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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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2
docs/CHANGELOG.txt
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@ -64,6 +64,8 @@ Other changes:
duplicate with this fix. (#7399, #7404) [@GamingMinds-DanielC]
- TreeNode: Added ImGuiTreeNodeFlags_SpanTextWidth to make hitbox and highlight only
cover the label. (#6937) [@dimateos]
- ProgressBar: Added support for indeterminate progress bar by passing an animated
negative fraction, e.g. ProgressBar(-1.0f * GetTime()). (#5316, #5370, #1901)[@gan74]
- Text, DrawList: Improved handling of long single-line wrapped text. Faster and
mitigitate issues with reading vertex indexing limits with 16-bit indices. (#7496, #5720)
- Backends: OpenGL: Detect ES3 contexts on desktop based on version string,

5
imgui_demo.cpp
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@ -1909,6 +1909,11 @@ static void ShowDemoWindowWidgets()
char buf[32];
sprintf(buf, "%d/%d", (int)(progress_saturated * 1753), 1753);
ImGui::ProgressBar(progress, ImVec2(0.f, 0.f), buf);
ImGui::ProgressBar(-1.0f * (float)ImGui::GetTime(), ImVec2(0.0f, 0.0f), "Searching..");
ImGui::SameLine(0.0f, ImGui::GetStyle().ItemInnerSpacing.x);
ImGui::Text("Indeterminate");
ImGui::TreePop();
}

30
imgui_widgets.cpp
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@ -1291,17 +1291,33 @@ void ImGui::ProgressBar(float fraction, const ImVec2& size_arg, const char* over
if (!ItemAdd(bb, 0))
return;
// Out of courtesy we accept a NaN fraction without crashing
// 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);
const float fraction_not_nan = (fraction == fraction) ? fraction : 0.0f;
// Out of courtesy we accept a NaN fraction without crashing
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
// Don't display text for indeterminate bars by default
if (!is_indeterminate || overlay != NULL)
{
char overlay_buf[32];
if (!overlay)
{
@ -1311,7 +1327,11 @@ void ImGui::ProgressBar(float fraction, const ImVec2& size_arg, const char* over
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);
{
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()