode colorMode; /* Selects the color mode for PostScript page
214 * (0=monochrome, 1=greyscale, 2=color) */
215 char *colorVarName; /* If non-NULL, is the name of a Tcl array
216 * variable containing X to PostScript color
217 * translations */
218 char *fontVarName; /* If non-NULL, is the name of a Tcl array
219 * variable containing X to PostScript font
220 * translations */
221 int landscape; /* If non-zero, orient the page 90 degrees */
222 int center; /* If non-zero, center the graph on the page */
223 int maxpect; /* If non-zero, indicates to scale the graph
224 * so that it fills the page (maintaining the
225 * aspect ratio of the graph) */
226 int addPreview; /* If non-zero, generate a preview image and
227 * add it to the PostScript output */
228 int footer; /* If non-zero, a footer with the title, date
229 * and user will be added to the PostScript
230 * output outside of the bounding box. */
231 int previewFormat; /* Format of EPS preview:
232 * PS_PREVIEW_WMF, PS_PREVIEW_EPSI, or
233 * PS_PREVIEW_TIFF. */
234
235 /* Computed fields */
236
237 int left, bottom; /* Bounding box of PostScript plot. */
238 int right, top;
239
240 double pageScale; /* Scale of page. Set if "-maxpect" option
241 * is set, otherwise 1.0. */
242} PostScript;
243
244/*
245 * -------------------------------------------------------------------
246 *
247 * Grid
248 *
249 * Contains attributes of describing how to draw grids (at major
250 * ticks) in the graph. Grids may be mapped to either/both x and
251 * y axis.
252 *
253 * -------------------------------------------------------------------
254 */
255typedef struct {
256 GC gc; /* Graphics context for the grid. */
257 Axis2D axes;
258 int hidden; /* If non-zero, grid isn't displayed. */
259 int minorGrid; /* If non-zero, draw grid line for minor
260 * axis ticks too */
261 Blt_Dashes dashes; /* Dashstyle of the grid. This represents
262 * an array of alternatingly drawn pixel
263 * values. */
264 int lineWidth; /* Width of the grid lines */
265 XColor *colorPtr; /* Color of the grid lines */
266
267 struct GridSegments {
268 Segment2D *segments; /* Array of line segments representing the
269 * x or y grid lines */
270 int nSegments; /* # of axis segments. */
271 } x, y;
272
273} Grid;
274
275/*
276 * -------------------------------------------------------------------
277 *
278 * Crosshairs
279 *
280 * Contains the line segments positions and graphics context used
281 * to simulate crosshairs (by XOR-ing) on the graph.
282 *
283 * -------------------------------------------------------------------
284 */
285typedef struct CrosshairsStruct Crosshairs;
286
287typedef struct {
288 short int width, height; /* Extents of the margin */
289
290 short int axesOffset;
291 short int axesTitleLength; /* Width of the widest title to be shown.
292 * Multiple titles are displayed in
293 * another margin. This is the minimum
294 * space requirement. */
295 unsigned int nAxes; /* Number of axes to be displayed */
296 Blt_Chain *axes; /* Extra axes associated with this margin */
297
298 char *varName; /* If non-NULL, name of variable to be
299 * updated when the margin size changes */
300
301 int reqSize; /* Requested size of margin */
302 int site; /* Indicates where margin is located:
303 * left/right/top/bottom. */
304} Margin;
305
306#define MARGIN_NONE -1
307#define MARGIN_BOTTOM 0
308#define MARGIN_LEFT 1
309#define MARGIN_TOP 2
310#define MARGIN_RIGHT 3
311
312#define rightMargin margins[MARGIN_RIGHT]
313#define leftMargin margins[MARGIN_LEFT]
314#define topMargin margins[MARGIN_TOP]
315#define bottomMargin margins[MARGIN_BOTTOM]
316
317/*
318 * -------------------------------------------------------------------
319 *
320 * Graph --
321 *
322 * Top level structure containing everything pertaining to
323 * the graph.
324 *
325 * -------------------------------------------------------------------
326 */
327struct GraphStruct {
328 unsigned int flags; /* Flags; see below for definitions. */
329 Tcl_Interp *interp; /* Interpreter associated with graph */
330 Tk_Window tkwin; /* Window that embodies the graph. NULL
331 * means that the window has been
332 * destroyed but the data structures
333 * haven't yet been cleaned up. */
334 Display *display; /* Display containing widget; needed,
335 * among other things, to release
336 * resources after tkwin has already gone
337 * away. */
338 Tcl_Command cmdToken; /* Token for graph's widget command. */
339
340 char *data; /* This value isn't used in C code.
341 * It may be used in Tcl bindings to
342 * associate extra data. */
343
344 Tk_Cursor cursor;
345
346 int inset; /* Sum of focus highlight and 3-D
347 * border. Indicates how far to
348 * offset the graph from outside
349 * edge of the window. */
350
351 int borderWidth; /* Width of the exterior border */
352 int relief; /* Relief of the exterior border */
353 Tk_3DBorder border; /* 3-D border used to delineate the plot
354 * surface and outer edge of window */
355
356 int highlightWidth; /* Width in pixels of highlight to draw
357 * around widget when it has the focus.
358 * <= 0 means don't draw a highlight. */
359 XColor *highlightBgColor; /* Color for drawing traversal highlight
360 * area when highlight is off. */
361 XColor *highlightColor; /* Color for drawing traversal highlight. */
362
363 char *title;
364 short int titleX, titleY;
365 TextStyle titleTextStyle; /* Graph title */
366
367 char *takeFocus;
368
369 int reqWidth, reqHeight; /* Requested size of graph window */
370 int width, height; /* Size of graph window or PostScript
371 * page */
372
373 Blt_HashTable penTable; /* Table of pens */
374
375 struct Component {
376 Blt_HashTable table; /* Hash table of ids. */
377 Blt_Chain *displayList; /* Display list. */
378 Blt_HashTable tagTable; /* Table of bind tags. */
379 } elements, markers, axes;
380
381 Blt_Uid classUid; /* Default element type */
382
383 Blt_BindTable bindTable;
384 int nextMarkerId; /* Tracks next marker identifier available */
385
386 Blt_Chain *axisChain[4]; /* Chain of axes for each of the
387 * margins. They're separate from the
388 * margin structures to make it easier
389 * to invert the X-Y axes by simply
390 * switching chain pointers.
391 */
392 Margin margins[4];
393
394 PostScript *postscript; /* PostScript options: see bltGrPS.c */
395 Legend *legend; /* Legend information: see bltGrLegd.c */
396 Crosshairs *crosshairs; /* Crosshairs information: see bltGrHairs.c */
397 Grid *gridPtr; /* Grid attribute information */
398
399 int halo; /* Maximum distance allowed between points
400 * when searching for a point */
401 int inverted; /* If non-zero, indicates the x and y axis
402 * positions should be inverted. */
403 Blt_Tile tile;
404 GC drawGC; /* Used for drawing on the margins. This
405 * includes the axis lines */
406 GC fillGC; /* Used to fill the background of the
407 * margins. The fill is governed by
408 * the background color or the tiled
409 * pixmap. */
410 int plotBorderWidth; /* Width of interior 3-D border. */
411 int plotRelief; /* 3-d effect: TK_RELIEF_RAISED etc. */
412 XColor *plotBg; /* Color of plotting surface */
413
414 GC plotFillGC; /* Used to fill the plotting area with a
415 * solid background color. The fill color
416 * is stored in "plotBg". */
417
418 /* If non-zero, force plot to conform to aspect ratio W/H */
419 double aspect;
420
421 short int left, right; /* Coordinates of plot bbox */
422 short int top, bottom;
423
424 Blt_Pad padX; /* Vertical padding for plotarea */
425 int vRange, vOffset; /* Vertical axis range and offset from the
426 * left side of the graph window. Used to
427 * transform coordinates to vertical
428 * axes. */
429 Blt_Pad padY; /* Horizontal padding for plotarea */
430 int hRange, hOffset; /* Horizontal axis range and offset from
431 * the top of the graph window. Used to
432 * transform horizontal axes */
433 double vScale, hScale;
434
435 int doubleBuffer; /* If non-zero, draw the graph into a pixmap
436 * first to reduce flashing. */
437 int backingStore; /* If non-zero, cache elements by drawing
438 * them into a pixmap */
439 Pixmap backPixmap; /* Pixmap used to cache elements
440 * displayed. If *backingStore* is
441 * non-zero, each element is drawn
442 * into this pixmap before it is
443 * copied onto the screen. The pixmap
444 * then acts as a cache (only the
445 * pixmap is redisplayed if the none
446 * of elements have changed). This is
447 * done so that markers can be redrawn
448 * quickly over elements without
449 * redrawing each element. */
450 int backWidth, backHeight; /* Size of element backing store pixmap. */
451
452 /*
453 * barchart specific information
454 */
455 double baseline; /* Baseline from bar chart. */
456 double barWidth; /* Default width of each bar in graph units.
457 * The default width is 1.0 units. */
458 BarMode mode; /* Mode describing how to display bars
459 * with the same x-coordinates. Mode can
460 * be "stack", "align", or "normal" */
461 FreqInfo *freqArr; /* Contains information about duplicate
462 * x-values in bar elements (malloc-ed).
463 * This information can also be accessed
464 * by the frequency hash table */
465 Blt_HashTable freqTable; /* */
466 int nStacks; /* Number of entries in frequency array.
467 * If zero, indicates nothing special needs
468 * to be done for "stack" or "align" modes */
469 char *dataCmd; /* New data callback? */
470
471};
472
473/*
474 * Bit flags definitions:
475 *
476 * All kinds of state information kept here. All these
477 * things happen when the window is available to draw into
478 * (DisplayGraph). Need the window width and height before
479 * we can calculate graph layout (i.e. the screen coordinates
480 * of the axes, elements, titles, etc). But we want to do this
481 * only when we have to, not every time the graph is redrawn.
482 *
483 * Same goes for maintaining a pixmap to double buffer graph
484 * elements. Need to mark when the pixmap needs to updated.
485 *
486 *
487 * MAP_ITEM Indicates that the element/marker/axis
488 * configuration has changed such that
489 * its layout of the item (i.e. its
490 * position in the graph window) needs
491 * to be recalculated.
492 *
493 * MAP_ALL Indicates that the layout of the axes and
494 * all elements and markers and the graph need
495 * to be recalculated. Otherwise, the layout
496 * of only those markers and elements that
497 * have changed will be reset.
498 *
499 * GET_AXIS_GEOMETRY Indicates that the size of the axes needs
500 * to be recalculated.
501 *
502 * RESET_AXES Flag to call to Blt_ResetAxes routine.
503 * This routine recalculates the scale offset
504 * (used for mapping coordinates) of each axis.
505 * If an axis limit has changed, then it sets
506 * flags to re-layout and redraw the entire
507 * graph. This needs to happend before the axis
508 * can compute transformations between graph and
509 * screen coordinates.
510 *
511 * LAYOUT_NEEDED
512 *
513 * REDRAW_BACKING_STORE If set, redraw all elements into the pixmap
514 * used for buffering elements.
515 *
516 * REDRAW_PENDING Non-zero means a DoWhenIdle handler has
517 * already been queued to redraw this window.
518 *
519 * DRAW_LEGEND Non-zero means redraw the legend. If this is
520 * the only DRAW_* flag, the legend display
521 * routine is called instead of the graph
522 * display routine.
523 *
524 * DRAW_MARGINS Indicates that the margins bordering
525 * the plotting area need to be redrawn.
526 * The possible reasons are:
527 *
528 * 1) an axis configuration changed
529 * 2) an axis limit changed
530 * 3) titles have changed
531 * 4) window was resized.
532 *
533 * GRAPH_FOCUS
534 */
535
536#define MAP_ITEM (1<<0) /* 0x0001 */
537#define MAP_ALL (1<<1) /* 0x0002 */
538#define GET_AXIS_GEOMETRY (1<<2) /* 0x0004 */
539#define RESET_AXES (1<<3) /* 0x0008 */
540#define LAYOUT_NEEDED (1<<4) /* 0x0010 */
541
542#define REDRAW_PENDING (1<<8) /* 0x0100 */
543#define DRAW_LEGEND (1<<9) /* 0x0200 */
544#define DRAW_MARGINS (1<<10)/* 0x0400 */
545#define REDRAW_BACKING_STORE (1<<11)/* 0x0800 */
546
547#define GRAPH_FOCUS (1<<12)/* 0x1000 */
548#define DATA_CHANGED (1<<13)/* 0x2000 */
549
550#define MAP_WORLD (MAP_ALL|RESET_AXES|GET_AXIS_GEOMETRY)
551#define REDRAW_WORLD (DRAW_MARGINS | DRAW_LEGEND)
552#define RESET_WORLD (REDRAW_WORLD | MAP_WORLD)
553
554/*
555 * ---------------------- Forward declarations ------------------------
556 */
557
558extern int Blt_CreatePostScript _ANSI_ARGS_((Graph *graphPtr));
559extern int Blt_CreateCrosshairs _ANSI_ARGS_((Graph *graphPtr));
560extern int Blt_CreateGrid _ANSI_ARGS_((Graph *graphPtr));
561extern double Blt_InvHMap _ANSI_ARGS_((Graph *graphPtr, Axis *axisPtr,
562 double x));
563extern double Blt_InvVMap _ANSI_ARGS_((Graph *graphPtr, Axis *axisPtr,
564 double x));
565extern double Blt_HMap _ANSI_ARGS_((Graph *graphPtr, Axis *axisPtr, double x));
566extern double Blt_VMap _ANSI_ARGS_((Graph *graphPtr, Axis *axisPtr, double y));
567extern Point2D Blt_InvMap2D _ANSI_ARGS_((Graph *graphPtr, double x,
568 double y, Axis2D *pairPtr));
569extern Point2D Blt_Map2D _ANSI_ARGS_((Graph *graphPtr, double x,
570 double y, Axis2D *pairPtr));
571extern Graph *Blt_GetGraphFromWindowData _ANSI_ARGS_((Tk_Window tkwin));
572extern void Blt_AdjustAxisPointers _ANSI_ARGS_((Graph *graphPtr));
573extern int Blt_LineRectClip _ANSI_ARGS_((Extents2D *extsPtr, Point2D *p,
574 Point2D *q));
575extern int Blt_PolyRectClip _ANSI_ARGS_((Extents2D *extsPtr, Point2D *inputPts,
576 int nInputPts, Point2D *outputPts));
577
578extern void Blt_ComputeStacks _ANSI_ARGS_((Graph *graphPtr));
579extern void Blt_ConfigureCrosshairs _ANSI_ARGS_((Graph *graphPtr));
580extern void Blt_DestroyAxes _ANSI_ARGS_((Graph *graphPtr));
581extern void Blt_DestroyCrosshairs _ANSI_ARGS_((Graph *graphPtr));
582extern void Blt_DestroyGrid _ANSI_ARGS_((Graph *graphPtr));
583extern void Blt_DestroyElements _ANSI_ARGS_((Graph *graphPtr));
584extern void Blt_DestroyMarkers _ANSI_ARGS_((Graph *graphPtr));
585extern void Blt_DestroyPostScript _ANSI_ARGS_((Graph *graphPtr));
586extern void Blt_DrawAxes _ANSI_ARGS_((Graph *graphPtr, Drawable drawable));
587extern void Blt_DrawAxisLimits _ANSI_ARGS_((Graph *graphPtr,
588 Drawable drawable));
589extern void Blt_DrawElements _ANSI_ARGS_((Graph *graphPtr, Drawable drawable));
590extern void Blt_DrawActiveElements _ANSI_ARGS_((Graph *graphPtr,
591 Drawable drawable));
592extern void Blt_DrawGraph _ANSI_ARGS_((Graph *graphPtr, Drawable drawable,
593 int backingStore));
594extern void Blt_DrawGrid _ANSI_ARGS_((Graph *graphPtr, Drawable drawable));
595extern void Blt_DrawMarkers _ANSI_ARGS_((Graph *graphPtr, Drawable drawable,
596 int under));
597extern void Blt_Draw2DSegments _ANSI_ARGS_((Display *display,
598 Drawable drawable, GC gc, Segment2D *segments, int nSegments));
599extern int Blt_GetCoordinate _ANSI_ARGS_((Tcl_Interp *interp,
600 char *expr, double *valuePtr));
601extern void Blt_InitFreqTable _ANSI_ARGS_((Graph *graphPtr));
602extern void Blt_LayoutGraph _ANSI_ARGS_((Graph *graphPtr));
603extern void Blt_LayoutMargins _ANSI_ARGS_((Graph *graphPtr));
604extern void Blt_EventuallyRedrawGraph _ANSI_ARGS_((Graph *graphPtr));
605extern void Blt_ResetAxes _ANSI_ARGS_((Graph *graphPtr));
606extern void Blt_ResetStacks _ANSI_ARGS_((Graph *graphPtr));
607extern void Blt_GraphExtents _ANSI_ARGS_((Graph *graphPtr, Extents2D *extsPtr));
608extern void Blt_DisableCrosshairs _ANSI_ARGS_((Graph *graphPtr));
609extern void Blt_EnableCrosshairs _ANSI_ARGS_((Graph *graphPtr));
610extern void Blt_MapAxes _ANSI_ARGS_((Graph *graphPtr));
611extern void Blt_MapElements _ANSI_ARGS_((Graph *graphPtr));
612extern void Blt_MapGraph _ANSI_ARGS_((Graph *graphPtr));
613extern void Blt_MapMarkers _ANSI_ARGS_((Graph *graphPtr));
614extern void Blt_MapGrid _ANSI_ARGS_((Graph *graphPtr));
615extern void Blt_UpdateCrosshairs _ANSI_ARGS_((Graph *graphPtr));
616extern void Blt_DestroyPens _ANSI_ARGS_((Graph *graphPtr));
617extern int Blt_GetPen _ANSI_ARGS_((Graph *graphPtr, char *name,
618 Blt_Uid classUid, Pen **penPtrPtr));
619extern Pen *Blt_BarPen _ANSI_ARGS_((char *penName));
620extern Pen *Blt_LinePen _ANSI_ARGS_((char *penName));
621extern Pen *Blt_CreatePen _ANSI_ARGS_((Graph *graphPtr, char *penName,
622 Blt_Uid classUid, int nOpts, char **options));
623extern int Blt_InitLinePens _ANSI_ARGS_((Graph *graphPtr));
624extern int Blt_InitBarPens _ANSI_ARGS_((Graph *graphPtr));
625extern void Blt_FreePen _ANSI_ARGS_((Graph *graphPtr, Pen *penPtr));
626
627extern int Blt_VirtualAxisOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
628 int argc, char **argv));
629extern int Blt_AxisOp _ANSI_ARGS_((Graph *graphPtr, int margin, int argc,
630 char **argv));
631extern int Blt_ElementOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
632 int argc, char **argv, Blt_Uid classUid));
633extern int Blt_GridOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
634 int argc, char **argv));
635extern int Blt_CrosshairsOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
636 int argc, char **argv));
637extern int Blt_MarkerOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
638 int argc, char **argv));
639extern int Blt_PenOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
640 int argc, char **argv));
641extern int Blt_PointInPolygon _ANSI_ARGS_((Point2D *samplePtr,
642 Point2D *screenPts, int nScreenPts));
643extern int Blt_RegionInPolygon _ANSI_ARGS_((Extents2D *extsPtr, Point2D *points,
644 int nPoints, int enclosed));
645extern int Blt_PointInSegments _ANSI_ARGS_((Point2D *samplePtr,
646 Segment2D *segments, int nSegments, double halo));
647extern int Blt_PostScriptOp _ANSI_ARGS_((Graph *graphPtr, Tcl_Interp *interp,
648 int argc, char **argv));
649extern int Blt_GraphUpdateNeeded _ANSI_ARGS_((Graph *graphPtr));
650extern int Blt_DefaultAxes _ANSI_ARGS_((Graph *graphPtr));
651extern Axis *Blt_GetFirstAxis _ANSI_ARGS_((Blt_Chain *chainPtr));
652extern void Blt_UpdateAxisBackgrounds _ANSI_ARGS_((Graph *graphPtr));
653extern void Blt_GetAxisSegments _ANSI_ARGS_((Graph *graphPtr, Axis *axisPtr,
654 Segment2D **segPtrPtr, int *nSegmentsPtr));
655extern Marker *Blt_NearestMarker _ANSI_ARGS_((Graph *graphPtr, int x, int y,
656 int under));
657extern Axis *Blt_NearestAxis _ANSI_ARGS_((Graph *graphPtr, int x, int y));
658
659
660typedef ClientData (MakeTagProc) _ANSI_ARGS_((Graph *graphPtr, char *tagName));
661extern MakeTagProc Blt_MakeElementTag;
662extern MakeTagProc Blt_MakeMarkerTag;
663extern MakeTagProc Blt_MakeAxisTag;
664
665extern Blt_BindTagProc Blt_GraphTags;
666extern Blt_BindTagProc Blt_AxisTags;
667
668extern int Blt_GraphType _ANSI_ARGS_((Graph *graphPtr));
669
670/* ---------------------- Global declarations ------------------------ */
671
672extern Blt_Uid bltBarElementUid;
673extern Blt_Uid bltLineElementUid;
674extern Blt_Uid bltStripElementUid;
675extern Blt_Uid bltLineMarkerUid;
676extern Blt_Uid bltBitmapMarkerUid;
677extern Blt_Uid bltImageMarkerUid;
678extern Blt_Uid bltTextMarkerUid;
679extern Blt_Uid bltPolygonMarkerUid;
680extern Blt_Uid bltWindowMarkerUid;
681extern Blt_Uid bltXAxisUid;
682extern Blt_Uid bltYAxisUid;
683
684#endif /* _BLT_GRAPH_H */
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