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|
/*
* bltGraph.c --
*
* This module implements a graph widget for the BLT toolkit.
*
* The graph widget was created by Sani Nassif and George Howlett.
*
* Copyright 1991-2004 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.
*/
/*
* To do:
*
* 2) Update manual pages.
*
* 3) Update comments.
*
* 5) Surface, contour, and flow graphs
*
* 7) Arrows for line markers
*
*/
#include <assert.h>
#include <X11/Xutil.h>
#include "bltMath.h"
#include "bltGraph.h"
#include "bltOp.h"
#include "bltBind.h"
#include "bltGrElem.h"
#include "bltGrLegd.h"
#include "bltSwitch.h"
#include "bltPicture.h"
typedef int (GraphCmdProc)(Graph *graphPtr, Tcl_Interp *interp, int objc,
Tcl_Obj *const *objv);
/*
* Objects in the graph have their own class names. These class names are
* used for the resource database and bindings. Example.
*
* option add *X.title "X Axis Title" widgetDefault
* .g marker bind BitmapMarker <Enter> { ... }
*
* The option database trick is performed by creating a temporary window when
* an object is initially configured. The class name of the temporary window
* will be from the list below.
*/
static const char *objectClassNames[] = {
"unknown",
"XAxis",
"YAxis",
"BarElement",
"ContourElement",
"LineElement",
"StripElement",
"BitmapMarker",
"ImageMarker",
"LineMarker",
"PolygonMarker",
"TextMarker",
"WindowMarker",
};
extern Blt_CustomOption bltLinePenOption;
extern Blt_CustomOption bltBarPenOption;
extern Blt_CustomOption bltBarModeOption;
#define DEF_GRAPH_ASPECT_RATIO "0.0"
#define DEF_GRAPH_BAR_BASELINE "0.0"
#define DEF_GRAPH_BAR_MODE "normal"
#define DEF_GRAPH_BAR_WIDTH "0.9"
#define DEF_GRAPH_BACKGROUND STD_NORMAL_BACKGROUND
#define DEF_GRAPH_BORDERWIDTH STD_BORDERWIDTH
#define DEF_GRAPH_BUFFER_ELEMENTS "yes"
#define DEF_GRAPH_BUFFER_GRAPH "1"
#define DEF_GRAPH_CURSOR "crosshair"
#define DEF_GRAPH_FONT "{Sans Serif} 12"
#define DEF_GRAPH_HALO "2m"
#define DEF_GRAPH_HALO_BAR "0.1i"
#define DEF_GRAPH_HEIGHT "4i"
#define DEF_GRAPH_HIGHLIGHT_BACKGROUND STD_NORMAL_BACKGROUND
#define DEF_GRAPH_HIGHLIGHT_COLOR RGB_BLACK
#define DEF_GRAPH_HIGHLIGHT_WIDTH "2"
#define DEF_GRAPH_INVERT_XY "0"
#define DEF_GRAPH_JUSTIFY "center"
#define DEF_GRAPH_MARGIN "0"
#define DEF_GRAPH_MARGIN_VAR (char *)NULL
#define DEF_GRAPH_PLOT_BACKGROUND RGB_WHITE
#define DEF_GRAPH_PLOT_BORDERWIDTH "1"
#define DEF_GRAPH_PLOT_PADX "0"
#define DEF_GRAPH_PLOT_PADY "0"
#define DEF_GRAPH_PLOT_RELIEF "solid"
#define DEF_GRAPH_RELIEF "flat"
#define DEF_GRAPH_SHOW_VALUES "no"
#define DEF_GRAPH_STACK_AXES "no"
#define DEF_GRAPH_TAKE_FOCUS ""
#define DEF_GRAPH_TITLE (char *)NULL
#define DEF_GRAPH_TITLE_COLOR STD_NORMAL_FOREGROUND
#define DEF_GRAPH_WIDTH "5i"
#define DEF_GRAPH_DATA (char *)NULL
#define DEF_GRAPH_DATA_COMMAND (char *)NULL
#define DEF_GRAPH_UNMAP_HIDDEN_ELEMENTS "0"
static Blt_ConfigSpec configSpecs[] =
{
{BLT_CONFIG_FLOAT, "-aspect", "aspect", "Aspect", DEF_GRAPH_ASPECT_RATIO,
Blt_Offset(Graph, aspect), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_BACKGROUND, "-background", "background", "Background",
DEF_GRAPH_BACKGROUND, Blt_Offset(Graph, normalBg), 0},
{BLT_CONFIG_CUSTOM, "-barmode", "barMode", "BarMode", DEF_GRAPH_BAR_MODE,
Blt_Offset(Graph, mode), BLT_CONFIG_DONT_SET_DEFAULT,
&bltBarModeOption},
{BLT_CONFIG_FLOAT, "-barwidth", "barWidth", "BarWidth",
DEF_GRAPH_BAR_WIDTH, Blt_Offset(Graph, barWidth), 0},
{BLT_CONFIG_FLOAT, "-baseline", "baseline", "Baseline",
DEF_GRAPH_BAR_BASELINE, Blt_Offset(Graph, baseline), 0},
{BLT_CONFIG_SYNONYM, "-bd", "borderWidth", (char *)NULL, (char *)NULL,0, 0},
{BLT_CONFIG_SYNONYM, "-bg", "background", (char *)NULL, (char *)NULL, 0, 0},
{BLT_CONFIG_SYNONYM, "-bm", "bottomMargin", (char *)NULL, (char *)NULL,
0, 0},
{BLT_CONFIG_PIXELS_NNEG, "-borderwidth", "borderWidth", "BorderWidth",
DEF_GRAPH_BORDERWIDTH, Blt_Offset(Graph, borderWidth),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS_NNEG, "-bottommargin", "bottomMargin", "Margin",
DEF_GRAPH_MARGIN, Blt_Offset(Graph, bottomMargin.reqSize), 0},
{BLT_CONFIG_STRING, "-bottomvariable", "bottomVariable", "BottomVariable",
DEF_GRAPH_MARGIN_VAR, Blt_Offset(Graph, bottomMargin.varName),
BLT_CONFIG_NULL_OK},
{BLT_CONFIG_BOOLEAN, "-bufferelements", "bufferElements", "BufferElements",
DEF_GRAPH_BUFFER_ELEMENTS, Blt_Offset(Graph, backingStore),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_BOOLEAN, "-buffergraph", "bufferGraph", "BufferGraph",
DEF_GRAPH_BUFFER_GRAPH, Blt_Offset(Graph, doubleBuffer),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
DEF_GRAPH_CURSOR, Blt_Offset(Graph, cursor), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_STRING, "-data", "data", "Data",
(char *)NULL, Blt_Offset(Graph, data), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_STRING, "-datacommand", "dataCommand", "DataCommand",
(char *)NULL, Blt_Offset(Graph, dataCmd), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_SYNONYM, "-fg", "foreground", (char *)NULL, (char *)NULL, 0, 0},
{BLT_CONFIG_FONT, "-font", "font", "Font",
DEF_GRAPH_FONT, Blt_Offset(Graph, titleTextStyle.font), 0},
{BLT_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
DEF_GRAPH_TITLE_COLOR, Blt_Offset(Graph, titleTextStyle.color), 0},
{BLT_CONFIG_PIXELS_NNEG, "-halo", "halo", "Halo", DEF_GRAPH_HALO,
Blt_Offset(Graph, halo), 0},
{BLT_CONFIG_PIXELS_NNEG, "-height", "height", "Height", DEF_GRAPH_HEIGHT,
Blt_Offset(Graph, reqHeight), 0},
{BLT_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
"HighlightBackground", DEF_GRAPH_HIGHLIGHT_BACKGROUND,
Blt_Offset(Graph, highlightBgColor), 0},
{BLT_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
DEF_GRAPH_HIGHLIGHT_COLOR, Blt_Offset(Graph, highlightColor), 0},
{BLT_CONFIG_PIXELS_NNEG, "-highlightthickness", "highlightThickness",
"HighlightThickness", DEF_GRAPH_HIGHLIGHT_WIDTH,
Blt_Offset(Graph, highlightWidth), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_BITMASK, "-unmaphiddenelements", "unmapHiddenElements",
"UnmapHiddenElements", DEF_GRAPH_UNMAP_HIDDEN_ELEMENTS,
Blt_Offset(Graph, flags), ALL_GRAPHS | BLT_CONFIG_DONT_SET_DEFAULT,
(Blt_CustomOption *)UNMAP_HIDDEN},
{BLT_CONFIG_BOOLEAN, "-invertxy", "invertXY", "InvertXY",
DEF_GRAPH_INVERT_XY, Blt_Offset(Graph, inverted),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_JUSTIFY, "-justify", "justify", "Justify", DEF_GRAPH_JUSTIFY,
Blt_Offset(Graph, titleTextStyle.justify), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS_NNEG, "-leftmargin", "leftMargin", "Margin",
DEF_GRAPH_MARGIN, Blt_Offset(Graph, leftMargin.reqSize),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_STRING, "-leftvariable", "leftVariable", "LeftVariable",
DEF_GRAPH_MARGIN_VAR, Blt_Offset(Graph, leftMargin.varName),
BLT_CONFIG_NULL_OK},
{BLT_CONFIG_SYNONYM, "-lm", "leftMargin", (char *)NULL, (char *)NULL, 0, 0},
{BLT_CONFIG_BACKGROUND, "-plotbackground", "plotBackground", "Background",
DEF_GRAPH_PLOT_BACKGROUND, Blt_Offset(Graph, plotBg), 0},
{BLT_CONFIG_PIXELS_NNEG, "-plotborderwidth", "plotBorderWidth",
"PlotBorderWidth", DEF_GRAPH_PLOT_BORDERWIDTH,
Blt_Offset(Graph, plotBW), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PAD, "-plotpadx", "plotPadX", "PlotPad", DEF_GRAPH_PLOT_PADX,
Blt_Offset(Graph, xPad), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PAD, "-plotpady", "plotPadY", "PlotPad", DEF_GRAPH_PLOT_PADY,
Blt_Offset(Graph, yPad), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_RELIEF, "-plotrelief", "plotRelief", "Relief",
DEF_GRAPH_PLOT_RELIEF, Blt_Offset(Graph, plotRelief),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_RELIEF, "-relief", "relief", "Relief", DEF_GRAPH_RELIEF,
Blt_Offset(Graph, relief), BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS_NNEG, "-rightmargin", "rightMargin", "Margin",
DEF_GRAPH_MARGIN, Blt_Offset(Graph, rightMargin.reqSize),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_STRING, "-rightvariable", "rightVariable", "RightVariable",
DEF_GRAPH_MARGIN_VAR, Blt_Offset(Graph, rightMargin.varName),
BLT_CONFIG_NULL_OK},
{BLT_CONFIG_SYNONYM, "-rm", "rightMargin", (char *)NULL, (char *)NULL, 0,0},
{BLT_CONFIG_BOOLEAN, "-stackaxes", "stackAxes", "StackAxes",
DEF_GRAPH_STACK_AXES, Blt_Offset(Graph, stackAxes),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_GRAPH_TAKE_FOCUS, Blt_Offset(Graph, takeFocus), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_STRING, "-title", "title", "Title", DEF_GRAPH_TITLE,
Blt_Offset(Graph, title), BLT_CONFIG_NULL_OK},
{BLT_CONFIG_SYNONYM, "-tm", "topMargin", (char *)NULL, (char *)NULL, 0, 0},
{BLT_CONFIG_PIXELS_NNEG, "-topmargin", "topMargin", "Margin",
DEF_GRAPH_MARGIN, Blt_Offset(Graph, topMargin.reqSize),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_STRING, "-topvariable", "topVariable", "TopVariable",
DEF_GRAPH_MARGIN_VAR, Blt_Offset(Graph, topMargin.varName),
BLT_CONFIG_NULL_OK},
{BLT_CONFIG_PIXELS_NNEG, "-width", "width", "Width", DEF_GRAPH_WIDTH,
Blt_Offset(Graph, reqWidth), 0},
{BLT_CONFIG_PIXELS_NNEG, "-plotwidth", "plotWidth", "PlotWidth",
(char *)NULL, Blt_Offset(Graph, reqPlotWidth),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_PIXELS_NNEG, "-plotheight", "plotHeight", "PlotHeight",
(char *)NULL, Blt_Offset(Graph, reqPlotHeight),
BLT_CONFIG_DONT_SET_DEFAULT},
{BLT_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0}
};
static Blt_SwitchParseProc ObjToFormat;
static Blt_SwitchCustom formatSwitch =
{
ObjToFormat, NULL, (ClientData)0,
};
typedef struct {
const char *name;
int width, height;
int format;
} SnapSwitches;
enum SnapFormats { FORMAT_PICTURE, FORMAT_PHOTO, FORMAT_EMF, FORMAT_WMF };
static Blt_SwitchSpec snapSwitches[] =
{
{BLT_SWITCH_INT_POS, "-width", "width",
Blt_Offset(SnapSwitches, width), 0},
{BLT_SWITCH_INT_POS, "-height", "height",
Blt_Offset(SnapSwitches, height), 0},
{BLT_SWITCH_CUSTOM, "-format", "format",
Blt_Offset(SnapSwitches, format), 0, 0, &formatSwitch},
{BLT_SWITCH_END}
};
static Tcl_IdleProc DisplayGraph;
static Tcl_FreeProc DestroyGraph;
static Tk_EventProc GraphEventProc;
Tcl_ObjCmdProc Blt_GraphInstCmdProc;
static Blt_BindPickProc PickEntry;
static Tcl_ObjCmdProc BarchartCmd;
static Tcl_ObjCmdProc GraphCmd;
static Tcl_CmdDeleteProc GraphInstCmdDeleteProc;
/*
*---------------------------------------------------------------------------
*
* Blt_UpdateGraph --
*
* Tells the Tk dispatcher to call the graph display routine at the next
* idle point. This request is made only if the window is displayed and
* no other redraw request is pending.
*
* Results: None.
*
* Side effects:
* The window is eventually redisplayed.
*
*---------------------------------------------------------------------------
*/
void
Blt_UpdateGraph(ClientData clientData)
{
Graph *graphPtr = clientData;
graphPtr->flags |= REDRAW_WORLD;
if ((graphPtr->tkwin != NULL) && !(graphPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayGraph, graphPtr);
graphPtr->flags |= REDRAW_PENDING;
}
}
/*
*---------------------------------------------------------------------------
*
* Blt_EventuallyRedrawGraph --
*
* Tells the Tk dispatcher to call the graph display routine at the next
* idle point. This request is made only if the window is displayed and
* no other redraw request is pending.
*
* Results: None.
*
* Side effects:
* The window is eventually redisplayed.
*
*---------------------------------------------------------------------------
*/
void
Blt_EventuallyRedrawGraph(Graph *graphPtr)
{
if ((graphPtr->tkwin != NULL) && !(graphPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayGraph, graphPtr);
graphPtr->flags |= REDRAW_PENDING;
}
}
const char *
Blt_GraphClassName(ClassId classId)
{
if ((classId >= CID_NONE) && (classId <= CID_MARKER_WINDOW)) {
return objectClassNames[classId];
}
return NULL;
}
void
Blt_GraphSetObjectClass(GraphObj *graphObjPtr, ClassId classId)
{
graphObjPtr->classId = classId;
graphObjPtr->className = Blt_GraphClassName(classId);
}
/*
*---------------------------------------------------------------------------
*
* GraphEventProc --
*
* This procedure is invoked by the Tk dispatcher for various events on
* graphs.
*
* Results:
* None.
*
* Side effects:
* When the window gets deleted, internal structures get cleaned up.
* When it gets exposed, the graph is eventually redisplayed.
*
*---------------------------------------------------------------------------
*/
static void
GraphEventProc(ClientData clientData, XEvent *eventPtr)
{
Graph *graphPtr = clientData;
if (eventPtr->type == Expose) {
if (eventPtr->xexpose.count == 0) {
graphPtr->flags |= REDRAW_WORLD;
Blt_EventuallyRedrawGraph(graphPtr);
}
} else if ((eventPtr->type == FocusIn) || (eventPtr->type == FocusOut)) {
if (eventPtr->xfocus.detail != NotifyInferior) {
if (eventPtr->type == FocusIn) {
graphPtr->flags |= FOCUS;
} else {
graphPtr->flags &= ~FOCUS;
}
graphPtr->flags |= REDRAW_WORLD;
Blt_EventuallyRedrawGraph(graphPtr);
}
} else if (eventPtr->type == DestroyNotify) {
if (graphPtr->tkwin != NULL) {
Blt_DeleteWindowInstanceData(graphPtr->tkwin);
graphPtr->tkwin = NULL;
Tcl_DeleteCommandFromToken(graphPtr->interp, graphPtr->cmdToken);
}
if (graphPtr->flags & REDRAW_PENDING) {
Tcl_CancelIdleCall(DisplayGraph, graphPtr);
}
Tcl_EventuallyFree(graphPtr, DestroyGraph);
} else if (eventPtr->type == ConfigureNotify) {
graphPtr->flags |= (MAP_WORLD | REDRAW_WORLD);
Blt_EventuallyRedrawGraph(graphPtr);
}
}
/*
*---------------------------------------------------------------------------
*
* GraphInstCmdDeleteProc --
*
* This procedure is invoked when a widget command is deleted. If the
* widget isn't already in the process of being destroyed, this command
* destroys it.
*
* Results:
* None.
*
* Side effects:
* The widget is destroyed.
*
*---------------------------------------------------------------------------
*/
static void
GraphInstCmdDeleteProc(ClientData clientData) /* Pointer to widget record. */
{
Graph *graphPtr = clientData;
if (graphPtr->tkwin != NULL) { /* NULL indicates window has already
* been destroyed. */
Tk_Window tkwin;
tkwin = graphPtr->tkwin;
graphPtr->tkwin = NULL;
Blt_DeleteWindowInstanceData(tkwin);
Tk_DestroyWindow(tkwin);
}
}
/*
*---------------------------------------------------------------------------
*
* AdjustAxisPointers --
*
* Sets the axis pointers according to whether the axis is inverted on
* not. The axis sites are also reset.
*
* Results:
* None.
*
*---------------------------------------------------------------------------
*/
static void
AdjustAxisPointers(Graph *graphPtr)
{
if (graphPtr->inverted) {
graphPtr->leftMargin.axes = graphPtr->axisChain[0];
graphPtr->bottomMargin.axes = graphPtr->axisChain[1];
graphPtr->rightMargin.axes = graphPtr->axisChain[2];
graphPtr->topMargin.axes = graphPtr->axisChain[3];
} else {
graphPtr->leftMargin.axes = graphPtr->axisChain[1];
graphPtr->bottomMargin.axes = graphPtr->axisChain[0];
graphPtr->rightMargin.axes = graphPtr->axisChain[3];
graphPtr->topMargin.axes = graphPtr->axisChain[2];
}
}
static int
InitPens(Graph *graphPtr)
{
Blt_InitHashTable(&graphPtr->penTable, BLT_STRING_KEYS);
if (Blt_CreatePen(graphPtr, "activeLine", CID_ELEM_LINE, 0, NULL) == NULL) {
return TCL_ERROR;
}
if (Blt_CreatePen(graphPtr, "activeBar", CID_ELEM_BAR, 0, NULL) == NULL) {
return TCL_ERROR;
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* Blt_GraphTags --
*
* Sets the binding tags for a graph obj. This routine is called by Tk
* when an event occurs in the graph. It fills an array of pointers with
* bind tag addresses.
*
* The object addresses are strings hashed in one of two tag tables: one
* for elements and the another for markers. Note that there's only one
* binding table for elements and markers. [We don't want to trigger
* both a marker and element bind command for the same event.] But we
* don't want a marker and element with the same tag name to activate the
* others bindings. A tag "all" for markers should mean all markers, not
* all markers and elements. As a result, element and marker tags are
* stored in separate hash tables, which means we can't generate the same
* tag address for both an elements and marker, even if they have the
* same name.
*
* Results:
* None.
*
* Side effects:
* This information will be used by the binding code in bltUtil.c to
* determine what graph objects match the current event. The tags are
* placed in tagArr and *nTagsPtr is set with the number of tags found.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
void
Blt_GraphTags(
Blt_BindTable table,
ClientData object,
ClientData context, /* Not used. */
Blt_List list)
{
GraphObj *graphObjPtr;
MakeTagProc *tagProc;
Graph *graphPtr;
graphPtr = (Graph *)Blt_GetBindingData(table);
/*
* All graph objects (markers, elements, axes, etc) have the same starting
* fields in their structures, such as "classId", "name", "className", and
* "tags".
*/
graphObjPtr = (GraphObj *)object;
switch (graphObjPtr->classId) {
case CID_ELEM_BAR:
case CID_ELEM_LINE:
tagProc = Blt_MakeElementTag;
break;
case CID_AXIS_X:
case CID_AXIS_Y:
tagProc = Blt_MakeAxisTag;
break;
case CID_MARKER_BITMAP:
case CID_MARKER_IMAGE:
case CID_MARKER_LINE:
case CID_MARKER_POLYGON:
case CID_MARKER_TEXT:
case CID_MARKER_WINDOW:
tagProc = Blt_MakeMarkerTag;
break;
case CID_NONE:
Blt_Panic("unknown object type");
tagProc = NULL;
break;
default:
Blt_Panic("bogus object type");
tagProc = NULL;
break;
}
assert(graphObjPtr->name != NULL);
/* Always add the name of the object to the tag array. */
Blt_List_Append(list, (*tagProc)(graphPtr, graphObjPtr->name), 0);
Blt_List_Append(list, (*tagProc)(graphPtr, graphObjPtr->className), 0);
if (graphObjPtr->tags != NULL) {
const char **p;
for (p = graphObjPtr->tags; *p != NULL; p++) {
Blt_List_Append(list, (*tagProc) (graphPtr, *p), 0);
}
}
}
/*
* Find the closest point from the set of displayed elements, searching
* the display list from back to front. That way, if the points from
* two different elements overlay each other exactly, the one that's on
* top (visible) is picked.
*/
/*ARGSUSED*/
static ClientData
PickEntry(ClientData clientData, int x, int y, ClientData *contextPtr)
{
Graph *graphPtr = clientData;
Blt_ChainLink link;
Element *elemPtr;
Marker *markerPtr;
Region2d exts;
if (graphPtr->flags & MAP_ALL) {
return NULL; /* Don't pick anything until the next
* redraw occurs. */
}
Blt_GraphExtents(graphPtr, &exts);
if ((x >= exts.right) || (x < exts.left) ||
(y >= exts.bottom) || (y < exts.top)) {
/*
* Sample coordinate is in one of the graph margins. Can only pick an
* axis.
*/
return Blt_NearestAxis(graphPtr, x, y);
}
/*
* From top-to-bottom check:
* 1. markers drawn on top (-under false).
* 2. elements using its display list back to front.
* 3. markers drawn under element (-under true).
*/
markerPtr = Blt_NearestMarker(graphPtr, x, y, FALSE);
if (markerPtr != NULL) {
return markerPtr; /* Found a marker (-under false). */
}
{
ClosestSearch search;
search.along = SEARCH_BOTH;
search.halo = graphPtr->halo;
search.index = -1;
search.x = x;
search.y = y;
search.dist = (double)(search.halo + 1);
search.mode = SEARCH_AUTO;
for (link = Blt_Chain_LastLink(graphPtr->elements.displayList);
link != NULL; link = Blt_Chain_PrevLink(link)) {
elemPtr = Blt_Chain_GetValue(link);
if (elemPtr->flags & (HIDE|MAP_ITEM)) {
continue;
}
if (elemPtr->state == STATE_NORMAL) {
(*elemPtr->procsPtr->closestProc) (graphPtr, elemPtr, &search);
}
}
if (search.dist <= (double)search.halo) {
return search.elemPtr; /* Found an element within the minimum
* halo distance. */
}
}
markerPtr = Blt_NearestMarker(graphPtr, x, y, TRUE);
if (markerPtr != NULL) {
return markerPtr; /* Found a marker (-under true) */
}
return NULL; /* Nothing found. */
}
/*
*---------------------------------------------------------------------------
*
* ConfigureGraph --
*
* Allocates resources for the graph.
*
* Results:
* None.
*
* Side effects:
* Configuration information, such as text string, colors, font, etc. get
* set for graphPtr; old resources get freed, if there were any. The
* graph is redisplayed.
*
*---------------------------------------------------------------------------
*/
static void
ConfigureGraph(Graph *graphPtr)
{
XColor *colorPtr;
GC newGC;
XGCValues gcValues;
unsigned long gcMask;
/* Don't allow negative bar widths. Reset to an arbitrary value (0.1) */
if (graphPtr->barWidth <= 0.0f) {
graphPtr->barWidth = 0.8f;
}
graphPtr->inset = graphPtr->borderWidth + graphPtr->highlightWidth;
if ((graphPtr->reqHeight != Tk_ReqHeight(graphPtr->tkwin)) ||
(graphPtr->reqWidth != Tk_ReqWidth(graphPtr->tkwin))) {
Tk_GeometryRequest(graphPtr->tkwin, graphPtr->reqWidth,
graphPtr->reqHeight);
}
Tk_SetInternalBorder(graphPtr->tkwin, graphPtr->borderWidth);
colorPtr = Blt_BackgroundBorderColor(graphPtr->normalBg);
graphPtr->titleWidth = graphPtr->titleHeight = 0;
if (graphPtr->title != NULL) {
unsigned int w, h;
Blt_Ts_GetExtents(&graphPtr->titleTextStyle, graphPtr->title, &w, &h);
graphPtr->titleHeight = h;
}
/*
* Create GCs for interior and exterior regions, and a background GC for
* clearing the margins with XFillRectangle
*/
/* Margin GC */
gcValues.foreground =
Blt_Ts_GetForeground(graphPtr->titleTextStyle)->pixel;
gcValues.background = colorPtr->pixel;
gcMask = (GCForeground | GCBackground);
newGC = Tk_GetGC(graphPtr->tkwin, gcMask, &gcValues);
if (graphPtr->drawGC != NULL) {
Tk_FreeGC(graphPtr->display, graphPtr->drawGC);
}
graphPtr->drawGC = newGC;
if (graphPtr->plotBg != NULL) {
Blt_SetBackgroundChangedProc(graphPtr->plotBg, Blt_UpdateGraph,
graphPtr);
}
if (graphPtr->normalBg != NULL) {
Blt_SetBackgroundChangedProc(graphPtr->normalBg, Blt_UpdateGraph,
graphPtr);
}
if (Blt_ConfigModified(configSpecs, "-invertxy", (char *)NULL)) {
/*
* If the -inverted option changed, we need to readjust the pointers
* to the axes and recompute the their scales.
*/
AdjustAxisPointers(graphPtr);
graphPtr->flags |= RESET_AXES;
}
if ((!graphPtr->backingStore) && (graphPtr->cache != None)) {
/*
* Free the pixmap if we're not buffering the display of elements
* anymore.
*/
Tk_FreePixmap(graphPtr->display, graphPtr->cache);
graphPtr->cache = None;
}
/*
* Reconfigure the crosshairs, just in case the background color of the
* plotarea has been changed.
*/
Blt_ConfigureCrosshairs(graphPtr);
/*
* Update the layout of the graph (and redraw the elements) if any of the
* following graph options which affect the size of * the plotting area
* has changed.
*
* -aspect
* -borderwidth, -plotborderwidth
* -font, -title
* -width, -height
* -invertxy
* -bottommargin, -leftmargin, -rightmargin, -topmargin,
* -barmode, -barwidth
*/
if (Blt_ConfigModified(configSpecs, "-invertxy", "-title", "-font",
"-*margin", "-*width", "-height", "-barmode", "-*pad*",
"-aspect", "-*borderwidth", "-plot*", "-*width", "-*height",
"-unmaphiddenelements", (char *)NULL)) {
graphPtr->flags |= RESET_WORLD | CACHE_DIRTY;
}
if (Blt_ConfigModified(configSpecs, "-plot*", "-*background",
(char *)NULL)) {
graphPtr->flags |= CACHE_DIRTY;
}
graphPtr->flags |= REDRAW_WORLD;
}
/*
*---------------------------------------------------------------------------
*
* DestroyGraph --
*
* This procedure is invoked by Tcl_EventuallyFree or Tcl_Release to
* clean up the internal structure of a graph at a safe time (when no-one
* is using it anymore).
*
* Results:
* None.
*
* Side effects:
* Everything associated with the widget is freed up.
*
*---------------------------------------------------------------------------
*/
static void DestroyGraph(char* dataPtr)
{
Graph *graphPtr = (Graph *)dataPtr;
Blt_FreeOptions(configSpecs, (char *)graphPtr, graphPtr->display, 0);
/*
* Destroy the individual components of the graph: elements, markers,
* axes, legend, display lists etc. Be careful to remove them in
* order. For example, axes are used by elements and markers, so they have
* to be removed after the markers and elements. Same it true with the
* legend and pens (they use elements), so can't be removed until the
* elements are destroyed.
*/
Blt_DestroyMarkers(graphPtr);
Blt_DestroyElements(graphPtr);
Blt_DestroyLegend(graphPtr);
Blt_DestroyAxes(graphPtr);
Blt_DestroyPens(graphPtr);
Blt_DestroyCrosshairs(graphPtr);
Blt_DestroyPageSetup(graphPtr);
Blt_DestroyBarSets(graphPtr);
if (graphPtr->bindTable != NULL) {
Blt_DestroyBindingTable(graphPtr->bindTable);
}
/* Release allocated X resources and memory. */
if (graphPtr->drawGC != NULL) {
Tk_FreeGC(graphPtr->display, graphPtr->drawGC);
}
Blt_Ts_FreeStyle(graphPtr->display, &graphPtr->titleTextStyle);
if (graphPtr->cache != None) {
Tk_FreePixmap(graphPtr->display, graphPtr->cache);
}
free(graphPtr);
}
/*
*---------------------------------------------------------------------------
*
* CreateGraph --
*
* This procedure creates and initializes a new widget.
*
* Results:
* The return value is a pointer to a structure describing the new
* widget. If an error occurred, then the return value is NULL and an
* error message is left in interp->result.
*
* Side effects:
* Memory is allocated, a Tk_Window is created, etc.
*
*---------------------------------------------------------------------------
*/
static Graph *
CreateGraph(Tcl_Interp *interp, int objc, Tcl_Obj *const *objv, ClassId classId)
{
Graph *graphPtr;
Tk_Window tkwin;
tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp),
Tcl_GetString(objv[1]), (char *)NULL);
if (tkwin == NULL) {
return NULL;
}
graphPtr = calloc(1, sizeof(Graph));
/* Initialize the graph data structure. */
graphPtr->tkwin = tkwin;
graphPtr->display = Tk_Display(tkwin);
graphPtr->interp = interp;
graphPtr->classId = classId;
graphPtr->backingStore = TRUE;
graphPtr->doubleBuffer = TRUE;
graphPtr->borderWidth = 2;
graphPtr->plotBW = 1;
graphPtr->highlightWidth = 2;
graphPtr->plotRelief = TK_RELIEF_SOLID;
graphPtr->relief = TK_RELIEF_FLAT;
graphPtr->flags = RESET_WORLD;
graphPtr->nextMarkerId = 1;
graphPtr->padLeft = graphPtr->padRight = 0;
graphPtr->padTop = graphPtr->padBottom = 0;
graphPtr->bottomMargin.site = MARGIN_BOTTOM;
graphPtr->leftMargin.site = MARGIN_LEFT;
graphPtr->topMargin.site = MARGIN_TOP;
graphPtr->rightMargin.site = MARGIN_RIGHT;
Blt_Ts_InitStyle(graphPtr->titleTextStyle);
Blt_Ts_SetAnchor(graphPtr->titleTextStyle, TK_ANCHOR_N);
Blt_InitHashTable(&graphPtr->axes.table, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->axes.tagTable, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->elements.table, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->elements.tagTable, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->markers.table, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->markers.tagTable, BLT_STRING_KEYS);
Blt_InitHashTable(&graphPtr->dataTables, BLT_STRING_KEYS);
graphPtr->elements.displayList = Blt_Chain_Create();
graphPtr->markers.displayList = Blt_Chain_Create();
graphPtr->axes.displayList = Blt_Chain_Create();
switch (classId) {
case CID_ELEM_LINE:
Tk_SetClass(tkwin, "Graph");
break;
case CID_ELEM_BAR:
Tk_SetClass(tkwin, "Barchart");
break;
default:
Tk_SetClass(tkwin, "???");
break;
}
Blt_SetWindowInstanceData(tkwin, graphPtr);
if (InitPens(graphPtr) != TCL_OK) {
goto error;
}
if (Blt_ConfigureWidgetFromObj(interp, tkwin, configSpecs, objc - 2,
objv + 2, (char *)graphPtr, 0) != TCL_OK) {
goto error;
}
if (Blt_DefaultAxes(graphPtr) != TCL_OK) {
goto error;
}
AdjustAxisPointers(graphPtr);
if (Blt_CreatePageSetup(graphPtr) != TCL_OK) {
goto error;
}
if (Blt_CreateCrosshairs(graphPtr) != TCL_OK) {
goto error;
}
if (Blt_CreateLegend(graphPtr) != TCL_OK) {
goto error;
}
Tk_CreateEventHandler(graphPtr->tkwin,
ExposureMask | StructureNotifyMask | FocusChangeMask, GraphEventProc,
graphPtr);
graphPtr->cmdToken = Tcl_CreateObjCommand(interp, Tcl_GetString(objv[1]),
Blt_GraphInstCmdProc, graphPtr, GraphInstCmdDeleteProc);
ConfigureGraph(graphPtr);
graphPtr->bindTable = Blt_CreateBindingTable(interp, tkwin, graphPtr,
PickEntry, Blt_GraphTags);
Tcl_SetObjResult(interp, objv[1]);
return graphPtr;
error:
DestroyGraph((char*)graphPtr);
return NULL;
}
/* Widget sub-commands */
/*ARGSUSED*/
static int
XAxisOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int margin;
margin = (graphPtr->inverted) ? MARGIN_LEFT : MARGIN_BOTTOM;
return Blt_AxisOp(interp, graphPtr, margin, objc, objv);
}
static int
X2AxisOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int margin;
margin = (graphPtr->inverted) ? MARGIN_RIGHT : MARGIN_TOP;
return Blt_AxisOp(interp, graphPtr, margin, objc, objv);
}
static int
YAxisOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int margin;
margin = (graphPtr->inverted) ? MARGIN_BOTTOM : MARGIN_LEFT;
return Blt_AxisOp(interp, graphPtr, margin, objc, objv);
}
static int
Y2AxisOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int margin;
margin = (graphPtr->inverted) ? MARGIN_TOP : MARGIN_RIGHT;
return Blt_AxisOp(interp, graphPtr, margin, objc, objv);
}
static int
BarOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
return Blt_ElementOp(graphPtr, interp, objc, objv, CID_ELEM_BAR);
}
/*ARGSUSED*/
static int
LineOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
return Blt_ElementOp(graphPtr, interp, objc, objv, CID_ELEM_LINE);
}
static int
ElementOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
return Blt_ElementOp(graphPtr, interp, objc, objv, graphPtr->classId);
}
static int
ConfigureOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int flags;
flags = BLT_CONFIG_OBJV_ONLY;
if (objc == 2) {
return Blt_ConfigureInfoFromObj(interp, graphPtr->tkwin, configSpecs,
(char *)graphPtr, (Tcl_Obj *)NULL, flags);
} else if (objc == 3) {
return Blt_ConfigureInfoFromObj(interp, graphPtr->tkwin, configSpecs,
(char *)graphPtr, objv[2], flags);
} else {
if (Blt_ConfigureWidgetFromObj(interp, graphPtr->tkwin, configSpecs,
objc - 2, objv + 2, (char *)graphPtr, flags) != TCL_OK) {
return TCL_ERROR;
}
ConfigureGraph(graphPtr);
Blt_EventuallyRedrawGraph(graphPtr);
return TCL_OK;
}
}
/* ARGSUSED*/
static int
CgetOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
return Blt_ConfigureValueFromObj(interp, graphPtr->tkwin, configSpecs,
(char *)graphPtr, objv[2], 0);
}
/*
*---------------------------------------------------------------------------
*
* ExtentsOp --
*
* Reports the size of one of several items within the graph. The
* following are valid items:
*
* "bottommargin" Height of the bottom margin
* "leftmargin" Width of the left margin
* "legend" x y w h of the legend
* "plotarea" x y w h of the plotarea
* "plotheight" Height of the plot area
* "rightmargin" Width of the right margin
* "topmargin" Height of the top margin
* "plotwidth" Width of the plot area
*
* Results:
* Always returns TCL_OK.
*
*---------------------------------------------------------------------------
*/
/* ARGSUSED*/
static int
ExtentsOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
const char *string;
char c;
int length;
string = Tcl_GetStringFromObj(objv[2], &length);
c = string[0];
if ((c == 'p') && (length > 4) &&
(strncmp("plotheight", string, length) == 0)) {
int height;
height = graphPtr->bottom - graphPtr->top + 1;
Tcl_SetIntObj(Tcl_GetObjResult(interp), height);
} else if ((c == 'p') && (length > 4) &&
(strncmp("plotwidth", string, length) == 0)) {
int width;
width = graphPtr->right - graphPtr->left + 1;
Tcl_SetIntObj(Tcl_GetObjResult(interp), width);
} else if ((c == 'p') && (length > 4) &&
(strncmp("plotarea", string, length) == 0)) {
Tcl_Obj *listObjPtr;
listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **)NULL);
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(graphPtr->left));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(graphPtr->top));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(graphPtr->right - graphPtr->left + 1));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(graphPtr->bottom - graphPtr->top + 1));
Tcl_SetObjResult(interp, listObjPtr);
} else if ((c == 'l') && (length > 2) &&
(strncmp("legend", string, length) == 0)) {
Tcl_Obj *listObjPtr;
listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **)NULL);
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(Blt_Legend_X(graphPtr)));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(Blt_Legend_Y(graphPtr)));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(Blt_Legend_Width(graphPtr)));
Tcl_ListObjAppendElement(interp, listObjPtr,
Tcl_NewIntObj(Blt_Legend_Height(graphPtr)));
Tcl_SetObjResult(interp, listObjPtr);
} else if ((c == 'l') && (length > 2) &&
(strncmp("leftmargin", string, length) == 0)) {
Tcl_SetIntObj(Tcl_GetObjResult(interp), graphPtr->leftMargin.width);
} else if ((c == 'r') && (length > 1) &&
(strncmp("rightmargin", string, length) == 0)) {
Tcl_SetIntObj(Tcl_GetObjResult(interp), graphPtr->rightMargin.width);
} else if ((c == 't') && (length > 1) &&
(strncmp("topmargin", string, length) == 0)) {
Tcl_SetIntObj(Tcl_GetObjResult(interp), graphPtr->topMargin.height);
} else if ((c == 'b') && (length > 1) &&
(strncmp("bottommargin", string, length) == 0)) {
Tcl_SetIntObj(Tcl_GetObjResult(interp), graphPtr->bottomMargin.height);
} else {
Tcl_AppendResult(interp, "bad extent item \"", objv[2],
"\": should be plotheight, plotwidth, leftmargin, rightmargin, \
topmargin, bottommargin, plotarea, or legend", (char *)NULL);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* InsideOp --
*
* Returns true of false whether the given point is inside the plotting
* area (defined by left,bottom right, top).
*
* Results:
* Always returns TCL_OK. interp->result will contain the boolean string
* representation.
*
*---------------------------------------------------------------------------
*/
/* ARGSUSED*/
static int
InsideOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int x, y;
Region2d exts;
int result;
if (Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) {
return TCL_ERROR;
}
if (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK) {
return TCL_ERROR;
}
Blt_GraphExtents(graphPtr, &exts);
result = PointInRegion(&exts, x, y);
Tcl_SetBooleanObj(Tcl_GetObjResult(interp), result);
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* InvtransformOp --
*
* This procedure returns a list of the graph coordinate values
* corresponding with the given window X and Y coordinate positions.
*
* Results:
* Returns a standard TCL result. If an error occurred while parsing the
* window positions, TCL_ERROR is returned, and interp->result will
* contain the error message. Otherwise interp->result will contain a
* Tcl list of the x and y coordinates.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
static int
InvtransformOp(Graph *graphPtr, Tcl_Interp *interp, int objc,
Tcl_Obj *const *objv)
{
double x, y;
Point2d point;
Axis2d axes;
Tcl_Obj *listObjPtr;
if ((Blt_ExprDoubleFromObj(interp, objv[2], &x) != TCL_OK) ||
(Blt_ExprDoubleFromObj(interp, objv[3], &y) != TCL_OK)) {
return TCL_ERROR;
}
if (graphPtr->flags & RESET_AXES) {
Blt_ResetAxes(graphPtr);
}
/* Perform the reverse transformation, converting from window coordinates
* to graph data coordinates. Note that the point is always mapped to the
* bottom and left axes (which may not be what the user wants). */
/* Pick the first pair of axes */
axes.x = Blt_GetFirstAxis(graphPtr->axisChain[0]);
axes.y = Blt_GetFirstAxis(graphPtr->axisChain[1]);
point = Blt_InvMap2D(graphPtr, x, y, &axes);
listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **)NULL);
Tcl_ListObjAppendElement(interp, listObjPtr, Tcl_NewDoubleObj(point.x));
Tcl_ListObjAppendElement(interp, listObjPtr, Tcl_NewDoubleObj(point.y));
Tcl_SetObjResult(interp, listObjPtr);
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* TransformOp --
*
* This procedure returns a list of the window coordinates corresponding
* with the given graph x and y coordinates.
*
* Results:
* Returns a standard TCL result. interp->result contains the list of
* the graph coordinates. If an error occurred while parsing the window
* positions, TCL_ERROR is returned, then interp->result will contain an
* error message.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
static int
TransformOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
double x, y;
Point2d point;
Axis2d axes;
Tcl_Obj *listObjPtr;
if ((Blt_ExprDoubleFromObj(interp, objv[2], &x) != TCL_OK) ||
(Blt_ExprDoubleFromObj(interp, objv[3], &y) != TCL_OK)) {
return TCL_ERROR;
}
if (graphPtr->flags & RESET_AXES) {
Blt_ResetAxes(graphPtr);
}
/*
* Perform the transformation from window to graph coordinates. Note that
* the points are always mapped onto the bottom and left axes (which may
* not be the what the user wants).
*/
axes.x = Blt_GetFirstAxis(graphPtr->axisChain[0]);
axes.y = Blt_GetFirstAxis(graphPtr->axisChain[1]);
point = Blt_Map2D(graphPtr, x, y, &axes);
listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **)NULL);
Tcl_ListObjAppendElement(interp, listObjPtr, Tcl_NewIntObj(ROUND(point.x)));
Tcl_ListObjAppendElement(interp, listObjPtr, Tcl_NewIntObj(ROUND(point.y)));
Tcl_SetObjResult(interp, listObjPtr);
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* ObjToFormat --
*
* Convert a string represent a node number into its integer value.
*
* Results:
* The return value is a standard TCL result.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
static int
ObjToFormat(
ClientData clientData, /* Not used.*/
Tcl_Interp *interp, /* Interpreter to send results back to */
const char *switchName, /* Not used. */
Tcl_Obj *objPtr, /* String representation */
char *record, /* Structure record */
int offset, /* Offset to field in structure */
int flags) /* Not used. */
{
int *formatPtr = (int *)(record + offset);
char c;
const char *string;
string = Tcl_GetString(objPtr);
c = string[0];
if ((c == 'p') && (strcmp(string, "picture") == 0)) {
*formatPtr = FORMAT_PHOTO;
} else if ((c == 'p') && (strcmp(string, "photo") == 0)) {
*formatPtr = FORMAT_PHOTO;
} else {
Tcl_AppendResult(interp, "bad format \"", string,
"\": should be picture or photo.", (char *)NULL);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* SnapOp --
*
* Snaps a picture of the graph and stores it in the specified image.
*
* Results:
* Returns a standard TCL result. interp->result contains
* the list of the graph coordinates. If an error occurred
* while parsing the window positions, TCL_ERROR is returned,
* then interp->result will contain an error message.
*
*---------------------------------------------------------------------------
*/
static int
SnapOp(Graph *graphPtr, Tcl_Interp *interp, int objc, Tcl_Obj *const *objv)
{
int result;
Pixmap drawable;
int i;
SnapSwitches switches;
/* .g snap ?switches? name */
switches.height = Tk_Height(graphPtr->tkwin);
if ((switches.height < 2) && (graphPtr->reqHeight > 0)) {
switches.height = graphPtr->reqHeight;
}
switches.width = Tk_Width(graphPtr->tkwin);
if ((switches.width < 2) && (graphPtr->reqWidth > 0)) {
switches.width = graphPtr->reqWidth;
}
switches.format = FORMAT_PICTURE;
/* Process switches */
i = Blt_ParseSwitches(interp, snapSwitches, objc - 2, objv + 2, &switches,
BLT_SWITCH_OBJV_PARTIAL);
if (i < 0) {
return TCL_ERROR;
}
i += 2;
if (i >= objc) {
Tcl_AppendResult(interp, "missing name argument: should be \"",
Tcl_GetString(objv[0]), "snap ?switches? name\"", (char *)NULL);
return TCL_ERROR;
}
switches.name = Tcl_GetString(objv[i]);
if (switches.width < 2) {
switches.width = Tk_ReqWidth(graphPtr->tkwin);
}
if (switches.height < 2) {
switches.width = Tk_ReqHeight(graphPtr->tkwin);
}
/* Always re-compute the layout of the graph before snapping the picture. */
graphPtr->width = switches.width;
graphPtr->height = switches.height;
Blt_MapGraph(graphPtr);
drawable = Tk_WindowId(graphPtr->tkwin);
switch (switches.format) {
case FORMAT_PICTURE:
case FORMAT_PHOTO:
drawable = Tk_GetPixmap(graphPtr->display, drawable, graphPtr->width,
graphPtr->height, Tk_Depth(graphPtr->tkwin));
graphPtr->flags |= RESET_WORLD;
Blt_DrawGraph(graphPtr, drawable);
if (switches.format == FORMAT_PICTURE) {
result = Blt_SnapPicture(interp, graphPtr->tkwin, drawable, 0, 0,
switches.width, switches.height, switches.width,
switches.height, switches.name, 1.0);
} else {
result = Blt_SnapPhoto(interp, graphPtr->tkwin, drawable, 0, 0,
switches.width, switches.height, switches.width,
switches.height, switches.name, 1.0);
}
Tk_FreePixmap(graphPtr->display, drawable);
break;
default:
Tcl_AppendResult(interp, "bad snapshot format", (char *)NULL);
return TCL_ERROR;
}
graphPtr->flags |= MAP_WORLD;
Blt_EventuallyRedrawGraph(graphPtr);
return result;
}
/*
*---------------------------------------------------------------------------
*
* GraphWidgetCmd --
*
* 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 Blt_OpSpec graphOps[] =
{
{"axis", 1, Blt_VirtualAxisOp, 2, 0, "oper ?args?",},
{"bar", 2, BarOp, 2, 0, "oper ?args?",},
{"cget", 2, CgetOp, 3, 3, "option",},
{"configure", 2, ConfigureOp, 2, 0, "?option value?...",},
{"crosshairs", 2, Blt_CrosshairsOp, 2, 0, "oper ?args?",},
{"element", 2, ElementOp, 2, 0, "oper ?args?",},
{"extents", 2, ExtentsOp, 3, 3, "item",},
{"inside", 3, InsideOp, 4, 4, "winX winY",},
{"invtransform", 3, InvtransformOp, 4, 4, "winX winY",},
{"legend", 2, Blt_LegendOp, 2, 0, "oper ?args?",},
{"line", 2, LineOp, 2, 0, "oper ?args?",},
{"marker", 2, Blt_MarkerOp, 2, 0, "oper ?args?",},
{"pen", 2, Blt_PenOp, 2, 0, "oper ?args?",},
{"postscript", 2, Blt_PostScriptOp, 2, 0, "oper ?args?",},
{"snap", 1, SnapOp, 3, 0, "?switches? name",},
{"transform", 1, TransformOp, 4, 4, "x y",},
{"x2axis", 2, X2AxisOp, 2, 0, "oper ?args?",},
{"xaxis", 2, XAxisOp, 2, 0, "oper ?args?",},
{"y2axis", 2, Y2AxisOp, 2, 0, "oper ?args?",},
{"yaxis", 2, YAxisOp, 2, 0, "oper ?args?",},
};
static int nGraphOps = sizeof(graphOps) / sizeof(Blt_OpSpec);
int
Blt_GraphInstCmdProc(ClientData clientData, Tcl_Interp *interp, int objc,
Tcl_Obj *const *objv)
{
GraphCmdProc *proc;
int result;
Graph *graphPtr = clientData;
proc = Blt_GetOpFromObj(interp, nGraphOps, graphOps, BLT_OP_ARG1,
objc, objv, 0);
if (proc == NULL) {
return TCL_ERROR;
}
Tcl_Preserve(graphPtr);
result = (*proc) (graphPtr, interp, objc, objv);
Tcl_Release(graphPtr);
return result;
}
/*
*---------------------------------------------------------------------------
*
* NewGraph --
*
* Creates a new window and TCL command representing an instance of a
* graph widget.
*
* Results:
* A standard TCL result.
*
* Side effects:
* See the user documentation.
*
*---------------------------------------------------------------------------
*/
static int
NewGraph(Tcl_Interp *interp, int objc, Tcl_Obj *const *objv, ClassId classId)
{
Graph *graphPtr;
if (objc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"",
Tcl_GetString(objv[0]), " pathName ?option value?...\"",
(char *)NULL);
return TCL_ERROR;
}
graphPtr = CreateGraph(interp, objc, objv, classId);
if (graphPtr == NULL) {
return TCL_ERROR;
}
return TCL_OK;
}
/*
*---------------------------------------------------------------------------
*
* GraphCmd --
*
* Creates a new window and TCL command representing an instance of a
* graph widget.
*
* Results:
* A standard TCL result.
*
* Side effects:
* See the user documentation.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
static int
GraphCmd(ClientData clientData, Tcl_Interp *interp, int objc,
Tcl_Obj *const *objv)
{
return NewGraph(interp, objc, objv, CID_ELEM_LINE);
}
/*
*---------------------------------------------------------------------------
*
* BarchartCmd --
*
* Creates a new window and TCL command representing an instance of a
* barchart widget.
*
* Results:
* A standard TCL result.
*
* Side effects:
* See the user documentation.
*
*---------------------------------------------------------------------------
*/
/*ARGSUSED*/
static int
BarchartCmd(ClientData clientData, Tcl_Interp *interp, int objc,
Tcl_Obj *const *objv)
{
return NewGraph(interp, objc, objv, CID_ELEM_BAR);
}
/*
*---------------------------------------------------------------------------
*
* DrawMargins --
*
* Draws the exterior region of the graph (axes, ticks, titles, etc)
* onto a pixmap. The interior region is defined by the given rectangle
* structure.
*
* ---------------------------------
* | |
* | rectArr[0] |
* | |
* ---------------------------------
* | |top right| |
* | | | |
* | | | |
* | [1] | | [2] |
* | | | |
* | | | |
* | | | |
* | | | |
* | | | |
* | |left bottom| |
* ---------------------------------
* | |
* | rectArr[3] |
* | |
* ---------------------------------
*
* X coordinate axis
* Y coordinate axis
* legend
* interior border
* exterior border
* titles (X and Y axis, graph)
*
* Returns:
* None.
*
* Side Effects:
* Exterior of graph is displayed in its window.
*
*---------------------------------------------------------------------------
*/
static void
DrawMargins(Graph *graphPtr, Drawable drawable)
{
XRectangle rects[4];
int site;
/*
* Draw the four outer rectangles which encompass the plotting
* surface. This clears the surrounding area and clips the plot.
*/
rects[0].x = rects[0].y = rects[3].x = rects[1].x = 0;
rects[0].width = rects[3].width = (short int)graphPtr->width;
rects[0].height = (short int)graphPtr->top;
rects[3].y = graphPtr->bottom;
rects[3].height = graphPtr->height - graphPtr->bottom;
rects[2].y = rects[1].y = graphPtr->top;
rects[1].width = graphPtr->left;
rects[2].height = rects[1].height = graphPtr->bottom - graphPtr->top;
rects[2].x = graphPtr->right;
rects[2].width = graphPtr->width - graphPtr->right;
Blt_FillBackgroundRectangle(graphPtr->tkwin, drawable, graphPtr->normalBg,
rects[0].x, rects[0].y, rects[0].width, rects[0].height,
0, TK_RELIEF_FLAT);
Blt_FillBackgroundRectangle(graphPtr->tkwin, drawable, graphPtr->normalBg,
rects[1].x, rects[1].y, rects[1].width, rects[1].height,
0, TK_RELIEF_FLAT);
Blt_FillBackgroundRectangle(graphPtr->tkwin, drawable, graphPtr->normalBg,
rects[2].x, rects[2].y, rects[2].width, rects[2].height,
0, TK_RELIEF_FLAT);
Blt_FillBackgroundRectangle(graphPtr->tkwin, drawable, graphPtr->normalBg,
rects[3].x, rects[3].y, rects[3].width, rects[3].height,
0, TK_RELIEF_FLAT);
/* Draw 3D border around the plotting area */
if (graphPtr->plotBW > 0) {
int x, y, w, h;
x = graphPtr->left - graphPtr->plotBW;
y = graphPtr->top - graphPtr->plotBW;
w = (graphPtr->right - graphPtr->left) + (2*graphPtr->plotBW);
h = (graphPtr->bottom - graphPtr->top) + (2*graphPtr->plotBW);
Blt_DrawBackgroundRectangle(graphPtr->tkwin, drawable,
graphPtr->normalBg, x, y, w, h, graphPtr->plotBW,
graphPtr->plotRelief);
}
site = Blt_Legend_Site(graphPtr);
if (site & LEGEND_MARGIN_MASK) {
/* Legend is drawn on one of the graph margins */
Blt_DrawLegend(graphPtr, drawable);
} else if (site == LEGEND_WINDOW) {
Blt_Legend_EventuallyRedraw(graphPtr);
}
if (graphPtr->title != NULL) {
Blt_DrawText(graphPtr->tkwin, drawable, graphPtr->title,
&graphPtr->titleTextStyle, graphPtr->titleX, graphPtr->titleY);
}
Blt_DrawAxes(graphPtr, drawable);
graphPtr->flags &= ~DRAW_MARGINS;
}
/*
*---------------------------------------------------------------------------
*
* DrawPlot --
*
* Draws the contents of the plotting area. This consists of the
* elements, markers (draw under elements), axis limits, and possibly the
* legend. Typically, the output will be cached into a backing store
* pixmap, so that redraws can occur quickly.
*
* Results:
* None.
*
*---------------------------------------------------------------------------
*/
static void
DrawPlot(Graph *graphPtr, Drawable drawable)
{
int site;
DrawMargins(graphPtr, drawable);
/* Draw the background of the plotting area with 3D border. */
Blt_FillBackgroundRectangle(graphPtr->tkwin, drawable, graphPtr->plotBg,
graphPtr->left - graphPtr->plotBW,
graphPtr->top - graphPtr->plotBW,
graphPtr->right - graphPtr->left + 1 + 2 * graphPtr->plotBW,
graphPtr->bottom - graphPtr->top + 1 + 2 * graphPtr->plotBW,
graphPtr->plotBW, graphPtr->plotRelief);
/* Draw the elements, markers, legend, and axis limits. */
Blt_DrawAxes(graphPtr, drawable);
Blt_DrawGrids(graphPtr, drawable);
Blt_DrawMarkers(graphPtr, drawable, MARKER_UNDER);
site = Blt_Legend_Site(graphPtr);
if ((site & LEGEND_PLOTAREA_MASK) && (!Blt_Legend_IsRaised(graphPtr))) {
Blt_DrawLegend(graphPtr, drawable);
} else if (site == LEGEND_WINDOW) {
Blt_Legend_EventuallyRedraw(graphPtr);
}
Blt_DrawAxisLimits(graphPtr, drawable);
Blt_DrawElements(graphPtr, drawable);
/* Blt_DrawAxes(graphPtr, drawable); */
}
void
Blt_MapGraph(Graph *graphPtr)
{
if (graphPtr->flags & RESET_AXES) {
Blt_ResetAxes(graphPtr);
}
if (graphPtr->flags & LAYOUT_NEEDED) {
Blt_LayoutGraph(graphPtr);
graphPtr->flags &= ~LAYOUT_NEEDED;
}
/* Compute coordinate transformations for graph components */
if ((graphPtr->vRange > 1) && (graphPtr->hRange > 1)) {
if (graphPtr->flags & MAP_WORLD) {
Blt_MapAxes(graphPtr);
}
Blt_MapElements(graphPtr);
Blt_MapMarkers(graphPtr);
graphPtr->flags &= ~(MAP_ALL);
}
}
void
Blt_DrawGraph(Graph *graphPtr, Drawable drawable)
{
DrawPlot(graphPtr, drawable);
/* Draw markers above elements */
Blt_DrawMarkers(graphPtr, drawable, MARKER_ABOVE);
Blt_DrawActiveElements(graphPtr, drawable);
/* Don't draw legend in the plot area. */
if ((Blt_Legend_Site(graphPtr) & LEGEND_PLOTAREA_MASK) &&
(Blt_Legend_IsRaised(graphPtr))) {
Blt_DrawLegend(graphPtr, drawable);
}
/* Draw 3D border just inside of the focus highlight ring. */
if ((graphPtr->borderWidth > 0) && (graphPtr->relief != TK_RELIEF_FLAT)) {
Blt_DrawBackgroundRectangle(graphPtr->tkwin, drawable,
graphPtr->normalBg, graphPtr->highlightWidth,
graphPtr->highlightWidth,
graphPtr->width - 2 * graphPtr->highlightWidth,
graphPtr->height - 2 * graphPtr->highlightWidth,
graphPtr->borderWidth, graphPtr->relief);
}
/* Draw focus highlight ring. */
if ((graphPtr->highlightWidth > 0) && (graphPtr->flags & FOCUS)) {
GC gc;
gc = Tk_GCForColor(graphPtr->highlightColor, drawable);
Tk_DrawFocusHighlight(graphPtr->tkwin, gc, graphPtr->highlightWidth,
drawable);
}
}
static void
UpdateMarginTraces(Graph *graphPtr)
{
Margin *marginPtr, *endPtr;
for (marginPtr = graphPtr->margins, endPtr = marginPtr + 4;
marginPtr < endPtr; marginPtr++) {
if (marginPtr->varName != NULL) { /* Trigger variable traces */
int size;
if ((marginPtr->site == MARGIN_LEFT) ||
(marginPtr->site == MARGIN_RIGHT)) {
size = marginPtr->width;
} else {
size = marginPtr->height;
}
Tcl_SetVar(graphPtr->interp, marginPtr->varName, Blt_Itoa(size),
TCL_GLOBAL_ONLY);
}
}
}
/*
*---------------------------------------------------------------------------
*
* DisplayGraph --
*
* This procedure is invoked to display a graph widget.
*
* Results:
* None.
*
* Side effects:
* Commands are output to X to display the graph in its current mode.
*
*---------------------------------------------------------------------------
*/
static void
DisplayGraph(ClientData clientData)
{
Graph *graphPtr = clientData;
Pixmap drawable;
Tk_Window tkwin;
int site;
graphPtr->flags &= ~REDRAW_PENDING;
if (graphPtr->tkwin == NULL) {
return; /* Window has been destroyed (we
* should not get here) */
}
tkwin = graphPtr->tkwin;
if ((Tk_Width(tkwin) <= 1) || (Tk_Height(tkwin) <= 1)) {
/* Don't bother computing the layout until the size of the window is
* something reasonable. */
return;
}
graphPtr->width = Tk_Width(tkwin);
graphPtr->height = Tk_Height(tkwin);
Blt_MapGraph(graphPtr);
if (!Tk_IsMapped(tkwin)) {
/* The graph's window isn't displayed, so don't bother drawing
* anything. By getting this far, we've at least computed the
* coordinates of the graph's new layout. */
return;
}
/* Create a pixmap the size of the window for double buffering. */
if (graphPtr->doubleBuffer) {
drawable = Tk_GetPixmap(graphPtr->display, Tk_WindowId(tkwin),
graphPtr->width, graphPtr->height, Tk_Depth(tkwin));
} else {
drawable = Tk_WindowId(tkwin);
}
if (graphPtr->backingStore) {
if ((graphPtr->cache == None) ||
(graphPtr->cacheWidth != graphPtr->width) ||
(graphPtr->cacheHeight != graphPtr->height)) {
if (graphPtr->cache != None) {
Tk_FreePixmap(graphPtr->display, graphPtr->cache);
}
graphPtr->cache = Tk_GetPixmap(graphPtr->display,
Tk_WindowId(tkwin), graphPtr->width, graphPtr->height,
Tk_Depth(tkwin));
graphPtr->cacheWidth = graphPtr->width;
graphPtr->cacheHeight = graphPtr->height;
graphPtr->flags |= CACHE_DIRTY;
}
}
if (graphPtr->backingStore) {
if (graphPtr->flags & CACHE_DIRTY) {
/* The backing store is new or out-of-date. */
DrawPlot(graphPtr, graphPtr->cache);
graphPtr->flags &= ~CACHE_DIRTY;
}
/* Copy the pixmap to the one used for drawing the entire graph. */
XCopyArea(graphPtr->display, graphPtr->cache, drawable,
graphPtr->drawGC, 0, 0, Tk_Width(graphPtr->tkwin),
Tk_Height(graphPtr->tkwin), 0, 0);
} else {
DrawPlot(graphPtr, drawable);
}
/* Draw markers above elements */
Blt_DrawMarkers(graphPtr, drawable, MARKER_ABOVE);
Blt_DrawActiveElements(graphPtr, drawable);
/* Don't draw legend in the plot area. */
site = Blt_Legend_Site(graphPtr);
if ((site & LEGEND_PLOTAREA_MASK) && (Blt_Legend_IsRaised(graphPtr))) {
Blt_DrawLegend(graphPtr, drawable);
}
if (site == LEGEND_WINDOW) {
Blt_Legend_EventuallyRedraw(graphPtr);
}
/* Draw 3D border just inside of the focus highlight ring. */
if ((graphPtr->borderWidth > 0) && (graphPtr->relief != TK_RELIEF_FLAT)) {
Blt_DrawBackgroundRectangle(graphPtr->tkwin, drawable,
graphPtr->normalBg, graphPtr->highlightWidth,
graphPtr->highlightWidth,
graphPtr->width - 2 * graphPtr->highlightWidth,
graphPtr->height - 2 * graphPtr->highlightWidth,
graphPtr->borderWidth, graphPtr->relief);
}
/* Draw focus highlight ring. */
if ((graphPtr->highlightWidth > 0) && (graphPtr->flags & FOCUS)) {
GC gc;
gc = Tk_GCForColor(graphPtr->highlightColor, drawable);
Tk_DrawFocusHighlight(graphPtr->tkwin, gc, graphPtr->highlightWidth,
drawable);
}
/* Disable crosshairs before redisplaying to the screen */
Blt_DisableCrosshairs(graphPtr);
XCopyArea(graphPtr->display, drawable, Tk_WindowId(tkwin),
graphPtr->drawGC, 0, 0, graphPtr->width, graphPtr->height, 0, 0);
Blt_EnableCrosshairs(graphPtr);
if (graphPtr->doubleBuffer) {
Tk_FreePixmap(graphPtr->display, drawable);
}
graphPtr->flags &= ~RESET_WORLD;
UpdateMarginTraces(graphPtr);
}
/*LINTLIBRARY*/
int
Blt_GraphCmdInitProc(Tcl_Interp *interp)
{
static Blt_InitCmdSpec cmdSpecs[] = {
{"graph", GraphCmd,},
{"barchart", BarchartCmd,},
};
return Blt_InitCmds(interp, "::blt", cmdSpecs, 2);
}
Graph *
Blt_GetGraphFromWindowData(Tk_Window tkwin)
{
Graph *graphPtr;
while (tkwin != NULL) {
graphPtr = (Graph *)Blt_GetWindowInstanceData(tkwin);
if (graphPtr != NULL) {
return graphPtr;
}
tkwin = Tk_Parent(tkwin);
}
return NULL;
}
int
Blt_GraphType(Graph *graphPtr)
{
switch (graphPtr->classId) {
case CID_ELEM_LINE:
return GRAPH;
case CID_ELEM_BAR:
return BARCHART;
default:
return 0;
}
return 0;
}
/*
*---------------------------------------------------------------------------
*
* Blt_ReconfigureGraph --
*
* Allocates resources for the graph.
*
*---------------------------------------------------------------------------
*/
void
Blt_ReconfigureGraph(Graph *graphPtr)
{
ConfigureGraph(graphPtr);
Blt_ConfigureLegend(graphPtr);
Blt_ConfigureElements(graphPtr);
Blt_ConfigureAxes(graphPtr);
Blt_ConfigureMarkers(graphPtr);
}
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