// back-end
static void
DrawHistograms ()
{
VisualizationData vd;
int i; double step = 1;
if( InitVisualization( &vd ) ) {
if( vd.hist_width < MIN_HIST_WIDTH ) {
DrawHistogramAsDiagram( vd.cy, vd.paint_width, vd.hist_count );
step = 0.5*vd.paint_width / (((vd.hist_count | 7) + 1)/2 + 1.);
}
else {
DrawHistogramFull( vd.cy, step = vd.hist_width, vd.hist_count );
}
}
if(!differentialView) return;
differentialView = 0;
DrawSegment( MarginX + MarginW, vd.cy, NULL, NULL, PEN_NONE );
for( i=0; i<vd.hist_count; i++ ) {
int index = currFirst + i;
int x = MarginX + MarginW + index * step + step/2;
DrawSegment((int) x, GetValueY( GetPvScore(index) ), NULL, NULL, PEN_ANY );
}
differentialView = 1;
}
// back-end, delete pen selection
static void
DrawHistogramFull (int cy, int hist_width, int hist_count)
{
int i;
// SelectObject( hdcPB, GetStockObject(BLACK_PEN) );
for( i=0; i<hist_count; i++ ) {
int index = currFirst + i;
int x = MarginX + MarginW + index * hist_width;
/* Draw a separator every 10 moves */
DrawSeparator( index, x );
/* Draw histogram */
if( currPvInfo[i].depth > 0 ) {
DrawHistogram( x, cy, hist_width, GetPvScore(index), index & 1 );
}
}
}
/* Actually draw histogram as a diagram, cause there's too much data */
static void
DrawHistogramAsDiagram (int cy, int paint_width, int hist_count)
{
double step;
int i;
/* Rescale the graph every few moves (as opposed to every move) */
hist_count -= hist_count % 8;
hist_count += 8;
hist_count /= 2;
step = (double) paint_width / (hist_count + 1);
for( i=0; i<2; i++ ) {
int index = currFirst;
int side = (currCurrent + i + 1) & 1; /* Draw current side last */
double x = MarginX + MarginW;
if( (index & 1) != side ) {
x += step / 2;
index++;
}
DrawSegment( (int) x, cy, NULL, NULL, PEN_NONE );
index += 2;
while( index < currLast ) {
x += step;
DrawSeparator( index, (int) x );
/* Extend line up to current point */
if( currPvInfo[index].depth > 0 ) {
DrawSegment((int) x, GetValueY( GetPvScore(index) ), NULL, NULL, (side==0 ? PEN_BOLDWHITE: PEN_BOLDBLACK) );
}
index += 2;
}
}
}
