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ProgressBar: added indeterminate mode by passing an animated negative value. (#5316, #5370, #1901)

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gan74
2024-04-24 19:32:36 +02:00
committed by ocornut
parent b8a44b198c
commit c895e987ad
3 changed files with 39 additions and 12 deletions
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44
imgui_widgets.cpp
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@@ -1291,27 +1291,47 @@ void ImGui::ProgressBar(float fraction, const ImVec2& size_arg, const char* over
if (!ItemAdd(bb, 0))
return;
// Fraction < 0.0f will display an indeterminate progress bar animation
// The value must be animated along with time, so e.g. passing '-1.0f * ImGui::GetTime()' as fraction works.
const bool is_indeterminate = (fraction < 0.0f);
if (!is_indeterminate)
fraction = ImSaturate(fraction);
// Out of courtesy we accept a NaN fraction without crashing
fraction = ImSaturate(fraction);
const float fraction_not_nan = (fraction == fraction) ? fraction : 0.0f;
float fill_n0 = 0.0f;
float fill_n1 = (fraction == fraction) ? fraction : 0.0f;
if (is_indeterminate)
{
const float fill_width_n = 0.2f;
fill_n0 = ImFmod(-fraction, 1.0f) * (1.0f + fill_width_n) - fill_width_n;
fill_n1 = ImSaturate(fill_n0 + fill_width_n);
fill_n0 = ImSaturate(fill_n0);
}
// Render
RenderFrame(bb.Min, bb.Max, GetColorU32(ImGuiCol_FrameBg), true, style.FrameRounding);
bb.Expand(ImVec2(-style.FrameBorderSize, -style.FrameBorderSize));
const ImVec2 fill_br = ImVec2(ImLerp(bb.Min.x, bb.Max.x, fraction_not_nan), bb.Max.y);
RenderRectFilledRangeH(window->DrawList, bb, GetColorU32(ImGuiCol_PlotHistogram), 0.0f, fraction_not_nan, style.FrameRounding);
RenderRectFilledRangeH(window->DrawList, bb, GetColorU32(ImGuiCol_PlotHistogram), fill_n0, fill_n1, style.FrameRounding);
// Default displaying the fraction as percentage string, but user can override it
char overlay_buf[32];
if (!overlay)
// Don't display text for indeterminate bars by default
if (!is_indeterminate || overlay != NULL)
{
ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%.0f%%", fraction * 100 + 0.01f);
overlay = overlay_buf;
}
char overlay_buf[32];
if (!overlay)
{
ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%.0f%%", fraction * 100 + 0.01f);
overlay = overlay_buf;
}
ImVec2 overlay_size = CalcTextSize(overlay, NULL);
if (overlay_size.x > 0.0f)
RenderTextClipped(ImVec2(ImClamp(fill_br.x + style.ItemSpacing.x, bb.Min.x, bb.Max.x - overlay_size.x - style.ItemInnerSpacing.x), bb.Min.y), bb.Max, overlay, NULL, &overlay_size, ImVec2(0.0f, 0.5f), &bb);
ImVec2 overlay_size = CalcTextSize(overlay, NULL);
if (overlay_size.x > 0.0f)
{
float text_x = is_indeterminate ? (bb.Min.x + bb.Max.x - overlay_size.x) * 0.5f : ImLerp(bb.Min.x, bb.Max.x, fill_n1) + style.ItemSpacing.x;
RenderTextClipped(ImVec2(ImClamp(text_x, bb.Min.x, bb.Max.x - overlay_size.x - style.ItemInnerSpacing.x), bb.Min.y), bb.Max, overlay, NULL, &overlay_size, ImVec2(0.0f, 0.5f), &bb);
}
}
}
void ImGui::Bullet()