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diff --git a/src/Fl_Chart.cxx b/src/Fl_Chart.cxx
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+// Fl_Chart.C
+
+// Emulation of the Forms Chart widget.
+// I did not try to improve this much, as I doubt it is used.
+
+// display code Written by: Mark Overmars
+
+#include <FL/math.h>
+#include <FL/Fl.H>
+#include <FL/Fl_Chart.H>
+#include <FL/fl_draw.H>
+#include <string.h>
+
+#define ARCINC (2.0*M_PI/360.0)
+
+// this function is in fl_boxtype.C:
+void fl_rectbound(int x,int y,int w,int h, Fl_Color color);
+
+/* Widget specific information */
+
+static void draw_barchart(int x,int y,int w,int h,
+ int numb, FL_CHART_ENTRY entries[],
+ double min, double max, int autosize, int maxnumb,
+ Fl_Color textcolor)
+/* Draws a bar chart. x,y,w,h is the bounding box, entries the array of
+ numb entries and min and max the boundaries. */
+{
+ double incr = h/(max-min);
+ int zeroh;
+ double lh = fl_height();
+ if ( -min*incr < lh) {
+ incr = (h - lh + min*incr)/(max-min);
+ zeroh = int(y+h-lh);
+ } else {
+ zeroh = int(y+h+min * incr + .5);
+ }
+ int bwidth = int(w/double(autosize?numb:maxnumb)+.5);
+ /* Draw base line */
+ fl_color(textcolor);
+ fl_line(x, zeroh, x+w, zeroh);
+ if (min == 0.0 && max == 0.0) return; /* Nothing else to draw */
+ int i;
+ /* Draw the bars */
+ for (i=0; i<numb; i++) {
+ int h = int(entries[i].val*incr+.5);
+ if (h < 0)
+ fl_rectbound(x+i*bwidth,zeroh,bwidth+1,-h+1, (Fl_Color)entries[i].col);
+ else if (h > 0)
+ fl_rectbound(x+i*bwidth,zeroh-h,bwidth+1,h+1,(Fl_Color)entries[i].col);
+ }
+ /* Draw the labels */
+ fl_color(textcolor);
+ for (i=0; i<numb; i++)
+ fl_draw(entries[i].str,
+ x+i*bwidth+bwidth/2,zeroh,0,0,
+ FL_ALIGN_TOP);
+}
+
+static void draw_horbarchart(int x,int y,int w,int h,
+ int numb, FL_CHART_ENTRY entries[],
+ double min, double max, int autosize, int maxnumb,
+ Fl_Color textcolor)
+/* Draws a horizontal bar chart. x,y,w,h is the bounding box, entries the
+ array of numb entries and min and max the boundaries. */
+{
+ int i;
+ double lw = 0.0; /* Maximal label width */
+ /* Compute maximal label width */
+ for (i=0; i<numb; i++) {
+ double w1 = fl_width(entries[i].str);
+ if (w1 > lw) lw = w1;
+ }
+ if (lw > 0.0) lw += 4.0;
+ double incr = w/(max-min);
+ int zeroh;
+ if ( -min*incr < lw) {
+ incr = (w - lw + min*incr)/(max-min);
+ zeroh = x+int(lw+.5);
+ } else {
+ zeroh = int(x-min * incr + .5);
+ }
+ int bwidth = int(h/double(autosize?numb:maxnumb)+.5);
+ /* Draw base line */
+ fl_color(textcolor);
+ fl_line(zeroh, y, zeroh, y+h);
+ if (min == 0.0 && max == 0.0) return; /* Nothing else to draw */
+ /* Draw the bars */
+ for (i=0; i<numb; i++) {
+ int w = int(entries[i].val*incr+.5);
+ if (w > 0)
+ fl_rectbound(zeroh,y+i*bwidth,w+1,bwidth+1, (Fl_Color)entries[i].col);
+ else if (w < 0)
+ fl_rectbound(zeroh+w,y+i*bwidth,-w+1,bwidth+1,(Fl_Color)entries[i].col);
+ }
+ /* Draw the labels */
+ for (i=0; i<numb; i++)
+ fl_draw(entries[i].str,
+ zeroh-2,y+i*bwidth+bwidth/2,0,0,
+ FL_ALIGN_RIGHT);
+}
+
+static void draw_linechart(int type, int x,int y,int w,int h,
+ int numb, FL_CHART_ENTRY entries[],
+ double min, double max, int autosize, int maxnumb,
+ Fl_Color textcolor)
+/* Draws a line chart. x,y,w,h is the bounding box, entries the array of
+ numb entries and min and max the boundaries. */
+{
+ int i;
+ double lh = fl_height();
+ double incr = (h-2.0*lh)/ (max-min);
+ int zeroh = int(y+h-lh+min * incr + .5);
+ double bwidth = w/double(autosize?numb:maxnumb);
+ /* Draw the values */
+ for (i=0; i<numb; i++) {
+ int x0 = x + int((i-.5)*bwidth+.5);
+ int x1 = x + int((i+.5)*bwidth+.5);
+ int y0 = i ? zeroh - int(entries[i-1].val*incr+.5) : 0;
+ int y1 = zeroh - int(entries[i].val*incr+.5);
+ if (type == FL_SPIKE_CHART) {
+ fl_color((Fl_Color)entries[i].col);
+ fl_line(x1, zeroh, x1, y1);
+ } else if (type == FL_LINE_CHART && i != 0) {
+ fl_color((Fl_Color)entries[i-1].col);
+ fl_line(x0,y0,x1,y1);
+ } else if (type == FL_FILLED_CHART && i != 0) {
+ fl_color((Fl_Color)entries[i-1].col);
+ if ((entries[i-1].val>0.0)!=(entries[i].val>0.0)) {
+ double ttt = entries[i-1].val/(entries[i-1].val-entries[i].val);
+ int xt = x + int((i-.5+ttt)*bwidth+.5);
+ fl_polygon(x0,zeroh, x0,y0, xt,zeroh);
+ fl_polygon(xt,zeroh, x1,y1, x1,zeroh);
+ } else {
+ fl_polygon(x0,zeroh, x0,y0, x1,y1, x1,zeroh);
+ }
+ fl_color(textcolor);
+ fl_line(x0,y0,x1,y1);
+ }
+ }
+ /* Draw base line */
+ fl_color(textcolor);
+ fl_line(x,zeroh,x+w,zeroh);
+ /* Draw the labels */
+ for (i=0; i<numb; i++)
+ fl_draw(entries[i].str,
+ x+int((i+.5)*bwidth+.5), zeroh - int(entries[i].val*incr+.5),0,0,
+ entries[i].val>=0 ? FL_ALIGN_BOTTOM : FL_ALIGN_TOP);
+}
+
+static void draw_piechart(int x,int y,int w,int h,
+ int numb, FL_CHART_ENTRY entries[], int special,
+ Fl_Color textcolor)
+/* Draws a pie chart. x,y,w,h is the bounding box, entries the array of
+ numb entries */
+{
+ int i;
+ double xc,yc,rad; /* center and radius */
+ double tot; /* sum of values */
+ double incr; /* increment in angle */
+ double curang; /* current angle we are drawing */
+ double txc,tyc; /* temporary center */
+ double lh = fl_height();
+ /* compute center and radius */
+ xc = x+w/2.0; yc = y+h/2.0;
+ rad = h/2.0 - lh;
+ if (special) { yc += 0.1*rad; rad = 0.9*rad;}
+ /* compute sum of values */
+ tot = 0.0;
+ for (i=0; i<numb; i++)
+ if (entries[i].val > 0.0) tot += entries[i].val;
+ if (tot == 0.0) return;
+ incr = 360.0/tot;
+ /* Draw the pie */
+ curang = 0.0;
+ for (i=0; i<numb; i++)
+ if (entries[i].val > 0.0)
+ {
+ txc = xc; tyc = yc;
+ /* Correct for special pies */
+ if (special && i==0)
+ {
+ txc += 0.3*rad*cos(ARCINC*(curang+0.5*incr*entries[i].val));
+ tyc -= 0.3*rad*sin(ARCINC*(curang+0.5*incr*entries[i].val));
+ }
+ fl_color((Fl_Color)entries[i].col);
+ fl_begin_polygon(); fl_vertex(txc,tyc);
+ fl_arc(txc,tyc,rad,curang, curang+incr*entries[i].val);
+ fl_end_polygon();
+ fl_color(textcolor);
+ fl_begin_loop(); fl_vertex(txc,tyc);
+ fl_arc(txc,tyc,rad,curang, curang+incr*entries[i].val);
+ fl_end_loop();
+ curang += 0.5 * incr * entries[i].val;
+ /* draw the label */
+ double xl = txc + 1.1*rad*cos(ARCINC*curang);
+ fl_draw(entries[i].str,
+ int(xl+.5),
+ int(tyc - 1.1*rad*sin(ARCINC*curang)+.5),
+ 0, 0,
+ xl<txc ? FL_ALIGN_RIGHT : FL_ALIGN_LEFT);
+ curang += 0.5 * incr * entries[i].val;
+ }
+}
+
+void Fl_Chart::draw() {
+ int xx,yy,ww,hh;
+ int i;
+
+ xx = x()+9;
+ yy = y()+9;
+ ww = w()-2*9;
+ hh = h()-2*9;
+
+ if (min >= max) {
+ min = max = 0.0;
+ for (i=0; i<numb; i++) {
+ if (entries[i].val < min) min = entries[i].val;
+ if (entries[i].val > max) max = entries[i].val;
+ }
+ }
+
+ draw_box();
+ fl_font(textfont(),textsize());
+
+ switch (type()) {
+ case FL_BAR_CHART:
+ draw_barchart(xx,yy,ww,hh, numb, entries, min, max,
+ autosize(), maxnumb, textcolor());
+ break;
+ case FL_HORBAR_CHART:
+ draw_horbarchart(xx,yy,ww,hh, numb, entries, min, max,
+ autosize(), maxnumb, textcolor());
+ break;
+ case FL_PIE_CHART:
+ draw_piechart(xx,yy,ww,hh,numb,entries,0, textcolor());
+ break;
+ case FL_SPECIALPIE_CHART:
+ draw_piechart(xx,yy,ww,hh,numb,entries,1,textcolor());
+ break;
+ default:
+ draw_linechart(type(),xx,yy,ww,hh, numb, entries, min, max,
+ autosize(), maxnumb, textcolor());
+ break;
+ }
+ draw_label();
+}
+
+/*------------------------------*/
+
+#define FL_CHART_BOXTYPE FL_BORDER_BOX
+#define FL_CHART_COL1 FL_COL1
+#define FL_CHART_LCOL FL_LCOL
+#define FL_CHART_ALIGN FL_ALIGN_BOTTOM
+
+Fl_Chart::Fl_Chart(int x,int y,int w,int h,const char *l) :
+Fl_Widget(x,y,w,h,l) {
+ box(FL_BORDER_BOX);
+ align(FL_ALIGN_BOTTOM);
+ numb = 0;
+ maxnumb = FL_CHART_MAX;
+ autosize_ = 1;
+ min = max = 0;
+ textfont_ = FL_HELVETICA;
+ textsize_ = 10;
+ textcolor_ = FL_BLACK;
+}
+
+void Fl_Chart::clear() {
+ numb = 0;
+ redraw();
+}
+
+void Fl_Chart::add(double val, const char *str, uchar col) {
+ int i;
+ /* Shift entries if required */
+ if (numb >= maxnumb) {
+ for (i=0; i<numb-1; i++) entries[i] = entries[i+1];
+ numb--;
+ }
+ entries[numb].val = float(val);
+ entries[numb].col = col;
+ if (str) {
+ strncpy(entries[numb].str,str,FL_CHART_LABEL_MAX+1);
+ entries[numb].str[FL_CHART_LABEL_MAX] = 0;
+ } else {
+ entries[numb].str[0] = 0;
+ }
+ numb++;
+ redraw();
+}
+
+void Fl_Chart::insert(int index, double val, const char *str, uchar col) {
+ int i;
+ if (index < 1 || index > numb+1) return;
+ /* Shift entries */
+ for (i=numb; i >= index; i--) entries[i] = entries[i-1];
+ if (numb < maxnumb) numb++;
+ /* Fill in the new entry */
+ entries[index-1].val = float(val);
+ entries[index-1].col = col;
+ if (str) {
+ strncpy(entries[index-1].str,str,FL_CHART_LABEL_MAX+1);
+ entries[index-1].str[FL_CHART_LABEL_MAX] = 0;
+ } else {
+ entries[index-1].str[0] = 0;
+ }
+ redraw();
+}
+
+void Fl_Chart::replace(int index,double val, const char *str, uchar col) {
+ if (index < 1 || index > numb) return;
+ entries[index-1].val = float(val);
+ entries[index-1].col = col;
+ if (str) {
+ strncpy(entries[index-1].str,str,FL_CHART_LABEL_MAX+1);
+ entries[index-1].str[FL_CHART_LABEL_MAX] = 0;
+ } else {
+ entries[index-1].str[0] = 0;
+ }
+ redraw();
+}
+
+void Fl_Chart::bounds(double min, double max) {
+ this->min = min;
+ this->max = max;
+ redraw();
+}
+
+void Fl_Chart::maxsize(int m) {
+ int i;
+ /* Fill in the new number */
+ if (m < 0) return;
+ if (m > FL_CHART_MAX)
+ maxnumb = FL_CHART_MAX;
+ else
+ maxnumb = m;
+ /* Shift entries if required */
+ if (numb > maxnumb) {
+ for (i = 0; i<maxnumb; i++)
+ entries[i] = entries[i+numb-maxnumb];
+ numb = maxnumb;
+ redraw();
+ }
+}
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