SaveStateSelectorUI: Make less ugly

src/util/imgui_animated.h

@@ -0,0 +1,117 @@
+// SPDX-FileCopyrightText: 2019-2023 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#pragma once
+
+#ifndef IMGUI_DEFINE_MATH_OPERATORS
+#define IMGUI_DEFINE_MATH_OPERATORS
+#endif
+
+#include "common/easing.h"
+
+#include "imgui.h"
+#include "imgui_internal.h"
+
+#include <algorithm>
+
+class ImAnimatedFloat
+{
+public:
+  ImAnimatedFloat() = default;
+
+  bool IsActive() const { return (m_current_value != m_end_value); }
+  float GetCurrentValue() const { return m_current_value; }
+  float GetStartValue() const { return m_start_value; }
+  float GetEndValue() const { return m_end_value; }
+
+  void Stop() { m_end_value = m_current_value; }
+  void SetEndValue(float end_value) { m_end_value = end_value; }
+
+  void Reset(float value)
+  {
+    m_current_value = value;
+    m_start_value = value;
+    m_end_value = value;
+  }
+
+  float UpdateAndGetValue()
+  {
+    if (m_current_value == m_end_value)
+      return m_current_value;
+
+    m_elapsed_time += ImGui::GetIO().DeltaTime;
+
+    const float frac = std::min(0.05f + Easing::OutExpo(m_elapsed_time / m_duration), 1.0f);
+    m_current_value = std::clamp(m_start_value + ((m_end_value - m_start_value) * frac),
+                                 std::min(m_start_value, m_end_value), std::max(m_start_value, m_end_value));
+    return m_current_value;
+  }
+
+  void Start(float start_value, float end_value, float duration)
+  {
+    m_current_value = start_value;
+    m_start_value = start_value;
+    m_end_value = end_value;
+    m_elapsed_time = 0.0f;
+    m_duration = duration;
+  }
+
+private:
+  float m_current_value = 0.0f;
+  float m_start_value = 0.0f;
+  float m_end_value = 0.0f;
+  float m_elapsed_time = 0.0f;
+  float m_duration = 1.0f;
+};
+
+class ImAnimatedVec2
+{
+public:
+  ImAnimatedVec2() = default;
+
+  bool IsActive() const { return (m_current_value.x != m_end_value.x || m_current_value.y != m_end_value.y); }
+  const ImVec2& GetCurrentValue() const { return m_current_value; }
+  const ImVec2& GetStartValue() const { return m_start_value; }
+  const ImVec2& GetEndValue() const { return m_end_value; }
+
+  void Stop() { m_end_value = m_current_value; }
+  void SetEndValue(const ImVec2& end_value) { m_end_value = end_value; }
+
+  void Reset(const ImVec2& value)
+  {
+    m_current_value = value;
+    m_start_value = value;
+    m_end_value = value;
+  }
+
+  const ImVec2& UpdateAndGetValue()
+  {
+    if (m_current_value.x == m_end_value.x && m_current_value.y == m_end_value.y)
+      return m_current_value;
+
+    m_elapsed_time += ImGui::GetIO().DeltaTime;
+
+    const float frac = std::min(0.05f + Easing::OutExpo(m_elapsed_time / m_duration), 1.0f);
+    m_current_value = ImClamp(ImLerp(m_start_value, m_end_value, frac), ImMin(m_start_value, m_end_value),
+                               ImMax(m_start_value, m_end_value));
+    return m_current_value;
+  }
+
+  void Start(const ImVec2& start_value, const ImVec2& end_value, float duration)
+  {
+    if (start_value.x > 100000.0)
+      __debugbreak();
+    m_current_value = start_value;
+    m_start_value = start_value;
+    m_end_value = end_value;
+    m_elapsed_time = 0.0f;
+    m_duration = duration;
+  }
+
+private:
+  ImVec2 m_current_value = {};
+  ImVec2 m_start_value = {};
+  ImVec2 m_end_value = {};
+  float m_elapsed_time = 0.0f;
+  float m_duration = 1.0f;
+};

src/util/util.vcxproj

@@ -2,6 +2,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="..\..\dep\msvc\vsprops\Configurations.props" />
   <ItemGroup>
+    <ClInclude Include="imgui_animated.h" />
     <ClInclude Include="audio_stream.h" />
     <ClInclude Include="cd_image.h" />
     <ClInclude Include="cd_image_hasher.h" />

src/util/util.vcxproj.filters

@@ -71,6 +71,7 @@
     <ClInclude Include="http_downloader_winhttp.h" />
     <ClInclude Include="http_downloader.h" />
     <ClInclude Include="gpu_framebuffer_manager.h" />
+    <ClInclude Include="imgui_animated.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="jit_code_buffer.cpp" />