Method ColorEdit4

KBotExt/imgui/imgui_widgets.cpp:5100–5343

Edit colors components (each component in 0.0f..1.0f range). See enum ImGuiColorEditFlags_ for available options. e.g. Only access 3 floats if ImGuiColorEditFlags_NoAlpha flag is set. With typical options: Left-click on color square to open color picker. Right-click to open option menu. CTRL-Click over input fields to edit them and TAB to go to next item.

// See enum ImGuiColorEditFlags_ for available options. e.g. Only access 3 floats if ImGuiColorEditFlags_NoAlpha flag is set.
// With typical options: Left-click on color square to open color picker. Right-click to open option menu. CTRL-Click over input fields to edit them and TAB to go to next item.
bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flags)
{
	ImGuiWindow* window = GetCurrentWindow();
	if (window->SkipItems)
		return false;

	ImGuiContext& g = *GImGui;
	const ImGuiStyle& style = g.Style;
	const float square_sz = GetFrameHeight();
	const float w_full = CalcItemWidth();
	const float w_button = (flags & ImGuiColorEditFlags_NoSmallPreview) ? 0.0f : (square_sz + style.ItemInnerSpacing.x);
	const float w_inputs = w_full - w_button;
	const char* label_display_end = FindRenderedTextEnd(label);
	g.NextItemData.ClearFlags();

	BeginGroup();
	PushID(label);
	const bool set_current_color_edit_id = (g.ColorEditCurrentID == 0);
	if (set_current_color_edit_id)
		g.ColorEditCurrentID = window->IDStack.back();

	// If we're not showing any slider there's no point in doing any HSV conversions
	const ImGuiColorEditFlags flags_untouched = flags;
	if (flags & ImGuiColorEditFlags_NoInputs)
		flags = (flags & (~ImGuiColorEditFlags_DisplayMask_)) | ImGuiColorEditFlags_DisplayRGB | ImGuiColorEditFlags_NoOptions;

	// Context menu: display and modify options (before defaults are applied)
	if (!(flags & ImGuiColorEditFlags_NoOptions))
		ColorEditOptionsPopup(col, flags);

	// Read stored options
	if (!(flags & ImGuiColorEditFlags_DisplayMask_))
		flags |= (g.ColorEditOptions & ImGuiColorEditFlags_DisplayMask_);
	if (!(flags & ImGuiColorEditFlags_DataTypeMask_))
		flags |= (g.ColorEditOptions & ImGuiColorEditFlags_DataTypeMask_);
	if (!(flags & ImGuiColorEditFlags_PickerMask_))
		flags |= (g.ColorEditOptions & ImGuiColorEditFlags_PickerMask_);
	if (!(flags & ImGuiColorEditFlags_InputMask_))
		flags |= (g.ColorEditOptions & ImGuiColorEditFlags_InputMask_);
	flags |= (g.ColorEditOptions & ~(ImGuiColorEditFlags_DisplayMask_ | ImGuiColorEditFlags_DataTypeMask_ | ImGuiColorEditFlags_PickerMask_ | ImGuiColorEditFlags_InputMask_));
	IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiColorEditFlags_DisplayMask_)); // Check that only 1 is selected
	IM_ASSERT(ImIsPowerOfTwo(flags & ImGuiColorEditFlags_InputMask_));   // Check that only 1 is selected

	const bool alpha = (flags & ImGuiColorEditFlags_NoAlpha) == 0;
	const bool hdr = (flags & ImGuiColorEditFlags_HDR) != 0;
	const int components = alpha ? 4 : 3;

	// Convert to the formats we need
	float f[4] = { col[0], col[1], col[2], alpha ? col[3] : 1.0f };
	if ((flags & ImGuiColorEditFlags_InputHSV) && (flags & ImGuiColorEditFlags_DisplayRGB))
		ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
	else if ((flags & ImGuiColorEditFlags_InputRGB) && (flags & ImGuiColorEditFlags_DisplayHSV))
	{
		// Hue is lost when converting from grayscale rgb (saturation=0). Restore it.
		ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
		ColorEditRestoreHS(col, &f[0], &f[1], &f[2]);
	}
	int i[4] = { IM_F32_TO_INT8_UNBOUND(f[0]), IM_F32_TO_INT8_UNBOUND(f[1]), IM_F32_TO_INT8_UNBOUND(f[2]), IM_F32_TO_INT8_UNBOUND(f[3]) };