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/*
* bltGrElem.h --
*
* Copyright 1993-2004 George A Howlett.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _BLT_GR_ELEM_H
#define _BLT_GR_ELEM_H
#include <bltVector.h>
#include <bltDataTable.h>
#define ELEM_SOURCE_VALUES 0
#define ELEM_SOURCE_VECTOR 1
#define ELEM_SOURCE_TABLE 2
#define SEARCH_X 0
#define SEARCH_Y 1
#define SEARCH_BOTH 2
#define SHOW_NONE 0
#define SHOW_X 1
#define SHOW_Y 2
#define SHOW_BOTH 3
#define SEARCH_POINTS 0 /* Search for closest data point. */
#define SEARCH_TRACES 1 /* Search for closest point on trace.
* Interpolate the connecting line segments if
* necessary. */
#define SEARCH_AUTO 2 /* Automatically determine whether to search
* for data points or traces. Look for traces
* if the linewidth is > 0 and if there is
* more than one data point. */
#define LABEL_ACTIVE (1<<9) /* Non-zero indicates that the element's entry
* in the legend should be drawn in its active
* foreground and background colors. */
#define SCALE_SYMBOL (1<<10)
#define NUMBEROFPOINTS(e) MIN((e)->x.nValues, (e)->y.nValues)
#define NORMALPEN(e) ((((e)->normalPenPtr == NULL) ? \
(e)->builtinPenPtr : \
(e)->normalPenPtr))
/*
*---------------------------------------------------------------------------
*
* Weight --
*
* Designates a range of values by a minimum and maximum limit.
*
*---------------------------------------------------------------------------
*/
typedef struct {
double min, max, range;
} Weight;
#define SetRange(l) \
((l).range = ((l).max > (l).min) ? ((l).max - (l).min) : DBL_EPSILON)
#define SetScale(l) \
((l).scale = 1.0 / (l).range)
#define SetWeight(l, lo, hi) \
((l).min = (lo), (l).max = (hi), SetRange(l))
typedef struct {
Segment2d *segments; /* Point to start of this pen's X-error bar
* segments in the element's array. */
int nSegments;
} ErrorBarSegments;
/*
* An element has one or more vectors plus several attributes, such as line
* style, thickness, color, and symbol type. It has an identifier which
* distinguishes it among the list of all elements.
*/
typedef struct {
Weight weight; /* Weight range where this pen is valid. */
Pen *penPtr; /* Pen to use. */
} PenStyle;
typedef struct {
XColor *color; /* Color of error bar */
int lineWidth; /* Width of the error bar segments. */
GC gc;
int show; /* Flags for errorbars: none, x, y, or both */
} ErrorBarAttributes;
typedef struct {
/* Inputs */
int halo; /* Maximal screen distance a candidate point
* can be from the sample window coordinate */
int mode; /* Indicates whether to find the closest data
* point or the closest point on the trace by
* interpolating the line segments. Can also
* be SEARCH_AUTO, indicating to choose how to
* search.*/
int x, y; /* Screen coordinates of test point */
int along; /* Indicates to let search run along a
* particular axis: x, y, or both. */
/* Outputs */
Element *elemPtr; /* Name of the closest element */
Point2d point; /* Graph coordinates of closest point */
int index; /* Index of closest data point */
double dist; /* Distance in screen coordinates */
} ClosestSearch;
typedef void (ElementDrawProc) (Graph *graphPtr, Drawable drawable,
Element *elemPtr);
typedef void (ElementToPostScriptProc) (Graph *graphPtr, Blt_Ps ps,
Element *elemPtr);
typedef void (ElementDestroyProc) (Graph *graphPtr, Element *elemPtr);
typedef int (ElementConfigProc) (Graph *graphPtr, Element *elemPtr);
typedef void (ElementMapProc) (Graph *graphPtr, Element *elemPtr);
typedef void (ElementExtentsProc) (Element *elemPtr, Region2d *extsPtr);
typedef void (ElementClosestProc) (Graph *graphPtr, Element *elemPtr,
ClosestSearch *searchPtr);
typedef void (ElementDrawSymbolProc) (Graph *graphPtr, Drawable drawable,
Element *elemPtr, int x, int y, int symbolSize);
typedef void (ElementSymbolToPostScriptProc) (Graph *graphPtr,
Blt_Ps ps, Element *elemPtr, double x, double y, int symSize);
typedef struct {
ElementClosestProc *closestProc;
ElementConfigProc *configProc;
ElementDestroyProc *destroyProc;
ElementDrawProc *drawActiveProc;
ElementDrawProc *drawNormalProc;
ElementDrawSymbolProc *drawSymbolProc;
ElementExtentsProc *extentsProc;
ElementToPostScriptProc *printActiveProc;
ElementToPostScriptProc *printNormalProc;
ElementSymbolToPostScriptProc *printSymbolProc;
ElementMapProc *mapProc;
} ElementProcs;
typedef struct {
Blt_VectorId vector;
} VectorDataSource;
typedef struct {
Blt_Table table; /* Data table. */
Blt_TableColumn column; /* Column of data used. */
Blt_TableNotifier notifier; /* Notifier used for column destroy
* event. */
Blt_TableTrace trace; /* Trace used for column
* (set/get/unset). */
Blt_HashEntry *hashPtr; /* Pointer to the entry of the data
* source in graph's hash table of
* datatables. One graph may use
* multiple columns from the same data
* table. */
} TableDataSource;
/*
* The data structure below contains information pertaining to a line vector.
* It consists of an array of floating point data values and for convenience,
* the number and minimum/maximum values.
*/
typedef struct {
int type; /* Selects the type of data populating this
* vector: ELEM_SOURCE_VECTOR,
* ELEM_SOURCE_TABLE, or ELEM_SOURCE_VALUES
*/
Element *elemPtr; /* Element associated with vector. */
union {
TableDataSource tableSource;
VectorDataSource vectorSource;
};
double *values;
int nValues;
int arraySize;
double min, max;
} ElemValues;
struct _Element {
GraphObj obj; /* Must be first field in element. */
unsigned int flags;
Blt_HashEntry *hashPtr;
/* Fields specific to elements. */
const char *label; /* Label displayed in legend */
unsigned short row, col; /* Position of the entry in the
* legend. */
int legendRelief; /* Relief of label in legend. */
Axis2d axes; /* X-axis and Y-axis mapping the
* element */
ElemValues x, y, w; /* Contains array of floating point
* graph coordinate values. Also holds
* min/max and the number of
* coordinates */
int *activeIndices; /* Array of indices (malloc-ed) which
* indicate which data points are
* active (drawn with "active"
* colors). */
int nActiveIndices; /* Number of active data points.
* Special case: if nActiveIndices < 0
* and the active bit is set in
* "flags", then all data points are
* drawn active. */
ElementProcs *procsPtr;
Blt_ConfigSpec *configSpecs; /* Configuration specifications. */
Pen *activePenPtr; /* Standard Pens */
Pen *normalPenPtr;
Pen *builtinPenPtr;
Blt_Chain stylePalette; /* Palette of pens. */
/* Symbol scaling */
int scaleSymbols; /* If non-zero, the symbols will scale
* in size as the graph is zoomed
* in/out. */
double xRange, yRange; /* Initial X-axis and Y-axis ranges:
* used to scale the size of element's
* symbol. */
int state;
Blt_ChainLink link; /* Element's link in display list. */
};
BLT_EXTERN double Blt_FindElemValuesMinimum(ElemValues *vecPtr, double minLimit);
BLT_EXTERN void Blt_ResizeStatusArray(Element *elemPtr, int nPoints);
BLT_EXTERN int Blt_GetPenStyle(Graph *graphPtr, char *name, size_t classId,
PenStyle *stylePtr);
BLT_EXTERN void Blt_FreeStylePalette (Blt_Chain stylePalette);
BLT_EXTERN PenStyle **Blt_StyleMap (Element *elemPtr);
BLT_EXTERN void Blt_MapErrorBars(Graph *graphPtr, Element *elemPtr,
PenStyle **dataToStyle);
BLT_EXTERN void Blt_FreeDataValues(ElemValues *evPtr);
BLT_EXTERN int Blt_GetElement(Tcl_Interp *interp, Graph *graphPtr,
Tcl_Obj *objPtr, Element **elemPtrPtr);
BLT_EXTERN void Blt_DestroyTableClients(Graph *graphPtr);
#endif /* _BLT_GR_ELEM_H */
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