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ColorEdit: Preserve last saturation value when V=0. Disable Hue editing lock.

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This workaround is no longer necessary because preserving hue value prevents it from resetting when it is edited in said condition.
This commit is contained in:
Rokas Kupstys 2020-01-06 16:15:59 +02:00 committed by omar
parent 5e2329b98e
commit 32c33c6659
2 changed files with 27 additions and 10 deletions
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1
imgui_internal.h
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@ -1121,6 +1121,7 @@ struct ImGuiContext
ImGuiID TempInputTextId; // Temporary text input when CTRL+clicking on a slider, etc. ImGuiID TempInputTextId; // Temporary text input when CTRL+clicking on a slider, etc.
ImGuiColorEditFlags ColorEditOptions; // Store user options for color edit widgets ImGuiColorEditFlags ColorEditOptions; // Store user options for color edit widgets
float ColorEditLastHue; // Backup of last Hue associated to LastColor[3], so we can restore Hue in lossy RGB<>HSV round trips float ColorEditLastHue; // Backup of last Hue associated to LastColor[3], so we can restore Hue in lossy RGB<>HSV round trips
float ColorEditLastSaturation; // Backup of last Saturation associated to LastColor[3], so we can restore Saturation in lossy RGB<>HSV round trips
float ColorEditLastColor[3]; float ColorEditLastColor[3];
ImVec4 ColorPickerRef; // Initial/reference color at the time of opening the color picker. ImVec4 ColorPickerRef; // Initial/reference color at the time of opening the color picker.
bool DragCurrentAccumDirty; bool DragCurrentAccumDirty;

36
imgui_widgets.cpp
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@ -4222,8 +4222,13 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
{ {
// Hue is lost when converting from greyscale rgb (saturation=0). Restore it. // Hue is lost when converting from greyscale rgb (saturation=0). Restore it.
ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]); ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
if (f[1] == 0 && memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0) if (memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0)
f[0] = g.ColorEditLastHue; {
if (f[1] == 0)
f[0] = g.ColorEditLastHue;
if (f[2] == 0)
f[1] = g.ColorEditLastSaturation;
}
} }
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]) }; 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]) };
@ -4262,16 +4267,15 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
SameLine(0, style.ItemInnerSpacing.x); SameLine(0, style.ItemInnerSpacing.x);
SetNextItemWidth((n + 1 < components) ? w_item_one : w_item_last); SetNextItemWidth((n + 1 < components) ? w_item_one : w_item_last);
// Disable Hue edit when Saturation is zero // FIXME: When ImGuiColorEditFlags_HDR flag is passed HS values snap in weird ways when SV values go below 0.
const bool disable_hue_edit = (n == 0 && (flags & ImGuiColorEditFlags_DisplayHSV) && i[1] == 0);
if (flags & ImGuiColorEditFlags_Float) if (flags & ImGuiColorEditFlags_Float)
{ {
value_changed |= DragFloat(ids[n], &f[n], 1.0f/255.0f, disable_hue_edit ? +FLT_MAX : 0.0f, disable_hue_edit ? -FLT_MAX : hdr ? 0.0f : 1.0f, fmt_table_float[fmt_idx][n]); value_changed |= DragFloat(ids[n], &f[n], 1.0f/255.0f, 0.0f, hdr ? 0.0f : 1.0f, fmt_table_float[fmt_idx][n]);
value_changed_as_float |= value_changed; value_changed_as_float |= value_changed;
} }
else else
{ {
value_changed |= DragInt(ids[n], &i[n], 1.0f, disable_hue_edit ? INT_MAX : 0, disable_hue_edit ? INT_MIN : hdr ? 0 : 255, fmt_table_int[fmt_idx][n]); value_changed |= DragInt(ids[n], &i[n], 1.0f, 0, hdr ? 0 : 255, fmt_table_int[fmt_idx][n]);
} }
if (!(flags & ImGuiColorEditFlags_NoOptions)) if (!(flags & ImGuiColorEditFlags_NoOptions))
OpenPopupOnItemClick("context"); OpenPopupOnItemClick("context");
@ -4354,6 +4358,7 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
if ((flags & ImGuiColorEditFlags_DisplayHSV) && (flags & ImGuiColorEditFlags_InputRGB)) if ((flags & ImGuiColorEditFlags_DisplayHSV) && (flags & ImGuiColorEditFlags_InputRGB))
{ {
g.ColorEditLastHue = f[0]; g.ColorEditLastHue = f[0];
g.ColorEditLastSaturation = f[1];
ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]); ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
memcpy(g.ColorEditLastColor, f, sizeof(float) * 3); memcpy(g.ColorEditLastColor, f, sizeof(float) * 3);
} }
@ -4536,8 +4541,13 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
{ {
// Hue is lost when converting from greyscale rgb (saturation=0). Restore it. // Hue is lost when converting from greyscale rgb (saturation=0). Restore it.
ColorConvertRGBtoHSV(R, G, B, H, S, V); ColorConvertRGBtoHSV(R, G, B, H, S, V);
if (S == 0 && memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0) if (memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0)
H = g.ColorEditLastHue; {
if (S == 0)
H = g.ColorEditLastHue;
if (V == 0)
S = g.ColorEditLastSaturation;
}
} }
else if (flags & ImGuiColorEditFlags_InputHSV) else if (flags & ImGuiColorEditFlags_InputHSV)
{ {
@ -4665,6 +4675,7 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
{ {
ColorConvertHSVtoRGB(H >= 1.0f ? H - 10 * 1e-6f : H, S > 0.0f ? S : 10*1e-6f, V > 0.0f ? V : 1e-6f, col[0], col[1], col[2]); ColorConvertHSVtoRGB(H >= 1.0f ? H - 10 * 1e-6f : H, S > 0.0f ? S : 10*1e-6f, V > 0.0f ? V : 1e-6f, col[0], col[1], col[2]);
g.ColorEditLastHue = H; g.ColorEditLastHue = H;
g.ColorEditLastSaturation = S;
memcpy(g.ColorEditLastColor, col, sizeof(float) * 3); memcpy(g.ColorEditLastColor, col, sizeof(float) * 3);
} }
else if (flags & ImGuiColorEditFlags_InputHSV) else if (flags & ImGuiColorEditFlags_InputHSV)
@ -4719,8 +4730,13 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
G = col[1]; G = col[1];
B = col[2]; B = col[2];
ColorConvertRGBtoHSV(R, G, B, H, S, V); ColorConvertRGBtoHSV(R, G, B, H, S, V);
if (S == 0 && memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0) // Fix local Hue as display below will use it immediately. if (memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0) // Fix local Hue as display below will use it immediately.
H = g.ColorEditLastHue; {
if (S == 0)
H = g.ColorEditLastHue;
if (V == 0)
S = g.ColorEditLastSaturation;
}
} }
else if (flags & ImGuiColorEditFlags_InputHSV) else if (flags & ImGuiColorEditFlags_InputHSV)
{ {