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ColorPicker / ColorEdit: restore Hue when zeroing Saturation. (#2722, #2770) - changelog, fixed uninitialized variables, tweaks, renaming.

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omar
2019-09-20 15:31:39 +02:00
parent accb0261b8
commit 38d22bc47d
3 changed files with 16 additions and 10 deletions
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4
docs/CHANGELOG.txt
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@@ -35,10 +35,12 @@ HOW TO UPDATE?
Other Changes:
- Nav, Scrolling: Added support for Home/End key. (#787)
- ColorEdit: Disable Hue edit when Saturation==0 instead of letting Hue values jump around.
- ColorEdit, ColorPicker: In HSV display of a RGB stored value, attempt to locally preserve Hue
when Saturation==0, which reduces accidentally lossy interactions. (#2722, 2770) [@rokups]
- ColorPicker: Made rendering aware of global style alpha of the picker can be faded out. (#2711)
Note that some elements won't accurately fade down with the same intensity, and the color wheel
when enabled will have small overlap glitches with (style.Alpha < 1.0).
- ColorEdit: Disable Hue edit when Saturation==0 instead of letting Hue values jump around.
- TabBar: fixed ScrollToBar request creating bouncing loop when tab is larger than available space.
- TabBar: fixed single-tab not shrinking their width down.
- TabBar: feed desired width (sum of unclipped tabs width) into layout system to allow for auto-resize. (#2768)

4
imgui_internal.h
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@@ -1013,7 +1013,7 @@ struct ImGuiContext
ImGuiID TempInputTextId; // Temporary text input when CTRL+clicking on a slider, etc.
ImGuiColorEditFlags ColorEditOptions; // Store user options for color edit widgets
float ColorEditLastHue;
float ColorEditLastActiveColor[3];
float ColorEditLastColor[3];
ImVec4 ColorPickerRef;
bool DragCurrentAccumDirty;
float DragCurrentAccum; // Accumulator for dragging modification. Always high-precision, not rounded by end-user precision settings
@@ -1158,6 +1158,8 @@ struct ImGuiContext
LastValidMousePos = ImVec2(0.0f, 0.0f);
TempInputTextId = 0;
ColorEditOptions = ImGuiColorEditFlags__OptionsDefault;
ColorEditLastHue = 0.0f;
ColorEditLastColor[0] = ColorEditLastColor[1] = ColorEditLastColor[2] = FLT_MAX;
DragCurrentAccumDirty = false;
DragCurrentAccum = 0.0f;
DragSpeedDefaultRatio = 1.0f / 100.0f;

18
imgui_widgets.cpp
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@@ -4201,9 +4201,9 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
else if ((flags & ImGuiColorEditFlags_InputRGB) && (flags & ImGuiColorEditFlags_DisplayHSV))
{
ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
// Hue is lost when converting from greyscale rgb (saturation=0). Restore it.
if (f[1] == 0 && memcmp(g.ColorEditLastActiveColor, col, sizeof(float) * 3) == 0)
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)
f[0] = g.ColorEditLastHue;
}
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]) };
@@ -4335,7 +4335,7 @@ bool ImGui::ColorEdit4(const char* label, float col[4], ImGuiColorEditFlags flag
{
g.ColorEditLastHue = f[0];
ColorConvertHSVtoRGB(f[0], f[1], f[2], f[0], f[1], f[2]);
memcpy(g.ColorEditLastActiveColor, f, sizeof(float) * 3);
memcpy(g.ColorEditLastColor, f, sizeof(float) * 3);
}
if ((flags & ImGuiColorEditFlags_DisplayRGB) && (flags & ImGuiColorEditFlags_InputHSV))
ColorConvertRGBtoHSV(f[0], f[1], f[2], f[0], f[1], f[2]);
@@ -4514,13 +4514,15 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
float R = col[0], G = col[1], B = col[2];
if (flags & ImGuiColorEditFlags_InputRGB)
{
ColorConvertRGBtoHSV(R, G, B, H, S, V);
// Hue is lost when converting from greyscale rgb (saturation=0). Restore it.
if (S == 0 && memcmp(g.ColorEditLastActiveColor, col, sizeof(float) * 3) == 0)
ColorConvertRGBtoHSV(R, G, B, H, S, V);
if (S == 0 && memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0)
H = g.ColorEditLastHue;
}
else if (flags & ImGuiColorEditFlags_InputHSV)
{
ColorConvertHSVtoRGB(H, S, V, R, G, B);
}
bool value_changed = false, value_changed_h = false, value_changed_sv = false;
@@ -4643,7 +4645,7 @@ 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]);
g.ColorEditLastHue = H;
memcpy(g.ColorEditLastActiveColor, col, sizeof(float) * 3);
memcpy(g.ColorEditLastColor, col, sizeof(float) * 3);
}
else if (flags & ImGuiColorEditFlags_InputHSV)
{
@@ -4696,9 +4698,9 @@ bool ImGui::ColorPicker4(const char* label, float col[4], ImGuiColorEditFlags fl
R = col[0];
G = col[1];
B = col[2];
float preserve_hue = H;
ColorConvertRGBtoHSV(R, G, B, H, S, V);
H = preserve_hue; // Avoids picker losing hue value for 1 frame glitch.
if (S == 0 && memcmp(g.ColorEditLastColor, col, sizeof(float) * 3) == 0) // Fix local Hue as display below will use it immediately.
H = g.ColorEditLastHue;
}
else if (flags & ImGuiColorEditFlags_InputHSV)
{