gwm17/implot
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improve mouse pos label precision

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This commit is contained in:
Evan Pezent 2020-06-15 21:00:42 -05:00
parent fcbbc6c735
commit 70a044ee17
2 changed files with 27 additions and 27 deletions
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52
implot.cpp
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@ -213,14 +213,19 @@ inline bool NanOrInf(double val) {
}
// Computes order of magnitude of double.
// inline int OrderOfMagnitude(double val) {
// return val == 0 ? 0 : (int)(floor(log10(fabs(val))));
// }
inline int OrderOfMagnitude(double val) {
return val == 0 ? 0 : (int)(floor(log10(fabs(val))));
}
// Returns the precision required for a order of magnitude.
// inline int OrderToPrecision(int order) {
// return order > 0 ? 0 : 1 - order;
// }
inline int OrderToPrecision(int order) {
return order > 0 ? 0 : 1 - order;
}
// Returns a floating point precision to use given a value
inline int Precision(double val) {
return OrderToPrecision(OrderOfMagnitude(val));
}
// Draws vertical text. The position is the bottom left of the text rect.
inline void AddTextVertical(ImDrawList *DrawList, const char *text, ImVec2 pos, ImU32 text_color) {
@ -290,14 +295,10 @@ struct ImPlotAxis {
Dragging = false;
Range.Min = 0;
Range.Max = 1;
Divisions = 3;
Subdivisions = 10;
Flags = PreviousFlags = ImPlotAxisFlags_Default;
}
bool Dragging;
ImPlotRange Range;
int Divisions;
int Subdivisions;
ImPlotAxisFlags Flags, PreviousFlags;
};
@ -908,15 +909,10 @@ bool BeginPlot(const char* title, const char* x_label, const char* y_label, cons
}
// adaptive divisions
plot.XAxis.Divisions = (int)IM_ROUND(0.003 * gp.BB_Canvas.GetWidth());
if (plot.XAxis.Divisions < 2)
plot.XAxis.Divisions = 2;
int x_divisions = ImMax(2, (int)IM_ROUND(0.003 * gp.BB_Canvas.GetWidth()));
int y_divisions[MAX_Y_AXES];
for (int i = 0; i < MAX_Y_AXES; i++) {
plot.YAxis[i].Divisions = (int)IM_ROUND(0.003 * gp.BB_Canvas.GetHeight());
if (plot.YAxis[i].Divisions < 2)
plot.YAxis[i].Divisions = 2;
y_divisions[i] = ImMax(2, (int)IM_ROUND(0.003 * gp.BB_Canvas.GetHeight()));
}
// COLORS -----------------------------------------------------------------
@ -955,21 +951,20 @@ bool BeginPlot(const char* title, const char* x_label, const char* y_label, cons
gp.RenderX = (HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_GridLines) ||
HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_TickMarks) ||
HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_TickLabels)) && plot.XAxis.Divisions > 1;
HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_TickLabels)) && x_divisions > 1;
for (int i = 0; i < MAX_Y_AXES; i++) {
gp.RenderY[i] =
gp.Y[i].Present &&
(HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_GridLines) ||
HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_TickMarks) ||
HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_TickLabels)) && plot.YAxis[i].Divisions > 1;
HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_TickLabels)) && y_divisions[i] > 1;
}
// get ticks
if (gp.RenderX && gp.NextPlotData.ShowDefaultTicksX)
AddDefaultTicks(plot.XAxis.Range, plot.XAxis.Divisions, plot.XAxis.Subdivisions, HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_LogScale), gp.XTicks);
AddDefaultTicks(plot.XAxis.Range, x_divisions, 10, HasFlag(plot.XAxis.Flags, ImPlotAxisFlags_LogScale), gp.XTicks);
for (int i = 0; i < MAX_Y_AXES; i++) {
if (gp.RenderY[i] && gp.NextPlotData.ShowDefaultTicksY[i]) {
AddDefaultTicks(plot.YAxis[i].Range, plot.YAxis[i].Divisions, plot.YAxis[i].Subdivisions, HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_LogScale), gp.YTicks[i]);
AddDefaultTicks(plot.YAxis[i].Range, y_divisions[i], 10, HasFlag(plot.YAxis[i].Flags, ImPlotAxisFlags_LogScale), gp.YTicks[i]);
}
}
@ -1724,12 +1719,17 @@ void EndPlot() {
char buffer[128] = {};
BufferWriter writer(buffer, sizeof(buffer));
writer.Write("%.2f,%.2f", gp.LastMousePos[0].x, gp.LastMousePos[0].y);
double range_x = gp.XTicks.Size > 1 ? (gp.XTicks[1].PlotPos - gp.XTicks[0].PlotPos) : plot.XAxis.Range.Size();
double range_y = gp.YTicks[0].Size > 1 ? (gp.YTicks[0][1].PlotPos - gp.YTicks[0][0].PlotPos) : plot.YAxis[0].Range.Size();
writer.Write("%.*f,%.*f", Precision(range_x), gp.LastMousePos[0].x, Precision(range_y), gp.LastMousePos[0].y);
if (HasFlag(plot.Flags, ImPlotFlags_YAxis2)) {
writer.Write(",(%.2f)", gp.LastMousePos[1].y);
range_y = gp.YTicks[1].Size > 1 ? (gp.YTicks[1][1].PlotPos - gp.YTicks[1][0].PlotPos) : plot.YAxis[1].Range.Size();
writer.Write(",(%.*f)", Precision(range_y), gp.LastMousePos[1].y);
}
if (HasFlag(plot.Flags, ImPlotFlags_YAxis3)) {
writer.Write(",(%.2f)", gp.LastMousePos[2].y);
range_y = gp.YTicks[2].Size > 1 ? (gp.YTicks[2][1].PlotPos - gp.YTicks[2][0].PlotPos) : plot.YAxis[2].Range.Size();
writer.Write(",(%.*f)", Precision(range_y), gp.LastMousePos[2].y);
}
ImVec2 size = ImGui::CalcTextSize(buffer);
ImVec2 pos = gp.BB_Plot.Max - size - ImVec2(5, 5);

2
implot.h
View File

@ -45,7 +45,7 @@ enum ImPlotFlags_ {
ImPlotFlags_Query = 1 << 4, // the user will be able to draw query rects with middle-mouse
ImPlotFlags_ContextMenu = 1 << 5, // the user will be able to open a context menu with double-right click
ImPlotFlags_Crosshairs = 1 << 6, // the default mouse cursor will be replaced with a crosshair when hovered
ImPlotFlags_AntiAliased = 1 << 7, // lines and fills will be anti-aliased (not recommended)
ImPlotFlags_AntiAliased = 1 << 7, // plot lines will be software anti-aliased (not recommended, prefer MSAA)
ImPlotFlags_NoChild = 1 << 8, // a child window region will not be used to capture mouse scroll (can boost performance for single ImGui window applications)
ImPlotFlags_YAxis2 = 1 << 9, // enable a 2nd y-axis
ImPlotFlags_YAxis3 = 1 << 10, // enable a 3rd y-axis