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Plot: Internals: Added hovered index to PlotEx() function. (#2670)

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This commit is contained in:
omar 2020-04-07 12:11:06 +02:00
parent e9366b4c73
commit 4e7ceb5f90
2 changed files with 13 additions and 9 deletions
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2
imgui_internal.h
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@ -1887,7 +1887,7 @@ namespace ImGui
IMGUI_API void ColorPickerOptionsPopup(const float* ref_col, ImGuiColorEditFlags flags);
// Plot
IMGUI_API void PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size);
IMGUI_API int PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size);
// Shade functions (write over already created vertices)
IMGUI_API void ShadeVertsLinearColorGradientKeepAlpha(ImDrawList* draw_list, int vert_start_idx, int vert_end_idx, ImVec2 gradient_p0, ImVec2 gradient_p1, ImU32 col0, ImU32 col1);

20
imgui_widgets.cpp
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@ -5835,13 +5835,13 @@ bool ImGui::ListBox(const char* label, int* current_item, bool (*items_getter)(v
// - PlotHistogram()
//-------------------------------------------------------------------------
void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size)
int ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_getter)(void* data, int idx), void* data, int values_count, int values_offset, const char* overlay_text, float scale_min, float scale_max, ImVec2 frame_size)
{
ImGuiContext& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return;
return -1;
ImGuiContext& g = *GImGui;
const ImGuiStyle& style = g.Style;
const ImGuiID id = window->GetID(label);
@ -5856,7 +5856,7 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
const ImRect total_bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0));
ItemSize(total_bb, style.FramePadding.y);
if (!ItemAdd(total_bb, 0, &frame_bb))
return;
return -1;
const bool hovered = ItemHoverable(frame_bb, id);
// Determine scale from values if not specified
@ -5881,13 +5881,13 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
RenderFrame(frame_bb.Min, frame_bb.Max, GetColorU32(ImGuiCol_FrameBg), true, style.FrameRounding);
const int values_count_min = (plot_type == ImGuiPlotType_Lines) ? 2 : 1;
int idx_hovered = -1;
if (values_count >= values_count_min)
{
int res_w = ImMin((int)frame_size.x, values_count) + ((plot_type == ImGuiPlotType_Lines) ? -1 : 0);
int item_count = values_count + ((plot_type == ImGuiPlotType_Lines) ? -1 : 0);
// Tooltip on hover
int v_hovered = -1;
if (hovered && inner_bb.Contains(g.IO.MousePos))
{
const float t = ImClamp((g.IO.MousePos.x - inner_bb.Min.x) / (inner_bb.Max.x - inner_bb.Min.x), 0.0f, 0.9999f);
@ -5900,7 +5900,7 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
SetTooltip("%d: %8.4g\n%d: %8.4g", v_idx, v0, v_idx+1, v1);
else if (plot_type == ImGuiPlotType_Histogram)
SetTooltip("%d: %8.4g", v_idx, v0);
v_hovered = v_idx;
idx_hovered = v_idx;
}
const float t_step = 1.0f / (float)res_w;
@ -5927,13 +5927,13 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
ImVec2 pos1 = ImLerp(inner_bb.Min, inner_bb.Max, (plot_type == ImGuiPlotType_Lines) ? tp1 : ImVec2(tp1.x, histogram_zero_line_t));
if (plot_type == ImGuiPlotType_Lines)
{
window->DrawList->AddLine(pos0, pos1, v_hovered == v1_idx ? col_hovered : col_base);
window->DrawList->AddLine(pos0, pos1, idx_hovered == v1_idx ? col_hovered : col_base);
}
else if (plot_type == ImGuiPlotType_Histogram)
{
if (pos1.x >= pos0.x + 2.0f)
pos1.x -= 1.0f;
window->DrawList->AddRectFilled(pos0, pos1, v_hovered == v1_idx ? col_hovered : col_base);
window->DrawList->AddRectFilled(pos0, pos1, idx_hovered == v1_idx ? col_hovered : col_base);
}
t0 = t1;
@ -5947,6 +5947,10 @@ void ImGui::PlotEx(ImGuiPlotType plot_type, const char* label, float (*values_ge
if (label_size.x > 0.0f)
RenderText(ImVec2(frame_bb.Max.x + style.ItemInnerSpacing.x, inner_bb.Min.y), label);
// Return hovered index or -1 if none are hovered.
// This is currently not exposed in the public API because we need a larger redesign of the whole thing, but in the short-term we are making it available in PlotEx().
return idx_hovered;
}
struct ImGuiPlotArrayGetterData