114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
/*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#include "ImGuiPlotTwoLines.hpp"
|
|
|
|
#include <imgui.h>
|
|
#include <imgui_internal.h>
|
|
|
|
namespace ImGui
|
|
{
|
|
namespace
|
|
{
|
|
void RenderLine(ImDrawList* drawList, float (*getter)(void* data, int idx), void* data, int valuesCount, float scaleMin, float scaleMax, ImRect innerBb, ImColor color, int resW)
|
|
{
|
|
const float tStep = 1.0f / (float)resW;
|
|
const float invScale = (scaleMin == scaleMax) ? 0.0f : (1.0f / (scaleMax - scaleMin));
|
|
|
|
float v0 = getter(data, 0);
|
|
float t0 = 0.0f;
|
|
ImVec2 tp0 = ImVec2(t0, 1.0f - ImSaturate((v0 - scaleMin) * invScale));
|
|
|
|
for (int n = 0; n < resW; n++)
|
|
{
|
|
const float t1 = t0 + tStep;
|
|
const int v1Idx = (int)(t0 * (valuesCount - 1) + 0.5f);
|
|
IM_ASSERT(v1Idx >= 0 && v1Idx < valuesCount);
|
|
const float v1 = getter(data, ImMin(v1Idx + 1, valuesCount - 1));
|
|
const ImVec2 tp1 = ImVec2( t1, 1.0f - ImSaturate((v1 - scaleMin) * invScale) );
|
|
|
|
ImVec2 pos0 = ImLerp(innerBb.Min, innerBb.Max, tp0);
|
|
ImVec2 pos1 = ImLerp(innerBb.Min, innerBb.Max, tp1);
|
|
|
|
drawList->AddLine(pos0, pos1, color);
|
|
|
|
t0 = t1;
|
|
tp0 = tp1;
|
|
}
|
|
}
|
|
}
|
|
|
|
void PlotTwoLines(const char* label,
|
|
float (*getter1)(void* data, int idx), void* data1, const char *tooltip1,
|
|
float (*getter2)(void* data, int idx), void* data2, const char *tooltip2,
|
|
int valuesCount, float scaleMin, float scaleMax, ImVec2 graphSize, ImColor color1, ImColor color2)
|
|
{
|
|
ImGuiWindow* window = GetCurrentWindow();
|
|
if (window->SkipItems)
|
|
return;
|
|
|
|
const ImGuiStyle& style = ImGui::GetCurrentContext()->Style;
|
|
const ImGuiID id = window->GetID(label);
|
|
|
|
const ImVec2 labelSize = CalcTextSize(label, NULL, true);
|
|
const ImVec2 frameSize = CalcItemSize(graphSize, CalcItemWidth(), labelSize.y + style.FramePadding.y * 2.0f);
|
|
|
|
const ImRect frameBb(window->DC.CursorPos, ImVec2(window->DC.CursorPos.x + frameSize.x, window->DC.CursorPos.y + frameSize.y));
|
|
const ImRect innerBb(ImVec2(frameBb.Min.x + style.FramePadding.x, frameBb.Min.y + style.FramePadding.y), ImVec2(frameBb.Max.x - style.FramePadding.x, frameBb.Max.y - style.FramePadding.y));
|
|
const ImRect totalBb(frameBb.Min, ImVec2(frameBb.Max.x + (labelSize.x > 0.0f ? (style.ItemInnerSpacing.x + labelSize.x) : 0.0f), frameBb.Max.y));
|
|
|
|
ItemSize(totalBb, style.FramePadding.y);
|
|
if (!ItemAdd(totalBb, 0, &frameBb))
|
|
return;
|
|
const bool hovered = ItemHoverable(frameBb, id, ImGui::GetCurrentContext()->LastItemData.InFlags);
|
|
|
|
// Determine scale from values if not specified
|
|
if(scaleMin == FLT_MAX || scaleMax == FLT_MAX)
|
|
{
|
|
float vMin = FLT_MAX;
|
|
float vMax = -FLT_MAX;
|
|
for(int i = 0; i < valuesCount; i++)
|
|
{
|
|
const float v1 = getter1(data1, i);
|
|
const float v2 = getter2(data2, i);
|
|
if(v1 != v1 || v2 != v2) // Ignore NaN values
|
|
continue;
|
|
vMin = ImMin(ImMin(vMin, v1), v2);
|
|
vMax = ImMax(ImMax(vMax, v1), v2);
|
|
}
|
|
if(scaleMin == FLT_MAX)
|
|
scaleMin = vMin;
|
|
if(scaleMax == FLT_MAX)
|
|
scaleMax = vMax;
|
|
}
|
|
|
|
RenderFrame(frameBb.Min, frameBb.Max, GetColorU32(ImGuiCol_FrameBg), true, style.FrameRounding);
|
|
|
|
if(valuesCount >= 2)
|
|
{
|
|
int resW = ImMin((int)frameSize.x, valuesCount) - 1;
|
|
int itemCount = valuesCount - 1;
|
|
|
|
// Tooltip on hover
|
|
if(hovered && innerBb.Contains(ImGui::GetCurrentContext()->IO.MousePos))
|
|
{
|
|
const float t = ImClamp((ImGui::GetCurrentContext()->IO.MousePos.x - innerBb.Min.x) / (innerBb.Max.x - innerBb.Min.x), 0.0f, 0.9999f);
|
|
const int vIdx = (int)(t * itemCount);
|
|
IM_ASSERT(vIdx >= 0 && vIdx < valuesCount);
|
|
|
|
const float v0 = getter1(data1, vIdx % valuesCount);
|
|
const float v1 = getter2(data2, (vIdx + 1) % valuesCount);
|
|
SetTooltip("%s: %8.4g\n%s: %8.4g", tooltip1, v0, tooltip2, v1);
|
|
}
|
|
|
|
RenderLine(window->DrawList, getter1, data1, valuesCount, scaleMin, scaleMax, innerBb, color1, resW);
|
|
RenderLine(window->DrawList, getter2, data2, valuesCount, scaleMin, scaleMax, innerBb, color2, resW);
|
|
}
|
|
|
|
if(labelSize.x > 0.0f)
|
|
RenderText(ImVec2(frameBb.Max.x + style.ItemInnerSpacing.x, innerBb.Min.y), label);
|
|
}
|
|
} |