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improve tick label culling

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This commit is contained in:
Evan Pezent 2021-07-15 20:40:51 -07:00
parent 83cb14b54a
commit 2dc2a4cfd5
1 changed files with 6 additions and 10 deletions
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16
implot.cpp
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@ -690,6 +690,9 @@ bool ShowLegendEntries(ImPlotItemGroup& items, const ImRect& legend_bb, bool hov
// Tick Utils
//-----------------------------------------------------------------------------
static const float TICK_FILL_X = 0.8f;
static const float TICK_FILL_Y = 1.0f;
void AddTicksDefault(const ImPlotRange& range, float pix, ImPlotOrientation orn, ImPlotTickCollection& ticks, const char* fmt) {
const int idx0 = ticks.Size;
const int nMinor = 10;
@ -700,12 +703,7 @@ void AddTicksDefault(const ImPlotRange& range, float pix, ImPlotOrientation orn,
const double graphmax = ceil(range.Max / interval) * interval;
bool first_major_set = false;
int first_major_idx = 0;
char dummy[32];
sprintf(dummy,fmt,-ImAbs(interval / nMinor));
ImVec2 dummy_size = ImGui::CalcTextSize(dummy);
ImVec2 total_size(0,0);
for (double major = graphmin; major < graphmax + 0.5 * interval; major += interval) {
// is this zero? combat zero formatting issues
if (major-interval < 0 && major+interval > 0)
@ -715,19 +713,17 @@ void AddTicksDefault(const ImPlotRange& range, float pix, ImPlotOrientation orn,
first_major_idx = ticks.Size;
first_major_set = true;
}
ticks.Append(major, true, true, fmt);
total_size += dummy_size;
total_size += ticks.Append(major, true, true, fmt).LabelSize;
}
for (int i = 1; i < nMinor; ++i) {
double minor = major + i * interval / nMinor;
if (range.Contains(minor)) {
ticks.Append(minor, false, true, fmt);
total_size += dummy_size;
total_size += ticks.Append(minor, false, true, fmt).LabelSize;
}
}
}
// prune if necessary
if ((orn == ImPlotOrientation_Horizontal && total_size.x > pix) || (orn == ImPlotOrientation_Vertical && total_size.y > pix)) {
if ((orn == ImPlotOrientation_Horizontal && total_size.x > pix*TICK_FILL_X) || (orn == ImPlotOrientation_Vertical && total_size.y > pix*TICK_FILL_Y)) {
for (int i = first_major_idx-1; i >= idx0; i -= 2)
ticks.Ticks[i].ShowLabel = false;
for (int i = first_major_idx+1; i < ticks.Size; i += 2)