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Sliders: An initial click within the knob/grab doesn't shift its position. (#1946, #5328) + Adjust default GrabMinSize.

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ocornut
2022-06-20 18:06:34 +02:00
parent f27af1b20a
commit d3fd2630b7
5 changed files with 16 additions and 3 deletions
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11
imgui_widgets.cpp
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@ -2760,8 +2760,17 @@ bool ImGui::SliderBehaviorT(const ImRect& bb, ImGuiID id, ImGuiDataType data_typ
else
{
const float mouse_abs_pos = g.IO.MousePos[axis];
if (g.ActiveIdIsJustActivated)
{
float grab_t = ScaleRatioFromValueT<TYPE, SIGNEDTYPE, FLOATTYPE>(data_type, *v, v_min, v_max, is_logarithmic, logarithmic_zero_epsilon, zero_deadzone_halfsize);
if (axis == ImGuiAxis_Y)
grab_t = 1.0f - grab_t;
const float grab_pos = ImLerp(slider_usable_pos_min, slider_usable_pos_max, grab_t);
const bool clicked_around_grab = (mouse_abs_pos >= grab_pos - grab_sz * 0.5f - 1.0f) && (mouse_abs_pos <= grab_pos + grab_sz * 0.5f + 1.0f); // No harm being extra generous here.
g.SliderGrabClickOffset = (clicked_around_grab && is_floating_point) ? mouse_abs_pos - grab_pos : 0.0f;
}
if (slider_usable_sz > 0.0f)
clicked_t = ImSaturate((mouse_abs_pos - slider_usable_pos_min) / slider_usable_sz);
clicked_t = ImSaturate((mouse_abs_pos - g.SliderGrabClickOffset - slider_usable_pos_min) / slider_usable_sz);
if (axis == ImGuiAxis_Y)
clicked_t = 1.0f - clicked_t;
set_new_value = true;