ADD: Selection

third_party/ImGuizmo/ImGradient.cpp

@@ -0,0 +1,116 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+// v1.92.5 WIP
+//
+// The MIT License(MIT)
+//
+// Copyright(c) 2016-2021 Cedric Guillemet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files(the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions :
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+#include "ImGradient.h"
+#include "imgui.h"
+#include "imgui_internal.h"
+
+namespace ImGradient
+{
+#ifndef IMGUI_DEFINE_MATH_OPERATORS
+   static inline ImVec2 operator*(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x * rhs, lhs.y * rhs); }
+   static inline ImVec2 operator/(const ImVec2& lhs, const float rhs) { return ImVec2(lhs.x / rhs, lhs.y / rhs); }
+   static inline ImVec2 operator+(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x + rhs.x, lhs.y + rhs.y); }
+   static inline ImVec2 operator-(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x - rhs.x, lhs.y - rhs.y); }
+   static inline ImVec2 operator*(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x * rhs.x, lhs.y * rhs.y); }
+   static inline ImVec2 operator/(const ImVec2& lhs, const ImVec2& rhs) { return ImVec2(lhs.x / rhs.x, lhs.y / rhs.y); }
+#endif
+
+   static int DrawPoint(ImDrawList* draw_list, ImVec4 color, const ImVec2 size, bool editing, ImVec2 pos)
+   {
+      ImGuiIO& io = ImGui::GetIO();
+
+      ImVec2 p1 = ImLerp(pos, ImVec2(pos + ImVec2(size.x - size.y, 0.f)), color.w) + ImVec2(3, 3);
+      ImVec2 p2 = ImLerp(pos + ImVec2(size.y, size.y), ImVec2(pos + size), color.w) - ImVec2(3, 3);
+      ImRect rc(p1, p2);
+
+      color.w = 1.f;
+      draw_list->AddRectFilled(p1, p2, ImColor(color));
+      if (editing)
+         draw_list->AddRect(p1, p2, 0xFFFFFFFF, 2.f, 15, 2.5f);
+      else
+         draw_list->AddRect(p1, p2, 0x80FFFFFF, 2.f, 15, 1.25f);
+
+      if (rc.Contains(io.MousePos))
+      {
+         if (io.MouseClicked[0])
+            return 2;
+         return 1;
+      }
+      return 0;
+   }
+
+   bool Edit(Delegate& delegate, const ImVec2& size, int& selection)
+   {
+      bool ret = false;
+      ImGuiIO& io = ImGui::GetIO();
+      ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
+      ImGui::BeginChild(137, size, ImGuiChildFlags_FrameStyle);
+
+      ImDrawList* draw_list = ImGui::GetWindowDrawList();
+      const ImVec2 offset = ImGui::GetCursorScreenPos();
+
+      const ImVec4* pts = delegate.GetPoints();
+      static int currentSelection = -1;
+      static int movingPt = -1;
+      if (currentSelection >= int(delegate.GetPointCount()))
+         currentSelection = -1;
+      if (movingPt != -1)
+      {
+         ImVec4 current = pts[movingPt];
+         current.w += io.MouseDelta.x / size.x;
+         current.w = ImClamp(current.w, 0.f, 1.f);
+         delegate.EditPoint(movingPt, current);
+         ret = true;
+         if (!io.MouseDown[0])
+            movingPt = -1;
+      }
+      for (size_t i = 0; i < delegate.GetPointCount(); i++)
+      {
+         int ptSel = DrawPoint(draw_list, pts[i], size, i == currentSelection, offset);
+         if (ptSel == 2)
+         {
+            currentSelection = int(i);
+            ret = true;
+         }
+         if (ptSel == 1 && io.MouseDown[0] && movingPt == -1)
+         {
+            movingPt = int(i);
+         }
+      }
+      ImRect rc(offset, offset + size);
+      if (rc.Contains(io.MousePos) && io.MouseDoubleClicked[0])
+      {
+         float t = (io.MousePos.x - offset.x) / size.x;
+         delegate.AddPoint(delegate.GetPoint(t));
+         ret = true;
+      }
+      ImGui::EndChild();
+      ImGui::PopStyleVar();
+
+      selection = currentSelection;
+      return ret;
+   }
+}